LUBRICATION SYSTEM FOR RIGHT-ANGLE DRIVES USED WITH UTII VEHICLES

This is a continuation-in-part of application serial no. 11690785 filed March 2 2007 which is commonly owned. United States Patent Application Serial No. 11399 filcd April 6, 2006 entitlcd Cascading Oil flow Bearing Lubrication system employs oil slinger and is commonly owned with the instant patent application.

FIELD OF THE INVENTION

This invention is used to lubricate bearings which support a high speed pinior (input gear) mounted in a pinion housing which facilitates use of a right angle-drive reducer) with utility vehicles. The invention is in the field of right-angle drives powe by high speed motors for use in utility vehicles. The right angle drives (gear reducers used in, for example, drive systems for utility vehicles but may be used in other applications.

BACKGROUND OF THE INVENTION

Traditionally, Skid-Steer® Loader Machines as made famous by manufactun such as Bobcat® and the like have been powered almost exclusively by hydraulics. Steer® is a registered trademark of Arts-way Manufacturing Co., Inc., a Delaware Corporation. Bobcat® is a registered trademark of Clark Equipment Company of Ne Jersey.

These machines traditionally have gasoline or diesel internal combustion engi that drive a hydraulic pump. The pump usually provides power to two independent!} controlled hydraulic motors one for each side of the machine. The output of each m< drives a drive sprocket with two sets of sprocket teeth. One set of sprocket teeth dris chain that goes to a front whccl sprocket and the other set of sprocket tecth drives a ( that goes to the rear wheel sprocket. The hydraulic pump also provides power for lif functions and power takeoffs for implements that can be connected to the machine.

United States Patent No. 4,705,449 to Christianson et al. discloses the use of electric traction motors. Fig. 1 is a plan view of an electric drive system of United S Patent No. 4,705,449 to Christianson et al. wherein battery 28 supplies electric powe two traction motors 60, 64 which in turn are coupled 84 to a gear reducer 82. Specifically, the '449 patent states at col. 4 line 10 et seq.: "a first traction motor 60 provides the motive force for the left-hand side of the vehicle and a second traction i 64 provides the motive force for a right-hand side of the vehicle 66. Both the first traction motor 60 and the second traction motor 64 are powered by a battery pack 28...Similarly, the traction motor 64 is connected to a spur gear reduction assembly 8 through a coupling 84. The spur gcar reduction assembly engages a chain 86 which turn engages a right rearward gear 74 and left forward gear 90, which are respectivel connected to wheels 14a and 14b through axles 92 and 94. As will be appreciated, tl traction motor 60 is operated independently of the traction motor 64 thereby permitti the wheels 14c, 14d to operate at different speed than wheels 14a and 14b to create s steering.".

United States Patent No. 4,705,449 to Christianson et al. discloses the use of 1 electric traction motors. The motors are not identified by type in Christianson et al a either DC or AC. However, the motors are DC elcctric motors as they are controlled devicc identified in the '449 patent to Christianson, namely, a General Electric EV ] SCR Controller, which is designed to control DC motors. The General Electric EV SCR Controller describes the use of rectifiers to pulse power to DC motors and has r provision for the control of AC motors.

A copy of the EV 1 SCR Controller technical literature is submitted herewith Information Disclosure Statement and describes the use of the controller as being foi control of DC motors. Additionally, the EV 1 SCR Controller is identified in United States Patent No. 4,265,337 to Dammeyer entitled Fork Lift Truck Speed Control U1 Fork Elevation and is used to control a DC motor 92.

Additionally, the EV 1 SCR Controller has been used in numerous automobili (electric vehicles) in conjunction with DC series wound motors which provide high current and high torque at low rpm.

DC traction motors have been used in applications involving forklifts and sim vehicles in the past. Internal combustion engines are not favored in such applications because an internal combustion engine produces zero torque at zero engine speed (R and reaches its torque peak later in its operating range. Internal combustion engines generally require a variable-ratio transmission between the engine and the wheels to match engine speed to the road speeds and loads encountered. A clutch must be prov so that the engine can be mechanically decoupled from the wheels when the vehicle : Additionally, somc slippagc of the engine with respect to the drive train occurs while starting from a stop. Direct current electric traction motors produce considerable tore zero RPM and thus may be connected directly to the wheels. Alternating current mo hydraulic motors and pneumatic motors also produce torque at zero RPM.

Although the term traction motor is usually referred to in the context of a dire current motor, the term is also applicable to alternating current motor applications as
Additionally, the term traction motor is used to describe any motor of whatever type to supply torque and power to a vehicle's wheel, tracks, etc.

In small utility vehicles and the like, space is an important consideration in thi design of the vehicle. It is therefore desirable to use a small motor, electric, hydrauli pneumatic which is capable of supplying required torque and horsepower under all operating conditions. If an electric motor is used it may be an alternating current m or it may be a direct current motor.

Generally, for a given power, high speed electric motors are smaller in size, li in weight, and less expensive than low speed motors. Generally, for a given power, alternating current motors are smaller than direct current motors.

It is highly desirable to save space, weight and cost in the powertrain of a util: vehicle through the use of a high speed motor so that the space may be used for batte controls or other components. It is further highly desirable to save space, weight and in the powertrain of a utility vehicle or similar vehicle through the use of a high spee motor. Spacc may bc conserved for other components of the vehicle and, in doing so necessary to dissipate large amounts of heat from pinion shaft support bearings. The pinion shaft may rotate at 6000-7000 rpm or higher depending upon the application. these rotational speeds considerable heat is generated in the bearings. A high speed from a small electric motor in combination with a right-angle gear reducer saves spa while maintaining performance torque and horsepower requirements.

Previously, external or internal oil pumps have been used in gear reducers to lubricate bearings which support high rotational speed shafts and gears. These devic are powered by one of the shafts within the gear housing or casing. While satisfacto performance has been achieved with the shaft-driven oil pumps, more parts are nece to accomplish lubrication of the bearings of the high speed shaft. Higher speed shaf generate more heat which must be dissipated. External pumps necessitate passagew, through the pump casing to bring oil to bearings and gears.

United Slates Patent Application Serial No. 11399123 filed April 6, 2006 enti Cascading Oil flow Bearing Lubrication system employs an oil slinger and is commc owned with the instant patent application. A bearing lubrication device which inclut output shaft carrier housed within a gear housing is disclosed and claimed. The outp shaft resides partially within the output shaft carrier and upper and lower bearings si the output shaft.

The output shaft carrier includes a first trough for catching lubricati fluid which is slung by an oil slinger. The first trough is in lubricating fluid communication with the upper bearing which pumps the lubricating fluid through th bearing and into an upper passageway which terminates in an opening from which tr lubricating fluid emanates.

United States Patent No. 5,887,678 to Lavender discloses a lubrication appan for shaft bearings which includes a trough extending radially outwardly and inclined downwardly in a direction toward the shaft bearing. United States Patent No. 6,439, to Jones discloses a centrifugal supercharger having a lubricating slinger. United Sta Patent No. 6,698,762 to Newberg et al. discloses a rotary device shaft with oil slinge groove. United States Patent Application Publication No. US 2003/0159888 Al to Burkholder discloses a disk o; 1 slinger assembly. United States Patent Application Publication No. US 2006/0104838 Al to Wood discloses an integrated eccentric fly slinger.

None of the foregoing references provide pinion shaft bearing lubrication in angle gear reducer using an oil slinger, pinion shaft and pinion housing configured f in a utility vehicle.

None of the foregoing references disclose a right angle gear reducer which includes the an oil slinger lubrication system in conjunction with a utility vehicle.

SUMMARY OF THE INVENTION

A bearing lubrication device in a right angle gear reducer includes a gear hou having an interior portion and a lubricating fluid reservoir therein. The principles and structure disclosed herein may be used in a gear reducer whether or not it is denoted right-angle gear reducer. An oil slingcr, rotating pinion shaft, pinion shaft housing, a bearings for supporting the pinion shaft within the pinion shaft housing work togethi provide a continuous supply of oil to the bearings. The pinion shaft includes first and second radially and longitudinally extending passageways therethrough which suppl; from a recess in the nose end of the pinion shaft to the bearings. Oil is slung from the reservoir into the recess of the rotating pinion shaft where it is forced centrifugally outwardly in the cylindrical recess and forced centrifugally through the radially and longitudinally extending passageways to an oil supply chamber formed by the rotatir pinion shaft, shaft housing and bearings. Tapered roller bearings pump the oil from I supply chamber back to the oil reservoir. Oil passageways in the shaft housing enab return of oil from the first bearing set while the other bearing set returns the oil direc the reservoir. In this way a very compact and efficient gcar reducer is produced havi shaft driven oil slinger which is compact and minimizes the number of parts necessa

A method for lubricating bearings supporting a shaft in a gear box is disclose comprises the steps of: slinging oil from a lubricating oil reservoir using an oil sling' toward a first end of a pinion shaft; collecting oil in a cylindrical recess in the first e: the pinion shaft; rotating the shaft and forcing the collected oil radially outwardly in cylindrical recess and into a passageway communicating with the recess and extendi longitudinally and radially fram the recess to the oil supply chamber formed by the s the bearings and the shaft housing; pumping oil from the chamber through the bearir and, returning the oil to the lubricating oil reservoir. Additionally, the step of return the oil pumped from the oil rsturn chamber to the lubricating oil reservoir is perform using a return passageway through the shaft housing.

The right-angle drive described herein is particularly useful in a utility vehich vehicle includes: a frame; a high speed motor having an output shaft; a right-angle g reducer driven by the output shaft of the high speed motor; the right-angle gear redv includes a bearing lubrication device comprising: a gear housing having an interior portion and a lubricating fluid reservoir therein; an oil slinger; a pinion shaft; a pinic shaft housing; a bearing for supporting the pinion shaft within the pinion shaft housi the pinion shaft includes a passageway therethrough; and, the oil slinger supplies oil the passageway communicating the oil to the bearing by way of an oil supply chamb the light-angle gear reducer includes aa output carrier interconnected with an output shaft; the output shaft includes first and second chain drive sprockets; the forward ai rearward wheel shafts each have a wheel sprocket; a first and second chain; the first interengaging the first chain drive sprocket and the forward wheel sprocket driving forward wheel shaft; and, the second chain interengaging the second chain drive spr and the rearward wheel sprocket driving the rearward wheel shaft.

Another method for using a high-speed motor in a utility vehicle is disclosed. method includes the steps of: orienting two high speed motors having shaft driven p gears parallel to the rails of tie vehicle; mounting right angle planetary gear reducer; engagement with said shaft driven pinion gears, each of the planetary gear reducers include a gear driven by said shaft driven pinion gears, the gear driven by said shaft driven pinion gear drives a shaft which includes a second pinion gear which drives a planetary gear set and carrier reacting against a ring gear in the casing of the planeta gear reducer, the carrier of the planetary gear reducer includes a splined output, and of the splined outputs being on the same axis; lubricating bearings supporting the pir gear shafts with an oil slinge:", the pinion gear shafts include a nose portion having a recess, at least one port, and it least one radially and longitudinally extending passag communicating lubricating oil to a supply chamber feeding the lubricating bearings; pumping oil through the lubricating bearings and into a passageway for return to the angle gear reducer; coupling an output shaft to the splined output of the planetary ge reducer and driving the output shaft at a desired rate; and, driving, with chains, the shafts of the vehicle.

As electric motor technology has advanced to provide more performance for '. cost it makes sense to replace hydraulic systems with electric systems. Electric moto typically rotate at much higher RPM than hydraulic motors, particularly those suitab skid-steer loaders. It is desirable to minimize the size of the drive train components to maximize the space available for batteries and controls. The vehicle described he may employ Nickel Metal Hydride, Lithium Ion, Lithium Ion polymer, lead acid batl or other battery technology.

Although onc examplc; of the invention as described herein uses high speed alternating current electric motors it is specifically contemplated that the invention n be used with high speed direct current electric motors, high speed hydraulic motors high speed pneumatic motors.

In one example, the input to the gear box is an offset helical gear driven by pinion. A planetary sun pinion inputs to the planetary stage. Planetary gear sets prov torque multiplication in compact packages. The output of the gear box is a carrier w planetary gear-set reduction including a stationary ring gear. The gear box casing inc a ring gear which is a reaction gear and intermeshes with a three-gear planetary set.' carrier of the planetary gear set includes a spline which intermeshes with a splined 0 shaft.

The offset reduction in the gearbox is an important aspect of the invention as enables the electric motors to be placed side to side. Use of electric motors is enable this application by offsetting the gear box. In this way the left and right side motors be mounted side-by-side without interference while still maximizing available space other components such as bat:eries and controls.

In another example, thp offset gear box may be oriented differently (i.e., rotat 180 degrees) with the motors side by side. Although this example may result in redu the width of the vehicle it may also result in increasing the length of the vehicle. Sti alternatively, this example may be used to drive one of the wheel shafts directly.
A wheel driven utility vehicle includes a frame and two high speed alternatin current electric motors arranged side by side for driving the vehicle. A variable frequ alternating current drive is utilized to control the speed of the motors and hence to c< the direction and turning of the utility vehicle. Instead of high speed alternating cun motors, high speed direct current motors, high speed hydraulic motors and/or high pneumatic motors may be used.

Each alternating current motor has an output which drives an offset planetary reducer. Each offset planetary gear reducer is affixed to the electric motor (or other i type) and includes an output carrier interconnected with an output shaft. Each output includes first and second chain drive sprockets which drive chains interconnected wi shafts driving the front and rear wheels respectively. Each offset planetary gear redu enables use of space saving high speed relatively low-torque alternating current elec motors (or other motors with similar performance characteristics) with attendant lar§ speed reductions. Gear reduction enables the production of sufficient torque at the wheels of the vehicle. Applications in addition to utility vehicles are also specificall contemplated.

In an example of the invrnton n ntilitv vehicle drive svstem comnrise twn alternating current electric motors (or other high speed motors with similar performs characteristics) each having a shaft driven pinion gear. Intermediate gears engage sh driven pinion gears which in :urn drive planctary gears. Each of the planetary gear rcducers include an output
spine and each of the output splines are axially aligned w each other.

In an example of the invention, a method for using a high-speed electric motc high-speed hydraulic, pneumatic or direct current motors) in a utility vehicle include step of orienting the motors having shaft driven pinion gears side by side such that tl shaft driven pinion gears are arranged on opposite sides of the vehicle. Next, the off planetary gear reducers are mounted in engagement with the shaft driven pinion geai Each of the planetary gear reducers include a gear driven by the shaft driven pinion The gear driven by the shaft driven pinion gears includes a shaft portion formed as a second pinion sun gear which drives a planetary gear set and carrier. The planetary set reacts against a ring gear in the casing of the planetary gear reducer. The carrier the planetary gear reducer includes a splined output. Each of the spliaed outputs are the same axis of the other splined output located on the other side of the vehicle. Additionally, the method includes driving an output shaft coupled to the splined oulr the carrier of the planetary gear reducer. And, finally, the method includes driving, chains, the wheel shafts of the vehicle.

It is an object of the present invention to save motor space in a utility vehicle, recreational vehicle, and the like while providing for high torque at the vehicle whee tire.

It is an object of the present invention to provide a planetary gear reducer in a utility vehicle, recreational vehicle and the like which enables use of a smaller, light high speed motor while providing for high torque at the vehicle wheel and tire.

It is an object of the present invention to provide a planetary gear reducer in a utility vehicle, recreational vehicle and the like which enables use of a smaller, light high speed motor selected from the group of alternating current motors, direct currei motors, hydraulic motors, and pneumatic motors.

It is an object of the present invention to provide a planetary gear reducer in a utility vehicle, recreational vehicle and the like which enables use of a smaller, light high speed alternating current electric motor while providing for high torque at the vehicle wheel and tire.

It is an object of the present invention to provide for an efficient planetary ge reduccr for use iu a utility vehicle, recreational vehicle and thie like.

It is an object of the prssenl invention to provide for two offset electric motoi utility vehicle, recreational vehicle, and the like by utilizing two offset planetary gea reducers.

It is an object of the present invention to utilize high speed alternating curren motors in a utility vehicle, recreational vehicle or the like.

It is an object of the present invention to provide a method of using two high electric motors.

It is an object of the present invention to provide offset planetary gear reduce! usc in combination with high speed motors for efficient use of space in a utility vehi

It is an object of the present invention to provide offset planetary gear reducei use in combination with alternating current electric motors for efficient production o torque at the wheels of a utiliy vehicle.

It is an object of the present invention to provide right-angle planetary gear reducers in combination with high speed motors for efficient use of space in a utility vehicle.

It is an object of the prssent invention to provide right-angle planetary gear reducers for use in combination with alternating current electric motors for efficient production of torque at the wheels of a utility vehicle.

It is an object of the present invention to provide right-angle planetary gear reducers which employ an oil slingcr for lubricating bearings which support a pinior, shaft. The pinion gear shaft includes a recess and passageways therethrough communicating with a first chamber for supply of oil to the bearings. A second chat returns oil through the pinion housing adapted for return of oil to the reservoir withi main housing.

It is an object of the present invention to provide a right angle gear reducer hi first and second chambers for the lubrication of the pinion shaft bearings.

It is an object of the present invention to provide a utility vehicle with compa< right angle gear reducers with motors oriented lcngthwise enabling closd spacing of vehicle side rails.

These and other objects of the invention will best be understood when referen made to the Brief Description of the Drawings, Description of the Invention and Cla which follow hereinbelow.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a plan view of a prior art Skid-Steer vehicle powered by two DC trac motors.

Fig. 2 is a top plan view of the utility vehicle illustrating two alternating curre motors oriented side by side with each having an offset planetary gear reducer drivin respective output shaft.

Fig. 2A is an enlarged bortion of Fig. 2 illustrating a portion of the left side oi vehicle.

Fig. 2B is an enlarged portion of Fig. 2A illustrating the gear reducer and out] shaft.

Fig. 2C is an exploded view of the input to the gear reducer, the gear reducer, the output shaft.

Fig. 2D is a perspective view of the carrier and the output shaft.

Fig. 2E is a perspective view of the offset planetary gear speed reducer.

Fig. 3 is a block diagram of the method for using high speed alternating curre electric motors with offset planetary gear reducers.

Fig. 4 is a top plan view of the utility vehicle illustrating two alternating curre motors in conjunction with two right-angle drives.

Fig. 4A is a cross-sectional view of one of the right-angle drives and motor.

Fig. 4B is a perspective view of one of the right-angle drives.

Fig. 4C is a perspective view of the pinion shaft housing.

Fig. 4D is an end view of the pinion shaft housing.

Fig. 4E is a cross-sectional view of the pinion shaft housing taken along the li 4E-4E of
Fig. 4D.

Fig. 4F is a cross-sectional view of the pinion shaft housing taken along the li 4F-4F of Fig. 4D.

Fig. 4G is an enlargement of a portion of Fig. 4A.

Fig. 4H is an enlarged view similar to Fig. 4F with the pinion shaft and beam inserted therein.

Fig. 41 is a perspective view of the pinion shaft and spiral bevel pinion.

Fig. 4J is a top view of the pinion shaft and spiral bevel pinion.

Fig. 4K is a view of the nose end of the pinion shaft and spiral bevel pinion.

Fig. 4L is a cross-sectional view of the gear casing illustrating the spiral beve opinion and the spinal bevel gear.

Fig. 5 is a process flow chart for lubricating bearings supporting a pinion shai pinion shaft housing.

Fig. 6 is a process flow chart for using high speed motors in a utility vehicle \ right angle planetary gear reducers.

The drawings will be best understood when reference is made to the Descript the Invention and Claims below.

DESCRIPTION OF THE INVENTION

Fig. 2 is a top plan view 200 of the utility vehicle illustrating two alternating current electric motors 201, 202 oriented side by side with each having an offset plai gear reducer 203, 204 driving a respective output shaft 208, 214. Although reference numerals 201, 202 refer to high speed alternating current electric motors, it is specific contemplated that other high speed motor types may be used such as direct current motors, hydraulic motors and pneumatic motors.

The utility vehicle includes a frame 205, 206, 250, 251 for supporting vehicle components. As illustrated in Fig. 2, side frame member 205 is on the left hand side vehicle and side frame member 206 is on the right hand side of the utility vehicle. T two side frame members 205, 206 are shown in section in Fig. 2, Fig 2A, and Fig. 21
Frame side member 205 supports first chain driven wheel shaft 210. Sprockei 21 OS is formed as part of the wheel shaft 210 or alternatively is a separate sprocket affixed or attached to the wheel shaft 210. Frame side member 205 also supports the output shaft 208 of the planetary gear reducer 203.

Output shaft 208 includes two sprockets 208S which are identical. The sprocl 208S may be an integral part of shaft 208 or they may be separately attached to the s A metal chain 210 interengages sprockets 21 OS and 208S and communicates horsepi and torque therebetween. The reduction ratio of output shaft driving sprocket 208S t driven sprocket 210S is approximately 2.5-5:1 such that for every rotation of the out shaft 208 the forward sprocket 21 OS and wheel shaft 210 turns 0.4 to 0.2 of a turn oi revolution.

Reduction in speed of the driven sprocket 21 OS results in a correspondir increase in torque for a given applied power.

Referring to Figs. 2 and 2B, output shaft 208 is splined and is coupled to the splined output 230T of the carrier 230 of the planetary gear reducer 203. Frame side member 205 also supports the second chain driven wheel shaft 212. Sprocket 212S formed as part of the wheel shaft 212 or alternatively is a separate sprocket affixed c attached to the wheel shaft 212 for driving a rearward wheel 212A.

Metal chain 211 interengages sprockets 212S and 208S and communicates horsepower and torque therebetween. The reduction ratio of the output shaft driving sprocket 208S to driven sprocket 212S is approximately 2.5-5:1 such that for every rotation of the output shaft 203 the rearward sprocket 212S and wheel shaft 212 rota just 0.4 to 0.2 of a turn or revolution. The reduction in speed of the driven sprocket results in a corresponding increase in torque for a given applied power.

Similarly, the structure and operation of driven sprockets 216S, 21 7S, shafts '. 217, frontward and rearward wheels 216A, 217A, sprockets 214S, shaft 214 and cha 213, 215 on the right side and within the right frame 206 are identical to the left fran side member 205 and frame 205. The reduction ratio of the output shaft driving spro 214S to driven sprockets 21613, 217S is the same as in connection with the left side c vehicle, namely, approximately 2.5-5:1.

Speed reduction of approximately 2.5-5:1 just described are in addition to the speed reduction of the planetary gear reducers 203, 204 which are described further herein. Alternating current motors 201, 202 reside side by side and have output shafi 22IS, 222S with pinion gears 221, 222 thereon for driving two offset planetary gear reducers 203, 204 to effect speed reduction and increase torque. Alternatively, a he pinion gear 221H and a helical driven gear 223H.

Full load electric motor torque is generally defined as follows: Torque (ft - lbs,) = 52.50 horsepower / RPM

Generally, for a given power, high speed electric motors are smaller in size, 1 in weight, and less expensive than low speed motors. Generally, for a given power, alternating current motors are smaller than direct current motors. Additionally, for a given power, alternating current motors are smaller than direct current motors.

Use of planetary gear reducers 203, 204 with alternating current motors 201, saves space. As previously stated the motors may be hydraulic, pneumatic or direct current motors.

Reducers 203 , 204 are approximately 8 inches in diameter and approximately 5.5 inches deep and occupy a volume of approximately 300 cubic inc

Fig. 2A is an enlarged portion 200A of Fig. 2 illustrating a portion of the left of the vehicle and Fig. 2B is a further enlargement of a portion 200B of Fig. 2A illustrating the gear reducer 203 and pinion 221 on output shaft 22IS in more detail.

Referring to Figs. 2A and 2B, the alternating current motors 201, 202 are controlled by a variable frequency drive (not shown) to control the speed of the mote Preferably the alternating current motors are three phase motors. Each of the offset planetary gear reducers 203, 204 include a housing having a ring gear 224 affixed th Ring gear 224 is trapped between housing portions 203, 203A of the reducer. Seals prevent leakage of lubricant from within the gear casing.

Each of the planetary gear reducers 203, 204 includes a carrier 230 having planetary gears 225, 226, 229 intermeshing with the ring gear 224 and an output spli 230T.

Although the planetary gear reducer illustrated has three planetary gears, any reasonable number of planetary gears may be used. Each of the planetary gear reduc includes a gear 223 having teeth 223T driven by the pinion gear 221 of the output sh 221 of the alternating current motor 201. The gear 223 driven by the pinion gear 22 the output shaft 22IS of the alternating current motor 201 includes a shaft portion forming a sun pinion 227 with gear teeth 227T.

Sun pinion or gear 227 intermeshes with three planet gears 225, 226, and 229 of which naturally include teeth 225T, 226T and 229T which intermesh with ring ge; 224. Ring gear 224 extends around the inner circumference of the gearbox. Each of 1 chain drive shafts 208, 214 includes a spline 208T thereon which intermeshes with o spline 230T of the carrier 23C as best viewed in Fig. 2B. Planetary gear reducers 20! 204 effect a speed reduction in the approximate range of between 20-30:1. That is fc every revolution of the input pinion gears 221, 222, the carrier 230 will rotate 1/20 t< of a revolution. Other speed reductions are specifically contemplated. Chain drive sprockets 208S, 214S in combination with wheel shaft sprockets 210S, 212S, 216S i 217S effect a speed reduction in the approximate range of 2.5-5:1. That is, for every rotation of the chain drive sprocket 208S, the wheel sprockets 21 OS, 212S will rotate to 0.2 of a revolution. Other speed reductions are specifically contemplated. Since to is inversely proportional to the shaft rotational speed, torque is increased with a redu in speed.

Other speed reductions are specifically contemplated depending on the desire torque at the wheels and traveling speed of the machine taking loads, inclines and ot variables into consideration. Use of the offset speed reducer as disclosed herein ena the efficient use of space and provides the same torque to the wheel with less input t supplied by the high speed electric motor. The efficiency of the offset speed reducei approximately 95% at rated load.

Use of the offset speed reducer and electric motors enables use of high speed, weight electric motors which are smaller in diameter and output less torque than slo\ heavier larger motors whether they are alternating current motors or direct current m The savings in space, weight and money attained by use of the offset planetary gear reducers with high speed motors is considerable. Use of planetary gear reducers pro a stable transmission of power with torque amplification inversely proportional to th speed reduction. The planetary gear reducers of the instant invention weigh approximately 100 pounds but can vary in weight depending on the materials used si steel, stainless steel or aluminum. The gears 223, 225, 226, 229 and the carrier 230 ; made of steel or stainless steel. Aluminum may be used for the gearbox casing 203, if extremely light weight is desired. The low weight of the gear reducer having a vo of about 300 cubic inches (approx. 8 inches in diameter and 5.5 inches deep) in combination with a light-weight alternating current motor provides a compact low c< arrangement when placed sids by side as illustrated in Fig. 2.

Alternating current electric motors 203, 204 are water cooled motors and run 7,000 to 8,000 RPM. At approximately 7500 RPM the three phase electric motor oi approximately 14.75 ft-lbs. of torque which equates to approximately 21 horsepowei The peak starting torque is about 77 ft-lbs. The motors to be used are about 14 inchi long and 8 inches in diameter and have a volume of approximately 700 cubic inches

Fig. 2C is an exploded view 200C of the input to the gear reducer 221T, the g reducer 203, and the output shaft 208. Referring to Figs. 2B and 2C, sun pinion 227 supported by bearing 223B and 227B. Use of gear 223 enables the planetary gear re to be offset as it is driven by pinion 221 which is on the shaft 22 IS of the electric mo Three planet gears 225, 226 and 229 and, more specifically, their teeth 225T, 226T a 229T intermesh with sun pinion teeth 227T and ring gear 234 and its teeth 234T.

Planet gears 225, 226 and 229 are supported by bearings (i.e., 235B) and are pinned to the carrier by pins. See, for example, pin 235 in Figs. 2A and 2B. Pin 22f restrains pin 235 from movement within the carrier 230 and thus secures gear 225 in place. Gear 225 and the other planet gears are, of course, free to rotate but they are securely fastened to the carrier and impart rotational motion to the carrier 230. Refer numeral 225A indicates intemieshing between planet gear teeth 225T and ring gear 224T. Referring to Fig. 2A, output shaft 208 is supported by bearings 208B and 208 intermeshes its spline 208T with spline 230T of the carrier.

Planetary gear reducer 203 distributes the load evenly to three planets, 225, 2 and 229. As previously indicated any reasonable number of planet gears from 1 to "i may be used.

Reciting the operation of the gear reducer, torque is applied by shaft 2 through teeth 22 IT of pinion 221 which imparls rotational movement and torque to 223. Gear 223 includes sun pinion 227 which by and through its teeth 227T imparts rotational movement and torque to gears 225, 226 and 229 via teeth 225T, 226T and 229T. As previously stated planet gears 225, 226 and 229 are free to rotate and imp

rotational movement to carrie- 230 effecting a speed reduction which is transmitted t output shaft 208 which is interconnected with the carrier spline 230T. The gearbox : 203A is separable into two portions 203 and 203A and they trap ring gear 224 when gearbox is secured by fastener 240A to the clcctric motor 201 and when the portions 203A are secured together by fastener 240.

Fig. 2D is a perspective view 200D of the carrier 203, 203A, planet gears 22' 225, and output shaft 208 witn a corresponding spline 208T. Fig. 2E is a perspective 200E of the offset planetary gear reducer without bearing 208B illustrated therein. T principal dimensions of the offset planetary gear reducer are approximately 8 inches diameter and 5.5 inches deep neglecting the input housing 241 which houses pinion The offset planetary gear reducer is generally cylindrically shaped and includes a ho 241 for the shaft driven pinion gear 221. A flange (unnumbered) is fastened to the r 201.

Fig. 3 is a block diagram 300 illustrating a method for using high-speed elect motors in combination with offset planetary gear reducers in a utility vehicle. The fi. step includes orienting two high speed electric motors having shaft driven pinion ge; side by side 301 such that their shaft driven pinion gears are arranged on opposite si' the vehicle. Next, the method includes mounting offset planetary gear reducers in engagement with the shaft driven pinion gears 302. Each of the planetary gear reduc 203, 204 include a gear driven by the shaft driven pinion gears 221, 222. The gear driven by the shaft driven pinion gears includes a shaft portion formed as a sun pinic gear 227 which drives a planetary gear set and carrier 230 reacting against a ring ge 224 in the casing of the planetary gear reducer 203, 203 A. The carrier 230 of the planetary gear reducer includes a splincd output 230T and each of the splincd output 230T -are on the same axis. The method further includes driving an output shaft 208, coupled to the splined output 230T of the planetary gear reducer. Finally, the methoc includes driving, with chains (209, 211, 213, 215), the wheel shafts (210, 212, 216,: of the vehicle.

Fig. 4 is a top plan view 400 of the utility vehicle illustrating two alternating current motors 495A, 496A in conjunction with two right-angle drives 495, 496. Eac the right angle drives includes a main housing 401 and a pinion housing 402. Frame supports 250, 251 support motors 495A, 496A. Main housing 401 and gear housing are preferably made of 8620H annealed steel. See Fig. 4A. Main housing 401 is approximately 10" in diameter and 8" long. Pinion housing 402 is approximately 3" and 4" in diameter. Motors 495A, 496A are preferably electric motors but may be hydraulic or pneumatic motors.

Fig. 4A is a cross-sectional view 400 A of one of the right-angle drives 495 ai motor 495A taken along the lines 4A-4A of Fig. 4B. A portion of the main housing defines a fluid reservoir which holds oil 498 at a level as indicated by reference num 499. See Fig. 4L. Oil 498 is illustrated in the reservoir formed by the main housing and the spacer 401A and it is used to lubricate the intermeshing spiral bevel pinion g and the spiral bevel gear as well as the planetary output gear set. Additionally, oil 49 used to lubricate all bearings in the pinion housing and the main housing. Pinion hoi 402 includes a flange 402A for connection to the motor 495A. Pinion housing 402 further includes a flange 402B for connection with gear box 401. Spacer 401A is us interconnect the main housing 401 of the right angle drive 495 to the vehicle sidewa 205.

Fig. 4B is a perspective view 400B of one of the right-angle drives 495 and rr 495A. Referring to Figs. 4A and 4B, flange 402A secures the pinion housing to the i 495A. Gear housing 403 is secured to main housing 401 with threaded bolts 435. G housing 403 includes a polycarbonate cap 404 secured therein by a snap ring 431 an sealed with an O-ring 428. The main housing is attached to the spacer 401A and the support 205 using bolts not s'lown.

Spiral bevel pinion, sometimes referred to herein as the spiral bevel pinion, g 405 and spiral bevel gear 406 are preferably made of 8620H annealed steel.

Still referring to Fig. 4B, motor mounting bolls 434 secure the motor 495A tc flange 402A of the pinion housing. Inspection plugs 438, 439 and 439 are illustrated Fig. 2B and enable quick and easy inspection of the main housing and/or enable the addition of oil.

Referring to Fig. 4A, bearings 419A, 419B support the spiral bevel gear 406 is driven by the spiral pinion gear 405. Bearings 419A, 419B are supported by cones 422A and cups 423, 423A. Spiral bevel gear bearing retention plate 412 traps and se bearing 419A against stop 479. Preferably the retention plate is made of mild steel. Retention bolt 435 secures spiral gear bearing retention plate 412 to the spiral bevel 406. A shim 419 is used between the bearing retention plate 412 and the gear body 4 Spiral gear housing 403 is sealed with respect to main housing 401 with O-ring seals Pinion housing 402 is preferably made of mild steel as is gear housing 403. Gear ho 403 is secured to the pinion housing 402 using a pinion housing shim pack 418 and i housing shim pack 417. Pinion housing seal 426 seals the gear housing 403 and the i housing 401 to the pinion housing 402.

Still referring to Fig. 4 A, spiral pinion gear teeth 405 intermesh with spiral be gear teeth 406A of the spiral gear 406. Spiral bevel gear 406 includes a spline 476 w intermeshes with a reciprocal spline 445 in the sun gear shaft 407 to drive the oil sli 413 and the sun gear 445A. Sun gear shaft retaining ring 432 positions sun gear shai and prevents rightward travel of the shaft 407 when viewing Fig. 4A. Thrust plate 4 prevents shaft 407 from travel in the leftward direction when viewing Fig. 4A.

Still referring to Fig. 4 A, the input to the gear box is the pinion shaft 405 and bevel gear 405. Pinion shaft 405A drives gear 406 which in turn drives sun gear sha and sun gear 445A. The planetary sun gear inputs to the planetary stage. Planetary g sets provide torque multiplication in compact packages. The output of the gear box a carrier 410 with a planetary gear-set reduction including a stationary ring gear 409. Carrier 410 is preferably mace of D7003 grade steel. The main housing or casing 40 includes ring gear 409 which is a reaction gear and intermeshes with a three-gear planetary set comprising planet gears 408. Ring gear 409 is secured to the main hous 401 though bolts not viewed in Fig. 4A. The carrier 410 of the planetary gear set inc an internal spline 481 which intermeshes with a splined output shaft 208A which is t output to drive the vehicle. The right angle planetary gear reducers 495, 496 effect speed reduction in the approximate range of between 20-30:1. That is for every revo of the input pinion gear 405, the carrier 410 will rotate 1/20 to 1/30 of a revolution. ( speed reductions are specifically contemplated As discussed above in regard to Figs 2E, use of electric motors, hydraulic motors and/or pneumatic motors is specifically contemplated. The right angle planetary gear drive with the above stated speed redu enables use of a utility vehicle having a relatively narrow width between side rails.

Still referring to Fig. A A, planet gears 408 include gear teeth 408T driven by gear teeth 445A. Planet gears 408 are pinned to the carrier 410 using roll pins 433 mounted to planet pins 411 which provide support for the gears. Needle roller beari 424, spacers 416 and thrust bearings 415 position and support the planet gears 408 fi rotation about the planet pins 411.

Fig. 4G is an enlargement 400G of a portion of Fig. 4A. Pinion housing 402 generally cylindrically shaped and carries pinion shaft 405 A supported by roller beai 451 and 452. Roller bearings 451 are supported by cup 421 and cone 420 and the rol bearings 452 are supported by cup 421A and cone 420A. Inner circumferential stop in conjunction with locknut 429 and pinion tanged lockwasher 430 support and secu: bearings 451 and 452 within the pinion housing. Tang 460 of lockwasher 430 interengages slot 459 in pinion shaft 405A and is compressed by locknut 429 threadi interengaging 429A shaft 405 A.

Still referring to Figs. 4A and 4G, pinion shaft 405 A includes grooves 455 wl interengage motor coupling 455A for driving the pinion shaft. Pinion shaft rotates at approximately 6-7000 rpm. Heat dissipation from the bearings is addressed by suppl oil to chamber 453 formed between roller bearings 451, 452, pinion shaft 405A and interior of the pinion housing 402. Chamber 453 is fed by ports 446B, 447B in the p shaft 405A. Ports 446B, 447B are supplied by passageways 405B, 405C. Passagewe 405B, 405C are fed by ports 405E, 405F which are located in cylindrical recess 4051 Ports 405E and 405F are loca.ted diametrically opposite each other in cylindrical rec< 405D. Scc, Fig. 4L, a cross-sectional view 400L of the gear casing. Cylindrical rccc 405D receives oil from oil slinger 413 as viewed in Fig. 4A as pinion shaft 405A rol Oil slinger 413 is coupled to shaft 407 by a press fit or threaded interconnecti 407A and rotates therewith.

Gear 406 includes spiral bevel teeth 406A interengagin teeth 405 of spiral bevel pinion 405A. Oil slinger 413 is approximately 4.5 inches ir diameter. Fig. 4L is a cross-siectional view 400L of the gear casing indicating shaft in phantom driving oil slinger 413 which picks up oil 499 from the reservoir within 1 main housing 401 and deposits it into the rotating recess 405D. Fig. 4A illustrates oi as indicated by flow arrow 471 from the oil slinger 413.

Referring to Figs. 4A, 4G and 4L, as pinion shaft 405A rotates, oil in recess A is urged radially outwardly under centrifugal force and into ports 405E and 405F. As flows into ports 405E and 405F it is urged into and through radially and longitudinal extending passageways 405B and 405C under centrifugal force as indicated by flow arrows 457, 458. Passageways 405B and 405C terminate, respectively, in ports 4461 447B which communicate with chamber 453. Ports 446B and 447B are in groove 46 the exterior of the pinion shaft 405 A and communicate with and supply oil to chamb 453. See Figs. 4G, 41 and 4J.

Still referring to Figs. 4A and 4G, chamber 453 fills with oil after shaft 405A makes a sufficient number of revolutions (following startup) and supplies oil to tape roller bearings 451 and 452 whereby oil is pumped outwardly through the bearings. Tapered roller bearings 452 pump oil to reservoir 499 and tapered roller bearings 45 pump oil to oil return chamber 454. Chamber 454 is bounded by pinion housing 402 washer 429, lock nut 429, pinion shaft 405A, motor coupling 455A and motor input 425. Preferably seal 425 is a Viton seal. Wave spring 442 resides between the moto the motor input seal 425.

Chamber 454 communicates with ports 494, 497 in inner circumferential grot 448 which in turn communicate with passageways 446A and 447A. See Fig. 4H. P< 446B and 447B are formed in inner circumferential groove 448 in the interior of the pinion housing 402. Pinion housing 402 is generally cylindrically shaped with flang 402A, 402B for interconnection with the main housing 401 of the gear box and the r 495A. Passageways 446A, 447B terminate, respectively, in ports 446, 447 which pe oil to be discharged into the main housing 401 which serves and forms the oil reserv Ports 446 and 447 are preferably arranged vertically such that port 446 is submerged below the oil level 499.

Fig. AC is a perspective view 400C of the pinion shaft housing 402 illustratin motor flange 402A and main housing flange 402B. Ports 446 and 447 are illustrated their vertical orientation. Other orientations of the ports 446 and 447 are specificall; contemplated. Access ports 440A are illustrated in Fig. 4C as are flange bolt holes 4 450.

Referring to Figs. 4A and 4H, access ports 440A are illustrated with plugs 440 threaded therein. Fig. 4D is a:n end view 400D of the pinion shaft housing illustratin vertical orientation of ports 446, 447. Ordinarily port 446 will be submerged in oil. configurations with more or fewer oil return ports may be used.

Fig. 4H is an enlarged view 400H similar to Fig. 4F with the pinion shaft 405 and bearings 451, 452 inserted therein. Groove 466 is an outer circumferential groo the pinion shaft 405A viewed in Fig. 4H and 41. Ports 446B and 447B are formed in outer circumferential groove 466 as viewed in Figs. 4G and 4H. Ports 494 and 497 illustrated in Fig. 4H in communication with oil return chamber 454. Oil is pumped tapered roller bearings 451 into oil return chamber 454 and groove 448 in the pinion housing where it flows into passageways 446A and 447A to ports 446 and 447 respectively. Port 446 is actually submersed below the oil line 499 as illustrated in P 4L. Bearings 451, 452 are submersed in oil when the motor 495A is started and pini shaft 405A begins to rotate.

The bearings are lubricated adequately by submersion oil because the pinion shaft (although rotating at approximately 6000 to 7000 rpm) h not yet generated too much heat for the bearings to withstand since they are already lubricated due to their partial submersion in the oil. Full lubrication occurs very quin as the oil slinger 413 gathers oil from the reservoir and slings or throws it into recess 405D and thereafter through the pinion shaft 405A.

Similarly, bearings 419, 419A support sun gear shaft 407 and are adequately lubricated by oil in the reservoir. Sun gear shaft 407 rotates considerably slower tha input pinion shaft 405A thus generating less heat. Bearings 419, 419A sit partially submerged in oil when shaft 407 is not rotating.

Oil is slung from the outer circumference 413A of the oil slinger 413 as illust by flow arrow 471 in Fig. 4A. Some oil may be picked up from the sides of the oil si but the majority of oil 498 is picked up and slung from the outer circumference 413/ the oil slinger. The oil slinger 413 is disc shaped and the outer circumference is not contoured and roughened. However, it is specifically contemplated that various shaj and configurations of oil slingers may be used such that the surfaces of the oil slinge contoured or roughened. The: oil slinger disc 413 is preferably made of mild steel.

Fig. 4E is a cross-sectional view 400E of the pinion shaft housing 402 taken i. the lines 4E-4E of Fig. 4D. Ir.ncr circumferential groove 448 is illustrated in Fig. 4E along with bearing stop 456. Bearing stop 456 and pinion shaft 405A secure tapered bearings 452 in place. Locknut 429 used with lockwasher 429A secures bearing 451 against bearing stop 456. See Figs. 4G and 4H.

Fig. 4F is a cross-sectional view 400F of the pinion shaft housing taken along lines 4F-4F of Fig. 4D and illustrates the oil return passageways 447A, 447 and 446. 446 without the pinion shaft 405A inserted therein.

Fig. 41 is a perspective view 4001 of the pinion shaft 405 A and gear 405. Fig provides a view of the outer circumferential groove 466 communicating with port 42 as well as slot 459 used in locking conjunction with tanged lockwasher 430. Recess in the nose of the pinion gear and shaft reveals port 405F therein. Pinion shaft 405.A illustrates exterior threads 429A for interconnection with locking nut 429 as illustral Fig. 4A for the purpose of trapping the bearings 451, 452.

Fig. 4J is a top view 400J of the pinion shaft 405A and gear 405 and Fig. 4K view 400K of the nose end of the pinion shaft 405A and gear 405. Recess 405D anc ports 405E and 405F are viewed in Fig. 4K.

Fig. 4L is a cross-sectional view 400L of the gear casing indicating shaft 407 phantom driving oil slinger 413 which picks up oil 499 from the reservoir within the housing 401 and deposits it into the rotating recess 405D of the pinion shaft 405A. P spiral bevel gear teeth 405 intermesh with spiral bevel gear teeth 406A of gear 406 t effect a speed reduction. Bearing cones 423, 423 A are illustrated for support of the 407 as is bearing retention plate 412 and retention bolts 435.

Fig. 5 is a process flow chart 500 for lubricating bearings supporting a pinion in a pinion shaft housing. A method for lubricating bearings supporting a pinion sru a pinion shaft housing is disclosed. The method includes the steps of: slinging oil fro lubricating oil reservoir using an oil slinger at a first end of a shaft 501; collecting oi cylindrical recess in the first snd of the shaft 502; rotating the shaft and forcing the collected oil radially outwardly in the cylindrical recess and into a passageway communicating with the recess and extending longitudinally and radially from the ro to a chamber formed by said shaft, the bearings and a shaft housing 503; pumping c from the chamber through the bearings 504; and, returning the oil to the lubricating reservoir 505. The step of returning the oil to the lubricating oil reservoir may be performed using a return passageway through the shaft housing. The step of rotating shaft and forcing the collected oil radially outwardly in the cylindrical recess includ< forcing the collected oil into a second passageway communicating with the recess ai extending longitudinally and radially from the recess to the chamber formed by the s the bearings and the shaft housing.

Fig. 6 is a process flow chart 600 for using high speed motors in a utility vehi with right angle planetary ges.r reducers. A method for using high-speed motors in a utility vehicle is also disclosed and includes the steps of: orienting two high speed n having shaft driven pinion gears parallel to the rails of the vehicle 601; mounting rig angle planetary gear reducers in engagement with the shaft driven pinion gears 602, of the planetary gear reducers, include a gear driven by the shaft driven pinion gears, gear driven by the shaft driven pinion gear includes a shaft portion formed as a secoi pinion gear which drives a planetary gear set and carrier reacting against a ring gear casing of the planetary gear reducer, the carrier of the planetary gear reducer include splined output, and each of the splined outputs being on the same axis; lubricating bearings supporting the pinion gear shafts with an oil slinger 603, the pinion gear sh include a nose portion having a recess, at least one port, and at least one radially and longitudinally extending passageway communicating lubricating oil to a chamber fe said lubricating bearings; puriping oil through the lubricating bearings and into a passageway for return lo the right angle gear reducer 604; coupling an output shaft t splined output of the planetary gear reducer and driving the output shaft at a desired 605; and, driving, with chains, the wheel shafts of the vehicle 606.

A list of reference numerals follows. Reference Numerals 14a-d-lires of vehicle

28-battery

60, 64-motor

62, 66-sidcs of vehicle

68, 84-coupling

70, 82-spur gear reduction assembly

72, 86-chain

74, 76, 88, 90-gears

78, 80, 92, 94-axles

70, 82-spur gear reduction assembly

100-prior art utility vehicle

200-utility vehicle

200A-enlarged portion of utility vehicle

200B-further enlargement of planetary gear reducer

200C-exploded view of powertrain

200D-perspeclive exploded view of carrier and output shaft

200E-perspective view of of fset planetary gear reducer

201, 202-alternating current motor

203.203A, 204-gearbox

205, 206-vehicle side wall

208, 214-output shafts

208B, 223B, 227B, 235B, 203C-bearing 208T-spline on output shaft

209, 211, 213, 215-drivc chains

210, 212, 216, 217-whccl shaft

210A, 212A, 216A, 217A-wt.eel tire 221T-pinion teeth

221, 222-motor shaft pinion gear

221H-helical pinion

221S, 222S-motor shaft

223-gear

223H-helical gear

223B-bearing

223T-teeth on gear

224-stationary ring gear

2241 -ring gear teeth

224S, 259S-seal

225, 226, 229 -planet gear

225A-mesh between planet gear teeth

223T and ring gear teeth 224T

225P-pin

225T, 226T, 229T-planet gear teeth

227- sun pinion

227T-sun gear teeth

230-carricr

230T-spline on carrier

23 5-pin

240, 240A-bolt

241-pinion housing

250, 251-frame member

300-block diagram of method of using high speed motor and offset planetary gear reducers

301-orienting and mounting high speed motors side by side with pinions oppositely arranged

302-mounting offset planetary gear reducer in engagement with the shaft driven pini gears

303-coupling an output shaft to the spined output at a desired rate

304-driving the wheel shifts of the vehicle

400-schematic of right angle drives used in skid-steer application

400A-cross-sectional schematic view of right angle drive

400B-perspective schematic view of right angle drive and motor

400C-perspective schematic view of pinion housing

400D-end schematic view of pinion housing

400E-cross-sectional view of pinion housing taken along line 4e-4e

400F-cross-sectional view of pinion housing taken along line 4f-4f

400G-cross-sectional view of pinion housing and pinion similar to fig. 4e

400H-cross-sectional view of pinion housing and pinion similar to fig. 4f

4001-perspective view of pinion gear and shaft

400J-orthogonal view of pinion gear and shaft

400K-front view of pinion gear

400L-exploded view of pinion housing and pinion gear and shaft

401-main housing

401A-spacer to interconnect right angle drive to vehicle side wall

402-pinion housing

402A-flange portion of pinion housing-motor connection

402B-flange portion of pinion housing-gear box connection

403-gear housing

404-gear housing cap

405-spiral bevel pinion gear teelh

405A-pinion shaft

405B-first passageway

405C-second passageway

405D-recess in pinion shaft

405E-port

405F-port

406-spiral bevel gear

406A-spiral bevel gear teeth

407-sun gear shaft

407A-press fit or threaded interconnection

408-planet gear

408T-planet gear teeth

409-ring gear

410-carrier

411-planet pin

412-spiral gear bearing retention plate

413-oil slinger disc

413A-ouler circumference of oil slinger disc

414-sun gear shaft thrust plate

415-planet gear thrust washers

416-needle roller spacer

417-pinion housing shim pack

418-gear housing shim pack

419-spiral gear bearing shim pack

419A-bearing

419B-bearing

420-spiral pinion tapered bearing cones

420A-spiral pinion tapered bearing cones

421-spiral pinion tapered bearing cups

421A-spiral pinion tapered bearing cups

422-spiral gear tapered bearing cones

422A-spiral gear tapered bearing cones

423-spiral gear tapered bearing cups

423A-spiral gear tapered bearing cups

424-needle roller bearings

425-motor input seal

426-pinion housing o-ring

427-gear housing o-ring

428-gear housing cap o-ring

429-spiral pinion locknut

429A-threaded interconnection of spiral locknut to pinion shaft

430-spiral pinion tanged lockwasher

431-gear housing cap retaining ring

432-sun gear shaft retaining ring

433-roll pin

434-motor mounting bolts

435-pinion gear housing, bearing retention plate bolts

438-drain/fill/inspection plugs

439-inspection plugs with pipe threads

440-1/8 npt pipe plugs

440A-hole

441-1/4 NPT pipe plugs

442-input bearing wave spring

445-spline

445A-sun gear teeth

446-pinion housing port

446A-pinion housing oil return passageway

446B-port in pinion shaft

447-pinion housing port

447A-pinion housing oil return passageway

447B-port in pinion shaft

448-pinion housing inner circumferential groove

449-bolt hole

450-bolt hole

451 -tapered roller bearing

452-tapercd roller bearing

453-oil chamber

454-oil chamber

455-spline on pinion shaft

455A-motor coupling

456-inner circumferential bearing stop

457-arrow indicating oil flow path

458-arrow indicating oil flow path

459-exterior slot in pinion shaft 405A

460-tang on lockwasher 429

466-groove in exterior of pinion shaft

471-flow arrow from oil slinger

476-spline

479-stop

481-spline

494-port

495-right angle drive assembly

495A-motor

496-right angle drive assembly

496A-motor

497-port

498-oil

499-oil level

500 - process flow chart for lubricating bearings supporting a pinion shaft housing

501 - slinging oil from a lubricating oil reservoir using an oil slinger at a first end of
shaft

502 -collecting oil in a cylindrical recess in the first end of the shaft

503 - rotating the shaft and forcing the collected oil radially outwardly in the cylindi recess and into a passageway communicating with the recess and extending longitud and radially from the recess to a chamber

504 - pumping oil from the chamber through the bearings

505 - returning the oil to the lubricating oil reservoir

600 - process flow chart for using high speed motor in a utility vehicle with right and planetary gear reducers

601 - orienting two high speed motors having shaft driven pinion gears parallel to rails of the vehicle 601

602 - mounting right angle planetary gear reducers in engagement with the shaft drn pinion gears

603 - lubricating bearings supporting the pinion gear shafts with an oil slinger

604 - pumping oil through the lubricating bearings and into a passageway for return
the right angle gear reducer

605 - coupling an output shaft to the splined output of the planetary gear reducer and
driving the output shaft at a desired rate

606- driving, with chains, the wheel shafts of the vehicle 606

The invention has been set forth by way of example with particularity. Those skilled in the art will readily recognize that changes may be made to the invention w departing from the spirit and the scope of the claimed invention.

Claims:

1. A bearing lubrication device comprising: a gear housing having an interior portion and a lubricating fluid reservoir therein; an oil slinger; a pinion shaft; a pinio shaft housing; a bearing for s upporting said pinion shaft within said pinion shaft hou said pinion shaft includes a passageway therethrough; and, said oil slinger supplying to said passageway communicating said oil to said bearing.

2. A bearing lubrication device as claimed in claim 2 wherein said pinion she includes a second passageway therethrough for communicating oil to said bearing.

3. A bearing lubrication device as claimed in claim 1 wherein said pinion she includes a first end portion; said first end portion includes a recess for receiving oil J said oil slinger; and, said first passageway communicates with said recess and said bearing.

4. A bearing lubrication device as claimed in claim 2 wherein said pinion sha includes a first end portion; said first end portion includes a recess for receiving oil i said oil slinger; and, said second passageway communicates with said recess and sai bearing.

5. A bearing lubrication device as claimed in claim 3 wherein said recess is cylindrically shaped.

6. A bearing lubrication device as claimed in claim 4 wherein said recess is cylindrically shaped.

7. A bearing lubrication device as claimed in claim 5 wherein said pinion shai includes an exterior and said first passageway extends radially and longitudinally fro said recess in said first end of said pinion shaft to said exterior of said pinion shaft.
8. A bearing lubrication device as claimed in claim 6 wherein said pinion sha includes an exterior and said first and second passageways extend radially and longitudinally from said recess in said first end of said pinion shaft to said exterior o pinion shaft.

9. A bearing lubrication device as claimed in claim 7 further including a sec bearing; a chamber formed between said bearings, said pinion shaft housing and saic pinion shaft; and, said first passageway in communication with said chamber.

10. A bearing lubrication device as claimed in claim 8 further including a sec bearing; a chamber formed between said bearings, said pinion shaft housing and saic pinion shaft; and, said first and second passageways in communication with said chamber.

11. A bearing lubrication device as claimed in claim 9 wherein said pinion si housing includes an interior and an exterior; said first bearing pumps oil from said chamber to said exterior of said pinion shaft housing and said second bearing pumps from said chamber to an oil return passageway communicating with said exterior of pinion shaft housing.

12. A bearing lubrication device as claimed in claim 10 wherein said pinion :

housing includes an interior and an exterior; said first bearing pumps oil to said char and said second bearing pumps oil out of said chamber to said interior of said pinion housing; said pinion shaft housing includes an oil return passageway communicating said interior of said pinion shift housing and said exterior of said pinion shaft housh

13. A wheel driven utility vehicle comprising:

a frame;

a high speed motor having an output shaft;

a right-angle gear reducer driven by said output shaft of said high speed motor said right-angle gear reducer includes a bearing lubrication device comprising: a gear housing having an interior portion and a lubricating fluid reservoir therein; an oil sli a pinion shaft; a pinion shaft housing; a bearing for supporting said pinion shaft witl said pinion shaft housing; said pinion shaft includes a passageway therethrough; and oil slinger supplying oil to said passageway communicating said oil to said bearing;
said right-angle gear reducer includes an output carrier interconnected with ai output shaft;

said output shaft includes first and second chain drive sprockets;

forward and rearward wheel shafts each having a wheel sprocket;

a first and second claim;

said first chain interengaging said first chain drive sprocket and said forward wheel sprocket driving said forward wheel shaft; and,

said second chain interengaging said second chain drive sprocket and said rearward wheel sprocket driv ng said rearward wheel shaft.

14. A method for lubricating bearings supporting a shaft in a gear box, compr
the steps of:

slinging oil from a lubricating oil reservoir using an oil slinger at a first end o shaft;

collecting oil in a cylindrical recess in said first end of said shaft;

rotating said shaft and forcing said collected oil radially outwardly in said cylindrical recess and into a passageway communicating with said recess and extend longitudinally and radially from said recess to a chamber formed by said shaft, said bearings and a shaft housing;

pumping oil from said chamber through said bearings; and,

returning said oil to said lubricating oil reservoir.

15. A method for lubricating bearings supporting a shaft in a gear box as clai in claim 14 wherein the stop of returning said oil to said lubricating oil reservoir is performed using a return passageway through said shaft housing.

16. A method for lubricating bearings supporting a shaft in gear box as claim claim 14 wherein said step of rotating said shaft and forcing said collected oil radiall outwardly in said cylindrical recess includes forcing said collected oil into a second passageway communicating with said recess and extending longitudinally and radial from said recess to said chamber formed by said shaft, said bearings and a shaft hou;

17. A method for using a high-speed motor in a utility vehicle, comprising the steps of:

orienting two high speed motors having shaft driven pinion gears parallel to i rails of the vehicle;

mounting right angle planetary gear reducers in engagement with said shaft d: pinion gears, each of said planetary gear reducers include a gear driven by said shaft driven pinion gears, said gear driven by said shaft driven pinion gear includes a shaf portion formed as a second pinion gear which drives a planetary gear set and carrier reacting against a ring gear in the casing of the planetary gear reducer, said carrier ot planetary gear reducer includes a splined output, and each of said splined outputs be on the same axis;

lubricating bearings supporting said pinion gear shafts with an oil slinger, sail pinion gear shafts include a nose portion having a recess, at least one port, and at lea one radially and longitudinally extending passageway communicating lubricating oil chamber feeding said lubricating bearings;

pumping oil through said lubricating bearings and into a passageway for retur said right angle gear reducer;

coupling an output shaft to said splined output of said planetary gear reducer driving said output shaft at a desired rate; and,

driving, with chains, said wheel shafts of said vehicle.