COMPLETE SPECIFICATION
TRACTOR WITH MULTI SPEED POWER TAKE OFF Field of invention;
The present invention relates to power take off system for motor driven vehicle engaged in agricultural and construction work for the purposes of hauling a trailer or machinery. More particularly, the invention relates to a power take off system for agricultural tractor, in which the power take off shaft is projected from the rear end of the transmission case which in turn has a Power take off shaft speed mechanism for changing the number of rotations.
Background of the invention;
Agricultural tractors are generally provided with at least one power take off shaft in order that implements such as rotary harrows, fertilizer spreaders, sprayer pumps, balers etc. may be driven. Implement manufacturers now manufacture tractors and implements to run at one of three standard speeds namely 540 rpm, lOOOrpm and ground speed. The term" ground speed" means that the rate of rotation of the power take off shaft is proportional to the speed at which the tractor travels across the ground.
Since implements are manufactured to these standards, it is necessary for tractors to be provided with power take off shafts which rotate at the required speed. Power Take off gear trains have been developed which provide for the selection of different speeds such as lOOOrpm, 540rpm and ground speed. Clearly, in case of fixed rotation speed i.elOOO rpm or 540 rpm , this can only be achieved at certain engine speed. The manufacturer selects this method and usually a speed towards maximum engine speed is selected thereby permitting engine speed to fall as load on the power take off shaft increases.
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Where the load on power take off shaft is relatively low, the torque back up provided by running the engine at a high speed is not required.. It is therefore, not efficient not to run the engine at very high speed but this is required in order for power take off shaft to rotate at required speed. In order to overcome this problem, manufacturers often provide 540 rpm economy power take off shaft. The gear train is arranged such that power take off shaft runs at 540rpm with an engine speed of about two thirds the maximum speed and as such the tractor's fuel economy improves axed the engine is quieter.
Gear trains for power take off shafts, where the power take off shaft can be selectively engaged to rotate at 540 rpm, 1000 rpm or ground speed or 540 rpm economy are known. In one known gear trains, separate power take off shafts are provided. Rated speed means the engine speed at which power take off runs at the specified speed in revolutions per minute.
Some of the relevant prior art have been discussed herein below:
US patent 6523429 relates to gear reduction assembly wherein a set of gears with casing and locking means is provided. The said locking means alternately locks one casing with another and simultaneously releasing one casing from another for achieving low speed ratio drive between input and output shafts.
US patent No. 3561277 relates to combination of driven shaft of gear reduction assembly with a motor drive. The said gear train enclosed within a housing and such gear train comprises a toothed circular rack fixed within housing, a motor driven worm, a worm wheel mounted upon the driven shaft, a pinion in mesh with the rack and mounted upon an axle projecting laterally from the worm wheel. Teeth of the circular rack are in mesh with the teeth of the pinions and upon the rotation of the worm wheel by the worm the pinions are made to
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revolve about the circular rack whereby rotation is imparted to the said pinions. The low ratio drive is obtained with the help of clutch engagement between the sleeve and pinion.
All of the above stated prior arts fail to provide the power take off speed mechanism which serves the variety of rotational speeds through the road speed change transmission corresponding to the engine rated speed.
The present invention in particular is designed so as to improve the conventional tractor in which the same power take off shaft has driven through all the number of gears for different 12 clockwise 85 08 Anti clockwise rotational speeds when the Tractor wheels are in steady stop conditions which improvement is referred to as multi speed power take off in respect of agricultural tractor engine. The present invention further provides a simplified operating lever to control the driving speed system 8G reverse/forward movement of tractor at the right 85 left side of operator seat and hence to improve the driving efficiency of operator as well as tractor with a parallel lever for quick changing of reverse/forward movement. The invention further provides a tractor tractor transmission comprising a change speed mechanism, a hift lever for shifting the movement of tractor to reverse or forward . An overdrive gear for accelarating the tracor speed shifting with ordinary speed change lever is also provided.
3. Objective of Invention:
The main object of the present invention is to provide for a power take off system to improve the conventional tractor in which the same power take off shaft has driven through all the number of gears for different 12 clockwise 85 08 Anti clockwise rotational speeds when the Tractor wheels are in steady stop conditions which improvement is referred to as multi speed power take off in respect of agricultural tractor engine.

Another object of the invention is to provide a power take off speed mechanism which serves the variety of rotational speeds through the road speed change transmission corresponding to the engine rated speed.
Another object of the invention is to provide a simplified operating lever to control the driving speed system 85 reverse/forward movement of tractor at the right 85 left side of operator seat and hence to improve the driving efficiency of operator as well as tractor with a parallel lever for quick changing of reverse/forward movement
Another object of the invention is to provide a tractor transmission comprising a change speed mechanism, a shift lever for shifting the movement of tractor to reverse or forward. An overdrive gear for accelerating the tractor speed shifting with ordinary speed change lever is also provided.
Further object of the invention is to provide a cost efficient and economical unit for reducing the speed of motor driven vehicles such as agricultural tractor which is relayed to a trenching machine for its efficient working.
Statement of the Invention:
A power take off system of motor driven vehicle for providing variety of rotational speeds through the road speed change transmission corresponding to the engine rated speed, said system comprising set of Bull Helical Gear, Z-54; B.P.Shaft Z-U Left (helical); B.P.Shaft Z-U Right (helical); DOG ( Multi PTO Shifter lever); P.T.O Shifter Lever; PIN PTO Shifter O20; Output shaft Z-16/12; P.T.O. Shaft; P.T.O. Gear Z-23; Ground P.T.O. Sleeve; Spring holder; P.T.O. Gear Z-27; Multi-P.T.O Shifter Sleeve; Tail Pinion Z-10.
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A tractor transmission system comprising a change speed mechanism, a shift lever for shifting the movement of tractor to reverse or forward, an overdrive gear for accelerating the tractor speed shifting with ordinary speed change lever which further comprises of SIDE GEAR consist of shifter bush reverse forward, shifter bush 5*^, 6*^; shifter bush 3rd, 4* ; shifter bush l^t , 2^^ , shifter bush reverse, shifter bush forward; CM ( reverse) gear Z-31, part no.GB.524; Gear Z-43/17, part no.GB-527; Gear Z-18/17, part no.GB-528; Gear Z-19/17, part no.GB-529; Gear Z-27/17, part no.GB-530; Gear Z-31/17, part no.GB-531; Input gear Z-19, part no.GB-522; Gear Z-18/12, part no.GB-526; Gear Z-35,S-27, part no.GB-532; Gear Z-34, S27, part no.GB-533; Gear Z-26, S27, part no.GB-535; Gear Z-22,S-27, part no.GB-534; Idle gear Z-17, part no.GB-525; Shifter Fork 1^* and 2nd gear, part no.GH-276; Shifter fork 3^^ and 4*^ gear, part no.GH-277; Shifter fork 4* and 5*^ gear, part no.GH-278; Shifter fork Rev. 8s forward, part no.GH-275; Shifter Ring S-27, part no.GB-058; Shifter Ring S-31, part no.053; Lever Assy. (High -low), part no.SG-113; Input Shaft (DC), part No.GB-102.
An operating lever system for agricultural tractor to control the driving speed system 85 reverse/forward movement of tractor at the right &, left side of operator seat and with a parallel lever for quick changing of reverse/forward movement, said system comprises of 4W Idle Gear; 4W Idle Gear Z-25; 4W Transfer HSG Cover; 4W Sleeve S-22, S-18; 4W Driven Gear Z-22, S-22; 4W Transfer Box HSG; 4W Driven shaft S-18,22; 4W Shifter Lever PIN 022; 4W Shifter Lever
Summary of invention:
The present invention relates to a power take off system for agricultural tractor, in which the power take off shaft is projected from the rear end of the transmission case which in turn has a Power take off shaft speed mechanism for changing the number of rotations. The power take off system is provided to improve the conventional tractor

in which the same power take off shaft has driven through all the number of gears for different 12 clockwise 85 08 Anti clockwise rotational speeds when the Tractor wheels are in steady stop conditions which improvement is referred to as multi speed power take off in respect of agricultural tractor engine.
The present invention also relates to a tractor transmission having an overdrive mechanism 85 variety of reverse drive speeds. A shift lever for shifting the reverse 85 forward change speed mechanism and an overdrive gear for accelerating and outputting drive inputted thereto. The present invention also provides a simplified operating lever to control the driving speed system 85 reverse/forward movement of tractor at the right 85 left side of operator seat and hence to improve the driving efficiency of operator as well as tractor with a parallel lever for quick changing of reverse/forward movement.
Another object of the invention is to provide a tractor transmission comprising a change speed mechanism, a shift lever for shifting the movement of tractor to reverse or forward. An overdrive gear for accelerating the tractor speed shifting with ordinary speed change lever is also provided.
The present invention further relates to a tractor transmission system having a side gear shifting lever for comfortable and easy to select speed of tractor. The shift lever for shifting the reverse 85 forward movement of tractor is also provided at left hand side of driver for easy 85 comfortable drive. In this system, the said transmission having the option of side lever gear change and selection of reverse /forward besides the ordinary lever mounted on floor between driver legs. Due to the featuring of side lever shifters in that they provide more free space on the floor. The changed location of the gear shift lever in comparison to the floor mounted shifter makes shifting operation comfortable and easier to operate.
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Brief Description of the drawings;
The features, advantages, and technical and industrial significance of this invention will be described in the following detailed description of embodiments of the invention with reference to the accompanying drawings, in which like numerals denote like elements, and wherein:
FIG 1 is a diagrammatic view showing the P.T.O Shifter Lever
FIG 2 is a diagrammatic view showing the DOG ( Multi PTO Shifter lever)
FIG 3 is a diagrammatic view showing the B.P.Shaft Z-11 Left (helical)
FIG 4 is a diagrammatic view showing the B.P.Shaft Z-11 Right (helical)
FIG 5 is a diagrammatic view showing the PIN PTO Shifter O20
FIG 6 is a diagrammatic view showing the Bull Helical Gear, Z-54
FIG 7 is a diagrammatic view showing P.T.O. Gear Z;23
FIG 8 is a diagrammatic view showing the Output shaft Z-16/12
FIG 9 is a diagrammatic view showing the P.T.O. Gear Z-27
FIG 10 is a diagrammatic view showing the Ground P.T.O. Sleeve
FIG 11 is a diagrammatic view showing the Spring holder
FIG 12 is a diagrammatic view showing the Multi-P.T.O Shifter Sleeve
FIG 13 is a diagrammatic view showing the Tail Pinion Z-10
FIG 14 is a diagrammatic view showing the P.T.O. Shaft

Detailed description of the Invention:
Reference will now be made to the Figures to disclose various aspects of exemplary embodiments of the invention. It is understood that the Figures are diagrammatic and schematic representations of such exemplary embodiments, and are not limiting of the present invention, nor are they necessarily drawn to scale. No inference should therefore be drawn from the Figures as to the dimensions of any invention or element.
The preferred embodiment of the present invention relates to The present invention relates to a power take off system for agricultural tractor, in which the power take off shaft is projected from the rear end of the transmission case which in turn has a Power take off shaft speed mechanism for changing the number of rotations. The power take off system is provided to improve the conventional tractor in which the same power take off shaft has driven through all the number of gears for different 12 clockwise 86 08 Anti clockwise rotational speeds when the Tractor wheels are in steady stop conditions which improvement is referred to as multi speed power take off in respect of agricultural tractor engine.
The present invention also relates to a tractor transmission having an overdrive mechanism 85 variety of reverse drive speeds. A shift lever for shifting the reverse & forward change speed mechanism and an overdrive gear for accelerating and outputting drive inputted thereto. The present invention also provides a simplified operating lever to control the driving speed system & reverse/forward movement of tractor at the right 85 left side of operator seat and hence to improve the driving efficiency of operator as well as tractor with a parallel lever for quick changing of reverse/forward movement.
Another object of the invention is to provide a tractor transmission comprising a change speed mechanism, a shift lever for shifting the

movement of tractor to reverse or forward. An overdrive gear for accelerating the tractor speed shifting with ordinary speed change lever is also provided.
The present invention further relates to a tractor transmission system having a side gear shifting lever for comfortable and easy to select speed of tractor. The shift lever for shifting the reverse 85 forward movement of tractor is also provided at left hand side of driver for easy 85 comfortable drive. In this system, the said transmission having the option of side lever gear change and selection of reverse /forward besides the ordinary lever mounted on floor between driver legs. Due to the featuring of side lever shifters in that they provide more free space on the floor. The changed location of the gear shift lever in comparison to the floor mounted shifter makes shifting operation comfortable and easier to operate.
Example embodiments of the present invention are directed to a transmission capable of operating over a large, or possibly infinite, number of gear ratios. The transmission maintains substantially constant engagement between at least one drive gear and at least one driven gear during gear ratio changes, and can maintain such engagement even while the transmission is in a neutral output state. By maintaining a substantially constant engagement between at least one drive gear and at least one driven gear, the transmission is able, when a load is being driven, to implement changes to an associated gear ratio while simultaneously maintaining the connection of the power to the load.
As noted earlier, information is disclosed throughout this application concerning various possible example embodiments of the invention and various optional aspects that can be implemented in connection with one or more of such example embodiments. It should further be understood that yet additional embodiments are contemplated as

being within the scope of the invention, and can be defined by combining one or more aspects disclosed herein. Accordingly, the disclosed embodiments are examples only and are not intended to limit the scope of the invention in any way. As well, nothing herein is intended, nor should be construed, to constitute either an implicit or explicit assertion that any particular disclosed aspect(s) of any embodiment of the invention constitutes a critical or essential element of one or more embodiments of the invention.
Various terms are used in this disclosure. The use of such terms is made with the recognition and understanding that these and other terms employed herein do not constitute the sole manner in which a particular idea, concept or aspect may be expressed or embodied.

We Claim:
1. A power take off system of motor driven vehicle for providing variety of rotational speeds through the road speed change transmission corresponding to the engine rated speed, said system comprising set of Bull Helical Gear, Z-54; B.P.Shaft Z-11 Left (helical); B.P.Shaft Z-11 Right (helical); DOG ( Multi PTO Shifter lever); P.T.O Shifter Lever; PIN PTO Shifter O20; Output shaft Z-16/12; P.T.O. Shaft; P.T.O. Gear Z-23; Ground P.T.O. Sleeve; Spring holder; P.T.O. Gear Z-27; Multi-P.T.O Shifter Sleeve; Tail Pinion Z-10
2. A power take off system as claimed in claim 1 wherein power take off shaft is projected from the rear end of the transmission system
3. A power take off system as claimed in claim 1 wherein the said shaft system drives through all the number of gears for different 12 clockwise and 08 anti clockwise rotational speeds
4. A power take off system as claimed in claim 3 wherein the revolutions of the working machine are reduced
5. A power take off system as claimed in claim 1 wherein the said tail pinion is in neutral position when driving the said motor vehicle
6. A tractor transmission system comprising a change speed mechanism, a shift lever for shifting the movement of tractor to reverse or forward, an overdrive gear for accelerating the tractor speed shifting with ordinary speed change lever which further comprises of SIDE GEAR consist of shifter bush reverse forward, shifter bush 5*^, 6'^^; shifter bush 3^'^, 4th • shifter bush l^t ^ 2"^^ , shifter bush reverse, shifter bush forward; CM ( reverse) gear Z-31, part no.GB.524; Gear Z-43/17, part no.GB-527; Gear Z-18/ 17, part no.GB-528; Gear Z-19/ 17, part no.GB-529; Gear Z-27/17, part no.GB-530; Gear Z-31/17, part no.GB-

531; Input gear Z-19, part no.GB-522; Gear Z-18/12, part no.GB-526; Gear Z-35,S-27, part no.GB-532; Gear Z-34, S27, part no.GB-533; Gear Z-26, S27, part no.GB-535; Gear Z-22,S-27, part no.GB-534; Idle gear Z-17, part no.GB-525; Shifter Fork 1st and 2"^ gear, part no.GH-276; Shifter fork 3^^ and 4th gear, part no.GH-277; Shifter fork 4th and 5th gear, part no.GH-278; Shifter fork Rev. 86 forward, part no.GH-275; Shifter Ring S-27, part no.GB-058; Shifter Ring S-31, part no.053; Lever Assy. (High -low), part no.SG-113; Input Shaft (DC), part No.GB-102.
7. A tractor transmission system as claimed in claim 6 wherein the side gear shifting lever for shifting the reverse and forward movement of tractor is provided at left hand side of the driver
8. A tractor transmission system as claimed in claim 6 wherein the said ordinary lever is mounted on the floor for more boot space.
9. A tractor transmission system as claimed in claim 6 wherein the said parallel lever is provided for quick reverse and forward movement of the motor driven vehicle.
10. A tractor transmission system as claimed in claim 6 wherein the gear selector or shifter is connected to the said transmission mounted on the floor.
11. An operating lever system for agricultural tractor to control the driving speed system 85 reverse/forward movement of tractor at the right 86 left side of operator seat and with a parallel lever for quick changing of reverse/forward movement, said system comprises of 4W Idle Gear; 4W Idle Gear Z-25; 4W Transfer HSG Cover; 4W Sleeve S-22, S-18; 4W Driven Gear Z-22, S-22; 4W Transfer Box HSG; 4W Driven shaft S-18,22; 4W Shifter Lever PIN 022; 4W Shifter Lever

12. An operating lever system as claimed in claim 11 wherein the overdrive gear is provided for accelerating and outputting drive inputted thereto.
13. An operating lever system as claimed in claim 11 wherein the speed change mechanism is provided for multiple speeds when driving.
14. An operating lever system as claimed in claim 11 wherein variety of reverse speeds are possible along with overdrive mechanism.
15. A power take off system as described in reference to the accompanying description and drawings.