] The present disclosure generally relates to the field of lubrication of a transmission system. More specifically, the present subject matter provides guiding provisions to guide accumulated splashed oil on outer circumference of shifting shafts to predefined areas.
BACKGROUND [0002] The transmission system transmits the power from the engine to the tires of the automobile to make it move and to make it happen in a very controlled manner. The transmission varies the torque, the speed and the direction by changing the transmission ratios. In the transmission system there are a number of components like gears, rotating shafts, bearings, shifting shafts, and fork shifters. [0003] In the transmission system, input shaft receives power from the engine and transmits the same to the counter shaft, which further transmits it to final drive shaft through differential system. Input shaft is having number of gears installed over it which are in constant mesh with same number of gears on countershaft. For particular gear selection or shifting, synchronizer and shift system is installed in the transmission. Shift system consists of shift shaft assemblies each consisting of a fork and a shaft installed over the input or countershaft to help move the sleeve to shift to the desired gear. [0004] The transmission system or casing is filled with lubrication oil up to some level to lubricate the rotating shafts gears, bearings and other internal systems having relative movement. To avoid wear and tear, it is necessary to lubricate each moving part inside transmission. As rotating gears transfer power during operation, lubrication is more important to avoid damage and friction losses.
[0005] There are various ways to provide lubrication to all these components like splash method and forced lubrication. The oil transferred via any such method comes down due to gravity. While falling down, the splashed oil falls over the various components coming across its way and thus lubricating them.

[0006] In the prior arts other methods are also used to lubricate them like in KR101476543B1: Introduced is a manual transmission for a vehicle which can solve damage and noise problems caused by the lack of lubrication by using a lubrication improving structure for collecting oil scattered when a clutch gear is rotated and supplying the collected oil to the clutch gear and a synchronizer ring. The manual transmission for a vehicle includes a lubrication improving structure that is installed in a shift fork, collects oil scattered from the clutch gear and supplies the oil to the clutch gear and the synchronizer ring. [0007] In splashing of oil, most of the oil strike the wall of the transmission casing and components inside the transmission casing. The oil, which strikes the wall of the transmission casing, move along with the wall due to gravity. The oil, which strikes the rotating components, lubricates the same. However, there is some oil, which accumulates over the outer circumference of the shifting shafts and drips randomly anywhere in the transmission casing.
[0008] Therefore, there is requirement for a system to utilize the oil accumulated over the outer circumference on the shifting shafts to lubricate the transmission system in an effective manner.
OBJECTS OF THE INVENTION:
[0009] The primary objective of the present subject matter is to provide
efficient lubrication mechanism to guide the scattered oil over the rotating
components.
[0010] Another objective of the present subject matter is to provide lubrication
at predefined areas/locations.
[0011] Another objective of the present subject matter is to provide guide
mechanism to guide the lubrication oil toward the predefined locations/areas.
SUMMARY OF THE INVENTION:
[0012] The subject matter disclosed herein refers to a transmission system in which lubrication of all the components like gears, bearings, shifting shafts,

rotating shafts like input, output shaft and countershaft is done efficiently by
guiding the splashed oil towards the rotating components.
[0013] In the present subject matter, a plurality of cylindrical conical
protrusions is provided on the shifting shafts to lubricate the predefined areas that
lack proper lubrication while scattered oil falls under gravity onto the various
components. The present plurality of cylindrical-conical protrusions accumulates
oil from the shifting shafts that earlier used to drip down in a random manner.
With the help of present cylindrical conical protrusions, the accumulated oil on
the outer periphery of the shifting shafts is guided over the predefined components
for lubrication.
[0014] In an aspect, at least one finger extending from the outer circumference
of the cylindrical-conical protrusions to guide the accumulated oil in axial or in
radial direction in the transmission casing.
[0015] In an aspect, at least two fingers extend from the outer circumference of
the cylindrical-conical protrusions to guide the accumulated oil in axial or in
radial direction in the transmission casing.
[0016] In an aspect, at least one and at least two fingers define tapered profile.
[0017] In order to further understand the characteristics and technical contents
of the present subject matter, a description relating thereto will be made with
reference to the accompanying drawings. However, the drawings are illustrative
only but not used to limit scope of the present subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS:
[0018] Some non-limiting exemplary embodiments or features of the disclosed subject matter are illustrated in the following drawings.
[0019] Fig. 1 and la illustrate a transmission system having a plurality of shifting shafts and mounting of cylindrical-conical protrusion on the plurality of shifting shafts, in accordance with an embodiment of the present subject matter; [0020] Fig. lb illustrates the position of the cylindrical-conical protrusion on the shifting shaft rod over the rotating components of the transmission system, in accordance with an embodiment of the present subject matter;

[0021] Fig. 2a illustrates another structure of the cylindrical-conical protrusion with the fingers/legs acting as guides to guide the oil/lubricant at the predefined locations in the transmission system, in accordance with another embodiment of the present subject matter;
[0022] Fig. 2b illustrates different structures of the cylindrical-conical protrusion with the fingers/legs acting as guides to guide the oil/lubricant at the predefined locations in the transmission system, in accordance with another embodiment of the present subject matter; and
[0023] Fig. 3, 4, 5, and 6 illustrate the flow of accumulated oil on the outer circumference of the shifting shafts with the cylindrical-conical protrusions having fingers/legs extending in axial and radial direction to guide the accumulated oil in axial and radial direction, in accordance with another embodiment of the present subject matter.
[0024] With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of some embodiments of the invention. In this regard, the description taken with the drawings makes apparent to those skilled in the art how embodiments of the invention may be practiced.
[0025] Identical, duplicate, equivalent, or similar structures, elements, or parts that appear in one or more drawings are generally labelled with the same reference numeral, optionally with an additional letter or letters to distinguish between similar entities or variants of entities, and may not be repeatedly labeled and/or described. References to previously presented elements are implied without necessarily further citing the drawing or description in which they appear. [0026] Dimensions of components and features shown in the figures are chosen for convenience or clarity of presentation and are not necessarily shown to scale or true perspective. For convenience or clarity, some elements or structures are not shown or shown only partially and/or with different perspective or from different point of views.
DETAILED DESCRIPTION OF THE PRESENT INVENTION:

[0027] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features that are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. [0028] These and other advantages of the present subject matter would be described in more detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope. [0029] Fig. 1 illustrates the top view of the present invention illustrating the various rotating components, such as gears and rotating shafts; and various axial moving components shifting shafts, shifting forks. The transmission system 100 comprises a plurality of shifting shafts 102 having shifting forks 104, a countershaft and input shaft 101 having a plurality of gears 103. The plurality of shifting shafts 102 having at least one shifting fork 104 to shift the plurality of gears 103. A plurality of cylindrical conical protrusions 110 provided on outer circumference of the plurality of shifting shafts 102. Each of the shifting shaft may have one or more than one cylindrical conical protrusions 110. The

cylindrical conical protrusions 110 may be assembled over the shifting shafts 102 or it may be integrated with the shifting shafts 102. The cylindrical conical protrusions 110 may define spin top shape having conical ends or cylindrical cone shaped disc. In an embodiment, where the cylindrical conical protrusions 110 is installed around the shifting shafts 102, the cylindrical conical protrusions 110 (it can be interchangeable referred as cylindrical conical disc 110) may have a circular hole at center along axial direction in complementary to the shifting shafts 102. The cylindrical conical protrusions 110 encloses the shifting shafts 102 where the cylindrical conical protrusions 110 bolted along transverse direction or can be installed by way of any known mechanism, such as press fitting, pin joint, spring-actuated connection or using circlip.
[0030] In an embodiment, the cylindrical conical protrusions 110 assembled over the shifting shafts 102 to guide accumulated oil from the circumference of the shifting shafts 102 on predefined components, such as rotating components. [0031] These cylindrical-conical protrusions 110 or the cylindrical conical disc 110 defines smooth axial ends or conical ends defining a fillet profile with the shifting shaft rod 102. The conical ends are integrated with the cylindrical-conical protrusions 110. The conical ends of the cylindrical-conical protrusions 110 assist in collecting and directing the oil/lubricant from the shifting shaft rod toward lower portion to drip the accumulated oil in downward direction. As shown in the fig. lb, the cylindrical-conical protrusions 110 are provided at various locations along axial direction on the shifting shaft rod 102 to lubricate the rotating components such as gears provided on the input shaft and the counter shaft. [0032] Fig. 2a illustrates structure of the cylindrical-conical protrusion 110 with the fingers/legs 110a, 110b, 110c, and llOd acting as guides to guide the oil/lubricant at the predefined locations in the transmission system. As shown in fig. 2a, two fingers 110a, 110b extend from outer periphery of the cylindrical conical protrusion 110 towards the rotating components. Both the fingers 110a, 110b extend away from each other and defining longitudinal/axial distance between both ends. As shown in fig. 2b, the cylindrical conical protrusion 110 may have single finger llOd extending at an angle along the axial axis 'A' to

guide the accumulated oil in axial direction. Further, one finger HOd or two fingers may extend at an angle along radial axis 'R' to guide the accumulated oil in radial direction from the outer circumference of the shifting shaft rod 102. Fig. 2 illustrates different structures of the cylindrical conical protrusions, for example, without figure 110, with single finger in axial direction 110a, with two fingers in axial direction 110b, 110c, with single finger in radial direction HOd, and two fingers in radial direction 1 lOe, 1 lOf.
[0033] In an embodiment, the fingers 110a, 110b, 110c, HOd may define a tapered profile which is tapering towards the rotating components. The tapered profile of the fingers increases the dripping efficiency of the accumulated oil due to gravity at tip of the finger. Working of the invention:
[0034] Referring to fig. 3, the accumulated oil 200 over the outer circumference of the shifting shaft rod 102 freely travels in axial direction and drip randomly anywhere in the transmission casing.
[0035] Fig. 4, 5, and 6 illustrates the movement of the accumulated oil 200 over the outer circumference of the shifting shaft rod 102 and dripping of the accumulated oil 200 at predefined locations.
[0036] Referring to fig. 4 illustrates movement of the accumulated oil 200 over the shifting shaft rod 102 having the cylindrical conical protrusions 110 with two fingers 110a, 110b in axial direction. With the help of two fingers in axial direction, the accumulated oil 200 drips at the axially placed rotating components. [0037] Similarly, fig. 5 illustrates movement of the accumulated oil 200 over the the shifting shaft rod 102 having the cylindrical conical protrusions 110 with single finger in axial direction. With the help of single finger extending in axial direction, the accumulated oil 200 drips at the axially placed rotating component. [0038] Fig. 6 illustrates dripping of accumulated oil 200 in radial direction with single finger, however, two fingers can be provided to drip the accumulated oil 200 at an angle in radial direction or axis R.

[0039] The present subject matter provides mechanism to utilize the accumulated and un-used oil over the surface of the shifting shafts to lubricate the locations where more lubrication is required.
[0040] The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprising", "including" and/or "having" and other conjugations of these terms, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
[0041] The terminology used herein should not be understood as limiting, unless otherwise specified, and is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosed subject matter. While certain embodiments of the disclosed subject matter have been illustrated and described, it will be clear that the disclosure is not limited to the embodiments described herein. Numerous modifications, changes, variations, substitutions and equivalents are not precluded.
[0042] The above description does not provide specific details of the manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.
[0043] Further, the terminology used herein is for describing particular embodiments only and is not intended to be limiting of the disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications.

Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0044] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[0045] It will be appreciated that variants of the above-disclosed and other features and functions, or alternatives thereof, may be combined into many other different systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may be subsequently made by those skilled in the art, which are also intended to be encompassed by the following claims.

We Claim:

1. A transmission system (100) with lubrication mechanism comprising:
a plurality of gears mounted on an input shaft and on a counter shaft;
a plurality of shifting shafts (102) having at least one shifting fork to shift the plurality of gears; and
characterized in that
a plurality of cylindrical-conical protrusions (110) provided on the plurality of shifting shafts (102) to guide accumulated oil from circumference of the plurality of shifting shafts (102) on predefined components.
2. The transmission system (100) as claimed in claim 1, wherein each of the cylindrical conical protrusion (110) from the plurality of cylindrical conical protrusion is provided at longitudinal distance from each other on the plurality of shifting shafts (102).
3. The transmission system (100) as claimed in claim 1, wherein each of the cylindrical conical protrusion (110) has conical ends defining a fillet profile with respect to circumference of the shifting shafts (102).
4. The transmission system (100) as claimed in claim 1, wherein the plurality of cylindrical protrusions (110) are installed or assembled with the plurality of shifting shafts (102).
5. The transmission system (100) as claimed in claim 1, wherein the plurality of cylindrical protrusions (110) are integrated with the plurality of shifting shafts (102).
6. The transmission system (100) as claimed in claim 1, wherein at least one cylindrical conical protrusion (110) from the plurality of cylindrical conical protrusions (110) is provided with one finger (112) to guide the accumulated oil (200) in axial or in radial direction in the transmission casing, the finger (112) extend radially or axially toward the rotating components.

7. The transmission system (100) as claimed in claim 1, wherein at least one of the cylindrical conical protrusion (110) from the plurality of cylindrical protrusions (110) is provided with two fingers (112) to guide the accumulated oil in axial or in radial direction in the transmission casing, the two fingers (112) extend away from each other in radial or in axial direction toward the rotating components.
8. The transmission system (100) as claimed in claim 1, wherein the predefined components are gears, bearings, and components mounted on the rotating input and counter shaft.