Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

A TRANSMISSION ASSEMBLY FOR A VEHICLE AND A TRANSMISSION HOUSING THEREOF

APPLICANT:

TVS MOTOR COMPANY LIMITED, an Indian Company at: “Chaitanya”, No.12 Khader Nawaz Khan Road, Nungambakkam, Chennai 600 006.

The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
[0001] The present subject matter relates generally to a transmission assembly and a transmission housing thereof. More particularly but not exclusively, the present subject matter relates to a transmission assembly and a transmission housing with an optimized breather layout and configuration.

BACKGROUND
[0002] A breather circuit in a transmission or gearbox housing plays an indispensable role in ensuring the optimal performance and longevity of the crucial automotive components. The heat generated during the operation of the transmission gears can cause the air inside the transmission housing to expand, potentially resulting in the increased pressure. Additionally, the interaction of transmission gears and shafts within the gearbox induces pressure through the meshing of gears and the circulation of transmission fluid. As the gears engage and disengage, they create turbulence in the fluid, leading to increased pressure. The breather circuit serves as a ventilation system that facilitates the exchange of air within the transmission housing. Thus, effectively pulverizing any pressure differential that could otherwise lead to inefficiencies or damage within the transmission system or gearbox. The breather circuit mitigates these risks by releasing the built-up pressure, thereby maintaining a balanced internal environment.
[0003] Additionally, the breather circuit enables the intake of fresh air, which is instrumental in preventing the accumulation of moisture and contaminants within the transmission system. This proactive approach safeguards against potential issues of seal damage and resultant leakage of the oil through the damaged seal.
[0004] However, the existing gearbox assembly still face a significant challenge as the oil, intended to be contained within the gearbox, continues to escape through the breather circuit due to pressure differentials. This issue raises concerns about lubrication efficiency and potential damage to the gearbox components. Moreover, the conflicting requirements of minimizing the amount of oil for reducing overall weight of the transmission system or gearbox while ensuring adequate lubrication for all gear arrangements within the gearbox propounds a complex engineering dilemma. Striking the right balance between reducing weight of oil while maintaining optimal lubrication is crucial for the overall performance and efficiency of the gearbox assembly.
[0005] Further, the need to make the gearbox assembly as compact as possible adds another layer of complexity to the challenging layouts of the transmission housing. Achieving a compact design while addressing oil leakage issues, reducing required amount of lubricant oil and maintaining lubrication standards requires innovative engineering solutions which is not available in the already known art. The transmission assembly and the transmission housing thereof, as disclosed in the present invention, successfully addresses the all the multifaceted challenges stated above.

SUMMARY OF THE INVENTION
[0006] The present subject matter relates to a transmission assembly for a vehicle. The transmission assembly comprises a transmission housing. The transmission housing is configured to enclose a plurality of transmission gears. The transmission housing comprises a breather circuit, and at least one deflecting member. The breather circuit is provided on an upper-most portion of an interior of the transmission housing. The breather circuit is provided with an inlet. The at least one deflecting member is disposed close the inlet of the breather circuit. The at least one deflecting member comprises a first surface. The first surface is configured to deflect splashed droplets of a lubricating fluid away from the inlet of the breather circuit.
[0007] The present subject matter also relates to a transmission housing for a vehicle. The transmission housing is configured to enclose a plurality of transmission gears. The transmission housing comprises a breather circuit, and at least one deflecting member. The breather circuit is provided on an upper-most portion of an interior of the transmission housing. The breather circuit is provided with an inlet. The at least one deflecting member is disposed close to the inlet of the breather circuit. The at least one deflecting member comprises a first surface. The first surface is configured to deflect splashed droplets of a lubricating fluid away from the inlet.

BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The details are described with reference to an embodiment of a transmission assembly, and a transmission housing. The same numbers are used throughout the drawings to refer similar features and components.
[0009] Figure 1 illustrates a side perspective view of the transmission assembly from a second side of the vehicle.
[0010] Figure 2 illustrates a side view of the first housing from an inner side of the first housing.
[0011] Figure 3 illustrates a side view of the second housing from an inner side of the second housing.
[0012] Figure 4 illustrates a flow of a lubricating fluid and a fluid-mixture in the first housing.
[0013] Figure 5 illustrates a flow of a lubricating fluid and a fluid-mixture in the second housing.
[0014] Figure 6a illustrates a side perspective view of the first housing.
[0015] Figure 6b illustrates a side perspective view of the second housing.

DETAILED DESCRIPTION
[0016] In order to overcome one or more of the above-mentioned challenges, the present invention discloses a transmission assembly and the transmission housing thereof. The disclosed embodiments of the present invention enhance the performance of the gearbox assembly and also contribute to the overall efficiency and reliability of the machinery in which the gearbox assembly is integrated into.
[0017] As per one embodiment of the invention, the invention relates to a transmission assembly for a vehicle. The transmission assembly comprises a transmission housing. The transmission housing is configured to enclose a plurality of transmission gears. The transmission housing comprises a breather circuit, and at least one deflecting member. The breather circuit is provided on an upper-most portion of an interior of the transmission housing. The breather circuit is provided with an inlet. The at least one deflecting member is disposed close to the inlet of the breather circuit. The at least one deflecting member comprises a first surface. The first surface is configured to deflect splashed droplets of a lubricating fluid away from the inlet of the breather circuit.
[0018] As per one embodiment of the invention, the first surface is provided with a pre-defined orientation along an axis A-A. The axis A-A is parallel to an axis B-B. The axis B-B passes through center of at least two of plurality of transmission gears.
[0019] As per one embodiment of the invention, the at least one deflecting member comprises at least one second surface. The at least one second surface is extended from at least one terminal of the first surface. The at least one second surface is configured to redirect the splashed droplets of the lubricating fluid towards the plurality of transmission gears and a lubricating fluid sump in order to screen the inlet against the splashed droplets of the lubricating fluid.
[0020] As per one embodiment of the invention, the at least one second surface is provided with a pre-defined orientation along an axis C-C. The axis C-C tangentially passes through one of the plurality of transmission gears. The one of the plurality of transmission gears is closest in proximity to the breather circuit.
[0021] As per one embodiment of the invention, the transmission housing comprises a first housing and a second housing. The first housing is configured to enclose a plurality of transmission gears from a first side of the vehicle. The second housing is configured to enclose a plurality of transmission gears from a second side of the vehicle.
[0022] As per one embodiment of the invention, the first housing comprises a first protrusion. The first protrusion is extended perpendicularly from an interior surface of the first housing. The second housing comprises a second protrusion. The second protrusion is extended perpendicularly from an interior surface of the second housing. A profile of the second protrusion is configured to conform with a profile of the first protrusion. The second protrusion is configured to conjoin with the first protrusion to achieve a coplanar alignment with respect to the first protrusion in order to form the at least one deflecting member.
[0023] As per one embodiment of the invention, a fluid-mixture is guided to the inlet from a gap. The gap is disposed between the at least one deflecting member and a wall of the transmission housing. The breather circuit comprises a plurality of baffles. The plurality of baffles is configured to guide the fluid-mixture from the inlet to an outlet. The plurality of baffles is configured to allow a condensation of vapors of the lubricating fluid simultaneously thereby separating the vapors of the lubricating fluid from an uncondensed fluid.
[0024] As per one embodiment of the invention, the outlet is provided on the first housing. The outlet is configured to transmit the uncondensed fluid to an exterior of the transmission housing by using a hose member. The hose member comprises a unidirectional valve. The unidirectional valve is configured to enable a passage of the uncondensed fluid from the interior of the transmission housing to the exterior of the transmission housing. The unidirectional valve is configured to restrict a passage of atmospheric air from the exterior of the transmission housing to the interior of the transmission housing.
[0025] As per one embodiment of the invention, a controller is configured to receive a signal from a pressure sensor in order to regulate an opening and a closing of the outlet. The pressure sensor is configured to detect a change in pressure in the interior of the transmission housing.
[0026] As per one embodiment of the invention, a cooling system is provided for an improved heat dissipation. The cooling system comprises a plurality of channels and a plurality of fins. The plurality of channels is a series of interconnected passages drilled inside the transmission housing. The plurality of channels is configured to circulate a coolant medium. The plurality of fins is provided on an outer surface of the transmission housing. The plurality of fins is configured to increase a surface area of outer surface of the transmission housing for the improved heat dissipation.
[0027] In another embodiment, the invention relates to a transmission housing for a vehicle. The transmission housing is configured to enclose a plurality of transmission gears. The transmission housing comprises a breather circuit, and at least one deflecting member. The breather circuit is provided on an upper-most portion of an interior of the transmission housing. The breather circuit is provided with an inlet. The at least one deflecting member is disposed close to the inlet of the breather circuit. The at least one deflecting member comprises a first surface. The closeness between the at least one deflecting member and the inlet is such that the first surface is configured to deflect splashed droplets of a lubricating fluid away from the inlet of the breather circuit.
[0028] As per another embodiment of the invention, the first surface is provided with a pre-defined orientation along an axis A-A. The axis A-A is parallel to an axis B-B. The axis B-B passes through a center of at least two of the plurality of transmission gears.
[0029] As per another embodiment of the invention, the transmission housing comprises a first housing and a second housing. The first housing is configured to enclose a plurality of transmission gears from a first side of the vehicle. The second housing is configured to enclose a plurality of transmission gears from a second side of the vehicle.
[0030] As per another embodiment of the invention, the first housing comprises a first protrusion. The first protrusion is extended perpendicularly from an interior surface of the first housing. The second housing comprises a second protrusion. The second protrusion is extended perpendicularly from an interior surface of the second housing. A profile of the second protrusion is configured to conform with a profile of the first protrusion. The second protrusion is configured to conjoin with the first protrusion to achieve a coplanar alignment with respect to the first protrusion in order to form the at least one deflecting member.
[0031] As per another embodiment of the invention, the at least one deflecting member comprises at least one second surface. The at least one second surface is extended from at least one terminal of the first surface. The at least one second surface is configured to redirect the splashed droplets of the lubricating fluid towards the plurality of transmission gears and a lubricating fluid sump in order to screen the inlet against the splashed droplets of the lubricating fluid.
[0032] As per another embodiment of the invention, the at least one second surface is provided with a pre-defined orientation along an axis C-C. The axis C-C tangentially passes through one of the plurality of transmission gears. The one of the plurality of transmission gears is closest in proximity to the breather circuit.
[0033] The embodiments of the present invention will now be described in detail with reference to an embodiment of a transmission assembly (100) and the transmission housing (200) thereof, along with the accompanying drawings. However, the disclosed invention is not limited to the present embodiments.
[0034] The embodiments shown in Figure 1 to Figure 3 are taken together for discussion. Figure 1 illustrates a side perspective view of the transmission assembly (100) from a second side of the vehicle. Figure 2 illustrates a side view of the first housing (201) from an inner side of the first housing (201). Figure 3 illustrates a side view of the second housing (202) from an inner side of the second housing (202).
[0035] One of the embodiments of disclosed invention relates to a transmission assembly (100) for a vehicle. The transmission assembly (100) comprises a transmission housing (200). The transmission housing (200) encloses a plurality of transmission gears (101). The plurality of transmission gears (101) is supported by a plurality of shafts. The plurality of shafts is received in a plurality of openings provided on the transmission housing (200). In a preferred embodiment, the transmission assembly (100) is a gear box which uses the plurality of transmission gears (101) in order to enable the user to control the torque and speed of the wheels during transmission of the power from the prime mover to the wheels. In another embodiment, the vehicle is an electric vehicle having a motor as sole prime mover. In yet another embodiment, the vehicle is a hybrid vehicle having the motor as one of the prime mover. The transmission assembly (100) can be provided with multiple gear ratios or single fixed gear ratio, depending upon the configuration of the vehicle.
[0036] The transmission housing (200) comprises a breather circuit (300), and at least one deflecting member (400). The breather circuit (300) is provided on an upper-most portion of an interior of the transmission housing (200) in order to capture the fluid-mixture, which tends to rise upon creation of the pressure differential. The breather circuit (300) is provided with an inlet (301). The inlet (301) allows an ingress of the rising fluid-mixture into the breather circuit (300). The fluid-mixture is combined blend of the air and vaporized lubricating fluid formed sue to the heat and turbulence caused the lubricating fluid due to interaction of various components in the transmission housing (200). The fluid-mixture, being less dense, rises to upper-most portion of an interior of the transmission housing (200) where the breather circuit (300) is disposed.
[0037] The at least one deflecting member (400) is disposed close to the inlet (301). In a preferred embodiment, the at least one deflecting member (400) is disposed distantly ahead of the inlet (301). The at least one deflecting member (400) lies in a front of the inlet (301) without interfacing or closing the inlet (301). The at least one deflecting member (400) and separated by an intervening space. The intervening space ensures an access of the rising fluid-mixture to the inlet (301). Therefore, the at least one deflecting member (400) and the inlet (301) are disposed distantly but in front each other. The at least one deflecting member (400) comprises a first surface (401).
[0038] The first surface (401) deflects splashed droplets of a lubricating fluid away from the inlet (301) of the breather circuit (300). The lubricating fluid reduces the friction, heat, and wear between mechanical components of the transmission assembly (100) that are in contact with each other. In a preferred embodiment, the lubricating fluid is a blend of low viscosity oil to allow for easy starting at cool temperatures and a high viscosity oil for better performance at normal running temperatures.
[0039] Therefore, the at least one deflecting member (400) ensures the access for the fluid-mixture to the breather circuit (300) while restricting the movement of the lubricating fluid. This configuration successfully eliminates any possibility of a leakage of the lubricating fluid though the breather circuit (300) while simultaneously pulverizing any pressure differential built in the transmission assembly (100). The amount of the lubricating fluid required for effective lubrication is also reduced as the wastage of the lubricating fluid due to leakage is eliminated. This further contributes to the compact layout and reduction in weight of the transmission assembly (100). Thus, the compact layout of the transmission assembly (100) contributes to sufficient ground clearance in the vehicle.
[0040] In a preferred embodiment, the one or more components of the transmission assembly (100) like plurality of shafts, plurality of transmission gears (101) and an interior of the transmission housing (200) are coated with a smart tribological coating using a thin film of self-lubricating materials. The self-lubricating materials are solid lubricant which improve frictional properties of surfaces. The self-lubricating materials include, but not limited to, graphite, Molybdenum Disulfide (MoS2), hex boron Nitride (hBN), and Polytetrafluoroethylene (PTFE). The smart tribological coating minimizes the excessive dependence on the lubricating fluid while still ensuring effective lubrication during operation. This innovation not only reduces the weight of the transmission assembly (100) but also enhances its efficiency and durability.
[0041] The embodiments shown in Figure 4 and Figure 5 are taken together for discussion. Figure 4 illustrates a flow of a lubricating fluid and a fluid-mixture in the first housing (201). Figure 5 illustrates a flow of a lubricating fluid and a fluid-mixture in the second housing (202).
[0042] The first surface (401) is provided with a pre-defined orientation along an axis A-A. The axis A-A passes through the first surface (401) along a longitudinal direction of the first surface (401) and is parallelly disposed to an axis B-B. The axis B-B passes through a center of at least two of the plurality of transmission gears (101). This configuration ensures that the lubricating fluid splashed by plurality of transmission gears (101) towards the inlet (301) falls on the first surface (401) thereby offering maximum utilization of a surface area of the first surface (401).
[0043] The at least one deflecting member (400) can be in the form of “S” or “L” “V” or “C” or “inverted V”. The at least one deflecting member (400) comprises at least one second surface (402). The at least one second surface (402) extends from at least one terminal of the first surface (401). The at least one second surface (402) is provided with a pre-defined orientation along an axis C-C. The axis C-C tangentially passes through one of the plurality of transmission gears (101). The one of the plurality of transmission gears (101) is closest in a proximity to the breather circuit (300), accordingly, the deflecting member (400) is disposed in front of the inlet (301) but not interfacing the inlet (301) due to distance between them. The at least one second surface (402) redirects the splashed droplets of the lubricating fluid towards the plurality of transmission gears (101) and a lubricating fluid sump (103) in order to screen the inlet (301) against the splashed droplets of the lubricating fluid. This ensures that the lubricating fluid splashed by plurality of transmission gears (101) towards the inlet (301) is deflected back to the plurality of transmission gears (101) resulting in lubrication of the plurality of transmission gears (101) without using any additional component. The lubricating fluid is redirected to the lubricating fluid sump (103) in order to further restrict the ingress of the lubricating fluid in to the breather circuit (300). The lubricating fluid sump (103) is a low space disposed at a bottom of the transmission housing (200). The lubricating fluid sump (103) collects the lubricating fluid when it is not circulating in the transmission assembly (100). The breather circuit (300) is disposed toward an up direction and the lubricating fluid sump (103) is disposed toward a down direction when the transmission housing (200) is placed in an up-right orientation. The up direction and the down direction are indicated by an axis Up-Down in the Figure 4 and Figure 5.
[0044] The fluid-mixture is a mixture of air and vapors of the lubricating fluid. The fluid-mixture is guided to the inlet (301) from a gap (304, shown in Fig. 6a). The gap (304) is disposed between the at least one deflecting member (400) and a wall of the transmission housing (200).
[0045] The breather circuit (300) is a key feature designed to facilitate a controlled exchange of air, and to prevent pressure imbalances within the transmission assembly (100). The breather circuit (300) comprises a plurality of baffles (302). The plurality of baffles (302) guides the fluid-mixture from the inlet (301) to an outlet (303). The plurality of baffles (302) allows a simultaneous condensation of vapors of the lubricating fluid thereby separating the vapors of the lubricating fluid from an uncondensed fluid, which is air.
[0046] An outlet (303) is provided on the first housing (201). The outlet (303) transmits the uncondensed fluid to an exterior of the transmission housing (200) by using a hose member (102). The hose member (102) comprises a unidirectional valve. The unidirectional valve enables a passage of the uncondensed fluid from the interior of the transmission housing (200) to the exterior of the transmission housing (200). The unidirectional valve restricts a passage of atmospheric air from the exterior of the transmission housing (200) to the interior of the transmission housing (200).
[0047] The transmission assembly (100) comprises a controller which regulates an opening and a closing of the outlet (303) based upon a signal received from a pressure sensor. In a preferred embodiment, the controller is an Electronic Control Unit (ECU). The pressure sensor detects a change in pressure in the interior of the transmission housing (200). This ensures that the outlet (303) is open only when there this a need to purge the pressure developed in the interior of the transmission housing (200). Further, it provided necessary control over the passage of the uncondensed fluid and puts a check over an escape of the lubricating fluid in a vapor form. By dynamically regulating the pressure release, this embodiment ensures optimal pressure conditions within the transmission housing (200), contributing to more precise lubrication and further preventing the risk of pressure-related issues.
[0048] The transmission assembly (100) comprises a cooling system for an improved heat dissipation. The cooling system comprises a plurality of channels and a plurality of fins. The plurality of channels is a series of interconnected passages drilled inside the transmission housing (200). The plurality of channels circulates a coolant medium. In a preferred embodiment, the coolant medium and the lubricating fluid are same. The plurality of fins is provided on an outer surface of the transmission housing (200). The plurality of fins increases a surface area of the outer surface of the transmission housing (200) for the improved heat dissipation.
[0049] The embodiments shown in Figure 6a and Figure 6b are taken together for discussion. Figure 6a illustrates a side perspective view of the first housing (201). Figure 6b illustrates a side perspective view of the second housing (202).
[0050] In another embodiment, the invention relates to a transmission housing (200) for a vehicle. The transmission housing (200) encloses a plurality of transmission gears (101). The transmission housing (200) comprises a breather circuit (300), and at least one deflecting member (400). The breather circuit (300) is provided on an upper-most portion of an interior of the transmission housing (200). The breather circuit (300) is provided with an inlet (301). The at least one deflecting member (400) is disposed close to the inlet (301). In a preferred embodiment, the at least one deflecting member (400) is disposed distantly ahead of the inlet (301) of the breather circuit (300). The at least one deflecting member (400) comprises a first surface (401). The first surface (401) deflects splashed droplets of a lubricating fluid away from the inlet (301) of the breather circuit (300).
[0051] The transmission housing (200) comprises a first housing (201) and a second housing (202). The first housing (201) encloses a plurality of transmission gears (101) from a first side of the vehicle. The second housing (202) encloses the plurality of transmission gears (101) from a second side of the vehicle. In a preferred embodiment, the first side of the vehicle is the left side whereby the first housing (201) is disposed on the left-side of the vehicle in order to cover the plurality of transmission gears (101) from the left side of the vehicle. In the same preferred embodiment, the second side is the right side of the vehicle whereby the second housing (202) is disposed on a right-side of the vehicle in order to cover the plurality of transmission gears (101) from the right side of the vehicle. In this embodiment, the right-side of the vehicle and left-side of the vehicle are in respect of a user of the vehicle facing towards the direction of forward motion of the vehicle. The left direction and right direction are indicated using axis Left-Right (L-R) in Figure 1. In a preferred embodiment, the first housing (201) and the second housing (202) are made from aluminium or aluminium alloys. The thermal and vibrational characteristics of aluminum alloys are similar to cast iron materials. However, lighter weight of the aluminum alloys makes them proper materials for vehicular applications. In another embodiment, the first housing (201) and the second housing (202) are made from carbon fiber-reinforced composites. This not only reduces the overall weight of the transmission assembly (100) but also improves its structural integrity and thermal performance, contributing to increased energy efficiency and longevity.
[0052] The first housing (201) comprises a first protrusion (400A). The first protrusion (400A) extends perpendicularly from an interior surface of the first housing (201). The second housing (202) comprises a second protrusion (400B). The second protrusion (400B) extends perpendicularly from an interior surface of the second housing (202). A profile of the second protrusion (400B) conforms with a profile of the first protrusion (400A). The second protrusion (400B) conjoins with the first protrusion (400A) to achieve a coplanar alignment with respect to the first protrusion (400A). This alignment forms the at least one deflecting member (400). In a preferred embodiment, the first protrusion (400A) and the second protrusion (400B) are integrally formed in the first housing (201) and the second housing (202) respectively.
[0053] The disclosed embodiments of the present invention successfully prevent an escape of the lubricating fluid out of the transmission housing (200) through the breather circuit (300) thereby preventing potential fluid leakages. The amount of the lubricating fluid required for effective lubrication is also reduced as the wastage of the lubricating fluid due to leakage is eliminated.
[0054] The disclosed embodiments of the present invention enhance overall performance and the durability of the transmission assembly (100) by ensuring proper lubrication of various components of the transmission assembly (100) and prevents unwanted pressure accumulation in the transmission housing (200) by dynamically regulating the pressure release. Thus, safeguarding against performance issues that may arise due to improper lubrication and pressure imbalances within the transmission housing (200).
[0055] Further, the disclosed embodiments of the present invention contribute to compact layout and reduction in weight of the transmission housing (200) with improved structural integrity and thermal performance.
[0056] The present disclosed invention relates to a transmission assembly (100) and a transmission housing (200) thereof. Embodiments illustrated in the present invention can be worked with any two-wheeled vehicles, three-wheeled vehicles, four-wheeled vehicles, all-terrain vehicles (ATVs) and off-road vehicles using transmission assembly (100). Further, the disclosed invention is not limited to the aforementioned embodiments. For example, as used in this specification and the appended claims, the singular forms “a,” “an” and “they” can include plural referents unless the content clearly indicates otherwise. Further, when introducing elements/components/etc. of the assembly/system described and/or illustrated herein, the articles “a”, “an”, “the”, and “said” are intended to mean that there is one or more of the element(s)/component(s)/etc. The terms “comprising”, “including”, and “having” are intended to be inclusive and mean that there may be additional element(s)/component(s)/etc. other than the listed element(s)/component(s)/etc.
[0057] This written description uses examples to provide details on the disclosure, including the best mode, and also to enable any person skilled in the art to practice the disclosure, including making and using any devices or systems. The scope of the disclosure is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
[0058] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure.

LIST OF REFERENCE NUMERALS

100
101
102
103
200
201
202
300
301
302
303
304
400
400A
400B
401
402

Transmission Assembly
Transmission Gears
Hose Member
Lubricating Fluid Sump
Transmission Housing
First Housing
Second Housing
Breather Circuit
Inlet
Plurality Of Baffles
Outlet
Gap
At least one Deflecting Member
First Protrusion
Second Protrusion
First Surface
At least one Second Surface

, Claims:We Claim:
1. A transmission assembly (100) for a vehicle, the transmission assembly (100) comprising:
a transmission housing (200), the transmission housing (200) being configured to enclose a plurality of transmission gears (101), the transmission housing (200) comprising:
a breather circuit (300), the breather circuit (300) being provided on an upper-most portion of an interior of the transmission housing (200), the breather circuit (300) being provided with an inlet (301); and
at least one deflecting member (400), the at least one deflecting member (400) being disposed close to the inlet (301) of the breather circuit (300), the at least one deflecting member (400) comprising a first surface (401), the first surface (401) being configured to deflect splashed droplets of a lubricating fluid away from the inlet (301) of the breather circuit (300).
2. The transmission assembly (100) for the vehicle as claimed in claim 1, wherein the first surface (401) being provided with a pre-defined orientation along an axis A-A, the axis A-A being parallel to an axis B-B, the axis B-B passing through a center of at least two of the plurality of transmission gears (101).
3. The transmission assembly (100) for the vehicle as claimed in claim 1, wherein the at least one deflecting member (400) comprises at least one second surface (402), the at least one second surface (402) being extended from at least one terminal of the first surface (401), the at least one second surface (402) being configured to redirect the splashed droplets of the lubricating fluid towards the plurality of transmission gears (101) and a lubricating fluid sump (103) in order to screen the inlet (301) against the splashed droplets of the lubricating fluid.
4. The transmission assembly (100) for the vehicle as claimed in claim 3, wherein the at least one second surface (402) being provided with a pre-defined orientation along an axis C-C, the axis C-C tangentially passing through one of the plurality of transmission gears (101), the one of the plurality of transmission gears (101) is closest in proximity to the breather circuit (300).
5. The transmission assembly (100) for the vehicle as claimed in claim 1, wherein the transmission housing (200) comprises a first housing (201) and a second housing (202), the first housing (201) being configured to enclose the plurality of transmission gears (101) from a first side of the vehicle, the second housing (202) being configured to enclose the plurality of transmission gears (101) from a second side of the vehicle.
6. The transmission assembly (100) for the vehicle as claimed in claim 5, wherein the first housing (201) comprises a first protrusion (400A), the first protrusion (400A) being extended perpendicularly from an interior surface of the first housing (201); the second housing (202) comprises a second protrusion (400B), the second protrusion (400B) being extended perpendicularly from an interior surface of the second housing (202); a profile of the second protrusion (400B) being configured to conform with a profile of the first protrusion (400A), the second protrusion (400B) being configured to conjoin with the first protrusion (400A) to achieve a coplanar alignment with respect to the first protrusion (400A) in order to form the at least one deflecting member (400).
7. The transmission assembly (100) for the vehicle as claimed in claim 1, wherein a gap (304) being disposed between the at least one deflecting member (400) and a wall of the transmission housing (200), the gap (304) being configured to allow a fluid-mixture being guided to the inlet (301), the fluid-mixture being a mixture of the lubricating fluid and air; the breather circuit (300) comprises a plurality of baffles (302), the plurality of baffles (302) being configured to guide the fluid-mixture from the inlet (301) to an outlet (303) of the breather circuit (300), and the plurality of baffles (302) being configured to allow a condensation of vapors of the lubricating fluid simultaneously thereby separating the vapors of the lubricating fluid from an uncondensed fluid.
8. The transmission assembly (100) for the vehicle as claimed in claim 6, wherein the outlet (303) being provided on the first housing (201), the outlet (303) being configured to transmit the uncondensed fluid to an exterior of the transmission housing (200) by using a hose member (102), the hose member (102) comprises a unidirectional valve, the unidirectional valve being configured to enable a passage of the uncondensed fluid from the interior of the transmission housing (200) to the exterior of the transmission housing (200) and the unidirectional valve being configured to restrict a passage of atmospheric air from the exterior of the transmission housing (200) to the interior of the transmission housing (200).
9. The transmission assembly (100) for the vehicle as claimed in claim 6, wherein a controller being configured to receive a signal from a pressure sensor to regulate an opening and a closing of the outlet (303), the pressure sensor being configured to detect a change in pressure in the interior of the transmission housing (200).
10. The transmission assembly (100) for the vehicle as claimed in claim 1, wherein a cooling system is provided for heat dissipation, the cooling system comprises a plurality of channels and a plurality of fins, the plurality of channels being a series of interconnected passages drilled inside the transmission housing (200), the plurality of channels being configured to circulate a coolant medium; the plurality of fins being provided on an outer surface of the transmission housing (200), the plurality of fins being configured to increase a surface area of the outer surface of the transmission housing (200) for the heat dissipation.
11. A transmission housing (200) for a vehicle, the transmission housing (200) comprising:
a breather circuit (300), the breather circuit (300) being provided on an upper-most portion of an interior of the transmission housing (200), the breather circuit (300) being provided with an inlet (301); and
at least one deflecting member (400), the at least one deflecting member (400) being disposed close to the inlet (301) of the breather circuit (300), the at least one deflecting member (400) comprising:
a first surface (401), the first surface (401) being configured to deflect splashed droplets of a lubricating fluid away from the inlet (301).
12. The transmission housing (200) for the vehicle as claimed in claim 11, the first surface (401) being provided with a pre-defined orientation along an axis A-A, the axis A-A is parallel to an axis B-B, the axis B-B passing through a center of at least two of the plurality of transmission gears (101).
13. The transmission housing (200) for the vehicle as claimed in claim 11, wherein the transmission housing (200) comprises a first housing (201) and a second housing (202), the first housing (201) being configured to enclose the plurality of transmission gears (101) from a first side of the vehicle, the second housing (202) being configured to enclose the plurality of transmission gears (101) from a second side of the vehicle; and the first housing (201) comprises a first protrusion (400A), the first protrusion (400A) being extended perpendicularly from an interior surface of the first housing (201); the second housing (202) comprises a second protrusion (400B), the second protrusion (400B) being extended perpendicularly from an interior surface of the second housing (202); a profile of the second protrusion (400B) being configured to conform with a profile of the first protrusion (400A), the second protrusion (400B) being configured to conjoin with the first protrusion (400A) to achieve a coplanar alignment with respect to the first protrusion (400A) in order to form the at least one deflecting member (400).
14. The transmission housing (200) for the vehicle as claimed in claim 11, wherein the at least one deflecting member (400) comprises at least one second surface (402), the at least one second surface (402) being extended from at least one terminal of the first surface (401), the at least one second surface (402) being configured to redirect the splashed droplets of the lubricating fluid towards the plurality of transmission gears (101) and a lubricating fluid sump (103) in order to screen the inlet (301) against the splashed droplets of the lubricating fluid; and the at least one second surface (402) being provided with a pre-defined orientation along an axis C-C, the axis C-C tangentially passing through one of the plurality of transmission gears (101), the one of the plurality of transmission gears (101) is closest in proximity to the breather circuit (300).

Dated this 05th day of February, 2024

(Digitally Signed)
Sudarshan Singh Shekhawat
IN/PA-1611
Agent for the Applicant