Wet clutch of hydraulic mechanical transmission for vehicle and vehicle

Abstract

The invention discloses a wet clutch of a hydraulic mechanical transmission for a vehicle and the vehicle, and belongs to the technical field of vehicle clutches, the wet clutch comprises a turbine shaft, the left end of the turbine shaft can be connected to a hydraulic torque converter, the right end of the turbine shaft is provided with a transmission part, the transmission part can be connected to a mechanical gearbox, and the transmission part comprises a clutch outer hub; the clutch outer hub is connected to the turbine shaft in a sleeving mode, and a piston, a friction plate, a dual plate and an output gear are sequentially arranged on the clutch outer hub in the transmission direction. The piston can be controlled by oil pressure to move rightwards so as to press the dual plate and the friction plate; the piston is further provided with a spring set, and the spring set is used for resetting the piston. The wet clutch is provided with a lubricating system and an oil pressure system, and the oil pressure system is provided with a proportional electromagnetic valve. A dry clutch can be replaced at the same position, the axial size is smaller than that of the dry clutch, the chassis space is saved, the torque requirement within a certain range is met, the cost is reduced, gear shifting is more stable and smooth, and the driving experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle clutches, and particularly relates to a wet clutch for a hydrodynamic mechanical transmission of a vehicle and a vehicle. Background Art

[0002] Large-tonnage off-road vehicles such as large mining trucks and special vehicles require a large amount of torque when starting or going uphill. It is very difficult to complete the operation quickly under such special working conditions solely relying on the torque provided by the engine. Therefore, a torque converter needs to be installed on the vehicle to increase the starting torque of the vehicle. When the vehicle starts or goes uphill, the torque converter amplifies the torque, and at this time, the torque that the clutch needs to transmit also increases accordingly, which places relatively high requirements on the clutch.

[0003] Currently, most of such large-tonnage off-road vehicles are equipped with dry clutches. Such clutches have relatively high requirements for the friction performance of the friction material. It is necessary to pay attention to protecting the friction material during assembly and use to prevent contact with liquid, otherwise it will cause the clutch to burn out; moreover, a fork structure and a clutch pump need to be designed to control the separation and engagement of the clutch, making the gearbox structure complex. In situations such as high-altitude areas where the air pressure in the cylinder may be unstable, and in cold areas where the condensed water in the air pipe may freeze. Therefore, for current large-tonnage off-road vehicles, due to the unreasonable design of the clutch, the gearbox structure is relatively complex and prone to problems of unstable operation in environments such as low pressure and low temperature. Summary of the Invention

[0004] The present invention provides a wet clutch for a hydrodynamic mechanical transmission of a vehicle and a vehicle, aiming to solve the problem that for current large-tonnage off-road vehicles, due to the unreasonable design of the clutch, the gearbox structure is relatively complex and prone to problems of unstable operation in environments such as low pressure and low temperature.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a wet clutch for a hydrodynamic mechanical transmission of a vehicle, including a turbine shaft. The left end of the turbine shaft can be connected to a torque converter, and the right end is provided with a transmission part. The transmission part can be connected to a mechanical gearbox to transmit the torque of the torque converter to the mechanical gearbox; wherein: The transmission part includes a clutch outer hub sleeved on the turbine shaft. The clutch outer hub is sequentially provided with a piston, friction plates, counter plates, and an output gear along the transmission direction; The piston can be controlled to move rightward by oil pressure to press the counter plates and friction plates; the piston is also provided with a spring group for resetting the piston; The wet clutch has a lubrication system and a hydraulic pressure system. The hydraulic pressure system is configured with a proportional solenoid valve, which is used to control the on / off of the hydraulic pressure system to regulate the movement of the piston; the lubrication system is used to lubricate the wet clutch.

[0006] In some embodiments, the inner ring of the clutch outer hub is provided with an internal spline on the first part along its axial direction and a smooth hole on the second part. The first part is used to engage with the mating plate, and the second part is used to cooperate with the seal of the piston.

[0007] Furthermore, it also includes a clutch end cover. The outer edge of the clutch outer hub is set as a boss, and the boss is provided with a threaded hole. The clutch end cover and the clutch outer hub are connected by a bolt group.

[0008] Furthermore, oil holes are provided at the meshing part of the clutch outer hub and the mating plate to enable the lubricating oil to circulate in the lubrication system.

[0009] Furthermore, the left end of the output gear is connected to the turbine shaft through a first needle bearing, and the right end is connected to the clutch end cover through a second needle bearing.

[0010] In some embodiments, the wet clutch is provided with a lubricating oil passage and a pressure oil passage corresponding to the lubrication system and the hydraulic pressure system. There is one pressure oil passage, and there are two lubricating oil passages along the axial direction of the clutch outer hub. The lubricating oil passages have an inclination angle at the part entering the transmission part.

[0011] In some embodiments, the spring group includes an outer ring spring group and an inner ring spring group. The outer ring spring group is assembled to the clutch outer hub through a first retaining ring and a baffle, and the inner ring spring group is assembled to the clutch outer hub through a second retaining ring and a clamping plate.

[0012] In some embodiments, the outer ring of the piston is sealed with the clutch outer hub through a first sealing ring, and the inner ring of the piston is sealed with the turbine shaft through a second sealing ring.

[0013] In some embodiments, both the lubrication system and the hydraulic pressure system are configured with plugs, and the plugs are located near the right end of the turbine shaft.

[0014] The present invention also provides a vehicle, which includes the wet clutch of the above-mentioned hydrodynamic mechanical transmission for vehicles.

[0015] Compared with the prior art, the wet clutch and the vehicle of the hydrodynamic mechanical transmission for vehicles of the present invention have the following beneficial effects: The wet clutch of a hydrodynamic mechanical transmission for vehicles of the present invention provides a wet clutch, which is part of the TCC front module. The front end of the wet clutch is connected to the torque converter, and the rear end is connected to the mechanical transmission. The present invention cancels the fork and clutch pump structures of the dry clutch, and instead uses the oil of the torque converter itself for driving and lubrication, simplifying the transmission structure. The present invention can replace the dry clutch in the same position, and its axial dimension is smaller than that of the dry clutch, saving chassis space; the number of springs in the inner ring spring group can be adjusted to meet the torque requirements within a certain range. By canceling the clutch slave cylinder and clutch master cylinder of the whole vehicle, the present invention reduces the cost and simplifies the structure; uses a proportional solenoid valve to control the engagement and separation of the clutch, making the shifting more smooth and improving the driving experience, having better practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings of the specification are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0017] Figure 1 It is a schematic structural diagram of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention and the wet clutch in the vehicle; Figure 2 It is a schematic structural diagram of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention and the pressure oil passage and lubricating oil passage in the vehicle; Figure 3 It is a schematic structural diagram of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention and the clutch outer hub in the vehicle; Figure 4 It is a schematic diagram of the position of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention in the assembly; Figure 5 It is a schematic structural diagram of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention and the retarder housing in the vehicle; Figure 6 It is a schematic diagram of the hydraulic principle of the wet clutch of the hydrodynamic mechanical transmission for vehicles of the present invention and the vehicle.

[0018] Reference numerals: 1, turbine shaft; 2, friction plate; 3, mating plate; 4, plug; 5, baffle; 6, first sealing ring; 7, outer ring spring group; 8, inner ring spring group; 9, first needle roller bearing; 10, second needle roller bearing; 11, first snap ring; 12, second sealing ring; 13, clutch outer hub; 14, piston; 15, output gear; 16, clutch end cover; 17, retaining plate; 18, second snap ring; 19, bolt; 20, hydraulic torque converter; 21, mechanical transmission; 22, transmission input shaft; 23, clutch housing; 24, retarder housing; 25, lubricating oil passage; 26, pressure oil passage. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged in various different configurations.

[0020] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0021] Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the products of the invention are customarily placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0023] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0024] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected", and "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] How to simplify the structure of the transmission and the whole vehicle by using the oil fluid of the torque converter itself as drive and lubrication, and improve the driving experience on the basis of ensuring stability.

[0026] Based on the above, as Figures 1 - 3 shown, a wet clutch of a hydro-mechanical transmission for a vehicle according to the present invention includes a turbine shaft 1. The left end of the turbine shaft 1 can be connected to a torque converter, and the right end is provided with a transmission part. The transmission part can be connected to a mechanical transmission so as to transmit the torque of the torque converter to the mechanical transmission; wherein: The transmission part includes a clutch outer hub 13. The clutch outer hub 13 is sleeved on the turbine shaft 1. Along the transmission direction, a piston 14, a friction plate 2, a mating plate 3, and an output gear 15 are sequentially arranged on the clutch outer hub 13; The piston 14 can be controlled to move rightward by oil pressure to press the mating plate 3 and the friction plate 2 tightly; the piston 14 is also provided with a spring group for resetting the piston 14; The wet clutch has a lubrication system and an oil pressure system. The oil pressure system is provided with a proportional solenoid valve for controlling the on-off of the oil pressure system to adjust the movement of the piston 14; the lubrication system is used to lubricate the wet clutch.

[0027] The wet clutch of a hydro-mechanical transmission for a vehicle according to the present invention effectively transmits the torque of the torque converter to the mechanical transmission through the turbine shaft 1, ensuring the continuity and efficiency of power transmission. The piston 14 can be controlled to move rightward by oil pressure, thereby pressing the mating plate 3 and the friction plate 2 tightly to achieve the engagement of the clutch. The proportional solenoid valve configured in the oil pressure system can precisely control the on-off of the oil pressure system, and further adjust the movement of the piston 14 to provide flexible clutch control. The piston 14 is provided with a spring group to reset the piston 14 after the oil pressure is released, which helps the quick and smooth separation of the clutch. The lubrication system of the wet clutch can ensure the sufficient lubrication of each component inside the clutch, reduce wear and friction. Through the arrangement of the lubricating oil passage 25 and the pressure oil passage 26, the integration of the oil pressure control and lubrication functions is realized, simplifying the structure. The piston 14 and the clutch outer hub 13 are sealed by a sealing ring to ensure the stability of the oil pressure system and the effectiveness of the lubrication system.

[0028] In some embodiments, in the wet clutch of the hydraulic-mechanical transmission for vehicles according to the present invention, the inner ring of the clutch outer hub 13 is divided into two parts: an internal spline and a smooth hole. The internal spline is used to engage the counter plate 3, and the smooth hole is used to cooperate with the seal of the piston 14 to ensure that the working fluid does not leak, improving the sealing performance of the clutch. Through the arrangement of the internal spline and the smooth hole, the assembly process of the counter plate 3 and the piston 14 is simplified.

[0029] In some embodiments, in the wet clutch of the hydraulic-mechanical transmission for vehicles according to the present invention, oil holes are provided at the meshing part of the clutch outer hub 13 and the counter plate 3 to ensure that the lubricating fluid can smoothly enter the contact surface between the friction plate 2 and the counter plate 3, improving the lubrication effect. Through the circulating design of the lubrication system, the lubricating fluid can flow back to the oil sump in time, avoiding the overheating problem caused by the retention of the fluid and extending the service life of the clutch.

[0030] Furthermore, in the wet clutch of the hydraulic-mechanical transmission for vehicles according to the present invention, the lubricating oil passages 25 are designed as two and have an inclination angle, which can effectively prevent the lubricating fluid from being blocked by the piston 14 and the output gear 15 during the flow process, ensuring that the lubricating fluid can smoothly reach the contact surface between the friction plate 2 and the counter plate 3, improving the lubrication efficiency. And, the pressure oil passage 26 of the present invention is designed as a single oil passage and is arranged at 90° to the lubricating oil passage 25, optimizing the spatial layout, reducing the axial dimension of the clutch, and saving the chassis space.

[0031] In addition, for the wet clutch of the hydraulic-mechanical transmission for vehicles according to the present invention, in the installed state, through the cooperation of the clutch housing 23 and the bearing cover of the transmission input shaft 22, it is ensured that the fluid of the lubrication system does not penetrate into the mechanical transmission 21, improving the sealing performance of the lubrication system. The retarder housing 24 is provided with a lubricating oil passage, which can introduce the fluid of the torque converter into the lubrication system to ensure that the clutch is always in a good lubricated state during operation, reducing the frictional loss and heat accumulation.

[0032] The following further details a wet clutch and a vehicle of a hydraulic-mechanical transmission for vehicles according to the present invention through specific embodiments.

[0033] As Figure 2 shown, in the wet clutch of the hydraulic-mechanical transmission for vehicles according to the present invention, the turbine shaft 1 is welded and fixedly connected to the clutch outer hub 13. The turbine shaft 1 transmits the torque of the torque converter to the clutch outer hub 13. The pressure oil passage and the lubricating oil passage of the wet clutch are designed inside the turbine shaft 1, and the ends of the oil passages are blocked by plugs 4.

[0034] As a preference, in order to improve the lubrication efficiency of the present invention, two lubricating oil passages 25 are designed on the turbine shaft and arranged at 180°. In order to further improve the lubrication efficiency, the outlet of the lubricating oil passage is designed at a certain angle to maximize the avoidance of interference between the piston 14 and the output gear 15, so that the lubricating oil can smoothly reach the counter plate and the friction plate after leaving the oil passage; the pressure oil passage 26 is designed as a single oil passage and arranged at 90° with the plane formed by the two lubricating oil passages. The outlet of the pressure oil passage 26 is designed at the fillet to save space for the movement of the piston, thereby reducing the overall axial dimension of the clutch assembly. A hole is left at the right end face of the turbine shaft for assembling the shaft head and bearing of the mechanical transmission.

[0035] In the wet clutch of the hydraulic-mechanical transmission for vehicles of the present invention, the working oil reaches the pressure oil passage 26 of the turbine shaft 1 through the torque converter housing and the oil distribution plate at the torque converter end, and a proportional solenoid valve is used to control the on-off of the pressure oil; the lubricating oil of the clutch enters the lubricating oil passage of the turbine shaft 1 through the oil pipe and the oil passage on the retarder housing.

[0036] As Figure 3 As shown, the right half of the clutch outer hub 13 of the present invention needs to transmit the torque of the turbine shaft to the counter plate 3, so the right half of the clutch outer hub is designed as an internal spline; the clutch outer hub also needs to cooperate with the piston to seal the working oil, so the left half is designed as a smooth hole. A snap ring groove is designed on the inner ring of the clutch outer hub for assembling the snap ring. A boss structure is designed on the right end face, and a threaded hole is machined on the boss. Twelve bolts are used to connect the clutch end cover 16 and the clutch outer hub 13. Oil holes are designed at the meshing part of the clutch outer hub 13 and the counter plate 3 to ensure that the lubricating oil can smoothly return to the oil sump.

[0037] In the present invention, the outer ring of the piston 14 is sealed with the first sealing ring 6 between it and the clutch outer hub 13, and the inner ring is sealed with the second sealing ring 12 between it and the turbine shaft 1. The piston 14 moves to the right under the action of the working oil pressure, compresses the counter plate 3 and the friction plate 2 through the annular boss, and reinforcing ribs are designed to improve the strength and stiffness of the boss, thereby enhancing the stability of the overall structure.

[0038] Further preferably, in order to shorten the axial dimension of the wet clutch of the hydraulic-mechanical transmission for vehicles of the present invention, the outer ring spring group 7 and the inner ring spring group 8 are used to jointly push the piston 14 back to its original position. The outer ring spring group 7 consists of a total of twenty small springs in one circle and is assembled on the clutch outer hub 13 through the first snap ring 11 and the baffle 5; the inner ring spring group 8 consists of a total of twenty small springs in two circles and is assembled on the turbine shaft 1 through the second snap ring 18 and the clamping plate 17. The springs of each spring group are installed on the spring seat ring, and the elastic force is transmitted to the piston 14 through the spring seat ring, making the force on the piston 14 more uniform and also facilitating assembly. For the inner ring spring group 8, the number of springs can be increased or decreased by changing the outer diameter of the spring seat ring during design to meet the needs of different torques.

[0039] The outer ring gear of the output gear 15 of the present invention meshes with the friction plate group, and the inner ring spline cooperates with the shaft head of the mechanical transmission 21. The left and right ends of the output gear 15 are axially positioned by needle bearings. The left end contacts the turbine shaft 1 through the first needle bearing 9, and the right end contacts the clutch end cover 16 through the second needle bearing 10.

[0040] As Figure 4 and Figure 5 shown, the wet clutch of the hydraulic-mechanical transmission for vehicles of the present invention is connected to the hydraulic torque converter 20 at the front end and the mechanical transmission 21 at the rear end. In order to prevent the oil of the wet clutch from entering the mechanical transmission 21, a clutch housing 23 is designed, and an oil seal is assembled between the clutch housing and the transmission input shaft 22. The oil in the clutch returns to the oil sump through the oil return hole on the retarder housing 24.

[0041] The present invention also provides a vehicle, which includes the wet clutch of the hydraulic-mechanical transmission for vehicles of the present invention. By adopting the wet clutch of the present invention, it is expected to improve the stability of the vehicle's transmission system and transmission, simplify the structure of the transmission, and thus improve the performance of the whole vehicle.

[0042] The following further details the principle and application method of the wet clutch of the hydraulic-mechanical transmission for vehicles of the present invention in actual working conditions through specific embodiments.

[0043] As Figure 6 shown, when the vehicle is driving normally, the hydraulic torque converter 20 transmits torque to the turbine shaft 1. Since the turbine shaft 1 and the clutch outer hub 13 are welded and fixed, and the clutch outer hub 13 and the pair of plates 3 are meshed through splines, the torque is transmitted to the pair of plates 3. At this time, the proportional solenoid valve is in the open state, and the working oil reaches the cavity on the left side of the piston 14 through the working oil passage of the turbine shaft 1. The oil overcomes the spring force under the action of the oil pressure and pushes the piston 14 to move to the right. At this time, the friction plate 2 and the pair of plates 3 are pressed together, and the torque is transmitted from the pair of plates 3 to the friction plate 2. The friction plate 2 and the output gear 15 are meshed through splines, and the output gear 15 and the transmission input shaft 22 are meshed through splines, and the power is transmitted to the transmission.

[0044] When the vehicle needs to shift gears, the solenoid valve closes, and the oil pressure in the working oil passage immediately decreases. At this time, the pressure of the oil acting on the piston 14 also decreases accordingly. The piston 14 moves to the left under the action of the spring force, and the pressed friction plate 2 and the pair of plates 3 are separated, and the torque transmission is interrupted at the friction plate 2 and the pair of plates 3. When the vehicle completes the gear shift, the solenoid valve opens, and the piston 14 will be pushed by the oil pressure to press the pair of plates 3 and the friction plate 2 again to continue transmitting power.

[0045] If a manual transmission such as an MT is installed at the right end of the clutch, the vehicle cab no longer requires a clutch pedal, and only a switch for controlling a proportional solenoid valve is needed to control the on / off of the clutch; if an automated mechanical transmission (AMT) or other automatic transmission is installed, the clutch control function can also be directly integrated into the controller.

[0046] The lubrication method of the wet clutch of the hydrodynamic mechanical transmission for vehicles in the present invention adopts forced lubrication. After the vehicle starts, the oil in the torque converter 20 begins to circulate. In the present invention, a part of the oil that has completed heat dissipation is connected to the lubricating oil circuit of the retarder housing 24 through a pipeline, and then enters the positions of the friction plate 2 and the counter plate 3 through the lubricating oil circuit of the turbine shaft 1. The oil outlet hole of the lubricating oil circuit on the turbine shaft 1 is designed at a certain angle, which can reduce the blockage of the piston 14 and the output gear 15 to the lubricating oil, and improve the lubrication efficiency; the oil with completed heat dissipation has some pressure to ensure the reliability of forced lubrication. After the lubricating oil reaches the clutch, it flows out from the oil hole on the outer hub 13 of the clutch under the action of gravity and centrifugal force, and returns to the oil sump through the oil return hole on the retarder housing 24, forming a circulating oil circuit for the lubricating oil.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention according to the description in the specification and the above description; however, any slight changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and variations made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A wet clutch for a hydrodynamic mechanical transmission for a vehicle, characterized in that, Comprising a turbine shaft (1), the left end of the turbine shaft (1) can be connected to a torque converter, and the right end is provided with a transmission part which can be connected to a mechanical gearbox so as to transmit the torque of the torque converter to the mechanical gearbox; wherein: The transmission part includes a clutch outer hub (13), the clutch outer hub (13) is sleeved on the turbine shaft (1), and the clutch outer hub (13) is sequentially provided with a piston (14), friction plates (2), counter plates (3) and an output gear (15) along the transmission direction; The piston (14) can be controlled to move rightward by oil pressure to press the counter plate (3) and the friction plates (2); the piston (14) is also provided with a spring group for resetting the piston (14); The wet clutch has a lubrication system and an oil pressure system, the oil pressure system is provided with a proportional solenoid valve for controlling the on-off of the oil pressure system to adjust the movement of the piston (14); the lubrication system is used for lubricating the wet clutch.

2. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 1, characterized in that, The inner ring of the clutch outer hub (13) is provided with an internal spline in a first part along its axial direction and a smooth hole in a second part, the first part is used for engaging the counter plate (3), and the second part is used for cooperating with the seal of the piston (14).

3. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 2, characterized in that, It further includes a clutch end cover (16), the outer edge of the clutch outer hub (13) is provided as a boss, and the boss is provided with threaded holes, and the clutch end cover (16) and the clutch outer hub (13) are connected by a bolt group.

4. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 2, characterized in that, An oil hole is opened at the meshing part of the clutch outer hub (13) and the counter plate (3) to enable the lubricating oil to circulate in the lubrication system.

5. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 3, characterized in that, The left end of the output gear (15) is connected to the turbine shaft (1) through a first needle bearing (9), and the right end is connected to the clutch end cover (16) through a second needle bearing (10).

6. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 1, characterized in that, The wet clutch is provided with a lubricating oil passage (25) and a pressure oil passage (26) corresponding to the lubrication system and the oil pressure system, there is one pressure oil passage (26), and there are two lubricating oil passages (25) opened along the axial direction of the clutch outer hub (13), and the part of the lubricating oil passage (25) entering the transmission part has an inclination angle.

7. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 1, characterized in that, The spring group includes an outer ring spring group (7) and an inner ring spring group (8), the outer ring spring group (7) is assembled on the clutch outer hub (13) through a first retaining ring (11) and a baffle plate (5), and the inner ring spring group (8) is assembled on the clutch outer hub (13) through a second retaining ring (18) and a clamping plate (7).

8. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 1, characterized in that, The outer circle of the piston (14) is sealed with the clutch outer hub (13) through a first sealing ring (6), and the inner circle of the piston (14) is sealed with the turbine shaft (1) through a second sealing ring (12).

9. The wet clutch of the hydrodynamic mechanical transmission for a vehicle according to claim 1, characterized in that, Both the lubrication system and the oil pressure system are provided with plugs (4), and the plugs (4) are located at a position close to the right end of the turbine shaft (1).

10. A vehicle, characterized in that, The vehicle includes the wet clutch of the hydraulic-mechanical transmission for vehicles according to any one of claims 1-9.

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