Torque management device and vehicle

Abstract

The utility model discloses a torque management device and a vehicle, and the torque management device comprises an oil pump motor which is provided with a motor shaft; the oil pump comprises a shell and a plunger, the shell is arranged on one side of the oil pump motor, the plunger is arranged in the shell, and a motor shaft extends into the shell and is in transmission connection with the plunger; the friction plate group is communicated with the interior of the shell; and the first sealing rings are arranged on the inner wall of the shell, the multiple first sealing rings are arranged in the axial direction of the shell at intervals, and the multiple first sealing rings are located on the periphery of the motor shaft and are all in sealing fit with the motor shaft. Therefore, the plurality of first sealing rings are arranged in the shell of the oil pump and are in sealing fit with the motor shaft of the oil pump motor, so that the sealing performance of the oil pump and the oil pump motor can be improved, oil in the oil pump can be effectively prevented from entering the oil pump motor, and the problem of abnormal current caused by the fact that a powder mixture is attached to a commutator groove can be solved; therefore, the failure rate of the torque management device can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a torque management device and a vehicle. Background Technology

[0002] The torque manager is a component in a four-wheel drive system that enables switching between two-wheel drive and four-wheel drive. The electromagnetic torque manager uses an oil pump motor to drive a plunger pump within the oil pump, generating high-pressure oil that drives the friction plate assembly to press axially together, ultimately distributing torque to the axle.

[0003] In the prior art, the sealing effect of the oil pump motor and oil pump in the torque manager is limited and prone to failure. This allows oil or foreign objects in the oil pump to enter the oil pump motor, which can easily cause torque management failure. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a torque management device with a low failure rate.

[0005] This utility model further proposes a vehicle.

[0006] The torque management device according to an embodiment of the present invention includes: an oil pump motor with a motor shaft; an oil pump including a housing and a plunger, the housing being disposed on one side of the oil pump motor, the plunger being disposed inside the housing, and the motor shaft extending into the housing and being drivenly connected to the plunger; a friction plate assembly communicating with the interior of the housing; and multiple first sealing rings disposed on the inner wall of the housing, spaced apart axially along the housing, the multiple first sealing rings being located on the outer periphery of the motor shaft and all sealingly engaging with the motor shaft to prevent oil from entering the oil pump motor from the housing.

[0007] Therefore, by setting multiple first sealing rings inside the oil pump housing to seal with the motor shaft of the oil pump motor, the sealing performance of the oil pump and the oil pump motor can be improved, effectively preventing oil from entering the oil pump motor. This can solve the problem of abnormal current caused by powder mixture adhering to the commutator slot and reduce the failure rate of the torque management device.

[0008] According to some embodiments of the present invention, the housing is open at one end facing the oil pump motor, and a plurality of first sealing rings are disposed on the inner wall of the housing axially adjacent to the oil pump motor.

[0009] According to some embodiments of the present invention, there are three first sealing rings, which are spaced apart in the axial direction of the housing.

[0010] According to some embodiments of the present invention, the housing is provided with a high-pressure oil chamber and a normal-pressure oil chamber that are interconnected. The normal-pressure oil chamber is connected to the oil outlet of the friction plate assembly, and the high-pressure oil chamber is connected to the oil inlet of the friction plate assembly. The first sealing ring is disposed in the high-pressure oil chamber.

[0011] According to some embodiments of this utility model, the high-pressure oil chamber is provided with a high-pressure oil outlet, the high-pressure oil outlet is connected to the oil inlet of the friction plate assembly, and the diameter of the high-pressure oil outlet is R, which satisfies the relationship: 1mm≤R≤3mm.

[0012] According to some embodiments of the present invention, the inner wall of the housing is provided with a sealing protrusion, the sealing protrusion is located on the outer periphery of the motor shaft and abuts against the motor shaft to seal, so as to separate the interior of the housing into the high-pressure oil chamber and the normal-pressure oil chamber. A second sealing ring is provided on the inner wall of the end of the housing corresponding to the high-pressure oil chamber and adjacent to the normal-pressure oil chamber. The second sealing ring is located on the outer periphery of the motor shaft and seals against the motor shaft.

[0013] According to some embodiments of the present invention, the high-pressure oil outlet is spaced between the first sealing ring and the second sealing ring.

[0014] According to some embodiments of this utility model, a connecting pipe is also provided inside the housing. The first end of the connecting pipe is connected to the normal pressure oil chamber, and the second end of the connecting pipe is connected to the high pressure oil chamber. A filter element is provided at the first end of the connecting pipe. The connecting pipe and the motor shaft are arranged at a distance in the radial direction of the high pressure oil chamber.

[0015] According to some embodiments of the present invention, a third sealing ring is provided at the first end of the connecting pipe, and the third sealing ring is sealed between the connecting pipe and the filter element.

[0016] The vehicle according to this utility model includes the torque management device described above.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a partial schematic diagram of a torque management device according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial schematic diagram from another perspective of the torque management device according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the connecting pipe, the third sealing ring, and the filter element according to an embodiment of the present utility model;

[0022] Figure 4 This is a partial schematic diagram from another perspective of the torque management device according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of a torque management device according to an embodiment of the present invention.

[0024] Figure label:

[0025] 100. Torque management device;

[0026] 10. Oil pump motor;

[0027] 20. Oil pump; 21. Housing; 211. High-pressure oil chamber; 2111. High-pressure oil outlet; 212. Normal-pressure oil chamber; 213. Sealing protrusion;

[0028] 30. First sealing ring; 40. Second sealing ring;

[0029] 50. Connecting tube; 51. First end; 52. Second end;

[0030] 60. Filter element; 70. Third sealing ring; 80. Friction plate assembly. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0032] The following is for reference. Figures 1-5 The torque management device 100 according to an embodiment of the present invention can be applied to a vehicle.

[0033] Combination Figure 1 , Figure 2 and Figure 5As shown, the torque management device 100 according to an embodiment of the present invention mainly includes: an oil pump motor 10, an oil pump 20, a friction plate assembly 80, and a first sealing ring 30. The oil pump motor 10 is provided with a motor shaft, which can output the power generated by the oil pump motor 10 outwards. The oil pump 20 includes a housing 21 and a plunger. The housing 21 protects the internal structure and oil of the oil pump 20. The housing 21 is located on one side of the oil pump motor 10 so that the oil pump 20 is connected to the oil pump motor 10. The plunger is located inside the housing 21, allowing direct contact between the plunger and the oil in the housing 21. Rotating the plunger provides power for the flow of oil in the torque management device 100. In an embodiment of the present invention, the oil pump motor 10 and the oil pump 20 are connected as a single unit. The oil pump 20 includes, but is not limited to, a plunger pump, which contains multiple plungers. The oil pump 20 can hold a certain amount of oil, and the multiple plungers are immersed in the oil.

[0034] Furthermore, the motor shaft of the oil pump motor 10 extends into the housing 21 and is connected to the plunger drive. This allows the motor shaft to drive the plunger to rotate within the housing 21, thereby driving the oil within the housing 21 to flow in the torque management device 100 and providing a certain hydraulic pressure to the oil within the housing 21. The friction plate assembly 80 is interconnected with the interior of the housing 21, allowing oil to flow between the friction plate assembly 80 and the housing 21. When the plunger rotates to drive the oil out of the housing 21, the oil can flow towards the friction plate assembly 80, thereby pushing the friction plate assembly 80 to axially press together, transmitting power to the axle. In this way, power transmission within the vehicle can be achieved.

[0035] Furthermore, multiple first sealing rings 30 are disposed on the inner wall of the housing 21 to ensure the reliability of the multiple first sealing rings 30 on the oil pump 20. In the torque management device 100, the direction in which the oil flows from the oil pump 20 into the oil pump motor 10 is the same as the axial direction of the housing 21. The multiple first sealing rings 30 are spaced apart in the axial direction of the housing 21, which can prevent the first sealing rings 30 from flowing from the housing 21 to the oil pump motor 10, thereby enhancing the sealing performance of the oil pump 20 and the oil pump motor 10.

[0036] According to some embodiments of the present invention, the motor shaft extends into the housing 21, and the first sealing ring 30 is located on the outer periphery of the motor shaft and is sealed to the motor shaft. This not only ensures that the motor shaft rotates normally in the housing 21, but also prevents the oil in the housing 21 from flowing into the oil pump motor 10 along the motor shaft.

[0037] According to some other embodiments of the present invention, the motor shaft extends into the housing 21, and a bearing is provided on the outer periphery of the motor shaft. The first sealing ring 30 is located on the outer periphery of the motor shaft and is sealed with the housing of the bearing. This not only ensures that the motor shaft can rotate normally after extending into the housing 21, but also ensures the sealing between the bearing and the inner wall of the housing 21, which can prevent the oil in the housing 21 from flowing into the oil pump motor 10 along the motor shaft.

[0038] If oil enters the oil pump motor 10, and given the inevitable shedding of carbon and copper powder from the brushes and commutator during use, the oil will come into contact with this powder, increasing the probability of the powder mixture adhering to the commutator slots. Increased deposits in the commutator slots reduce the internal resistance, causing an abnormal increase in the current of the oil pump motor 10, ultimately leading to a logic malfunction in the four-wheel drive system. This is an inherent problem with the torque management device 100.

[0039] In this embodiment of the invention, multiple first sealing rings 30 are axially fitted with the motor shaft along the housing 21, which enhances the sealing effect between the oil pump 20 and the oil pump motor 10. The main cause of failure of the first sealing rings 30 is foreign object obstruction. In this embodiment of the invention, even if some of the multiple first sealing rings 30 fail, the others still maintain a sealing effect, thus preventing oil from entering the oil pump motor 10. This improves the sealing performance between the oil pump 20 and the oil pump motor 10, preventing the increase in current in the oil pump motor 10 caused by oil entering the oil pump motor 10, which could lead to malfunction of the torque management device 100, thereby reducing the failure rate of the torque management device 100.

[0040] According to the embodiments of this utility model, in conjunction with Figure 1 and Figure 2 As shown, the housing 21 is open at one end facing the oil pump motor 10, and a plurality of first sealing rings 30 are disposed on the inner wall of the housing 21 axially adjacent to the oil pump motor 10. Specifically, one side of the housing 21 is open to allow the motor shaft of the oil pump motor 10 to extend into the housing 21 of the oil pump 20, thereby enabling the motor shaft to be connected to the plunger in the housing 21, ensuring normal power transmission between the oil pump motor 10 and the oil pump 20.

[0041] Furthermore, multiple first sealing rings 30 are located on the inner wall of the housing 21 and positioned axially adjacent to the oil pump motor 10. This allows the multiple first sealing rings 30 to be positioned close to the motor shaft of the oil pump motor 10, facilitating a sealing fit between the multiple first sealing rings 30 and the outer circumference of the motor shaft. With a fixed circumferential length of the motor shaft, the proximity of the multiple first sealing rings 30 to the oil pump motor 10 allows for more first sealing rings 30 to be provided on the outer circumference of the motor shaft, thereby improving the sealing performance of the oil pump motor 10 and the oil pump 20.

[0042] In the embodiments of this utility model, combined with Figure 1 and Figure 2 As shown, there are three first sealing rings 30, which are spaced apart in the axial direction of the housing 21. The three first sealing rings 30 are arranged sequentially and spaced apart along the axial direction of the housing 21, and all three first sealing rings 30 are sealed and fitted with the outer circumference of the motor shaft.

[0043] This configuration serves two purposes. First, the three first sealing rings 30 effectively prevent oil from flowing into the oil pump motor 10 along the motor shaft. Second, if one or two of the three first sealing rings 30, arranged from farthest to closest to the oil pump motor 10, fail, the first sealing ring 30 closest to the oil pump motor 10 can still prevent oil from entering the oil pump motor 10. This ensures the sealing effect of the first sealing rings 30 on the oil pump motor 10 and improves the functional reliability of the torque management device 100.

[0044] In addition, one or two of the three first sealing rings 30, which are located from farthest to closest to the oil pump motor 10, can create a greater resistance force on foreign objects towards the first sealing ring 30 located near the oil pump motor 10. This makes it difficult for foreign objects to break through the resistance force and get stuck in the first sealing ring 30 located near the oil pump motor 10, thereby improving the reliability of the first sealing ring 30 located near the oil pump motor 10.

[0045] On the other hand, by setting three first sealing rings 30 between the oil pump 20 and the oil pump motor 10, the number of first sealing rings 30 can be reduced while ensuring the reliable function of the torque management device 100. This helps to reduce the difficulty of sealing and assembling the oil pump 20 and the oil pump motor 10, and helps to reduce the cost of the torque management device 100.

[0046] Combination Figure 1 and Figure 2As shown, the housing 21 is provided with a high-pressure oil chamber 211 and a normal-pressure oil chamber 212 that are interconnected. The normal-pressure oil chamber 212 is connected to the oil outlet of the friction plate assembly 80, and the high-pressure oil chamber 211 is connected to the oil inlet of the friction plate assembly 80, so that the oil in the torque management device 100 can circulate between the high-pressure oil chamber 211, the friction plate assembly 80 and the normal-pressure oil chamber 212.

[0047] Specifically, the oil flowing out of the friction plate assembly 80 enters the atmospheric pressure oil chamber 212 for storage. The oil in the atmospheric pressure oil chamber 212 can enter the high pressure oil chamber 211. Under the rotation of the plunger, the oil in the high pressure oil chamber 211 can have a certain hydraulic pressure. In this way, the oil flowing out of the high pressure oil chamber 211 can flow to the friction plate assembly 80, thereby pushing the friction plate assembly 80 to be axially pressed.

[0048] In an embodiment of this utility model, there are multiple plungers, which are disposed in the high-pressure oil chamber 211. The motor shaft extends into the high-pressure oil chamber 211 to drive the multiple plungers to rotate simultaneously in the high-pressure oil chamber 211.

[0049] Furthermore, the first sealing ring 30 is disposed in the high-pressure oil chamber 211, that is, the first sealing ring 30 is disposed close to the motor shaft. This allows multiple first sealing rings 30 to be disposed on the outer periphery of the motor shaft, so as to achieve a sealing fit between multiple first sealing rings 30 and the outer periphery of the motor shaft.

[0050] Combination Figure 1 , Figure 2 and Figure 4 As shown, the high-pressure oil chamber 211 is provided with a high-pressure oil outlet 2111, which is connected to the oil inlet of the friction plate assembly 80. With this configuration, the high-pressure oil in the high-pressure oil chamber 211 can flow out through the high-pressure oil outlet 2111, thereby allowing the high-pressure oil to flow towards the friction plate assembly 80. The high-pressure oil can enter the friction plate assembly 80 through the oil inlet, thereby enabling the high-pressure oil to push the friction plate assembly 80 axially and press it together.

[0051] According to some embodiments of this utility model, combined with Figure 4 As shown, the diameter of the high-pressure oil outlet 2111 is R, where R satisfies the relationship: 1mm ≤ R. This setting prevents the diameter of the high-pressure oil outlet 2111 from being too small. If the diameter of the high-pressure oil outlet 2111 is too small, foreign matter in the oil will block the high-pressure oil outlet 2111, preventing the high-pressure oil from pushing the friction plate assembly 80 to axially press, thus preventing power transmission in the torque management device 100. Therefore, the diameter of the high-pressure oil outlet 2111 needs to be set to be no less than the first parameter value. The first parameter value includes, but is not limited to, 0.8mm, 1.0mm, and 1.1mm.

[0052] According to some other embodiments of the present invention, in conjunction with Figure 4 As shown, the diameter of the high-pressure oil outlet 2111 is R, where R satisfies the relationship: R≤3mm. This setting prevents the diameter of the high-pressure oil outlet 2111 from being too large. If the diameter of the high-pressure oil outlet 2111 is too large, it will not pressurize the oil flowing out of the high-pressure oil chamber 211, which may result in insufficient thrust of the high-pressure oil on the friction plate assembly 80, thereby affecting the power transmission in the torque management device 100, increasing the vehicle's power loss, and causing increased fuel consumption. Therefore, the diameter of the high-pressure oil outlet 2111 needs to be set to not exceed the second parameter value. The second parameter value includes, but is not limited to, 2.9mm, 3.0mm, and 3.1mm.

[0053] According to some other embodiments of the present invention, in conjunction with Figure 4 As shown, the diameter of the high-pressure oil outlet 2111 is R, and R satisfies the relationship: 1mm≤R≤3mm. This setting can not only prevent the high-pressure oil outlet 2111 from being blocked, but also ensure the reliability of power transmission in the torque management device 100.

[0054] In the prior art, the diameter of the high-pressure oil outlet 2111 is between 5.0 mm and 8.0 mm. Compared with the prior art, the diameter of the high-pressure oil outlet 2111 in this invention is reduced, which increases the resistance of the oil flowing through the high-pressure oil outlet 2111 and increases the oil pressure after flowing out of the high-pressure oil chamber 211. This design can correspondingly reduce the speed of the oil pump motor 10, thereby reducing the impact force of the oil in the high-pressure oil chamber 211 on the inner wall of the housing 21 and the first sealing ring 30. This not only helps to increase the service life of the first sealing ring 30, but also reduces the oscillation of the oil in the high-pressure oil chamber 211, thus reducing the possibility of oil entering the oil pump motor 10.

[0055] It should be noted that a decrease in the speed of the oil pump motor 10 will reduce the oil pressure in the high-pressure oil chamber 211, and a reduction in the diameter of the high-pressure oil outlet 2111 will increase the oil pressure flowing to the friction plate assembly 80. This setting ensures that the final oil pressure flowing to the friction plate assembly 80 is not affected, ensuring the reliability of force transmission in the torque management device 100, and will not affect the overall vehicle performance.

[0056] Combination Figure 1 and Figure 2As shown, the inner wall of the housing 21 is provided with a sealing protrusion 213. The sealing protrusion 213 is located on the outer periphery of the motor shaft and abuts against the motor shaft to seal, thereby dividing the interior of the housing 21 into a high-pressure oil chamber 211 and a normal-pressure oil chamber 212. A second sealing ring 40 is provided on the inner wall of the end of the housing 21 adjacent to the normal-pressure oil chamber 212 corresponding to the high-pressure oil chamber 211. The second sealing ring 40 is located on the outer periphery of the motor shaft and seals against the motor shaft. This can ensure the sealing of the high-pressure oil chamber 211 and the normal-pressure oil chamber 212, and maintain the stability of the oil pressure in the high-pressure oil chamber 211 and the oil pressure in the normal-pressure oil chamber 212.

[0057] Combination Figure 1 and Figure 2 As shown, the high-pressure oil outlet 2111 is spaced between the first sealing ring 30 and the second sealing ring 40. This allows the high-pressure oil outlet 2111 to be positioned axially away from the oil pump motor 10 and the normal pressure oil chamber 212 in the housing 21. Within the housing 21, only the high-pressure oil in the high-pressure oil chamber 211 can flow out from the high-pressure oil outlet 2111. This ensures that the oil pressure flowing from the oil pump 20 to the friction plate assembly 80 is always high, thereby ensuring the reliability of the high-pressure oil driving the friction plate assembly 80 and the operational reliability of the torque management device 100.

[0058] Combination Figures 1-3 As shown, a connecting pipe 50 is also provided inside the housing 21. The first end 51 of the connecting pipe 50 is connected to the atmospheric pressure oil chamber 212, and the second end 52 of the connecting pipe 50 is connected to the high pressure oil chamber 211. A filter element 60 is provided at the first end 51 of the connecting pipe 50. Specifically, the connecting pipe 50 is located between the atmospheric pressure oil chamber 212 and the high pressure oil chamber 211, and both ends of the connecting pipe 50 are connected to the atmospheric pressure oil chamber 212 and the high pressure oil chamber 211, respectively. This arrangement allows the oil to flow between the atmospheric pressure oil chamber 212 and the high pressure oil chamber 211. In this embodiment of the present invention, the oil in the atmospheric pressure oil chamber 212 flows to the high pressure oil chamber 211 through the connecting pipe 50.

[0059] Furthermore, the connecting pipe 50 and the motor shaft are radially spaced apart in the high-pressure oil chamber 211, thus ensuring that the connecting pipe 50 and the motor shaft are spaced apart within the high-pressure oil chamber 211. In this embodiment of the invention, the second end 52 of the connecting pipe 50 is spaced apart from one end of the motor shaft in the high-pressure oil chamber 211. This arrangement ensures, on the one hand, that the motor shaft can rotate normally within the high-pressure oil chamber 211, and on the other hand, that the second end 52 of the connecting pipe 50 remains unobstructed, ensuring that oil flows smoothly from the atmospheric pressure oil chamber 212 into the high-pressure oil chamber 211.

[0060] When the oil circulates in the torque management device 100, it passes through a large number of oil passages, friction plate assembly 80, bearings and pistons, etc. During the oil flow, metal parts will shed a small amount of metal fragments, which will reduce the cleanliness of the oil and easily cause oil circuit blockage. In addition, more foreign objects will impact the first sealing ring 30 in the high-pressure oil chamber 211.

[0061] Furthermore, the second end 52 of the connecting pipe 50 extends into the atmospheric pressure oil chamber 212, and a filter element 60 is installed at the second end 52 of the connecting pipe 50. In this way, when the oil in the atmospheric pressure oil chamber 212 enters the connecting pipe 50, it must first pass through the filter element 60. This can prevent foreign objects in the atmospheric pressure oil from entering the high pressure oil chamber 211 through the connecting pipe 50. This can further reduce the amount of foreign objects in the high pressure oil chamber 211, thereby preventing the first sealing ring 30 from failing under the impact of foreign objects, and thus improving the sealing reliability of the oil pump 20 and the oil pump motor 10.

[0062] Combination Figure 1 and Figure 3 As shown, a third sealing ring 70 is fitted onto the first end 51 of the connecting pipe 50, and the third sealing ring 70 is sealed between the connecting pipe 50 and the filter element 60. In the embodiment of this utility model, the structure of the filter element 60 includes, but is not limited to, a filter screen, which is wrapped around the second end 52 of the connecting pipe 50. The filter screen has a hollow structure, and the third sealing ring 70 includes, but is not limited to, an "O" ring. The "O" ring can fit tightly with the connecting pipe 50 to ensure the reliability of the filter screen at the second end 52 of the connecting pipe 50, thereby ensuring the reliability of the filtration of oil flowing from the atmospheric pressure oil chamber 212 to the high pressure oil chamber 211 by the filter element 60.

[0063] According to an embodiment of the present invention, the oil pump motor 10 includes the torque management device 100 described in this embodiment. The torque management device 100 of the present invention improves the sealing performance of the oil pump 20 and the oil pump motor 10 by providing multiple first sealing rings 30 within the housing 21 of the oil pump 20 to seal against the motor shaft of the oil pump motor 10. This effectively prevents oil from the oil pump 20 from entering the oil pump motor 10, solves the problem of abnormal current caused by powder mixtures adhering to the commutator slot, and thus reduces the failure rate of the torque management device 100.

[0064] This embodiment of the utility model does not increase the arrangement space of the torque management device 100, but only optimizes the internal structure of the torque management device 100. It has no impact on the overall vehicle size and weight. At the same time, this embodiment of the utility model has no impact on the safety of the vehicle and can be directly applied to the after-sales maintenance of the vehicle. It also has a positive effect on improving the performance of the after-sales vehicle and reducing maintenance costs.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0066] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A torque management device, characterized in that, include: An oil pump motor, wherein the oil pump motor is provided with a motor shaft; An oil pump, comprising a housing and a plunger, wherein the housing is disposed on one side of the oil pump motor, the plunger is disposed inside the housing, and the motor shaft extends into the housing and is drivenly connected to the plunger; A friction plate assembly, wherein the friction plate assembly is in communication with the interior of the housing; The first sealing ring is disposed on the inner wall of the housing and there are multiple first sealing rings. The multiple first sealing rings are spaced apart in the axial direction of the housing and are located on the outer periphery of the motor shaft and are all in sealing cooperation with the motor shaft.

2. The torque management device according to claim 1, characterized in that, The housing is open at one end facing the oil pump motor, and a plurality of first sealing rings are disposed on the inner wall of the housing axially adjacent to the oil pump motor.

3. The torque management device according to claim 2, characterized in that, There are three first sealing rings, which are spaced apart in the axial direction of the housing.

4. The torque management device according to claim 3, characterized in that, The housing is provided with a high-pressure oil chamber and a normal-pressure oil chamber that are interconnected. The normal-pressure oil chamber is connected to the oil outlet of the friction plate assembly, and the high-pressure oil chamber is connected to the oil inlet of the friction plate assembly. The first sealing ring is disposed in the high-pressure oil chamber.

5. The torque management device according to claim 4, characterized in that, The high-pressure oil chamber is provided with a high-pressure oil outlet, which is connected to the oil inlet of the friction plate assembly. The diameter of the high-pressure oil outlet is R, and R satisfies the relationship: 1mm≤R≤3mm.

6. The torque management device according to claim 5, characterized in that, The inner wall of the housing is provided with a sealing protrusion, which is located on the outer periphery of the motor shaft and abuts against the motor shaft to seal, thereby separating the interior of the housing into the high-pressure oil chamber and the normal-pressure oil chamber. A second sealing ring is provided on the inner wall of the end of the housing corresponding to the high-pressure oil chamber and adjacent to the normal-pressure oil chamber. The second sealing ring is located on the outer periphery of the motor shaft and seals against the motor shaft.

7. The torque management device according to claim 6, characterized in that, The high-pressure oil outlet is spaced between the first sealing ring and the second sealing ring.

8. The torque management device according to claim 4, characterized in that, The housing is also provided with a connecting pipe. The first end of the connecting pipe is connected to the normal pressure oil chamber, and the second end of the connecting pipe is connected to the high pressure oil chamber. A filter element is provided at the first end of the connecting pipe. The connecting pipe and the motor shaft are arranged at a distance in the radial direction of the high pressure oil chamber.

9. The torque management device according to claim 8, characterized in that, A third sealing ring is fitted at the first end of the connecting pipe, and the third sealing ring is sealed between the connecting pipe and the filter element.

10. A vehicle, characterized in that, Includes the torque management device according to any one of claims 1-9.

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