CN114483831A

CN114483831A - Clutch of electric vehicle

Info

Publication number: CN114483831A
Application number: CN202210230731.XA
Authority: CN
Inventors: 杜磊
Original assignee: Dachuan Electric Machinery Technology Jiangsu Co ltd
Current assignee: Dachuan Electric Machinery Technology Jiangsu Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-05-13

Abstract

The invention discloses a clutch of an electric vehicle, and belongs to the technical field of clutches. The utility model provides an electric motor car clutch, includes the fixing base through screw fixed connection on motor housing, its characterized in that still includes: the planetary gear braking assembly is arranged on the fixed seat and is connected with the output shaft of the motor; the brake worm wheel is arranged on the outer side of the fixed seat, and the brake worm wheel and the fixed seat are coaxially arranged; the braking jack is arranged on the fixed seat through the steel wire retainer ring; the invention controls the brake jack to brake the gearbox through the worm gear and the worm, has the advantages of small impact of speed change on the gear, less oil stain and simple structure, can be applied to other speed change mechanisms and other industries, simultaneously drives the worm to move through buffering the brake jack, and further adjusts the clearance when the worm rotates in the positive and negative directions, basically realizes zero-clearance transmission of the worm and the worm gear, and has high transmission precision and strong practicability.

Description

Clutch of electric vehicle

Technical Field

The invention relates to the technical field of clutches, in particular to a clutch of an electric vehicle.

Background

In the market of electric power-assisted bicycles, the market is growing rapidly, and due to the increasing demand for environmental protection, many cities in europe are beginning to encourage the exchange of fuel-powered vehicles for electric power-assisted bicycles, which are of the kind including common-form two-wheeled bicycles and cargo-carrying bicycles available for carrying cargo.

The clutch is mounted between the engine and the transmission and is an assembly in the vehicle driveline that is directly associated with the engine. The clutch is usually mounted with the flywheel set of the engine crankshaft and is the part that cuts off and transmits power between the engine and the vehicle drive train. The function of the device is to ensure that the engine and the transmission can be gradually jointed, thereby ensuring the stable starting of the automobile; temporarily disconnecting the engine from the transmission to facilitate shifting and reduce shock during shifting; when the automobile is braked emergently, the brake can play a role in separation, and the transmission systems such as a speed changer and the like are prevented from being overloaded, so that a certain protection effect is achieved.

The existing speed change system on the market is not suitable for a cargo-carrying bicycle, a chain is easy to damage by using a conventional derailleur due to the large load of the cargo-carrying bicycle, an inner speed change hub is used for replacing the derailleur on the market, but the whole bicycle is easy to lose efficacy due to the fact that the inner speed change hub is easy to damage due to the high output torque of an electric power-assisted bicycle, and the cost is high. The prior speed change mechanism controller controls the work of the speed changer through a dry friction plate and a wet friction plate, has high price and complex structure, and is not beneficial to being used for small vehicles.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a clutch of an electric vehicle.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an electric motor car clutch, includes the fixing base through screw fixed connection on motor housing, still includes:

the planetary gear brake assembly is arranged on the fixed seat and is connected with the output shaft of the motor;

the brake worm wheel is fixedly arranged on the outer side of the fixed seat, and the brake worm wheel and the fixed seat are coaxially arranged;

the brake jack is arranged on the fixed seat through a steel wire clamping ring, the steel wire clamping ring is used for torsional reset of the brake jack, and two sides of the brake jack are respectively movably abutted against the brake worm gear and the planetary gear brake assembly;

the brake worm is fixedly arranged on the fixed seat through a support and is in meshed connection with the brake worm wheel; and

a buffer gap reducing mechanism; the buffer gap reducing mechanism is arranged on the brake jack and used for driving the brake worm to axially displace.

Preferably, one end of the braking jack is rotatably connected with the steel wire clamping ring through a rotating shaft, and the other end of the braking jack rotates by taking the rotating shaft as a circle center.

Preferably, the braking worm wheel is provided with a limiting frame, the limiting frame is provided with a limiting groove, the planetary gear braking assembly is provided with a clamping groove, and one side, away from the rotating shaft, of the braking jack is movably connected in the limiting groove and the clamping groove respectively.

Preferably, the buffering and gap reducing mechanism comprises a buffering mechanism and a gap reducing mechanism, the buffering mechanism comprises a first cavity and a second cavity which are arranged on two sides of the braking jack, inner walls of the first cavity and the second cavity are connected with a first elastic element, the other end of the first elastic element is connected with a first plug plate, and one end, far away from the first elastic element, of the first plug plate is connected with a buffering plate through a connecting rod.

Preferably, the gap reducing mechanism comprises a sleeve rod arranged on the support, a moving rod is connected to the sleeve rod in a sliding mode, the moving rod is fixedly connected with the brake worm, a third cavity is formed in the sleeve rod, a second plug plate is connected to the inner wall of the third cavity in a sliding mode, a push rod is connected to the second plug plate, one end, far away from the second plug plate, of the push rod penetrates through the third cavity and is abutted to the moving rod in a movable mode, a second elastic element is sleeved on the outer wall of the push rod, two ends of the second elastic element are connected with the second plug plate and the inner wall of the third cavity respectively, the gap mechanism further comprises a first pipeline and a second pipeline, the first pipeline is connected with the first cavity and the third cavity, and the second pipeline is connected with the second cavity and the third cavity.

Preferably, a moving groove is formed in the loop bar, a guide strip is arranged in the moving groove, a guide groove matched with the guide strip is formed in the moving bar, and a third elastic element is arranged between the moving bar and the moving groove.

Preferably, an oil inlet used for being connected with a first pipeline is formed in the third cavity, two guide rods are arranged on the inner wall of the third cavity and symmetrically arranged on two sides of the oil inlet, a partition plate used for plugging the oil inlet is connected to the guide rods in a sliding mode, and a fourth elastic element is further sleeved on the guide rods in a sleeved mode.

Preferably, a rubber sealing ring is bonded on the partition plate, and the rubber sealing ring is movably abutted against the inner wall of the third cavity.

Preferably, a fourth cavity is formed in the partition plate, one end, far away from the second cavity, of the second pipeline penetrates through the third cavity and is communicated with the fourth cavity, a third plug plate is connected to the inner wall of the fourth cavity in a sliding mode, a fifth elastic element is arranged between the third plug plate and the inner wall of the fourth cavity, one end, far away from the fifth elastic element, of the third plug plate is connected with a movable plate, and a through hole matched with the oil inlet is formed in the movable plate.

Preferably, hydraulic oil is filled between the first plug plate and the second plug plate in the first cavity and between the first plug plate and the third plug plate in the second cavity.

Compared with the prior art, the invention provides an electric vehicle clutch, which has the following beneficial effects:

1. this electric motor car clutch through using the very heavy braking scheme of worm gear control braking, and whole control process only needs to be accomplished through the mode of rotatory worm, can reach the lock as required and loosen two purposes to rotate according to the needs of planet wheel, compare with traditional gearbox braking scheme, it is little to have the impact of variable speed to the gear, and the greasy dirt is few, advantages such as simple structure.

2. This electric motor car clutch sets up buffer gear through the both sides at the very heavy braking, makes the very heavy in-process that offsets with chucking groove and spacing groove of braking, weakens the impact force that receives, and then improves the very heavy and planetary gear braking component's of braking life.

3. This electric motor car clutch because when worm and worm wheel meshing, there is reverse return difference when positive reverse transmission, through buffer gear's work, makes buffer gear move through subtracting clearance mechanism drive worm at the during operation, and then transfers the clearance when the worm is positive reverse rotation, realizes the zero clearance transmission of worm and worm wheel basically, and the transmission precision is high, and the practicality is strong.

4. The clutch of the electric vehicle can be applied to a controllable gearbox of a two-wheel vehicle and can also be applied to other speed change mechanisms and other industries.

Drawings

FIG. 1 is a schematic diagram of a theoretical locking structure of a planetary gear brake assembly of the present invention;

FIG. 2 is a schematic illustration of the theoretical release of the planetary brake assembly of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic view of the overall structure of the present invention;

FIG. 5 is a schematic cross-sectional view of the brake jack of the present invention;

FIG. 6 is a schematic cross-sectional view of a loop bar of the present invention;

FIG. 7 is an enlarged view of a portion of portion A of FIG. 6 according to the present invention;

fig. 8 is a schematic structural diagram of a servo steering engine arranged outside the fixed seat.

In the figure: 10. a fixed seat; 11. a limiting groove; 20. a planetary gear brake assembly; 21. a clamping groove; 30. braking the jack; 31. a first cavity; 32. a second cavity; 33. a first elastic element; 34. a first plug plate; 35. a buffer plate; 40. a steel wire retainer ring; 50. a brake worm gear; 60. braking the worm; 70. a support; 71. a loop bar; 711. a third cavity; 712. a second plug plate; 713. a top rod; 714. a second elastic element; 715. a moving groove; 716. a guide strip; 717. a third elastic element; 72. a travel bar; 721. a guide groove; 73. a first conduit; 74. a second conduit; 80. an oil inlet; 81. a guide bar; 82. a partition plate; 83. a fourth elastic element; 821. a rubber seal ring; 83. a fourth elastic element; 84. a fourth cavity; 841. a third plug plate; 842. a fifth elastic element; 843. a movable plate; 8431. and a through hole.

Detailed Description

The technical solution 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; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1, 2, 3, 4, 5 and 6, an electric vehicle clutch includes a fixing base 10 fixedly connected to a motor housing by screws, and further includes:

the planetary gear brake assembly 20 is arranged on the fixed seat 10, and the planetary gear brake assembly 20 is connected with the output shaft of the motor;

the brake worm wheel 50 is fixedly arranged on the outer side of the fixed seat 10, and the brake worm wheel 50 is coaxially arranged with the fixed seat 10;

the brake jack 30 is arranged on the fixed seat 10 through a steel wire clamping ring 40, the steel wire clamping ring 40 is used for torsional reset of the brake jack 30, and two sides of the brake jack 30 are respectively movably abutted against the brake worm gear 50 and the planetary gear brake assembly 20;

the brake worm 60 is fixedly arranged on the fixed seat 10 through a support 70, and the brake worm 60 is meshed with the brake worm wheel 50; and

a buffer gap reducing mechanism; the buffer backlash reducing mechanism is provided on the brake jack 30 for driving the brake worm 60 to displace in the axial direction.

Furthermore, one end of the brake jack 30 is rotatably connected with the steel wire collar 40 through a rotating shaft, and the other end of the brake jack 30 rotates around the rotating shaft as a circle center.

Furthermore, a limiting frame is arranged on the brake worm wheel 50, a limiting groove 11 is formed in the limiting frame, a clamping groove 21 is formed in the planetary gear brake assembly 20, and one side, far away from the rotating shaft, of the brake jack 30 is movably connected into the limiting groove 11 and the clamping groove 21 respectively.

Concretely, through the braking scheme that uses worm gear control brake jack 30, whole control process only needs to be accomplished through the mode of rotatory worm, when brake jack 30 was in the spacing groove 11 of spacing, the elasticity of steel wire rand 40 can be with braking jack 30 jack to the spacing groove 11 in, planetary gear braking component 20 can rotate this moment, through the reversal worm, make the worm wheel operation, at this in-process, the worm wheel drives spacing inside wall extrusion brake jack 30, make brake jack 30 use the pivot to deflect as the centre of a circle, make brake jack 30 arrange in chucking groove 21, planetary gear braking component 20 blocks completely, can reach lock and loosen two purposes as required, thereby make the rotation as required of planet wheel, compare with traditional gearbox braking scheme, it is little to have the impact of variable speed to the gear, the greasy dirt is few, advantages such as simple structure.

Referring to fig. 4 and 5, as a preferred technical solution of the present invention, the damping and gap-reducing mechanism includes a damping mechanism and a gap-reducing mechanism, the damping mechanism includes a first cavity 31 and a second cavity 32 which are opened at both sides of the brake jack 30, inner walls of the first cavity 31 and the second cavity 32 are both connected with a first elastic element 33, the other end of the first elastic element 33 is connected with a first plug plate 34, and one end of the first plug plate 34 far away from the first elastic element 33 is connected with a damping plate 35 through a connecting rod.

Specifically, when the braking jack 30 is respectively located in the limiting groove 11 or the clamping groove 21, the convex block in the limiting groove 11 or the clamping groove 21 pushes against the buffer plate 35, so that the buffer plate 35 pushes against the first plug plate 34 through the connecting rod, and the first elastic element 33 is compressed, so that the braking jack 30 is pushed against the clamping groove 21 and the limiting groove 11, the received impact force is weakened, and the service life of the braking jack 30, the worm wheel and the planetary gear braking assembly 20 is prolonged.

Referring to fig. 4, 5, 6 and 7, as a preferred technical solution of the present invention, the backlash reducing mechanism includes a sleeve rod 71 disposed on the support 70, a moving rod 72 is slidably connected in the sleeve rod 71, the moving rod 72 is fixedly connected with the brake worm 60, a third cavity 711 is formed in the sleeve rod 71, a second plug plate 712 is slidably connected to an inner wall of the third cavity 711, a push rod 713 is connected to the second plug plate 712, one end of the push rod 713, which is far away from the second plug plate 712, passes through the third cavity 711 and movably abuts against the moving rod 72, a second elastic element 714 is sleeved on an outer wall of the push rod 713, two ends of the second elastic element 714 are respectively connected to inner walls of the second plug plate 712 and the third cavity 711, the backlash reducing mechanism further includes a first pipeline 73 and a second pipeline 74, the first pipeline 73 connects the first cavity 31 and the third cavity 711, and the second pipeline 74 connects the second cavity 32 and the third cavity 711.

Further, a moving groove 715 is formed in the loop bar 71, a guide bar 716 is arranged in the moving groove 715, a guide groove 721 matched with the guide bar 716 is formed in the moving bar 72, and a third elastic element 717 is arranged between the moving bar 72 and the moving groove 715.

Furthermore, an oil inlet 80 for connecting the first pipeline 73 is formed in the third cavity 711, two guide rods 81 are arranged on the inner wall of the third cavity 711, the two guide rods 81 are symmetrically arranged on two sides of the oil inlet 80, a partition plate 82 for blocking the oil inlet 80 is slidably connected to the guide rods 81, and a fourth elastic element 83 is further sleeved on the guide rods 81.

Furthermore, a fourth cavity 84 is formed in the partition plate 82, one end of the second pipeline 74, which is far away from the second cavity 32, penetrates through the third cavity 711 and is communicated with the fourth cavity 84, a third plug plate 841 is slidably connected to the inner wall of the fourth cavity 84, a fifth elastic element 842 is arranged between the third plug plate 841 and the inner wall of the fourth cavity 84, a movable plate 843 is connected to one end of the third plug plate 841, which is far away from the fifth elastic element 842, and a through hole 8431 matched with the oil inlet 80 is formed in the movable plate 843.

Further, hydraulic oil is filled between the first plug plate 34 and the second plug plate 712 in the first cavity 31 and between the first plug plate 34 and the third plug plate 841 in the second cavity 32.

Specifically, when the brake jack 30 is located in the clamping groove 21, the planetary gear brake assembly 20 is in a clamping state, the bump in the clamping groove 21 applies force to the buffer plate 35 in the first cavity 31, the first plug plate 34 is stressed and presses the first elastic element 33, the first elastic element 33 is compressed, the first plug plate 34 presses the hydraulic oil in the first cavity 31 to the third cavity 711 through the first pipeline 73, the pressed hydraulic oil applies force to the partition plate 82, the partition plate 82 moves on the guide rod 81, the fourth elastic element 83 is compressed, so that the hydraulic oil can enter the third cavity 711 and apply force to the second plug plate 712, the second plug plate 712 presses the second elastic element 714 and applies force to the moving rod 72 in the moving groove 715 through the ejector 713, so that the third elastic element 717 is stretched, the moving rod 72 pushes the worm to move, and preparation is made for reverse rotation after the worm to release the clamping state of the planetary gear brake assembly 20, the problem that when the worm is meshed with the worm wheel, reverse return difference exists during forward and reverse transmission to influence the transmission precision of the worm wheel and the worm is avoided; when the locking state of the planetary gear brake assembly 20 needs to be released, the sleeve rod 71 is rotated reversely, so that the sleeve rod 71 drives the movable rod 72 to rotate through the guide strip 716, and further drives the worm to be engaged with the worm wheel, zero-gap transmission of the worm and the worm wheel is basically realized, the transmission precision is high, the limit frame is driven to rotate when the worm wheel rotates, in the process, the inner wall of the limit frame abuts against the brake jack 30, the brake jack 30 moves out of the locking groove 21, the first elastic element 33 in the first cavity 31 recovers and drives the first plug plate 34 to reset, the hydraulic oil in the first cavity 31 does not act on the partition plate 82 any more, the partition plate 82 blocks the oil inlet 80 again, the hydraulic oil which enters the third cavity 711 is prevented from flowing outwards, the hydraulic oil which enters the third cavity 711 continues to act on the second plug plate 712, so that the ejector rod 713 acts on the movable rod 72, and the worm wheel are kept in a tight engagement state, when the limiting frame rotates with the worm wheel for a certain angle, the steel wire collar 40 elastically pushes the brake jack 30 to be placed in the limiting groove 11 from the clamping groove 21, the bump in the limiting groove 11 acts on the buffer plate 35 in the second cavity 32 to move the first plug plate 34 in the second cavity 32, further the hydraulic oil in the second cavity 32 is extruded into the fourth cavity 84 through the second pipeline 74, and acts on the third plug plate 841 to push the third plug plate 841 to move the movable plate 843, the movable plate 843 moves outwards and make the through hole 8431 match with the oil inlet 80, at this time, the second elastic element 714 in the third cavity 711 recovers and pushes the second plug plate 712 to move, so that the hydraulic oil in the third cavity is discharged into the first cavity 31 from the through hole 8431 and the oil inlet 80, at this time, the mandril 713 no longer acts on the moving rod 72, the moving rod 72 moves and resets under the action of the third elastic element 717, further the worm moves back, under the pulling force of the third elastic element 717, the worm wheel is tightly abutted, and the planet gear brake assembly 20 is ready to be clamped again next time.

Referring to fig. 6 and 7, as a preferred embodiment of the present invention, a rubber sealing ring 821 is bonded to the partition 82, and the rubber sealing ring 821 is movably abutted against the inner wall of the third cavity 711; the sealing effect of the partition plate 82 on the oil inlet 80 is improved.

Referring to fig. 8, as a preferred technical scheme of the present invention, a servo steering engine may be disposed on the fixed base 10, and the output end of the servo steering engine limits and clamps the planetary gear brake assembly 20 by using the servo steering engine to replace a structure of a motor, a worm wheel and a worm.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an electric motor car clutch, includes fixing base (10) through screw fixed connection on motor housing, its characterized in that still includes:

the planetary gear brake assembly (20) is arranged on the fixed seat (10), and the planetary gear brake assembly (20) is connected with an output shaft of the motor;

the brake worm wheel (50), the brake worm wheel (50) is arranged on the outer side of the fixed seat (10), and the brake worm wheel (50) and the fixed seat (10) are coaxially arranged;

the brake device comprises a brake jack (30), wherein the brake jack (30) is arranged on a fixed seat (10) through a steel wire clamping ring (40), the steel wire clamping ring (40) is used for torsion reset of the brake jack (30), and two sides of the brake jack (30) are respectively movably abutted against a brake worm wheel (50) and a planetary gear brake assembly (20);

the brake worm (60) is fixedly arranged on the fixed seat (10) through a support (70), and the brake worm (60) is meshed and connected with the brake worm wheel (50); and

a buffer gap reducing mechanism; the buffer gap reducing mechanism is arranged on the brake jack (30) and used for driving the brake worm (60) to axially displace.

2. The clutch for the electric vehicle as claimed in claim 1, wherein one end of the brake jack (30) is rotatably connected with the steel wire collar (40) through a rotating shaft, and the other end of the brake jack (30) rotates around the rotating shaft.

3. The clutch for the electric vehicle as claimed in claim 2, wherein a limiting frame is arranged on the braking worm wheel (50), a limiting groove (11) is formed in the limiting frame, a clamping groove (21) is formed in the planetary gear braking assembly (20), and one side, far away from the rotating shaft, of the braking jack (30) is movably connected into the limiting groove (11) and the clamping groove (21) respectively.

4. The electric vehicle clutch according to claim 1, characterized in that the buffer gap-reducing mechanism comprises a buffer mechanism and a gap-reducing mechanism, the buffer mechanism comprises a first cavity (31) and a second cavity (32) which are arranged on two sides of the brake jack (30), the inner walls of the first cavity (31) and the second cavity (32) are connected with a first elastic element (33), the other end of the first elastic element (33) is connected with a first plug plate (34), and one end of the first plug plate (34) far away from the first elastic element (33) is connected with a buffer plate (35) through a connecting rod.

5. The electric vehicle clutch according to claim 4, wherein the gap reducing mechanism comprises a sleeve rod (71) arranged on a support (70), a moving rod (72) is slidably connected in the sleeve rod (71), the moving rod (72) is fixedly connected with the brake worm (60), a third cavity (711) is formed in the sleeve rod (71), a second plug plate (712) is slidably connected to the inner wall of the third cavity (711), a push rod (713) is connected to the second plug plate (712), one end of the push rod (713) far away from the second plug plate (712) penetrates through the third cavity (711) and movably abuts against the moving rod (72), a second elastic element (714) is sleeved on the outer wall of the push rod (713), two ends of the second elastic element (714) are respectively connected with the second plug plate (712) and the inner wall of the third cavity (711), and the gap reducing mechanism further comprises a first pipeline (73) and a second pipeline (74), the first duct (73) connects the first cavity (31) and the third cavity (711), and the second duct (74) connects the second cavity (32) and the third cavity (711).

6. The clutch for the electric vehicle as claimed in claim 5, wherein a moving groove (715) is formed in the sleeve rod (71), a guide bar (716) is formed in the moving groove (715), a guide groove (721) matched with the guide bar (716) is formed in the moving rod (72), and a third elastic element (717) is arranged between the moving rod (72) and the moving groove (715).

7. The electric vehicle clutch according to claim 5, characterized in that an oil inlet (80) for connecting the first pipeline (73) is formed in the third cavity (711), two guide rods (81) are arranged on the inner wall of the third cavity (711), the two guide rods (81) are symmetrically arranged on two sides of the oil inlet (80), a partition plate (82) for blocking the oil inlet (80) is connected to the guide rods (81) in a sliding manner, and a fourth elastic element (83) is further sleeved on the guide rods (81).

8. The clutch for the electric vehicle as claimed in claim 7, wherein a rubber sealing ring (821) is bonded to the partition plate (82), and the rubber sealing ring (821) is movably abutted against the inner wall of the third cavity (711).

9. The clutch for the electric vehicle as claimed in claim 1, wherein a fourth cavity (84) is formed in the partition plate (82), one end of the second pipeline (74) far away from the second cavity (32) penetrates through the third cavity (711) and is communicated with the fourth cavity (84), a third plug plate (841) is slidably connected to the inner wall of the fourth cavity (84), a fifth elastic element (842) is arranged between the third plug plate (841) and the inner wall of the fourth cavity (84), one end of the third plug plate (841) far away from the fifth elastic element (842) is connected with a movable plate (843), and a through hole (8431) matched with the oil inlet (80) is formed in the movable plate (843).

10. An electric vehicle clutch according to claim 9, characterized in that the first cavity (31) is filled with hydraulic oil between the first plug plate (34) and the second plug plate (712) and the second cavity (32) is filled with hydraulic oil between the first plug plate (34) and the third plug plate (841).