A wet clutch for a purely electric multi-gear transmission

Abstract

The present application relates to the technical field of clutches, and discloses a wet clutch for a pure electric multi-gear transmission, which comprises an outer shell, the inner side of the outer shell is movably connected with an input gear for transmitting motor torque, the outer part of the input gear is fixedly connected with an inner shell for connecting and matching the input gear, and the inner part of the outer shell is movably connected with a partition plate. The input gear and the inner shell transmit torque, and multiple partition plates, friction plates and back plates cooperate to realize the transmission of different torques, thereby improving the transmission of different gears, large torque and high speed of the electric drive clutch. The electric drive clutch internally adopts simple mechanical components such as input gears, partition plates, friction plates, back plates, acting pressure plates, piston shells, balance pistons and cooperating pistons, which not only reduces the structural space of the electric drive clutch, but also reduces the complexity of the electric drive clutch, and improves the practicability and stability of the electric drive clutch.

Description

Technical Field

[0001] The present invention relates to the technical field of clutches, and in particular to a wet clutch for a pure electric multi-speed transmission. Background Art

[0002] Traditional electric drive systems are all single-speed reduction gearboxes, which place high demands on motor performance, such as speed and torque. To achieve extended driving range, larger batteries are often required. Furthermore, excessively high system speeds can affect the vehicle's NVH performance. Therefore, the development of two- or multi-speed electric drive transmissions is urgent. The core component of such transmissions is the clutch, which places extremely high demands on clutch design. It must transmit extremely high torque and speed while also being compact. Electric clutches transmit high speeds, exceeding 10,000 rpm, confining both axial and radial dimensions to a very small space. Furthermore, the clutch must respond quickly, enabling torque interruption and engagement in milliseconds. Currently, there are no mass-produced clutches in the electric drive multi-speed transmission market that meet these stringent requirements. Summary of the Invention

[0003] To address the lack of reliable clutch products in the aforementioned electric drive transmission field, there is an urgent need to develop a corresponding clutch product that can transmit extremely high torque and meet extremely high speeds, while also being compact and responsive, and able to quickly interrupt and engage torque in milliseconds, thereby improving vehicle efficiency and battery life.

[0004] The present invention is achieved through the following technical solutions: A wet clutch for a pure electric multi-speed transmission, comprising an outer shell, the inner side of the outer shell being movably connected to an input gear for transmitting motor torque, the outside of the input gear being fixedly connected to an inner shell for connecting to a mating input gear, the interior of the outer shell being movably connected to a partition plate, the interior of the outer shell being movably connected to a friction plate, the interior of the outer shell being movably connected to a back plate, and the outside of the back plate being fixedly connected to a hole retaining spring for axially fixing the partition plate, friction plate and back plate. The outer shell is internally movably connected to an acting pressure plate for controlling the movement of the partition plate, the outer shell is internally movably connected to a piston housing for generating a balancing chamber inside the outer shell, the piston housing is internally movably connected to a balancing piston for matching the piston housing to form a balancing chamber, the fixed inner part of the outer shell is connected to an output hub, the inner part of the output hub is internally movably connected to a gearbox shaft, the outer part of the acting pressure plate is externally movably connected to a spring disk, the inner part of the acting pressure plate is internally movably connected to a matching piston, the outer part of the output hub is externally movably connected to an acting piston for cooperating with the matching piston to form a pressure chamber inside the outer shell, the outer part of the piston housing is externally movably connected to a shaft retaining spring, and the inner side of the output hub is movably connected to a sealing ring.

[0005] Furthermore, the inner housing and the friction plate are movably connected via a spline, the friction plate and the partition plate are coaxial, the friction plate and the back plate are coaxial, and the partition plate, the back plate and the friction plate are arranged alternately.

[0006] Furthermore, a pressure chamber is formed between the acting pressure plate, the matching piston, and the acting piston, and the piston housing is movably connected to the output hub via a shaft retaining spring.

[0007] Furthermore, the spring disk is movably connected to the action piston, and the spring disk is movably connected to the inner wall of the piston housing.

[0008] Furthermore, a balancing chamber is formed among the action pressure plate, the piston housing, the balancing piston, and the matching piston.

[0009] Furthermore, the output hub is movably connected to the gearbox shaft via a spline, and the working piston is fixedly connected to the output hub.

[0010] Furthermore, the contact portion between the output hub and the gearbox shaft is sealed with a sealing ring, there are two sealing rings, and the sealing rings are O-ring type.

[0011] The present invention provides a wet clutch for a pure electric multi-speed transmission. It has the following beneficial effects:

[0012] The torque is transmitted through the input gear and the inner housing, and multiple partition plates, friction plates and back plates cooperate to realize the transmission of different torques, thereby improving the transmission of high torque and high speed in different gears of the electric drive clutch. The partition plates and friction plates are normally open, which increases the operating efficiency of the gearbox. At the same time, the cross-sectional area of ​​the balance chamber formed between the action pressure plate, piston housing, balance piston and matching piston is approximately equal to the cross-sectional area of ​​the pressure chamber formed between the action pressure plate, balance piston, matching piston and action piston, thereby making the clutch more stable at different speeds and saving hydraulic transmission kinetic energy. At the same time, oil heat dissipation is used inside the clutch to improve the reliability and stability of the electric drive clutch. The electric drive clutch uses simple mechanical components such as input gear, partition plate, friction plate, back plate, action pressure plate, piston housing, balance piston and matching piston, which not only reduces the structural space of the electric drive clutch, but also reduces the complexity of the electric drive clutch and improves the practicality and stability of the electric drive clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the internal side structure of the present invention;

[0014] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at center A;

[0015] Figure 3 For the present invention Figure 1A magnified schematic diagram of the structure at point B in the middle;

[0016] Figure 4 For the present invention Figure 1 Enlarged schematic diagram of the structure at point C in the middle.

[0017] In the figure: 1. Outer shell; 11. Input gear; 12. Inner shell; 13. Partition plate; 14. Friction plate; 15. Back plate; 16. Hole retaining spring; 2. Action pressure plate; 21. Piston shell; 22. Balance piston; 23. Output hub; 24. Gearbox shaft; 25. Spring plate; 26. Mating piston; 27. Action piston; 28. Shaft retaining spring; 29. ​​Sealing ring. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The embodiment of the wet clutch for the pure electric multi-speed transmission is as follows:

[0020] Example 1

[0021] See also Figure 1 - Figure 2 A wet clutch for a pure electric multi-speed transmission includes an outer shell 1, the inner side of the outer shell 1 is movably connected to an input gear 11 for transmitting motor torque, the outside of the input gear 11 is fixedly connected to an inner shell 12 for connecting to and mating with the input gear 11, the interior of the outer shell 1 is movably connected to a partition plate 13, the interior of the outer shell 1 is movably connected to a friction plate 14, the inner shell 12 and the friction plate 14 are movably connected through a spline, the friction plate 14 is coaxial with the partition plate 13, the friction plate 14 is coaxial with the back plate 15, and the partition plate 13, the back plate 15 and the friction plate 14 are arranged alternately.

[0022] The outer shell 1 is movably connected to a back plate 15 , and the back plate 15 is fixedly connected to the outside of the back plate 15 to form a hole retaining spring 16 for axially fixing the partition plate 13 , the friction plate 14 and the back plate 15 .

[0023] The external motor drives the input gear 11 to rotate, and the rotation of the input gear 11 drives the inner housing 12 to rotate, and the rotation of the inner housing 12 causes the friction plate 14 to rotate. The partition plate 13 is pushed by the pressure plate 2 to slide on the inner side of the outer housing 1 and contact the friction plate 14. The partition plate 13 slides and pushes the friction plate 14 to contact the back plate 15. The friction plate 14 contacts the partition plate 13 and drives the partition plate 13 to rotate. By combining different numbers of friction plates 14 and partition plates 13, torque and speed adjustment of different gears can be achieved.

[0024] Torque is transmitted through the input gear 11 and the inner housing 12. At the same time, multiple partition plates 13, friction plates 14 and back plates 15 cooperate to realize the transmission of different torques, improving the transmission of high torque and high speed in different gears of the electric drive clutch. The partition plates 13 and friction plates 14 are normally open to increase the operating efficiency of the gearbox.

[0025] Example 2

[0026] See also Figure 1 - Figure 4 A wet clutch for a pure electric multi-speed transmission comprises an outer shell 1,

[0027] The outer shell 1 is internally movably connected to an action pressure plate 2 for controlling the movement of the partition plate 13. A pressure chamber is formed between the action pressure plate 2, the cooperating piston 26 and the action piston 27. The piston housing 21 is movably connected to the output hub 23 through the shaft retaining spring 28.

[0028] The outer shell 1 is internally movably connected to a piston housing 21 for generating a balancing chamber inside the outer shell 1, the piston housing 21 is internally movably connected to a balancing piston 22 for matching the piston housing 21 to form a balancing chamber, the outer shell 1 is internally connected to an output hub 23, the output hub 23 is internally movably connected to a gearbox shaft 24, the external movably connected to the acting pressure plate 2 is a spring disk 25, the spring disk 25 is movably connected to the acting pressure plate 2, and the spring disk 25 is movably connected to the inner wall of the piston housing 21.

[0029] In Example 1, when the clutch is actuated, hydraulic oil flows through the oil hole into the pressure chamber formed between the operating pressure plate 2, the mating piston 26, and the operating piston 27. The pressure in the pressure chamber increases, pushing the operating pressure plate 2 rightward. This rightward movement of the operating pressure plate 2 contracts the spring plate 25, which in turn moves the balancing piston 22 rightward, squeezing the piston housing 21. The operating pressure plate 2 moves rightward until it contacts the partition plate 13. The partition plate 13, pushed by the operating pressure plate 2, moves rightward within the outer housing 1 until it contacts the friction plate 14. At this point, the speeds of the partition plate 13 and friction plate 14 synchronize, indicating the clutch is engaged. The input gear 11 rotates the inner housing 12, which, through the partition plate 13 and friction plate 14, drives the outer housing 1 and the output hub 23. This rotation of the output hub 23 drives the transmission 24 to output torque and speed. Similarly, when the pressure in the pressure chamber formed between the pressure plate 2, the mating piston 26, and the operating piston 27 decreases, the spring plate 25, under its elastic force, pushes the operating pressure plate 2 leftward until it separates from the partition plate 13.

[0030] The internal movability of the acting pressure plate 2 is connected with a mating piston 26, the external movability of the output hub 23 is connected with an acting piston 27 for cooperating with the mating piston 26 inside the outer shell 1 to form a pressure chamber, the external movability of the piston housing 21 is connected with a shaft retaining spring 28, and the inner side of the output hub 23 is movably connected with a sealing ring 29. A balancing chamber is formed between the acting pressure plate 2, the piston housing 21, the balancing piston 22, and the mating piston 26. The output hub 23 is movably connected to the gearbox shaft 24 through a spline, and the acting piston 27 is fixedly connected to the output hub 23. The contact part between the output hub 23 and the gearbox shaft 24 is sealed with a sealing ring 29. There are two sealing rings 29, and the sealing ring 29 is an O-ring model.

[0031] At the same time, the cross-sectional area of ​​the balance chamber formed between the acting pressure plate, piston housing, balance piston, and mating piston is approximately equal to the cross-sectional area of ​​the pressure chamber formed between the acting pressure plate, balance piston, mating piston, and acting piston, thereby making the clutch more stable at different speeds and saving hydraulic transmission kinetic energy. At the same time, the clutch adopts oil heat dissipation to improve the reliability and stability of the electric drive clutch. The electric drive clutch adopts simple mechanical components such as input gear, partition plate, friction plate, back plate, acting pressure plate, piston housing, balance piston, mating piston, etc., which not only reduces the structural space of the electric drive clutch, but also reduces the complexity of the electric drive clutch, and improves the practicality and stability of the electric drive clutch.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. The words "include" or "comprise" and the like used in the present invention mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The technical terms or scientific terms used in the present invention should have the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

Claims

1. A wet clutch for a pure electric multi-speed transmission, comprising an outer shell (1), characterized in that: The inner side of the outer shell (1) is movably connected to an input gear (11) for transmitting motor torque, the outer side of the input gear (11) is fixedly connected to an inner shell (12) for connecting to the matching input gear (11), the inner side of the outer shell (1) is movably connected to a partition plate (13), the inner side of the outer shell (1) is movably connected to a friction plate (14), the inner side of the outer shell (1) is movably connected to a back plate (15), and the outer side of the back plate (15) is fixedly connected to a hole retaining spring (16) for axially fixing the partition plate (13), the friction plate (14), and the back plate (15); The outer shell (1) is movably connected to an action pressure plate (2) for controlling the action of the partition plate (13), the outer shell (1) is movably connected to a piston housing (21) for generating a balance chamber inside the outer shell (1), the piston housing (21) is movably connected to a balance piston (22) for matching the piston housing (21) to form a balance chamber, the outer shell (1) is fixedly connected to an output hub (23), the output hub (23) is movably connected to a gearbox shaft (24), the outer side of the action pressure plate (2) is movably connected to a spring plate (25), the inner side of the action pressure plate (2) is movably connected to a matching piston (26), the outer side of the output hub (23) is movably connected to an action piston (27) for matching with the matching piston (26) to form a pressure chamber, the outer side of the piston housing (21) is movably connected to a shaft retaining spring (28), and the inner side of the output hub (23) is movably connected to a sealing ring (29); A pressure chamber is formed between the action pressure plate (2), the matching piston (26), and the action piston (27), and the piston housing (21) is movably connected to the output hub (23) via a shaft retaining spring (28); A balancing chamber is formed between the action pressure plate (2), the piston housing (21), the balancing piston (22), and the matching piston (26).

2. A wet clutch for a pure electric multi-speed transmission according to claim 1, characterized in that: The inner housing (12) and the friction plate (14) are movably connected via a spline; the friction plate (14) and the partition plate (13) are coaxial; the friction plate (14) and the back plate (15) are coaxial; and the partition plate (13), the back plate (15) and the friction plate (14) are arranged in an alternating manner.

3. The wet clutch for a pure electric multi-speed transmission according to claim 1, characterized in that: The spring disk (25) is movably connected to the action pressure disk (2), and the spring disk (25) is movably connected to the inner wall of the piston housing (21).

4. A wet clutch for a pure electric multi-speed transmission according to claim 1, characterized in that: The output hub (23) is movably connected to the gearbox shaft (24) via a spline, and the action piston (27) is fixedly connected to the output hub (23).

5. The wet clutch for a pure electric multi-speed transmission according to claim 1, characterized in that: The contact portion between the output hub (23) and the gearbox shaft (24) is sealed by a sealing ring (29), the number of the sealing rings (29) is two, and the sealing rings (29) are of the O-ring type.

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