Single-drive dual-clutch, reduction gearbox and electric vehicle

Abstract

The present application relates to the field of transmissions, and in particular to a single-drive dual clutch, a reduction gearbox and an electric vehicle. The single-drive dual clutch comprises a first clutch assembly, a second clutch assembly and an operating mechanism; the first clutch assembly and the second clutch assembly are arranged adjacent to each other in the axial direction; the operating mechanism is arranged between the first clutch assembly and the second clutch assembly; the first clutch assembly has a closed state and a disconnected state, and the second clutch assembly has a closed state and a disconnected state; the operating mechanism can control the first clutch assembly to be in a closed state and the second clutch assembly to be in a disconnected state, or the operating mechanism can control the first clutch assembly to be in a disconnected state and the second clutch assembly to be in a closed state. The present application is applied to a two-speed transmission of an electric vehicle, and only one set of operating mechanisms is needed to control the two clutch assemblies, the structure is simple, the volume can be effectively controlled, and the manufacturing cost can be effectively saved.

Description

Technical Field

[0001] The present application relates to the field of transmissions, and in particular to a single-drive dual-clutch transmission, a reduction gearbox and an electric vehicle. Background Art

[0002] The clutch is located between the engine and the transmission. It is the switch for the power transmission between the engine and the transmission. It is a transmission mechanism that can both transmit and cut off power. Its main function is to ensure that the car can start smoothly, reduce the impact load of the transmission gear when shifting gears, and prevent the transmission system from overloading.

[0003] The dual clutch can utilize the characteristics of two clutch components to enable the vehicle to shift gears without interrupting the power, that is, to control the gearbox by switching between the two clutches, which not only makes the driving of the car easier, but also effectively improves the comfort, power and safety of the car. The dual clutch is responsible for important functions such as gear shifting, starting control, power transmission, torsional vibration reduction, overload protection, etc., and is a key component of the dual clutch transmission system.

[0004] In the existing dual clutch, the engagement and disengagement of the two clutch components are usually controlled by an independent set of operating mechanisms, and an automatic hydraulic control system is usually required to control the two independent sets of operating mechanisms, such as the dual clutch disclosed in application publication number CN107013605B and the dual clutch disclosed in application publication number CN103154550B. This automatic control system has a complex structure and is difficult to use in vehicles with limited space and low cost, such as electric vehicles.

[0005] At present, some dual clutches have attempted to use a set of operating mechanisms to control the engagement and disengagement of two clutch components. For example, the dual clutch disclosed in application publication number CN104500616 A relies on the joint action of two sets of springs for control. Its structure is still slightly complex and requires high manufacturing precision.

[0006] For the dual-clutch vehicle used in electric vehicles, the inventors have also tried to use a set of operating mechanisms to control the engagement and disengagement of the two clutch components in order to optimize the structure and control its cost. Summary of the invention

[0007] In order to optimize and improve a dual clutch that uses a set of operating mechanisms to control the engagement and disengagement of two clutch components, the present application provides a single-drive dual clutch, a reduction gearbox and an electric vehicle.

[0008] The single-drive dual clutch provided in this application adopts the following technical solution:

[0009] In a first aspect, the present application provides a single-drive dual clutch, which adopts the following technical solution:

[0010] A single-drive dual clutch comprises a first clutch assembly, a second clutch assembly, and an operating mechanism;

[0011] The first clutch assembly and the second clutch assembly are arranged adjacent to each other in the axial direction; the operating mechanism is arranged between the first clutch assembly and the second clutch assembly;

[0012] The first clutch assembly, the second clutch assembly and the operating mechanism have a hollow space in the axial direction, and the shaft hub is arranged in the hollow space for passing through;

[0013] The first clutch assembly has a closed state and an open state, and the second clutch assembly has a closed state and an open state;

[0014] The operating mechanism can control the first clutch assembly to be in a closed state and the second clutch assembly to be in a disconnected state, or the operating mechanism can control the first clutch assembly to be in a disconnected state and the second clutch assembly to be in a closed state.

[0015] By adopting the above technical solution, two clutch assemblies are controlled by a set of operating mechanisms to achieve a closed state of one clutch assembly and a disconnected state of the other clutch assembly. This is applied to a two-speed gearbox of an electric vehicle. Since the gearbox of an electric vehicle does not require a neutral gear, one of the clutch assemblies is in a normally closed clutch state. Only one set of operating mechanisms is needed to control the two clutch assemblies. This has a simple structure, effectively controllable volume, and effectively saved manufacturing costs.

[0016] Optionally, the first clutch assembly is provided with a first outer shell, a first inner shell, and a first clutch; the first clutch is provided between the first outer shell and the first inner shell;

[0017] The second clutch assembly is provided with a second outer shell, a second inner shell, and a second clutch; the second clutch is provided between the second outer shell and the second inner shell,

[0018] The first clutch and the second clutch both include friction plates, separator plates, and back plates; a plurality of the friction plates and a plurality of the separator plates are alternately arranged in groups, and the back plates are arranged on the outside of the friction plates and the separator plates alternately arranged in groups;

[0019] One of the friction plate and the separation plate is arranged on the first outer shell and the second outer shell, and the other of the friction plate and the separation plate is arranged on the first inner shell and the second inner shell;

[0020] The first clutch is a normally closed clutch, and the second clutch is a normally open clutch.

[0021] By adopting the above technical solution, the structural composition and composition relationship of two clutch components are disclosed.

[0022] Optionally, the operating mechanism includes a pushing mechanism and a resetting mechanism;

[0023] The pushing mechanism includes a piston, a thrust bearing, and a thrust ring. The piston is used to push the thrust bearing to drive the thrust ring to move; the thrust ring is used to intermittently contact the first clutch component or the second clutch component and push it to move;

[0024] The reset mechanism comprises an elastic component, and the elastic component is used to continuously contact the thrust ring and can push the thrust ring to move.

[0025] By adopting the above technical solution, the composition and connection relationship of the operating mechanism are disclosed. The piston pushes the thrust bearing to drive the thrust ring to move, and then the thrust ring drives the clutch assembly to move, so that the friction plate and the separation plate of the clutch are in contact or separated, thereby realizing the control of the clutch assembly.

[0026] Optionally, the thrust ring includes two integral ends, one end of which is provided with a semi-enclosed portion, and the other end is provided with a first pushing portion, a second pushing portion, and a supporting portion, the semi-enclosed portion is provided on one side of the supporting portion, and the first pushing portion and the second pushing portion are provided on the other side of the supporting portion;

[0027] A pressure chamber is formed between the semi-enclosed portion of one end of the thrust ring and the shaft hub, and the piston and the thrust bearing are arranged in the pressure chamber; a liquid channel is arranged on the shaft hub, and the liquid channel is connected with the pressure chamber;

[0028] The first pushing portion and the second pushing portion of the other end of the thrust ring are respectively arranged at the first clutch assembly and the second clutch assembly.

[0029] By adopting the above technical solution, the structural composition and positional relationship of the thrust ring are disclosed. A pressure chamber is formed between the thrust ring and the shaft hub, and the thrust bearing is driven by the piston to move in the pressure chamber, so that the thrust ring moves after being pressurized, thereby driving the other end to move and changing the state of the clutch assembly.

[0030] Optionally, the first pushing portion passes through the first outer shell of the first clutch assembly and can contact or separate from the first clutch;

[0031] The second pushing portion penetrates the second outer shell of the second clutch assembly and can contact or separate from the second clutch;

[0032] Moreover, at the same time, only one of the first pushing portion and the first clutch and the second pushing portion and the second clutch can be in a conflicting state.

[0033] By adopting the above technical solution, the positional relationship and the functional relationship between the thrust ring and the first clutch assembly and the second clutch assembly are disclosed.

[0034] Optionally, the elastic component is a disc spring or a compression spring, one end of the elastic component is fixedly disposed on the first outer shell of the first clutch assembly, and the other end of the elastic component is disposed in contact with the first pushing portion near the side wall of the second clutch assembly.

[0035] By adopting the above technical solution, the selection of two reset mechanisms is disclosed. The elastic component selects a disc spring or a compressed spring, both of which are compressed elastic components. They can act on the first pushing part of the thrust ring through their own force to restore to normal state, thereby pushing the first pushing part to move and restoring the clutch to its original state. The first clutch is a normally closed clutch, and the second clutch is a normally open clutch. The elastic component pushes the first pushing part to move, so that the clutch returns to its original closed state. It can be seen that other compressed elastic components can also achieve the above functions.

[0036] Optionally, the elastic component is a tension spring, one end of the elastic component is fixedly disposed on the second outer shell of the second clutch assembly, and the other end of the elastic component is fixedly disposed on the second pushing portion near the side wall of the first clutch assembly.

[0037] By adopting the above technical solution, a selection of a reset mechanism is disclosed. The elastic component selects a stretched spring, which is an elastic component in a stretched state. It can act on the second pushing part of the thrust ring through its own force to restore to normal state, thereby pushing the second pushing part to move and restoring the clutch to its original state. The first clutch is a normally closed clutch, and the second clutch is a normally open clutch. The elastic component pushes the second pushing part to move, so that the clutch returns to its original disconnected state. It can be seen that other elastic components in a stretched state can also achieve the above functions.

[0038] Optionally, the first clutch assembly is further provided with a first arcuate plate, and the first arcuate plate is provided on a side of the first clutch away from the back plate of the second clutch assembly;

[0039] The second clutch assembly is further provided with a second arcuate plate, and the second arcuate plate is provided on a side of the second clutch away from the back plate of the first clutch assembly;

[0040] The first arcuate sheet body and the second arcuate sheet body are provided with a first protective ring and a second protective ring on the side away from the back plate.

[0041] By adopting the above technical solution, a clutch is disclosed in which a bow-shaped plate is arranged, and a protective ring is arranged outside the bow-shaped plate. The bow-shaped plate can play a certain buffering role on the clutch back plate, and the protective ring can constrain the position of the bow-shaped plate.

[0042] In a second aspect, the present application provides a gearbox, which adopts the following technical solution:

[0043] A gearbox comprises the aforementioned single-drive dual clutch.

[0044] By adopting the above technical solution, two clutch assemblies are controlled by a set of operating mechanisms, and only one pressure valve is needed to provide pressure for the operating mechanism, thereby driving the operating mechanism to control the two clutch assemblies. Therefore, the gearbox structure can be simple, the volume is small, and the manufacturing cost can be effectively saved.

[0045] In a third aspect, the present application provides an electric vehicle, which adopts the following technical solution:

[0046] An electric vehicle comprises the aforementioned gearbox.

[0047] By adopting the above technical solution, two clutch assemblies are controlled by a set of operating mechanisms and applied to the two-speed gearbox of an electric vehicle. Since the gearbox of the electric vehicle does not need a neutral gear, one of the clutch assemblies is in a normally closed clutch state. Only one set of operating mechanisms is needed to control the two clutch assemblies. The structure is simple, the volume can be effectively controlled, and the manufacturing cost can be effectively saved.

[0048] The present application includes at least one of the following beneficial technical effects:

[0049] 1. This application controls two clutch assemblies through a set of operating mechanisms to achieve a closed state of one clutch assembly and a disconnected state of the other. It is applied to a two-speed gearbox of an electric vehicle. Since the gearbox of an electric vehicle does not require a neutral gear, one of the clutch assemblies is in a normally closed clutch state. Only one set of operating mechanisms is needed to control the two clutch assemblies. The structure is simple, the volume can be effectively controlled, and the manufacturing cost can be effectively saved.

[0050] 2. The reset mechanism of the present application selects a disc spring or a compression spring or a tension spring, etc., which can act on the thrust ring through its own force to restore to normal state, so that the clutch returns to its original state. The structure is simple and the effect is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 The present invention is a three-dimensional structural schematic diagram of an embodiment of a single-drive dual-clutch.

[0052] Figure 2 The present invention is a schematic diagram of the main structure of an embodiment of a single-drive dual-clutch.

[0053] Figure 3 The present invention is a schematic cross-sectional structural diagram of an embodiment of a single-drive dual-clutch.

[0054] Figure 4 The present invention is a three-dimensional structural schematic diagram of an embodiment of a single-drive dual clutch with gears arranged on both sides.

[0055] Figure 5 The present invention is a schematic diagram of the main structure of an embodiment of a single-drive dual clutch with gear states arranged on both sides.

[0056] Figure 6 The present invention is a cross-sectional structural schematic diagram of an embodiment of a single-drive dual clutch with gears arranged on both sides.

[0057] Description of reference numerals:

[0058] 1. First clutch assembly; 2. Second clutch assembly; 3. Operating mechanism; 11. First outer shell; 12. First inner shell; 13. First clutch; 14. First bow-shaped sheet; 15. First protective ring; 21. Second outer shell; 22. Second inner shell; 23. Second clutch; 24. Second bow-shaped sheet; 25. Second protective ring; 131. Friction plate; 132. Separating plate; 133. Back plate; 31. Piston; 32. Thrust bearing; 33. Thrust ring; 34. Elastic component; 331. Half-wrapped portion; 332. Support portion; 333. First pushing portion; 334. Second pushing portion; 4. Hub; 41. Liquid channel; 5. Rolling bearing; 6. Gear. DETAILED DESCRIPTION

[0059] The present application is further described in detail below in conjunction with the accompanying drawings.

[0060] Example 1

[0061] Reference Figure 1-3 , an embodiment of the present application discloses a single-drive dual clutch.

[0062] In this embodiment, the single-drive dual clutch includes a first clutch assembly 1, a second clutch assembly 2, and an operating mechanism 3. The first clutch assembly 1 and the second clutch assembly 2 are arranged adjacent to each other in the axial direction; the operating mechanism 3 is arranged between the first clutch assembly 1 and the second clutch assembly 2. The first clutch assembly 1, the second clutch assembly 2, and the operating mechanism 3 have a hollow space in the axial interior, and the shaft hub 4 is arranged in the hollow space. The first clutch assembly 1 has a closed state and a disconnected state, and the second clutch assembly 2 has a closed state and a disconnected state. The operating mechanism 3 can control the first clutch assembly 1 to be in a closed state and the second clutch assembly 2 to be in a disconnected state, or the operating mechanism 3 can control the first clutch assembly 1 to be in a disconnected state and the second clutch assembly 2 to be in a closed state.

[0063] In this embodiment, the first clutch assembly 1 is provided with a first outer shell 11, a first inner shell 12, and a first clutch 13, and the first clutch 13 is arranged between the first outer shell 11 and the first inner shell 12. The second clutch assembly 2 is provided with a second outer shell 21, a second inner shell 22, and a second clutch 23; the second clutch 23 is arranged between the second outer shell 21 and the second inner shell 22. The first clutch 13 and the second clutch 23 each include a friction plate 131, a separator plate 132, and a back plate 133, wherein the friction plate 131 and the separator plate 132 have multiple plates, and the friction plates 131 and the separator plates 132 are arranged alternately, and each clutch has two back plates 133, and the back plates 133 are arranged on the outer side of the friction plates 131 and the separator plates 132 arranged alternately in a group. The friction plate 131 is arranged on the first outer shell 11, and the separator plate 132 is arranged on the second inner shell 22. In addition, the first clutch 13 is a normally closed clutch, and the second clutch 23 is a normally open clutch.

[0064] In this embodiment, the operating mechanism 3 includes a pushing mechanism and a reset mechanism. The pushing mechanism includes a piston 31, a thrust bearing 32, and a thrust ring 33. The piston 31 is used to push the thrust bearing 32 to drive the thrust ring 33 to move; the thrust ring 33 is used to intermittently contact with the first clutch component 1 or the second clutch component 2 and push it to move. The thrust ring 33 includes two ends formed as one body, one end of which is provided with a semi-enclosed portion 331, and the other end is provided with a first pushing portion 333, a second pushing portion 334, and a supporting portion 332. The semi-enclosed portion 331 is arranged on one side of the supporting portion 332, and the first pushing portion 333 and the second pushing portion 334 are arranged on the other side of the supporting portion 332. A pressure chamber is formed between the semi-enclosed portion 331 at one end of the thrust ring 33 and the shaft hub 4, and the piston 31 and the thrust bearing 32 are arranged in the pressure chamber; a liquid channel 41 is provided on the shaft hub 4, and the liquid channel 41 is connected to the pressure chamber.

[0065] In this embodiment, the first pushing portion 333 and the second pushing portion 334 at the other end of the thrust ring 33 are respectively arranged at the first clutch assembly 1 and the second clutch assembly 2. In a normal state, the first pushing portion 333 penetrates the first outer shell 11 of the first clutch assembly 1 and contacts the first clutch 13. The second pushing portion 334 penetrates the second outer shell 21 of the second clutch assembly 2 and separates from the second clutch 23. That is, the first clutch 13 is a normally closed clutch, and the second clutch 23 is a normally open clutch. When pushed, the first pushing portion 333 separates from the first clutch 13, and the second pushing portion 334 closes with the second clutch 23. The piston 31 pushes the thrust bearing 32 to drive the thrust ring 33 to move, and then the thrust ring 33 drives the clutch assembly to move, so that the friction plate 131 and the separation plate 132 of the clutch are in contact or separated, thereby realizing the control of the clutch assembly.

[0066] In this embodiment, the reset mechanism includes an elastic component 34, which is a disc spring. One end of the disc spring is fixedly arranged on the first outer shell 11 of the first clutch assembly 1, and the other end of the disc spring is arranged to abut against the first pushing portion 333 near the side wall of the second clutch assembly 2. The disc spring is used to continuously contact the first pushing portion 333 of the thrust ring 33 and can push the first pushing portion 333 to move.

[0067] In this embodiment, the first clutch assembly 1 is further provided with a first arcuate sheet 14, which is arranged on the side of the first clutch 13 away from the back plate 133 of the second clutch assembly 2; the second clutch assembly 2 is further provided with a second arcuate sheet 24, which is arranged on the side of the second clutch 23 away from the back plate 133 of the first clutch assembly 1; the first arcuate sheet 14 and the second arcuate sheet 24 are provided with a first protective ring 15 and a second protective ring 25 on the side away from the back plate 133. Protective rings are provided on the outside of the arcuate sheets, and the arcuate sheets can play a certain buffering role on the clutch back plate 133, and the protective rings can constrain the position of the arcuate sheets.

[0068] Example 2

[0069] This embodiment discloses a single-drive dual clutch. The difference between this embodiment and embodiment 1 is that the elastic component 34 of the reset mechanism is a compressed spring, one end of which is fixedly arranged on the first outer shell 11 of the first clutch assembly 1, and the other end of the elastic component 34 is arranged to abut against the first pushing portion 333 near the side wall of the second clutch assembly 2, and the compressed spring is used to continuously contact the first pushing portion 333 of the thrust ring 33 and can push the first pushing portion 333 to move. No drawings are provided for this embodiment.

[0070] Example 3

[0071] This embodiment discloses a single-drive dual clutch. The difference between this embodiment and embodiment 1 is that the elastic component 34 of the reset mechanism is a tension spring, one end of which is fixedly arranged on the second outer shell 21 of the second clutch assembly 2, and the other end of which is fixedly arranged on the second pushing portion 334 near the side wall of the first clutch assembly 1. The tension spring is used to continuously contact the second pushing portion 334 of the thrust ring 33 and can pull the second pushing portion 334 to move. No drawings are provided in this embodiment.

[0072] Example 4

[0073] Reference Figure 4-6 This embodiment discloses a single-drive dual clutch. The difference between this embodiment and embodiment 1 is that the first clutch assembly 1, the second clutch assembly 2, and the operating mechanism 3 have a hollow space in the axial direction, and a hub 4 is arranged in the hollow space. The hub 4 extends out of the first clutch assembly 1 and the second clutch assembly 2, and gears 6 are arranged at both ends thereof through rolling bearings 5.

[0074] In the above embodiment, the single-drive dual clutch uses a set of operating mechanisms 3 to control two clutch components, sharing the piston 31, thrust bearing 32, and thrust ring 33. Only one set of operating mechanisms 3 is needed to control the two clutch components, the structure is simple, the volume can be effectively controlled, and the manufacturing cost can be effectively saved.

[0075] The present application also discloses a gearbox and an electric vehicle using the single-drive dual-clutch in the above embodiment. The single-drive dual-clutch of the present application is applied to a two-speed gearbox of an electric vehicle. Since the gearbox of the electric vehicle does not need a neutral gear, one of the clutches is in a normally closed clutch state and the other is in a normally open clutch state. Only one set of operating mechanism 3 is needed to control the two clutch components to change the closed and open states. The structure is simple, the volume can be effectively controlled, and the manufacturing cost can be effectively saved.

[0076] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A single-drive dual clutch, characterized in that: It comprises a first clutch assembly (1), a second clutch assembly (2), and an operating mechanism (3); The first clutch assembly (1) and the second clutch assembly (2) are arranged adjacent to each other in the axial direction; the operating mechanism (3) is arranged between the first clutch assembly (1) and the second clutch assembly (2); The first clutch assembly (1), the second clutch assembly (2) and the operating mechanism (3) have a hollow space axially inside, and the shaft hub (4) is arranged in the hollow space for passing through; The first clutch assembly (1) has a closed state and an open state, and the second clutch assembly (2) has a closed state and an open state; The operating mechanism (3) is capable of controlling the first clutch assembly (1) to be in a closed state and the second clutch assembly (2) to be in an open state, or the operating mechanism (3) is capable of controlling the first clutch assembly (1) to be in an open state and the second clutch assembly (2) to be in a closed state; The operating mechanism (3) comprises a pushing mechanism and a resetting mechanism; The pushing mechanism comprises a piston (31), a thrust bearing (32), and a thrust ring (33); the piston (31) is used to push the thrust bearing (32) to drive the thrust ring (33) to move; the thrust ring (33) is used to intermittently contact the first clutch component (1) or the second clutch component (2) and push them to move; The reset mechanism comprises an elastic component (34), wherein the elastic component (34) is used to continuously contact the thrust ring (33) and is capable of pushing the thrust ring (33) to move; The thrust ring (33) comprises two integrally formed ends, one end of which is provided with a semi-enclosed portion (331), and the other end is provided with a first pushing portion (333), a second pushing portion (334), and a supporting portion (332), the semi-enclosed portion (331) being arranged on one side of the supporting portion (332), and the first pushing portion (333) and the second pushing portion (334) being arranged on the other side of the supporting portion (332); A pressure chamber is formed between the semi-enclosed portion (331) at one end of the thrust ring (33) and the shaft hub (4), and the piston (31) and the thrust bearing (32) are arranged in the pressure chamber; a liquid channel (41) is provided on the shaft hub (4), and the liquid channel (41) is connected to the pressure chamber; The first pushing portion (333) and the second pushing portion (334) at the other end of the thrust ring (33) are respectively arranged at the first clutch assembly (1) and the second clutch assembly (2).

2. A single-drive dual clutch according to claim 1, characterized in that: The first clutch assembly (1) is provided with a first outer shell (11), a first inner shell (12), and a first clutch (13); the first clutch (13) is arranged between the first outer shell (11) and the first inner shell (12); The second clutch assembly (2) is provided with a second outer shell (21), a second inner shell (22), and a second clutch (23); the second clutch (23) is arranged between the second outer shell (21) and the second inner shell (22). The first clutch (13) and the second clutch (23) both comprise a friction plate (131), a separator plate (132), and a back plate (133); a plurality of the friction plates (131) and a plurality of the separator plates (132) are alternately arranged in a group, and the back plate (133) is arranged on the outside of the friction plates (131) and the separator plates (132) that are alternately arranged in a group; One of the friction plate (131) and the separation plate (132) is arranged on the first outer shell (11) and the second outer shell (21), and the other of the friction plate (131) and the separation plate (132) is arranged on the first inner shell (12) and the second inner shell (22); The first clutch (13) is a normally closed clutch, and the second clutch (23) is a normally open clutch.

3. A single-drive dual clutch according to claim 2, characterized in that: The first pushing portion (333) penetrates the first outer shell (11) of the first clutch assembly (1) and is capable of contacting or separating from the first clutch (13); The second pushing portion (334) penetrates the second outer shell (21) of the second clutch assembly (2) and is capable of contacting or separating from the second clutch (23); Furthermore, at the same time, only one of the first pushing portion (333) and the first clutch (13), and the second pushing portion (334) and the second clutch (23) can be in a conflicting state.

4. A single-drive dual clutch according to claim 3, characterized in that: The elastic component (34) is a disc spring or a compression spring. One end of the elastic component (34) is fixedly arranged on the first outer shell (11) of the first clutch assembly (1), and the other end of the elastic component (34) is arranged in abutment with the first pushing portion (333) near the side wall of the second clutch assembly (2).

5. The single-drive dual clutch according to claim 3, characterized in that: The elastic component (34) is a tension spring, one end of the elastic component (34) is fixedly arranged on the second outer shell (21) of the second clutch assembly (2), and the other end of the elastic component (34) is fixedly arranged on the second pushing portion (334) near the side wall of the first clutch assembly (1).

6. The single-drive dual clutch according to claim 2, characterized in that: The first clutch assembly (1) is further provided with a first bow-shaped plate (14), and the first bow-shaped plate (14) is arranged on a side of the first clutch (13) away from the back plate (133) of the second clutch assembly (2); The second clutch assembly (2) is further provided with a second arcuate plate (24), and the second arcuate plate (24) is arranged on a side of the second clutch (23) away from the back plate (133) of the first clutch assembly (1); A first protective ring (15) and a second protective ring (25) are provided on the side of the first arched sheet (14) and the second arched sheet (24) away from the back plate (133).

7. A gearbox, characterized in that: Including the single-drive dual clutch as described in any one of claims 1-6.

8. An electric vehicle, characterized in that: Including the gearbox as described in claim 7.

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