Double-clutch structure and hybrid electric vehicle

Abstract

The utility model relates to the technical field of automobiles, in particular to a double-clutch structure and a hybrid electric vehicle, the double-clutch structure comprises a first clutch and a second clutch, the first clutch comprises a first transmission disc assembly for clutch transmission and a third transmission disc assembly used for being connected to an engine; the second clutch comprises a second transmission disc assembly in clutch transmission and a fourth transmission disc assembly used for being connected to a motor. The first transmission disc assembly and the second transmission disc assembly are rotationally connected to the clutch support, so that the first transmission disc assembly and the second transmission disc assembly form a synchronous rotation connection relation, and multiple power transmission modes can be achieved through simultaneous locking of the first clutch and the second clutch when necessary. And secondly, the clutch support forms a connecting structure for synchronous rotation between the first transmission disc assembly and the second transmission disc assembly, so that the reliability of synchronous rotation and the transmission reliability of the hybrid electric vehicle with the double-clutch structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, specifically to a dual-clutch structure and a hybrid vehicle. Background Technology

[0002] Hybrid electric vehicles typically employ multiple clutches in their powertrain systems to achieve power output from the engine and electric motor, as well as power transmission between them. The engine and motor output power is delivered to loads such as the drive wheels. Power transmission between the engine and motor primarily utilizes the engine's power to drive the motor, thereby charging the battery connected to the motor. Existing technology includes a transmission system where two clutches are involved in the power output or transmission path between the engine and motor. These clutches achieve their engagement / disengagement function through selective frictional transmission between two sets of transmission disc assemblies. Through the engagement and disengagement of these clutches, the powertrain system can achieve various power transmission methods, including but not limited to: individual engine or motor power output, coupled engine and motor power output, and battery charging. One method of clutch engagement / disengagement involves both clutches being locked simultaneously, with one set of transmission disc assemblies from one clutch rotating synchronously with the other to transmit power. However, the connection structure between the two clutches in existing transmission systems is complex, and the power transmission path between the two clutches requires numerous connecting components, resulting in low reliability of the synchronous rotation of the transmission disc assemblies between the two clutches, thus reducing the overall reliability of the transmission system. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-clutch structure and a hybrid vehicle to solve the problem of complex connection structure between two clutches with transmission connection in the prior art, and to improve the reliability of the vehicle transmission system.

[0004] To achieve the above objectives, the technical solution of this utility model includes: a dual-clutch structure, comprising a first clutch and a second clutch, wherein the first clutch includes a first transmission disc assembly and a third transmission disc assembly for clutch transmission, and the second clutch includes a second transmission disc assembly and a fourth transmission disc assembly for clutch transmission, wherein the third transmission disc assembly of the first clutch is used to connect to an engine, and the fourth transmission disc assembly of the second clutch is used to connect to a motor; and further comprising a clutch bracket, wherein the first transmission disc assembly and the second transmission disc assembly are respectively disposed on the clutch bracket, and the first transmission disc assembly and the second transmission disc assembly are respectively rotatably connected to the clutch bracket, thereby forming a synchronous rotational connection relationship between the first transmission disc assembly and the second transmission disc assembly.

[0005] In one embodiment, the clutch bracket has a first mounting structure and a second mounting structure spaced apart along its axial direction, the first transmission disk assembly is disposed on the first mounting structure, the second transmission disk assembly is disposed on the second mounting structure, and the outer diameter of the first mounting structure is smaller than the outer diameter of the second mounting structure.

[0006] In one embodiment, the first drive disk assembly is provided with a first limiting disk located at one end near the second mounting structure. The first mounting structure and the second mounting structure form a first limiting surface by radial misalignment between them. The first limiting disk abuts against the first limiting surface to form an axial unidirectional limiting of the first drive disk assembly and the third drive disk assembly. The first drive disk assembly and the third drive disk assembly are engaged by means of the axial unidirectional limiting.

[0007] In one embodiment, the fourth transmission disk assembly is provided with a second limiting disk located at the end of the fourth transmission disk assembly. The fourth transmission disk assembly is disposed on a motor rotating assembly and connected to a motor. The motor rotating assembly is used to output power to the motor or input power to the motor. The motor rotating assembly is provided with a second limiting surface. The second limiting disk abuts against the second limiting surface to form an axial one-way limiting of the fourth transmission disk assembly. The second transmission disk assembly and the fourth transmission disk assembly are engaged by means of the axial one-way limiting.

[0008] In one embodiment, the first mounting structure and the first transmission disk assembly are connected via a gear transmission structure, such that the first transmission disk assembly is rotatably connected to the clutch bracket; the second mounting structure and the second transmission disk assembly are connected via a gear transmission structure, such that the second transmission disk assembly is rotatably connected to the clutch bracket.

[0009] In one embodiment, the first transmission disc assembly and the second transmission disc assembly are arranged at an axial distance along the clutch bracket. The first clutch is provided with a first pressure plate assembly, and the second clutch is provided with a second pressure plate assembly. The first pressure plate assembly and the second pressure plate assembly are respectively disposed at both ends of the clutch bracket in the axial direction, and the first transmission disc assembly and the second transmission disc assembly are located between the first pressure plate assembly and the second pressure plate assembly.

[0010] In one embodiment, the clutch bracket has a first pressure plate mounting portion extending in the direction of the first pressure plate assembly, the first pressure plate assembly including a first pressure plate slidably fitted onto the first pressure plate mounting portion.

[0011] In one embodiment, the clutch bracket has an annular second mounting portion, the second transmission plate assembly is disposed radially outside the second mounting portion, a cavity is formed radially inside the second mounting portion, the second pressure plate assembly is disposed on a rotating bracket, the rotating bracket has a second pressure plate mounting portion for mounting the second pressure plate assembly, a portion of the second pressure plate mounting portion extends into the cavity.

[0012] In one embodiment, the rotating bracket is connected to the power output shaft of the motor and forms part of the motor rotating assembly.

[0013] In one embodiment, the second pressure plate assembly includes a second pressure plate, and the rotating bracket is provided with a second pressure plate driving part located on one side of the second pressure plate. The second pressure plate and the second pressure plate driving part together form a hydraulic driving cavity, which is used to drive the second pressure plate to move in the direction of engaging the second transmission plate assembly and the fourth transmission plate assembly by hydraulic pressure therein.

[0014] The technical solution of this utility model also includes: a hybrid electric vehicle, comprising the above-mentioned dual-clutch structure.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model achieves synchronous rotation of the first and second transmission disc assemblies by mounting them on a clutch bracket, thereby enabling multiple power transmission methods when necessary by simultaneously locking the first and second clutches. Both the first and second transmission disc assemblies are mounted on the clutch bracket, which forms a synchronous rotation connection structure between them. This simplifies the connection structure between the first and second transmission disc assemblies, improves the reliability of synchronous rotation, and thus enhances the transmission reliability of the transmission system.

[0017] 2. The first clutch and the second clutch are arranged axially spaced along the clutch bracket, and the outer diameters of the first mounting structure and the second mounting structure are different. The first limiting surface formed between the first mounting structure and the second mounting structure can restrict the axial unidirectional movement of the first transmission disc assembly and the third transmission disc assembly, thereby enabling the first clutch to enter a transmission state. The second limiting surface of the motor rotating assembly, which is fitted outside the first clutch, can restrict the axial unidirectional movement of the second transmission disc assembly and the fourth transmission disc assembly, thereby enabling the second clutch to enter a transmission state. Therefore, the clutch bracket not only serves to mount the first transmission disc assembly and the second transmission disc assembly, but also assists the first clutch in entering a transmission state; while the motor rotating assembly not only serves to output or input power, but also assists the second clutch in entering a transmission state.

[0018] 3. The outer diameters of the first mounting structure and the second mounting structure are different, which allows the motor rotating assembly connected to the second clutch and the engine power input shaft connected to the first clutch to be axially sleeved, making the transmission system structure more compact.

[0019] 4. The first clutch and the second clutch are arranged axially spaced along the clutch bracket, and the first transmission plate assembly and the second transmission plate assembly are located between the first pressure plate assembly and the second pressure plate assembly, making the distance between the first clutch and the second clutch more compact. The clutch bracket extends axially to one side to form a first pressure plate mounting part, and the other side forms a cavity through a second mounting part with an annular structure. The rotating bracket extends into the cavity. The structure of each part is fully utilized, making the overall layout of the dual clutch structure more compact and optimizing the layout of the transmission system.

[0020] 5. The rotating bracket is also part of the motor rotating assembly, so the motor rotating assembly has the function of inputting or outputting power. Through the hydraulic drive chamber formed with the second pressure plate and the aforementioned second limiting surface, it also plays the role of driving the second clutch to switch to the transmission state. Attached Figure Description

[0021] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0022] Figure 2 This is a cross-sectional view of only a portion of the structural components of an embodiment of this utility model.

[0023] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0024] Among them: C1 is the first clutch, C2 is the second clutch, and M is the motor;

[0025] 11 First transmission disc assembly, 111 First limiting disc, 12 Third transmission disc assembly, 13 First pressure disc assembly, 131 First pressure disc, 132 First return spring, 133 First pressure disc drive component, 134 First hydraulic drive chamber, 135 First hydraulic return chamber, 21 Second transmission disc assembly, 222 Fourth transmission disc assembly, 221 Second limiting disc, 23 Second pressure disc assembly, 231 Second pressure disc, 232 Second return spring, 233 Second pressure disc return component, 234 Second hydraulic drive chamber Drive chamber, 235 second hydraulic reset chamber, 3 clutch bracket, 30 bracket shaft, 31 first mounting part, 311 first mounting structure, 32 second mounting part, 321 second mounting structure, 33 first limiting surface, 34 first pressure plate mounting part, 4 motor rotating assembly, 41 motor shaft, 411 second limiting surface, 42 motor output shaft, 43 rotating bracket, 431 second pressure plate mounting part, 432 second pressure plate drive part, 5 engine input shaft, 6 power output shaft, 7 sun gear. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] See Figures 1 to 3 As shown, this utility model discloses a dual-clutch structure, including a first clutch C1 and a second clutch C2. The first clutch C1 includes a first transmission disc assembly 11 and a third transmission disc assembly 12 for clutch transmission, and the second clutch C2 includes a second transmission disc assembly 21 and a fourth transmission disc assembly 22 for clutch transmission. The third transmission disc assembly 12 of the first clutch C1 is used to connect to an engine (not shown in the figure), and the fourth transmission disc assembly 22 of the second clutch C2 is used to connect to a motor M. Through the clutch transmission of the first clutch C1 and the second clutch C2, multiple transmission modes of the automotive transmission system can be realized.

[0028] It also includes a clutch bracket 3, with a first transmission disc assembly 11 and a second transmission disc assembly 21 respectively disposed on the clutch bracket 3, and the first transmission disc assembly 11 and the second transmission disc assembly 21 respectively forming a rotatable connection with the clutch bracket 3, thereby forming a synchronous rotational connection between the first transmission disc assembly 11 and the second transmission disc assembly 21.

[0029] This invention achieves synchronous rotation of the first transmission disc assembly 11 and the second transmission disc assembly 21 by mounting them on the clutch bracket 3. This allows for multiple power transmission methods when necessary, achieved by simultaneously locking the first clutch C1 and the second clutch C2. Specifically, when the first clutch C1 and the second clutch C2 are simultaneously locked, the following two power transmission methods are possible: ① The engine power is transmitted to the first clutch C1, and then the synchronous rotation of the first transmission disc assembly 11 and the second transmission disc assembly 21 transmits the power of the first clutch C1 to the second clutch C2, inputting power to the motor M. The motor rotating assembly 4 rotates in the direction required for charging, thereby charging the battery (not shown in the figure) connected to the motor M; ② The engine power is transmitted to the first clutch C1, the motor M outputs power and this power is transmitted to the second clutch C2, and then the synchronous rotation of the first transmission disc assembly 11 and the second transmission disc assembly 21 couples the power of the engine and the motor M, allowing them to output power together. For a specific transmission system, those skilled in the art will select one of the two power transmission methods mentioned above based on actual needs, which will not be elaborated here.

[0030] Both the first transmission disc assembly 11 and the second transmission disc assembly 21 are mounted on the clutch bracket 3. The clutch bracket 3 forms a synchronous rotation connection structure between the two, simplifying the connection structure between the first transmission disc assembly 11 and the second transmission disc assembly 21, improving the reliability of synchronous rotation, and thus improving the transmission reliability of the transmission system. The clutch bracket 3, through the first transmission disc assembly 11 and the second transmission disc assembly 21 mounted on it, becomes a shared part of the first clutch C1 and the second clutch C2, reducing the number of parts in the dual-clutch structure and facilitating the layout and compact design of automotive transmission systems with this dual-clutch structure.

[0031] See Figures 1 to 3 As shown, the clutch bracket 3 has a first mounting portion 31 and a second mounting portion 32 spaced apart along its axial direction. The first mounting portion 31 has a first mounting structure 311, and the second mounting portion 32 has a second mounting structure 321. The first mounting structure 311 and the second mounting structure 321 are respectively provided with first transmission gear structures on the outer periphery of the first mounting portion 31 and the second mounting portion 32. The first transmission disk assembly 11 is disposed on the first mounting structure 311, and the second transmission disk assembly 21 is disposed on the second mounting structure 321. The inner sides of the first transmission disk assembly 11 and the second transmission disk assembly 21 are respectively provided with second transmission gear structures that match the first transmission gear structures. The first transmission structure and the second transmission gear structure cooperate to form a gear transmission structure, so that the first transmission disk assembly 11 and the second transmission disk assembly 21 are rotatably connected to the clutch bracket 3 through the gear transmission structure.

[0032] The outer diameter of the first mounting structure 311 is smaller than that of the second mounting structure 321. Correspondingly, the outer diameter of the third transmission disc assembly 12 of the first clutch C1 is smaller than that of the fourth transmission disc assembly 22 of the second clutch C2. The third transmission disc assembly 12 and the fourth transmission disc assembly 22 are arranged axially spaced along the clutch bracket 3, allowing the engine input shaft 5 connected to the engine and the motor shaft 41 connected to the motor to be axially fitted together. Furthermore, since a stator is also provided on the outside of the motor shaft 41, the motor shaft 41 is positioned outside the engine input shaft 5, resulting in a more compact layout.

[0033] The motor rotation assembly 4 includes a motor shaft 41, a motor output shaft 42, and a rotating bracket 43 connecting the motor shaft 41 and the motor output shaft 42. When the motor rotation assembly 4 rotates, the motor shaft 41, the motor output shaft 42, and the rotating bracket 43 rotate synchronously. The motor rotation assembly 4 is rotatably mounted within the housing of the conventional system via multiple bearings, with the stator located outside the motor shaft 41. The motor rotation assembly 4 can rotate in both forward and reverse directions. By rotating the motor rotation assembly 4 in either direction, power is output to the motor M or power is input to the motor M to charge the battery.

[0034] The first clutch C1 is equipped with a first pressure plate assembly 13, and the second clutch C2 is equipped with a second pressure plate assembly 23. The first pressure plate assembly 13 and the second pressure plate assembly 23 are respectively located at opposite ends of the clutch support 3 in the axial direction, and the first transmission plate assembly 11 and the second transmission plate assembly 21 are located between the first pressure plate assembly 13 and the second pressure plate assembly 23. The first transmission plate assembly 11 and the second transmission plate assembly 21 are located between the first pressure plate assembly 13 and the second pressure plate assembly 23, which facilitates the first pressure plate assembly 13 to apply a thrust to the first transmission plate assembly 11 to drive it to engage with the third transmission plate assembly 12, thereby locking the first clutch C1 and entering the transmission state; at the same time, it also facilitates the second pressure plate assembly 23 to apply a thrust to the second transmission plate assembly 21 to drive it to engage with the fourth transmission plate assembly 22, thereby locking the second clutch C2 and entering the transmission state. In addition, the first pressure plate assembly 13 and the second pressure plate assembly 23 are respectively located at opposite ends of the clutch support 3 in the axial direction, so that their movements do not interfere with each other, thereby realizing that the first clutch C1 and the second clutch C2 can be engaged and disengaged independently.

[0035] The first transmission disc assembly 11 is provided with a first limiting disc 111, which is located at one end near the second mounting structure 321. The first mounting structure 311 and the second mounting structure 321 form a first limiting surface 33 by radial misalignment between them. The first limiting disc 111 abuts against the first limiting surface 33 to form an axial unidirectional limiting of the first transmission disc assembly 11 and the third transmission disc assembly 12. The first transmission disc assembly 11 and the third transmission disc assembly 12 are engaged by means of the axial unidirectional limiting. When the first pressure plate assembly 13 applies a thrust to the first transmission disc assembly 11, the multiple transmission discs on the first transmission disc assembly 11 are pushed and contact the multiple transmission discs on the third transmission disc assembly 12. The transmission discs of the first transmission disc assembly 11 and the third transmission disc assembly 13 move in the direction of the thrust until the first limiting disc 111 abuts against the first limiting surface 33. Thus, the first transmission disc assembly 11 and the third transmission disc assembly 13 form a friction transmission, that is, the first clutch C1 locks and engages to enter the transmission state.

[0036] By means of the radial misalignment between the first mounting part 31 and the second mounting part 32, a first limiting surface 33 is formed. On the one hand, it can realize the axial one-way limiting between the first transmission plate assembly 11 and the third transmission plate assembly 12 of the first clutch C1, and cooperate with the first pressure plate assembly 13 to realize the clutch transmission of the first clutch C1. On the other hand, it can simplify the structure of the engine input shaft 5, and also facilitate the installation operation between the first clutch C1 and the engine input shaft 5, making the overall structural layout more reasonable.

[0037] The fourth transmission disk assembly 22 is provided with a second limiting disk 221, which is located at the end of the fourth transmission disk assembly 22. The fourth transmission disk assembly 22 is mounted on the motor shaft 41 of the motor rotating assembly 4 and connected to the motor M. The motor shaft 41 of the motor rotating assembly 4 is provided with a second limiting surface 411. The second limiting disk 221 forms an axial one-way limiting of the fourth transmission disk assembly 22 by abutting against the second limiting surface 411. The second transmission disk assembly 21 and the fourth transmission disk assembly 22 are engaged by means of the axial one-way limiting. When the second pressure plate assembly 23 applies a thrust to the fourth transmission plate assembly 22, the multiple transmission plates on the fourth transmission plate assembly 22 are pushed and come into contact with the multiple transmission plates on the second transmission plate assembly 22. The transmission plates of the fourth transmission plate assembly 22 and the second transmission plate assembly 21 move in the direction of the thrust until the second limiting plate 221 abuts against the second limiting surface 411. Thus, the second transmission plate assembly 21 and the fourth transmission plate assembly 22 form a friction transmission, that is, the second clutch C2 locks in and enters the transmission state.

[0038] The second limiting surface 411 is formed by radial misalignment between the inner side of the motor shaft 41 body and the transmission gear structure on the inner side of the motor shaft 41, resulting in greater strength and higher reliability of the limiting action. In other embodiments, the second limiting surface can also be disposed at one end of the second transmission structure 321 of the clutch bracket 3. However, if the second limiting surface is disposed on the motor shaft 41, an annular flange would protrude radially from the clutch bracket 3, making the structure of the clutch 3 more complex. Therefore, in this example, it is preferable to dispose of the second limiting surface 411 on the motor shaft 41.

[0039] See Figure 2 and Figure 3 As shown, the clutch bracket 3 has a first pressure plate mounting portion 34 extending in the direction of the first pressure plate assembly 13. The first pressure plate assembly 13 includes a first pressure plate 131, a first return spring 132, and a first pressure plate drive member 133. The first pressure plate 131 is slidably fitted onto the first pressure plate mounting portion 34. The first return spring 132 is disposed between the first pressure plate 131 and the clutch bracket 3. The first pressure plate drive member 133 is disposed on the side of the first pressure plate 131 opposite to the first return spring 132. The first pressure plate 131 and the first pressure plate drive member 133 are sealed together to form a first hydraulic drive chamber 134. The first pressure plate 131 and the first pressure plate mounting portion 34 are sealed together to form a first hydraulic reset chamber 135. When the hydraulic pressure in the first hydraulic drive chamber 134 is greater than the hydraulic pressure in the first hydraulic reset chamber 135, the first pressure plate 131 moves relative to the clutch support 3 towards the location of the first transmission disc assembly 11 under the action of the hydraulic pressure, thereby engaging the first transmission disc assembly 11 and the third transmission disc assembly 12 under the limiting action of the first limiting surface 33. When the hydraulic pressure in the first hydraulic reset chamber 135 is greater than the hydraulic pressure in the first hydraulic drive chamber 134, the first pressure plate 131 moves relative to the clutch support 3 away from the location of the first transmission disc assembly 11 under the combined action of the hydraulic pressure and the elastic force of the first reset spring 132, thereby disengaging the first transmission disc assembly 11 and the third transmission disc assembly 12, i.e., disengaging the transmission of the first clutch C1. The first reset spring 132, located in the first hydraulic reset chamber 135, can, on the one hand, cooperate with the hydraulic system to drive the first pressure plate 131 to reset quickly, and on the other hand, maintain the stability of the first pressure plate 131 and reduce the vibration of the first pressure plate 131.

[0040] The second mounting portion 32 is an annular structure. The second transmission disc assembly 21 is disposed radially outside the second mounting portion 32, and a cavity is formed radially inside the second mounting portion 32. The second pressure plate assembly 23 is disposed on the rotating bracket 43, and the rotating bracket 43 is provided with a second pressure plate mounting portion 431 for mounting the second pressure plate assembly 23. A portion of the second pressure plate mounting portion 431 extends into the cavity. The partial extension of the second pressure plate mounting portion 431 into the cavity allows the cavity inside the second mounting portion 32 to be used to arrange the second pressure plate assembly 23, making the second pressure plate assembly 23 closer to the clutch bracket 3 and reducing the axial length of the clutch structure in the clutch bracket 3, which is beneficial for the miniaturization design of the transmission system.

[0041] The second pressure plate assembly 23 includes a second pressure plate 231, a second return spring 232, and a second pressure plate reset member 233. The rotating bracket 43 has a second pressure plate drive part 432 located on one side of the second pressure plate 231. The second pressure plate 231 and the second pressure plate drive part 432 are sealed together to form a hydraulic drive chamber, which is a second hydraulic drive chamber 234. The second hydraulic drive chamber 234 is used to drive the second pressure plate 231 to move in the direction that engages the second transmission plate assembly 21 and the fourth transmission plate assembly 22 through hydraulic pressure. The second pressure plate 231 and the second pressure plate reset member 233 are sealed together to form a second hydraulic reset chamber 235, and the second return spring 232 is disposed within the second hydraulic reset chamber 235. When the hydraulic pressure in the second hydraulic drive chamber 234 is greater than the hydraulic pressure in the second hydraulic reset chamber 235, the second pressure plate 231 moves relative to the clutch support 3 towards the location of the fourth transmission disc assembly 22 under the action of the hydraulic pressure, thereby engaging the second transmission disc assembly 21 and the fourth transmission disc assembly 22 under the limiting action of the second limiting surface 411; when the hydraulic pressure in the second hydraulic reset chamber 235 is greater than the hydraulic pressure in the second hydraulic drive chamber 234, the second pressure plate 231 moves relative to the clutch support 3 away from the location of the fourth transmission disc assembly 22 under the combined action of the hydraulic pressure and the elastic force of the second reset spring 232, thereby disengaging the second transmission disc assembly 21 and the fourth transmission disc assembly 22, that is, disengaging the transmission of the second clutch C2. The second reset spring 232, which is provided in the second hydraulic reset chamber 235, can, on the one hand, cooperate with the hydraulic system to drive the second pressure plate 231 to reset quickly, and on the other hand, maintain the stability of the second pressure plate 231 and reduce the vibration of the second pressure plate 231.

[0042] This utility model also discloses a hybrid electric vehicle, including the aforementioned dual-clutch structure. The dual-clutch structure is formed as part of the vehicle's transmission system. (See attached document.) Figure 2As shown, the clutch bracket 3 is mounted on a bracket shaft 30, and the bracket shaft 30 is connected to the power output shaft 6 of the transmission system through a planetary gear mechanism (only the sun gear 7 of the planetary gear mechanism is shown in the figure, and the sun gear 7 is integrally connected with the bracket shaft 30). Thus, when at least one of the first clutch C1 and the second clutch C2 is locked in the transmission, the power output shaft 6 can rotate synchronously with the clutch bracket 3 at a certain transmission ratio.

[0043] In this example, the bracket shaft 30 is connected to the power output shaft 6 via a planetary gear mechanism. In other embodiments, the bracket shaft 30 may also be directly connected to the power output shaft 6, and this is not a limitation.

[0044] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that the remaining undescribed parts are prior art, and that all changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A dual-clutch structure, comprising a first clutch and a second clutch, the first clutch comprising a first transmission disc assembly and a third transmission disc assembly for clutch transmission, the second clutch comprising a second transmission disc assembly and a fourth transmission disc assembly for clutch transmission, the third transmission disc assembly of the first clutch being connected to an engine, and the fourth transmission disc assembly of the second clutch being connected to an electric motor, characterized in that: It also includes a clutch bracket, on which the first transmission disc assembly and the second transmission disc assembly are respectively disposed, and the first transmission disc assembly and the second transmission disc assembly are respectively rotatably connected to the clutch bracket, thereby forming a synchronous rotational connection between the first transmission disc assembly and the second transmission disc assembly.

2. The dual-clutch structure according to claim 1, characterized in that: The clutch bracket has a first mounting structure and a second mounting structure spaced apart along its axial direction. The first transmission disk assembly is mounted on the first mounting structure, and the second transmission disk assembly is mounted on the second mounting structure. The outer diameter of the first mounting structure is smaller than the outer diameter of the second mounting structure.

3. The dual-clutch structure according to claim 2, characterized in that: The first transmission disk assembly is provided with a first limiting disk, which is located at one end near the second mounting structure. The first mounting structure and the second mounting structure form a first limiting surface by radial misalignment between them. The first limiting disk abuts against the first limiting surface to form an axial unidirectional limiting of the first transmission disk assembly and the third transmission disk assembly. The first transmission disk assembly and the third transmission disk assembly are engaged by means of the axial unidirectional limiting.

4. The dual-clutch structure according to claim 2, characterized in that: The fourth transmission disk assembly is provided with a second limiting disk, which is located at the end of the fourth transmission disk assembly. The fourth transmission disk assembly is disposed on the motor rotating assembly and connected to the motor. The motor rotating assembly is used to output power to the motor or input power to the motor. The motor rotating assembly is provided with a second limiting surface. The second limiting disk abuts against the second limiting surface to form an axial one-way limiting of the fourth transmission disk assembly. The second transmission disk assembly and the fourth transmission disk assembly are engaged by means of the axial one-way limiting.

5. A dual-clutch structure according to claim 2, characterized in that: The first mounting structure and the first transmission disk assembly are connected by a gear transmission structure, thereby the first transmission disk assembly is rotatably connected to the clutch bracket; The second mounting structure and the second transmission disk assembly are connected by a gear transmission structure, thereby the second transmission disk assembly is rotatably connected to the clutch bracket.

6. The dual-clutch structure according to claim 1, characterized in that: The first transmission disc assembly and the second transmission disc assembly are arranged at an axial distance along the clutch bracket. The first clutch is provided with a first pressure plate assembly, and the second clutch is provided with a second pressure plate assembly. The first pressure plate assembly and the second pressure plate assembly are respectively disposed at both ends of the clutch bracket in the axial direction, and the first transmission disc assembly and the second transmission disc assembly are located between the first pressure plate assembly and the second pressure plate assembly.

7. A dual-clutch structure according to claim 6, characterized in that: The clutch bracket is provided with a first pressure plate mounting portion extending in the direction of the first pressure plate assembly, and the first pressure plate assembly includes a first pressure plate that is slidably fitted onto the first pressure plate mounting portion.

8. A dual-clutch structure according to claim 6, characterized in that: The clutch bracket has an annular second mounting portion, the second transmission plate assembly is disposed on the radially outer side of the second mounting portion, the radially inner side of the second mounting portion forms a cavity, the second pressure plate assembly is disposed on a rotating bracket, the rotating bracket has a second pressure plate mounting portion for mounting the second pressure plate assembly, a portion of the second pressure plate mounting portion extends into the cavity.

9. A dual-clutch structure according to claim 8, characterized in that: The rotating bracket is connected to the power output shaft of the motor and forms part of the motor rotating assembly.

10. A dual-clutch structure according to claim 8 or 9, characterized in that: The second pressure plate assembly includes a second pressure plate. The rotating bracket is provided with a second pressure plate driving part located on one side of the second pressure plate. The second pressure plate and the second pressure plate driving part together form a hydraulic driving cavity. The hydraulic driving cavity is used to drive the second pressure plate to move in the direction that engages the second transmission plate assembly and the fourth transmission plate assembly through hydraulic pressure therein.

11. A hybrid electric vehicle, characterized in that: Includes a dual-clutch structure as described in any one of claims 1-10.

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