A clutch driven plate

Abstract

The utility model discloses a kind of clutches driven disc, it is related to clutch driven disc technical field, including inner disc hub, outer disc hub, shock disc, pre-damping disc assembly and pre-damping spring;Shock disc includes first shock disc and second shock disc;The outside of inner disc hub is sleeved with outer disc hub, the side of outer disc hub is connected with first shock disc, the other side of outer disc hub is connected with second shock disc, rivet connection between outer disc hub and first shock disc and second shock disc;Pre-damping disc assembly includes first pre-damping disc and second pre-damping disc;The outside of second shock disc is connected with first pre-damping disc, first pre-damping disc outside is connected with second pre-damping disc, and pre-damping driven disc is connected between first pre-damping disc and second pre-damping disc;Second pre-damping disc is connected with first pre-damping disc outside and is connected with second pre-damping disc along circumferential direction Multiple first openings for installing pre-damping spring are set;The outward side of first opening is connected with the baffle that is set to the outside protruding;Baffle has the observation hole that is through inner concave surface and outer convex surface.

Description

Technical Field

[0001] This utility model belongs to the field of clutch driven plate technology, specifically relating to a clutch driven plate. Background Technology

[0002] The clutch driven plate is another component of the clutch. It transmits engine torque to the transmission through friction, reducing vibration and impact in the transmission system and completing the "engagement" and "disengagement" tasks. The clutch driven plate includes a pre-damping spring and a cover plate for mounting the pre-damping spring. However, the existing spring window structure on the cover plate for mounting the pre-damping spring is designed as either an open structure or a fully enclosed structure.

[0003] One common problem with open-type structures is that when a pre-damping spring breaks, the damaged spring will come loose, causing damage to the system or even rendering it unusable. Another common problem with fully enclosed structures is that the condition of the pre-damping spring cannot be observed, making it uncertain whether replacement is needed. To check the condition of the pre-damping spring, the cover plate on which it is installed must be removed and then reassembled. If the pre-damping spring is in good condition, this disassembly and reassembly process is not only time-consuming but can also cause some damage to the structure, reducing its service life.

[0004] Furthermore, the existing installation structure of the pre-damping spring lacks a positioning structure, causing the pre-damping spring to rely entirely on the cover plate it is installed on for limiting its position, which leads to increased wear between the cover plate and the pre-damping spring.

[0005] In addition, the small contact area but large surface pressure at the connection between the shock absorber disc and the inner disc hub leads to rapid wear, which can easily cause abnormal noises and, in severe cases, affect braking performance and cause vehicle malfunctions. Utility Model Content

[0006] This utility model provides a clutch driven plate to solve the problems of existing structures for installing pre-damping springs. The open structure is prone to causing the pre-damping spring to break and disengage from the driven plate. Moreover, the fully enclosed structure cannot observe the usage status of the pre-damping spring and there is no limiting structure for the pre-damping spring.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A clutch driven plate includes an inner disc hub, an outer disc hub, a damping disc, a pre-damping disc assembly, and a pre-damping spring; the damping disc includes a first damping disc and a second damping disc; the outer disc hub is sleeved on the outer side of the inner disc hub, the first damping disc is connected to one side of the outer disc hub, the second damping disc is connected to the other side of the outer disc hub, and the outer disc hub is riveted to the first damping disc and the second damping disc.

[0009] The pre-damping disc assembly includes a first pre-damping disc and a second pre-damping disc; the first pre-damping disc is connected to the outside of the second pre-damping disc, the second pre-damping disc is connected to the outside of the first pre-damping disc, and a pre-damping driven disc is connected between the first pre-damping disc and the second pre-damping disc;

[0010] The second pre-damping disc has multiple first openings along its circumference for installing pre-damping springs; a baffle plate protruding outward is connected to the outward side of the first opening; the baffle plate has an observation hole that extends through the width direction.

[0011] The second pre-damping disc of this application has a first opening for installing a pre-damping spring. One end of the pre-damping spring along its axial direction is connected to one side wall of the first opening, and the other end of the pre-damping spring along its axial direction is connected to the other side wall of the first opening. A baffle protruding outward is connected to the outward side of the first opening to limit the radial direction of the spring. Furthermore, since the baffle can circumferentially block the pre-damping spring, it can prevent the pre-damping spring from breaking and detaching from the first opening. The shape of the baffle is adapted to the shape of the pre-damping spring so that the spring can be installed inside the baffle. Moreover, the baffle has an observation hole extending through the baffle along its width, allowing direct observation of the compression or usage status of the pre-damping spring. This allows for assessment of the risk of breakage of the pre-damping spring without disassembling structural components, facilitating timely replacement of the pre-damping spring.

[0012] The side of the baffle facing the first opening has an inwardly recessed concave surface, and the side of the baffle away from the first opening has an outwardly convex surface. The concave surface and the outwardly convex surface form an arc surface structure.

[0013] To accommodate the installation of the pre-damping spring and ensure its proper positioning, the baffle plate is designed with a partially cylindrical structure. The inner side of the baffle plate facing the first opening has a concave surface with an arcuate working surface. The outer side of the baffle plate away from the first opening has an outwardly convex surface, also with an arcuate structure. The pre-damping spring is cylindrical. This design allows the pre-damping spring to fit snugly inside the baffle plate. Part of the pre-damping spring's circumference is confined within the first opening by the concave surface of the baffle plate, preventing it from breaking and detaching from the baffle plate. This further reduces clutch damage efficiency and increases the service life of the clutch driven plate.

[0014] The observation hole has an oblong shape, running through the concave inner surface and the convex outer surface, allowing the user to observe the operating status of the internal pre-damping spring.

[0015] Workers can observe the compression state and whether there is any breakage of the pre-damping spring through the observation hole. The observation hole allows for a direct view of the pre-damping spring's condition within the first opening, eliminating the need to remove the clutch's first pre-damping disc, second pre-damping disc, and pre-damping driven disc. This further saves time, reduces labor, avoids damage to the clutch caused by repeated disassembly and reassembly, and indirectly improves the service life of the clutch driven disc.

[0016] A first opening groove is reserved between one side of the baffle along its length and the sidewall of the first opening, and a second opening groove is reserved between the other side of the baffle along its length and the sidewall of the first opening.

[0017] The baffle does not completely close one side of the first opening, but only partially closes it. The purpose is to leave a certain space between the two ends of the baffle and the first opening, thereby forming a first opening groove and a second opening groove on both sides of the baffle. The setting of the first opening groove and the second opening groove makes it easy to observe the compression and usage status of the pre-damping spring, and further observe the compression and wear between the end of the pre-damping spring and the wall of the pre-damping driven plate. This makes it easier to accurately judge the usage status of the pre-damping spring and determine whether it needs to be replaced.

[0018] The first opening slot and the second opening slot are arranged symmetrically.

[0019] The pre-damping driven plate has a second opening corresponding to the first opening.

[0020] The second opening of the pre-damping disc has lugs on both sides along its length that protrude toward the inside of the second opening, which can limit the radial direction of the pre-damping spring.

[0021] The second opening of the pre-damping disc has lugs protruding towards the inside of the second opening on both sides along its length. Specifically, the first lug is connected to one side of the second opening of the pre-damping disc along its length, and the second lug is connected to the other side of the second opening of the pre-damping disc along its length. The first lug and the second lug are used to fit onto both sides of the pre-damping spring along its axial direction, which can limit the radial direction of the pre-damping spring, thereby achieving the positioning of the pre-damping spring and preventing the pre-damping spring from detaching from the first opening, the second opening, and the third opening.

[0022] The first pre-damping disc has a third opening corresponding to the first opening position. The first opening, the second opening, and the third opening are connected to form a mounting groove for installing the pre-damping spring.

[0023] On the circumference of the first pre-damping disc, a third lug is provided on one side of the third opening, which protrudes toward the second pre-damping disc, and a fourth lug is provided on the other side of the third opening, which protrudes toward the second pre-damping disc.

[0024] A damping pad is connected between the first shock absorber disc and the inner disc hub.

[0025] The small contact area but high surface pressure at the connection between the shock absorber disc and the inner disc hub leads to rapid wear and abnormal noise. In severe cases, it can affect braking performance and cause vehicle malfunctions. Therefore, this application provides a damping pad between the first shock absorber disc and the inner disc hub to further reduce wear between them.

[0026] A driven disc and a reinforcing plate are also fitted on the outer side of the outer hub. The driven disc is located between the reinforcing plate and the first damping disc. The reinforcing plate is connected to the first damping disc, the second damping disc, and the driven disc by rivets. A damping washer is connected between the driven disc and the first damping disc along the axial direction. A main damping spring is connected between the reinforcing plate on the other side along the axial direction and the second damping disc. A damping washer is connected between the main damping spring and the reinforcing plate.

[0027] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0028] 1. A clutch driven plate according to this application includes an inner hub, an outer hub, a damping plate, a pre-damping plate assembly, and a pre-damping spring; the damping plate includes a first damping plate and a second damping plate; wherein, the pre-damping plate assembly includes a first pre-damping plate and a second pre-damping plate; the outer side of the second damping plate is connected to the first pre-damping plate, the outer side of the first pre-damping plate is connected to the second pre-damping plate, and a pre-damping driven plate is connected between the first pre-damping plate and the second pre-damping plate; the second pre-damping plate has a plurality of first openings along the circumferential direction for installing the pre-damping spring; a baffle plate protruding outward is connected to the outward side of the first opening; the baffle plate has an observation hole extending through the width direction;

[0029] The second pre-damping disc has a first opening for installing a pre-damping spring. One end of the pre-damping spring along its axis abuts against one side wall of the first opening, and the other end along its axis abuts against the other side wall of the first opening. A baffle protruding outward is connected to the outward side of the first opening to limit the spring's radial direction. The shape of the baffle matches the shape of the pre-damping spring, allowing the spring to be installed inside the baffle. Furthermore, the baffle has an observation hole extending through it along its width, allowing direct observation of the pre-damping spring's compression or usage status. This enables the determination of whether the pre-damping spring is at risk of breakage without disassembling structural components, facilitating timely replacement of the pre-damping spring. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a clutch driven plate according to one embodiment of this application;

[0032] Figure 2 This is a cross-sectional schematic diagram of a clutch driven plate according to one embodiment of this application;

[0033] Figure 3 This is a partial schematic diagram of the cross-section of a clutch driven plate along one radial side according to one embodiment of this application;

[0034] Figure 4 This is a partial schematic diagram of the cross-section of a clutch driven plate along the radial direction on one side according to one embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the second pre-damping disc of a clutch driven disc according to one embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of a pre-damping driven plate of a clutch driven plate according to one embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the structure of the first pre-damping disc of a clutch driven disc according to one embodiment of this application;

[0038] In the picture,

[0039] 1. Inner hub; 2. Outer hub; 3. First damping disc; 4. Second damping disc; 5. First pre-damping disc; 6. Second pre-damping disc; 7. Pre-damping driven disc; 8. First opening; 9. Baffle; 10. Observation hole; 11. First opening slot; 12. Second opening slot; 13. Second opening; 14. First lug; 15. Second lug; 16. Third opening; 17. Damping pad; 18. Driven disc; 19. Reinforcing plate; 20. Damping washer; 21. Main damping spring; 22. Main damping outer spring; 23. Main damping inner spring; 24. Single-layer open wave spring; 25. Pre-damping disc spring; 26. Pre-damping damping pad; 27. Wave plate; 28. First friction plate; 29. ​​Second friction plate; 30. Pre-damping spring; 31. Third lug; 32. Fourth lug. Detailed Implementation

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0045] Because existing pre-damping spring mounting covers are designed with either open or fully enclosed spring windows, open designs are prone to problems. Open designs are susceptible to damage when a pre-damping spring breaks, causing it to detach and potentially rendering the system unusable. Fully enclosed designs, on the other hand, make it impossible to monitor the pre-damping spring's condition and determine if replacement is necessary. Checking the spring's condition requires removing the mounting cover and reassembling it, which is time-consuming and can damage the structure if the spring is in good condition. This reduces the service life of the pre-damping spring. Furthermore, the existing installation structure of the pre-damping spring lacks a positioning structure, causing the spring's limitation to rely entirely on the cover plate it is installed on, leading to increased wear between the cover plate and the spring. In addition, the contact area between the shock absorber disc and the inner hub is small but the surface pressure is large, resulting in rapid wear, abnormal noise, and in severe cases, affecting braking performance and causing vehicle malfunctions. Therefore, based on the above technical problems, this application will design the installation structure of the pre-damping spring and the structure between the inner hub and the shock absorber disc to solve the problems of spring breakage and detachment, difficulty in observing the usage status and limitation, and further solve the problem of abnormal noise between the shock absorber disc and the inner hub.

[0046] This utility model relates to a clutch driven plate 18, such as Figure 1-7 As shown, it includes an inner hub 1, an outer hub 2, a reinforcing plate 19, a driven plate 18, a damping plate, a pre-damping spring 30, a main damping spring 21, a pre-damping disc spring 25, and a single-layer open wave spring 24.

[0047] An outer hub 2 is fitted onto the outer side of the inner hub 1. A first damping disc 3 is connected to one side of the outer hub 2 along its axial direction, and a second damping disc 4 is connected to the other side. The first damping disc 3, the outer hub 2, and the second damping disc 4 are connected by rivets. The first damping disc 3 and the second damping disc 4 are fitted onto the outer side of the inner hub 1, and a damping pad 17 is connected between the inner hub 1 and the first damping disc 3. By providing the damping pad 17, the wear between the inner hub 1 and the first damping disc 3 can be further reduced.

[0048] A driven disc 18 and a reinforcing plate 19 are also fitted and connected to the outer side of the outer hub 2. The driven disc 18 is located between the reinforcing plate 19 and the first damping disc 3. The reinforcing plate 19 is connected to the first damping disc 3, the second damping disc 4, and the driven disc 18 by rivets. A damping washer 20 is connected between the driven disc 18 and the first damping disc 3 along the axial direction. A main damping spring 21 is connected between the reinforcing plate 19 on the other side along the axial direction and the second damping disc 4. A damping washer 20 is connected between the main damping spring 21 and the reinforcing plate 19.

[0049] A through slot is provided between the first damping disc 3, the driven disc 18, the reinforcing plate 19, and the second damping disc 4. Multiple slots are provided along the circumference. The slots are used to connect the main damping outer spring 22. The main damping inner spring 23 is sleeved and connected to the inner side of the main damping outer spring 22.

[0050] The outer side of the second damping disc 4 is connected to a pre-damping disc assembly, which includes a first pre-damping disc 5 and a second pre-damping disc 6. The first pre-damping disc 5 is disposed on the outer side of the second damping disc 4. A single-layer open wave spring 24 is connected between the second damping disc 4 and the first pre-damping disc 5. The second pre-damping disc 6 is disposed on the outer side of the first pre-damping disc 5. The first pre-damping disc 5 and the second pre-damping disc 6 are connected by pre-damping rivets. The first pre-damping disc 5 and the second pre-damping disc 6 are sleeved and connected to the outer side of the inner disc hub 1. A pre-damping driven disc 7 is connected between the first pre-damping disc 5 and the second pre-damping disc 6. The pre-damping driven disc 7 is sleeved on the outer side of the inner disc hub 1. A pre-damping damping pad 26 is connected between the pre-damping driven disc 7 and the first pre-damping disc 5. A pre-damping disc spring 25 is connected between the pre-damping driven disc 7 and the second pre-damping disc 6.

[0051] A through mounting groove is provided between the first pre-damping disc 5, the pre-damping driven disc 7 and the second pre-damping disc 6. Multiple mounting grooves are provided along the circumference, and the mounting grooves are used to connect the pre-damping spring 30.

[0052] A wave-shaped sheet 27, evenly distributed circumferentially, is connected to one side of the driven disc 18 facing the second damping disc 4.

[0053] Friction plates are evenly connected in the circumferential direction on the side of the driven disc 18 facing the first damping disc 3, and wave plates 27 are evenly connected in the circumferential direction on the side of the driven disc 18 facing the second damping disc 4. Friction plates are connected to the outer side of the wave plates 27.

[0054] In a preferred embodiment, the second pre-damping disc 6 has a plurality of first openings 8 along the circumferential direction, and the first openings 8 are evenly arranged along the circumferential direction of the second pre-damping disc 6; a baffle 9 protruding outward is connected to the outward side of the first opening 8.

[0055] The first opening 8 of the second pre-damping disc 6 is used to install the pre-damping spring 30. One end of the pre-damping spring 30 in the axial direction is connected to one side wall of the first opening 8, and the other end of the pre-damping spring 30 in the axial direction is connected to the other side wall of the first opening 8. In order to achieve circumferential limitation of the pre-damping spring 30, a baffle 9 protruding outward is connected to the outward side of the first opening 8. The shape of the baffle 9 is adapted to the shape of the pre-damping spring 30 so that the spring can be installed in the baffle 9 to achieve radial limitation of the spring.

[0056] In a preferred embodiment, the side of the baffle 9 facing the first opening 8 has an inwardly recessed concave surface, and the side of the baffle 9 away from the first opening 8 has an outwardly convex surface, with the concave surface and the outwardly convex surface forming an arc surface structure.

[0057] To accommodate the installation of the pre-damping spring 30 and ensure its proper positioning, the baffle 9 is designed with a partially cylindrical structure. The baffle 9 has a concave surface facing the first opening 8, with an arc-shaped working surface. The baffle 9 also has an outwardly convex surface facing away from the first opening 8, also with an arc-shaped structure. The pre-damping spring 30 has a cylindrical structure. This design allows the pre-damping spring 30 to fit snugly inside the baffle 9. A portion of the pre-damping spring 30's circumference is confined within the first opening 8 by the concave surface of the baffle 9, preventing it from breaking and detaching from the baffle 9. This further reduces clutch damage efficiency and increases the service life of the clutch driven plate 18.

[0058] In a preferred embodiment, the baffle 9 has an observation hole 10 that extends through the concave surface and the convex surface.

[0059] Furthermore, the observation hole 10 has an oblong shape, which allows the user to observe the operating status of the internal pre-damping spring 30.

[0060] The observation hole 10 extends through the baffle 9 along its width. Through the observation hole 10, the operator can observe the compression state of the pre-damping spring 30 and whether there is any breakage. The observation hole 10 allows for a direct view of the usage status of the pre-damping spring 30 inside the first opening 8. This eliminates the need to remove the first pre-damping disc 5, the second pre-damping disc 6, and the pre-damping driven disc 7 of the clutch, thereby saving time, reducing labor, avoiding damage to the clutch caused by repeated disassembly and assembly, and indirectly improving the service life of the clutch driven disc 18.

[0061] In a preferred embodiment, a first opening groove 11 is reserved between one side of the baffle 9 along the length direction and the side wall of the first opening 8, and a second opening groove 12 is reserved between the other side of the baffle 9 along the length direction and the side wall of the first opening 8.

[0062] The baffle 9 does not completely close one side of the first opening 8, but only partially closes it. The purpose is to leave a certain space between the two ends of the baffle 9 and the first opening 8, so that the first opening groove 11 and the second opening groove 12 are formed on both sides of the baffle 9 respectively. The setting of the first opening groove 11 and the second opening groove 12 makes it easy to observe the compression state and usage state of the pre-damping spring 30, and further observes the compression and wear between the end of the pre-damping spring 30 and the wall of the pre-damping driven plate 7, so as to accurately judge the usage state of the pre-damping spring 30 and determine whether it needs to be replaced.

[0063] Specifically, the first opening groove 11 and the second opening groove 12 are arranged symmetrically.

[0064] In a preferred embodiment, the pre-damping driven plate 7 has a second opening 13 corresponding to the first opening 8, which is used to install the pre-damping spring 30 in the first opening 8 and the second opening 13.

[0065] In a preferred embodiment, the second opening 13 of the pre-damping disc is connected to lugs on both sides along its length direction, which protrude toward the inside of the second opening 13 and can limit the radial direction of the pre-damping spring 30.

[0066] The second opening 13 of the pre-damping disc has lugs protruding towards the inside of the second opening 13 on both sides along its length. Specifically, a first lug 14 is connected to one side of the second opening 13 along its length, and a second lug 15 is connected to the other side of the second opening 13 along its length. The first lug 14 and the second lug 15 are used to fit onto both sides of the pre-damping spring 30 along its axial direction, which can limit the radial direction of the pre-damping spring 30, thereby positioning the pre-damping spring 30 and preventing the pre-damping spring 30 from detaching from the first opening 8, the second opening 13, and the third opening 16.

[0067] Furthermore, the first lug 14 and the second lug 15 are symmetrically arranged on both sides of the second opening 13.

[0068] In a preferred embodiment, the first pre-damping disc 5 has a third opening 16 at the position corresponding to the first opening 8. The first opening 8, the second opening 13 and the third opening 16 are connected to form a mounting groove for installing the pre-damping spring 30.

[0069] In a preferred embodiment, on the circumferential surface of the first pre-damping disc 5, a third lug 31 protruding toward the second pre-damping disc 6 is connected to one side of the third opening 16, and a fourth lug 32 protruding toward the second pre-damping disc 6 is connected to the first pre-damping disc 5 on the other side of the third opening 16.

[0070] The third lug 31 and the fourth lug 32 protrude and connect to the circumferential surface of the first pre-damping disc 5. The purpose of their protrusion on the circumferential surface is to limit the two sides of the pre-damping spring 30 in the axial direction, thereby positioning the pre-damping spring 30 in the axial direction. Thus, the first lug 14 and the second lug 15 together limit the pre-damping spring 30 in the radial direction, and the third lug 31 and the fourth lug 32 limit the pre-damping spring 30 in the axial direction, thereby enhancing the installation stability of the pre-damping spring 30 in the mounting groove and preventing the pre-damping spring 30 from detaching from the mounting groove.

[0071] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0072] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0073] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A clutch driven plate, characterized in that, It includes an inner hub, an outer hub, a damping disc, a pre-damping disc assembly, and a pre-damping spring; the damping disc includes a first damping disc and a second damping disc; the outer hub is sleeved on the outer side of the inner hub, the first damping disc is connected to one side of the outer hub, the second damping disc is connected to the other side of the outer hub, and the outer hub is riveted to the first damping disc and the second damping disc. The pre-damping disc assembly includes a first pre-damping disc and a second pre-damping disc; the first pre-damping disc is connected to the outside of the second pre-damping disc, the second pre-damping disc is connected to the outside of the first pre-damping disc, and a pre-damping driven disc is connected between the first pre-damping disc and the second pre-damping disc; The second pre-damping disc has multiple first openings along its circumference for installing pre-damping springs; a baffle plate protruding outward is connected to the outward side of the first opening; the baffle plate has an observation hole that extends through the width direction.

2. A clutch driven plate according to claim 1, characterized in that, The side of the baffle facing the first opening has an inwardly recessed concave surface, and the side of the baffle away from the first opening has an outwardly convex surface. The concave surface and the outwardly convex surface form an arc surface structure.

3. A clutch driven plate according to claim 1, characterized in that, The observation hole has a waist-shaped structure.

4. A clutch driven plate according to claim 1, characterized in that, A first opening groove is reserved between one side of the baffle along its length and the sidewall of the first opening, and a second opening groove is reserved between the other side of the baffle along its length and the sidewall of the first opening.

5. A clutch driven plate according to claim 4, characterized in that, The first opening slot and the second opening slot are arranged symmetrically.

6. A clutch driven plate according to claim 1, characterized in that, The pre-damping driven plate has a second opening corresponding to the first opening.

7. A clutch driven plate according to claim 6, characterized in that, The second opening of the pre-damping disc has lugs on both sides along its length that protrude toward the inside of the second opening, which can limit the radial direction of the pre-damping spring.

8. A clutch driven plate according to claim 6, characterized in that, The first pre-damping disc has a third opening corresponding to the first opening position. The first opening, the second opening, and the third opening are connected to form a mounting groove for installing the pre-damping spring.

9. A clutch driven plate according to claim 8, characterized in that, On the circumference of the first pre-damping disc, a third lug is provided on one side of the third opening, which protrudes toward the second pre-damping disc, and a fourth lug is provided on the other side of the third opening, which protrudes toward the second pre-damping disc.

10. A clutch driven plate according to claim 1, characterized in that, A damping pad is connected between the first shock absorber disc and the inner disc hub.

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