Clutch driven plate assembly structure

Abstract

The utility model relates to the technical field of automobile parts assembly, specifically relates to a clutch driven plate assembly structure. Clutch driven plate assembly structure includes pre -damping upper cover plate, pre -damping lower cover plate and pre -damping spring, and pre -damping lower cover plate is fixed on main damping assembly, and pre -damping lower cover plate is opened with the first pre -damping window of adaptation with pre -damping spring, and pre -damping upper cover plate is pressed tightly with pre -damping lower cover plate through the key hub. The utility model can effectively ensure that pre -damping spring does not come out due to centrifugal force or the space change after abrasion and so on in the whole movement cycle, and also avoids the abnormal sound and the jitter caused by the coming out of pre -damping spring.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts assembly technology, and in particular to a clutch driven plate assembly structure. Background Technology

[0002] In automotive clutch systems, pre-damping springs (also known as primary damping springs or idle damping springs) are a key component of the damping mechanism. Their core function is to absorb and buffer the small torque fluctuations of the engine output under engine idling or low speed and low load conditions, thereby reducing the vibration and noise of the transmission system and improving the driving smoothness and comfort of the vehicle.

[0003] However, the existing pre-damping spring mounting structure has significant defects. The pre-damping cover plate usually adopts an open or weakly constrained design, which is insufficient to fix the spring. As a result, the spring is very easy to fall off the mounting position when subjected to alternating loads, high temperature environment, material thermal expansion or manufacturing tolerance accumulation for a long time. Once it falls off, there will be many problems: (1) The pre-damping spring will move freely inside the clutch driven plate assembly structure and continuously hit the damper disc hub or housing as the clutch rotates, producing obvious metallic impact sound, especially when idling or driving at low speed. Meanwhile, the unfiltered torque fluctuations of the engine are directly transmitted to the transmission and the body, causing abnormal vibrations in the steering wheel, seat and chassis, which seriously reduces the ride comfort; (2) the detachment of the pre-damping spring will also cause the shifting process to be stiff, lacking buffering for minor impacts, resulting in significant jerking and jerking when shifting to low gears, and a sharp decrease in shifting smoothness; (3) when accelerating or when the load changes suddenly, the detached spring will violently impact the clutch components due to inertia, producing an impact sound, accompanied by the illusion of play in the transmission system; (4) the detached spring will also jam the main damping spring or other key components, causing the entire damping system to fail, and even damaging the steel plate structure of the clutch driven plate assembly. The spring may even break and produce fragments under high-speed rotation. These fragments will enter the transmission and damage gears, synchronizers or bearings, causing catastrophic failures and high maintenance costs. At the same time, these abnormal vibrations and impacts will also be transmitted to the engine flywheel or dual-mass flywheel, accelerating the wear of its internal springs and bearings and shortening its service life. These problems not only reduce the reliability and durability of vehicles, increase maintenance costs and failure rates, and affect the customer's user experience, but also cause significant problems for product marketing and customer acceptance. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a clutch driven plate assembly structure to solve the problems of abnormal noise, vibration, shifting jerking and component damage caused by the easy detachment of the pre-damping spring in the clutch driven plate assembly structure in the prior art.

[0005] This utility model discloses a clutch driven plate assembly structure, including a splined hub, and a main damping assembly and a pre-damping assembly mounted on the splined hub; The pre-damping assembly includes a pre-damping upper cover plate, a pre-damping lower cover plate, and a pre-damping spring. The pre-damping lower cover plate is fixed to the main damping assembly, and a first pre-damping window adapted to the pre-damping spring is provided on the pre-damping lower cover plate. The pre-damping upper cover plate is pressed together with the pre-damping lower cover plate through the splined hub, and a second pre-damping window adapted to the pre-damping spring is provided on the pre-damping upper cover plate. The pre-damping spring is located in both the first and second pre-damping windows, and a limiting plate located outside the pre-damping spring and limiting the pre-damping spring is fixed on the second pre-damping window.

[0006] Optionally, the length direction of the limiting plate is perpendicular to the length direction of the pre-damping spring, and the two ends of the limiting plate are fixed on the opposite sides of the second pre-damping window. The limiting plate has an outwardly convex arc-shaped structure along its length direction, and there is a clearance distance between the inner arc wall of the limiting plate and the pre-damping spring.

[0007] Optionally, multiple first pre-damping windows are distributed along the circumferential direction of the pre-damping lower cover plate, and the second pre-damping window corresponds one-to-one with the first pre-damping window.

[0008] Optionally, the main vibration damping assembly includes a main vibration damping base plate, a main vibration damping cover plate, and a main vibration damping spring. The main vibration damping cover plate has a first main vibration damping window adapted to the main vibration damping spring. The main vibration damping base plate is riveted and pressed together with the main vibration damping base plate by rivets. The main vibration damping base plate also has a second main vibration damping window adapted to the main vibration damping spring. The main vibration damping spring is located in both the first pre-vibration damping window and the second pre-vibration damping window. The pre-damping lower cover plate is riveted to the outer plate surface of the main damping cover plate, and the first main damping window is distributed outside the second pre-damping window ring.

[0009] Optionally, the pre-damping lower cover plate includes a first base plate riveted to and attached to the main damping cover plate by the rivets, and a first assembly portion formed by bending the outer edge of the first base plate toward the pre-damping upper cover plate, wherein the first pre-damping window is opened on the first assembly portion. The pre-damping upper cover plate includes a second base plate fixed on the spline hub, and a second assembly portion formed by bending the outer edge of the second base plate toward the pre-damping lower cover plate, wherein the second pre-damping window is opened on the second assembly portion; When the second substrate is pressed together with the second assembly part and the first assembly part, a riveting space is formed between the second substrate and the first substrate.

[0010] Optionally, multiple first main vibration damping windows are distributed along the circumferential direction of the main vibration damping cover plate, and the second main vibration damping window corresponds one-to-one with the first main vibration damping window. Limiting covers that clamp the sides of the main vibration damping spring are respectively fixed on the opposite two sides of the first main vibration damping window. The second assembly part is distributed in multiple ways along the circumferential direction of the second substrate, and the first assembly part corresponds to the second assembly part one by one. One second assembly part is distributed between each pair of adjacent first main vibration damping windows, and the outer edge of the second assembly part presses against the limiting cover on the inner ring side of the corresponding two first main vibration damping windows.

[0011] Optionally, the limiting cover on the outer ring side of the first main vibration damping window has an outwardly convex arc-shaped structure, the limiting cover on the inner ring side of the first main vibration damping window is a straight line, and the outer edge of the second assembly part at the pressing point is a straight line that fits the corresponding limiting cover.

[0012] Optionally, a plurality of second mounting portions on the outer edge of the second substrate are continuously formed along the circumferential direction, and the connecting edge between two adjacent second mounting portions has an inwardly concave arc-shaped structure.

[0013] Optionally, the main damping base plate and the main damping cover plate are each provided with a spline shaft hole adapted to the spline hub in the middle, and the first base plate and the second base plate are each provided with a central shaft hole that mates with the spline hub in the middle.

[0014] Optionally, an annular positioning groove is provided on the outer wall of the spline hub shaft, the inner diameter of the central shaft hole on the second substrate is smaller than the inner diameter of the central shaft hole on the first substrate, and the inner edge of the central shaft hole on the second substrate is embedded in the positioning groove.

[0015] Compared with the prior art, the beneficial effects of the clutch driven plate assembly structure provided in this embodiment of the present invention are as follows: The pre-damping upper and lower covers are clamped together via a splined hub, and a limiting plate is fixed in the second pre-damping window, ensuring the pre-damping spring is always firmly constrained within the first and second pre-damping windows. The limiting plate, located outside the pre-damping spring, effectively counteracts spatial changes caused by centrifugal force, alternating loads, high-temperature expansion, and wear, preventing the pre-damping spring from detaching from the window. Thus, the pre-damping spring stably absorbs minor torque fluctuations in the engine under idling or low-speed conditions, avoiding abnormal noises, vibrations, shift jerks, and component damage caused by detachment. This ensures the coordinated operation of the main damping assembly and the pre-damping assembly, improving the reliability of the clutch driven plate assembly structure and driving smoothness. Attached Figure Description

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 A schematic diagram of the overall structure of the clutch driven plate assembly provided in this embodiment of the utility model; Figure 2 A schematic diagram of the assembly of the pre-damping spring and the pre-damping top cover plate provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the assembly structure of the clutch driven disc assembly provided in an embodiment of the present utility model.

[0017] The markings in the attached diagram are as follows: 1. Pre-damping upper cover plate; 11. Second pre-damping window; 12. Second base plate; 13. Second assembly part; 2. Pre-damping lower cover plate; 21. First pre-damping window; 22. First base plate; 23. First assembly part; 3. Pre-damping spring; 4. Splined hub; 41. Positioning groove; 5. Limiting plate; 6. Main damping cover plate; 61. First main damping window; 62. Limiting cover; 7. Main damping spring; 8. Rivet. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] This utility model discloses a clutch driven plate assembly structure, such as Figures 1-3 As shown, it includes a splined hub 4, and a main damping assembly and a pre-damping assembly mounted on the splined hub 4; The pre-damping assembly includes a pre-damping upper cover plate 1, a pre-damping lower cover plate 2, and a pre-damping spring 3. The pre-damping lower cover plate 2 is fixed on the main damping assembly, and a first pre-damping window 21 adapted to the pre-damping spring 3 is provided on the pre-damping lower cover plate 2. The pre-damping upper cover plate 1 is pressed and fitted with the pre-damping lower cover plate 2 through a splined hub 4, and a second pre-damping window 11 adapted to the pre-damping spring 3 is provided on the pre-damping upper cover plate 1. The pre-damping spring 3 is located in both the first pre-damping window 21 and the second pre-damping window 11, and a limiting plate 5 located outside the pre-damping spring 3 is fixed on the second pre-damping window 11 to limit the pre-damping spring 3.

[0020] Through the implementation of the above-described clutch driven plate assembly structure embodiment, the limiting plate 5, as a rigid structure fixed on the second pre-damping window 11, is directly located radially outside the pre-damping spring 3, forming an insurmountable physical barrier. When the clutch driven plate assembly structure rotates at high speed and generates a strong centrifugal force, or when the pre-damping spring 3 and the window experience wear and thermal expansion due to long-term alternating loads and high-temperature environment, resulting in an increased fit clearance between them and the first pre-damping window 21 and the second pre-damping window 11, the limiting plate 5 can effectively block the radial outward movement tendency of the pre-damping spring 3 along its compression-rebound motion trajectory, completely eliminating the possibility of the pre-damping spring 3 radially dislodging from the window.

[0021] Secondly, the pre-damping upper cover 1, through the clamping fit between the splined hub 4 and the pre-damping lower cover 2, ensures that the pre-damping spring 3 is firmly clamped between the pre-damping upper cover 1 and the pre-damping lower cover 2, effectively eliminating the space for axial upward movement of the pre-damping spring 3. This combined radial and axial constraint ensures that the spatial position of the pre-damping spring 3 is strictly limited within the cavity formed by the first pre-damping window 21 and the second pre-damping window 11 throughout the entire motion cycle, regardless of whether it is in a compressed, extended, or free state, achieving dynamic stability under all operating conditions. Based on this, under engine idling or low-speed, low-load conditions, the pre-damping spring 3 can continuously and reliably absorb and buffer the small torque fluctuations of the engine output, preventing these fluctuations from being directly transmitted to the gearbox input shaft through the splined hub 4.

[0022] Therefore, specifically, the pre-damping spring 3 can no longer disengage from its mounting position, completely eliminating the metallic noise caused by its free movement within the clutch driven plate assembly and its impact on the main damping assembly or other components. Simultaneously, engine torque fluctuations are effectively filtered, preventing abnormal vibrations in the transmission system and eliminating abnormal shaking in the steering wheel, seat, and chassis, significantly improving ride comfort at idle and low speeds. During gear shifts, the pre-damping spring 3, always in the correct working position, continuously provides cushioning against minor impacts, resulting in smooth low-gear shifts and avoiding significant jerking and lurching caused by the loss of cushioning function due to spring detachment. Furthermore, the reliable limiting of the pre-damping spring 3 completely eliminates the phenomenon of impact noise caused by its violent impact on other components due to inertia during acceleration or sudden load changes, eliminating the illusion of play in the transmission system. More importantly, the pre-damping spring 3 can no longer jam the main damping spring 7 or other key components, ensuring the independent function and reliable coordinated operation of the main damping assembly and the pre-damping assembly. This avoids the risk of the entire damping system failing due to interference and protects the steel plate structure and other components of the clutch driven plate assembly from impact damage. This significantly improves the reliability, durability, smoothness, and quietness of the clutch driven plate assembly and the entire transmission system.

[0023] Furthermore, the length direction of the limiting plate 5 is perpendicular to the length direction of the pre-damping spring 3, and the two ends of the limiting plate 5 are fixed on the opposite sides of the second pre-damping window 11. The limiting plate 5 has an outwardly convex arc structure along its length direction, and there is a clearance distance between the inner arc wall of the limiting plate 5 and the pre-damping spring 3.

[0024] Furthermore, multiple first pre-damping windows 21 are distributed along the circumferential direction of the pre-damping lower cover plate 2, and the second pre-damping window 11 corresponds one-to-one with the first pre-damping window 21.

[0025] By implementing the above-described clutch driven disc assembly structure embodiment, the limiting plate 5 is fixed perpendicular to the pre-damping spring 3, ensuring that the limiting plate 5 spans the radial outer side of the pre-damping spring 3, forming a rigid constraint barrier in the radial direction of the pre-damping spring 3, thereby directly resisting the bending, twisting or radial warping tendency that may occur in the pre-damping spring 3 under centrifugal force or alternating load.

[0026] Secondly, the limiting plate 5 has an outwardly convex arc-shaped structure along its length. This arc-shaped structure is compatible with the distribution characteristics of the centrifugal force on the pre-damping spring 3 and the spring compression and rebound trajectory when the clutch driven plate assembly rotates. The clearance between its inner arc wall and the pre-damping spring 3 ensures that the pre-damping spring 3 has sufficient compression and extension freedom throughout the entire motion cycle, avoiding frictional interference, additional wear, or movement jamming due to contact with the limiting plate 5. It also ensures that when the pre-damping spring 3 changes in size due to long-term wear, material thermal expansion, or manufacturing tolerances, this clearance can still serve as a safe buffer zone, preventing the pre-damping spring 3 from directly pressing the limiting plate 5 and causing deformation or functional failure of the pre-damping assembly. At the same time, the arc-shaped limiting plate 5 can also evenly distribute and guide the radial outward force of the pre-damping spring 3 to the fixed points at both ends, and transmit it to the entire pre-damping upper cover plate 1 through the edge of the second pre-damping window 11, thereby optimizing the mechanical transmission path and enhancing the structure's fatigue and impact resistance.

[0027] Furthermore, by utilizing the distribution of multiple first pre-damping windows 21 and second pre-damping windows 11, multiple pre-damping springs 3 are symmetrically and evenly arranged on the circumference of the clutch driven plate assembly structure. Each pre-damping spring 3 is independently housed within a corresponding set of first pre-damping windows 21 and second pre-damping windows 11 and is reliably limited by its respective limiting plate 5, thereby achieving load balance and coordinated operation of the pre-damping assembly in the circumferential direction. This multi-window distribution not only improves the ability and coverage of absorbing small torque fluctuations in the engine, making the damping effect smoother and more uniform, but also avoids uneven force distribution, rotational imbalance, and the resulting amplification of abnormal noise or increased vibration caused by the detachment of individual springs, since each pre-damping spring 3 is firmly fixed.

[0028] Furthermore, the main vibration damping assembly includes a main vibration damping base plate, a main vibration damping cover plate 6, and a main vibration damping spring 7. The main vibration damping cover plate 6 has a first main vibration damping window 61 adapted to the main vibration damping spring 7. The main vibration damping base plate is riveted and pressed to the main vibration damping base plate by rivets 8, and a second main vibration damping window adapted to the main vibration damping spring 7 is opened on the main vibration damping base plate. The main vibration damping spring 7 is located in both the first pre-vibration damping window 21 and the second pre-vibration damping window 11. The pre-damping lower cover plate 2 is riveted to the outer plate surface of the main damping cover plate 6, and the first main damping window 61 is distributed outside the second pre-damping window 11 ring.

[0029] Through the implementation of the above-described clutch driven plate assembly structure embodiment, the pre-damping lower cover plate 2 is directly riveted to the outer plate surface of the main damping cover plate 6, achieving rigid integration and direct force flow connection between the pre-damping assembly and the main damping assembly in terms of structure. This riveting method ensures no relative displacement between the pre-damping lower cover plate 2 and the main damping cover plate 6, providing a stable and reliable installation foundation for the first pre-damping window 21 fixed thereon, thereby indirectly enhancing the overall stability of the pre-damping spring 3 after it is constrained by the limiting plate 5, and preventing constraint failure due to loosening of the base support components.

[0030] Secondly, the specific circumferential spatial layout of the first main damping window 61, located outside the second pre-damping window 11, clarifies the division of labor and cooperation between the main damping assembly and the pre-damping assembly: the pre-damping spring 3, located inside the ring, focuses on absorbing small torque fluctuations under engine idling and low-speed conditions; while the main damping spring 7, located outside the ring and with a larger radius of action, is responsible for handling the larger torque transmitted by the engine under normal driving, acceleration, and load changes, and performs the main damping and buffering. This layered processing mechanism from the inside out allows vibrations and impacts of different amplitudes and frequencies to be efficiently absorbed by the most suitable spring system, avoiding functional overlap and interference.

[0031] From the perspective of mechanical transmission path analysis, the engine torque first acts on the pre-damping assembly. After initial filtering by it, the remaining fluctuations and main torque are transmitted to the main damping spring 7 located on the outside of the ring through the riveting point and the main damping cover 6. This allows the main damping spring 7 to resolve torque fluctuations with higher efficiency, thereby significantly reducing the vibration amplitude that is finally transmitted to the spline hub 4.

[0032] Furthermore, the main damping base plate, together with the main damping cover plate 6 riveted and pressed together by rivets 8, forms the main damping spring 7 housing structure, creating a composite damping module with extremely high overall rigidity. This not only ensures the reliable operation of the main damping spring 7 itself, but its robust construction also provides a solid foundation for the pre-damping assembly attached to it to withstand complex alternating loads. This allows the entire clutch driven plate assembly structure to maintain its structural integrity and geometric stability when dealing with the impacts of various engine operating conditions, thereby ensuring the positional stability and functional durability of all key components, including the main damping spring 7 and the pre-damping spring 3, under long-term harsh operating conditions.

[0033] Furthermore, the pre-damping lower cover plate 2 includes a first substrate 22 riveted to and attached to the main damping cover plate 6 by rivets 8, and a first assembly portion 23 formed by bending the outer edge of the first substrate 22 toward the pre-damping upper cover plate 1, and a first pre-damping window 21 is opened on the first assembly portion 23. The pre-damping upper cover plate 1 includes a second base plate 12 fixed on the spline hub 4, and a second assembly part 13 formed by bending the outer edge of the second base plate 12 toward the pre-damping lower cover plate 2. The second pre-damping window 11 is opened on the second assembly part 13. When the second substrate 12 is pressed together with the first substrate 22, a riveting space is formed between the second substrate 12 and the first substrate 22.

[0034] Through the implementation of the above-described clutch driven disc assembly structure embodiment, the first base plate 22 is directly riveted to and attached to the main damping cover plate 6 by rivets 8, ensuring that the mounting base of the pre-damping assembly and the main damping cover plate 6 of the main damping assembly are rigidly connected as one unit, the force flow is directly transmitted, and the possibility of loosening of the pre-damping assembly as a whole due to loose connection interface is eliminated, providing a fundamental structural guarantee for the stable operation of the pre-damping spring 3. Secondly, the first assembly part 23, formed by bending from the outer edge of the first substrate 22 toward the pre-damping upper cover plate 1, and the second assembly part 13, formed by bending from the outer edge of the second substrate 12 toward the pre-damping lower cover plate 2, greatly enhance the bending stiffness of the edge areas of the pre-damping upper cover plate 1 and the pre-damping lower cover plate 2 (i.e., the parts where the first pre-damping window 21 and the second pre-damping window 11 are opened) mechanically. This makes it less likely for the window structure to undergo plastic deformation or fatigue cracking when subjected to alternating load impacts from the pre-damping spring 3 for a long time, thereby maintaining the accuracy of the window's geometric dimensions for a long time and preventing the constraint failure of the pre-damping spring 3 due to window deformation.

[0035] Secondly, when the pre-damping upper cover plate 1 is pressed together with the pre-damping lower cover plate 2 through the splined hub 4, the second assembly part 13 and the first assembly part 23 are pressed together, which not only provides auxiliary constraint and support in the radial direction through the mating surfaces of the two assembly parts. More importantly, the riveting space formed between the second base plate 12 fixed on the spline hub 4 and the first base plate 22 riveted to the main damping cover plate 6 can, on the one hand, accommodate the head of the rivet 8 or related structure used to connect the main damping cover plate 6 and the main damping base plate, avoiding interference between the riveting structure inside the pre-damping assembly and the main damping assembly, and ensuring the independent assembly processability of each assembly and the compactness of the overall structure; on the other hand, by controlling the size of this space, the final clamping force of the second base plate 12 on the first base plate 22, as well as the alignment accuracy of the windows of the second assembly part 13 and the first assembly part 23, can be precisely set, thereby ensuring that the pre-damping spring 3 is accommodated without interference and precisely within the aligned first pre-damping window 21 and the second pre-damping window 11, and is firmly axially clamped.

[0036] From a working principle perspective, the torque fluctuation of the engine drives the pre-damping spring 3 to reciprocate within the first pre-damping window 21 and the second pre-damping window 11. The end force of the pre-damping spring 3 is directly transmitted to the window wall formed by the first assembly part 23 and the second assembly part 13. Since each assembly part is formed by bending corresponding base plates, it has high structural integrity and can effectively distribute the load to the first base plate 22 and the second base plate 12. Therefore, this cover plate structure composed of base plates and bent assembly parts not only achieves high rigidity, high precision manufacturing and long-term maintenance of the first pre-damping window 21 and the second pre-damping window 11, but also optimizes the axial stacking relationship and assembly stress distribution of the pre-damping assembly and the main damping assembly through the riveting space, making the clamping fit between the upper pre-damping cover plate 1 and the lower pre-damping cover plate 2 more reliable and controllable. All these structural optimizations serve to ensure that the pre-damping spring 3 is stably confined within its designed movement space under any operating conditions—including high centrifugal force, high temperature thermal expansion, material wear, and alternating stress—and will never dislodge from the first pre-damping window 21 and the second pre-damping window 11. This allows the pre-damping spring 3 to continuously and efficiently fulfill its function of absorbing idling and low-load torque fluctuations, greatly eliminating all possibilities of abnormal noise, vibration, shift jerking, and potential component damage caused by spring dislodgement, significantly improving the overall reliability and durability of the clutch driven plate assembly structure.

[0037] Furthermore, multiple first main vibration damping windows 61 are distributed along the circumference of the main vibration damping cover plate 6, and the second main vibration damping windows correspond one-to-one with the first main vibration damping windows 61. Limiting covers 62 that clamp the sides of the main vibration damping spring 7 are respectively fixed on the opposite two sides of the first main vibration damping window 61. The second assembly part 13 is distributed in multiple ways along the circumferential direction of the second substrate 12, and the first assembly part 23 corresponds to the second assembly part 13 one by one. A second assembly part 13 is distributed between each pair of adjacent first main vibration damping windows 61, and the outer edge of the second assembly part 13 presses against the limiting cover 62 on the inner ring side of the corresponding two first main vibration damping windows 61.

[0038] Through the implementation of the above-described clutch driven plate assembly structure embodiment, the limiting cover 62 effectively provides radial clamping constraint on the sides of the main damping spring 7 housed in the first main damping window 61 and the second main damping window. This clamping action directly restricts the lateral swaying, torsion, or circumferential movement of the main damping spring 7 when subjected to large torque alternating loads, ensuring that its compression-rebound motion always proceeds along the design axis. This significantly improves the damping stability and efficiency of the main damping assembly under high load conditions and prevents the main damping spring 7 from being worn due to abnormal movement and impact with the window edge.

[0039] Secondly, a second assembly part 13 is distributed between every two adjacent first main damping windows 61. This circumferential staggered layout enables a high degree of integration and compactness between the pre-damping assembly and the main damping assembly in space. Specifically, the outer edges of the second assembly parts 13 press against the limiting covers 62 on the inner ring sides of the corresponding two first main damping windows 61. When the pre-damping spring 3 operates and transmits force through the second assembly parts 13, the pressure exerted by the outer edges of the second assembly parts 13 on the limiting covers 62 directly acts on the main damping cover 6 structure. This not only enhances the installation rigidity and deformation resistance of the pre-damping assembly itself, but also directly and smoothly diverts and guides part of the load borne by the pre-damping assembly (especially the radial component) through the robust intermediate structure of the limiting covers 62 to the main damping cover 6 and the rigid frame of the entire main damping assembly, optimizing the overall force distribution. Simultaneously, this pressing relationship also constrains any minor deformation or displacement that may occur in the pre-damping spring 3, further stabilizing the constraint environment of the pre-damping spring 3.

[0040] From a system coordination perspective, both the main damping spring 7 and the pre-damping spring 3 are in a highly stable mechanical environment with multiple reinforcements: the main damping spring 7 is reliably clamped by the limiting cover 62, focusing on efficiently handling high torque fluctuations; the pre-damping spring 3 is constrained within the window by the limiting plate 5, and is rigidly connected to the limiting cover 62 and cover plate structure of the main damping assembly through the second assembly part 13, focusing on absorbing small torque fluctuations. The two functions are distinct, yet they complement each other structurally and mutually enhance rigidity through the key interface of the second assembly part 13 pressing against the limiting cover 62, together forming a composite damping system with extremely strong impact and deformation resistance. This ensures that under all operating conditions, whether it is small vibration at idle or large torque impact during driving, the pre-damping spring 3 will not cause abnormal displacement, detachment, or system structural instability, thus effectively avoiding abnormal noise, transmission vibration, and shifting jerks caused by uncontrolled movement of the pre-damping spring 3, and greatly extending the service life of all related components of the clutch driven plate assembly structure.

[0041] Furthermore, the limiting cover 62 on the outer ring side of the first main vibration damping window 61 has an outwardly convex arc-shaped structure, the limiting cover 62 on the inner ring side of the first main vibration damping window 61 is straight, and the outer edge of the second assembly part 13 at the pressing point is a straight line that fits the corresponding limiting cover 62.

[0042] Furthermore, a plurality of second assembly portions 13 on the outer edge of the second substrate 12 are continuously formed along the circumferential direction, and the connecting edge between two adjacent second assembly portions 13 has an inwardly concave arc-shaped structure.

[0043] Through the implementation of the above-described clutch driven disc assembly structure embodiment, the limiting cover 62 on the outer ring side of the first main damping window 61 adopts an outwardly convex arc structure, so that its inner arc wall can closely fit the arc-shaped outward expansion deformation of the main damping spring 7 when subjected to large torque compression. This provides effective radial clamping constraint while ensuring the continuity and smoothness of the contact surface, significantly reducing the risk of local stress concentration and abnormal wear between the spring and the limiting cover 62, and making the motion guidance of the main damping spring 7 smoother.

[0044] The limiting cover 62 on the inner ring side of the first main damping window 61 is designed as a straight line, and the outer edge of the second assembly part 13 at the pressing point is also designed as a straight line. This corresponding structure allows the outer edge of the second assembly part 13 to achieve maximum planar contact and stable pressing with the side wall of the straight limiting cover 62, thereby establishing a rigid and wobbly force transmission interface between the pre-damping assembly and the main damping assembly. This straight pressing fit not only transmits the load generated by the pre-damping assembly during operation evenly and directly to the main damping cover plate 6 structure, enhancing the overall rigidity of the system, but also forms a reverse support for the pre-damping assembly itself, effectively suppressing the possible inward micro-deformation of the pre-damping spring 3 under impact, further stabilizing the constraint effect on the pre-damping spring 3.

[0045] Furthermore, by continuously forming multiple second assembly parts 13 along the circumferential direction, the integrated structure greatly enhances the overall circumferential stiffness and torsional load resistance of the pre-damping cover plate 1, avoiding weak points and stress concentrations that may occur at the joints due to the split structure. At the same time, the connecting edge between two adjacent second assembly parts 13 has an inwardly concave arc structure, ensuring that when the second assembly parts 13 are densely distributed around the circumference and press against the limiting cover 62, their connecting edge will not interfere with other structures of the main damping cover plate 6, achieving an extremely compact integration of the pre-damping assembly and the main damping assembly in radial and axial space; it also plays a role in uniform stress transition, optimizing the stress distribution of the second base plate 12 in the area between adjacent second assembly parts 13, and improving its fatigue resistance.

[0046] In summary, the clutch driven plate assembly structure of this utility model embodiment can achieve efficient and smooth force transmission and an extremely compact structure. It also ensures that the main damping spring 7 and the pre-dampening spring 3 can maintain a precise and stable working trajectory and relative position under extremely complex and harsh alternating load conditions. This eliminates a series of abnormal noises, vibrations and reliability problems caused by the failure of the pre-dampening spring 3 constraint or deformation and interference of structural components, thereby significantly improving the smoothness, quietness and durability of the transmission system.

[0047] Furthermore, the main damping base plate and the main damping cover plate 6 are both provided with spline shaft holes that are adapted to the spline hub 4 in the middle, and the first base plate 22 and the second base plate 12 are both provided with central shaft holes that cooperate with the spline hub 4 in the middle.

[0048] Furthermore, an annular positioning groove 41 is provided on the outer wall of the spline hub 4, the inner diameter of the central shaft hole on the second substrate 12 is smaller than the inner diameter of the central shaft hole on the first substrate 22, and the inner edge of the central shaft hole on the second substrate 12 is embedded in the positioning groove 41.

[0049] Through the implementation of the above-described clutch driven disc assembly structure embodiment, spline shaft holes adapted to spline hub 4 are opened in the middle of the main damping base plate and the main damping cover plate 6, and central shaft holes that cooperate with spline hub 4 are opened in the middle of the first base plate 22 of the pre-damping lower cover plate 2 and the second base plate 12 of the pre-damping upper cover plate 1. This establishes a unified and precise rotation center and assembly reference based on the axis of spline hub 4 for all core components of the entire clutch driven disc assembly structure, so as to ensure the concentricity of all components under dynamic rotation and avoid rotational imbalance vibration caused by eccentric mass distribution.

[0050] Secondly, an annular positioning groove 41 is opened on the outer wall of the spline hub 4 shaft, and the inner edge of the central shaft hole on the second base plate 12 is directly embedded into the positioning groove 41 of the spline hub 4. This achieves absolute positioning of the pre-damping cover plate 1 in the axial direction and complete circumferential fixation of the spline hub 4, so that there is no possibility of any axial movement or relative circumferential rotation between the second base plate 12 and the spline hub 4. This ensures that the pre-damping spring 3 can always be firmly constrained by the limiting plate 5 within the first pre-damping window 21 and the second pre-damping window 11, ensuring the reliable realization of the pre-damping function. Ultimately, this eliminates all risks of abnormal noise, vibration, shift jerking and component damage caused by the pre-damping spring 3 falling off or malfunctioning. This greatly improves the overall performance and service life of the clutch driven plate assembly structure.

[0051] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of this utility model.

Claims

1. A clutch driven plate assembly structure, characterized in that: The clutch driven plate assembly structure includes a splined hub, and a main damping assembly and a pre-damping assembly mounted on the splined hub; The pre-damping assembly includes a pre-damping upper cover plate, a pre-damping lower cover plate, and a pre-damping spring. The pre-damping lower cover plate is fixed to the main damping assembly, and a first pre-damping window adapted to the pre-damping spring is provided on the pre-damping lower cover plate. The pre-damping upper cover plate is pressed together with the pre-damping lower cover plate through the splined hub, and a second pre-damping window adapted to the pre-damping spring is provided on the pre-damping upper cover plate. The pre-damping spring is located in both the first and second pre-damping windows, and a limiting plate located outside the pre-damping spring and limiting the pre-damping spring is fixed on the second pre-damping window.

2. The clutch driven plate assembly structure according to claim 1, characterized in that: The length direction of the limiting plate is perpendicular to the length direction of the pre-damping spring, and the two ends of the limiting plate are fixed on the opposite sides of the second pre-damping window. The limiting plate has an outwardly convex arc structure along its length direction, and there is a clearance distance between the inner arc wall of the limiting plate and the pre-damping spring.

3. The clutch driven plate assembly structure according to claim 1 or 2, characterized in that: The first pre-damping window is distributed in multiple ways along the circumference of the pre-damping lower cover plate, and the second pre-damping window corresponds one-to-one with the first pre-damping window.

4. The clutch driven plate assembly structure according to claim 1, characterized in that: The main vibration damping assembly includes a main vibration damping base plate, a main vibration damping cover plate, and a main vibration damping spring. The main vibration damping cover plate has a first main vibration damping window adapted to the main vibration damping spring. The main vibration damping base plate is riveted and pressed together with the main vibration damping base plate by rivets. The main vibration damping base plate also has a second main vibration damping window adapted to the main vibration damping spring. The main vibration damping spring is located in both the first pre-vibration damping window and the second pre-vibration damping window. The pre-damping lower cover plate is riveted to the outer plate surface of the main damping cover plate, and the first main damping window is distributed outside the second pre-damping window ring.

5. The clutch driven plate assembly structure according to claim 4, characterized in that: The pre-damping lower cover plate includes a first substrate riveted to and attached to the main damping cover plate by the rivets, and a first assembly part formed by bending the outer edge of the first substrate toward the pre-damping upper cover plate, wherein the first pre-damping window is opened on the first assembly part. The pre-damping upper cover plate includes a second base plate fixed on the spline hub, and a second assembly portion formed by bending the outer edge of the second base plate toward the pre-damping lower cover plate, wherein the second pre-damping window is opened on the second assembly portion; When the second substrate is pressed together with the second assembly part and the first assembly part, a riveting space is formed between the second substrate and the first substrate.

6. The clutch driven plate assembly structure according to claim 5, characterized in that: The first main vibration damping window is distributed in multiple ways along the circumference of the main vibration damping cover plate, and the second main vibration damping window corresponds to the first main vibration damping window one by one. The two opposite sides of the first main vibration damping window are respectively fixed with limiting covers that clamp the sides of the main vibration damping spring. The second assembly part is distributed in multiple ways along the circumferential direction of the second substrate, and the first assembly part corresponds to the second assembly part one by one. One second assembly part is distributed between each pair of adjacent first main vibration damping windows, and the outer edge of the second assembly part presses against the limiting cover on the inner ring side of the corresponding two first main vibration damping windows.

7. The clutch driven plate assembly structure according to claim 6, characterized in that: The limiting cover on the outer ring side of the first main vibration damping window has an outwardly convex arc-shaped structure, the limiting cover on the inner ring side of the first main vibration damping window is straight, and the outer edge of the second assembly part at the pressing point is a straight line that fits the corresponding limiting cover.

8. The clutch driven plate assembly structure according to claim 7, characterized in that: The second mounting portions on the outer edge of the second substrate are continuously formed along the circumferential direction, and the connecting edge between two adjacent second mounting portions has an inwardly concave arc-shaped structure.

9. The clutch driven plate assembly structure according to claim 5, characterized in that: Both the main damping base plate and the main damping cover plate have spline shaft holes adapted to the spline hub in their middle portions, and both the first base plate and the second base plate have central shaft holes that mate with the spline hub in their middle portions.

10. The clutch driven plate assembly structure according to claim 9, characterized in that: The outer wall of the splined hub is provided with an annular positioning groove. The inner diameter of the central shaft hole on the second substrate is smaller than the inner diameter of the central shaft hole on the first substrate, and the edge of the inner hole of the central shaft hole on the second substrate is embedded in the positioning groove.

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