Clutch diaphragm spring

Abstract

According to the technical scheme, the clutch diaphragm spring is characterized by comprising a disc spring and a plurality of separating levers connected with an inner ring of the disc spring. The separating lever is composed of a deformation part and a driving part, the deformation part is connected with the inner ring of the disc spring through a connecting mechanism, and the connecting mechanism allows the separating lever to freely rotate relative to the disc spring and achieve elastic reset. When the separating lever is not stressed, the separating lever is inclined to form a fan blade structure to play a role in heat dissipation, the connecting mechanism comprises a mounting groove and a rolling shaft, and the end of the rolling shaft is of a spherical structure and is matched with an arc-shaped groove, so that the separating lever rotates more smoothly, and friction and abrasion are reduced. The surface of the separating lever is provided with the protruding part and the concave part, the airflow path is optimized, the wind noise is reduced, and the system mute performance is enhanced. Through the design, the durability, the heat dissipation performance and the operation stability of the clutch are remarkably improved, and the clutch is suitable for the high-performance requirement of a new energy automobile clutch.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and in particular to a clutch diaphragm spring. Background Art

[0002] The diaphragm spring is a special spring on the car clutch. As a compression spring, the so-called diaphragm spring is stamped from spring steel and has a truncated cone-shaped thin-walled diaphragm in the shape of a bottomless dish. There are many radial slots on the cone surface from its small end to form an elastic lever, while the remaining ungrooved large end truncated cone part acts as a spring. The diaphragm spring is the most critical part of the clutch, playing the role of generating compression force on the pressure plate, cutting off power, and overload protection.

[0003] At present, hybrid vehicles and plug-in hybrid vehicles in new energy vehicles still have clutch components, and the diaphragm spring, as a component of the clutch, has no special structural difference in essence between new energy vehicles and traditional gasoline vehicles. However, compared with traditional vehicles, plug-in hybrid vehicles are usually equipped with multiple power sources such as engines, electric motors and battery packs. These power sources will generate heat when working, and because they are all integrated in a compact space, the superposition effect of heat will make the working environment temperature of the clutch higher; at the same time, in some plug-in hybrid vehicles, the clutch is also used to switch between the electric motor and the internal combustion engine to ensure a smooth driving experience, which will cause the clutch on the hybrid vehicle to work more frequently, which will cause the diaphragm spring to generate a lot of heat in a short time. Therefore, the diaphragm spring needs to have stronger heat dissipation performance to prevent high temperature from causing thermal expansion and thermal stress concentration of the diaphragm spring material, which will affect its elastic properties and shape stability, resulting in performance degradation or even failure of the clutch. Summary of the invention

[0004] The present invention provides a clutch diaphragm spring, which solves the problem of poor heat dissipation effect of the diaphragm spring in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a clutch diaphragm spring, including a disc spring and a plurality of release levers connected to the inner ring of the disc spring, the release lever including a deformation portion connected to the inner ring of the disc spring and a driving portion extending from the deformation portion toward the center of the disc spring, a connecting mechanism is arranged between the deformation portion and the inner ring of the disc spring, the connecting mechanism is used to enable the release lever and the disc spring to rotate relative to each other and to reset elastically; when the driving portions of the plurality of release levers are not squeezed, the release lever is tilted toward the pressure plate of the clutch under the action of the connecting mechanism to form a fan blade structure.

[0006] The present invention is further configured such that the connecting mechanism includes a plurality of mounting grooves arranged on the side walls of the inner ring of the disc spring, wherein a roller connected to the deformation portion is rotatably arranged inside the groove, and a driving mechanism is also arranged in the mounting groove for driving the separation lever to rotate to an inclined state through the roller.

[0007] The present invention is further configured such that the mounting groove is in the shape of an elongated strip, and the driving mechanism includes a reset spring arranged inside the mounting groove and connected to the roller, wherein the reset spring is used to drive the separation lever to elastically reset to an inclined state.

[0008] The present invention is further configured such that the deformation portion and the driving portion are in a fan-shaped structure, and an arc-shaped guide surface is provided on an edge of the side facing the clutch pressure plate.

[0009] The present invention is further configured such that the disc spring is assembled from a plurality of arc-shaped connecting blocks, wherein the connecting block includes a connecting body connected to the separation lever, and tenons and mortises are respectively provided on both sides of the connecting body, and two adjacent connecting bodies are plug-fitted with each other through the tenons and mortises.

[0010] The present invention is further configured such that a stabilizing rod extending along the length direction of the installation groove is provided on the roller, the return spring is abutted between the installation groove and the stabilizing rod, and a limit block is also provided on the inner wall of the installation groove to limit the stabilizing rod from swinging in the direction of the return spring.

[0011] The present invention is further configured such that the deformation portion is provided with a plurality of raised portions protruding toward the clutch pressure plate, and the raised portions are provided with recessed portions corresponding to the positions of the raised portions on a side of the deformation portion away from the clutch pressure plate.

[0012] The present invention is further configured such that the plug-in tenon extends along the side of the connecting block to form a long strip structure with a conical cross-section, the upper and lower sides of the plug-in tenon protrude outward to form a clamping portion, and clamping grooves that are clamped and matched with the clamping portion are provided on both sides of the inner wall of the plug-in tenon.

[0013] The present invention is further configured such that the cross section of the mounting groove is in an arc shape, and the end of the roller connected to the mounting groove is in a spherical structure.

[0014] In summary, the beneficial effects of the present invention are: Compared with the prior art, the present application realizes elastic rotation connection of the release lever through a connecting mechanism and a disc spring. When the clutch is not activated (the release lever is not squeezed), the release lever will automatically return to an inclined state under the elastic action of the connecting structure, so that it faces the clutch pressure plate in the form of a fan blade structure. When the clutch is driven to rotate during driving of the vehicle, the inclined release lever can guide the outside air into the clutch, accelerate the internal air flow, and thereby enhance the heat dissipation effect of the clutch, thereby achieving rapid heat dissipation of the diaphragm spring, avoiding thermal fatigue damage of the diaphragm spring under the dual effects of high temperature and frequent operation, affecting the normal operation of the clutch, thereby ensuring smooth switching and transmission of power between different power sources.

[0015] During the operation of the clutch, the externally applied pressure will act on the driving part of the release lever, allowing the deformation part to rotate relatively along the inner ring of the disc spring under the guidance of the connecting mechanism, so that the release lever rotates to a horizontal state. At this time, the external pressure continues to act on the driving part to cause the deformation part to deform and drive the disc spring away from the pressure plate, thereby achieving clutch; and when the driving disc spring is deformed and moves away from the pressure plate, the horizontally arranged release lever allows it to be evenly stressed when subjected to external pressure, avoiding stress concentration that is prone to occur in an inclined state, thereby avoiding damage or fatigue failure of components and improving the durability of the entire clutch system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the diaphragm spring when the clutch of this embodiment is working.

[0017] Figure 2 It is a schematic diagram of the diaphragm spring when the clutch of this embodiment is not working.

[0018] Figure 3 This is the front structural diagram of the separation lever.

[0019] Figure 4 This is a diagram of the back structure of the separation lever.

[0020] Figure 5 It is a schematic diagram of the connection structure.

[0021] Figure 6 It is a structural diagram of the plug-in mortise and tenon of the present embodiment.

[0022] Figure 7 It is a structural diagram of the plug-in tenon of this embodiment.

[0023] Figure 8 It is a schematic diagram of the driving mechanism.

[0024] Fig. 9 yes Figure 8 Enlarged view of point A.

[0025] Figure numerals: 1. disc spring; 11. connecting body; 2. separation lever; 21. deformation part; 22. driving part; 3. connecting mechanism; 31. mounting groove; 32. roller; 33. driving mechanism; 34. return spring; 35. stabilizer bar; 36. limit block; 4. guide surface; 5. tenon; 51. clamping part; 6. mortise; 61. clamping groove; 7. raised part; 8. recessed part. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0027] like Figure 1-9 As shown, the present embodiment discloses a clutch diaphragm spring, comprising a disc spring 1 and a plurality of release levers 2 connected to the inner ring of the disc spring 1, the release lever 2 comprising a deformation portion 21 connected to the inner ring of the disc spring 1 and a driving portion 22 extending from the deformation portion 21 toward the center of the disc spring 1, a connecting mechanism 3 is provided between the deformation portion 21 and the inner ring of the disc spring 1, the connecting mechanism 3 is used to enable the release lever 2 and the disc spring 1 to rotate relative to each other and to reset elastically; when the driving portions 22 of a plurality of release levers 2 are not squeezed, the release lever 2 is tilted toward the pressure plate of the clutch under the action of the connecting mechanism 3 to form a fan blade structure.

[0028] like Figure 2 As shown, when the release lever 2 is not acted upon by an external force, the release lever 2 will tilt under the drive of the connection structure to form a fan blade structure. This fan structure can generate effective air flow when the clutch rotates at high speed during the operation of the car. When the clutch rotates, the disc spring 1 will rotate at high speed along with the movement of the release lever 2, and the tilted state of the release lever 2 makes it act as a heat dissipation fan blade, which can guide the outside air into the clutch and blow toward the clutch pressure plate, thereby accelerating the air flow in the clutch working area to improve the heat dissipation effect. In this way, under the dual effects of high temperature and frequent operation, the clutch can quickly dissipate heat and maintain a low temperature, avoiding the performance degradation, increased wear or damage to the diaphragm spring due to overheating. This structure achieves effective passive heat dissipation through simple physical movement, without the need for additional cooling devices, and improves the overall reliability and durability of the system.

[0029] like Figure 1As shown, when the release fork on the car drives the release bearing to push the release lever 2, external force is applied to the drive part 22 of the release lever 2. The drive part 22 of the release lever 2 will first rotate from the initial tilted state under the action of the connecting mechanism 3 and drive the deformation part 21 to rotate to the horizontal state. At this time, the horizontally arranged release lever 2 ensures that the contact surface between the release bearing and the drive part 22 is increased, thereby reducing local stress concentration and evenly distributing external force. Compared with the tilted or asymmetric state, the horizontal state can ensure smoother contact between the release lever 2 and the release bearing, reduce wear caused by friction, and avoid stress concentration that is easy to occur in the tilted state. Stress concentration often leads to damage or fatigue failure of local components, while the horizontal state can disperse external forces, reduce damage to the release lever 2 and related connecting components, thereby improving the durability of the entire clutch system. At the same time, the action of the lever is more stable, avoiding irregular movement caused by tilting. This stable form of movement allows the clutch to operate more smoothly during separation and engagement, reducing unnecessary vibration and impact.

[0030] As the external force is further applied, the deformation portion 21 of the separation lever 2 begins to deform, driving the disc spring 1 away from the pressure plate. Since the disc spring 1 is deformed by the driving portion 22 of the separation lever 2, the clutching process of the disc spring 1 can be carried out smoothly and accurately, reducing mechanical shock and unnecessary energy loss during operation. This design drives the disc spring 1 away from the pressure plate through deformation, which ensures a smooth clutch separation process, thereby effectively improving the working stability of the clutch and extending the service life of the system.

[0031] like Figure 3-4 As shown, the deformation part 21 is provided with a plurality of raised parts 7 protruding toward the clutch pressure plate, and the raised parts 7 are formed with recessed parts 8 corresponding to the positions of the raised parts 7 on the side of the deformation part 21 away from the clutch pressure plate.

[0032] The surface of the deformation portion 21 of the release lever 2 is designed with a number of protrusions 7 and recesses 8. These designs are not only changes in appearance, but also have important aerodynamic functions, especially playing a key role in reducing wind noise.

[0033] The raised portion 7 is a structure that protrudes toward the clutch pressure plate along the surface of the deformed portion 21, while the recessed portion 8 is located on the opposite side of the deformed portion 21, corresponding to the raised portion 7. The combined design between the raised portion 7 and the recessed portion 8 effectively changes the distribution and path of the airflow. When the release lever 2 rotates at high speed, the air will flow through the raised portion 7 and the recessed portion 8. Generally, when the air flows through a structure similar to a flat surface, vortices and turbulence will be generated at the rear, and these vortices and turbulence are the main source of wind noise.

[0034] By providing the protrusions 7 on the deformation portion 21, the air flow is guided to produce a certain diversion effect when encountering these protrusions, thereby reducing the intensity of the vortex formation. At the same time, the recessed portion 8 plays a role in dissipating the vortex on the other side. When the airflow passes through the recessed portion 8, the vortex is redirected and dispersed, reducing the negative pressure area formed by the air behind the surface, further reducing the intensity of turbulence and the generation of wind noise. This design principle is similar to the spoiler structure in some aerodynamic applications, which is used to optimize air flow and reduce noise.

[0035] Through the combined effect of the raised portion 7 and the recessed portion 8, the source of wind noise is greatly weakened, and the air flow is more stable, so that the noise generated by the release lever 2 when rotating at high speed is significantly reduced. This noise reduction design ensures the silent effect of the system when running at high speed, improves the use experience of the clutch, and has significant advantages, especially in application scenarios such as new energy vehicles that have high requirements for noise control.

[0036] On the basis of the above, the deformation part 21 and the driving part 22 are in a fan-shaped structure, and an arc-shaped guide surface 4 is provided on the edge of the side facing the clutch pressure plate.

[0037] The arc-shaped guide surface 4 further improves the aerodynamic performance. During the rotation of the release lever 2, the guide surface 4 can effectively guide the air flow, thereby reducing wind resistance and improving the heat dissipation effect. Combined with the fan blade structure, the guide surface 4 can ensure the continuity of airflow and the efficiency of heat dissipation when the release lever 2 switches between the horizontal and inclined states, so that the clutch system can still maintain a stable temperature under high temperature or high load conditions.

[0038] like Figure 6 , Figure 8-9 As shown, a connection structure is used to realize rotational connection between the separation lever 2 and the inner ring of the disc spring 1. The connection structure includes a plurality of mounting grooves 31 arranged on the side wall of the inner ring of the disc spring 1, and a roller 32 connected to the deformation portion 21 is rotatably arranged inside the mounting groove 31. A driving mechanism 33 is also arranged in the mounting groove 31 for driving the separation lever 2 to rotate to an inclined state through the roller 32; the mounting groove 31 is in the shape of a long strip, and the driving mechanism 33 includes a reset spring 34 arranged inside the mounting groove and connected to the roller 32, and the reset spring 34 is used to drive the separation lever 2 to elastically reset to an inclined state, wherein the reset spring 34 can be a coil spring connected between the roller 32 and the mounting groove 31, or it can be an ordinary spring.

[0039] Meanwhile, a stabilizing rod 35 extending along the length direction of the mounting groove 31 is arranged on the roller 32 , a return spring 34 is pressed between the mounting groove 31 and the stabilizing rod 35 , and a limit block 36 is arranged on the inner wall of the mounting groove 31 to limit the stabilizing rod 35 from swinging in the direction of the return spring 34 .

[0040] When the release bearing releases the external force on the drive unit 22 of the release lever 2, the stabilizer bars 35 on both sides of the roller 32 will quickly return from the horizontal state to the initial tilted state under the action of the reset spring 34. The reset spring 34 ensures that the release lever 2 can be quickly reset after the operation is completed through the elastic restoring force, maintains the high responsiveness of the clutch and makes the reset process fast and accurate, which helps to improve the overall working efficiency of the clutch under frequent operation. The stabilizer bar 35 can ensure that the roller 32 remains stable during the reset process. The bar extends along the length direction of the mounting groove 31 to prevent the roller 32 from swinging or deflecting unnecessarily during the movement, further improving the reset accuracy of the release lever 2. The limit block 36 can abut against the end of the stabilizer bar 35, thereby limiting the stabilizer bar 35 from swinging in the direction of the spring, avoiding the excessive tilt of the release lever 2 and the inability to maintain a horizontal state when the release bearing applies a force to the drive unit 22 of the release lever 2.

[0041] The cross section of the mounting groove 31 is in an arc shape, and the end of the roller 32 connected to the mounting groove 31 is in a spherical structure.

[0042] Since the end of the roller 32 is a spherical structure, it can roll along multiple degrees of freedom in the mounting groove 31. When the separation lever 2 rotates from the initial tilted state to the horizontal state, the roller 32 can freely adjust the angle and roll smoothly to adapt to the different movement directions and angle changes of the separation lever 2. This makes the entire rotation process more flexible, and can automatically adapt to the movement trajectory of the separation lever 2 according to the change of the operating force, reducing the jamming phenomenon during the rotation process. Compared with the traditional cylindrical roller 32 or other single-degree-of-freedom designs, the spherical roller 32 can not only rotate in the axial direction after being subjected to force, but also adjust its own angle in all directions, ensuring the smoothness of the movement of the separation lever 2.

[0043] Unlike traditional sliding friction, the rolling friction of the spherical roller 32 in the arc groove is lighter. This design reduces the direct contact area between the roller 32 and the groove wall, minimizing the friction. By converting sliding friction into rolling friction, the roller 32 will not generate a large resistance when the release lever 2 moves, thereby reducing energy loss and improving operating efficiency. At the same time, the reduced friction also significantly reduces the wear between the roller 32 and the groove wall, extending the service life of the entire system. This is particularly important for the frequently operated clutch system, which can effectively avoid the loss of accuracy or damage to components caused by long-term friction. And when the external force is released, the release lever 2 returns to the initial tilted state from the horizontal state under the action of the reset spring 34. At this time, the spherical roller 32 can roll smoothly in the arc groove, ensuring that the reset process of the release lever 2 is smooth and fast. Compared with other roller 32 structures, the spherical design can reduce friction during the reset process, avoid reset hysteresis or instability caused by excessive friction, and enable the clutch system to maintain high responsiveness and reliability during frequent operations.

[0044] At the same time, when the roller 32 contacts the groove wall, the spherical roller 32 can evenly distribute the force on the surface of the arc groove due to its circular contact surface, rather than concentrating it on a certain point or a certain line. This uniform force effect avoids the problem of excessive local stress and prevents the groove wall from being worn or deformed due to local force concentration. The uniformly distributed stress can also make the rotation of the separation lever 2 more stable, thereby ensuring that the entire system can still maintain high efficiency and reliability during long-term high-load operation.

[0045] like Figure 5-7 As shown, the disc spring 1 is assembled from a number of arc-shaped connecting blocks, the connecting block includes a connecting body 11 connected to the separation lever 2, and the two sides of the connecting body 11 are respectively provided with a plug-in tenon 5 and a plug-in mortise 6, and the two adjacent connecting bodies 11 are plug-fitted through the plug-in tenon 5 and the plug-in mortise 6.

[0046] The combined disc spring 1 can facilitate the assembly connection between the connection block and the separation lever 2, thereby facilitating maintenance; and the plug-in tenon 5 extends along the side of the connection block to form a long strip structure with a conical cross section, and the upper and lower sides of the plug-in tenon 5 protrude outward to form a clamping portion 51, and the inner walls of the plug-in mortise 6 are provided with clamping grooves 61 that are clamped with the clamping portion 51. The plug-in tenon 5 and the plug-in mortise 6 with a conical cross section, as well as the tenon and the mortise, and the clamping portion 51 and the clamping groove 61 further improve the connection strength and stability. This plug-in structure ensures that the disc spring 1 will not loosen or deform during long-term use, thereby enhancing the overall strength and reliability of the disc spring 1, while also facilitating maintenance and disassembly, simplifying the system maintenance process.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A clutch diaphragm spring, comprising a disc spring (1) and a plurality of release levers (2) connected to the inner ring of the disc spring (1), characterized in that: The separation lever (2) comprises a deformation portion (21) connected to the inner ring of the disc spring (1) and a driving portion (22) extending from the deformation portion (21) toward the center of the disc spring (1); a connecting mechanism (3) is provided between the deformation portion (21) and the inner ring of the disc spring (1); the connecting mechanism (3) is used to enable the separation lever (2) and the disc spring (1) to rotate relative to each other and to reliably reset; when the driving portions (22) of the plurality of separation levers (2) are not squeezed, the separation levers (2) are tilted toward the clutch pressure plate under the action of the connecting mechanism (3) to form a fan blade structure.

2. A clutch diaphragm spring according to claim 1, characterized in that: The connecting mechanism (3) comprises a plurality of mounting grooves (31) arranged on the inner ring side wall of the disc spring (1), wherein a roller (32) connected to the deformation portion (21) is rotatably arranged inside the mounting groove (31), and a driving mechanism (33) is also arranged in the mounting groove (31) for driving the separation lever (2) to rotate to a tilted state via the roller (32).

3. A clutch diaphragm spring according to claim 2, characterized in that: The mounting groove (31) is in the shape of an elongated strip, and the driving mechanism (33) comprises a return spring (34) disposed therein and connected to the roller (32), wherein the return spring (34) is used to drive the separation lever (2) to elastically return to a tilted state.

4. A clutch diaphragm spring according to any one of claims 1 to 3, characterized in that: The deformation portion (21) and the driving portion (22) are in a fan-shaped structure, and an arc-shaped flow guide surface (4) is provided on an edge of the side facing the clutch pressure plate.

5. A clutch diaphragm spring according to claim 4, characterized in that: The disc spring (1) is assembled from a plurality of arc-shaped connecting blocks, wherein the connecting block comprises a connecting body (11) connected to the separation lever (2), and plug-in tenons (5) and plug-in mortises (6) are respectively provided on both sides of the connecting body (11), and two adjacent connecting bodies (11) are plugged together through the plug-in tenons (5) and the plug-in mortises (6).

6. A clutch diaphragm spring according to claim 3, characterized in that: The roller (32) is provided with a stabilizing rod (35) extending along the length direction of the mounting groove (31); the return spring (34) is abutted between the mounting groove (31) and the stabilizing rod (35); and the inner wall of the mounting groove (31) is further provided with a limit block (36) for limiting the stabilizing rod (35) from swinging in the direction of the return spring (34).

7. A clutch diaphragm spring according to claim 4, characterized in that: The deformation portion (21) is provided with a plurality of raised portions (7) protruding in the direction of the clutch pressure plate, and the raised portions (7) are provided with recessed portions (8) corresponding to the positions of the raised portions (7) on a side of the deformation portion (21) away from the clutch pressure plate.

8. The clutch diaphragm spring according to claim 5, characterized in that: The plug tenon (5) extends along the side of the connection block to form a long strip structure with a conical cross section. The upper and lower sides of the plug tenon (5) protrude outward to form a clamping portion (51). The inner wall of the plug tenon (6) is provided with clamping grooves (61) that are clamped with the clamping portion (51).

9. A clutch diaphragm spring according to claim 3, characterized in that: The cross section of the mounting groove (31) is in the shape of an arc, and the end of the roller (32) connected to the mounting groove (31) is in the shape of a spherical structure.

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