Torque-limiting shock absorber with double-disc-spring structure for stabilizing torque
By adopting a double disc spring structure in the torque-limiting vibration damper, the fulcrum of the inner pressure disc spring is solved, and the problems of insufficient internal pressure and stress concentration in traditional torque-limiting vibration damper are achieved, and more stable torque conduction and longer The service life of the product reduces material consumption and cost.
Patent Information
- Application Number
- CN202421096380.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The traditional torque-limited vibration damper cannot press the friction plate when the pressure inside the pressure disc spring is insufficient, resulting in slippage. When the internal pressure is too high, the upper cover plate is warped and deformed, and the stress concentration causes the lower pad plate to tilt and the friction plate to grind and shorten. Service life.
Using a double disc spring structure, an internal pressure disc spring with a small outer diameter is added to form two fulcrum contacts, making the stress more uniform, and through the contact and fit between the external pressure disc spring and the internal pressure disc spring, improving the fulcrum position and deformation optimize frictional force conduction.
More stable torque conduction is achieved, reducing deformation of the upper cover and lower pads, extending the service life of the equipment, and reducing material consumption and cost.
Smart Images
Figure CN222315801U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of torque limiting vibration dampers, in particular to a torque limiting vibration damper with a double disc spring structure and stable torque. Background Art
[0002] Like the working principle of the clutch, the torque limiter requires an external force to compress the friction plate when working. The traditional clutch relies on the diaphragm spring in the cover and pressure plate assembly to push the pressure plate, thereby compressing the friction plate to transmit torque. The torque limiter uses the internal pressure generated by the deformation of the pressure disc spring during riveting, and then compresses the friction plate through the lower pad. The friction plate on the other side compresses the flywheel of the engine, thereby driving the entire torque transmission system to work through the rotation of the flywheel. However, in actual use, if the internal pressure of the pressure disc spring is too small, the friction plate cannot be compressed, causing the friction plate and the lower pad to be in a slipping state and unable to transmit torque normally; if the internal pressure of the pressure disc spring is too large, the upper cover plate will be warped and deformed. In addition, since the existing design of the pressure disc spring has only one fulcrum, stress concentration can easily cause the lower pad to tilt unilaterally, and the friction plate will produce eccentric wear, thereby shortening the service life of the torque limiter. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a torque-limiting vibration damper with a double disc spring structure to stabilize torque, which optimizes the transmission of internal friction force of the torque-limiting vibration damper while reducing costs and improving material utilization, thereby accurately controlling the slipping torque.
[0004] The purpose of the utility model is achieved through the following technical scheme: this kind of torque-limiting vibration damper with a double disc spring structure for stabilizing torque includes an upper cover plate, an outer pressure disc spring, a lower pad, an inner pressure disc spring, a pressure plate, a friction plate and a main body. After the upper cover plate and the pressure plate are riveted, the friction plates on both sides of the main body are pressed between the lower pad and the pressure plate; the outer pressure disc spring is sleeved on the outside of the inner pressure disc spring to form a double disc spring structure, and the double disc spring structure is arranged between the upper cover plate and the lower pad, so that the double disc spring structure has two contact points with the lower pad.
[0005] As a further technical solution, the inner diameter of the outer pressure disc spring is equal to the outer diameter of the inner pressure disc spring, so that the inner ring of the outer pressure disc spring is in contact with and fits with the outer ring of the inner pressure disc spring.
[0006] As a further technical solution, the outer diameter D1 of the external pressure disc spring is 277 mm, the inner diameter of the external pressure disc spring / the outer diameter D2 of the internal pressure disc spring is 236 mm, and the inner diameter D3 of the internal pressure disc spring is 200 mm.
[0007] The beneficial effects of the utility model are:
[0008] 1. Compared with the traditional torque-limiting shock absorber, the utility model adopts a double disc spring structure, and adds an inner pressure disc spring with a small outer diameter on the inside of the existing disc spring structure. That is, another fulcrum is added, so that the pressure disc spring and the lower pad have two action fulcrums (contact points), the force is more uniform, the deformation and tilt of the lower pad are smaller, the eccentric wear of the friction plate is optimized, and the service life of the shock absorber is extended;
[0009] 2. According to the principle of mechanics, the inner side of the upper cover plate will deform upward, and the closer the action point is to the inner side, the greater the deformation. After adopting the double disc spring structure, the fulcrum of the new disc spring expands outward, making the deformation of the upper cover plate smaller. In addition, the change of axial space has a great influence on the force value of the disc spring. The double disc spring structure improves the fulcrum position and the deformation of the upper cover plate, making the output force value of the disc spring more stable;
[0010] 3. Since the pressure disc spring structure is circular, when the performance indicators are met, that is, when the clamping force is constant, the double disc spring structure adopted by the utility model has a thinner material thickness than the traditional structure disc spring, less overall material consumption, and less center waste, that is, material utilization is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the utility model.
[0012] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.
[0013] Figure 3 It is a schematic diagram of the assembly structure of the outer pressure disc spring and the inner pressure disc spring in the utility model.
[0014] Figure 4 for Figure 3 sectional view of .
[0015] Explanation of the reference numerals: upper cover plate 1, outer pressure disc spring 2, lower pad 3, inner pressure disc spring 4, pressure plate 5, friction plate 6, main body 7. DETAILED DESCRIPTION
[0016] The utility model will be described in detail below with reference to the accompanying drawings:
[0017] Example: As shown in the attached Figures 1 to 4 As shown, this kind of torque-limiting vibration damper with a double disc spring structure and stable torque includes an upper cover plate 1, an outer pressure disc spring 2, a lower pad 3, an inner pressure disc spring 4, a pressure plate 5, a friction plate 6 and a main body 7.
[0018] Reference Figure 1 , 2 After the upper cover plate 1 and the pressure plate 5 are riveted together, the friction plates 6 on both sides of the main body 7 are pressed tightly between the lower pad 3 and the pressure plate 5. Figure 3 ,4 As shown, the outer pressure disc spring 2 is sleeved outside the inner pressure disc spring 4 to form a double disc spring structure, and the double disc spring structure is arranged and pressed between the upper cover plate 1 and the lower pad 3 so that the double disc spring structure has two contact points with the lower pad 3.
[0019] Preferably, the inner diameter of the outer pressure disc spring 2 is equal to the outer diameter of the inner pressure disc spring 4, so that the inner ring of the outer pressure disc spring 2 is in contact with the outer ring of the inner pressure disc spring 4. The outer diameter D1 of the outer pressure disc spring 2 is 277 mm, the inner diameter of the outer pressure disc spring 2 / the outer diameter D2 of the inner pressure disc spring 4 is 236 mm, and the inner diameter D3 of the inner pressure disc spring 4 is 200 mm.
[0020] Comparing the conventional torque limiting damper with this embodiment, the specific parameters are as follows:
[0021] Traditional torque limiting damper: outer diameter Φ277mm, inner diameter Φ223mm, thickness 4.0mm, material utilization rate 26.67%;
[0022] In this embodiment, the outer diameter is Φ277 mm, the inner diameter is Φ200 mm, the thickness is 3.0 mm, and the material utilization rate is 36.26%.
[0023] Since the pressure disc spring structure is circular, when the performance indicators are met, that is, when the clamping force is constant, the material thickness of the traditional disc spring is definitely thicker than that of the double disc spring structure, more material is consumed, and there is more waste in the center, that is, the material utilization is low.
[0024] The working process of this utility model:
[0025] Compared with the traditional torque limiting shock absorber, the utility model adopts a double disc spring structure, and an inner pressure disc spring 4 with a small outer diameter is added to the inside of the existing disc spring structure. That is, another fulcrum is added, so that the pressure disc spring and the lower pad 3 have two action fulcrums (contact points), the force is more uniform, the deformation and inclination of the lower pad 3 are smaller, the eccentric wear of the friction plate 6 is optimized, and the service life of the shock absorber is extended.
[0026] According to the principles of mechanics, the inner side of the upper cover plate 1 will deform upward, and the closer the action point is to the inside, the greater the deformation. After adopting the double disc spring structure, the fulcrum of the new disc spring (the contact position with the upper cover plate 1) expands outward, making the upper cover plate 1 deform less. In addition, the change in axial space has a great influence on the force value of the disc spring. The double disc spring structure improves the fulcrum position and the deformation of the upper cover plate 1. Since the thickness of the double disc spring structure is reduced, the distance between the upper cover plate 1 and the lower pad 3 is reduced, making the output force value of the disc spring more stable.
[0027] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.
Claims
1. A torque-limiting vibration damper with a double disc spring structure and stable torque, characterized in that: It comprises an upper cover plate (1), an outer pressure disc spring (2), a lower pad (3), an inner pressure disc spring (4), a pressure plate (5), a friction plate (6) and a main body (7). After the upper cover plate (1) and the pressure plate (5) are riveted, the friction plates (6) on both sides of the main body (7) are pressed between the lower pad (3) and the pressure plate (5); the outer pressure disc spring (2) is sleeved outside the inner pressure disc spring (4) to form a double disc spring structure, and the double disc spring structure is arranged between the upper cover plate (1) and the lower pad (3) so that the double disc spring structure has two contact points with the lower pad (3).
2. A torque-limiting vibration damper with a double disc spring structure and stable torque according to claim 1, characterized in that: The inner diameter of the outer pressure disc spring (2) is equal to the outer diameter of the inner pressure disc spring (4), so that the inner ring of the outer pressure disc spring (2) and the outer ring of the inner pressure disc spring (4) are in contact and fit.
3. A torque-limiting vibration damper with a double disc spring structure and stable torque according to claim 2, characterized in that: The outer diameter D1 of the external pressure disc spring (2) is 277 mm, the inner diameter D2 of the external pressure disc spring (2) / the outer diameter D2 of the internal pressure disc spring (4) is 236 mm, and the inner diameter D3 of the internal pressure disc spring (4) is 200 mm.