A torsion-limiting damper assembly with a torque-adjustable diaphragm spring

Abstract

This invention discloses a torque-adjustable diaphragm spring-integrated torsion damper assembly, relating to the field of torsion dampers. It includes a damping disc, a driven disc, a disc hub I, and a disc hub II. One side of the driven disc faces the damping disc, and the other side is connected to the flywheel surface of the power end. Disc hub II is positioned with the inner hole of the driven disc via a positioning ring II. Disc hub I penetrates the damping disc, disc hub II, and driven disc, and is also positioned with the inner hole of the damping disc via the positioning ring I. The driven disc and the damping disc are riveted together with a support pin. This invention solves the problem of excessive radial space in existing torsion damper assemblies, as well as the problem of excessive instantaneous impact on the flywheel during power source switching or reverse-drive startup, leading to transmission system damage and unstable torque transmission.

Description

Technical Field

[0001] This invention relates to the field of torsion dampers, and more specifically to a torsion damper assembly with a built-in diaphragm spring and adjustable torque. Background Technology

[0002] With the rapid development of the automotive industry, pure electric vehicles and hybrid vehicles are gradually becoming mainstream models. Torque-limiting dampers are an important component in this field. They not only dampen torsional vibrations and reduce noise, but also protect the transmission system from overload damage when the torque exceeds a set value. Conventional torque-limiting dampers transmit engine torque through internal disc springs, friction plates, and splined hubs. When the torque is overloaded, the friction surfaces slip to prevent damage to the transmission system. This structure occupies a large radial space, which greatly limits installation. Furthermore, during power source switching or reverse-drive starts, the instantaneous impact on the flywheel is excessive. The friction plates generate a large amount of heat by slipping to reduce the overload torque impact, leading to unstable output torque of the torque-limiting damper. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a torque-adjustable diaphragm spring-embedded torsion damper assembly, which solves the problem of excessive radial space in existing torsion damper assemblies, as well as the problem of excessive instantaneous impact on the flywheel during power source switching or reverse start-up, leading to damage to the transmission system and unstable torque transmission.

[0004] The objective of this invention is achieved through the following technical solution: This diaphragm spring-embedded torque-adjustable damper assembly includes a damping disc, a driven disc, a disc hub I, and a disc hub II. One side of the driven disc faces the damping disc, and the other side of the driven disc is connected to the flywheel surface of the power end. The disc hub II is positioned with the inner hole of the driven disc by a positioning ring II. The disc hub I passes through the damping disc, the disc hub II, and the driven disc, and the disc hub I is positioned with the inner hole of the damping disc by the positioning ring I. The driven disc and the damping disc are riveted together by a support pin.

[0005] Several damping disc spring windows are opened along the circumference of the damping disc. Hub II spring windows are opened along the circumference of the hub II, corresponding to the damping disc spring windows. Driven disc spring windows are opened along the circumference of the driven disc, corresponding to the hub II spring windows. The damping disc spring windows, driven disc spring windows, and hub II spring windows all include first spring windows and second spring windows that are staggered. Spring I is installed inside the first spring window, and spring II is embedded in spring I. Spring III is installed inside the second spring window.

[0006] A flange is provided on the outer periphery of hub I. A groove for hub I is provided on the end face of the flange facing hub II. A groove for hub II is provided on hub II at a position corresponding to the groove for hub I. Hub I and hub II are kept in constant contact through the groove-groove fit.

[0007] A diaphragm spring is installed between the flange on the side away from the hub II and the positioning ring I, and the diaphragm spring is in a constant force state. When the hub I and hub II move relative to each other, the height of the diaphragm spring changes accordingly.

[0008] As a further technical solution, both the inner and outer circumferences of the diaphragm spring are processed with rounded corners. The inner circumference of the diaphragm spring is fitted with a clearance and positioned on the circumference inside the groove of the disc hub I. The inner hole of the positioning ring I is positioned on the circumference inside the groove of the disc hub I. Several limiting buckles and positioning protrusions are staggered on the circumference of the positioning ring I facing the damping disk. Opening slots are opened on the damping disk to correspond one-to-one with the limiting buckles and positioning protrusions, so as to realize the slot-type fit.

[0009] As a further technical solution, the inner side of the groove of hub I is in contact with the inner hole of hub II, i.e., the inner side of the groove of hub II, and the outer circumference of the flange, i.e., the outer side of the groove of hub I, is in contact with the outer side of the groove of hub II, to ensure the concentricity of hub I and hub II.

[0010] As a further technical solution, both spring I and spring II are interference-fitted with the spring window of disc hub II, and are clearance-fitted with the spring window of damping disc and the spring window of driven disc; spring III is interference-fitted with the spring window of disc hub II, and is clearance-fitted with the spring window of damping disc and the spring window of driven disc.

[0011] As a further technical solution, when the driven disc drives the damping disc to rotate, the two first compress spring I and spring II through the first spring window on the spring window of disc hub II, forming a first-level damping. When the torsion angle continues to increase, the two then compress spring III through the second spring window on the spring window of disc hub II, forming a second-level damping.

[0012] As a further technical solution, a limiting groove is opened between each group of adjacent first spring windows and second spring windows on hub II, and the support pin corresponds to the limiting groove and passes through it. When the power source is switched or when reverse start occurs, the instantaneous impact of the flywheel is too large, causing springs I, II, and III to reach the maximum design compression state. The support pin contacts the limiting groove, and the driven plate starts to drive hub II, causing the grooves of hub I and hub II to rotate relative to each other. The diaphragm spring is compressed until the convex groove in hub I contacts the convex groove in hub II and slips, so that the instantaneous impact torque gradually decreases to the torque limiting torque designed by the torque limiting damper assembly.

[0013] As a further technical solution, the diaphragm spring is made of 50CrV4 spring steel, and the total forming height H and the material thickness T satisfy H / T= .

[0014] As a further technical solution, the design torque limiting torque of the torque limiting damper assembly can be adjusted by adjusting the mating depth of the grooves of hub I and hub II or the angle of the groove slope; at the same time, the design torque limiting torque of the torque limiting damper assembly can be linearly adjusted by adjusting the thickness T of the diaphragm spring.

[0015] As a further technical solution, the opening of the limiting groove adopts a Bezier curve design to achieve a smooth transition.

[0016] As a further technical solution, a washer is provided on the side of the flange away from the hub II to contact the diaphragm spring, and the positioning ring I, the washer and the positioning ring II are all made of PA66 material.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The diaphragm spring is built into the torsion damper, and only the driven plate mounting hole is left at the connection with the flywheel surface, which greatly reduces the radial space dimension of the torsion damper assembly and improves the versatility of the torsion damper assembly.

[0019] 2. The grooves of hub I and hub II are in constant contact. When over-torque occurs, the grooves of hub I and hub II rotate relative to each other. The diaphragm spring is compressed until the grooves of hub I and hub II come into contact and slip. The torque gradually decreases to the torque limit torque designed for the torque limit damper assembly. This achieves both torque limit torque transmission and vibration reduction.

[0020] 3. The torque limiting capacity of the assembly can be adjusted by adjusting the depth of the grooves between hub I and hub II or the angle of the groove slope. The parts are highly interchangeable. At the same time, adjusting the thickness of the diaphragm spring can linearly adjust the torque limiting capacity of the assembly, and the torque limiting performance of the assembly can be controlled more precisely.

[0021] 4. The vibration damping disc, positioning ring I, positioning ring II, disc hub I, disc hub II, diaphragm spring, washer, etc. have positioning and limiting designs, which can ensure the stability and reliability of the assembly during use, while facilitating assembly installation and improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0023] Figure 2 for Figure 1 PP sectional view.

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 4 This is a schematic diagram of the diaphragm spring in this invention.

[0026] Figure 5 for Figure 4 AA sectional view.

[0027] Figure 6 This is a schematic diagram of the positioning ring I in this invention.

[0028] Figure 7 for Figure 6 CC section view.

[0029] Figure 8 This is a schematic diagram of the structure of hub II in this invention.

[0030] Figure 9 for Figure 8 BB cross-sectional view.

[0031] Figure 10 This is a schematic diagram of the structure of hub I in this invention.

[0032] Figure 11 This is a schematic diagram of the mating structure of hub I and hub II in this invention.

[0033] Figure 12 This is a schematic diagram of the structure during the first-stage vibration reduction operation of the present invention.

[0034] Figure 13 This is a schematic diagram of the structure during the operation of the secondary vibration reduction system in this invention.

[0035] Figure 14 This is a schematic diagram of the structure during the operation of the three-stage vibration reduction system in this invention.

[0036] Explanation of reference numerals in the attached drawings: 1. Damping disc; 2. Spring I; 3. Spring II; 4. Diaphragm spring; 5. Positioning ring I; 6. Washer; 7. Support pin; 8. Driven disc; 9. Positioning ring II; 10. Disc hub I; 11. Disc hub II; 12. Spring III; 13. Bolt hole; 14. Damping disc spring window; 15. Driven disc spring window; 16. Disc hub II spring window; 17. Limiting groove; 18. Disc hub I groove; 19. Disc hub II groove; 20. Diaphragm spring inner circumference; 21. Diaphragm spring outer circumference; 22. Disc hub II groove inner side; 23. Disc hub II groove outer side; 24. Disc hub I groove outer side; 25. Disc hub I groove inner side; 26. Limiting buckle; 27. Positioning ring I inner hole; 28. Positioning protrusion; 29. ​​Opening groove. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings:

[0038] Example: As shown in the attached figure, this diaphragm spring-embedded torque-adjustable damper assembly includes a damping disc 1, spring I 2, spring II 3, diaphragm spring 4, positioning ring I 5, washer 6, support pin 7, driven disc 8, positioning ring II 9, disc hub I 10, disc hub II 11, spring III 12, bolt hole 13, damping disc spring window 14, driven disc spring window 15, disc hub II spring window 16, limiting groove 17, disc hub I groove 18, disc hub II groove 19, inner circumference of diaphragm spring 20, outer circumference of diaphragm spring 21, inner side of disc hub II groove 22, outer side of disc hub II groove 23, outer side of disc hub I groove 24, inner side of disc hub I groove 25, limiting buckle 26, inner hole of positioning ring I 27, positioning protrusion 28, and opening groove 29.

[0039] Reference Appendix Figure 1 , 2 3. The inner side of the driven plate 8 faces the damping plate 1, and several bolt holes 13 are opened along the circumference of the driven plate 8 so that the outer side of the driven plate 8 can be connected and fixed to the flywheel surface of the power end. The hub II 11 is positioned with the inner hole of the driven plate 8 by the positioning ring II 9. The hub I 10 passes through the damping plate 1, the hub II 11 and the driven plate 8 in sequence, and the hub I 10 is positioned with the inner hole of the damping plate 1 by the positioning ring I 5. The driven plate 8 and the damping plate 1 are fixed by the support pin 7 by upsetting riveting.

[0040] Furthermore, eight damping disc spring windows 14 are opened along the circumference of the damping disc 1, eight hub II spring windows 16 are opened along the circumference of the hub II 11 corresponding to the damping disc spring windows 14, and eight driven disc spring windows 15 are opened along the circumference of the driven disc 8 corresponding to the hub II spring windows 16. The damping disc spring windows 14, driven disc spring windows 15 and hub II spring windows 16 each include four first spring windows and four second spring windows that are staggered. Spring I2 is installed inside the first spring window, and spring II 3 is embedded in spring I2. Spring III 12 is installed inside the second spring window.

[0041] like Figure 10 , 11 As shown, a flange is provided on the outer periphery of hub I 10. A hub I groove 18 (including six sets of grooves) is provided on the end face of the flange facing hub II 11. A hub II groove 19 (also including six sets of grooves, matching the hub I groove 18) is provided on hub II 11 at a corresponding position. Hub I 10 and hub II 11 maintain constant contact through the groove-groove fit. Further, as... Figure 2 , 4As shown in Figure 5, a diaphragm spring 4 is installed between the flange side away from the hub II11 and the locating ring I5, and the diaphragm spring 4 is under constant force. When the hub I10 and the hub II11 move relative to each other, the height of the diaphragm spring 4 changes accordingly. Preferably, the diaphragm spring 4 is made of 50CrV4 spring steel, and the total formed height H and the material thickness T satisfy H / T = .like Figure 2 , 11 As shown, the inner side 25 of the groove of hub I is in contact with the inner hole of hub II 11, i.e., the inner side 22 of the groove of hub II, and the outer circumference of the flange, i.e., the outer side 24 of the groove of hub I, is in contact with the outer side 23 of the groove of hub II, to ensure the concentricity of hub I 10 and hub II 11.

[0042] Furthermore, both the inner circumference 20 and the outer circumference 21 of the diaphragm spring are processed with rounded corners. The inner circumference 20 of the diaphragm spring is clearance-fitted and positioned on the circumference of the inner side 25 of the groove in the hub I; the inner hole 27 of the positioning ring I is positioned on the circumference of the inner side 25 of the groove in the hub I. (See attached diagram) Figure 3 , 6 7. Four limiting buckles 26 and four positioning protrusions 28 are staggered on the circumference of the positioning ring I5 facing the vibration damping plate 1. Opening slots 29 are opened on the vibration damping plate 1 to correspond one-to-one with the limiting buckles 26 and positioning protrusions 28, so as to realize the slot-type fit.

[0043] Springs I2 and II3 are both interference-fitted with spring window 16 of hub II, and are clearance-fitted with spring window 14 of damping disc and spring window 15 of driven disc. Spring III12 is interference-fitted with spring window 16 of hub II, and is clearance-fitted with spring window 14 of damping disc and spring window 15 of driven disc. The different positions of springs I2, II3, and III12 in spring window 16 of hub II result in different working states of the springs, thus forming a two-stage damping system for the torque-adjustable diaphragm spring-embedded torque-limiting damper assembly. Furthermore, when driven disc 8 drives damping disc 1 to rotate, springs I2 and II3 are first compressed through the first spring window on spring window 16 of hub II, forming a first-stage damping. As the torsion angle continues to increase, spring III12 is also compressed through the second spring window on spring window 16 of hub II, forming a second-stage damping.

[0044] like Figure 8 , 11As shown, a first spring window and a second spring window adjacent to each other on the hub II 11 are grouped together. A limiting groove 17 (four in total) is opened between each group of windows, and the support pin 7 corresponds to the limiting groove 17 one by one and passes through it. When the power source is switched or when reverse start occurs, the instantaneous impact of the flywheel is too large, causing spring I 2, spring II 3, and spring III 12 to reach the maximum design compression state. The support pin 7 contacts the limiting groove 17, and the driven plate 8 starts to drive the hub II 11, so that the concave and convex groove 18 of hub I and the concave and convex groove 19 of hub II rotate relative to each other. The diaphragm spring 4 is compressed until the convex groove in the concave and convex groove 18 of hub I contacts the convex groove in the concave and convex groove 19 of hub II and slips. This causes the instantaneous impact torque to gradually decrease to the torque limiting torque designed for the torque limiting damper assembly.

[0045] Preferably, the design torque limiting torque of the torque limiting damper assembly is adjusted by adjusting the mating depth of the groove 18 of hub I and the groove 19 of hub II, or by adjusting the slope angle of the grooves; simultaneously, the design torque limiting torque of the torque limiting damper assembly is linearly adjusted by adjusting the thickness T of the diaphragm spring 4. The opening of the limiting groove 17 adopts a Bezier curve design to achieve a smooth transition.

[0046] Preferably, a washer 6 is provided on the side of the flange away from the hub II11 to contact the diaphragm spring 4, and the positioning ring I5, washer 6 and positioning ring II9 are all made of PA66 material.

[0047] The working process of this invention:

[0048] The installation method of this invention is the same as that of conventional torque limiting dampers. It is connected to the flywheel of the power source by bolts through the bolt holes 13 reserved in the driven plate 8, and the torque is output through the internal spline in the middle of the disc hub I 10.

[0049] The flywheel drives the driven disc 8 of the damper to rotate counterclockwise, transmitting torque to the fixedly riveted driven disc 8 and damping disc 1. As the torsion angle increases, the spring windows (driven disc spring window 15, damping disc spring window 14) on one side of the driven disc 8 and damping disc 1 compress the concentric springs II 3 and I 2 on one side of the disc hub II spring window 16, as shown. Figure 12 As shown, the first stage of vibration damping of the shock absorber is working at this time.

[0050] When the torsion angle reaches the preset angle, spring III 12, compressed by the driven disc spring window 15 and the damping disc spring window 14, begins to touch one side of the compression disc hub II spring window 16, as... Figure 13 As shown, at this time, springs II3, I2, and III12 are compressed together, and the secondary vibration damping of the shock absorber is working.

[0051] As the torsion angle continues to increase, the limiting groove 17 begins to touch the support pin 7, springs II 3, I 2, and III 12 stop compressing, the concave and convex grooves 18 of disc I and II rotate relative to each other, the diaphragm spring 4 is compressed under force, the three-stage vibration damping of the shock absorber works, and the torque of the power source is transmitted at the same time.

[0052] When switching power sources or during reverse start-up, the instantaneous impact on the flywheel is too large. The groove 18 of disc hub I and the groove 19 of disc hub II continue to rotate relative to each other until the groove in groove 18 of disc hub I contacts the groove in groove 19 of disc hub II and slips. The torque of the instantaneous impact gradually decreases as the groove slips and misaligns to the torque limiting torque designed for the torque limiting damper assembly. At this time, the damper achieves the torque limiting and vibration damping function.

[0053] The torque limiting capacity of the assembly can be adjusted by adjusting the depth of the grooves or the slope angle of the grooves of hub I10 and hub II11. The torque limiting capacity of the assembly can be adjusted linearly by adjusting the thickness of the diaphragm spring 4. At the same time, the influence of external ambient temperature on hub I10, hub II11, and diaphragm spring 4 is limited. Therefore, as long as the depth of the grooves of hub I10 and hub II11, the slope angle of the grooves, and the thickness of the diaphragm spring 4 are controlled, the torque can be precisely controlled and output.

[0054] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this invention should fall within the scope of protection of the appended claims.

Claims

1. A torque-adjustable torsional damping assembly with a built-in diaphragm spring, characterized in that: It includes a damping disc (1), a driven disc (8), a disc hub I (10) and a disc hub II (11). One side of the driven disc (8) faces the damping disc (1), and the other side of the driven disc (8) is connected to the flywheel surface of the power end. The disc hub II (11) is positioned with the inner hole of the driven disc (8) by the positioning ring II (9). The disc hub I (10) passes through the damping disc (1), the disc hub II (11) and the driven disc (8), and the disc hub I (10) is positioned with the inner hole of the damping disc (1) by the positioning ring I (5). The driven disc (8) and the damping disc (1) are riveted together by the support pin (7). Several damping disc spring windows (14) are opened along the circumference of the damping disc (1). A hub II spring window (16) is opened along the circumference of the hub II (11) in a one-to-one correspondence with the damping disc spring window (14). A driven disc spring window (15) is opened along the circumference of the driven disc (8) in a one-to-one correspondence with the hub II spring window (16). The damping disc spring window (14), the driven disc spring window (15) and the hub II spring window (16) all include a first spring window and a second spring window that are staggered. Spring I (2) is installed inside the first spring window. Spring II (3) is installed inside spring I (2). Spring III (12) is installed inside the second spring window. A flange is provided on the outer periphery of hub I (10), and a groove (18) of hub I is provided on the end face of the flange facing hub II (11). A groove (19) of hub II is provided on hub II (11) at a position corresponding to the groove (18) of hub I. Hub I (10) and hub II (11) are in constant contact through the groove and groove fit. A diaphragm spring (4) is installed between the flange on the side away from the hub II (11) and the positioning ring I (5), and the diaphragm spring (4) is under constant force. When the hub I (10) and the hub II (11) move relative to each other, the height of the diaphragm spring (4) changes accordingly. Take a first spring window and a second spring window on the hub II (11) as a group, and open a limiting groove (17) between each group of windows. The support pin (7) corresponds to the limiting groove (17) and passes through it. When the power source is switched or when the reverse start is generated, the instantaneous impact of the flywheel is too large, causing spring I (2), spring II (3), and spring III (12) to reach the maximum design compression state. The support pin (7) contacts the limiting groove (17), and the driven plate (8) starts to drive the hub II (11), so that the concave and convex groove (18) of hub I and the concave and convex groove (19) of hub II rotate relative to each other. The diaphragm spring (4) is compressed until the convex groove in the concave and convex groove (18) of hub I contacts the convex groove in the concave and convex groove (19) of hub II and slips, so that the instantaneous impact torque gradually decreases to the torque limit torque designed by the torque limit damper assembly. The design torque limiting torque of the torque limiting damper assembly is adjusted by adjusting the mating depth of the groove (18) of hub I and the groove (19) of hub II or the angle of the groove slope; at the same time, the design torque limiting torque of the torque limiting damper assembly is linearly adjusted by adjusting the thickness T of the diaphragm spring (4).

2. The diaphragm spring-embedded torque-adjustable damping assembly according to claim 1, characterized in that: Both the inner circumference (20) and the outer circumference (21) of the diaphragm spring are processed by rounded corner shaping. The inner circumference (20) of the diaphragm spring is fitted with clearance and positioned on the circumference of the inner side (25) of the groove of the disc hub I. The inner hole (27) of the positioning ring I is positioned on the circumference of the inner side (25) of the groove of the disc hub I. Several limiting buckles (26) and positioning protrusions (28) are staggered on the circumference of the positioning ring I (5) facing the damping disk (1). The damping disk (1) has opening slots (29) that correspond one-to-one with the limiting buckles (26) and positioning protrusions (28) to achieve a slot-type fit.

3. The diaphragm spring-embedded torque-adjustable torque damper assembly according to claim 2, characterized in that: The inner side (25) of the groove of hub I is in contact with the inner hole of hub II (11), i.e., the inner side (22) of the groove of hub II. The outer circumference of the flange, i.e., the outer side (24) of the groove of hub I, is in contact with the outer side (23) of the groove of hub II, to ensure the concentricity of hub I (10) and hub II (11).

4. The diaphragm spring-embedded torque-adjustable damping assembly according to claim 1, characterized in that: Both spring I (2) and spring II (3) are interference-fitted with the spring window (16) of disc hub II, and are clearance-fitted with the spring window (14) of damping disc and the spring window (15) of driven disc; spring III (12) is interference-fitted with the spring window (16) of disc hub II, and is clearance-fitted with the spring window (14) of damping disc and the spring window (15) of driven disc.

5. The diaphragm spring-embedded torque-adjustable torque damper assembly according to claim 4, characterized in that: When the driven disk (8) drives the damping disk (1) to rotate, the two first compress the spring I (2) and spring II (3) through the first spring window on the spring window (16) of the disk hub II, forming a first-level damping. When the torsion angle continues to increase, the two then compress the spring III (12) through the second spring window on the spring window (16) of the disk hub II, forming a second-level damping.

6. The diaphragm spring-embedded torque-adjustable torque damper assembly according to claim 5, characterized in that: The diaphragm spring (4) is made of 50CrV4 spring steel, and the total forming height H and the material thickness T satisfy H / T = .

7. The diaphragm spring-embedded torque-adjustable torque damper assembly according to claim 1, characterized in that: The opening of the limiting groove (17) adopts a Bezier curve design to achieve a smooth transition.

8. The diaphragm spring-embedded torque-adjustable damping assembly according to claim 1, characterized in that: The flange is provided with a washer (6) on the side away from the hub II (11) and in contact with the diaphragm spring (4). The positioning ring I (5), washer (6) and positioning ring II (9) are all made of PA66 material.

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