Torque-limiting shock absorber assembly with built-in diaphragm spring and adjustable torque

Abstract

The invention discloses a diaphragm spring built-in torque-adjustable torque-limiting shock absorber assembly, and relates to the field of torque-limiting shock absorbers, the diaphragm spring built-in torque-limiting shock absorber assembly comprises a shock absorption disc, a driven disc, a disc hub I and a disc hub II, one side of the driven disc faces the shock absorption disc, the other side of the driven disc is connected with a power end flywheel surface, the disc hub II is positioned with an inner hole of the driven disc through a positioning ring II, and the disc hub II is connected with a power end flywheel surface. The disc hub I penetrates through the vibration reduction disc, the disc hub II and the driven disc, the disc hub I and an inner hole of the vibration reduction disc are positioned through a positioning ring I, and the driven disc and the vibration reduction disc are riveted and fixed through a supporting pin. The problem that the radial space of an existing limited torsion damper assembly is too large is solved, and the problems that a transmission system is damaged and torque transmission is unstable due to the fact that instant impact of a flywheel is too large when a power source is switched or reverse support starting is generated are solved.

Description

Technical Field

[0001] The invention relates to the field of torque limiting vibration dampers, and in particular to a torque limiting vibration damper assembly with a built-in diaphragm spring and adjustable torque. Background Art

[0002] With the rapid development of the automobile industry, pure electric vehicles and hybrid vehicles have gradually become mainstream models. Torque limiter is one of the important components. It can not only attenuate torsional vibration and reduce noise, but also play a protective role when the torque exceeds the set value to prevent the transmission system from overload damage. Conventional torque limiter transmits engine torque through internal disc springs, friction plates, spline hubs, etc. When the torque is overloaded, the friction surfaces slip to prevent the transmission system from overload damage. This structure occupies a large radial space and has great installation limitations. At the same time, when the power source is switched or when the back-up start occurs, the instantaneous impact of the flywheel is too large. The friction plate reduces the overload torque impact through sliding and wear, which will generate a lot of heat energy, resulting in unstable output torque of the torque limiter. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a torque-adjustable torque-limited damper assembly with a built-in diaphragm spring, so as to solve the problem of excessive radial space of the existing torque-limited damper assembly, as well as the problem of excessive instantaneous impact of the flywheel when the power source is switched or when back-up starting occurs, resulting in damage to the transmission system and unstable torque transmission.

[0004] The object of the present invention is achieved through the following technical solution: the torque-adjustable torque-limiting damper assembly with built-in diaphragm spring comprises a damping plate, a driven plate, a disc hub I and a disc hub II, one side of the driven plate faces the damping plate, the other side of the driven plate is connected to the flywheel surface of the power end, the disc hub II is positioned by a positioning ring II and an inner hole of the driven plate, the disc hub I penetrates the damping plate, the disc hub II and the driven plate, and the disc hub I is positioned by a positioning ring I and an inner hole of the damping plate, and the driven plate and the damping plate are fixed by riveting by a supporting pin;

[0005] A plurality of damping disc spring windows are provided along the circumferential direction of the damping disc, a disc hub II spring window is provided along the circumferential direction of the disc hub II and corresponds to the damping disc spring window one by one, a driven disc spring window is provided along the circumferential direction of the driven disc and corresponds to the disc hub II spring window one by one, the damping disc spring window, the driven disc spring window and the disc hub II spring window all include a first spring window and a second spring window which are staggered, wherein a spring I is placed in the first spring window, a spring II is embedded and installed in the spring I, and a spring III is placed in the second spring window;

[0006] A flange is arranged on the outer periphery of the disk hub I, and a concave-convex groove of the disk hub I is arranged on the end surface of the flange facing the disk hub II, and a concave-convex groove of the disk hub II is arranged at a position on the disk hub II corresponding to the concave-convex groove of the disk hub I, and the disk hub I and the disk hub II are kept in a constant contact state through the concave-convex fit;

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

[0008] As a further technical solution, the inner circumference of the diaphragm spring and the outer circumference of the diaphragm spring are both processed by a rounding shaping process, and the inner circumference clearance of the diaphragm spring is matched and positioned on the circumference inside the concave-convex groove of the disk hub I; the inner hole of the positioning ring I is positioned on the circumference inside the concave-convex groove of the disk hub I, and a number of limit buckles and positioning protrusions are alternately distributed on the circumference of the positioning ring I facing the vibration damping disk side, and open grooves are opened on the vibration damping disk corresponding to the limit buckles and positioning protrusions one by one to achieve slot-type matching.

[0009] As a further technical solution, the inner side of the concave-convex groove of disk hub I contacts and is positioned with the inner hole of disk hub II, i.e., the inner side of the concave-convex groove of disk hub II, and the outer circumference of the flange, i.e., the outer side of the concave-convex groove of disk hub I contacts and is positioned with the outer side of the concave-convex groove of disk hub II, thereby ensuring the concentricity of disk hub I and disk hub II.

[0010] As a further technical solution, both spring I and spring II have an interference fit with the spring window of the disk hub II, and both have a clearance fit with the spring window of the damping disk and the spring window of the driven disk; spring III has an interference fit with the spring window of the disk hub II, and spring III has a clearance fit with the spring window of the damping disk and the spring window of the driven disk.

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

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

[0013] As a further technical solution, the diaphragm spring is made of 50CrV4 spring steel, and the overall forming height H and material thickness T meet

[0014] As a further technical solution, the designed torque limiting torque of the torque limiting vibration damper assembly is adjusted by adjusting the matching depth or the inclined angle of the concave-convex groove of the disc hub I and the concave-convex groove of the disc hub II; at the same time, the designed torque limiting torque of the torque limiting vibration damper assembly is linearly adjusted by adjusting the thickness T of the diaphragm spring.

[0015] As a further technical solution, the opening of the limit groove is designed with a Bezier curve to achieve a smooth transition.

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

[0017] The beneficial effects of the present invention are:

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

[0019] 2. The concave-convex groove of disc hub I and the concave-convex groove of disc hub II are in constant contact. When over-torque occurs, the concave-convex groove of disc hub I and the concave-convex groove of disc hub II rotate relative to each other, and the diaphragm spring is compressed by force until the convex groove of disc hub I and the convex groove of disc hub II contact and slip, and the torque gradually decreases to the limited torque designed by the torque-limiting shock absorber assembly, so that the limited torque can be transmitted and vibration can be reduced at the same time;

[0020] 3. The torque limiting capacity of the assembly can be adjusted by adjusting the depth or angle of the concave and convex grooves of the hub I and hub II, and the parts are highly versatile; at the same time, the torque limiting capacity of the assembly can be adjusted in a linear manner by adjusting the thickness of the diaphragm spring, and the torque limiting performance of the assembly can be controlled more accurately;

[0021] 4. The vibration damping plate, 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, facilitate the installation of the assembly, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the diaphragm spring in the present invention.

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

[0027] Figure 6 It is a schematic diagram of the structure of the positioning ring I in the present invention.

[0028] Figure 7 for Figure 6 CC cross-sectional view.

[0029] Figure 8 It is a schematic diagram of the structure of the disk hub II in the present invention.

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

[0031] Fig.10 It is a schematic diagram of the structure of the disk hub I in the present invention.

[0032] Fig.11 It is a schematic diagram of the matching structure of disk hub I and disk hub II in the present invention.

[0033] Fig.12 It is a schematic diagram of the structure of the first-level vibration reduction operation in the present invention.

[0034] Fig.13 It is a schematic diagram of the structure of the present invention during the second-stage vibration reduction operation.

[0035] Fig.14 It is a schematic diagram of the structure of the present invention during three-stage vibration reduction operation.

[0036] Explanation of the accompanying drawings: 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 concave-convex groove 18, disc hub II concave-convex groove 19, diaphragm spring inner circumference 20, diaphragm spring outer circumference 21, inner side of disc hub II concave-convex groove 22, outer side of disc hub II concave-convex groove 23, outer side of disc hub I concave-convex groove 24, inner side of disc hub I concave-convex groove 25, limiting buckle 26, inner hole 27 of positioning ring I, positioning protrusion 28, opening groove 29. DETAILED DESCRIPTION

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

[0038] Embodiment: As shown in the accompanying drawings, this diaphragm spring built-in torque-adjustable torque-limited vibration damper assembly includes a vibration damping plate 1, a spring I2, a spring II3, a diaphragm spring 4, a positioning ring I5, a washer 6, a support pin 7, a driven plate 8, a positioning ring II9, a disc hub I10, a disc hub II11, a spring III12, a bolt hole 13, a vibration damping plate spring window 14, a driven plate spring window 15, a disc hub II spring window 16, a limiting groove 17, a disc hub I concave-convex groove 18, a disc hub II concave-convex groove 19, an inner circumference of a diaphragm spring 20, an outer circumference of a diaphragm spring 21, an inner side 22 of a disc hub II concave-convex groove, an outer side 23 of a disc hub II concave-convex groove, an outer side 24 of a disc hub I concave-convex groove, an inner side 25 of a disc hub I concave-convex groove, a limiting buckle 26, an inner hole 27 of a positioning ring I, a positioning protrusion 28 and an opening groove 29.

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

[0040] Furthermore, eight damping disc spring windows 14 are opened along the circumferential direction of the damping disc 1, eight disc hub II spring windows 16 are opened along the circumferential direction of the disc hub II 11 corresponding to the damping disc spring windows 14, and eight driven disc spring windows 15 are opened along the circumferential direction of the driven disc 8 corresponding to the disc hub II spring windows 16. The damping disc spring windows 14, the driven disc spring windows 15 and the disc hub II spring windows 16 all include first spring windows (four in total) and second spring windows (four in total) that are staggered, wherein a spring I2 is inserted in the first spring window, a spring II3 is embedded in the spring I2, and a spring III 12 is inserted in the second spring window.

[0041] like Fig.10 , 11 As shown, a flange is arranged on the outer periphery of the hub I 10, and a hub I concave-convex groove 18 (including six groups of concave-convex structures) is arranged on the end surface of the flange facing the hub II 11, and a hub II concave-convex groove 19 (also including six groups of concave-convex structures, and matching the hub I concave-convex groove 18) is arranged on the hub II 11 at a position corresponding to the hub I concave-convex groove 18, and the hub I 10 and the hub II 11 are kept in a constant contact state through the concave-convex fit. Further, as Figure 2 , 4As shown in Figure 5, a diaphragm spring 4 is installed between the side of the flange away from the hub II 11 and the positioning ring I5, and the diaphragm spring 4 is in a constant force state. When the hub I 10 and the hub II 11 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 molding height H and the material thickness T meet like Figure 2 , 11 As shown, the inner side 25 of the concave-convex groove of disk hub I contacts and positions with the inner hole of disk hub II 11, i.e. the inner side 22 of the concave-convex groove of disk hub II, and the outer circumference of the flange, i.e. the outer side 24 of the concave-convex groove of disk hub I contacts and positions with the outer side 23 of the concave-convex groove of disk hub II, thereby ensuring the concentricity of disk hub I 10 and disk hub II 11.

[0042] Furthermore, the inner circumference 20 of the diaphragm spring and the outer circumference 21 of the diaphragm spring are both processed by the fillet shaping process, and the inner circumference 20 of the diaphragm spring is clearance-matched and positioned on the circumference of the inner side 25 of the concave-convex groove of the disk hub I; the inner hole 27 of the positioning ring I is positioned on the circumference of the inner side 25 of the concave-convex groove of the disk hub I, refer to the attached Figure 3 , 6 7. Four limit buckles 26 and four positioning protrusions 28 are alternately distributed on the circumference of the positioning ring I5 facing the vibration damping plate 1. Open grooves 29 corresponding to the limit buckles 26 and the positioning protrusions 28 are provided on the vibration damping plate 1 to achieve a slot-type fit.

[0043] Both spring I2 and spring II3 are interference fit with the spring window 16 of the hub II, and both are clearance fit with the spring window 14 of the damping disc and the spring window 15 of the driven disc. Spring III12 is interference fit with the spring window 16 of the hub II, and spring III12 is clearance fit with the spring window 14 of the damping disc and the spring window 15 of the driven disc. The different positions of spring I2, spring II3 and spring III12 in the spring window 16 of the hub II make the working states of the springs different, thereby forming a two-stage vibration reduction of the torque-adjustable torque-limiting vibration damper assembly with built-in diaphragm spring. Further, when the driven disc 8 drives the damping disc 1 to rotate, the two first pass through the first spring window on the spring window 16 of the hub II to compress spring I2 and spring II3, forming a primary vibration reduction. When the torsion angle continues to increase, the two pass through the second spring window on the spring window 16 of the hub II to compress spring III12, forming a secondary vibration reduction.

[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 formed into a group, and a limit slot 17 (four in total) is provided between each group of windows, and the support pin 7 corresponds to the limit slot 17 one by one and passes through it. When the power source is switched or when the back-up start occurs, the instantaneous impact of the flywheel is too large, causing the spring I2, spring II3, and spring III 12 to reach the maximum designed compression state, the support pin 7 contacts the limit slot 17, and the driven disc 8 starts to drive the hub II 11, so that the concave-convex groove 18 of the hub I and the concave-convex groove 19 of the hub II rotate relative to each other, and the diaphragm spring 4 is compressed by force until the convex groove in the concave-convex groove 18 of the hub I contacts the convex groove in the concave-convex groove 19 of the hub II and slips, so that the torque of the instantaneous impact gradually decreases to the designed torque limit of the torque-limiting damper assembly.

[0045] Preferably, the designed torque limiting torque of the torque limiting damper assembly is adjusted by adjusting the matching depth or the angle of the inclined surface of the concave-convex groove 18 of the disc hub I and the concave-convex groove 19 of the disc hub II; at the same time, the designed 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 limit groove 17 adopts a Bezier curve design to achieve a smooth transition.

[0046] Preferably, a gasket 6 is provided on the side of the flange facing away from the hub II 11 to contact the diaphragm spring 4, and the positioning ring I5, the gasket 6 and the positioning ring II9 are all made of PA66 material.

[0047] Working process of the present invention:

[0048] The installation method of the present invention is the same as that of a conventional torque limiting shock absorber. The driven disc 8 is connected to the flywheel of the power source by bolts through the bolt holes 13 reserved in the driven disc 8, and the torque is output through the internal splines in the middle of the disc hub Ⅰ10.

[0049] The flywheel drives the driven plate 8 of the shock absorber to rotate counterclockwise to transmit the torque to the fixed riveted driven plate 8 and the shock absorber plate 1. As the torsion angle increases, the spring windows (driven plate spring window 15, shock absorber spring window 14) of the driven plate 8 and the shock absorber plate 1 compress the concentric springs Ⅱ3 and Ⅰ2 on one side of the spring window 16 of the hub Ⅱ, as shown in FIG. Fig.12 As shown, at this time, the first-level vibration reduction of the shock absorber works.

[0050] When the torsion angle reaches the preset angle, the spring III 12 is squeezed through the driven disc spring window 15 and the damping disc spring window 14 and begins to touch the side of the compression disc hub II spring window 16. Fig.13 As shown, at this time, spring II3, spring I2, and spring III12 are compressed together, and the shock absorber works at the second level of vibration reduction.

[0051] As the torsion angle continues to increase, the limit groove 17 begins to touch the support pin 7, the spring II3, spring I2, and spring III12 stop compressing, the disc hub I concave-convex groove 18 and the disc hub II concave-convex groove 19 rotate relative to each other, the diaphragm spring 4 is compressed by the force, the shock absorber works at the third level of vibration reduction, and at the same time transmits the torque of the power source.

[0052] When the power source is switched or back-up start occurs, the instantaneous impact of the flywheel is too large, and the disc hub I concave-convex groove 18 and the disc hub II concave-convex groove 19 continue to rotate relative to each other until the convex groove in the disc hub I concave-convex groove 18 contacts and slips with the convex groove in the disc hub II concave-convex groove 19. The torque of the instantaneous impact gradually decreases to the torque limit torque designed by the torque limiting shock absorber assembly as the convex groove slips and dislocates. At this time, the shock absorber realizes the torque limiting vibration reduction function.

[0053] The torque limiting capacity of the assembly can be adjusted by adjusting the depth of the concave-convex grooves of disk hub Ⅰ10 and disk hub Ⅱ11 or the angle of the concave-convex groove bevel. The torque limiting capacity of the assembly can be adjusted in a linear manner by adjusting the thickness of the diaphragm spring 4. At the same time, disk hub Ⅰ10, disk hub Ⅱ11 and diaphragm spring 4 are limitedly affected by the external ambient temperature. Therefore, precise control and output of torque can be achieved by controlling the depth of the concave-convex grooves of disk hub Ⅰ10 and disk hub Ⅱ11, the angle of the concave-convex groove bevel and the thickness of the diaphragm spring 4.

[0054] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A torque-adjustable torque-limited damper assembly with a built-in diaphragm spring, characterized in that: The invention comprises a damping disc (1), a driven disc (8), a disc hub I (10) and a disc hub II (11), wherein 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 at the power end, the disc hub II (11) is positioned by a positioning ring II (9) and the inner hole of the driven disc (8), 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 by a positioning ring I (5) and the inner hole of the damping disc (8), and the driven disc (8) and the damping disc (1) are fixed by riveting by a supporting pin (7); A plurality of damping disc spring windows (14) are provided along the circumferential direction of the damping disc (1), a disc hub II spring window (16) is provided along the circumferential direction of the disc hub II (11) and corresponds to the damping disc spring window (14), and a driven disc spring window (15) is provided along the circumferential direction of the driven disc (8) and corresponds to the disc hub II spring window (16), the damping disc spring window (14), the driven disc spring window (15) and the disc hub II spring window (16) all include a first spring window and a second spring window which are staggered, wherein a spring I (2) is inserted into the first spring window, a spring II (3) is embedded and installed in the spring I (2), and a spring III (12) is inserted into the second spring window; A flange is arranged on the outer periphery of the disk hub I (10), and a disk hub I concave-convex groove (18) is arranged on the end surface of the flange facing the disk hub II (11), and a disk hub II concave-convex groove (19) is arranged on the disk hub II (11) at a position corresponding to the disk hub I concave-convex groove (18), so that the disk hub I (10) and the disk hub II (11) are kept in a constant contact state through the concave-convex fit; A diaphragm spring (4) is installed between the side of the flange away from the disk hub II (11) and the positioning ring I (5), and the diaphragm spring (4) is in a constant force state. When the disk hub I (10) and the disk hub II (11) move relative to each other, the height of the diaphragm spring (4) changes accordingly.

2. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 1, characterized in that: The inner circumference (20) of the diaphragm spring and the outer circumference (21) of the diaphragm spring are both processed by a rounding shaping process. The inner circumference (20) of the diaphragm spring is clearance-matched and positioned on the circumference of the inner side (25) of the concave-convex groove of the disk hub I; the inner hole (27) of the positioning ring I is positioned on the circumference of the inner side (25) of the concave-convex groove of the disk hub I; a plurality of limit buckles (26) and positioning protrusions (28) are staggeredly distributed on the circumference of the positioning ring I (5) facing the vibration damping disk (1); and opening grooves (29) are provided on the vibration damping disk (1) in one-to-one correspondence with the limit buckles (26) and the positioning protrusions (28) to achieve a slot-type fit.

3. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 2, characterized in that: The inner side (25) of the concave-convex groove of the disk hub I contacts and positions with the inner hole of the disk hub II (11), i.e., the inner side (22) of the concave-convex groove of the disk hub II, and the outer circumference of the flange, i.e., the outer side (24) of the concave-convex groove of the disk hub I contacts and positions with the outer side (23) of the concave-convex groove of the disk hub II, thereby ensuring the concentricity of the disk hub I (10) and the disk hub II (11).

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

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

6. The torque-adjustable torque-limited vibration damper assembly with built-in diaphragm spring according to claim 5, characterized in that: A first spring window and a second spring window adjacent to each other on the hub II (11) form a group, a limiting groove (17) is provided between each group of windows, and the support pin (7) corresponds to the limiting groove (17) one by one and passes through the limiting groove; when the power source is switched or a back-up start is generated, the instantaneous impact of the flywheel is too large, causing the spring I (2), spring II (3), and spring III (12) to reach the maximum designed compression state, the support pin (7) contacts the limiting groove (17), and the driven disc (8) starts to drive the hub II (11), so that the concave-convex groove (18) of the hub I and the concave-convex groove (19) of the hub II rotate relative to each other, and the diaphragm spring (4) is compressed by force until the convex groove in the concave-convex groove (18) of the hub I contacts the convex groove in the concave-convex groove (19) of the hub II and slips, so that the torque of the instantaneous impact gradually decreases to the designed torque limit torque of the torque limit damper assembly.

7. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 6, characterized in that: The diaphragm spring (4) is made of 50CrV4 spring steel, and the overall molding height H and the material thickness T satisfy H / T=√2.

8. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 7, characterized in that: The designed torque limiting torque of the torque limiting vibration damper assembly is adjusted by adjusting the matching depth or the angle of the inclined surface of the concave-convex groove (18) of the disc hub I and the concave-convex groove (19) of the disc hub II; at the same time, the designed torque limiting torque of the torque limiting vibration damper assembly is linearly adjusted by adjusting the thickness T of the diaphragm spring (4).

9. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 6, characterized in that: The opening of the limiting groove (17) is designed with a Bezier curve to achieve a smooth transition.

10. The torque-adjustable torque-limited damper assembly with built-in diaphragm spring according to claim 1, characterized in that: A gasket (6) is provided on the side of the flange away from the hub II (11) and in contact with the diaphragm spring (4); the positioning ring I (5), the gasket (6) and the positioning ring II (9) are all made of PA66 material.

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