Large-rotation-angle multi-piece type torsion-limiting shock absorber integrated with spring seat

Abstract

The invention discloses a large-corner multi-piece type torsion-limiting shock absorber integrated with a spring seat, which comprises a shock absorber sub-assembly and a multi-piece type torsion-limiting device sub-assembly, the multi-piece type torsion-limiting device sub-assembly is arranged at the inner diameter position of the shock absorber sub-assembly, and a side spring seat is circumferentially arranged at the edge covering position of a steel piece. A middle spring seat, two side spring seats, a first-stage spring group and a second-stage spring group form a spring group sub-assembly, and a plurality of spring group sub-assemblies are circumferentially distributed in the shock absorber sub-assembly, so that the multi-stage rigidity characteristic and the asymmetric damping characteristic are realized. The torsion-limiting damper has the advantages that the rigidity grading characteristic is optimized, and the damping effect of the torsion-limiting damper under the working conditions of starting, stopping, idling charging and the like is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of powertrain systems of hybrid electric vehicles, and in particular to a large-angle multi-piece torque-limiting vibration damper with an integrated spring seat. Background Art

[0002] Torque limiting dampers are mainly used in automobile powertrain systems. They are usually components installed between the engine and the gearbox to provide vibration reduction, noise reduction and overload torque protection for the vehicle.

[0003] At present, in hybrid vehicles, due to the use of internal combustion engines, shock absorbers must generally be installed at the crankshaft output end of the engine. Due to the particularity of the powertrain structure of some hybrid vehicles, there is no torque-limiting clutch installed between the engine and the gearbox. In such applications, shock absorbers must have a torque-limiting function. In order to obtain better vehicle comfort, the performance of the torque-limiting shock absorber must be improved within a limited space.

[0004] CN214425011U discloses a torque limiting vibration damper, which generates stiffness by compressing a coil spring and generating torque limiting by pressing a disc spring against a friction plate, and only has basic vibration reduction performance and torque limiting capacity, and is a relatively low-cost solution with limited vibration reduction performance and torque limiting capacity. This is where the present application needs to focus on improvement.

[0005] CN216158197U discloses an asymmetric damping large-angle torque limiting shock absorber, which improves the performance of spring damping by achieving a larger torsion angle, and further optimizes the matching effect of the whole vehicle by achieving asymmetric damping, but its spring arrangement position is relatively close to the center, and the torque limiter occupies a large space. This is the area that needs to be improved in this application.

[0006] CN217784117U discloses a large-angle multi-piece torque-limiting shock absorber, which arranges the torque limiter at the center of the shock absorber. In the same space, the shock absorber has a larger arrangement space, achieves a larger torsion angle, and reduces the vibration reduction stiffness. In order to achieve better vibration reduction performance on this basis, it is necessary to further reduce the vibration reduction stiffness and realize asymmetric damping. This is the area that needs to be improved in this application. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a large-angle multi-plate torque-limiting shock absorber with an integrated spring seat, which optimizes the stiffness grading characteristics and effectively improves the vibration reduction effect of the torque-limiting shock absorber under working conditions such as start-stop and idling charging.

[0008] In order to solve the above technical problems, the present invention provides a large-angle multi-plate torque limiting shock absorber with an integrated spring seat, including a shock absorber sub-assembly and a multi-plate torque limiter sub-assembly, wherein the multi-plate torque limiter sub-assembly is arranged at the inner diameter position of the shock absorber sub-assembly and at the same time in the central basin-shaped space of two steel plates; after the engine power passes through the shock absorber sub-assembly, the friction pair and the drive groove at the inner diameter position of the steel plate transmit the power to the multi-plate torque limiter sub-assembly.

[0009] The shock absorber sub-assembly includes a shaft sleeve plate, a steel sheet, a cover plate, a primary large spring, a primary small spring, a cover plate retaining ring, a damping ring, a flat pin, a limit pin, an intermediate spring seat, a damping disc spring seat, a damping disc spring, a secondary large spring, a secondary small spring, a rubber spring, a side spring seat, a cover plate wave spring, and a reverse damping drive plate; wherein: The shaft sleeve plate is provided with a plurality of first reverse damping driving surfaces distributed in the circumferential direction, and a first damping friction pair and a second damping friction pair at the inner diameter position of the shaft sleeve plate; The steel sheet is provided with a plurality of circumferentially distributed edges and a third damping friction pair at the mid-diameter position of the steel sheet; The cover plate is provided with a plurality of circumferentially distributed de-weighting holes, which are used to optimize the inertia distribution of each component; The damping ring is provided with a plurality of inner tooth grooves distributed in the circumferential direction, and a fourth damping friction pair and a fifth damping friction pair at the outer diameter position of the damping ring; The limit pin is provided with a de-weighting ring, which is used to optimize the inertia distribution of each component; The middle spring seat is provided with a waist-shaped hole, a limit pin hole, a first positioning column, a second positioning column, a guide angle, a first limit surface, a second limit surface, and a sliding surface; A sixth damping friction pair is arranged on the damping disc spring seat; The side spring seat is provided with a third positioning column, a third limiting surface, a groove, a supporting surface, and a second reverse damping driving surface; The reverse damping drive plate is provided with a plurality of reverse damping drive angles distributed in the circumferential direction, and a seventh damping friction pair and an eighth damping friction pair at the inner diameter position of the reverse damping drive plate.

[0010] A steel sheet is arranged on both sides of the axial position of the shaft sleeve plate, and a cover plate is arranged on the outer side of the axial position of the steel plate. A damping ring and a reverse damping drive plate are arranged in the axial space between the first damping friction pair on the shaft sleeve plate and the steel sheet on one side, and the reverse damping drive plate is arranged between the damping ring and the steel sheet. A damping disc spring seat and a damping disc spring are arranged in the axial space between the second damping friction pair on the shaft sleeve plate and the steel sheet on the other side. In the axial space between the two steel sheets and the cover plates on both sides, a cover plate retaining ring is arranged on one side, and a cover plate wave spring is arranged on the other side.

[0011] The two ends of the flat pin pass through the flat pin holes distributed circumferentially at the inner diameter position of the steel sheet, and the two steel sheets are riveted together through the flat pin. The two ends of the limit pin pass through the limit pin holes distributed circumferentially on the cover plate, and the middle section of the limit pin passes through the limit pin hole on the intermediate spring seat. Multiple intermediate spring seats are evenly distributed circumferentially between the two cover plates. The two cover plates and the multiple intermediate spring seats are connected as a whole by riveting the two ends of the limit pin.

[0012] The first-level small spring is arranged at the center of the first-level large spring to form a first-level spring group; the rubber spring is arranged at the center of the second-level small spring, and the second-level small spring is arranged at the center of the second-level large spring to form a second-level spring group; the side spring seats are circumferentially arranged at the edge wrapping position of the steel sheet, a side spring seat is arranged on each side of a middle spring seat, a group of first-level spring groups and a group of second-level spring groups are arranged between the middle spring seat and the two side spring seats, one end of the first-level small spring is arranged on the first positioning column side of the middle spring seat, and the other end is arranged on the third positioning column side of the side spring seat, one end of the second-level small spring is arranged on the second positioning column side of the middle spring seat, and the other end is arranged on the third positioning column side of the side spring seat, an middle spring seat, two side spring seats, a group of first-level spring groups, and a group of second-level spring groups form a spring component assembly, and multiple spring component assemblies are circumferentially distributed in the shock absorber sub-assembly.

[0013] During the working process of the shock absorber sub-assembly generating stiffness characteristics, the shaft sleeve plate and the steel sheet generate a relative rotation angle to compress the spring component assembly. The shaft sleeve plate drives the side spring seat to compress the primary spring group by contacting the supporting surface of the side spring seat. The primary spring group drives the middle spring seat. The middle spring seat further compresses the secondary spring group. The secondary spring group contacts another side spring seat. The supporting surface of the side spring seat contacts the steel sheet. The edge of the steel sheet is placed in the groove of the side spring seat. When the primary spring group is compressed to the set position, the first limit surface of the middle spring seat contacts the third limit surface of the side spring seat on one side. Surface contact limit, at this time, the first-level spring group cannot be further compressed, forming the first-level stiffness characteristics of the vibration reduction characteristics; further compress the second-level spring group to the set position, the second positioning column of the middle spring seat and the third positioning column of the side spring seat on the other side contact the rubber spring at the same time, forming the second-level stiffness characteristics of the vibration reduction characteristics; further compress the second-level spring group and the rubber spring to the set position, the second limiting surface of the middle spring seat and the third limiting surface of the side spring seat on the other side contact and limit, at this time the second-level spring group and the rubber spring cannot be further compressed, forming the third-level stiffness characteristics of the vibration reduction characteristics. During the compression process of the spring component assembly, the sliding surface of the middle spring seat contacts and slides with the shaft sleeve plate, and the guide angles on both sides of the middle spring seat make the sliding smooth.

[0014] In the working process of the shock absorber sub-assembly generating the damping characteristic, when the shaft sleeve plate compresses the spring component assembly clockwise, a reverse large damping characteristic is generated. During the forward stroke, the first reverse damping driving surface on the shaft sleeve plate contacts the reverse damping driving angle on the reverse damping driving plate, and the shaft sleeve plate drives the reverse damping driving plate to rotate relative to the steel sheet and the damping ring. The damping ring cooperates with the flat pin through multiple circumferentially distributed internal tooth grooves, and the damping ring and the steel sheet cannot rotate relative to each other; during the return stroke, the second reverse damping driving surface on the side spring seat contacts the reverse damping driving angle on the reverse damping driving plate, and the side spring seat drives the reverse damping driving plate to rotate relative to the steel sheet and the damping ring. The shaft sleeve plate and the damping disc spring seat, the shaft sleeve plate and the damping ring, the damping ring and the reverse damping driving plate, and the reverse damping driving plate and the steel sheet always generate sliding friction during the forward stroke and the return stroke. The reverse large damping characteristic is the damping torque generated by the relative sliding friction between the second damping friction pair and the sixth damping friction pair, the first damping friction pair and the fifth damping friction pair, the fourth damping friction pair and the eighth damping friction pair, and the third damping friction pair and the seventh damping friction pair. When the shaft sleeve plate compresses the spring component assembly counterclockwise, a positive small damping characteristic is generated, and sliding friction is always generated between the shaft sleeve plate, the damping ring, and the damping disc spring seat during the forward and return strokes. The positive small damping characteristic is the damping torque generated by the relative sliding friction between the second damping friction pair and the sixth damping friction pair, and the first damping friction pair and the fifth damping friction pair.

[0015] The multi-plate torque limiter subassembly includes a torque limiting disc spring, a torque limiting disc spring seat, a spline rivet, a spline sleeve, a first flexible plate, a torque limiting friction plate, a torque limiting drive plate, a hollow rivet, a force transmission plate, a bearing ring, a bearing damping plate, a wave spring, and a second flexible plate; a torque limiting friction plate is arranged on each side of the axial position of the first flexible plate and the second flexible plate, and the hollow rivets pass through the rivet holes on the torque limiting friction plate and the rivet holes on the flexible plate respectively, and the two torque limiting friction plates are riveted to the first flexible plate and the second flexible plate respectively, and the heads of the hollow rivets are arranged in the rivet hole countersunk holes on the torque limiting friction plate to form the first torque limiting friction plate assembly and the second torque limiting friction plate assembly.

[0016] A first torque-limiting friction plate assembly and a second torque-limiting friction plate assembly are arranged on both sides of the axial position of the spline sleeve, a bearing ring is arranged between the spline sleeve and the first torque-limiting friction plate assembly, a bearing damping plate and a wave spring are arranged between the spline sleeve and the second torque-limiting friction plate assembly, a torque-limiting drive plate is arranged between the first torque-limiting friction plate assembly and the second torque-limiting friction plate assembly, a force transmission plate is arranged in the radial space between the spline sleeve and the torque-limiting drive plate, the inner teeth of the force transmission plate contact with the outer teeth of the spline sleeve to transmit torque, the outer ring of the force transmission plate and the inner hole gap of the torque-limiting drive plate are matched and positioned, the spline rivets pass through the rivet holes on the first flexible plate, the second flexible plate and the force transmission plate respectively to rivet the three together, the torque-limiting disc spring seat is arranged on the other side of the first torque-limiting friction plate assembly, and the torque-limiting disc spring is arranged on the other side of the torque-limiting disc spring seat, thereby forming a multi-disc torque limiter sub-assembly.

[0017] The beneficial effects of the present invention are: 1) The present invention integrates a spring seat on the basis of a large-angle multi-piece torque limiter structure, thereby further increasing the torsion angle of the shock absorber, achieving more levels of stiffness, and optimizing the stiffness grading characteristics; 2) The present invention integrates a spline floating function on the basis of a large-angle multi-piece torque limiter structure, effectively coping with the reduction in the service life of the torque limiter caused by the eccentricity between the engine crankshaft and the transmission shaft, and effectively improving the allowable eccentricity and service life of the torque limiter; 3) The present invention integrates an asymmetric damping function on the basis of a large-angle multi-plate torque limiter structure, thereby realizing different positive and negative damping functions of the shock absorber, and effectively improving the vibration reduction effect of the torque limiter in working conditions such as start-stop and idling charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the assembly structure of a specific embodiment of the present invention; Figure 2 for Figure 1 The upper part of the AA section view; Figure 3 for Figure 1 The lower part of the AA section view; Figure 4 It is the upper half of the exploded view of a specific embodiment of the present invention; Figure 5 The lower half of the exploded view of a specific embodiment of the present invention; Figure 6 It is a schematic diagram of an axonometric view of a specific embodiment of the present invention; Figure 7 A schematic diagram of an intermediate spring seat according to a specific embodiment of the present invention; Figure 8 It is a schematic diagram of a side spring seat according to a specific embodiment of the present invention; Fig. 9 It is a schematic diagram of the vibration reduction characteristics of a specific embodiment of the present invention; Description of the symbols in the figure 1- shaft sleeve plate; 101-reverse damping driving surface A; 102-damping friction pair A; 103- damping friction pair B; 2-Steel sheet; 201-edge wrapping; 202-damping friction pair C; 3- Cover plate; 301-delete duplicate holes; 4-First-level large spring 5-First-level small spring; 6-cover plate retaining ring; 7- Damping ring; 701-internal tooth groove; 702-damping friction pair D; 703- Damping friction pair E; 8-torsion limiting disc spring; 9-torsion limiting disc spring seat; 10-Spline rivets; 11-spline shaft sleeve; 12-flexible plate A; 13-torsion limiting friction plate; 14-flat pin; 15-limit pin; 1501-remove heavy ring; 16-middle spring seat; 1601-waist-shaped hole; 1602-limiting pin hole: 1603-positioning column A; 1604-positioning column B; 1605-guide angle; 1606-limiting surface A; 1607-limiting surface B; 1608-sliding surface; 17- damping disc spring seat; 1701- Damping friction pair F; 18- damping disc spring; 19- torque limiting drive plate; 20-Hollow rivet; 21-Secondary large spring; 22-secondary small spring; 23-rubber spring; 24-side spring seat; 2401- positioning column C; 2402- limiting surface C; 2403-groove; 2404-support surface; 2405-reverse damping driving surface B; 25-Cover plate wave spring; 26-reverse damping drive plate; 2601-reverse damping drive angle; 2602-damping friction pair G; 2603- Damping friction pair H; 27-force transmission plate; 28-bearing ring; 29-bearing damping plate; 30-wave spring; 31-Flexible board B. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 The schematic diagram of the assembly structure of a specific embodiment of the present invention is shown. Figure 2 Shows Figure 1 The upper part of the AA section diagram, Figure 3 Shows Figure 1 The lower part of the AA section diagram, Figure 4 The upper part of the exploded view of a specific embodiment of the present invention is shown. Figure 5 The lower half of the exploded view of a specific embodiment of the present invention is shown. Figure 6 A schematic isometric view of a specific embodiment of the present invention is shown. Figure 7 A schematic diagram of an intermediate spring seat in a specific embodiment of the present invention is shown. Figure 8 A schematic diagram of a side spring seat according to a specific embodiment of the present invention is shown. Fig. 9 A schematic diagram of the vibration reduction characteristics of a specific embodiment of the present invention is shown.

[0021] like Figure 1-Figure 3 As shown, the present invention provides a large-angle multi-plate torque-limiting shock absorber with an integrated spring seat, comprising a shock absorber subassembly and a multi-plate torque limiter subassembly.

[0022] like Figure 4-Figure 5 As shown, the shock absorber sub-assembly includes a shaft sleeve plate 1, a steel sheet 2, a cover plate, a primary large spring 4, a primary small spring 5, a cover plate retaining ring 6, a damping ring 7, a flat pin 14, a limit pin 15, an intermediate spring seat 16, a damping disc spring seat 17, a damping disc spring 18, a secondary large spring 21, a secondary small spring 22, a rubber spring 23, a side spring seat 24, a cover plate wave spring 25, and a reverse damping drive plate 26; wherein: The shaft sleeve plate 1 is provided with a plurality of reverse damping driving surfaces A101 distributed in the circumferential direction, as well as a damping friction pair A102 and a damping friction pair B103 at the inner diameter position of the shaft sleeve plate.

[0023] The steel sheet 2 is provided with a plurality of circumferentially distributed edges 201 and a damping friction pair C202 at the mid-diameter position of the steel sheet.

[0024] The cover plate 3 is provided with a plurality of circumferentially distributed de-weighting holes 301 , which are used to optimize the inertia distribution of each component.

[0025] The damping ring 7 is provided with a plurality of inner tooth grooves 701 distributed in the circumferential direction, and a damping friction pair D702 and a damping friction pair E703 at the outer diameter position of the damping ring.

[0026] The limiting pin 15 is provided with a de-weighting ring 1501 , which is used to optimize the inertia distribution of each component.

[0027] like Figure 7As shown, the middle spring seat 16 is provided with a waist-shaped hole 1601 , a limit pin hole 1602 , a positioning column A 1603 , a positioning column B 1604 , a guide angle 1605 , a limit surface A 1606 , a limit surface B 1607 , and a sliding surface 1608 .

[0028] A damping friction pair F1701 is arranged on the damping disc spring seat 17 .

[0029] like Figure 8 As shown, the side spring seat 24 is provided with a positioning column C2401, a limiting surface C2402, a groove 2403, a supporting surface 2404, and a reverse damping driving surface B2405.

[0030] The reverse damping drive plate 26 is provided with a plurality of reverse damping drive angles 2601 distributed in the circumferential direction, and a damping friction pair G2602 and a damping friction pair H2603 at the inner diameter position of the reverse damping drive plate.

[0031] A steel sheet 2 is arranged on both sides of the axial position of the shaft sleeve plate 1, and a cover plate 3 is arranged on both sides of the axial position of the steel sheet 2. A damping ring 7 and a reverse damping drive plate 26 are arranged in the axial space between the damping friction pair A102 on the shaft sleeve plate 1 and the steel sheet 2 on one side, and the reverse damping drive plate 26 is arranged between the damping ring 7 and the steel sheet 2. A damping disc spring seat 17 and a damping disc spring 18 are arranged in the axial space between the damping friction pair B103 on the shaft sleeve plate 1 and the steel sheet 2 on the other side. In the axial space between the two steel sheets 2 and the cover plates 3 on both sides, a cover plate retaining ring 6 is arranged on one side, and a cover plate wave spring 25 is arranged on the other side.

[0032] The two ends of the flat pin 14 pass through the flat pin holes circumferentially distributed at the inner diameter position of the steel sheet 2, and the two steel sheets 2 are riveted together through the flat pin 14. The two ends of the limit pin 15 pass through the limit pin holes circumferentially distributed on the cover plate 3, and the middle section of the limit pin 15 passes through the limit pin hole 1602 on the intermediate spring seat 16. Multiple intermediate spring seats 16 are evenly distributed circumferentially between the two cover plates 3. The two cover plates 3 and the multiple intermediate spring seats 16 are connected as a whole by riveting the two ends of the limit pin 15.

[0033] The first-level small spring 5 is arranged at the center of the first-level large spring 4 to form a first-level spring group; the rubber spring 23 is arranged at the center of the second-level small spring 22, and the second-level small spring 22 is arranged at the center of the second-level large spring 21 to form a second-level spring group. The side spring seats 24 are circumferentially arranged at the edge 201 position of the steel sheet 2, a side spring seat 24 is arranged on each side of an intermediate spring seat 16, a first-level spring group and a second-level spring group are arranged between the intermediate spring seat 16 and the two side spring seats 24, one end of the first-level small spring 5 is arranged on the side of the positioning column A1603 of the intermediate spring seat 16, and the other end is arranged on the side of the positioning column C2401 of the side spring seat 24, one end of the second-level small spring 22 is arranged on the side of the positioning column B1604 of the intermediate spring seat 16, and the other end is arranged on the side of the positioning column C2401 of the side spring seat 24, an intermediate spring seat 16, two side spring seats 24, a first-level spring group, and a second-level spring group constitute a spring component assembly, and multiple spring component assemblies are circumferentially distributed in the shock absorber sub-assembly.

[0034] like Figure 6 As shown, in the working process of the shock absorber sub-assembly generating stiffness characteristics, the shaft sleeve plate 1 and the steel sheet 2 generate a relative rotation angle to compress the spring component assembly, the shaft sleeve plate 1 contacts the supporting surface 2404 of the side spring seat 24, drives the side spring seat 24 to compress the primary spring group, the primary spring group drives the middle spring seat 16, the middle spring seat 16 further compresses the secondary spring group, the secondary spring group contacts another side spring seat 24, the supporting surface 2404 of the side spring seat 24 contacts the steel sheet 2, the edge 201 of the steel sheet 2 is placed in the groove 2403 of the side spring seat 24, when the primary spring group is compressed to the set position, the limit surface A1606 of the middle spring seat 16 contacts the side spring on one side. The limiting surface C2402 of the seat 24 contacts and limits, at which time the primary spring group cannot be further compressed, forming the first-level stiffness characteristic of the vibration reduction characteristic, further compressing the secondary spring group to the set position, the positioning column B1604 of the middle spring seat 16 and the positioning column C2401 of the side spring seat 24 on the other side contact the rubber spring 23 at the same time, forming the second-level stiffness characteristic of the vibration reduction characteristic, further compressing the secondary spring group and the rubber spring 23 to the set position, the limiting surface B1607 of the middle spring seat 16 contacts and limits the limiting surface C2402 of the side spring seat 24 on the other side, at which time the secondary spring group and the rubber spring 23 cannot be further compressed, forming the third-level stiffness characteristic of the vibration reduction characteristic. During the compression process of the spring component assembly, the sliding surface 1608 of the middle spring seat 16 contacts and slides with the shaft sleeve plate 1, and the guide angles 1605 on both sides of the middle spring seat 16 ensure smooth sliding.

[0035] like Figure 6As shown, in the working process of the shock absorber subassembly generating damping characteristics, when the shaft sleeve plate 1 compresses the spring component assembly clockwise, a reverse large damping characteristic is generated. During the forward stroke, the reverse damping driving surface A101 on the shaft sleeve plate 1 contacts the reverse damping driving angle 2601 on the reverse damping driving plate 26, and the shaft sleeve plate 1 drives the reverse damping driving plate 26 to rotate relative to the steel sheet 2 and the damping ring 7. The damping ring 7 cooperates with the flat pin 14 through a plurality of circumferentially distributed internal tooth grooves 701, and the damping ring 7 and the steel sheet 2 cannot rotate relative to each other. During the return stroke, the reverse damping driving surface B2405 on the side spring seat 24 contacts the reverse damping driving angle 2601 on the reverse damping driving plate 26. The dynamic angle 2601 is in contact, and the side spring seat 24 drives the reverse damping drive plate 26 to rotate relative to the steel sheet 2 and the damping ring 7. The shaft sleeve plate 1 and the damping disc spring seat 17, the shaft sleeve plate 1 and the damping ring 7, the damping ring 7 and the reverse damping drive plate 26, the reverse damping drive plate 26 and the steel sheet 2 always generate sliding friction during the forward and return strokes. The reverse large damping characteristic is the damping torque generated by the relative sliding friction between the damping friction pair B103 and the damping friction pair F1701, the damping friction pair A102 and the damping friction pair E703, the damping friction pair D702 and the damping friction pair H2603, and the damping friction pair C202 and the damping friction pair G2602. When the shaft sleeve plate 1 compresses the spring component assembly counterclockwise, a positive small damping characteristic is generated, and sliding friction is always generated between the shaft sleeve plate 1 and the damping ring 7 and the damping disc spring seat 17 during the forward and return strokes. The positive small damping characteristic is the damping torque generated by the relative sliding friction between the damping friction pair B103 and the damping friction pair F1701, and the damping friction pair A102 and the damping friction pair E703.

[0036] like Fig. 9 As shown, the vibration damping characteristics of the large-angle multi-plate torque limiting shock absorber with integrated spring seat of the present invention are compared with the vibration damping characteristics of the traditional large-angle multi-plate torque limiting shock absorber. The traditional large-angle multi-plate torque limiting shock absorber only realizes the 2-level stiffness and symmetrical damping characteristics shown in the vibration damping characteristic A, while the large-angle multi-plate torque limiting shock absorber with integrated spring seat of the present invention realizes the characteristics shown in the vibration damping characteristic B, has 3-level stiffness, asymmetric damping and a larger rotation angle, and realizes better vibration damping performance in vehicle matching.

[0037] The multi-piece torque limiter subassembly includes a torque limiting disc spring 8, a torque limiting disc spring seat 9, a spline rivet 10, a spline shaft sleeve 11, a flexible plate A12, a torque limiting friction plate 13, a torque limiting drive plate 19, a hollow rivet 20, a force transmission plate 27, a bearing ring 28, a bearing damping plate 29, a wave spring 30, and a flexible plate B31.

[0038] After the engine power passes through the shock absorber sub-assembly, the friction pair and the drive groove at the inner diameter position of the steel plate 2 transmit the power to the multi-plate torque limiter sub-assembly.

[0039] A torsion limiting friction plate 13 is arranged on both sides of the axial position of the flexible plate A12 and the flexible plate B31, and the hollow rivet 20 passes through the rivet holes on the torsion limiting friction plate 13 and the rivet holes of the flexible plate A12 and the flexible plate B31 respectively, and the two torsion limiting friction plates are riveted to the flexible plate A12 and the flexible plate B31 respectively. At the same time, the head of the hollow rivet 20 is arranged in the countersunk hole of the rivet hole on the torsion limiting friction plate 13 to form a torsion limiting friction plate assembly A and a torsion limiting friction plate assembly B.

[0040] A torque limiting friction plate assembly A and a torque limiting friction plate assembly B are arranged on both sides of the axial position of the spline sleeve 11, a bearing ring 28 is arranged between the spline sleeve 11 and the torque limiting friction plate assembly A, a bearing damping plate 29 and a wave spring 30 are arranged between the spline sleeve 11 and the torque limiting friction plate assembly B, the torque limiting drive plate 19 is arranged between the torque limiting friction plate assembly A and the torque limiting friction plate assembly B, and a force transmission plate 27 is arranged in the radial space between the spline sleeve 11 and the torque limiting drive plate 19. The inner teeth of the force transmission plate 27 contact with the outer teeth of the spline sleeve 11 to transmit torque, and the outer ring of the force transmission plate 27 and the inner hole clearance of the torque limiting drive plate 19 are matched and positioned, and the spline rivet 10 passes through the rivet holes on the flexible plate A12, the flexible plate B31, and the force transmission plate 27 to rivet the three together, the torque limiting disc spring seat 9 is arranged on the other side of the torque limiting friction plate assembly A, and the torque limiting disc spring 8 is arranged on the other side of the torque limiting disc spring seat 9, thereby forming a multi-piece torque limiter sub-assembly.

[0041] The multi-plate torque limiter sub-assembly is arranged at the inner diameter position of the shock absorber sub-assembly and in the central basin-shaped space of the two steel plates 2, thereby forming a large-angle multi-plate torque limiter shock absorber assembly with an integrated spring seat.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-angle multi-plate torque-limiting shock absorber with an integrated spring seat, comprising a shock absorber subassembly and a multi-plate torque-limiting subassembly, characterized in that: The multi-plate torque limiter sub-assembly is arranged at the inner diameter position of the shock absorber sub-assembly and in the central basin-shaped space of the two steel plates; the side spring seats are circumferentially arranged at the edge wrapping position of the steel plates, a side spring seat is arranged on each side of a middle spring seat, a group of primary spring groups and a group of secondary spring groups are arranged between the middle spring seat and the two side spring seats, a middle spring seat, two side spring seats, a group of primary spring groups, and a group of secondary spring groups constitute a spring component assembly, and multiple spring component assemblies are circumferentially distributed in the shock absorber sub-assembly to achieve multi-stage stiffness characteristics and asymmetric damping characteristics.

2. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 1, characterized in that: The shock absorber sub-assembly includes a shaft sleeve plate, a steel sheet, a cover plate, a first-level large spring, a first-level small spring, a cover plate retaining ring, a damping ring, a flat pin, a limit pin, an intermediate spring seat, a damping disc spring seat, a damping disc spring, a second-level large spring, a second-level small spring, a rubber spring, a side spring seat, a cover plate wave spring, and a reverse damping drive plate; the first-level small spring is arranged at the center of the first-level large spring to form a first-level spring group; the rubber spring is arranged at the center of the second-level small spring, and the second-level small spring is arranged at the center of the second-level large spring to form a second-level spring group.

3. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 2, characterized in that: One end of the first-stage small spring is arranged on the first positioning column side of the middle spring seat, and the other end is arranged on the third positioning column side of the side spring seat. One end of the second-stage small spring is arranged on the second positioning column side of the middle spring seat, and the other end is arranged on the third positioning column side of the side spring seat.

4. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 2, characterized in that: A steel sheet is arranged on both sides of the axial position of the shaft sleeve plate, and a cover plate is arranged on the outer side of the axial position of the steel plate. A damping ring and a reverse damping drive plate are arranged in the axial space between the first damping friction pair on the shaft sleeve plate and the steel sheet on one side, and the reverse damping drive plate is arranged between the damping ring and the steel sheet. A damping disc spring seat and a damping disc spring are arranged in the axial space between the second damping friction pair on the shaft sleeve plate and the steel sheet on the other side. In the axial space between the two steel sheets and the cover plates on both sides, a cover plate retaining ring is arranged on one side, and a cover plate wave spring is arranged on the other side.

5. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 1, characterized in that: In the process of the shock absorber sub-assembly generating multi-stage stiffness characteristics, the shaft sleeve plate and the steel sheet generate relative rotation angle compression spring component assembly, the shaft sleeve plate contacts with the supporting surface of the side spring seat, drives the side spring seat to compress the primary spring group, the primary spring group drives the middle spring seat, the middle spring seat further compresses the secondary spring group, the secondary spring group contacts with another side spring seat, the supporting surface of the side spring seat contacts with the steel sheet, the edge of the steel sheet is placed in the groove of the side spring seat, when the primary spring group is compressed to the set position, the first limit surface of the middle spring seat contacts with the third limit surface of the side spring seat on one side The position surface contacts and limits, at this time, the first-level spring group cannot be further compressed, forming the first-level stiffness characteristics of the vibration reduction characteristics; the second-level spring group is further compressed to the set position, the second positioning column of the middle spring seat and the third positioning column of the side spring seat on the other side contact with the rubber spring at the same time, forming the second-level stiffness characteristics of the vibration reduction characteristics; the second-level spring group and the rubber spring are further compressed to the set position, the second limiting surface of the middle spring seat contacts and limits the third limiting surface of the side spring seat on the other side, at this time the second-level spring group and the rubber spring cannot be further compressed, forming the third-level stiffness characteristics of the vibration reduction characteristics.

6. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 1, characterized in that: In the process of the shock absorber sub-assembly generating asymmetric damping characteristics, a reverse large damping characteristic is generated in the process of the shaft sleeve plate compressing the spring component assembly clockwise, and the reverse large damping characteristic is the damping torque generated by the relative sliding friction between the second damping friction pair and the sixth damping friction pair, the first damping friction pair and the fifth damping friction pair, the fourth damping friction pair and the eighth damping friction pair, and the third damping friction pair and the seventh damping friction pair; when the shaft sleeve plate compresses the spring component assembly counterclockwise, a positive small damping characteristic is generated, and the positive small damping characteristic is the damping torque generated by the relative sliding friction between the second damping friction pair and the sixth damping friction pair, and the first damping friction pair and the fifth damping friction pair.

7. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 2, characterized in that: The two ends of the flat pin respectively pass through the flat pin holes distributed circumferentially at the inner diameter position of the steel sheet, and the two steel sheets are riveted together; the two ends of the limit pin respectively pass through the limit pin holes distributed circumferentially on the cover plate, and the middle section of the limit pin passes through the limit pin hole on the intermediate spring seat. Multiple intermediate spring seats are evenly distributed circumferentially between the two cover plates, and the two cover plates and multiple intermediate spring seats are connected together by riveting the two ends of the limit pin.

8. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to any one of claims 1 to 7, characterized in that: The shaft sleeve plate is provided with a plurality of first reverse damping driving surfaces distributed in the circumferential direction, and a first damping friction pair and a second damping friction pair at the inner diameter position of the shaft sleeve plate; The steel sheet is provided with a plurality of circumferentially distributed edges and a third damping friction pair at the mid-diameter position of the steel sheet; The cover plate is provided with a plurality of circumferentially distributed de-weighting holes, which are used to optimize the inertia distribution of each component; The damping ring is provided with a plurality of inner tooth grooves distributed in the circumferential direction, and a fourth damping friction pair and a fifth damping friction pair at the outer diameter position of the damping ring; The limit pin is provided with a de-weighting ring, which is used to optimize the inertia distribution of each component; The middle spring seat is provided with a waist-shaped hole, a limit pin hole, a first positioning column, a second positioning column, a guide angle, a first limit surface, a second limit surface, and a sliding surface; A sixth damping friction pair is arranged on the damping disc spring seat; The side spring seat is provided with a third positioning column, a third limiting surface, a groove, a supporting surface, and a second reverse damping driving surface; The reverse damping drive plate is provided with a plurality of reverse damping drive angles distributed in the circumferential direction, and a seventh damping friction pair and an eighth damping friction pair at the inner diameter position of the reverse damping drive plate.

9. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 1, characterized in that: The multi-plate torque limiter subassembly includes a torque limiting disc spring, a torque limiting disc spring seat, a spline rivet, a spline sleeve, a first flexible plate, a torque limiting friction plate, a torque limiting drive plate, a hollow rivet, a force transmission plate, a bearing ring, a bearing damping plate, a wave spring, and a second flexible plate; a torque limiting friction plate is arranged on each side of the axial position of the first flexible plate and the second flexible plate, and the hollow rivets pass through the rivet holes on the torque limiting friction plate and the rivet holes on the flexible plate respectively, and the two torque limiting friction plates are riveted to the first flexible plate and the second flexible plate respectively, and the heads of the hollow rivets are arranged in the rivet hole countersunk holes on the torque limiting friction plate to form the first torque limiting friction plate assembly and the second torque limiting friction plate assembly.

10. The large-angle multi-piece torque-limiting vibration damper with integrated spring seat according to claim 9, characterized in that: A first torque-limiting friction plate assembly and a second torque-limiting friction plate assembly are arranged on both sides of the axial position of the spline sleeve, a bearing ring is arranged between the spline sleeve and the first torque-limiting friction plate assembly, a bearing damping plate and a wave spring are arranged between the spline sleeve and the second torque-limiting friction plate assembly, a torque-limiting drive plate is arranged between the first torque-limiting friction plate assembly and the second torque-limiting friction plate assembly, a force transmission plate is arranged in the radial space between the spline sleeve and the torque-limiting drive plate, the inner teeth of the force transmission plate contact with the outer teeth of the spline sleeve to transmit torque, the outer ring of the force transmission plate and the inner hole gap of the torque-limiting drive plate are matched and positioned, the spline rivets pass through the rivet holes on the first flexible plate, the second flexible plate and the force transmission plate respectively to rivet the three together, the torque-limiting disc spring seat is arranged on the other side of the first torque-limiting friction plate assembly, and the torque-limiting disc spring is arranged on the other side of the torque-limiting disc spring seat, thereby forming a multi-disc torque limiter sub-assembly.

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