Multifunctional damper characteristics optional torque limiting shock absorber

Abstract

The application discloses a multifunctional torsion-limiting damper with selectable damping characteristics, which comprises a torsion-limiter subassembly and a damper subassembly, the damper subassembly comprising a steel sheet, a bearing ring, a flat pin, a spline shaft sleeve, a large spring, a small spring, a bearing damping sheet, a wave spring, a spring seat, a shaft sleeve plate, a cover plate, a spring seat and damping structure parts, different combinations of the damping structure parts being arranged in an axial damping space between the shaft sleeve plate and the steel sheet and the cover plate, so that the torsion-limiting damper realizes four different damping characteristics. The application has the advantages that different combinations of the damping structure parts are arranged in the axial damping space between the shaft sleeve plate and the steel sheet and the cover plate, the torsion-limiting damper can realize four different damping characteristics under the condition that the main body structure remains unchanged, the structure of the damper subassembly rationally utilizes the excess raw materials of the torsion-limiter subassembly, the material utilization rate is improved, and the machining cost of the parts is reduced.

Description

Technical Field

[0001] This invention relates to the field of powertrain systems for hybrid electric vehicles, and particularly to torsion dampers that achieve various functional damping characteristics. Background Technology

[0002] Torque limiting vibration damping is mainly used in automotive powertrain systems. It is a component installed between the engine and the transmission to provide vibration reduction, noise reduction, and overload protection for automobiles.

[0003] Currently, in hybrid electric vehicles, due to the use of internal combustion engines, it is generally necessary to install a damper at the crankshaft output end of the engine. Also, due to the special structure of some hybrid electric vehicle powertrains, there is no clutch installed between the engine and the transmission to limit torque. Therefore, a torque-limiting damper is generally installed between the engine and the transmission.

[0004] Depending on the different configuration requirements of the powertrain, there are different requirements for the stiffness and damping characteristics of the torsion damper. Usually, the design goal for stiffness is to be as low as possible, but there are various different requirements for damping. In order to achieve different damping characteristics based on the existing space and component structure, it is necessary to design replaceable damping structure components in a specific space to achieve different damping characteristics. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multifunctional torsional damper with selectable damping characteristics, so as to achieve different damping characteristics by means of replaceable damping structural parts while keeping the overall structure of the torsional damper assembly unchanged.

[0006] To address the aforementioned technical problems, this invention provides a multifunctional torsion damper with selectable damping characteristics, comprising a torsion limiter subassembly and a damper subassembly. The damper subassembly includes a steel sheet, a bearing ring, a flat pin, a splined bushing, a large spring, a small spring, a bearing damping plate, a wave spring, a spring seat, a bushing plate, a cover plate, and damping structural components. Different combinations of damping structural components are arranged in the axial damping space between the bushing plate and the steel sheet and cover plate, enabling the torsion damper to achieve four different damping characteristics: asymmetric damping characteristics, symmetric step damping characteristics, asymmetric step damping characteristics, and symmetric damping characteristics.

[0007] Several large springs are circumferentially arranged in the spring windows of the bushing plate. The bushing plate consists of one or more stacked pieces aligned together. Spring seats are arranged on both sides of the large springs. The positioning ribs on the spring seats are engaged with the spring windows of the bushing plate. The bosses on the spring seats are arranged in the center holes of the large springs. The spring guards on the spring seats constrain the large springs. The spring seats separate the large springs from the bushing plate, avoiding direct metal-to-metal contact and friction between the springs and the bushing plate. Splined bushings are arranged in the splined teeth of the bushing plate. Steel plates and cover plates are arranged on both sides of the bushing plate. Bearing rings are arranged between the splined bushings and the steel plates. Bearing damping plates and wave springs are arranged between the splined bushings and the cover plates. Damping structural components are arranged in the axial space between the bushing plate and the steel plates and cover plates. The number of spring windows circumferentially arranged on the steel plates and cover plates corresponds to the number of large springs. The steel plates and cover plates are riveted together by several flat pins, thus forming a shock absorber sub-assembly.

[0008] Small springs are arranged at the center of the large spring, and the number of small springs used is less than or equal to the number of large springs used.

[0009] The damping structure components include a reverse damping drive plate, an asymmetric damping ring, a basic damping plate, a cross washer, a damping disc spring, a symmetric damping ring, a primary damping plate, a step damping washer, and a secondary damping plate. The reverse damping drive plate is equipped with a reverse damping drive flange, a reverse damping drive angle, a damping friction pair B, and a damping friction pair C. The asymmetric damping ring is equipped with a positioning post A, a damping friction pair D, and a damping friction pair E. The basic damping plate is equipped with a damping friction pair F. The symmetric damping ring is equipped with a positioning post B and a damping friction pair I. The primary damping plate is equipped with a damping friction pair J. The step damping washer is equipped with a step damping flange, a positioning surface, and a damping friction pair K. The secondary damping plate is equipped with a damping friction pair L.

[0010] The bushing plate is provided with a spring window, a step damping square hole, a reverse damping drive surface B, splines, a damping friction pair G, and a damping friction pair H; the steel sheet is provided with a damping friction pair A; the spring seat is provided with a positioning rib, a reverse damping drive surface A, a reinforcing rib, a spring stop, and a boss.

[0011] The combination of the reverse damping drive plate, asymmetric damping ring, basic damping plate, cross washer, and damping disc spring achieves asymmetric damping characteristics. The reverse damping drive plate is arranged between the steel plate and the bushing plate, close to the steel plate side; the asymmetric damping ring is arranged between the steel plate and the bushing plate, close to the bushing plate side; positioning pin A is arranged in the inner ring hole of the steel plate; the basic damping plate is arranged between the cover plate and the bushing plate, close to the bushing plate side; the damping disc spring is arranged between the cover plate and the bushing plate, close to the cover plate side; and the cross washer is arranged between the basic damping plate and the damping disc spring. During the counterclockwise rotation of the bushing plate to compress the spring, the damping structure components generate large reverse damping, and the bushing plate, basic damping plate, and asymmetric damping ring always generate sliding friction during the forward and return strokes. During the clockwise rotation of the bushing plate to compress the spring, the damping structure components generate small positive damping, and the bushing plate, basic damping plate, and asymmetric damping ring always generate sliding friction during the forward and return strokes.

[0012] During the counterclockwise rotation of the bushing plate to compress the spring, the damping structure components generate a large reverse damping. During the forward stroke, the reverse damping drive surface B makes contact with the reverse damping drive flange, and the bushing plate drives the reverse damping drive plate to rotate. During the return stroke, the reverse damping drive surface A makes contact with the reverse damping drive angle, and the spring seat drives the reverse damping drive plate to rotate. The bushing plate, the base damping plate, and the asymmetric damping ring always generate sliding friction during the forward and return strokes. The large reverse damping characteristic of the asymmetric damping feature is the damping torque generated by the relative sliding friction between damping friction pairs A and B, C and E, D and G, and F and H. During the clockwise rotation of the bushing plate to compress the spring, the small positive damping characteristic of the asymmetric damping feature is the damping torque generated by the relative sliding friction between damping friction pairs D and G, and F and H.

[0013] The symmetrical damping ring, primary damping plate, step damping washer, secondary damping plate, cross washer, and damping disc spring are combined to achieve symmetrical step damping characteristics. The symmetrical damping ring is positioned between the steel plate and the bushing plate; positioning pin B is positioned in the inner hole of the steel plate; the primary damping plate is positioned between the cover plate and the bushing plate, close to the bushing plate side; the step damping washer is positioned on the other side of the primary damping plate, with its positioning surface in contact with the primary damping plate; the secondary damping plate is positioned on the other side of the step damping washer; the cross washer is positioned on the other side of the secondary damping plate; and the damping disc... The spring is positioned between the cover plate and the bushing plate, close to the cover plate side. During the counterclockwise rotation of the bushing plate to compress the spring, the bushing plate and the symmetrical damping ring always generate sliding friction during the forward and return strokes. When the swing angle is greater than a certain value, the step damping flange contacts the step damping square hole, and the step damping washer and the secondary damping plate always generate sliding friction during the forward and return strokes. When the swing angle is less than a certain value, the step damping flange does not contact the step damping square hole, and the step damping washer and the primary damping plate always generate sliding friction during the forward and return strokes.

[0014] The small damping characteristic of the symmetrical step damping feature is generated by the damping torque produced by the pairwise sliding friction between damping friction pairs I and G, and J and H. The large damping characteristic is generated by the damping torque produced by the pairwise sliding friction between damping friction pairs I and G, and K and L. During the clockwise rotation of the bushing plate to compress the spring, the damping characteristic is the same as that during the counterclockwise rotation of the bushing plate.

[0015] The combination of the reverse damping drive plate, asymmetric damping ring, primary damping plate, step damping washer, secondary damping plate, cross washer, and damping disc spring achieves asymmetric step damping characteristics. The reverse damping drive plate is positioned between the steel plate and the bushing plate, close to the steel plate side. The asymmetric damping ring is positioned between the steel plate and the bushing plate, close to the bushing plate side. The positioning post A of the asymmetric damping ring is positioned in the inner ring hole of the steel plate. The primary damping plate is positioned between the cover plate and the bushing plate, close to the bushing plate side. The step damping washer is positioned on the other side of the primary damping plate, with its positioning surface in contact with the primary damping plate. The secondary damping plate is positioned on the other side of the step damping washer, the cross washer is positioned on the other side of the secondary damping plate, and the damping disc spring is positioned between the cover plate and the bushing plate, close to the cover plate side.

[0016] During the counterclockwise rotation of the bushing plate to compress the spring and when the swing angle is greater than a certain value, the step damping flange contacts the step damping square hole, and the damping structure parts generate reverse step damping. During the forward stroke, the reverse damping drive surface B contacts the reverse damping drive flange, and the bushing plate drives the reverse damping drive plate to rotate. During the return stroke, the reverse damping drive surface A contacts the reverse damping drive angle, and the spring seat drives the reverse damping drive plate to rotate. The bushing plate and the secondary damping plate and the asymmetric damping ring always generate sliding friction during the forward and return strokes. The reverse step damping characteristic of the asymmetric step damping is the damping torque generated by the relative sliding friction between damping friction pairs A and B, damping friction pairs C and E, damping friction pairs D and G, and damping friction pairs K and L.

[0017] During the counterclockwise rotation of the bushing plate to compress the spring and when the swing angle is less than a certain value, the step damping flange and the step damping square hole do not contact each other, and the damping structure parts generate reverse basic damping. During the forward stroke, the reverse damping drive surface B contacts the reverse damping drive flange, and the bushing plate drives the reverse damping drive plate to rotate. During the return stroke, the reverse damping drive surface A contacts the reverse damping drive angle, and the spring seat drives the reverse damping drive plate to rotate. The bushing plate and the first-stage damping plate and the asymmetric damping ring always generate sliding friction during the forward and return strokes. The reverse basic damping characteristic of the asymmetric step damping is the damping torque generated by the relative sliding friction between damping friction pairs A and B, damping friction pairs C and E, damping friction pairs D and G, and damping friction pairs J and H.

[0018] During the clockwise rotation of the bushing plate to compress the spring and when the swing angle is greater than a certain value, the step damping flange contacts the step damping square hole. The bushing plate and the symmetrical damping ring always generate sliding friction during the forward and return strokes. The step damping washer and the secondary damping plate always generate sliding friction during the forward and return strokes. The positive step damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pair I and damping friction pair G, damping friction pair K and damping friction pair L.

[0019] During the clockwise rotation of the bushing plate to compress the spring and when the swing angle is less than a certain value, the step damping flange and the step damping square hole do not contact each other. The bushing plate and the symmetrical damping ring always generate sliding friction during the forward and return strokes. The step damping washer and the first-stage damping plate always generate sliding friction during the forward and return strokes. The positive basic damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pair I and damping friction pair G, damping friction pair J and damping friction pair H.

[0020] The symmetrical damping ring, basic damping plate, cross washer, and damping disc spring are combined to achieve symmetrical damping characteristics. The symmetrical damping ring is positioned between the steel plate and the bushing plate, with its locating pin B positioned in the inner hole of the steel plate. The basic damping plate is positioned between the cover plate and the bushing plate, close to the bushing plate side. The damping disc spring is positioned between the cover plate and the bushing plate, close to the cover plate side. The cross washer is positioned between the basic damping plate and the damping disc spring. During the counterclockwise rotation of the bushing plate to compress the spring, sliding friction is consistently generated between the bushing plate, the basic damping plate, and the symmetrical damping ring during the forward and return strokes. The damping characteristic of the symmetrical damping is generated by the damping torque produced by the relative sliding friction between damping friction pairs I and G, and damping friction pairs F and H. During the clockwise rotation of the bushing plate to compress the spring, the damping characteristics are the same as those during the counterclockwise rotation of the bushing plate.

[0021] The torque limiting assembly includes a torque limiting friction steel sheet, a torque limiting friction plate, a torque limiting cover, a torque limiting cover plate, a torque limiting pressure plate, torque limiting rivets, and a torque limiting disc spring. One friction plate is arranged on each side of the torque limiting friction steel sheet, and the two torque limiting friction plates are tightly attached to both sides of the torque limiting friction steel sheet. A torque limiting cover plate is arranged on one side of one torque limiting friction plate, and a torque limiting pressure plate is arranged on one side of the other torque limiting friction plate. A torque limiting disc spring is arranged on the other side of the torque limiting pressure plate, and a torque limiting cover is arranged on the other side of the torque limiting disc spring. The torque limiting cover has multiple square holes arranged circumferentially, and the torque limiting pressure plate has multiple flanges arranged circumferentially, with the flanges placed in the square holes. The torque limiting cover and the torque limiting cover plate are riveted together by torque limiting rivets. By controlling the height of the torque limiting cover and the torque limiting cover plate, the compression height of the torque limiting disc spring is ensured, generating the required clamping force, thus constituting the torque limiting assembly.

[0022] The torsion limiter subassembly and the vibration damper subassembly are riveted together by several flat pins to form a torsion limiter vibration damper assembly. The torsion limiter subassembly includes a torsion limiter friction steel sheet with a large diameter, a torsion limiter cover, a torsion limiter cover plate, and a torsion limiter pressure plate. The vibration damper subassembly includes a steel sheet with a small diameter, a cover plate, and a bushing plate. The outer circle contour of the steel sheet is the same as the inner circle contour of the torsion limiter pressure plate, and the material thickness is the same. The outer circle contour of the cover plate is the same as the inner circle contour of the torsion limiter friction steel sheet, and the material thickness is the same. The outer circle contour of the bushing plate is smaller than the inner circle contours of the torsion limiter cover and the torsion limiter cover plate, and the material thickness is the same.

[0023] The superior effects of this invention are as follows: 1) In this invention, different combinations of damping structure parts are arranged in the axial damping space between the bushing plate and the steel sheet and cover plate. Under the condition that the main structure remains unchanged, the torsion damper can achieve four different damping characteristics. 2) Through the improved structure, the present invention enables the structural design of the shock absorber sub-assembly to make reasonable use of the excess raw materials of the torque limiter sub-assembly, thereby improving material utilization and reducing parts processing costs. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the asymmetric damping function AA section according to a specific embodiment of the present invention; Figure 3 This is an exploded view of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the symmetrical step damping function AA section according to a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the asymmetric step damping function AA section according to a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the symmetrical damping function AA section according to a specific embodiment of the present invention; Figure 7 This is a schematic diagram of a bushing plate according to a specific embodiment of the present invention; Figure 8 This is a schematic diagram of a spring seat according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of a reverse damping drive plate according to a specific embodiment of the present invention; Figure 10 This is a schematic diagram of a symmetrical damping ring according to a specific embodiment of the present invention; Figure 11 This is a schematic diagram of a step damping washer according to a specific embodiment of the present invention; Figure 12 This is a schematic diagram of an asymmetric damping ring according to a specific embodiment of the present invention; Figure 13 This is a schematic diagram illustrating the symmetrical damping characteristics of a specific embodiment of the present invention; Figure 14 This is a schematic diagram of the symmetrical step damping characteristics of a specific embodiment of the present invention; Figure 15 This is a schematic diagram of the asymmetric damping characteristics of a specific embodiment of the present invention; Figure 16 This is a schematic diagram of the asymmetric step damping characteristics of a specific embodiment of the present invention; Explanation of the labels in the diagram 1- Torque-limiting rivet; 2- Torque-limiting cover plate; 3-Torque-limiting friction plate; 4-Torque-limiting friction steel plate; 5 - Steel sheet; 501 - Damping friction pair A; 6-Reverse damping drive plate; 601 - Reverse damping drive flange; 602 - Reverse damping drive angle; 603 - Damped friction pair B; 604 - Damped friction pair C; 7-Asymmetric damping ring; 701 - Positioning pin A; 702 - Damping friction pair D; 703-Damping friction pair E; 8-Bearing ring; 9-Flat pin; 10-Splined bushing; 11-Large spring; 12-Small spring; 13-Bearing damping plate; 14-Wave spring; 15-Spring seat; 1501 - Positioning rib; 1502 - Reverse damping drive surface A; 1503 - Reinforcing rib; 1504 - Spring guard; 1505 - Boss; 16-Basic damping plate; 1601-Damping friction pair F 17-Cross washer; 18-Damping disc spring; 19-Shaft sleeve plate; 1901 - Spring window; 1902 - Step damped square hole; 1903 - Reverse damping drive surface B; 1904 - Spline tooth; 1905 - Damped friction pair G; 1906 - Damped friction pair H; 20 - Cover plate; 21 - Torque limiting pressure plate; 22 - Limited torsion disc spring; 23 - Limited torsion cover; 24-Symmetrical damping ring; 2401 - Positioning pin B; 2402 - Damping friction pair I; 25 - Primary damping plate; 2501 - Damping friction pair J; 26-Step damping washer; 2601 - Step damping flange; 2602 - Positioning surface; 2603-Damping friction pair K; 27-Secondary damping plate; 2701-Damping friction pair L. Implementation

[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of a specific embodiment of the present invention is shown; Figure 2 A schematic diagram of the asymmetric damping function AA section according to a specific embodiment of the present invention is shown; Figure 3 An exploded view of a specific embodiment of the present invention is shown; Figure 4A schematic diagram of the symmetrical step damping function AA section of a specific embodiment of the present invention is shown; Figure 5 A schematic diagram of the asymmetric step damping function AA section of a specific embodiment of the present invention is shown; Figure 6 A schematic diagram of the symmetrical damping function AA section according to a specific embodiment of the present invention is shown; Figure 7 A schematic diagram of a bushing plate according to a specific embodiment of the present invention is shown; Figure 8 A schematic diagram of a spring seat according to a specific embodiment of the present invention is shown; Figure 9 A schematic diagram of a reverse damping drive plate according to a specific embodiment of the present invention is shown; Figure 10 A schematic diagram of a symmetrical damping ring according to a specific embodiment of the present invention is shown; Figure 11 A schematic diagram of a step damping washer according to a specific embodiment of the present invention is shown; Figure 12 A schematic diagram of an asymmetric damping ring according to a specific embodiment of the present invention is shown; Figure 13 A schematic diagram of the symmetrical damping characteristics of a specific embodiment of the present invention is shown; Figure 14 A schematic diagram of the symmetrical step damping characteristics of a specific embodiment of the present invention is shown; Figure 15 A schematic diagram of the asymmetric damping characteristics of a specific embodiment of the present invention is shown; Figure 16 A schematic diagram of the asymmetric step damping characteristics of a specific embodiment of the present invention is shown.

[0027] like Figures 1-3 As shown, the present invention provides a multifunctional torsional damping damper with selectable damping characteristics, comprising a torsional damper subassembly and a damper subassembly. The damper subassembly includes a steel sheet 5, a bearing ring 8, a flat pin 9, a splined bushing 10, a large spring 11, a small spring 12, a bearing damping plate 13, a wave spring 14, a spring seat 15, a bushing plate 19, a cover plate 20, and damping structural components. Different combinations of damping structural components are arranged in the axial damping space between the bushing plate 19 and the steel sheet 5 and the cover plate 20, enabling the torsional damper to achieve four different damping characteristics: asymmetric damping characteristics, symmetric step damping characteristics, asymmetric step damping characteristics, and symmetric damping characteristics.

[0028] The torque limiting assembly includes a torque limiting friction steel sheet 4, a torque limiting friction plate 3, a torque limiting cover 23, a torque limiting cover plate 2, a torque limiting pressure plate 21, a torque limiting rivet 1, and a torque limiting disc spring 22. One torque limiting friction plate 3 is arranged on each side of the torque limiting friction steel sheet 4, and the two torque limiting friction plates 3 are tightly attached to both sides of the torque limiting friction steel sheet 4. A torque limiting cover plate 2 is arranged on one side of one torque limiting friction plate 3, and a torque limiting pressure plate 21 is arranged on one side of the other torque limiting friction plate 3. A torque limiting disc spring 22 is arranged on the other side of the torque limiting pressure plate 21, and a torque limiting cover 23 is arranged on the other side of the torque limiting disc spring 22. The torque limiting cover 23 has multiple square holes arranged circumferentially, and the torque limiting pressure plate 21 has multiple flanges arranged circumferentially, with the flanges placed in the square holes. The torsion limiting cover 23 and the torsion limiting cover plate 2 are riveted together by the torsion limiting rivet 1. By controlling the height of the torsion limiting cover 23 and the height of the torsion limiting cover plate 2, the compression height of the torsion limiting disc spring 22 is ensured, and the required clamping force is generated, thereby forming the torsion limiting device sub-assembly.

[0029] The damping structure components include a reverse damping drive plate 6, an asymmetric damping ring 7, a basic damping plate 16, a cross washer 17, a damping disc spring 18, a symmetric damping ring 24, a primary damping plate 25, a step damping washer 26, and a secondary damping plate 27. Through different combinations of these components, the torsion damper can achieve four different damping characteristics: asymmetric damping characteristics, symmetric step damping characteristics, asymmetric step damping characteristics, and symmetric damping characteristics.

[0030] The steel sheet 5 is provided with a damping friction pair A501.

[0031] like Figure 7 As shown, the bushing plate 19 is provided with a spring window 1901, a step damping square hole 1902, a reverse damping drive surface B1903, a spline tooth 1904, a damping friction pair G1905, and a damping friction pair H1906.

[0032] like Figure 8 As shown, the spring seat 15 is provided with a positioning rib 1501, a reverse damping drive surface A1502, a reinforcing rib 1503, a spring stop 1504, and a boss 1505. The reinforcing rib 1503 effectively improves the strength of the spring seat 15.

[0033] like Figure 9 As shown, the reverse damping drive plate 6 is provided with a reverse damping drive flange 601, a reverse damping drive angle 602, a damping friction pair B603, and a damping friction pair C604.

[0034] like Figure 12 As shown, the asymmetric damping ring 7 is provided with a positioning post A701, a damping friction pair D702, and a damping friction pair E703.

[0035] A damping friction pair F1601 is arranged on the basic damping plate 16; like Figure 10 As shown, the symmetrical damping ring 24 is provided with a positioning post B2401 and a damping friction pair I2402.

[0036] The primary damping plate 25 is provided with a damping friction pair J2501.

[0037] like Figure 11 As shown, the step damping washer 26 is provided with a step damping flange 2601, a positioning surface 2602, and a damping friction pair K2603.

[0038] The secondary damping plate 27 is provided with a damping friction pair L2701.

[0039] Several large springs 11 are arranged circumferentially in the spring window 1901 of the bushing plate 19. The bushing plate 19 consists of one or more stacked pieces, with a number of 1-3 pieces. Small springs 12 are arranged at the center of the large springs 11, and the number of small springs 12 used is less than or equal to the number of large springs 11 used. Spring seats 15 are arranged on both sides of the large springs 11. The positioning ribs 1501 on the spring seats 15 are engaged with the spring window 1901 of the bushing plate 19. The bosses 1505 on the spring seats 19 are arranged in the center holes of the small springs 12. At the same time, the large springs 11 are constrained by the spring guards 1504. The large springs 11 are separated from the bushing plate 19 by the spring seats 15, avoiding direct metal-to-metal contact and friction between the large springs 11 and the bushing plate 19. A splined bushing 10 is arranged inside the splined teeth 1904 on the bushing plate 19. Steel plates 5 and cover plates 20 are arranged on both sides of the bushing plate 19. A bearing ring 8 is arranged between the splined bushing 10 and the steel plate 5. A bearing damping plate 13 and a wave spring 14 are arranged between the splined bushing 10 and the cover plate 20. Damping structure parts are arranged in the axial space between the bushing plate 19, the steel plate 5, and the cover plate 20. The number of spring windows arranged circumferentially on the steel plate 5 and the cover plate 20 corresponds to the number of large springs 11. The steel plate 5 and the cover plate 20 are riveted together by several flat pins 9 to form a shock absorber sub-assembly.

[0040] like Figure 2 As shown, when the damping structure components use a reverse damping drive plate 6, an asymmetric damping ring 7, a basic damping plate 16, a cross washer 17, and a damping disc spring 18, the following can be achieved: Figure 15The asymmetric damping characteristics shown are as follows: the reverse damping drive plate 6 is arranged between the steel plate 5 and the bushing plate 19 and close to the side of the steel plate 5; the asymmetric damping ring 7 is arranged between the steel plate 5 and the bushing plate 19 and close to the side of the bushing plate 19; the positioning post A701 is arranged in the inner ring hole of the steel plate 5; the basic damping plate 16 is arranged between the cover plate 20 and the bushing plate 19 and close to the side of the bushing plate 19; the damping disc spring 18 is arranged between the cover plate 20 and the bushing plate 19 and close to the side of the cover plate 20; and the cross washer 17 is arranged between the basic damping plate 16 and the damping disc spring 18. During the counterclockwise rotation of the bushing plate 19 to compress the spring, the damping structure components generate reverse damping. During the forward stroke, the reverse damping drive surface B1903 contacts the reverse damping drive flange 601, and the bushing plate 19 drives the reverse damping drive plate 6 to rotate. During the return stroke, the reverse damping drive surface A1502 contacts the reverse damping drive angle 602, and the spring seat 8 drives the reverse damping drive plate 6 to rotate. The bushing plate 19, the base damping plate 16, and the asymmetric damping ring 7 always generate sliding friction during the forward and return strokes. The reverse large damping characteristic of the asymmetric damping is the damping torque generated by the relative sliding friction between the damping friction pairs A501 and B603, C604 and E703, D702 and G1905, and F1601 and H1906. As the bushing plate 19 rotates clockwise to compress the spring, the bushing plate 19, the base damping plate 16, and the asymmetric damping ring 7 always generate sliding friction during the forward and return strokes. The positive small damping characteristic of the asymmetric damping is generated by the damping torque produced by the relative sliding friction between the damping friction pairs D702 and G1905, and the damping friction pairs F1601 and H1906.

[0041] like Figure 4 As shown, when the damping structure components use a symmetrical damping ring 24, a primary damping plate 25, a step damping washer 26, a secondary damping plate 27, a cross washer 17, and a damping disc spring 18, the following can be achieved: Figure 14The symmetrical step damping characteristic shown is as follows: a symmetrical damping ring 24 is arranged between the steel plate 5 and the bushing plate 19; a positioning post B2401 is arranged in the inner ring hole of the steel plate 5; a primary damping plate 25 is arranged between the cover plate 20 and the bushing plate 19 and is close to the bushing plate 19; a step damping washer 26 is arranged on the other side of the primary damping plate 25; a positioning surface 2602 is in contact with the primary damping plate 25; a secondary damping plate 27 is arranged on the other side of the step damping washer 26; a cross washer 17 is arranged on the other side of the secondary damping plate 27; and a damping disc spring 18 is arranged between the cover plate 20 and the bushing plate 19 and is close to the cover plate 20. During the counterclockwise rotation of the bushing plate 19 to compress the spring, the bushing plate 19 and the symmetrical damping ring 24 always generate sliding friction during the forward and return strokes. When the swing angle is greater than a certain value, the step damping flange 2601 contacts the step damping square hole 1902, and the step damping washer 26 and the secondary damping plate 27 always generate sliding friction during the forward and return strokes. When the swing angle is less than a certain value, the step damping flange 2601 and the step damping square hole 1902 do not contact each other, and the step damping washer 26 and the primary damping plate 25 always generate sliding friction during the forward and return strokes. The small damping characteristic of the step damping is the damping torque generated by the relative sliding friction between the damping friction pair I 2402 and the damping friction pair G1905, and the damping friction pair J2501 and the damping friction pair H1906. The large damping characteristic of the step damping is generated by the damping torque produced by the relative sliding friction between damping friction pairs I 2402 and G1905, and K2603 and L2701. When the bushing plate 19 rotates clockwise to compress the spring, its damping characteristic is the same as when it rotates counterclockwise.

[0042] like Figure 5 As shown, when the damping structure components use a reverse damping drive plate 6, an asymmetric damping ring 7, a primary damping plate 25, a step damping washer 26, a secondary damping plate 27, a cross washer 17, and a damping disc spring 18, the following can be achieved: Figure 16 The asymmetric step damping characteristics are shown. A reverse damping drive plate 6 is arranged between the steel plate 5 and the bushing plate 19 and close to the side of the steel plate 5. An asymmetric damping ring 7 is arranged between the steel plate 5 and the bushing plate 19 and close to the side of the bushing plate 19. A positioning post A701 is arranged in the inner ring hole of the steel plate 5. A primary damping plate 25 is arranged between the cover plate 20 and the bushing plate 19 and close to the side of the bushing plate 19. A step damping washer 26 is arranged on the other side of the primary damping plate 25. A positioning surface 2602 is in contact with the primary damping plate 25. A secondary damping plate 27 is arranged on the other side of the step damping washer 26. A cross washer 17 is arranged on the other side of the secondary damping plate 27. A damping disc spring 18 is arranged between the cover plate 20 and the bushing plate 19 and close to the side of the cover plate 20.

[0043] When the bushing plate 19 rotates counterclockwise to compress the spring and the swing angle is greater than a certain value, the step damping flange 2601 contacts the step damping square hole 1902, and the damping structure parts generate reverse step damping. During the forward stroke, the reverse damping drive surface B1903 contacts the reverse damping drive flange 601, and the bushing plate 19 drives the reverse damping drive plate 6 to rotate. During the return stroke, the reverse damping drive surface A1502 contacts the reverse damping drive angle 602, and the spring seat 8 drives the reverse damping drive plate 6 to rotate. The bushing plate 19, the secondary damping plate 27, and the asymmetric damping ring 7 always generate sliding friction during the forward and return strokes. The reverse step damping characteristic of the asymmetric step damping characteristic is formed by the damping friction pair A501 and damping friction pair B603, damping friction pair C604 and damping friction pair E703, and damping friction pair D702 and damping friction pair G1905. The damping torque generated by the relative sliding friction between damping friction pair K2603 and damping friction pair L2701.

[0044] When the bushing plate 19 rotates counterclockwise to compress the spring and the swing angle is less than a certain value, the step damping flange 2601 and the step damping square hole 1902 do not contact each other, and the damping structure parts generate reverse basic damping. During the forward stroke, the reverse damping drive surface B1903 contacts the reverse damping drive flange 601, and the bushing plate 19 drives the reverse damping drive plate 6 to rotate. During the return stroke, the reverse damping drive surface A1502 contacts the reverse damping drive angle 602, and the spring seat 8 drives the reverse damping drive plate 6 to rotate. The bushing plate 19, the first-stage damping plate 25, and the asymmetric damping ring 7 always generate sliding friction during the forward and return strokes. The reverse basic damping characteristic of the asymmetric step damping characteristic is formed by the damping friction pair A501 and damping friction pair B603, damping friction pair C604 and damping friction pair E703, and damping friction pair D702 and damping friction pair G1905. The damping torque generated by the relative sliding friction between damping friction pair J2501 and damping friction pair H1906.

[0045] When the bushing plate 19 rotates clockwise to compress the spring and the swing angle is greater than a certain value, the step damping flange 2601 contacts the step damping square hole 1902. The bushing plate 19 and the symmetrical damping ring 24 always generate sliding friction during the forward and return strokes. The step damping washer 26 and the secondary damping plate 27 always generate sliding friction during the forward and return strokes. The positive step damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between the damping friction pair I 2402 and the damping friction pair G1905, the damping friction pair K2603 and the damping friction pair L2701.

[0046] When the bushing plate 19 rotates clockwise to compress the spring and the swing angle is less than a certain value, the step damping flange 2601 and the step damping square hole 1902 do not contact each other. The bushing plate 19 and the symmetrical damping ring 24 always generate sliding friction during the forward and return strokes. The step damping washer 26 and the first-stage damping plate 25 always generate sliding friction during the forward and return strokes. The positive basic damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between the damping friction pair I 2402 and the damping friction pair G1905, and the damping friction pair J2501 and the damping friction pair H1906.

[0047] like Figure 6 As shown, when the damping structure components use a symmetrical damping ring 24, a basic damping plate 16, a cross washer 17, and a damping disc spring 18, the following can be achieved: Figure 13 The symmetrical damping characteristic shown is characterized by a symmetrical damping ring 24 positioned between the steel plate 5 and the bushing plate 19, a positioning pin B2401 positioned in the inner ring hole of the steel plate 5, a basic damping plate 16 positioned between the cover plate 20 and the bushing plate 19 and close to the bushing plate 19, a damping disc spring 18 positioned between the cover plate 20 and the bushing plate 19 and close to the cover plate 20, and a cross washer 17 positioned between the basic damping plate 16 and the damping disc spring 18. During the counterclockwise rotation of the bushing plate 19 to compress the spring, sliding friction is consistently generated between the bushing plate 19, the basic damping plate 16, and the symmetrical damping ring 24 during the forward and return strokes. The damping characteristic of the symmetrical damping feature is generated by the damping torque produced by the relative sliding friction between damping friction pairs I 2402 and G1905, and damping friction pairs F 1601 and H 1906. When the bushing plate 19 rotates clockwise to compress the spring, its damping characteristics are the same as those when the bushing plate 19 rotates counterclockwise.

[0048] The torque limiter subassembly and the vibration damper subassembly are riveted together by several flat pins 9 to form the torque-limiting vibration damper assembly. The torque limiter subassembly uses four types of larger diameter parts: torque-limiting friction steel sheet 4, torque-limiting cover 23, torque-limiting cover plate 2, and torque-limiting pressure plate 21. The vibration damper subassembly uses three types of smaller diameter parts: steel sheet 5, cover plate 20, and bushing plate 19. The outer contour of the steel sheet 5 is the same as the inner contour of the torque-limiting pressure plate 21, and they have the same material thickness. The outer contour of the cover plate 20 is the same as the inner contour of the torque-limiting friction steel sheet 4, and they have the same material thickness. The outer contour of the bushing plate 19 is smaller than the inner contours of the torque-limiting cover 23 and the inner contour of the torque-limiting cover plate 2, but they have the same material thickness.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multifunctional torsional damping damper with selectable damping characteristics, comprising a torsional limiter subassembly and a damper subassembly, characterized in that: The shock absorber sub-assembly includes steel sheets, bushing plates, cover plates, large springs, spring seats, and damping structure components. The damping structure components include a reverse damping drive plate, an asymmetric damping ring, a basic damping plate, a cross washer, a damping disc spring, a symmetric damping ring, a primary damping plate, a step damping washer, and a secondary damping plate. The reverse damping drive plate is equipped with a reverse damping drive flange, a reverse damping drive angle, damping friction pair B, and damping friction pair C. The asymmetric damping ring is equipped with a positioning post A, damping friction pair D, and damping friction pair E. The basic damping plate... The device is equipped with a damping friction pair F; a positioning post B and a damping friction pair I are arranged on the symmetrical damping ring; a damping friction pair J is arranged on the first-stage damping plate; a step damping washer, a step damping flange, a positioning surface, and a damping friction pair K are arranged on the step damping washer; a damping friction pair L is arranged on the second-stage damping plate; and damping structural components with different combinations are arranged in the axial damping space between the bushing plate and the steel plate and cover plate, so that the torsion damper can achieve four different damping characteristics: asymmetric damping characteristics, symmetrical step damping characteristics, asymmetric step damping characteristics, and symmetrical damping characteristics. The combination of the reverse damping drive plate, asymmetric damping ring, basic damping plate, cross washer, and damping disc spring achieves asymmetric damping characteristics. The reverse damping drive plate is arranged between the steel plate and the bushing plate and close to the steel plate side; the asymmetric damping ring is arranged between the steel plate and the bushing plate and close to the bushing plate side; the positioning post A is arranged in the inner ring hole of the steel plate; the basic damping plate is arranged between the cover plate and the bushing plate and close to the bushing plate side; the damping disc spring is arranged between the cover plate and the bushing plate and close to the cover plate side; and the cross washer is arranged between the basic damping plate and the damping disc spring. During the counterclockwise compression of the spring by the bushing plate, the damping structure components generate large reverse damping; during the clockwise compression of the spring by the bushing plate, the damping structure components generate small positive damping. The symmetrical damping ring, primary damping plate, step damping washer, secondary damping plate, cross washer, and damping disc spring are combined to achieve symmetrical step damping characteristics. The symmetrical damping ring is positioned between the steel plate and the bushing plate; positioning pin B is positioned in the inner hole of the steel plate; the primary damping plate is positioned between the cover plate and the bushing plate, close to the bushing plate side; the step damping washer is positioned on the other side of the primary damping plate, with its positioning surface in contact with the primary damping plate; the secondary damping plate is positioned on the other side of the step damping washer; the cross washer is positioned on the other side of the secondary damping plate; and the damping disc... The spring is positioned between the cover plate and the bushing plate, close to the cover plate side. During the counterclockwise rotation of the bushing plate to compress the spring, the bushing plate and the symmetrical damping ring always generate sliding friction during the forward and return strokes. When the swing angle is greater than a certain value, the step damping flange contacts the step damping square hole, and the step damping washer and the secondary damping plate always generate sliding friction during the forward and return strokes. When the swing angle is less than a certain value, the step damping flange does not contact the step damping square hole, and the step damping washer and the primary damping plate always generate sliding friction during the forward and return strokes. During the clockwise rotation of the bushing plate to compress the spring, the damping characteristics are the same as those during the counterclockwise rotation of the bushing plate. The combination of the reverse damping drive plate, asymmetric damping ring, primary damping plate, step damping washer, secondary damping plate, cross washer, and damping disc spring achieves asymmetric step damping characteristics. The reverse damping drive plate is arranged between the steel plate and the bushing plate and close to the steel plate side. The asymmetric damping ring is arranged between the steel plate and the bushing plate and close to the bushing plate side. The positioning post A of the asymmetric damping ring is arranged in the inner ring hole of the steel plate. The primary damping plate is arranged between the cover plate and the bushing plate and close to the bushing plate side. The step damping washer is arranged on the other side of the primary damping plate, and the positioning surface of the step damping washer is in contact with the primary damping plate. The secondary damping plate is arranged on the other side of the step damping washer. The cross washer is arranged on the other side of the secondary damping plate. The damping disc spring is arranged between the cover plate and the bushing plate and close to the cover plate side. The symmetrical damping ring, basic damping plate, cross washer, and damping disc spring are combined to achieve symmetrical damping characteristics. The symmetrical damping ring is arranged between the steel plate and the bushing plate, and the positioning post B of the symmetrical damping ring is arranged in the inner ring hole of the steel plate. The basic damping plate is arranged between the cover plate and the bushing plate and close to the bushing plate side. The damping disc spring is arranged between the cover plate and the bushing plate and close to the cover plate side. The cross washer is arranged between the basic damping plate and the damping disc spring. During the counterclockwise rotation of the bushing plate to compress the spring, the bushing plate, the basic damping plate, and the symmetrical damping ring always generate sliding friction during the forward and return strokes. The damping characteristics of the symmetrical damping feature are the damping torque generated by the relative sliding friction between damping friction pair I and damping friction pair G, and damping friction pair F and damping friction pair H. During the clockwise rotation of the bushing plate to compress the spring, the damping characteristics are the same as those during the counterclockwise rotation of the bushing plate.

2. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: Several large springs are circumferentially arranged in the spring windows of the bushing plate. Spring seats are arranged on both sides of the large springs. The positioning ribs on the spring seats are locked onto the spring windows of the bushing plate. The bosses on the spring seats are arranged in the center holes of the large springs. The spring guards on the spring seats constrain the large springs and separate them from the bushing plate. Splined bushings are arranged in the splined teeth of the bushing plate. Steel plates and cover plates are arranged on both sides of the bushing plate. Bearing rings are arranged between the splined bushings and the steel plates. Bearing damping plates and wave springs are arranged between the splined bushings and the cover plates. The number of spring windows circumferentially arranged on the steel plates and cover plates corresponds to the number of large springs. The steel plates and cover plates are riveted together by several flat pins to form a shock absorber sub-assembly.

3. The multifunctional torsional damper with selectable damping characteristics according to claim 2, characterized in that: The bushing plate is provided with a spring window, a step damping square hole, a reverse damping drive surface B, splines, a damping friction pair G, and a damping friction pair H; the steel sheet is provided with a damping friction pair A; the spring seat is provided with a positioning rib, a reverse damping drive surface A, a reinforcing rib, a spring stop, and a boss.

4. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: To achieve asymmetric damping characteristics, during the counterclockwise rotation of the bushing plate to compress the spring, during the forward stroke, the reverse damping drive surface B makes contact with the reverse damping drive flange, and the bushing plate drives the reverse damping drive plate to rotate. During the return stroke, the reverse damping drive surface A makes contact with the reverse damping drive angle, and the spring seat drives the reverse damping drive plate to rotate. The reverse large damping characteristic is the damping torque generated by the relative sliding friction between damping friction pairs A and B, C and E, D and G, and F and H. During the clockwise compression of the spring by the bushing plate, the positive small damping characteristic is the damping torque generated by the relative sliding friction between damping friction pairs D and G, and damping friction pairs F and H.

5. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: The small damping characteristic of the symmetrical step damping characteristic is the damping torque generated by the relative sliding friction of damping friction pair I and damping friction pair G, damping friction pair J and damping friction pair H. The large damping characteristic of the symmetrical step damping characteristic is the damping torque generated by the relative sliding friction of damping friction pair I and damping friction pair G, damping friction pair K and damping friction pair L.

6. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: To achieve asymmetric step damping characteristics, during the counterclockwise rotation of the bushing plate to compress the spring and when the swing angle exceeds a certain value, the step damping flange contacts the step damping square hole, generating reverse step damping in the damping structure components. During the forward stroke, the reverse damping drive surface B contacts the reverse damping drive flange, causing the bushing plate to rotate the reverse damping drive plate. During the return stroke, the reverse damping drive surface A contacts the reverse damping drive angle, causing the spring seat to rotate the reverse damping drive plate. The bushing plate, the secondary damping plate, and the asymmetric damping ring consistently generate step damping during both the forward and return strokes. Sliding friction occurs; during the counterclockwise rotation of the bushing plate to compress the spring and when the swing angle is less than a certain value, the step damping flange and the step damping square hole do not contact each other, and the damping structure parts generate reverse basic damping. During the forward stroke, the reverse damping drive surface B contacts the reverse damping drive flange, and the bushing plate drives the reverse damping drive plate to rotate. During the return stroke, the reverse damping drive surface A contacts the reverse damping drive angle, and the spring seat drives the reverse damping drive plate to rotate. The bushing plate and the first-stage damping plate and the asymmetric damping ring always generate sliding friction during the forward and return strokes.

7. The multifunctional torsional damper with selectable damping characteristics according to claim 6, characterized in that: The reverse step damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pairs A and B, C and E, D and G, and K and L. The reverse foundation damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pairs A and B, C and E, D and G, and J and H.

8. The multifunctional torsional damper with selectable damping characteristics according to claim 6, characterized in that: During the clockwise rotation of the compression spring of the bushing plate and when the swing angle is greater than a certain value, the step damping flange contacts the step damping square hole. The bushing plate and the symmetrical damping ring always generate sliding friction during the process and return. The step damping washer and the secondary damping plate always generate sliding friction during the process and return. The positive step damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pair I and damping friction pair G, damping friction pair K and damping friction pair L. During the clockwise rotation of the bushing plate to compress the spring and when the swing angle is less than a certain value, the step damping flange and the step damping square hole do not contact each other. The bushing plate and the symmetrical damping ring always generate sliding friction during the forward and return strokes. The step damping washer and the first-stage damping plate always generate sliding friction during the forward and return strokes. The positive basic damping characteristic of the asymmetric step damping characteristic is the damping torque generated by the relative sliding friction between damping friction pair I and damping friction pair G, damping friction pair J and damping friction pair H.

9. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: The torque limiting assembly includes a torque limiting friction steel sheet, a torque limiting friction plate, a torque limiting cover, a torque limiting cover plate, a torque limiting pressure plate, torque limiting rivets, and a torque limiting disc spring. One friction plate is arranged on each side of the torque limiting friction steel sheet, and the two torque limiting friction plates are tightly attached to both sides of the torque limiting friction steel sheet. A torque limiting cover plate is arranged on one side of one torque limiting friction plate, and a torque limiting pressure plate is arranged on one side of the other torque limiting friction plate. A torque limiting disc spring is arranged on the other side of the torque limiting pressure plate, and a torque limiting cover is arranged on the other side of the torque limiting disc spring. Multiple square holes are arranged circumferentially on the torque limiting cover, and multiple flanges are arranged circumferentially on the torque limiting pressure plate, with the flanges placed in the square holes. The torque limiting cover and the torque limiting cover plate are riveted together by torque limiting rivets. By controlling the height of the torque limiting cover and the torque limiting cover plate, the compression height of the torque limiting disc spring is ensured, generating the required clamping force, thus constituting the torque limiting assembly.

10. The multifunctional torsional damper with selectable damping characteristics according to claim 1, characterized in that: The torsion limiter subassembly and the vibration damper subassembly are riveted together by several flat pins to form a torsion limiter vibration damper assembly. The torsion limiter subassembly includes a torsion limiter friction steel sheet with a large diameter, a torsion limiter cover, a torsion limiter cover plate, and a torsion limiter pressure plate. The vibration damper subassembly includes a steel sheet with a small diameter, a cover plate, and a bushing plate. The outer circle contour of the steel sheet is the same as the inner circle contour of the torsion limiter pressure plate, and the material thickness is the same. The outer circle contour of the cover plate is the same as the inner circle contour of the torsion limiter friction steel sheet, and the material thickness is the same. The outer circle contour of the bushing plate is smaller than the inner circle contours of the torsion limiter cover and the torsion limiter cover plate, and the material thickness is the same.

Images