Flywheel shock absorber with integrated multi-stage variable damping

Abstract

The invention discloses a flywheel shock absorber with integrated multi-stage variable damping, comprising a flywheel sub-assembly, a shock absorber sub-assembly and a multi-stage variable damping sub-assembly, wherein the flywheel outer ring of the flywheel sub-assembly is provided with a plurality of radially arranged step damping friction pairs, variable damping friction pairs and variable damping control surfaces, wherein the multi-stage variable damping sub-assembly is assembled, and step damping and local variable damping are realized simultaneously. The invention has the advantages that step damping and variable damping are realized by a set of multi-stage variable damping sub-assembly, the structure is compact, and space is saved.

Description

Technical Field

[0001] The invention relates to a torsional vibration damper matched with a hybrid electric vehicle and a fuel vehicle, and in particular to a flywheel vibration damper with integrated multi-stage variable damping. Background Art

[0002] There are different driving conditions during the operation of hybrid vehicles, such as idling conditions, driving conditions, and power generation conditions. Different conditions require their own corresponding vibration reduction frequencies.

[0003] With the increasing demand for driving comfort during vehicle operation and the continuous development of hybrid vehicles, it is particularly necessary to match a high-performance shock absorber for hybrid vehicles. Although the dual-mass flywheel has good overall vibration reduction performance, its structure does not have a multi-stage variable damping mechanism with adjustable damping, and cannot better optimize the vibration reduction effect of the vehicle under various working conditions. This is where this application needs to focus on improvement. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a flywheel shock absorber with integrated multi-stage variable damping, which can realize step damping and local variable damping at the same time.

[0005] In order to solve the above problems, the present invention provides a flywheel shock absorber with integrated multi-stage variable damping, including a flywheel sub-assembly, a shock absorber sub-assembly and a multi-stage variable damping sub-assembly. The flywheel outer ring of the flywheel sub-assembly is provided with a plurality of radially arranged step damping friction pairs, variable damping friction pairs and variable damping control surfaces, in which the multi-stage variable damping sub-assembly is assembled to realize step damping and local variable damping at the same time.

[0006] The multi-stage variable damping sub-assembly includes a ball, a step damping ring, a damping wave spring, a damping frame and a variable damping spring. The step damping ring is provided with a step damping ring friction pair, a step damping ring wave spring groove and a buckle. The damping frame is provided with a damping frame friction pair, a damping frame wave spring groove, a damping spring hole, a driving surface, an axial limiting surface and a ball groove. The variable damping spring is assembled in the damping spring hole, and the ball is assembled in the ball groove. The ball compresses the damping spring in the axial direction. One side of the damping wave spring is assembled in the step damping ring wave spring groove on the step damping ring, and the other side is assembled in the damping frame wave spring groove on the damping frame. The buckles on both sides of the step damping ring are assembled on both sides of the damping frame, so that the step damping ring and the damping frame will not slide relative to each other.

[0007] The step damping generated by the step damping ring friction pair being fitted with the step damping friction pair, and the damping frame friction pair being fitted with the variable damping friction pair, is generated when the shaft sleeve plate drives the multi-stage variable damping sub-assembly, and the step damping is greater than the basic damping.

[0008] The variable damping generated by the ball compression variable damping spring and the pressure generated by the damping spring are transmitted to the damping frame, so that the damping between the damping frame friction pair and the variable damping friction pair changes.

[0009] The ball is pressed against the variable damping control surface by the elastic force of the variable damping spring, and the cylindrical surface of the ball is tangent to the variable damping control surface. The variable damping control surface is a linear combination of any straight line and curve according to the design requirements of the variable damping.

[0010] The axial limiting surface on the damping frame fits with the side surface at the outer diameter of the steel sheet to play the role of axial limiting.

[0011] The flywheel sub-assembly comprises a gear ring and a flywheel, the gear ring and the flywheel are assembled by shrink fitting or welding, and the outer ring of the flywheel is provided with rivet holes for assembling with the shock absorber sub-assembly.

[0012] The shock absorber subassembly includes a pre-damping damping part and a main damping damping part. The shock absorber subassembly includes a flat pin, a cover plate, a large spring, a small spring, a damping ring, a pre-damping cover plate, a rivet, a steel sheet, a sleeve plate, a disc spring seat, a disc spring, a bearing ring, a wave spring, a spline and a pre-damping spring. The damping ring, the disc spring seat and the disc spring realize the basic damping part of the main damping, and the multi-stage variable damping subassembly realizes the variable damping part of the main damping damping part.

[0013] The shaft sleeve plate always drives the basic damping part to work during the process of compressing the large spring and the small spring. A driving angle is provided at the outer diameter of the shaft sleeve plate. The side surface of the driving angle fits the driving surface on the damping frame, thereby driving the multi-stage variable damping sub-assembly to work. There is a certain idle angle between the side surface of the driving angle and the driving surface on the damping frame. The multi-stage variable damping sub-assembly does not work within the idle angle range.

[0014] The superior effects of the structure of the present invention are:

[0015] 1) The present invention integrates step damping characteristics, realizes the characteristics of small damping when the angular acceleration is less than a certain value, starts step damping when the angular acceleration reaches a certain value, increases the damping, optimizes the torsional vibration of the powertrain, and prevents resonance;

[0016] 2) The present invention integrates variable damping characteristics to achieve personalized linear or nonlinear damping requirements at the torsion angle corresponding to the shock absorber, thereby optimizing the vibration effect of the entire vehicle;

[0017] 3) The step damping and variable damping of the present invention are realized by a set of multi-stage variable damping sub-assemblies, which has a compact structure and saves space. 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:

[0019] Figure 1 It is a schematic diagram of the assembly of the present invention;

[0020] Figure 2 It is a cross-sectional view of the assembly of the present invention;

[0021] Figure 3 It is a cross-sectional view of the assembly of the present invention;

[0022] Figure 4 It is a schematic cross-sectional view of a subassembly of the present invention;

[0023] Figure 5 It is a schematic cross-sectional view of a subassembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the multi-stage variable damping characteristics of the present invention;

[0025] Description of the symbols in the figure

[0026] 10a-flywheel sub-assembly; 10b-shock absorber sub-assembly;

[0027] 10c-multi-stage variable damping sub-assembly;

[0028] 1-gear ring;

[0029] 2 – flywheel;

[0030] 201-step damping friction pair; 202-variable damping friction pair;

[0031] 203 - variable damping control surface;

[0032] 3- flat pin; 4- cover plate;

[0033] 5-large spring; 6-small spring;

[0034] 7-damping ring; 8-pre-vibration damping cover plate;

[0035] 9- rivet; 10- steel sheet;

[0036] 11-shaft sleeve plate; 1101-driving angle;

[0037] 12-disc spring seat; 13-disc spring;

[0038] 14-bearing ring; 15-wave spring;

[0039] 16-spline; 17-pre-damping spring;

[0040] 18 - ball bearing;

[0041] 19 - step damping ring;

[0042] 1901-step damping ring friction pair; 1902-step damping ring wave spring groove;

[0043] 1903-Snap-on;

[0044] 20 - damping wave spring;

[0045] 21 - damping frame;

[0046] 2101- friction pair of damping frame; 2102- wave spring groove of damping frame;

[0047] 2103 - damping spring hole; 2104 - driving surface;

[0048] 2105-axial limit surface; 2106-ball groove;

[0049] 22 - Variable damping spring. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] Figure 1 The schematic diagram of the assembly of the present invention is shown; Figure 2 A cross-sectional view of the assembly of the present invention is shown; Figure 3 A cross-sectional view of the assembly of the present invention is shown; Figure 4 A schematic cross-sectional view of a subassembly of the present invention is shown; Figure 5 A schematic cross-sectional view of a subassembly of the present invention is shown; Figure 6 A schematic diagram of the multi-stage variable damping characteristics of the present invention is shown.

[0052] like Figure 1 , Figure 2 and Figure 5 As shown, the present invention provides a flywheel shock absorber with integrated multi-stage variable damping, including a flywheel sub-assembly 10a, a shock absorber sub-assembly 10b and a multi-stage variable damping sub-assembly 10c.

[0053] The flywheel subassembly 10a includes a ring gear 1 and a flywheel 2, and the ring gear 1 and the flywheel 2 are assembled by shrink fitting or welding. The outer ring of the flywheel 2 is provided with rivet holes for assembly with the shock absorber subassembly 10b. The outer ring of the flywheel 2 is also provided with a plurality of radially arranged step damping friction pairs 201, variable damping friction pairs 202, and variable damping control surfaces 203, in which a variable number of multi-stage variable damping subassemblies 10c are assembled.

[0054] The shock absorber subassembly 10b includes a flat pin 3, a cover plate 4, a large spring 5, a small spring 6, a damping ring 7, a pre-damping cover plate 8, a rivet 9, a steel sheet 10, a shaft sleeve plate 11, a disc spring seat 12, a disc spring 13, a bearing ring 14, a wave spring 15, a spline 16 and a pre-damping spring 17. The shock absorber subassembly 10b is a common structure and is not described in detail in this application. There are two damping parts in the shock absorber subassembly 10b. One part is the pre-vibration damping part composed of a wave spring 15 and a bearing ring 14. The pressure generated by the wave spring 15 causes sliding friction between the shaft sleeve plate 11 and the spline 16 with which the bearing ring 14 contacts, thereby generating pre-vibration damping; the other part is the main vibration damping damping part composed of a damping ring 7, a disc spring seat 12 and a disc spring 13. The pressure generated by the disc spring 13 causes sliding friction between the cover plate 4 and the shaft sleeve plate 11 with which the damping ring 7 and the disc spring seat 12 contact, thereby generating main vibration damping, which realizes the basic damping function of the main vibration damping. The integrated multi-stage variable damping subassembly 10c of the present invention is aimed at the variable damping of the main vibration damping damping part. The shaft sleeve plate 11 always drives the basic damping to work during the process of compressing the large spring 5 and the small spring 6. A driving angle 1101 is provided at the outer diameter of the shaft sleeve plate 11. When the amplitude of the shaft sleeve plate 11 exceeds a certain amplitude, the driving angle 1101 drives the multi-stage variable damping sub-assembly 10c to work.

[0055] like Figure 3 , 4The multi-stage variable damping sub-assembly 10c shown includes a ball 18, a step damping ring 19, a damping wave spring 20, a damping frame 21 and a variable damping spring 22. The step damping ring 19 is provided with a step damping ring friction pair 1901, a step damping ring wave spring groove 1902 and a buckle 1903. The damping frame 21 is provided with a damping frame friction pair 2101, a damping frame wave spring groove 2102, a damping spring hole 2103, a driving surface 2104, an axial limiting surface 2105 and a ball groove 2106. The variable damping spring 22 is assembled in the damping spring hole 2103, and the ball 18 is assembled in the ball groove 2106. During operation, the ball 18 compresses the damping spring 22 in the axial direction of the damping spring 22. One side of the damping wave spring 20 is assembled in the step damping ring wave spring groove 1902 on the step damping ring 19, and the other side is assembled in the damping frame wave spring groove 2105 on the damping frame 21. The buckles 1903 on both sides of the step damping ring 19 are assembled on both sides of the damping frame 21 to ensure that the step damping ring 19 and the damping frame 21 will not slide relative to each other. The multi-stage variable damping sub-assembly 10c thus formed is assembled between the step damping friction pair 201 and the variable damping friction pair 202 radially arranged on the outer ring of the flywheel 2, the step damping ring friction pair 1901 is fitted with the step damping friction pair 201, the damping frame friction pair 2101 is fitted with the variable damping friction pair 202, the ball 18 is pressed against the variable damping control surface 203 by the elastic force of the variable damping spring 22, the cylindrical surface of the ball 18 is tangent to the variable damping control surface 203, and the variable damping control surface 203 is designed as a linear combination of any straight line and curve according to the design requirements of the variable damping. The axial limit surface 2105 on the damping frame 21 is fitted with the side surface at the outer diameter of the steel sheet 10, which plays the role of axial limit. When the multi-stage variable damping sub-assembly 10c is working, the side surface of the driving angle 1101 on the shaft sleeve plate 11 fits with the driving surface 2104 on the damping frame 21, thereby driving the multi-stage variable damping sub-assembly 10c to work. There is a certain idling angle between the side surface of the driving angle 1101 on the shaft sleeve plate 11 and the driving surface 2104 on the damping frame 21. Within the idling angle range, the multi-stage variable damping sub-assembly 10c does not work.

[0056] like Figure 6As shown, the damping of the structure of the present invention can be divided into three parts. The first part is the basic damping generated by the damping ring 7, the disc spring seat 12 and the disc spring 13. The working area of ​​the basic damping is X, and X is the idling angle between the side of the driving angle 1101 on the shaft sleeve plate 11 and the driving surface 2104 on the damping frame 21. The second part is the step damping generated by the step damping ring friction pair 1901 and the step damping friction pair 201, and the damping frame friction pair 2101 and the variable damping friction pair 202. When the shaft sleeve plate 11 drives the multi-stage variable damping sub-assembly 10c, the step damping is greater than the basic damping. The third part is the variable damping generated by the variable damping spring 22 compressed by the ball 18 due to the shape restriction of the variable damping control surface 203. The pressure generated by the damping spring 22 is transmitted to the damping frame 21, so that the damping between the damping frame friction pair 2101 and the variable damping friction pair 202 changes. Figure 6 The linear damping variable damping a in the Y region and the nonlinear damping variable damping b in the Z region are only reference examples. By designing the linear shape of the variable damping control surface 203, the variable damping can be designed to any desired parameter.

[0057] 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 flywheel shock absorber with integrated multi-stage variable damping, comprising a flywheel sub-assembly and a shock absorber sub-assembly, characterized in that: It also includes a multi-stage variable damping sub-assembly, wherein the outer ring of the flywheel sub-assembly is provided with a plurality of radially arranged step damping friction pairs, variable damping friction pairs and variable damping control surfaces, and the multi-stage variable damping sub-assembly is assembled therein to realize step damping and local variable damping at the same time; The multi-stage variable damping sub-assembly includes a ball, a step damping ring, a damping wave spring, a damping frame and a variable damping spring. The step damping ring is provided with a step damping ring friction pair, a step damping ring wave spring groove and a buckle. The damping frame is provided with a damping frame friction pair, a damping frame wave spring groove, a damping spring hole, a driving surface, an axial limit surface and a ball groove. The variable damping spring is assembled in the damping spring hole, the ball is assembled in the ball groove, and the ball compresses the damping spring in the axial direction thereof. One side of the damping wave spring is assembled in the step damping ring wave spring groove on the step damping ring, and the other side is assembled in the damping frame wave spring groove on the damping frame. The buckles on both sides of the step damping ring are assembled on both sides of the damping frame. The step damping generated by the step damping ring friction pair being fitted with the step damping friction pair, and the damping frame friction pair being fitted with the variable damping friction pair, is generated when the shaft sleeve plate drives the multi-stage variable damping sub-assembly, and the step damping is greater than the basic damping; The ball is pressed against the variable damping control surface by the elastic force of the variable damping spring, and the cylindrical surface of the ball is tangent to the variable damping control surface. The variable damping control surface is a linear combination of any straight line and curve according to the design requirements of the variable damping.

2. The flywheel shock absorber with integrated multi-stage variable damping according to claim 1, characterized in that: The ball compresses the variable damping spring to generate variable damping, and the pressure generated by the damping spring is transmitted to the damping frame, so that the damping between the friction pair of the damping frame and the variable damping friction pair changes.

3. The flywheel shock absorber with integrated multi-stage variable damping according to claim 1, characterized in that: The axial limiting surface on the damping frame is in contact with the side surface at the outer diameter of the steel sheet.

4. The flywheel shock absorber with integrated multi-stage variable damping according to claim 1, characterized in that: The flywheel sub-assembly comprises a gear ring and a flywheel, the gear ring and the flywheel are assembled by shrink fitting or welding, and the outer ring of the flywheel is provided with rivet holes for assembling with the shock absorber sub-assembly.

5. The flywheel shock absorber with integrated multi-stage variable damping according to claim 1, characterized in that: The shock absorber subassembly includes a pre-vibration damping part and a main vibration damping damping part. The damping ring, disc spring seat and disc spring realize the basic damping part of the main vibration damping. The multi-stage variable damping subassembly realizes the variable damping part of the main vibration damping damping part.

6. The flywheel shock absorber with integrated multi-stage variable damping according to claim 5, characterized in that: The shaft sleeve plate of the shock absorber subassembly always drives the basic damping part to work during the process of compressing the large spring and the small spring. A driving angle is provided at the outer diameter of the shaft sleeve plate, and the side surface of the driving angle is in contact with the driving surface on the damping frame, thereby driving the multi-stage variable damping subassembly to work.

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