Shock absorber
By using variable stiffness recovery springs in the vibration damper, the stiffness is automatically adjusted to cope with the impact of variable working conditions, the problem of poor recovery performance of existing vibration dampers is solved, and better buffering and vibration damping effect and vehicle comfort are achieved.
Patent Information
- Application Number
- CN202421840510.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Due to the fixed recovery spring stiffness of existing vibration dampers, they cannot cope with the impact of varying working conditions, resulting in poor recovery performance, affecting the comfort and smoothness of the entire vehicle.
The variable stiffness recovery spring is used to automatically adjust the stiffness through changes in wire diameter, outer diameter and pitch to adapt to different loads and working conditions.
Provide better buffering and vibration damping effect under changing impact loads and variable working conditions, improve vehicle smoothness and comfort, and extend the service life of the shock absorber.
Smart Images
Figure CN223019291U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts, in particular to a shock absorber. Background Art
[0002] Shock absorbers are important components in the automobile suspension system, used to absorb impact from the road and suppress vehicle body vibration, thereby improving the smoothness and comfort of the vehicle's ride.
[0003] The shock absorber is mainly composed of a working cylinder, a guide seat assembled at the end of the working cylinder, a piston rod passing through the guide seat and extending into the working cylinder, a restoring spring sleeved on the piston rod, etc. When the wheel jumps up, the piston rod performs a restoring motion, at which time the restoring spring is compressed and hits the guide seat, playing a buffering role.
[0004] The current shock absorber cannot cope with the impact of variable working conditions due to the fixed stiffness of the restoring spring, resulting in poor restoring performance of the shock absorber, which in turn affects the comfort and smoothness of the entire vehicle.
[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0006] In view of this, the utility model provides a shock absorber with a variable stiffness restoring spring, which can automatically adjust the stiffness when subjected to different loads, flexibly respond to the impact of changing working conditions, adapt to the variable loads under changing working conditions, and provide better buffering and vibration reduction effects under changing impact loads and changing working conditions, thereby improving the smoothness and comfort of the entire vehicle.
[0007] One aspect of the utility model provides a shock absorber, comprising a working cylinder, a guide seat mounted on the end of the working cylinder, a piston rod passing through the guide seat and extending into the working cylinder, and also comprising: a variable stiffness return spring, which is sleeved on the piston rod and located in the working cylinder, and the two ends of the variable stiffness return spring are respectively fixedly connected to the piston rod and the guide seat; wherein the variable stiffness return spring has a variety of wire diameters, and / or the variable stiffness return spring has a variety of outer diameters, and / or the variable stiffness return spring has a variety of pitches; as the piston rod performs a restoring motion, the variable stiffness return spring is compressed and can provide a stiffness of 20N / mm to 50N / mm.
[0008] In some embodiments, the wire diameters at both ends of the variable stiffness return spring are larger than the wire diameter in the middle section of the variable stiffness return spring, and the outer diameters at both ends of the variable stiffness return spring are larger than the outer diameter in the middle section of the variable stiffness return spring.
[0009] In some embodiments, the wire diameter of the end of the variable stiffness return spring is 6 mm, and the wire diameter of the middle section of the variable stiffness return spring is 4 mm; wherein, the wire diameter of the variable stiffness return spring gradually changes from the end to the middle section, or, the wire diameter of the variable stiffness return spring changes in units of spiral turns.
[0010] In some embodiments, the gap between the end of the variable stiffness return spring and the inner wall of the working cylinder is 1 mm to 2 mm, and the gap between the middle section of the variable stiffness return spring and the inner wall of the working cylinder is 4 mm to 5 mm; wherein the outer diameter of the variable stiffness return spring varies in units of the number of spiral turns.
[0011] In some embodiments, the pitches at both ends of the variable stiffness return spring are smaller than the pitch of the middle section of the variable stiffness return spring.
[0012] In some embodiments, the pitch of the end of the variable stiffness return spring is 2 mm to 3 mm, and the pitch of the middle section of the variable stiffness return spring is 6 mm to 8 mm; wherein the pitch of the variable stiffness return spring varies in units of spiral turns.
[0013] In some embodiments, mounting seats are provided at both ends of the variable stiffness return spring, and the variable stiffness return spring is respectively welded to the guide seat and the piston rod through the mounting seats.
[0014] In some embodiments, the mounting seat is bowl-shaped, the end of the variable stiffness return spring is embedded in and fixed to the inner wall of the mounting seat, and the bottom of the mounting seat is welded to the piston rod and the guide seat.
[0015] Compared with the prior art, the beneficial effects of the present invention include at least:
[0016] The shock absorber with a variable stiffness restoring spring provided by the utility model can automatically adjust the stiffness when subjected to different loads, flexibly respond to the impact of changing working conditions, adapt to the variable loads under changing working conditions, and provide better buffering and vibration reduction effects under changing impact loads and changing working conditions, thereby improving the restoring performance of the shock absorber and thereby improving the smoothness and comfort of the entire vehicle.
[0017] The variable stiffness restoring spring specifically changes the stiffness by changing the wire diameter and / or pitch and / or outer diameter; during the restoring movement of the piston rod, the variable stiffness restoring spring is compressed and hits the guide seat until it is compressed to the limit displacement state. During the compression process, the variable stiffness restoring spring can provide a stiffness of 20N / mm to 50N / mm, which can not only flexibly respond to the impact of variable working conditions, adapt to the variable loads under variable working conditions, and improve the buffering and vibration reduction effect of the shock absorber in the restoring condition, but also effectively absorb the impact energy, protect the guide seat and other parts, and improve the stability and service life of the shock absorber.
[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in accordance with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.
[0020] Figure 1 Showing a schematic structural view of a shock absorber in an embodiment of the present utility model;
[0021] Figure 2 Showing a schematic structural view of a variable stiffness rebound spring in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model will be more complete and comprehensive, and the concept of the example embodiments will be fully conveyed to those skilled in the art.
[0023] The drawings are only schematic illustrations of the present utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and thus repeated descriptions thereof will be omitted.
[0024] The terms "first", "second" and similar terms used in the specific description do not denote any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by terms such as "upper", "lower" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. The meaning of the term "a plurality" is two or more, unless otherwise specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.
[0025] It should be noted that, without conflict, the embodiments of the present utility model and the features in different embodiments can be combined with each other.
[0026] Figure 1The structure of the vibration damper in the embodiment of the utility model is shown in FIG. Figure 2 The structure of the variable stiffness restoring spring in the embodiment of the utility model is shown in FIG. Figure 1 and Figure 2 The shapes and structures of the components of the shock absorber and the variable stiffness return spring are only for illustration, and are not intended to limit the present invention. The structural features of the shock absorber and the variable stiffness return spring of the present invention shall be subject to the following description.
[0027] Combination Figure 1 and Figure 2 As shown, the shock absorber provided by the embodiment of the utility model includes:
[0028] A working cylinder 10, a guide seat 20 assembled at the end of the working cylinder 10, and a piston rod 30 extending into the working cylinder 10 through the guide seat 20;
[0029] The variable stiffness restoring spring 40 is sleeved on the piston rod 30 and is located in the working cylinder 10. The two ends of the variable stiffness restoring spring 40 are fixedly connected to the piston rod 30 and the guide seat 20 respectively.
[0030] Wherein, the variable stiffness return spring 40 has a variety of wire diameters, and / or, the variable stiffness return spring 40 has a variety of pitches, and / or, the variable stiffness return spring 40 has a variety of outer diameters;
[0031] As the piston rod 30 performs restoring motion along the axial direction “Z”, the variable stiffness restoring spring 40 is compressed and can provide a stiffness of 20 N / mm to 50 N / mm.
[0032] The stiffness of the variable stiffness return spring 40 is the ratio of the load increment to the deformation increment, that is, the load required to produce a unit deformation, reflecting the degree of deformation of the variable stiffness return spring 40 when subjected to force. The variable stiffness return spring 40 has different stiffness under different loads. The wire diameter of the variable stiffness return spring 40 refers to the diameter of the steel wire used to manufacture the variable stiffness return spring 40. The larger the wire diameter of the variable stiffness return spring 40, the greater its stiffness is generally, so that it can withstand a larger load without deformation; the smaller the wire diameter of the variable stiffness return spring 40, the smaller its stiffness is generally, so that it can maintain good elastic properties even under light load conditions. The outer diameter of the variable stiffness return spring 40 is the maximum outer diameter of the variable stiffness return spring 40, and the stiffness of the variable stiffness return spring 40 is inversely correlated with its outer diameter. The pitch of the variable stiffness return spring 40 refers to the axial distance between corresponding points of two adjacent turns on the median diameter. The pitch determines the compression amount of the variable stiffness return spring 40 , affects the stress distribution of the variable stiffness return spring 40 , and indirectly affects the stiffness of the variable stiffness return spring 40 .
[0033] The shock absorber with a variable stiffness restoring spring 40 provided by the utility model can automatically adjust the stiffness when subjected to different loads, flexibly respond to the impact of changing working conditions, adapt to the variable loads under changing working conditions, and provide better buffering and vibration reduction effects under changing impact loads and changing working conditions, thereby improving the restoring performance of the shock absorber, and thereby improving the smoothness and comfort of the entire vehicle.
[0034] The variable stiffness restoring spring 40 specifically realizes the change of stiffness by changing the wire diameter and / or pitch and / or outer diameter; during the restoring movement of the piston rod 30, the variable stiffness restoring spring 40 is compressed and hits the guide seat 20 until it is compressed to the limit displacement state. During the compression process, the variable stiffness restoring spring 40 can provide a stiffness of 20N / mm to 50N / mm, which can not only flexibly respond to the impact of variable working conditions, adapt to the variable loads under variable working conditions, and improve the buffering and vibration reduction effect of the shock absorber in the restoring condition, but also effectively absorb the impact energy, protect the guide seat 20 and other parts, and improve the stability and service life of the shock absorber.
[0035] In some embodiments, the wire diameters of both ends of the variable stiffness return spring 40 (including the first end 40a connected to the guide seat 20 and the second end 40b connected to the piston rod 30) are larger than the wire diameter of the middle section 40c of the variable stiffness return spring 40, and the outer diameters of both ends of the variable stiffness return spring 40 (including the first end 40a and the second end 40b) are larger than the outer diameter of the middle section 40c of the variable stiffness return spring 40.
[0036] The middle section 40c refers to the midpoint of the variable stiffness restoring spring 40 along its height direction. In this embodiment, the wire diameter of the variable stiffness restoring spring 40 changes from the first end 40a to the middle section 40c, and then changes from the middle section 40c to the second end 40b, and the outer diameter of the variable stiffness restoring spring 40 changes from the first end 40a to the middle section 40c, and then changes from the middle section 40c to the second end 40b. The variable stiffness restoring spring 40 designed in this way can adjust the overall stiffness change with the load change, and is particularly suitable for the working condition of the tire jumping limit, and can well delay the road impact, quickly reduce the vehicle body acceleration caused by the road impact, and adjust the driving comfort.
[0037] In some specific applications, the wire diameters of the first end 40a and the second end 40b of the variable stiffness return spring 40 are 6 mm, and the wire diameter of the middle section 40c is 4 mm; wherein the wire diameter of the variable stiffness return spring 40 gradually changes from the end portions (including the first end 40a and the second end 40b) to the middle section 40c, or the wire diameter of the variable stiffness return spring 40 changes in units of the number of spiral turns.
[0038] The wire diameter of the variable stiffness restoring spring 40 gradually changes from the ends (including the first end 40a and the second end 40b) to the middle section 40c. For example, starting from a wire diameter of 6 mm at the first end 40a / the second end 40b, the wire diameter decreases by a set value (the set value can be set as needed) every unit length (the unit length can be set as needed), until it decreases to a wire diameter of 4 mm at the middle section 40c. The wire diameter of the variable stiffness restoring spring 40 changes in units of the number of helical turns. For example, starting from a wire diameter of 6 mm at the first end 40a / the second end 40b, the wire diameter decreases by a set value (the set value can be set as needed) per turn, until it decreases to a wire diameter of 4 mm at the middle section 40c.
[0039] In some specific applications, the clearance between the ends (including the first end 40a and the second end 40b) of the variable stiffness restoring spring 40 and the inner wall of the working cylinder 10 is 1 mm to 2 mm, and the clearance between the middle section 40c of the variable stiffness restoring spring 40 and the inner wall of the working cylinder 10 is 4 mm to 5 mm; among them, the outer diameter of the variable stiffness restoring spring 40 changes in units of the number of helical turns.
[0040] The outer diameter of the variable stiffness restoring spring 40 changes in units of the number of helical turns. For example, starting from a clearance of 1 mm between the first end 40a / the second end 40b and the inner wall of the working cylinder 10, the outer diameter decreases by a preset value (the preset value can be set as needed) per turn so that the clearance between this turn and the inner wall of the working cylinder 10 increases by 1 / 2 of the preset value, until it changes to a clearance of 5 mm between the middle section 40c and the inner wall of the working cylinder 10.
[0041] In some embodiments, the pitch of the two ends (including the first end 40a and the second end 40b) of the variable stiffness restoring spring 40 is smaller than the pitch of the middle section 40c of the variable stiffness restoring spring 40.
[0042] In this embodiment, on the basis that the variable stiffness restoring spring 40 has multiple wire diameters and multiple outer diameters, the pitch of the variable stiffness restoring spring 40 can be further changed so that the variable stiffness restoring spring 40 can better cope with the working conditions of the tire's upward jump limit and adjust the driving comfort.
[0043] In some specific applications, the pitch of the ends (including the first end 40a and the second end 40b) of the variable stiffness restoring spring 40 is 2 mm to 3 mm, and the pitch of the middle section 40c of the variable stiffness restoring spring 40 is 6 mm to 8 mm; among them, the pitch of the variable stiffness restoring spring 40 changes in units of the number of helical turns.
[0044] The pitch of the variable stiffness restoring spring 40 changes in units of the number of helical turns. For example, starting from a pitch of 2 mm between two adjacent turns at the first end 40a / the second end 40b, the pitch between every two adjacent turns increases by a predetermined value (the predetermined value can be set as needed), until it increases to a pitch of 7 mm between two adjacent turns at the middle section 40c.
[0045] Furthermore, in some embodiments, mounting seats 50 are provided at both ends (including the first end 40a and the second end 40b) of the variable stiffness restoring spring 40, and the variable stiffness restoring spring 40 is welded to the guide seat 20 and the piston rod 30 respectively through the mounting seats 50.
[0046] By welding the mounting seats 50 to the guide seat 20 and the piston rod 30, the first end 40a and the second end 40b of the variable stiffness restoring spring 40 are firmly connected to the guide seat 20 and the piston rod 30, thereby ensuring that the variable stiffness restoring spring 40 can flexibly respond to the impact of variable working conditions, adapt to the variable loads under variable working conditions, improve the buffer and vibration reduction effect of the shock absorber in the restoring working condition, effectively absorb the impact energy, protect the guide seat 20 and other parts, and improve the stability and service life of the shock absorber.
[0047] In some embodiments, the mounting seat 50 is bowl-shaped, the first end 40a and the second end 40b of the variable stiffness restoring spring 40 are embedded and fixed in the inner wall of the mounting seat 50, and the bottom of the mounting seat 50 is welded to the piston rod 30 and the guide seat 20. In this way, a firm connection among the first end 40a / second end 40b of the variable stiffness restoring spring 40, the mounting seat 50, and the guide seat 20 / piston rod 30 is achieved.
[0048] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.
Claims
1. A shock absorber, comprising a working cylinder, a guide seat mounted at the end of the working cylinder, and a piston rod extending into the working cylinder through the guide seat, characterized in that: Also includes: A variable stiffness restoring spring is sleeved on the piston rod and located in the working cylinder, and two ends of the variable stiffness restoring spring are fixedly connected to the piston rod and the guide seat respectively; Wherein, the variable stiffness return spring has a variety of wire diameters, and / or, the variable stiffness return spring has a variety of outer diameters, and / or, the variable stiffness return spring has a variety of pitches; As the piston rod performs a restoring motion, the variable stiffness restoring spring is compressed and can provide a stiffness of 20 N / mm to 50 N / mm.
2. The shock absorber according to claim 1, characterized in that The wire diameters at both ends of the variable stiffness return spring are larger than the wire diameter at the middle section of the variable stiffness return spring, and the outer diameters at both ends of the variable stiffness return spring are larger than the outer diameter at the middle section of the variable stiffness return spring.
3. The shock absorber according to claim 2, characterized in that The wire diameter of the end of the variable stiffness restoring spring is 6 mm, and the wire diameter of the middle section of the variable stiffness restoring spring is 4 mm; Wherein, the wire diameter of the variable stiffness restoring spring changes gradually from the end to the middle section, or the wire diameter of the variable stiffness restoring spring changes in units of spiral turns.
4. The vibration absorber according to claim 2, characterized in that The gap between the end of the variable stiffness restoring spring and the inner wall of the working cylinder is 1 mm to 2 mm, and the gap between the middle section of the variable stiffness restoring spring and the inner wall of the working cylinder is 4 mm to 5 mm; Wherein, the outer diameter of the variable stiffness restoring spring changes in units of the number of spiral turns.
5. The shock absorber according to claim 1, characterized in that The pitches at both ends of the variable stiffness return spring are smaller than the pitch of the middle section of the variable stiffness return spring.
6. The vibration absorber according to claim 5, characterized in that The pitch of the end of the variable stiffness restoring spring is 2 mm to 3 mm, and the pitch of the middle section of the variable stiffness restoring spring is 6 mm to 8 mm; Wherein, the pitch of the variable stiffness restoring spring changes in units of the number of spiral turns.
7. The shock absorber according to claim 1, characterized in that Mounting seats are arranged at both ends of the variable stiffness restoring spring, and the variable stiffness restoring spring is respectively welded to the guide seat and the piston rod through the mounting seats.
8. The vibration absorber according to claim 7, characterized in that The mounting seat is bowl-shaped, the end of the variable stiffness restoring spring is embedded in and fixed to the inner wall of the mounting seat, and the bottom of the mounting seat is welded to the piston rod and the guide seat.