Buffer bearing assembly and shock absorber
By setting an annular groove at the end of the elastic buffer member of the vibration damper and setting an annular buckle on the inner wall of the annular cavity, the effect of preventing the elastic buffer member from falling out when the vibration damper has a slant angle is achieved, and the problem of elastic buffer member being pulled out in the non-axial motion of the vibration damper is solved, ensuring the normal operation of the vibration damper and the performance and life of the elastic buffer member are ensured.
Patent Information
- Application Number
- CN202421797330.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-26
AI Technical Summary
During the operation, the vibration damper is prone to non-axial movement such as tilt and slant, causing the elastic buffer to break out of the annular cavity of the support, causing impact noise, weakening the performance and life of the elastic buffer, and affecting the normal operation of the vibration damper.
By providing an annular groove at the end of the elastic buffer member, a protruding annular buckle is provided on the inner wall of the annular cavity, the annular buckle is intersected with the annular groove, ensuring a stable cooperation between the elastic buffer member and the annular cavity to prevent detachment.
Effectively prevent the elastic buffer from falling out when the vibration damper has a slant angle, ensuring its buffering performance and service life, avoiding noise, and ensuring the normal operation of the vibration damper.
Smart Images
Figure CN222798041U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shock absorbers, in particular to a buffer support assembly and a shock absorber. Background Art
[0002] During the operation of the shock absorber, the piston rod that passes through the support and extends into the working cylinder moves back and forth along the axial direction, driving the elastic buffer assembled on the piston rod to stretch and compress. The end of the elastic buffer is embedded in the annular cavity of the support; under normal circumstances, the elastic buffer is connected to the annular cavity and the piston rod respectively, and stable stretching and compression are achieved under the limiting action of the annular cavity and the piston rod.
[0003] However, non-axial movements such as tilting and yaw often occur during the operation of the shock absorber. At this time, the elastic buffer is easy to escape from the annular cavity of the support, which not only generates impact noise, but also weakens the performance and life of the elastic buffer, affecting the normal operation of the shock absorber.
[0004] 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
[0005] In view of this, the utility model provides a buffer support assembly and a shock absorber, in which the end of the elastic buffer is inserted into the annular cavity through interference, and a raised annular buckle is provided on the inner wall of the annular cavity, and an annular groove is provided at the end of the elastic buffer, so that the annular buckle is interference-engaged with the annular groove, so that even when the shock absorber has a swing angle, the elastic buffer can be effectively prevented from escaping from the annular cavity, thereby ensuring the buffering performance and service life of the elastic buffer, avoiding noise, and ensuring the normal operation of the shock absorber.
[0006] According to one aspect of the utility model, a buffer support assembly is provided, comprising a support member having an annular cavity, a piston rod extending through the support member, and an elastic buffer member assembled on the piston rod and with its end embedded in the annular cavity, wherein: the end of the elastic buffer member is embedded in the annular cavity with an interference fit; the inner wall of the annular cavity is provided with a raised annular buckle portion, the end of the elastic buffer member is provided with an annular groove, and the annular buckle portion is interference fit with the annular groove.
[0007] In some embodiments, as the piston rod stretches and compresses, the elastic buffer stretches and compresses, and the annular buckle portion always at least partially engages with the annular groove.
[0008] In some embodiments, the height of the annular cavity along the axial direction does not exceed 20% of the height of the support member along the axial direction.
[0009] In some embodiments, the inner diameter of the annular cavity is smaller than the outer diameter of the end of the elastic buffer.
[0010] In some embodiments, a thickness of the annular buckle portion along the radial direction is greater than a depth of the annular groove along the radial direction.
[0011] In some embodiments, the annular buckle portion is axisymmetric relative to a central axis of the support member.
[0012] In some embodiments, the annular buckle portion has an arc surface and is transitionally connected to the rounded corner of the inner wall of the annular cavity.
[0013] In some embodiments, the inner angle of the annular cavity is formed as an arc angle.
[0014] In some embodiments, the main body of the elastic buffer is wavy.
[0015] According to another aspect of the utility model, a shock absorber is provided, wherein the shock absorber is equipped with the buffer support assembly as described in any of the above embodiments.
[0016] Compared with the prior art, the beneficial effects of the present invention include at least:
[0017] The utility model embeds the end of the elastic buffer into the annular cavity through interference fit, so that the elastic buffer and the annular cavity maintain an overall interference fit and stable fit; by arranging a raised annular buckle portion on the inner wall of the annular cavity and an annular groove at the end of the elastic buffer, so that the annular buckle portion is interference-fitted with the annular groove, the anti-slip strength of the fit between the elastic buffer and the annular cavity is strengthened, and even when the shock absorber has a swing angle, due to the interference-fitting relationship between the annular buckle portion and the annular groove, it is difficult for the end of the elastic buffer to slip out of the annular cavity, thereby effectively preventing the elastic buffer from falling off, ensuring the buffering performance and service life of the elastic buffer, avoiding noise, and ensuring the normal operation of the shock absorber.
[0018] The utility model improves the problem that the elastic buffer component is easy to loosen when the deflection angle is large by means of interference fit between the elastic buffer component and the annular cavity and interference fit between the annular buckle portion and the annular groove, which does not increase additional costs and can effectively solve the assembly problem.
[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A schematic structural diagram of a buffer support assembly in an embodiment of the utility model is shown. DETAILED DESCRIPTION
[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.
[0023] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted.
[0024] In the specific description, the orientation or position relationship indicated by the terms "axial", "radial", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, 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, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.
[0026] Figure 1 The structure of the buffer support assembly in the embodiment of the utility model is shown schematically, referring to Figure 1 As shown, the buffer support assembly provided by the embodiment of the utility model includes:
[0027] A support member 10 having an annular cavity 11, a piston rod 20 extending through the support member 10, and an elastic buffer member 30 mounted on the piston rod 20 and having an end 30a embedded in the annular cavity 11, wherein:
[0028] The end portion 30a of the elastic buffer 30 is inserted into the annular cavity 11 through interference fit;
[0029] The inner wall of the annular cavity 11 is provided with a raised annular buckle portion 110 , and the end portion 30 a of the elastic buffer 30 is provided with an annular groove 330 , and the annular buckle portion 110 is interference-engaged with the annular groove 330 .
[0030] The utility model embeds the end 30a of the elastic buffer 30 into the annular cavity 11 through interference, so that the elastic buffer 30 and the annular cavity 11 maintain an interference stable fit as a whole; by arranging a raised annular buckle 110 on the inner wall of the annular cavity 11 and an annular groove 330 at the end 30a of the elastic buffer 30, and making the annular buckle 110 interfere with the annular groove 330, the anti-slip strength of the fit between the elastic buffer 30 and the annular cavity 11 is strengthened, so that even when the shock absorber has a swing angle, due to the interference fit between the annular buckle 110 and the annular groove 330, it is difficult for the end 30a of the elastic buffer 30 to slip out of the annular cavity 11, thereby effectively preventing the elastic buffer 30 from falling off, ensuring the buffering performance and service life of the elastic buffer 30, avoiding noise, and ensuring the normal operation of the shock absorber.
[0031] The utility model improves the problem that the elastic buffer 30 is easy to loosen when the deflection angle is large by means of interference fit between the elastic buffer 30 and the annular cavity 11 and interference fit between the annular buckle portion 110 and the annular groove 330, which does not increase additional costs and can effectively solve the assembly problem.
[0032] In some embodiments, as the piston rod 20 stretches and compresses, the elastic buffer 30 stretches and compresses, and the annular buckle portion 110 always at least partially engages the annular groove 330 .
[0033] Under normal circumstances, the end 30 a of the elastic buffer 30 is stably embedded in the annular cavity 11 , and the elastic buffer 30 achieves stable stretching and compression under the limiting action of the annular cavity 11 and the piston rod 20 .
[0034] When the shock absorber undergoes non-axial movements such as tilting and yaw, causing the elastic buffer 30 to be subjected to an inclination angle, due to the interference fit between the annular buckle 110 and the annular groove 330, the annular buckle 110 of the annular cavity 11 tightly holds the annular groove 330 of the elastic buffer 30 to prevent the elastic buffer 30 from falling off; even if a part of the elastic buffer 30 falls out, the remaining part of the annular groove 330 will be stuck by the corresponding part of the annular buckle 110 to prevent it from falling off. When the piston rod 20 enters the next compression stroke, the end 30a of the part of the elastic buffer 30 that has fallen out can be pressed into the annular cavity 11 again, so that the annular buckle 110 and the annular groove 330 can resume the overall interference fit state.
[0035] In some embodiments, the height of the annular cavity 11 along the axial direction Z does not exceed 20% of the height of the support 10 along the axial direction Z.
[0036] The main cavity 40 of the support member 10 is used to accommodate the rubber bushing assembly. The height design of the annular cavity 11 ensures that the annular cavity 11 can stably hold the end 30a of the elastic buffer 30 while avoiding affecting the structural strength of the main part of the support member 10.
[0037] Specifically, the height of the annular cavity 11 is set to, for example, 5%, 8%, 10%, 15%, 20%, etc., of the height of the support 10 .
[0038] In addition, an end cover 50 is provided at the end of the main body portion of the support member 10 , and the end cover 50 is used to limit the rubber bushing assembly in the main body cavity 40 of the support member 10 .
[0039] In some embodiments, the inner diameter of the annular cavity 11 is smaller than the outer diameter of the end 30 a of the elastic buffer 30 , and the inner diameter of the annular cavity 11 is at least 2% smaller than the outer diameter of the end 30 a of the elastic buffer 30 .
[0040] The inner diameter of the annular cavity 11 is smaller than the outer diameter of the end 30a of the elastic buffer 30, so that the end 30a of the elastic buffer 30 is interference fit into the annular cavity 11; the inner diameter of the annular cavity 11 is at least 2% smaller than the outer diameter of the end 30a of the elastic buffer 30, which can ensure the interference fit strength between the end 30a of the elastic buffer 30 and the annular cavity 11.
[0041] Specifically, the inner diameter of the annular cavity 11 is set to, for example, 98%, 96%, 90%, etc., of the outer diameter of the end portion 30 a of the elastic buffer 30 .
[0042] In some embodiments, the thickness of the annular buckle 110 along the radial direction X is greater than the depth of the annular groove 330 along the radial direction X, and the thickness of the annular buckle 110 along the radial direction X is at most 5% greater than the depth of the annular groove 330 along the radial direction X.
[0043] The thickness of the annular buckle portion 110 is greater than the depth of the annular groove 330, so that the annular buckle portion 110 is interference-fitted with the annular groove 330; the thickness of the annular buckle portion 110 is at most 5% greater than the depth of the annular groove 330, which not only ensures the interference fit strength between the annular buckle portion 110 and the annular groove 330, but also avoids affecting the assembly of the annular groove 330 and the annular buckle portion 110.
[0044] Specifically, the thickness of the annular buckle portion 110 is set to, for example, 102%, 103%, 105%, etc., of the depth of the annular groove 330 .
[0045] In some embodiments, the annular buckle 110 is axially symmetrical with respect to the central axis of the support 10. The annular buckle 110 is formed as an axially symmetrical buckle ring, which can evenly and stably buckle and hold the annular groove 330 in the circumferential direction to achieve stable cooperation between the end 30a of the elastic buffer 30 and the annular cavity 11.
[0046] In some embodiments, the annular buckle portion 110 has an arc surface and is transitionally connected with the rounded corner of the inner wall of the annular cavity 11. In this way, the annular buckle portion 110 has no gaps in the circumferential direction, has a smooth surface, is easy to be pressed into the annular groove 330, and avoids sharp contact between the annular buckle portion 110 and the elastic buffer 30 to damage the elastic buffer 30.
[0047] The annular buckle portion 110 can be specifically formed into a sphere, and preferably a sphere that exceeds a hemisphere, and the annular groove 330 is correspondingly formed into a spherical groove that exceeds a hemisphere; in this way, the interference fit between the annular buckle portion 110 and the annular groove 330 is utilized to ensure that the end 30a of the elastic buffer 30 is tightly fitted with the annular cavity 11, thereby preventing the elastic buffer 30 from falling off.
[0048] In some embodiments, the inner angle of the annular cavity 11 is formed as a rounded angle, so as to avoid sharp contact between the annular cavity 11 and the elastic buffer 30 and thus avoid damaging the elastic buffer 30 .
[0049] In some embodiments, the main body 30b of the elastic buffer 30 is wavy. In this way, the elastic buffer 30 has good tensile and compressive properties, and is easy to deform and recover. The specific parameters of the main body 30b, such as the wave height along the radial direction X, the wave distance along the axial direction Z, etc., can be determined according to the vibration damping and buffering requirements of the shock absorber.
[0050] The embodiment of the utility model further provides a shock absorber, which is equipped with a buffer support assembly as described in any of the above embodiments, and can achieve the following beneficial effects:
[0051] The end 30a of the elastic buffer 30 is inserted into the annular cavity 11 through interference fit, so that the elastic buffer 30 and the annular cavity 11 maintain an overall interference fit and stability; by arranging a raised annular buckle 110 on the inner wall of the annular cavity 11 and arranging an annular groove 330 at the end 30a of the elastic buffer 30, and making the annular buckle 110 interfere with the annular groove 330, the anti-slip force between the elastic buffer 30 and the annular cavity 11 is strengthened, so that even when the shock absorber has a swing angle, due to the interference fit between the annular buckle 110 and the annular groove 330, it is difficult for the end 30a of the elastic buffer 30 to fall out of the annular cavity 11, thereby effectively preventing the elastic buffer 30 from falling off, ensuring the buffering performance and service life of the elastic buffer 30, avoiding noise, and ensuring the normal operation of the shock absorber.
[0052] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A buffer support assembly, comprising a support member having an annular cavity, a piston rod extending through the support member, and an elastic buffer member mounted on the piston rod and having an end portion embedded in the annular cavity, characterized in that: The end of the elastic buffer is inserted into the annular cavity through interference fit; The inner wall of the annular cavity is provided with a raised annular buckle portion, the end of the elastic buffer is provided with an annular groove, and the annular buckle portion is interference-fastened with the annular groove.
2. The buffer support assembly according to claim 1, characterized in that: As the piston rod stretches and compresses, the elastic buffer member stretches and compresses, and the annular buckle portion always at least partially engages with the annular groove.
3. The buffer support assembly according to claim 1, characterized in that: The height of the annular cavity in the axial direction does not exceed 20% of the height of the support member in the axial direction.
4. The buffer support assembly according to claim 1, characterized in that: The inner diameter of the annular cavity is smaller than the outer diameter of the end portion of the elastic buffer.
5. The buffer support assembly according to claim 1, characterized in that: A thickness of the annular buckle portion in a radial direction is greater than a depth of the annular groove in the radial direction.
6. The buffer support assembly according to claim 1, characterized in that: The annular buckle portion is axisymmetric relative to the central axis of the support member.
7. The buffer support assembly according to claim 1, characterized in that: The annular buckle portion has an arc surface and is transitionally connected with the inner wall fillet of the annular cavity.
8. The buffer support assembly according to claim 1, characterized in that: The inner angle of the annular cavity is formed as an arc angle.
9. The buffer support assembly according to claim 1, characterized in that: The main body of the elastic buffer is wavy.
10. A shock absorber, characterized in that: The shock absorber is equipped with a buffer support assembly as described in any one of claims 1-9.