Cap member for automobile shock absorber and automobile shock absorber
By designing the cap member for automotive shock absorbers, including the cap body and piston rod buffer, the problem of piston rod bending when the shock absorber is subjected to lateral force is solved, and the ability of the piston rod to resist bending is enhanced, and the working fluid leakage is avoided.
Patent Information
- Application Number
- CN202421250113.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
When the shock absorber is subjected to a large lateral force, the piston rod is prone to bend, causing the working fluid in the cylinder to leak out, which in turn causes the shock absorber to fail.
A cap member for automobile shock absorbers is designed, including a cap body and a piston rod buffer member. The piston rod buffer member is connected to the bottom of the cap body and surrounds the piston rod. The piston rod is supported by the piston rod buffer member, which increases the length of the fulcrum that resists bending.
When subjected to large lateral forces, the support of the piston rod buffer reduces the risk of bending of the piston rod, avoids leakage of working fluid, and ensures the normal operation of the shock absorber.
Smart Images
Figure CN222633723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a cap component for an automobile shock absorber and the automobile shock absorber. Background Art
[0002] Currently, conventional vehicles use various suspensions to improve handling performance or ride comfort. In particular, a suspension (shock absorber) combined with a spring is used between the wheel and the vehicle body to absorb vibration or impact.
[0003] Generally, the shock absorber includes a cylinder filled with working fluid, a cap member covering one end of the cylinder, a piston embedded in the cylinder via the cap member, and a dust cover jacketed on the piston rod of the piston and the outer side of the cap member. In addition, the interior of the cylinder of the shock absorber is divided into an upper chamber and a lower chamber by a piston having a flow valve and an extension valve. An oil storage cylinder is formed at the lower end of the cylinder, and the oil storage cylinder is connected to the lower chamber via a partition having a compression valve and a compensation valve.
[0004] The shock absorber achieves shock absorption in the following way.
[0005] When the piston rod of the shock absorber is compressed, the piston moves downward, the volume of the upper chamber increases, the volume of the lower chamber decreases, the circulation valve opens, and the oil in the lower chamber enters the upper chamber through the circulation valve; at the same time, the compression valve opens and part of the oil enters the oil storage cylinder. The throttling effect of these two valves on the oil causes the shock absorber to produce a damping effect during compression movement.
[0006] In addition, when the piston rod of the shock absorber is stretched, the piston moves upward, the volume of the upper chamber decreases and the volume of the lower chamber increases, the extension valve opens, and the oil in the upper chamber enters the lower chamber through the extension valve; at the same time, the compensation valve opens, and part of the oil enters the lower chamber from the oil storage cylinder. The throttling effect of these two valves on the oil causes the shock absorber to produce a damping effect during the extension movement.
[0007] For shock absorbers, when the shock absorber is subjected to a large lateral force, the shock absorber's piston rod is prone to bending. When the piston rod bends, a gap will be generated between the piston rod and the cylinder body, causing the working fluid in the cylinder body to leak out of the gap, so that the shock absorber leaks oil and fails. In the past, this problem was usually alleviated by increasing the outer diameter of the piston rod, but the selection of the piston rod is limited by the vehicle model, and the ability of the piston rod outer diameter to resist lateral force is limited. Therefore, how to prevent the piston rod from bending has become an urgent problem to be solved in this field. Utility Model Content
[0008] The utility model is proposed in view of the above problems, and its purpose is to provide a cap member for an automobile shock absorber capable of preventing the piston rod of the shock absorber from bending, and an automobile shock absorber having the cap member for the automobile shock absorber.
[0009] In order to achieve the above-mentioned purpose, the utility model provides a cap component for an automobile shock absorber, which is connected to one end of a base shell of the automobile shock absorber. The cap component for the automobile shock absorber includes a cap body and a piston rod buffer. The cap body is formed into a bottomed cylindrical shape, and the piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber.
[0010] According to the cap component for automobile shock absorber of the utility model, it includes a cap body and a piston rod buffer. The cap body is formed into a bottomed cylinder. The piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber. Therefore, when the piston rod of the automobile shock absorber receives lateral force, the piston rod is supported by the piston rod buffer, and the fulcrum length for resisting bending is increased, so that the force of the shock absorber is dispersed when it is subjected to a large lateral force, thereby enhancing the ability of the piston rod to resist bending, and avoiding the problem of failure of the shock absorber due to the working fluid in the cylinder flowing out of the gap due to the bending of the piston rod.
[0011] Furthermore, in the automobile shock absorber cap member of the present invention, the piston rod buffer is formed in a cylindrical shape, and the coil spring is provided inside the cylindrical wall of the piston rod buffer.
[0012] In addition, in the cap member for an automobile shock absorber of the present invention, the piston rod buffer is made of at least one of polyurethane and rubber.
[0013] Furthermore, the cap member for an automobile shock absorber of the present invention further comprises a connector for connecting the piston rod buffer to the bottom of the cap body.
[0014] In addition, in the cap component for the automobile shock absorber of the utility model, an annular protrusion surrounding the piston rod of the automobile shock absorber is formed on the outer surface of the bottom of the cap body, and the annular protrusion is interference fit with the inner circumferential surface of the cylinder wall of the piston rod buffer, thereby connecting the piston rod buffer to the bottom of the cap body.
[0015] In addition, in the automobile shock absorber cap member of the present invention, the length of the piston rod buffer is 10 cm to 30 cm.
[0016] In addition, in the cap component for automobile shock absorber of the utility model, the inner diameter of the piston rod buffer is 12.5 mm to 25 mm, and the piston rod buffer and the piston rod are clearance-matched.
[0017] In addition, the utility model also provides an automobile shock absorber, comprising a base shell, any one of the above-mentioned cap components for automobile shock absorbers, and a piston embedded in the base shell via the cap component for automobile shock absorber.
[0018] To summarize, according to the utility model, the cap component for automobile shock absorber and the automobile shock absorber include a cap body and a piston rod buffer. The cap body is formed into a bottomed cylindrical shape, and the piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber. Therefore, when the piston rod of the automobile shock absorber receives a lateral force, the piston rod is supported by the piston rod buffer, thereby increasing the fulcrum length for resisting bending, so that the force of the shock absorber is dispersed when it is subjected to a large lateral force, thereby enhancing the ability of the piston rod to resist bending, and avoiding the problem of failure of the shock absorber due to the working fluid in the cylinder flowing out of the gap due to the bending of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the automobile shock absorber of the utility model.
[0020] Figure 2 It is a schematic diagram of the automobile shock absorber cap component of the utility model.
[0021] Figure 3 It is a schematic diagram of a piston rod buffer of a car shock absorber cap component of the utility model.
[0022] Figure 4 It is a schematic diagram of a cap body of a cap component of an automobile shock absorber of the utility model.
[0023] Figure 5 It is a schematic diagram of a connecting piece of a car shock absorber cap component of the utility model.
[0024] Figure 6 The utility model is a schematic diagram of the connection relationship between the piston rod buffer and the connecting member of the automobile shock absorber cap component. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described below with reference to the accompanying drawings. However, the automobile shock absorber cap member and automobile shock absorber disclosed in the following embodiments are only examples, and are not limited to the following embodiments as long as the effects of the present invention can be achieved.
[0026] Figure 1 It is a schematic diagram of the automobile shock absorber of the utility model. Figure 2 It is a schematic diagram of the automobile shock absorber cap component of the utility model, wherein the coil spring inside the piston rod buffer is shown, which is only for the convenience of illustrating the structure, and in fact the internal structure cannot be observed from the outside. Figure 3 It is a schematic diagram of a piston rod buffer of a car shock absorber cap component of the utility model. Figure 4 It is a schematic diagram of a cap body of a cap component of an automobile shock absorber of the utility model. Figure 5 It is a schematic diagram of a connecting piece of a car shock absorber cap component of the utility model. Figure 6The utility model is a schematic diagram of the connection relationship between the piston rod buffer and the connecting member of the automobile shock absorber cap component.
[0027] like Figure 1 As shown, the automobile shock absorber of this embodiment includes a cap member 100, a base shell 200 of the automobile shock absorber whose one end is covered by the cap member 100, and a piston embedded in the base shell 200, and a piston rod 300 of the piston extends from the cap member 100. In addition, the interior of the base shell 200 of the shock absorber is divided into an upper chamber and a lower chamber by the piston having a flow valve and an extension valve. An oil storage cylinder is formed at the lower end of the cylinder body, and the oil storage cylinder is connected to the lower chamber via a partition having a compression valve and a compensation valve (both are not shown).
[0028] In this embodiment, if Figures 2 to 5 As shown, the cap member 100 includes a cap body 110 and a piston rod buffer 120 . The cap body 110 is formed in a bottomed cylindrical shape. The piston rod buffer 120 is connected to a bottom 111 of the cap body 110 and surrounds the piston rod of the automobile shock absorber.
[0029] Specifically, if Figure 4 As shown, the cap body 110 of the cap member 100 is formed into a bottomed cylindrical shape, a flange 112 is formed at the open end of the cap body 110, and a through hole 113 for the piston rod to pass through is formed at the bottom 111 of the cap body 110. The cap body 110 is divided into multiple models to meet the requirements of different vehicles.
[0030] like Figure 3 and Figure 4 As shown, a piston rod buffer 120 is connected to the outer surface of the bottom 111 of the cap body 110. The piston rod buffer 120 is formed in a cylindrical shape, and a through hole 121 is formed in the length direction thereof, and can be sleeved on the outer peripheral surface of the piston rod of the shock absorber. The material of the piston rod buffer 120 is at least one of polyurethane and rubber. Of course, the shape of the piston rod buffer 120 is not limited to a cylindrical shape, and can also be formed into a square cylinder, a polygonal cylinder, or a cylinder with an irregular cross-section, as long as the inner peripheral surface can be sleeved on the outer peripheral surface of the piston rod of the shock absorber. In addition, the material of the piston rod buffer 120 is not limited to polyurethane and rubber, and can also be plastic and other materials, as long as it can play a buffering role on the lateral force of the piston rod.
[0031] like Figures 2 to 5 As shown, one end of the piston rod buffer 120 in the length direction is connected to the bottom 111 of the cap body 110, and the through hole 121 of the piston rod buffer 120 is connected to the through hole 113 of the bottom 111 of the cap body 110, so that the piston rod 300 can be inserted into the piston rod buffer 120 and the cap body 110 into the cylinder body.
[0032] like Figures 1 to 6As shown, the piston rod buffer 120 is connected to the bottom 111 of the cap body 110 through the connector 130. Specifically, the connector 130 is formed in a circular ring shape with a predetermined length, and a flange is formed at one end of the connector 130 in the circumferential direction, that is, the connector 130 is formed with a large diameter portion 131 and a small diameter portion 132. When the piston rod buffer 120 is connected to the bottom 111 of the cap body 110 through the connector 130, the small diameter portion 132 of the connector 130 is passed through the through hole 113 of the bottom 111 of the cap body 110 from the inside of the cap body 110, and the large diameter portion 131 abuts against the bottom 111 of the cap body 110. Then, the small diameter portion 132 passing through the through hole 113 of the cap body 110 is inserted into the through hole 121 of the piston rod buffer 120, and the outer peripheral surface of the small diameter portion 132 of the connecting member 130 is interference fit with the inner peripheral surface of the through hole 121 of the piston rod buffer 120, thereby connecting the piston rod buffer 120 to the bottom 111 of the cap body 110 through the connecting member 130.
[0033] In addition, the connecting member 130 may be omitted and an annular protrusion surrounding the piston rod of the automobile shock absorber may be formed on the outer surface of the bottom 111 of the cap body 110, and the annular protrusion may be interference-fitted with the inner circumference of the cylinder wall of the piston rod buffer 120, thereby connecting the piston rod buffer 120 to the bottom 111 of the cap body 110. In addition, the piston rod buffer 120 may be bonded to the bottom 111 of the cap body 110.
[0034] According to the above-mentioned cap component for the automobile shock absorber, it includes a cap body and a piston rod buffer. The cap body is formed into a bottomed cylindrical shape, and the piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber. Therefore, when the piston rod of the automobile shock absorber receives a lateral force, the piston rod is supported by the piston rod buffer, and the fulcrum length for resisting bending is increased, so that the force of the shock absorber is dispersed when it is subjected to a large lateral force, thereby enhancing the ability of the piston rod to resist bending, and avoiding the problem of failure of the shock absorber due to the working fluid in the cylinder flowing out of the gap due to the bending of the piston rod.
[0035] In addition, if Figure 3 As shown, the piston rod buffer 120 of the cap member 100 is formed into a cylindrical shape, and a coil spring 140 is arranged inside the cylinder wall of the piston rod buffer 120. The material of the spring can be a material commonly used for springs, such as spring steel and copper. The spring can be integrally formed inside the cylinder wall of the piston rod buffer 120 when the piston rod buffer 120 is formed by injection molding. Of course, the coil spring may not be arranged inside the piston rod buffer 120, as long as it can play a role in buffering the lateral force of the piston rod.
[0036] By arranging a spring in the piston rod buffer, it is possible to support and resist a larger lateral force when the piston rod is deflected by lateral force. At the same time, the entire buffer component can still be compressed when the shock absorber is running, and the piston rod buffer will not occupy the stroke required by the original buffer block.
[0037] In addition, the length of the piston rod buffer 120 is 10 cm to 30 cm. By forming such a length, the length of the fulcrum for resisting bending is increased, so that the force of the shock absorber is dispersed when subjected to a large lateral force, thereby enhancing the ability of the piston rod to resist bending. For example, the length of the piston rod buffer 120 can be 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, etc. Of course, the length of the piston rod buffer 120 is not limited to 10 cm to 30 cm, and can be formed into different lengths according to different models of shock absorbers, such as 40 cm, 50 cm, etc., as long as it can play a role in buffering the lateral force of the piston rod.
[0038] In addition, the inner diameter of the piston rod buffer 120 is formed to be 12.5 mm to 25 mm, and the piston rod buffer 120 and the piston rod are matched with each other in a clearance. For example, the inner diameter of the piston rod buffer 120 is 12.5 mm, 13 mm, 13.5 mm, 14 mm, 18 mm, 20 mm, 22 mm, 25 mm, etc. Of course, the inner diameter of the piston rod buffer 120 is not limited to 12.5 mm to 25 mm, and different inner diameters can be formed according to different models of shock absorbers, for example, 26 mm, 28 mm, 30 mm, etc., as long as the lateral force of the piston rod can be buffered.
[0039] To summarize, according to the utility model, the cap component for automobile shock absorber and the automobile shock absorber include a cap body and a piston rod buffer. The cap body is formed into a bottomed cylindrical shape, and the piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber. Therefore, when the piston rod of the automobile shock absorber receives a lateral force, the piston rod is supported by the piston rod buffer, thereby increasing the fulcrum length for resisting bending, so that the force of the shock absorber is dispersed when it is subjected to a large lateral force, thereby enhancing the ability of the piston rod to resist bending, and avoiding the problem of failure of the shock absorber due to the working fluid in the cylinder flowing out of the gap due to the bending of the piston rod.
[0040] Finally, it should be noted that the above implementation modes are only specific implementation modes of the present utility model, which are used to illustrate the technical solution of the present utility model, rather than to limit it, and the protection scope of the present utility model is not limited to this. Although the present utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein. These modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be included in the protection scope of the present utility model.
Claims
1. A cap member for an automobile shock absorber, connected to one end of a base shell of the automobile shock absorber, characterized in that: The cap member for an automobile shock absorber includes a cap body and a piston rod buffer. The cap body is formed in a bottomed cylindrical shape. The piston rod buffer is connected to the bottom of the cap body and surrounds the piston rod of the automobile shock absorber.
2. The cap member for an automobile shock absorber according to claim 1, characterized in that: The piston rod buffer is formed in a cylindrical shape, and a coil spring is provided inside a cylindrical wall of the piston rod buffer.
3. The cap member for automobile shock absorber according to claim 2, characterized in that: The piston rod buffer is made of at least one of polyurethane and rubber.
4. The cap member for an automobile shock absorber according to claim 2, characterized in that: A connecting piece is also provided for connecting the piston rod buffer piece to the bottom of the cap body.
5. The automobile shock absorber cap member according to claim 2, characterized in that: An annular protrusion surrounding the piston rod of the automobile shock absorber is formed on the outer surface of the bottom of the cap body, and the annular protrusion is interference-fitted with the inner circumference of the cylinder wall of the piston rod buffer, thereby connecting the piston rod buffer to the bottom of the cap body.
6. The automobile shock absorber cap member according to any one of claims 1 to 5, characterized in that: The length of the piston rod buffer is 10 cm to 30 cm.
7. The automobile shock absorber cap member according to any one of claims 2 to 5, characterized in that: The inner diameter of the piston rod buffer is 12.5 mm to 25 mm, and there is a clearance fit between the piston rod buffer and the piston rod.
8. An automobile shock absorber, characterized in that: The invention comprises a base shell, a cap member for an automobile shock absorber according to any one of claims 1 to 7, and a piston embedded in the base shell via the cap member for an automobile shock absorber.