A shock absorber

Abstract

To address the problems in existing technologies, this utility model provides a shock absorber, comprising: a piston rod body, a piston mechanism, a limiting member, a guide member, and at least one buffer member; wherein, the piston mechanism is disposed at one end of the piston rod body; the limiting member is disposed on the piston rod body and close to the piston mechanism; the guide member is disposed on the piston rod body and away from the limiting member, for guiding the movement of the buffer member; the buffer member is movably disposed on the piston rod body and located between the guide member and the limiting member. This utility model effectively extends the service life of the shock absorber during use and solves the problem of abnormal noise occurring after prolonged use.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorbers, specifically relating to a shock absorber that can improve the shock absorption effect. Background Technology

[0002] In a suspension system, the elastic elements vibrate upon impact. To improve ride comfort, shock absorbers are installed in parallel with the elastic elements to dampen these vibrations. Modern automotive suspension systems primarily use hydraulic shock absorbers. Their working principle is as follows: when the vehicle frame and axle vibrate and experience relative motion, the piston inside the shock absorber moves up and down, causing the fluid within the shock absorber chamber to repeatedly flow from one chamber to another through different orifices. The friction between the orifice walls and the fluid, as well as the internal friction between fluid molecules, creates a damping force, converting the vehicle's vibration energy into heat energy in the fluid. This heat energy is then absorbed by the shock absorber and dissipated into the atmosphere, thus reducing vehicle vibrations and improving the ride experience.

[0003] However, existing shock absorbers use metal springs on the piston rod to slow down the piston rod's movement and improve the shock absorption effect; however, after a period of use, the metal spring is prone to rust and other problems, producing debris; the falling debris falls into the shock absorber and causes abnormal noise, affecting the user experience.

[0004] Therefore, a shock absorber that can replace metal springs urgently needs to be developed. Utility Model Content

[0005] In order to solve the technical problems in the prior art, the present invention provides a shock absorber that can solve at least one of the technical problems in the prior art.

[0006] To achieve the above objectives, the specific solution adopted by this utility model is as follows:

[0007] A shock absorber, comprising:

[0008] Piston rod body;

[0009] A piston mechanism is located at one end of the piston rod body;

[0010] A limiting member is provided on the piston rod body and is located close to the piston mechanism;

[0011] A guide member is disposed on the piston rod body and is located away from the limiting member;

[0012] At least one buffer is movably disposed on the piston rod body and located between the guide and the limiting member;

[0013] The buffer includes:

[0014] The buffer body;

[0015] At least one annular protrusion is provided in the circumference of the buffer body;

[0016] The buffer body is provided with a through hole for oil to pass through.

[0017] The inner wall of the buffer body is provided with at least one thin-walled protrusion facing the outer side of the buffer body, which is used to form a corrugated oil passage inside the buffer body.

[0018] The buffer body is a deformable elastic plastic structure.

[0019] The buffer body has through holes for oil flow on the thin-walled protrusion.

[0020] The through holes are asymmetrically distributed on the thin-walled protrusions.

[0021] The outer side of the buffer body is provided with at least one reinforcing rib.

[0022] The interior of the buffer body is provided with at least one axial groove to facilitate the entry of oil into the interior of the buffer body.

[0023] The piston mechanism includes:

[0024] A gasket is provided on the piston rod body;

[0025] A piston component is disposed at the end of the piston rod body and close to the gasket;

[0026] A fixing member, detachably connected to the end of the piston rod body, is used to fix the piston component;

[0027] The piston is provided with an oil passage hole for oil to pass through.

[0028] The guide member is disposed on the piston rod body and is located away from the piston mechanism, and is used to guide the movement of the buffer member.

[0029] The shock absorber also includes:

[0030] Working cylinder; the piston rod body and piston mechanism are both located inside the working cylinder;

[0031] A seal is provided on the piston rod body and located between the guide and the working cylinder for sealing.

[0032] The beneficial effects of this utility model are:

[0033] The shock absorber of this invention replaces the existing metal spring by providing at least one annular protrusion in the circumference of the buffer body and a through hole for oil to pass through. Furthermore, by selecting appropriate materials, such as using an elastic plastic component for the buffer body, the weight of the shock absorber can be reduced. This also effectively extends the service life of the shock absorber and solves the problem of abnormal noise after prolonged use. Moreover, the elastic plastic component has stable chemical and physical properties, saving production costs while ensuring service life, and has good application prospects. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a perspective view of the shock absorber of this utility model after the working cylinder has been removed;

[0036] Figure 2 for Figure 1 The main view;

[0037] Figure 3 for Figure 2 A cross-sectional view of the buffer component in the middle;

[0038] Figure 4 A schematic diagram showing a through hole on a buffer component;

[0039] Figure 5 A schematic diagram showing the installation of strip-shaped reinforcing ribs on the buffer component;

[0040] Figure 6 for Figure 2 Enlarged view of point E in the image;

[0041] Figure 7 This is a schematic diagram of the structure of the shock absorber described in this utility model.

[0042] exist Figures 1-7 middle:

[0043] 1. Piston rod body; 2. Piston mechanism; 3. Limiting component; 4. Guide component; 5. Buffer component; 6. Seal component; 7. Working cylinder; 201. Gasket; 202. Piston component; 203. Fixing component; 204. First valve plate; 205. Open valve flow plate; 206. Second valve plate; 207. Gasket; 501. Buffer component body; 502. Annular protrusion; 1A. Groove; 501A. Through hole; 501B. Thin-walled protrusion; 501C. Strip reinforcing rib; 202A. Oil passage hole. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Specific Implementation Example 1:

[0046] This utility model provides an embodiment:

[0047] like Figure 1 and Figure 2 A shock absorber includes: a piston rod body 1, a piston mechanism 2, a limiting member 3, a guide member 4, and at least one buffer member 5; wherein, the piston mechanism 2 is disposed at one end of the piston rod body 1; the limiting member 3 is disposed on the piston rod body 1 and close to the piston mechanism 2; the guide member 4 is disposed on the piston rod body 1 and away from the limiting member 3, for guiding the movement of the buffer member 5; the buffer member 5 is movably disposed on the piston rod body 1 and located between the guide member 4 and the limiting member 3, for preventing the piston rod body 1 from rebounding rapidly; the guide member 4 is disposed on the piston rod body 1 and away from the piston mechanism 2, for guiding the movement of the buffer member 5.

[0048] Optional, such as Figure 3 The buffer member 5 includes: a buffer member body 501 and an annular protrusion 502; wherein the annular protrusion 502 can be arranged parallel to the circumference of the buffer member body 501; a through hole 501A for oil to pass through is provided between any two adjacent annular protrusions 502; the height of the thin-walled protrusion 501B is the same as the height of the annular protrusion 502. The through hole 501A is located at the highest point of the thin-walled protrusion 501B.

[0049] In this embodiment, the buffer 5 can be made of TPE, polyurethane, or other elastic plastics. The buffer body 501 is cylindrical and coaxially sleeved on the piston rod body 1, and can move on the piston rod body 1. Since the buffer body 501 is set on the piston rod body 1 and is located inside the working cylinder, it creates resistance to the oil in the working cylinder, reducing the upward speed of the piston rod body 1 and thus playing a shock-absorbing role. Even if the piston rod body 1 moves to its limit position, causing the buffer body 501 to collide with the limiting member 3 or the guide member 4, the material of the buffer 5 buffers the collision force, further reducing vibration. Moreover, since the buffer 5 is sleeved on the piston rod body 1, it occupies the distance from the top of the piston rod body 1, increasing the lateral force generated by the piston rod body 1 and increasing vehicle stability.

[0050] Implementation method 1:

[0051] Although this embodiment provides a way to mount the buffer 5 onto the piston rod body 1, since the buffer 5 described in this embodiment is used in an oil environment, the flow of the oil needs to be considered.

[0052] Based on this, such as Figure 3 The buffer body 501 has at least one axial groove 1A inside, facilitating the entry of oil into the buffer body 501. The inner wall of the buffer body 501 has at least one thin-walled protrusion 501B facing outwards, forming a corrugated oil passage inside the buffer body 501. This increases the distance the oil travels within the buffer body 501, further slowing the oil flow and the piston mechanism's movement, thus reducing the piston rod body 1's upward speed and increasing the damping effect. Preferably, the cross-section of the thin-walled protrusion 501B can be V-shaped to increase the distance the oil travels within the buffer body 5; alternatively, it can be designed as a similar arc-shaped structure, which can be selected as needed.

[0053] However, while the thin-walled protrusion 501B slows down the oil flow rate, it also causes a sudden increase in oil pressure at the protrusion 501B. To prevent the buffer 5 from bursting, any two adjacent annular protrusions 502 are arranged on both sides of the thin-walled protrusion 501B, and the through hole 501A is provided on the thin-walled protrusion 501B to ensure that the oil can be discharged in time during use, protecting the buffer 5 and extending its service life. Optionally, the through hole 501A can be a circular hole or an elongated hole.

[0054] Implementation Method 2:

[0055] During use, the buffer 5 will inevitably collide with the limiting member 3 or the guide member 4. If the same position of the buffer 5 is repeatedly collided with the limiting member 3 or the guide member 4, it will cause damage to a certain part of the buffer 5 and affect its service life.

[0056] To solve this technical problem, a technical solution based on implementation method 1 is proposed, such as... Figure 4 The through holes 501A may be asymmetrically distributed on the thin-walled protrusions 501B, that is, the number of through holes 501A on one side is greater than the number of through holes 501A on the other side, such as... Figure 4 One through hole 501A is provided on the left side and two on the right side. When the buffer body 501 discharges oil through the through holes 501A, the side with more through holes 501A discharges a larger flow rate of oil and generates a larger reaction force, while the side with fewer through holes 501A discharges a smaller flow rate of oil and generates a smaller reaction force. Furthermore, the large and small forces are not completely symmetrical. At this time, an unbalanced position is formed on both sides of the buffer body 501, causing the buffer body 501 to rotate on the piston rod body 1. Even if it collides with the limiting member 3 or the guide member 4 again, the collision position of the buffer body 501 will be different from the previous collision position, further increasing the service life of the buffer 5. Figure 4 The arrows indicate the direction of oil discharge; the dashed lines indicate the rotation direction of buffer 5.

[0057] In practical use, the number of buffers 5 in implementation method 1 or 2 can be increased as needed. For example, two buffers 5 can be used simultaneously on the piston rod body 1. Since the function and principle remain unchanged, this article will not elaborate further.

[0058] Furthermore, in practical use, the strength of the buffer body 501 can be increased as needed, such as by evenly distributing strip-shaped reinforcing ribs 501C along the axial direction on the outer side of the buffer body 501, as shown in the structure. Figure 5 As shown, this enhances the impact resistance of the buffer body 501; preferably, the strength of the reinforcing rib 501C is greater than the strength of the thin-walled protrusion 501B.

[0059] In this embodiment, as Figure 6The piston mechanism 2 used includes: a gasket 201, a piston component 202, and a fixing component 203; wherein, the gasket 201 is fixedly disposed on the piston rod body 1; the piston component 202 is disposed at the end of the piston rod body 1 and close to the gasket 201; the fixing component 203 is connected to the end of the piston rod body 1 by a bolt structure to fix the piston component 202; the piston component 201 is provided with an oil passage hole 202A for passing oil; moreover, the piston mechanism 2 also includes a first valve plate 204 disposed between the gasket 201 and the piston component 202; the piston component 202 and the fixing component 203 are sequentially provided with an open valve flow plate 205, a second valve plate 206, and a gasket 207. Specific Implementation Example 2:

[0061] This utility model also provides an embodiment:

[0062] like Figure 7 The shock absorber described in Specific Embodiment 1 further includes: a working cylinder 7 and a sealing element 6; wherein the piston rod body 1 and the piston mechanism 2 are both disposed inside the working cylinder 7; the sealing element 6 is disposed on the piston rod body 1 and located between the guide 4 and the working cylinder 7 for sealing.

[0063] The shock absorber described in this embodiment uses a non-metallic buffer 5 instead of the existing metal spring, which reduces the weight of the shock absorber, increases its service life, solves the problem of abnormal noise, and improves the user experience.

[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions made by those skilled in the art within the technical scope disclosed in this utility model are all within the protection scope of this utility model. Therefore, the protection scope of this utility model is determined by the scope of the claims.

Claims

1. A shock absorber, characterized in that, include: Piston rod body; A piston mechanism is located at one end of the piston rod body; A limiting member is provided on the piston rod body and is located close to the piston mechanism; A guide member is disposed on the piston rod body and is located away from the limiting member; At least one buffer is movably disposed on the piston rod body and located between the guide and the limiting member; The buffer includes: The buffer body; At least one annular protrusion is provided in the circumference of the buffer body; The buffer body is provided with a through hole for oil to pass through.

2. The shock absorber according to claim 1, characterized in that: The inner wall of the buffer body is provided with at least one thin-walled protrusion facing the outer side of the buffer body, which is used to form a corrugated oil passage inside the buffer body.

3. The shock absorber according to claim 1 or 2, characterized in that: The buffer body is a deformable elastic plastic structure.

4. The shock absorber according to claim 2, characterized in that: The buffer body has through holes for oil flow on the thin-walled protrusion.

5. The shock absorber according to claim 4, characterized in that: The through holes are asymmetrically distributed on the thin-walled protrusions.

6. The shock absorber according to claim 1 or 2, characterized in that: The outer side of the buffer body is provided with at least one reinforcing rib.

7. The shock absorber according to any one of claims 1-4, characterized in that: The interior of the buffer body is provided with at least one axial groove for oil to enter the interior of the buffer body.

8. The shock absorber according to claim 1, characterized in that, The piston mechanism includes: A gasket is provided on the piston rod body; A piston component is disposed at the end of the piston rod body and close to the gasket; A fixing member, detachably connected to the end of the piston rod body, is used to fix the piston component; The piston is provided with an oil passage hole for oil to pass through.

9. The shock absorber according to claim 1, characterized in that: The guide member is disposed on the piston rod body and is located away from the piston mechanism, and is used to guide the movement of the buffer member.

10. The shock absorber according to claim 1, characterized in that, Also includes: Working cylinder; the piston rod body and piston mechanism are both located inside the working cylinder; A seal is provided on the piston rod body and located between the guide and the working cylinder for sealing.

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