Damping adjusting structure of shock absorber

Abstract

The damping adjusting structure comprises a hollow pull rod and a connector installed on the hollow pull rod, a plug is arranged at one end of the hollow pull rod, an ejector pin is arranged in the hollow pull rod in a sliding mode, and the end of the ejector pin extends out of the hollow pull rod; the connector is provided with an adjusting cavity and an adjusting seat installed in the adjusting cavity, an adjusting rod is rotatably installed on the adjusting seat, an adjusting block is installed in the adjusting cavity in a sliding mode, the adjusting rod is in threaded fit with the adjusting block, a conical surface is arranged on the adjusting block, and the end of the ejector pin abuts against the conical surface; a rotation stopping structure is further arranged between the adjusting rod and the adjusting seat; the ejector pin is pushed in a small-size space, the circulation flow of internal hydraulic oil is adjusted, and damping adjustment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a damping adjustment structure of a shock absorber. Background Art

[0002] Shock absorbers, a core component of a vehicle, are used to dampen the shock of rebound after springs absorb shock, as well as impact from the road. While the shock-absorbing springs filter out road vibrations when driving over uneven surfaces, the springs themselves still experience reciprocating motion, and the shock absorbers are designed to dampen this spring bouncing. If the shock absorbers are too soft, the vehicle body will bounce up and down, while if they are too hard, they will create excessive resistance, hindering the proper functioning of the springs. Thus, shock absorbers effectively mitigate vibrations during vehicle operation.

[0003] The damping adjustment of the shock absorber is mainly achieved by adjusting the circulation volume of the internal hydraulic oil. Generally, a thimble is provided in the middle of the pull rod. The thimble moves back and forth relative to the pull rod to adjust the flow aperture of the plug and adjust the flow volume of the circulating hydraulic oil. Since the thimble is located inside the pull rod, it is inconvenient to adjust the thimble. Therefore, it is necessary to consider a mechanism that can facilitate the reciprocating movement of the thimble in a small volume. Utility Model Content

[0004] (1) Technical issues

[0005] The purpose of the utility model is to provide a damping adjustment structure of a shock absorber, which solves the problem of pushing a push pin located inside a pull rod in a small volume.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A damping adjustment structure of a shock absorber includes a hollow pull rod and a joint installed on the hollow pull rod, one end of the hollow pull rod is provided with a plug, a thimble is slidably provided in the hollow pull rod, and the end of the thimble extends out of the hollow pull rod; the joint is provided with an adjustment cavity and an adjustment seat installed in the adjustment cavity, an adjustment rod is rotatably installed on the adjustment seat, an adjustment block is slidably installed in the adjustment cavity, the adjustment rod is threadedly engaged with the adjustment block, the adjustment block is provided with a conical surface, and the end of the thimble abuts against the conical surface; a stop structure is also provided between the adjustment rod and the adjustment seat.

[0009] Preferably, the hollow pull rod is provided with a flow hole connected to the plug.

[0010] Preferably, the anti-rotation structure includes a limiting hole laterally arranged on the adjusting rod, a spring is provided in the limiting hole, a steel ball is provided at the opening of the limiting hole, and the steel ball is in abutment with the adjusting seat.

[0011] Preferably, a first sealing ring is provided between the adjusting rod and the adjusting seat, a second sealing ring is provided between the adjusting seat and the adjusting cavity, and a third sealing ring is provided between the ejector pin and the hollow pull rod.

[0012] Preferably, an elastic member for pushing the ejector pin to press against the conical surface is further provided in the hollow pull rod.

[0013] Preferably, a groove is formed on the end surface of the adjusting rod located outside the adjusting seat.

[0014] Preferably, the end of the ejector pin close to the plug has a conical head.

[0015] (3) Beneficial effects

[0016] After the adjusting rod rotates relative to the adjusting seat, the adjusting block is driven to slide along the adjusting cavity. The conical surface on the adjusting block cooperates with the end of the ejector pin. When the adjusting block moves toward the inside of the adjusting cavity, the ejector pin is pushed to reduce the flow of the plug, thereby reducing the flow of the internal hydraulic oil and increasing the damping. When the adjusting block moves toward the outside of the adjusting cavity, the flow of the hydraulic oil in the plug is increased, reducing the damping. Since the movement in the direction of the adjusting cavity is achieved by rotating with threaded fit, it is converted into pushing the ejector pin to move along the hollow pull rod, which can be achieved in a small space. When the internal hydraulic oil pushes the ejector pin to have a tendency to slide outward, it can be limited and tightened by the conical surface on the adjusting block, so that the current damping can be kept basically unchanged, so that the damping can be maintained after the adjustment is completed.

[0017] At the same time, the anti-rotation structure is used to further limit the rotation of the adjustment rod, so that the maintained state after the damping is adjusted is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0020] Figure 3 This is a schematic structural diagram of a joint in an embodiment of the present utility model;

[0021] exist Figures 1 to 3 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0022] Hollow pull rod 1, circulation hole 101, joint 2, adjustment chamber 20, plug 3, ejector pin 4, adjustment seat 5, adjustment rod 6, groove 60, adjustment block 7, tapered surface 70, anti-rotation structure 8, limit hole 81, spring 82, steel ball 83, first sealing ring 9, second sealing ring 10, third sealing ring 11. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] See also Figure 1-Figure 3 As shown, in the embodiment of the present invention, a damping adjustment structure of a shock absorber is proposed, which is applied to the shock absorber. Specifically, the overall structure of the shock absorber is the existing technology. This embodiment is to improve the specific structure of the internal ejector pin 4 to achieve sliding adjustment, so that the position of the ejector pin 4 can be adjusted in a smaller volume. Specifically, it includes a hollow rod 1 and a joint 2 installed on the hollow rod 1. One end of the hollow rod 1 is provided with a plug 3. The hollow rod 1 is provided with an ejector pin 4 slidingly. The end of the ejector pin 4 extends out of the hollow rod 1. The plug 3 is connected to the hollow rod 1 to achieve internal flow of hydraulic oil. The damping adjustment is to adjust the flow of hydraulic oil flowing through the plug 3. Generally speaking, when the hydraulic oil flows slowly, the damping increases, and when the hydraulic oil flows faster, the damping decreases. Therefore, the damping adjustment can be achieved by pushing the ejector pin 4 relative to the plug 3 to adjust the distance.

[0025] In order to facilitate the complete blocking effect when the ejector pin 4 moves toward the plug 3, a conical head is provided on the end of the ejector pin 4 close to the plug 3. When the damping is maximum, the conical head can be completely inserted into the plug 3 to form a blockage.

[0026] An adjusting cavity 20 and an adjusting seat 5 installed in the adjusting cavity 20 are provided in the joint 2, an adjusting rod 6 is rotatably installed on the adjusting seat 5, an adjusting block 7 is slidably installed in the adjusting cavity 20, the adjusting rod 6 is threadedly engaged with the adjusting block 7, a tapered surface 70 is provided on the adjusting block 7, and the end of the ejector pin 4 abuts against the tapered surface 70. In order to save space, the adjusting cavity 20 is directly opened on the side close to the hollow pull rod 1 connected to the joint 2, and the adjusting seat 5 is fixed, so that after the adjusting rod 6 rotates relative to the adjusting seat 5, the adjusting block 7 can slide inward or outward along the adjusting cavity 20 under the action of the threaded engagement, and the end of the ejector pin 4 abuts against the tapered surface 70 on the adjusting block 7. Therefore, when the adjusting rod 6 is rotated to drive the adjusting block 7 to move toward the inside of the adjusting chamber 20, the ejector pin 4 is pushed toward the plug 3, thereby reducing the flow of hydraulic oil and increasing the damping. When the adjusting block 7 moves toward the outside of the adjusting chamber 20, the ejector pin 4 is pushed backward by the internal hydraulic oil until it is pressed against the conical surface 70, and the flow of the internal hydraulic oil is increased, and the damping is reduced.

[0027] At the same time, a rotation-stopping structure 8 is provided between the adjusting rod 6 and the adjusting seat 5. The rotation-stopping structure 8 is used to stop the rotation of the adjusting rod 6 relative to the adjusting seat 5. Generally speaking, the thrust generated from the tapered surface 70 does not cause the adjusting block 7 to rotate relative to the adjusting rod 6. Therefore, after the relative position of the adjusting block 7 is adjusted, the position of the ejector pin 4 can be reliably stopped, and the damping can be kept basically unchanged after adjustment.

[0028] Among them, the anti-rotation structure 8 includes a limiting hole 81 arranged horizontally on the adjusting rod 6, a spring 82 is provided in the limiting hole 81, and a steel ball 83 is provided at the opening of the limiting hole 81, and the steel ball 83 is abutted and matched with the adjusting seat 5. The spring 82 pushes the steel ball 83 to press against the inner wall of the adjusting seat 5 to achieve preliminary stopping. The stopping here is that as long as there is no external force to rotate the adjusting rod 6, the adjusting rod 6 will not rotate actively under the action of the threaded cooperation and the limiting of the steel ball 83, and the thrust of the ejector pin 4 on the adjusting block 7 will not cause the adjusting block 7 to rotate. Therefore, there is no need to achieve complete locking here, and it is only necessary to stop the rotation state of the adjusting rod 6 relative to the adjusting seat 5.

[0029] Specifically, a flow hole 101 connected to the plug 3 is opened on the hollow pull rod 1. The flow hole 101 is located on the hollow pull rod 1 near one end of the plug 3, so that the hydraulic oil flowing in from the outside of the hollow pull rod 1 can quickly pass through the flow hole 101 and then flow through the plug 3. The flow hole 101 can pass through the hollow pull rod 1 or only be connected to the internal hollow.

[0030] At the same time, a first sealing ring 9 is provided between the adjusting rod 6 and the adjusting seat 5, a second sealing ring 10 is provided between the adjusting seat 5 and the adjusting chamber 20, and a third sealing ring 11 is provided between the ejector pin 4 and the hollow pull rod 1. By achieving sealing at three positions at the same time, the internal hydraulic oil is effectively prevented from flowing out from the joint 2.

[0031] At the same time, an elastic member for pushing the ejector pin 4 against the conical surface 70 may also be provided in the hollow pull rod 1. The elastic member can be used to accelerate the rapid outward sliding of the ejector pin 4 during the damping adjustment process. Of course, it is also possible not to add the elastic member, but there will be a certain delay.

[0032] At the same time, a groove 60 , such as a slotted groove, is provided on the end surface of the adjusting rod 6 located outside the adjusting seat 5 , so as to facilitate rotational adjustment of the adjusting rod 6 by adjusting a screwdriver.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A damping adjustment structure of a shock absorber, characterized in that: It comprises a hollow pull rod (1) and a joint (2) mounted on the hollow pull rod (1), one end of the hollow pull rod (1) is provided with a plug (3), a thimble (4) is slidably provided inside the hollow pull rod (1), and the end of the thimble (4) extends out of the hollow pull rod (1); The joint (2) is provided with an adjustment cavity (20) and an adjustment seat (5) installed in the adjustment cavity (20); an adjustment rod (6) is rotatably installed on the adjustment seat (5); an adjustment block (7) is slidably installed in the adjustment cavity (20); the adjustment rod (6) is threadedly engaged with the adjustment block (7); a tapered surface (70) is provided on the adjustment block (7), and the end of the ejector pin (4) abuts against the tapered surface (70); A rotation-stop structure (8) is also provided between the adjusting rod (6) and the adjusting seat (5).

2. The damping adjustment structure of a shock absorber according to claim 1, characterized in that: The hollow pull rod (1) is provided with a flow hole (101) which is in communication with the plug (3).

3. The damping adjustment structure of a shock absorber according to claim 2, characterized in that: The anti-rotation structure (8) comprises a limiting hole (81) arranged transversely on the adjusting rod (6), a spring (82) is provided in the limiting hole (81), a steel ball (83) is provided at the opening of the limiting hole (81), and the steel ball (83) is in abutment with the adjusting seat (5).

4. The damping adjustment structure of a shock absorber according to claim 3, characterized in that: A first sealing ring (9) is provided between the adjusting rod (6) and the adjusting seat (5), a second sealing ring (10) is provided between the adjusting seat (5) and the adjusting cavity (20), and a third sealing ring (11) is provided between the ejector pin (4) and the hollow pull rod (1).

5. The damping adjustment structure of a shock absorber according to claim 4, characterized in that: An elastic member for pushing the ejector pin (4) against the conical surface (70) is also provided in the hollow pull rod (1).

6. The damping adjustment structure of a shock absorber according to any one of claims 1 to 5, characterized in that: A groove (60) is formed on the end surface of the adjusting rod (6) located outside the adjusting seat (5).

7. The damping adjustment structure of a shock absorber according to claim 6, characterized in that: The end of the ejector pin (4) close to the plug (3) has a conical head.

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