Damping-adjustable shock absorber

Abstract

The damper comprises a pull rod component and an outer cylinder assembly, the outer cylinder assembly comprises a hydraulic cavity with an opening in one end, and the portion, stretching into the hydraulic cavity, of the pull rod component is matched with the hydraulic cavity in a sealed mode. A first steel wire baffle ring used for limiting the part, extending into the hydraulic cavity, of the pull rod component is arranged in the hydraulic cavity; the pull rod component comprises a hollow pull rod, an adjusting rod is inserted into the end, located outside the outer cylinder assembly, of the pull rod, a step structure and a first sealing groove formed in the step structure are arranged on the adjusting rod, and a first sealing ring is arranged in the first sealing groove. The adjusting rod is sleeved with a flat washer abutting against the step structure and a second steel wire check ring, and the second steel wire check ring is clamped to the inner wall of the pull rod. And the end part of the adjusting rod is improved into axial sealing, so that the sealing effect is ensured.

Description

Technical Field

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

[0002] As the core component of a vehicle, the shock absorber is used to suppress the shock caused by the rebound of the spring after absorbing the shock and the impact from the road surface. When passing through uneven roads, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jumping. If the shock absorber is too soft, the car body will jump up and down. If the shock absorber is too hard, it will bring too much resistance and hinder the normal operation of the spring. Therefore, the shock absorber can achieve effective shock absorption during the operation of the vehicle.

[0003] The existing adjustable damping shock absorber adopts an end face sealing method to seal the end of the adjusting rod extending out of the pull rod component, and it is necessary to add a fastening nut and other structures to compress the sealing gasket to achieve sealing. However, after use, when the compression state changes, hydraulic oil leakage occurs at the end face sealing position; therefore, the existing sealing structure has poor stability. Utility Model Content

[0004] 1. Technical issues

[0005] The utility model aims to provide a damping adjustable shock absorber to solve the problem of leakage risk in the sealing method adopted at the end of the adjusting rod extending out of the pull rod component in the prior art.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A damping adjustable shock absorber comprises a tie rod component and an outer cylinder assembly, the outer cylinder assembly comprises a hydraulic chamber with an opening at one end, the portion of the tie rod component extending into the hydraulic chamber is sealed with the hydraulic chamber, a first wire retaining ring is provided in the hydraulic chamber for limiting the portion of the tie rod component extending into the hydraulic chamber; the tie rod component comprises a hollow tie rod, an adjusting rod is inserted into one end of the tie rod located outside the outer cylinder assembly, a step structure and a first sealing groove provided on the step structure are provided on the adjusting rod, a first sealing ring is provided in the first sealing groove, a flat washer abutting against the step structure and a second wire retaining ring are sleeved on the adjusting rod, and the second wire retaining ring is clamped on the inner wall of the tie rod.

[0009] Preferably, a spring seat is provided at the end of the pull rod extending into the outer cylinder assembly, a buffer plug and a spring sleeved on the buffer plug are slidably provided inside the pull rod, and the insertion end of the adjusting rod abuts against the buffer plug; a through hole connected to the hydraulic chamber is provided on the pull rod, and the buffer plug adjusts the flow rate of the through hole when it slides inward.

[0010] Preferably, a stop washer, a spring washer, a piston, a valve system and a locking nut are provided at the portion where the pull rod extends into the outer cylinder assembly. The piston is slidably fitted with the hydraulic chamber. An oil hole is provided on the piston, and the hole is located on the oil inlet end side of the oil hole.

[0011] Preferably, a sealing sleeve is further provided on the pull rod, and two second sealing grooves are provided on the sealing sleeve at intervals, and second sealing rings are respectively provided in the second sealing grooves; a shaft sealing structure cooperating with the pull rod seal is provided in the sealing sleeve.

[0012] Preferably, a limiting notch is provided on the sealing sleeve, and the first steel wire retaining ring abuts against the limiting notch.

[0013] Preferably, a mounting hole is provided on the outer cylinder assembly, and a connecting thread structure is provided on the pull rod.

[0014] Preferably, the hydraulic chamber is filled with hydraulic oil and gas.

[0015] (III) Beneficial effects

[0016] After the entire pull rod component is in sliding seal cooperation with the hydraulic cavity, the entire pull rod component is limited by the first wire retaining ring, so when the pull rod component needs to be maintained or replaced, it only needs to disassemble the first wire retaining ring to remove the entire component; at the same time, during assembly, when the first wire retaining ring is clamped, hydraulic oil and gas can be simultaneously filled into the hydraulic cavity, as long as the portion of the pull rod component extending into the hydraulic cavity is limited inside, special equipment can be used to achieve rapid assembly, thereby improving assembly efficiency;

[0017] At the same time, a step structure, a first sealing groove and a first sealing ring are arranged on the adjusting rod to form an axial seal with the inner wall of the pull rod. The first sealing ring can maintain an axial seal when the adjusting rod slides relative to the pull rod in any position without leakage. The step structure is limited by a flat washer and a second steel wire retaining ring. As long as the first sealing ring is still located in the pull rod, an axial seal can be continuously formed, avoiding the disadvantage of the prior art that the extrusion pressure needs to be maintained to achieve sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

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

[0020] Figure 3 for Figure 1 A schematic diagram of the partially enlarged structure at B in the middle;

[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] Pull rod component 1, pull rod 11, adjusting rod 12, step structure 13, first sealing groove 14, first sealing ring 15, second wire retaining ring 16, spring seat 17, buffer plug 18, spring 19, through hole 110, stop washer 111, spring washer 112, piston 113, valve system 114, locking nut 115, sealing sleeve 116, second sealing groove 117, second sealing ring 118, shaft sealing structure 119, limiting notch 120, outer tube assembly 2, hydraulic chamber 3, first wire retaining ring 4, mounting hole 5, connecting thread structure 6. 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 of the embodiments.

[0024] See also Figure 1-Figure 3 As shown, in the embodiment of the utility model, a damping adjustable shock absorber is proposed, including a tie rod component 1 and an outer cylinder assembly 2, the outer cylinder assembly 2 includes a hydraulic chamber 3 with an opening at one end, the hydraulic chamber 3 is used to fill hydraulic oil and gas, the portion of the tie rod component 1 extending into the hydraulic chamber 3 is sealed with the hydraulic chamber 3, and the hydraulic chamber 3 is provided with a first steel wire retaining ring 4 for limiting the portion of the tie rod component 1 extending into the hydraulic chamber 3. After the entire tie rod component 1 is assembled, it is inserted into the hydraulic chamber 3. It is only necessary to use the first steel wire retaining ring 4 to prevent the tie rod component 1 from completely detaching from the hydraulic chamber 3 to achieve sealing of the internal hydraulic oil and gas, and to form relative sliding to generate damping force.

[0025] Since the first steel wire retaining ring 4 is used for limited assembly, the hydraulic oil and gas in the hydraulic chamber 3 can be filled in the process of extending the pull rod component 1 into the hydraulic chamber 3, and the first steel wire retaining ring 4 is assembled when the predetermined pressure is reached, the pull rod component 1 is pushed outward by the internal hydraulic oil and gas and is blocked by the first steel wire retaining ring 4, and the internal seal remains unchanged. Therefore, special equipment can be used to fill the hydraulic chamber 3 with hydraulic oil and gas, and the first steel wire retaining ring 4 can be assembled at the same time, which can improve efficiency. At the same time, it also avoids the need to open a filling hole on the outer cylinder component 2 in the prior art, reduces leakage points, and improves stability during use.

[0026] The pull rod component 1 includes a hollow pull rod 11, and an adjusting rod 12 is inserted into one end of the pull rod 11 located outside the outer cylinder assembly 2. The adjusting rod 12 is provided with a step structure 13 and a first sealing groove 14 opened on the step structure 13, and a first sealing ring 15 is arranged in the first sealing groove 14. The adjusting rod 12 is sleeved with a flat washer abutting against the step structure 13 and a second steel wire retaining ring 16, and the second steel wire retaining ring 16 is clamped on the inner wall of the pull rod 11, wherein the adjusting rod 12 can slide relative to the pull rod 11 to adjust the inside, thereby forming an axial seal inside the pull rod 11 through the step structure 13, the first sealing groove 14 and the first sealing ring 15, and the first sealing ring 15 is kept in a sealed state under any sliding position of the adjusting rod 12, and when resetting, the flat washer and the second steel wire retaining ring 16 form a limit to ensure that the first sealing ring 15 is inside the pull rod 11.

[0027] As long as the first sealing ring 15 does not fall out of the pull rod 11, the sliding end of the adjusting rod 12 is in a sealed state, which has nothing to do with the externally applied pressure. In the prior art, externally applied pressure is required to meet the end face sealing requirement.

[0028] Specifically, the structure of the outer cylinder assembly 2 and the pull rod component 1 can directly apply the existing mature structure, and this embodiment mainly describes the corresponding assembly and sealing.

[0029] Of course, the following structure may also be adopted. Specifically, a spring 19 seat 17 is provided at the end of the pull rod 11 extending into the outer cylinder assembly 2, a buffer plug 18 and a spring 19 sleeved on the buffer plug 18 are slidably provided inside the pull rod 11, the insertion end of the adjusting rod 12 abuts against the buffer plug 18, and at the same time, a through hole 110 connected to the hydraulic chamber 3 is provided on the pull rod 11, and the flow rate of the through hole 110 is adjusted when the buffer plug 18 slides inwardly; the through hole 110 is sealed or the flow rate is changed by pushing the buffer plug 18 to move after the adjusting rod 12 slides inwardly, thereby adjusting the flow of the internal hydraulic oil, and thus adjusting the damping force; wherein, the spring 19 seat 17 limits the moving range of the buffer plug 18, and resets the buffer plug by the spring 19.

[0030] Therefore, when adjusting the damping, it is only necessary to press the adjusting rod 12 inwards, and after the adjustment, the adjusting rod 12 is automatically reset by the force of the internal spring 19, so that it is convenient for the next adjustment.

[0031] Specifically, a stop washer 111, a spring 19 washer, a piston 113, a valve system 114 and a locking nut 115 are provided at the portion where the pull rod 11 extends into the outer cylinder assembly 2. The piston 113 is slidably matched with the hydraulic chamber 3. An oil hole is provided on the piston 113. The through hole 110 is located on the oil inlet end side of the oil hole. When damping is generated, the internal hydraulic oil and gas pass through the pull rod 11, the through hole 110 and the oil hole and then flow back into the hydraulic chamber 3.

[0032] At the same time, a sealing sleeve 116 is also provided on the pull rod 11, and two second sealing grooves 117 are spaced apart on the sealing sleeve 116. Second sealing rings 118 are respectively provided in the second sealing grooves 117, wherein the two second sealing rings 118 may be of the same size or different sizes. If the sizes are different, the size of the second sealing ring 118 close to the inside is smaller than the size close to the outside. When the pull rod 11 moves, it can also meet the axial sealing state by moving synchronously with the sealing sleeve 116. At the same time, a shaft sealing structure 119 is provided in the sealing sleeve 116 to seal with the pull rod 11. The shaft sealing structure 119 adopts mature technology to achieve sliding sealing, further seals the pull rod 11 and the sealing sleeve 116, and if there is relative sliding, this part is also sealed, thereby forming a sealing fit for all parts of the entire hydraulic chamber 3 that may be connected to the outside to avoid leakage.

[0033] Specifically, a limiting notch 120 is provided on the sealing sleeve 116 , and the first wire retaining ring 4 abuts against the limiting notch 120 . By limiting the sealing sleeve 116 , the entire pull rod component 1 can be limited.

[0034] In order to facilitate the installation of the entire shock absorber, a mounting hole 5 is provided on the outer cylinder assembly 2 and a connecting thread structure 6 is provided on the pull rod 11 .

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] It is obvious 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 features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A damping adjustable shock absorber, characterized in that: It comprises a pull rod component and an outer cylinder assembly, wherein the outer cylinder assembly comprises a hydraulic cavity with an opening at one end, the portion of the pull rod component extending into the hydraulic cavity is sealed with the hydraulic cavity, and a first steel wire retaining ring is provided in the hydraulic cavity for limiting the portion of the pull rod component extending into the hydraulic cavity; The pull rod component includes a hollow pull rod, an adjusting rod is inserted into one end of the pull rod located outside the outer cylinder assembly, a step structure and a first sealing groove are provided on the adjusting rod, a first sealing ring is provided in the first sealing groove, a flat washer and a second steel wire retaining ring are sleeved on the adjusting rod to abut against the step structure, and the second steel wire retaining ring is clamped on the inner wall of the pull rod.

2. The adjustable damping shock absorber according to claim 1, characterized in that: The end of the pull rod extending into the outer cylinder assembly is provided with a spring seat, a buffer plug and a spring sleeved on the buffer plug are slidably provided inside the pull rod, and the insertion end of the adjustment rod abuts against the buffer plug; The pull rod is provided with a through hole connected to the hydraulic cavity, and the flow rate of the through hole is adjusted when the buffer plug slides inwardly.

3. The adjustable damping shock absorber according to claim 2, characterized in that: A stop washer, a spring washer, a piston, a valve system and a locking nut are provided at the portion where the pull rod extends into the outer cylinder assembly. The piston is slidably fitted with the hydraulic chamber. An oil hole is provided on the piston, and the hole is located on the oil inlet end side of the oil hole.

4. The adjustable damping shock absorber according to claim 3, characterized in that: The pull rod is also provided with a sealing sleeve, and two second sealing grooves are arranged on the sealing sleeve at intervals, and second sealing rings are respectively arranged in the second sealing grooves; A shaft sealing structure which cooperates with the pull rod seal is arranged in the sealing sleeve.

5. The adjustable damping shock absorber according to claim 4, characterized in that: The sealing sleeve is provided with a limiting notch, and the first steel wire retaining ring abuts against the limiting notch.

6. A damping adjustable shock absorber according to any one of claims 1 to 5, characterized in that: The outer cylinder assembly is provided with a mounting hole, and the pull rod is provided with a connecting thread structure.

7. The adjustable damping shock absorber according to claim 6, characterized in that: The hydraulic chamber is filled with hydraulic oil and gas.

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