Combined dustproof shock absorber

Abstract

The utility model provides a combined dustproof shock absorber, and belongs to the field of shock absorbers. The problem that impurities easily enter the shock absorber to affect the efficiency is solved. The combined type dustproof shock absorber comprises a piston rod, a damping spring and a piston cylinder, the damping spring is arranged on the piston rod in a sleeved mode, a ring base is arranged at the tail end of the piston rod, a connecting ring is arranged outside the piston cylinder, the combined type dustproof shock absorber further comprises a dustproof assembly, the dustproof assembly comprises a dustproof cylinder, a sealing ring sleeve and a lining, and the interior of the dustproof cylinder is of a stepped hole structure. The tail end of the sealing ring sleeve is in internal and external thread fit with the connecting ring, the ring seat is of a concave structure, a stepped plummer block is arranged outside the ring seat, a plurality of balls are arranged outside the lining, axial movement guiding is facilitated, the sealing ring sleeve is connected with the stepped plummer block on the ring seat in an internal and external thread fit mode, and sealing lips are sequentially arranged on the outer edge of the sealing ring sleeve at intervals. And a sealing ring is embedded between every two adjacent sealing lips. The utility model has the advantage of good dustproof effect.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorbers, and relates to a shock absorber, particularly a combined dustproof shock absorber. Background Technology

[0002] Shock absorbers are used to suppress the oscillations caused by the rebound of springs after absorbing shocks, as well as impacts from the road surface. When driving over uneven roads, although the shock-absorbing springs can filter out road vibrations, the springs themselves will still have reciprocating motion. The shock absorber is used to suppress this spring bounce. However, in existing shock absorbers, the piston rod and piston base have a large gap, and the working environment of the shock absorber is relatively harsh. Large pieces of sand and gravel often enter the piston base through this gap. Over time, the accumulation of sand and gravel causes the shock absorber to lose its damping effect, reducing its service life and strength.

[0003] In response to the above problems, Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a combined dustproof and shock-absorbing device.

[0005] The purpose of this utility model can be achieved through the following technical solution: A combined dustproof shock absorber, comprising a piston rod, a damping spring and a piston cylinder, wherein the damping spring is sleeved on the piston rod, characterized in that the piston rod end has an annular seat for the damping spring to abut and limit its position, and the piston cylinder is provided with a connecting ring for the damping spring to abut and limit its position.

[0006] The combined dustproof shock absorber also includes dustproof components;

[0007] The dustproof assembly includes a dustproof cylinder, a sealing ring sleeve, and a bushing;

[0008] The dustproof cylinder has a stepped hole structure inside, and its end part is threaded with the connecting ring.

[0009] The ring seat is configured with a U-shaped structure, and the outer side of the ring seat is provided with a stepped shaft platform for the bushing and sealing ring to be installed together;

[0010] The bushing is provided with multiple balls on its outer surface to facilitate axial movement and guidance;

[0011] The sealing ring sleeve and the stepped shaft on the ring seat are connected by internal and external threads;

[0012] The outer edge of the sealing ring is provided with sealing lips spaced apart in sequence, and a sealing ring is fitted between two adjacent sealing lips.

[0013] In the aforementioned combined dustproof shock absorber, the cross-sections of multiple sealing lips are arranged in a figure-eight shape, and their free ends can slide against the inner wall of the dustproof cylinder. The multiple sealing lips and the sealing ring are integrally formed. The free ends of the sealing lips are folded outward to form a guide slope with an inclination angle of 15°-30°, and the lip thickness gradually decreases from the root to the end.

[0014] In the aforementioned combined dustproof shock absorber, the outer surface of the bushing is provided with an annular groove along the circumference, the ball bearing is embedded in the annular groove through a retainer, and the ball bearing part protrudes from the outer surface of the bushing and rolls in contact with the inner wall of the dustproof cylinder.

[0015] In the aforementioned combined dustproof and shock-absorbing device, the stepped shaft platform of the ring seat includes a first step and a second step, the diameter of the first step is larger than that of the second step, the bushing is sleeved on the first step, and the sealing ring is threadedly connected to the second step.

[0016] In the aforementioned combined dustproof shock absorber, the sealing ring is made of elastic rubber, with an O-shaped or X-shaped cross-section, and the embedding depth is 1 / 2 to 2 / 3 of the distance between the sealing lips.

[0017] Compared with existing technologies, this combined dustproof shock absorber has the following advantages:

[0018] 1. The sealing lip structure, together with the sealing ring structure, forms a multi-level sealing structure, which can adapt to dynamic working conditions, effectively isolate contaminants such as dust and mud, and extend the life of internal components. Its sealing lip thickness gradually changes and the guide slope design reduces sliding resistance and avoids lip roll-up or wear.

[0019] 2. The combination of damping spring and limiting structure ensures linear output of damping force, improves shock absorption stability, and at the same time, the use of ball bearings to guide and reduce friction, avoids jamming, and makes the shock absorber more responsive. Attached Figure Description

[0020] Figure 1 This is a half-section structural diagram of the combined dustproof shock absorber.

[0021] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] Figure 3 This is a schematic diagram of the bushing structure of this combined dustproof shock absorber.

[0023] In the diagram, 1. Piston rod; 2. Damping spring; 3. Piston cylinder; 4. Ring seat; 5. Connecting ring; 6. Dustproof sleeve; 7. Sealing ring sleeve; 8. Bushing; 9. Stepped shaft platform; 10. Ball bearing; 11. Sealing lip; 12. Sealing ring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, this combined dustproof shock absorber includes a piston rod 1, a damping spring 2, and a piston cylinder 3. The damping spring 2 is sleeved on the piston rod 1. The piston rod 1 has a ring seat 4 at its end for the damping spring 2 to abut and limit its movement. The piston cylinder 3 has a connecting ring 5 on its outside for the damping spring 2 to abut and limit its movement. The combined dustproof shock absorber also includes a dustproof assembly, which includes a dustproof cylinder 6, a sealing ring sleeve 7, and a bushing 8. The dustproof cylinder 6 has a stepped hole structure inside, and its end part is threaded with the connecting ring 5. The ring seat 4 has a U-shaped structure. The ring seat 4 has a stepped shaft platform 9 on its outside for the bushing 8 and the sealing ring sleeve 7 to fit together. The bushing 8 has multiple balls 10 on its outside for axial movement and guidance. The sealing ring sleeve 7 is threaded with the stepped shaft platform 9 on the ring seat 4. The outer edge of the sealing ring sleeve 7 is provided with sealing lips 11 spaced apart, and a sealing ring 12 is fitted between two adjacent sealing lips 11.

[0026] Multiple sealing lips 11 are arranged in a figure-eight cross-section, and their free ends can slide against the inner wall of the dustproof cylinder 6. The multiple sealing lips 11 and the sealing ring 7 are integrally formed. The free ends of the sealing lips 11 are folded outward to form a guide slope with an inclination angle of 15°-30°. The lip thickness gradually decreases from the root to the end. The outer surface of the bushing 8 has an annular groove along the circumference. The ball 10 is embedded in the annular groove through a retainer, and part of the ball 10 protrudes from the outer surface of the bushing 8 and rolls in contact with the inner wall of the dustproof cylinder 6. The stepped shaft 9 of the ring seat 4 includes a first step and a second step. The diameter of the first step is larger than that of the second step. The bushing 8 is fitted on the first step. The sealing ring 7 is connected to the second step by a thread. The sealing ring 12 is made of elastic rubber, and its cross-section is O-shaped or X-shaped. The embedding depth is 1 / 2-2 / 3 of the distance between the sealing lips 11.

[0027] The sealing lip 11 structure, together with the sealing ring 12 structure, forms a multi-level sealing structure, which can adapt to dynamic working conditions, effectively isolate contaminants such as dust and mud, and extend the life of internal components. The sealing lip 11 has a gradually changing thickness and a guide slope design, which reduces sliding resistance and prevents the lip from rolling or wearing. The cooperation between the damping spring 2 and the limiting structure ensures linear output of damping force and improves shock absorption stability. At the same time, the ball bearing 10 is used to guide and reduce friction, avoid jamming, and make the shock absorber more responsive.

[0028] Working principle

[0029] A damping spring 2 is fitted onto the piston rod 1 and limited by the connecting ring 5 outside the piston cylinder 3 via the end ring seat 4 and the piston cylinder 3. When subjected to external impact, the spring compresses / rebounds to generate damping force, absorbing vibration energy and achieving a shock absorption effect. The dustproof cylinder 6 is connected to the connecting ring 5 via internal and external threads, forming a closed shell to prevent external dust from entering. The sealing ring sleeve 7 is threaded to the ring seat 4 via a stepped shaft 9. Its V-shaped sealing lip 11 (tilt angle 15°-30°) slides against the inner wall of the dustproof cylinder 6, forming a dynamic seal. The embedded elastic sealing ring 12 (O-ring / X-ring) further fills the lip gap, providing a double seal to prevent contaminant intrusion. The annular groove on the outer surface of the bushing 8 is embedded with ball bearings 10, which are fixed by a retainer. The ball bearings 10 roll against the inner wall of the dustproof cylinder 6, reducing frictional resistance and ensuring smooth axial movement of the piston rod 1. The first step of the ring seat 4 mounts the bushing 8, and the second step connects to the sealing ring sleeve 7. The layered structure optimizes the component fitting accuracy and reduces uneven wear during vibration.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document uses a lot of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any kind of additional limitation would contradict the spirit of this invention.

Claims

1. A combined dustproof shock absorber, comprising a piston rod (1), a damping spring (2), and a piston cylinder (3), wherein the damping spring (2) is sleeved on the piston rod (1), characterized in that, The piston rod (1) has a ring seat (4) at the end for the damping spring (2) to abut and limit, and the piston cylinder (3) is provided with a connecting ring (5) on the outside for the damping spring (2) to abut and limit. The combined dustproof shock absorber also includes dustproof components; The dustproof assembly includes a dustproof cylinder (6), a sealing ring (7), and a bushing (8). The dustproof cylinder (6) has a stepped hole structure inside, and its end part is threaded with the connecting ring (5). The ring seat (4) is arranged in a U-shape, and the outer side of the ring seat (4) is provided with a stepped shaft platform (9) for the bushing (8) and sealing ring (7) to be installed together; The bushing (8) is provided with multiple balls (10) on its outside to facilitate axial movement and guidance; The sealing ring sleeve (7) and the stepped shaft (9) on the ring seat (4) are connected by internal and external threads; The sealing ring (7) has sealing lips (11) spaced apart at the outer edge, and a sealing ring (12) is fitted between two adjacent sealing lips (11).

2. The combined dustproof damper according to claim 1, characterized in that, The multiple sealing lips (11) are arranged in a figure-eight shape, and their free ends can slide against the inner wall of the dustproof cylinder (6). The multiple sealing lips (11) and the sealing ring (7) are integrally formed. The free ends of the sealing lips (11) are folded outward to form a guide slope with an inclination angle of 15°-30°, and the lip thickness gradually decreases from the root to the end.

3. The combined dustproof damper according to claim 1, characterized in that, The outer surface of the bushing (8) is provided with an annular groove along the circumference. The ball (10) is embedded in the annular groove through a retainer, and part of the ball (10) protrudes from the outer surface of the bushing (8) and rolls in contact with the inner wall of the dustproof cylinder (6).

4. A combined dustproof and shock absorber according to claim 1, characterized in that, The stepped shaft platform (9) of the ring seat (4) includes a first step and a second step. The diameter of the first step is larger than that of the second step. The bushing (8) is sleeved on the first step, and the sealing ring (7) is threaded to the second step.

5. The combined dustproof damper according to claim 1, wherein The sealing ring (12) is made of elastic rubber, with an O-shaped or X-shaped cross section, and the embedding depth is 1 / 2 to 2 / 3 of the distance between the sealing lips (11).

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