Hollow piston rod of shock absorber

Abstract

The utility model provides a shock absorber hollow piston rod, which relates to the technical field of piston rods, and comprises a piston rod body, the top end of the piston rod body is fixedly connected with a first connecting sleeve, the outer surface of the first connecting sleeve is provided with a first external thread, and the outer surface of the first connecting sleeve is provided with an adjusting sleeve. A second connecting sleeve is arranged at the position, close to the upper portion, of the inner surface wall of the adjusting sleeve. When the device is used, the adjusting sleeve is rotated in the forward direction, the first connecting sleeve and the second connecting sleeve cannot rotate under the action of the limiting mechanism, and at the moment, the effect of adjusting the overall length of the device is achieved under the action of the first external thread, the second external thread, the first internal thread and the second internal thread; and the overall structure is simple, the overall length of the shock absorber can be easily adjusted to be matched with other devices without a professional foundation, and the use convenience is high.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rods, in particular to a hollow piston rod of a shock absorber. Background Art

[0002] Shock absorbers are an indispensable and important component of automobiles. They can quickly attenuate the vibration of the frame and body, thereby improving the smoothness and comfort of the car's driving. At present, the body of the piston rod for ordinary automobiles is mostly a solid structure. The solid structure of the automobile piston rod not only uses a relatively large amount of material for the piston rod body, that is, the manufacturing cost is high, but most importantly, according to the physical properties, the heavier the weight of the piston rod itself, that is, the greater the mass, the greater the inertia it will generate. The greater the inertia, the more frequent the friction between the piston rod and the oil seal of the cylinder body, thereby greatly shortening the service life of the piston rod.

[0003] In the prior art, such as Chinese patent publication No. CN219549466U, a shock absorber hollow piston rod is disclosed, including a main rod, the top end and the bottom end of the main rod are provided with connecting rods, the ends of the two connecting rods close to each other are fixedly connected with extended threaded rods, the two connecting rods are threadedly connected to the main rod through the extended threaded rods, the outer surface of each of the extended threaded rods is sleeved with a first gasket, and the outer surface of each of the connecting rods is fixedly connected with a baffle. The device is provided with threads inside the hollow piston rod, and the two connecting rods are respectively threadedly connected to the two ends of the piston rod through the extended threaded rods. The hollow piston rod can be installed with the shock absorber through the connecting threaded rods at both ends of the two connecting rods under the cooperation of the two connecting rods, so that the hollow piston rod can be firmly installed inside the shock absorber, effectively preventing the risk of shaking or falling off of the piston rod due to the hollow piston rod and the shock absorber not being connected tightly enough.

[0004] Although the hollow piston rod in the above patent solves the risk of the piston rod in the shock absorber shaking or falling off, when the shock absorber is used, it needs to be adjusted to a specific length to adapt to the corresponding device. When the shock absorber is adjusted, the total length of the shock absorber needs to be controlled by the hydraulic system, which is more troublesome to adjust and less convenient to use. Therefore, in response to the above problems, we propose a new type of hollow piston rod for shock absorber. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that when the shock absorber is used, it needs to be adjusted to a specific length before it can adapt to the corresponding device, and when the shock absorber is adjusted, the total length of the shock absorber needs to be controlled by a hydraulic system, the adjustment is more troublesome, and the convenience of use is poor. A hollow piston rod of a shock absorber is proposed to solve the problem that

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hollow piston rod of a shock absorber, comprising a piston rod body, a first connecting sleeve fixedly connected to the top end of the piston rod body, a first external thread provided on the outer surface of the first connecting sleeve, an adjusting sleeve provided on the outer surface of the first connecting sleeve, a second connecting sleeve provided on the inner surface wall of the adjusting sleeve near the top, a second external thread provided on the outer surface of the second connecting sleeve, a first internal thread provided on the inner surface wall of the adjusting sleeve near the bottom, a second internal thread provided on the inner surface wall of the adjusting sleeve near the top, and a limiting mechanism provided between the inner surface walls of the first connecting sleeve and the second connecting sleeve.

[0007] Preferably, the first internal thread matches the first external thread, and the second internal thread matches the second external thread.

[0008] Preferably, the limiting mechanism comprises a plurality of connecting blocks, and the plurality of connecting blocks are fixedly connected to the inner surface wall of the first connecting sleeve at equal distances and close to the bottom, and a sliding rod is fixedly connected to the top of the connecting block.

[0009] Preferably, a sliding sleeve on the outer surface of the sliding rod is provided with a limit block, and the limit block is fixedly connected to a position of the inner surface wall of the second connecting sleeve near the top.

[0010] Preferably, a first buffer pad is bonded to the top of the first connecting sleeve, and a second buffer pad is bonded to the bottom of the second connecting sleeve.

[0011] Preferably, a fixing bolt is installed on the outer surface of the adjustment sleeve near the top, and the end of the fixing bolt is in conflict with the outer surface of the second connecting sleeve.

[0012] Preferably, a hexagonal sleeve is fixedly connected to a position near the middle of the outer surface of the adjustment sleeve, a connecting head is fixedly connected to the top end of the second connecting sleeve, and an anti-slip head is fixedly connected to the top end of the sliding rod.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, when the device is in use, the adjusting sleeve is rotated in the forward direction. Because the first connecting sleeve and the second connecting sleeve cannot rotate under the action of the limiting mechanism, the first external thread, the second external thread, the first internal thread and the second internal thread can adjust the overall length of the device. When the adjusting sleeve is rotated in the reverse direction, the overall length of the device can be shortened. The overall structure is simple, and the overall length of the shock absorber can be easily adjusted to match other devices without professional knowledge, and the convenience of use is high.

[0015] 2. In the present invention, the hexagonal sleeve is provided to facilitate the rotation of the adjustment sleeve, and the first buffer pad and the second buffer pad are provided to provide a buffering effect when the first connecting sleeve and the second connecting sleeve touch each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a hollow piston rod of a shock absorber is proposed for the utility model;

[0017] Figure 2 A cross-sectional view of a hollow piston rod of a shock absorber is provided for the utility model;

[0018] Figure 3 A cross-sectional view of a first connecting sleeve of a hollow piston rod of a shock absorber is provided for the utility model;

[0019] Figure 4 The utility model provides a schematic diagram of the second connecting sleeve structure of the hollow piston rod of the shock absorber;

[0020] Figure 5 The utility model provides a schematic diagram of the structure of an adjustment sleeve of a hollow piston rod of a shock absorber;

[0021] Figure 6 The utility model provides a structural schematic diagram of a limiting mechanism of a hollow piston rod of a shock absorber.

[0022] Legend: 1. Piston rod body; 2. First connecting sleeve; 21. First external thread; 22. First buffer pad; 3. Second connecting sleeve; 31. Second external thread; 32. Connecting head; 33. Second buffer pad; 4. Adjusting sleeve; 41. Hexagonal sleeve; 42. First internal thread; 43. Second internal thread; 44. Fixing bolt; 5. Limiting mechanism; 501. Connecting block; 502. Sliding rod; 503. Limiting block; 504. Anti-slip head. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] Embodiment 1, as Figure 1-Figure 6As shown, the utility model provides a shock absorber hollow piston rod, including a piston rod body 1, a first connecting sleeve 2 is fixedly connected to the top of the piston rod body 1, a first external thread 21 is arranged on the outer surface of the first connecting sleeve 2, an adjusting sleeve 4 is arranged on the outer surface of the first connecting sleeve 2, a second connecting sleeve 3 is arranged on the inner surface wall of the adjusting sleeve 4 near the upper part, a second external thread 31 is arranged on the outer surface of the second connecting sleeve 3, a first internal thread 42 is arranged on the inner surface wall of the adjusting sleeve 4 near the lower part, and a second internal thread 4 is arranged on the inner surface wall of the adjusting sleeve 4 near the upper part. 3. A limiting mechanism 5 is arranged between the inner surface walls of the first connecting sleeve 2 and the second connecting sleeve 3. The first internal thread 42 matches the first external thread 21, and the second internal thread 43 matches the second external thread 31. The limiting mechanism 5 includes a plurality of connecting blocks 501. The plurality of connecting blocks 501 are fixedly connected to the inner surface wall of the first connecting sleeve 2 at equal intervals near the bottom. A sliding rod 502 is fixedly connected to the top of the connecting block 501. A sliding sleeve on the outer surface of the sliding rod 502 is provided with a limiting block 503. The limiting block 503 is fixedly connected to the inner surface wall of the second connecting sleeve 3 near the top.

[0026] The effect achieved by the entire embodiment 1 is that when the device is in use, by rotating the adjusting sleeve 4 forwardly, since the sliding rod 502 connected to the first connecting sleeve 2 through the connecting block 501 on the inner wall thereof slides through the limit block 503 on the inner wall of the second connecting sleeve 3, the first connecting sleeves 2 cannot rotate relative to each other, and when the adjusting sleeve 4 rotates, the first internal thread 42 inside and the first external thread 21 outside the first connecting sleeve 2 cooperate to drive the first connecting sleeve 2 to move downward, and the second internal thread 43 inside the adjusting sleeve 4 and the second external thread 31 outside the second connecting sleeve 3 cooperate to drive the second connecting sleeve 3 to move upward, thereby playing the role of adjusting the overall length of the device, and rotating the adjusting sleeve 4 in the opposite direction can shorten the overall length of the device, and the overall structure is simple, and the overall length of the shock absorber can be easily adjusted to adapt to other devices without professional knowledge, and the use convenience is relatively high.

[0027] Embodiment 2, as Figure 1-Figure 6 As shown, the top of the first connecting sleeve 2 is bonded and connected to the first buffer pad 22, the bottom of the second connecting sleeve 3 is bonded and connected to the second buffer pad 33, a fixing bolt 44 is installed on the outer surface of the adjusting sleeve 4 near the top, the end of the fixing bolt 44 is in conflict with the outer surface of the second connecting sleeve 3, the outer surface of the adjusting sleeve 4 is fixedly connected to a hexagonal sleeve 41 near the middle, the top of the second connecting sleeve 3 is fixedly connected to a connecting head 32, and the top of the sliding rod 502 is fixedly connected to an anti-slip head 504.

[0028] The effect achieved by the entire embodiment 2 is that the connecting head 32 is mainly used for installing the hanging ear or other connecting parts. The first buffer pad 22 and the second buffer pad 33 are provided so that the first connecting sleeve 2 and the second connecting sleeve 3 have a buffering effect when they touch each other, thereby avoiding forced squeezing and collision to cause damage to the first connecting sleeve 2 and the second connecting sleeve 3. The hexagonal sleeve 41 is provided to facilitate the rotation of the adjustment sleeve 4. The anti-detachment head 504 is provided to limit the maximum adjustment distance between the second connecting sleeve 3 and the first connecting sleeve 2 to avoid the two from detaching from each other. When the length adjustment of the device is completed, the fixing bolt 44 is rotated and tightened so that its end is against the outer surface of the second connecting sleeve 3 to play a fixing role and avoid self-rotation during shaking.

[0029] Working principle: When the device is in use, by rotating the adjusting sleeve 4 forwardly, since the sliding rod 502 connected to the first connecting sleeve 2 through the connecting block 501 on the inner wall thereof slides through the limit block 503 on the inner wall of the second connecting sleeve 3, the first connecting sleeve 2 cannot rotate relative to each other. When the adjusting sleeve 4 rotates, the first internal thread 42 inside and the first external thread 21 outside the first connecting sleeve 2 cooperate to drive the first connecting sleeve 2 to move downward, while the second internal thread 43 inside the adjusting sleeve 4 and the second external thread 31 outside the second connecting sleeve 3 cooperate to drive the second connecting sleeve 3 to move upward, thereby playing a role in adjusting the overall length of the device. When the adjusting sleeve 4 is rotated in the opposite direction, the overall length of the device can be shortened. The overall structure is simple, and the overall length of the shock absorber can be easily adjusted to adapt to other devices without professional knowledge. The use convenience is high. In addition, the hexagonal sleeve 41 is provided to facilitate the rotation of the adjusting sleeve 4, and the first buffer pad 22 and the second buffer pad 33 are provided to provide a buffering effect when the first connecting sleeve 2 and the second connecting sleeve 3 touch each other.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A hollow piston rod of a shock absorber, comprising a piston rod body (1), characterized in that: The top end of the piston rod body (1) is fixedly connected with a first connecting sleeve (2), the outer surface of the first connecting sleeve (2) is provided with a first external thread (21), the outer surface of the first connecting sleeve (2) is provided with an adjusting sleeve (4), the inner surface wall of the adjusting sleeve (4) is provided with a second connecting sleeve (3) near the top, the outer surface of the second connecting sleeve (3) is provided with a second external thread (31), the inner surface wall of the adjusting sleeve (4) is provided with a first internal thread (42) near the bottom, the inner surface wall of the adjusting sleeve (4) is provided with a second internal thread (43) near the top, and a limiting mechanism (5) is provided between the inner surface walls of the first connecting sleeve (2) and the second connecting sleeve (3).

2. The hollow piston rod of the shock absorber according to claim 1, characterized in that: The first internal thread (42) matches the first external thread (21), and the second internal thread (43) matches the second external thread (31).

3. The hollow piston rod of the shock absorber according to claim 2, characterized in that: The limiting mechanism (5) comprises a plurality of connection blocks (501), wherein the plurality of connection blocks (501) are fixedly connected to the inner surface wall of the first connection sleeve (2) at equal distances and close to the bottom, and a sliding rod (502) is fixedly connected to the top of the connection block (501).

4. The hollow piston rod of the shock absorber according to claim 3, characterized in that: The sliding sleeve on the outer surface of the sliding rod (502) is provided with a limit block (503), and the limit block (503) is fixedly connected to a position close to the top of the inner surface wall of the second connecting sleeve (3).

5. The hollow piston rod of the shock absorber according to claim 4, characterized in that: The top of the first connecting sleeve (2) is bonded to a first buffer pad (22), and the bottom of the second connecting sleeve (3) is bonded to a second buffer pad (33).

6. The hollow piston rod of the shock absorber according to claim 5, characterized in that: A fixing bolt (44) is installed at a position close to the top of the outer surface of the adjustment sleeve (4), and the end of the fixing bolt (44) is in conflict with the outer surface of the second connection sleeve (3).

7. The hollow piston rod of the shock absorber according to claim 6, characterized in that: A hexagonal sleeve (41) is fixedly connected to the outer surface of the adjustment sleeve (4) near the middle, a connecting head (32) is fixedly connected to the top of the second connecting sleeve (3), and an anti-slip head (504) is fixedly connected to the top of the sliding rod (502).

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