Front spacer bush assembly

Abstract

The front spacer bush assembly comprises a spacer bush body and a sealing ring, the sealing ring is arranged at the upper end of the spacer bush body in a sleeved mode and tightly attached to the spacer bush body, a through hole is formed in the center of the spacer bush body in the axial direction, and a plurality of first protruding points are arranged on the upper end face of the sealing ring in the circumferential direction. A plurality of second protruding points are arranged on the outer side wall of the sealing ring in the circumferential direction and protrude out of the outer side wall of the spacer bush body, a plurality of third protruding points are arranged on the upper end face of the spacer bush body in the circumferential direction, the first protruding points protrude out of the third protruding points, and the hardness of the first protruding points is smaller than that of the third protruding points. The first salient points are firstly contacted with the third salient points, so that the contact area is reduced, the impact sound is reduced, the noise is reduced, the first salient points are soft and play a role in buffering and damping, the spring generates radial deformation when being stressed and compressed, and the second salient points are arranged to be contacted with the inner wall of the cylinder barrel, so that the contact area is reduced, and the impact sound is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, and particularly relates to a front spacer assembly. Background Art

[0002] The balance bar is a product that combines mechanical springs and gas springs, and is a damping device with a telescopic auxiliary support function, which is widely used in the rear door of automobiles. During the opening and closing processes of the rear door of an automobile, the balance bar cooperates with an electric strut to achieve the hovering of the rear door at any position during the opening process and assist in supporting the rear door. For example, a kind of automobile balance bar disclosed in a Chinese patent application (publication number: CN220889876U) includes a cylinder barrel, a piston assembly, a piston rod and a spring. One end of the piston rod is fixedly connected to the piston assembly, and the other end of the piston rod extends out of the front end of the cylinder barrel. The spring is in clearance fit with the inner wall of the cylinder barrel. A front spacer and a rear spacer are respectively arranged in the cylinder barrel. The front spacer is movably arranged in the cylinder barrel, and a guide ring that is in sliding fit with the inner wall of the cylinder barrel is sleeved on the front spacer. The rear spacer is fixedly arranged at the rear end of the cylinder barrel, and the spring abuts between the front spacer and the rear spacer. Through the optimization and improvement of the installation structure of the spring, it not only effectively ensures that the spring is not prone to crosstalk in the cylinder barrel, but also makes the spring not have an undesired radial offset deformation when being compressed, thereby ensuring the force value stability of the spring and avoiding the occurrence of abnormal noise.

[0003] However, in the above-mentioned automobile balance bar, when the piston assembly contacts the front spacer, the contact area between the two is large, which will generate a relatively obvious impact sound, thus generating noise. This kind of impact may also affect the service life of the automobile balance bar, so it is necessary to make improvements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a front spacer assembly aiming at the defects and deficiencies of the prior art, which has a simple and reasonable structure and is convenient to operate. By reducing the contact area during collision, the impact sound is reduced and the noise is lowered.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A front spacer assembly of the utility model includes a spacer body and a sealing ring. The sealing ring is sleeved on the upper end of the spacer body and is closely attached to the spacer body. A through hole is axially arranged along the center of the spacer body. A plurality of first bumps are arranged on the upper end surface of the sealing ring along the circumferential direction, and a plurality of second bumps are arranged on the outer side wall of the sealing ring along the circumferential direction. The second bumps protrude from the outer side wall of the spacer body. A plurality of third bumps are arranged on the upper end surface of the spacer body along the circumferential direction. The first bumps protrude from the third bumps, and the hardness of the first bumps is less than that of the third bumps.

[0007] Further, the sealing ring includes an outer ring portion and an inner ring portion. The outer ring portion is sleeved on the outer side wall of the spacer sleeve body. The inner ring portion is located at the upper end of the through hole. The outer ring portion and the inner ring portion are connected by a plurality of connecting portions. A plurality of limiting grooves for limiting cooperation with the connecting portions are provided on the upper end surface of the spacer sleeve body. The first bump is provided on the upper end surface of the connecting portion, and the second bump is provided on the outer side wall of the outer ring portion.

[0008] Further, the connecting portion extends radially along the inner ring portion.

[0009] Further, an annular groove is provided on the outer side wall of the spacer sleeve body, and the outer ring portion is sleeved in the annular groove.

[0010] Further, the sealing ring is made of hydrogenated nitrile rubber material.

[0011] Further, the spacer sleeve body is made of plastic material.

[0012] Further, a plurality of grooves communicating with the through hole are provided on the upper end surface of the spacer sleeve body along the circumferential direction.

[0013] Further, an avoidance inclined surface is provided at the upper end of the spacer sleeve body corresponding to the through hole, and the avoidance inclined surface inclines towards the inner side of the spacer sleeve body.

[0014] Further, a plurality of first recessed portions are provided on the outer side wall of the spacer sleeve body, and the first recessed portions are recessed towards the center of the spacer sleeve body.

[0015] Further, a plurality of second recessed portions corresponding to and cooperating with the first recessed portions are provided on the outer side wall of the outer ring portion, and the second recessed portions are recessed towards the center of the outer ring portion.

[0016] The beneficial effects of the present utility model are as follows: For a front spacer sleeve assembly described in the present utility model, it is movably arranged in the cylinder barrel and abuts against the spring in the cylinder barrel. When the piston assembly in the cylinder barrel contacts the front spacer sleeve assembly, it first contacts the first bump and then contacts the third bump, which can effectively reduce the contact area between the piston assembly and the front spacer sleeve assembly, reduce the impact sound, and lower the noise. The first bump is relatively soft and can play a role in buffering and shock absorption, further reducing the sound caused by the impact.

[0017] When the piston assembly presses down the front spacer sleeve assembly to compress the spring, the spring is prone to radial deformation under force, and then drives the front spacer sleeve assembly to contact the inner wall of the cylinder barrel. By providing the second bump, the second bump contacts the inner wall of the cylinder barrel, which can effectively reduce the contact area between the front spacer sleeve assembly and the inner wall of the cylinder barrel, reduce the impact sound, and lower the noise. Description of the Drawings

[0018] Figure 1It is a schematic structural view of the present utility model;

[0019] Figure 2 It is a schematic exploded structural view of the present utility model;

[0020] Figure 3 It is a schematic cross-sectional structural view of the present utility model.

[0021] Figures 1-3 In the figure: 1. spacer body; 11. through hole; 12. third bump; 13. limiting groove; 14. annular groove; 15. recess; 16. avoiding inclined surface; 17. first recessed part; 2. sealing ring; 21. outer ring part; 211. second bump; 212. second recessed part; 22. inner ring part; 23. connecting part; 231. first bump. Specific embodiments

[0022] The present utility model will be further described below with reference to the accompanying drawings.

[0023] As Figures 1-3 shown, a front spacer assembly is applied to an automotive stabilizer bar. The automotive stabilizer bar includes a cylinder barrel, a piston assembly, a piston rod, and a spring. The piston rod is fixedly connected to the piston assembly. The piston assembly is movably arranged in the cylinder barrel and divides the inner cavity of the cylinder barrel into a rod chamber and a rodless chamber. The spring is arranged in the rodless chamber and is in clearance fit with the inner wall of the cylinder barrel. The front spacer assembly of the present utility model is movably arranged in the rodless chamber and is in clearance fit with the inner wall of the cylinder barrel. The spring abuts against the front spacer assembly. When the piston assembly presses down, it first contacts the front spacer assembly and then presses down the spring. The front spacer assembly can effectively prevent the spring from radially deflecting and deforming during compression and extension, ensuring the force value stability of the spring.

[0024] A front spacer assembly according to the present utility model includes a spacer body 1 and a sealing ring 2. The sealing ring 2 is sleeved on the upper end of the spacer body 1 and is in close fit with the spacer body 1. A through hole 11 is axially provided in the center of the spacer body 1 to allow fluids or other media to pass through. A plurality of first bumps 231 are provided on the upper end surface of the sealing ring 2 along the circumferential direction. Specifically, 4 first bumps 231 are provided. The first bumps 231 protrude upward along the axial direction of the sealing ring 2. A plurality of second bumps 211 are provided on the outer side wall of the sealing ring 2 along the circumferential direction. The second bumps 211 protrude outward along the radial direction of the sealing ring 2. The second bumps 211 protrude beyond the outer side wall of the spacer body 1. A plurality of third bumps 12 are provided on the upper end surface of the spacer body 1 along the circumferential direction. Specifically, 8 third bumps 12 are provided. The third bumps 12 protrude upward along the axial direction of the spacer body 1. The first bumps 231 protrude beyond the third bumps 12. The hardness of the first bumps 231 is less than that of the third bumps 12. When the piston assembly contacts the front spacer assembly, it first contacts the first bumps 231 and then the third bumps 12, which can effectively reduce the contact area between the piston assembly and the front spacer assembly, reduce the impact sound, and lower the noise. The first bumps 231 are relatively soft and can play a role in buffering and shock absorption, further reducing the sound caused by the impact.

[0025] When the piston assembly presses down the front spacer assembly to compress the spring, the spring is prone to radial deformation under force, which in turn drives the front spacer assembly to contact the inner wall of the cylinder barrel. By providing the second bumps 211, the second bumps 211 are in contact with the inner wall of the cylinder barrel, which can effectively reduce the contact area between the front spacer assembly and the inner wall of the cylinder barrel, reduce the impact sound, and lower the noise.

[0026] Preferably, in this embodiment, the sealing ring 2 is made of hydrogenated nitrile rubber material. The first bumps 231 and the second bumps 211 are integrally formed with the sealing ring 2. Hydrogenated nitrile rubber is obtained by hydrogenating nitrile rubber. The hydrogenation process saturates the unsaturated bonds in nitrile rubber with hydrogen atoms, thus forming a highly saturated special elastomer. Hydrogenated nitrile rubber has excellent heat resistance, oil resistance, and aging resistance, which can effectively improve the service life of the sealing ring 2.

[0027] Preferably, in this embodiment, the spacer body 1 is made of plastic material. The third bumps 12 are integrally formed with the spacer body 1. Plastic is convenient to process, has a low cost, and has good corrosion resistance, which is beneficial to extending the service life of the spacer body 1.

[0028] Preferably, in this embodiment, the sealing ring 2 includes an outer ring portion 21 and an inner ring portion 22. The outer ring portion 21 is sleeved on the outer side wall of the spacer sleeve body 1. Preferably, in this embodiment, a ring groove 14 is provided on the outer side wall of the spacer sleeve body 1, and the outer ring portion 21 is sleeved in the ring groove 14, which can effectively prevent the outer ring portion 21 from undergoing unnecessary displacement or detachment during use, affecting the use. The inner ring portion 22 is located at the upper end of the through hole 11. The outer ring portion 21 and the inner ring portion 22 are connected by a plurality of connecting portions 23. Preferably, in this embodiment, the connecting portions 23 extend radially along the inner ring portion 22, so that the connecting portions 23 can more firmly connect the inner ring portion 22 and the outer ring portion 21. A plurality of limiting grooves 13 for limiting cooperation with the connecting portions 23 are provided on the upper end surface of the spacer sleeve body 1, which plays a limiting role, making it difficult for the sealing ring 2 to shift and detach from the spacer sleeve body 1. The first bump 231 is provided on the upper end surface of the connecting portion 23, and the second bump 211 is provided on the outer side wall of the outer ring portion 21.

[0029] Preferably, in this embodiment, referring to Figure 3 , a plurality of grooves 15 communicating with the through hole 11 are provided on the upper end surface of the spacer sleeve body 1 along the circumferential direction, increasing the flow rate. Through these grooves 15, fluids or other media can pass through the spacer sleeve body 1 more smoothly.

[0030] Preferably, in this embodiment, a relief slope 16 is provided at the upper end of the spacer sleeve body 1 corresponding to the through hole 11. The relief slope 16 inclines towards the inside of the spacer sleeve body 1, which can reduce the use of materials and reduce the weight. A riveting head is provided at the end of the piston rod. When the piston rod moves downward, the riveting head will drill into the spacer sleeve body 1, and the relief slope 16 plays a role of avoidance.

[0031] Preferably, in this embodiment, a plurality of first recessed portions 17 are provided on the outer side wall of the spacer sleeve body 1, and the first recessed portions 17 are recessed towards the center of the spacer sleeve body 1. Preferably, in this embodiment, a plurality of second recessed portions 212 corresponding to the first recessed portions 17 are provided on the outer side wall of the outer ring portion 21, and the second recessed portions 212 are recessed towards the center of the outer ring portion 21. By providing the first recessed portions 17 and the second recessed portions 212, fluids or other media can pass through the front spacer assembly more smoothly, effectively reducing the noise and vibration generated when the fluids or other media pass through.

[0032] The above are only the preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A front spacer assembly, characterized in that: It includes a spacer sleeve body (1) and a sealing ring (2). The sealing ring (2) is sleeved on the upper end of the spacer sleeve body (1) and is in close fit with the spacer sleeve body (1). A through hole (11) is axially provided in the center of the spacer sleeve body (1). A plurality of first bumps (231) are provided on the upper end surface of the sealing ring (2) along the circumferential direction. A plurality of second bumps (211) are provided on the outer side wall of the sealing ring (2) along the circumferential direction. The second bumps (211) protrude from the outer side wall of the spacer sleeve body (1). A plurality of third bumps (12) are provided on the upper end surface of the spacer sleeve body (1) along the circumferential direction. The first bumps (231) protrude from the third bumps (12), and the hardness of the first bumps (231) is less than the hardness of the third bumps (12).

2. The front spacer sleeve assembly according to claim 1, wherein: The sealing ring (2) includes an outer ring portion (21) and an inner ring portion (22). The outer ring portion (21) is sleeved on the outer side wall of the spacer sleeve body (1). The inner ring portion (22) is located at the upper end of the through hole (11). The outer ring portion (21) and the inner ring portion (22) are connected by a plurality of connecting portions (23). A plurality of limiting grooves (13) for limiting and cooperating with the connecting portions (23) are provided on the upper end surface of the spacer sleeve body (1). The first bumps (231) are provided on the upper end surface of the connecting portions (23). The second bumps (211) are provided on the outer side wall of the outer ring portion (21).

3. The front spacer assembly according to claim 2, characterized in that: The connecting portion (23) extends radially along the inner ring portion (22).

4. The front spacer assembly according to claim 2, characterized in that: A ring groove (14) is provided on the outer side wall of the spacer sleeve body (1), and the outer ring portion (21) is sleeved in the ring groove (14).

5. A front spacer assembly according to claim 1, characterized in that: The sealing ring (2) is made of hydrogenated nitrile rubber material.

6. The front spacer assembly according to claim 1, characterized in that: The spacer sleeve body (1) is made of plastic material.

7. A front spacer assembly according to claim 1, characterized in that: A plurality of grooves (15) communicating with the through hole (11) are provided on the upper end surface of the spacer sleeve body (1) along the circumferential direction.

8. A front spacer assembly according to claim 1, characterized in that: An avoidance inclined surface (16) is provided at the upper end of the spacer sleeve body (1) corresponding to the through hole (11), and the avoidance inclined surface (16) inclines towards the inside of the spacer sleeve body (1).

9. The front spacer sleeve assembly according to claim 2, wherein: A plurality of first recessed portions (17) are provided on the outer side wall of the spacer sleeve body (1), and the first recessed portions (17) are recessed towards the center of the spacer sleeve body (1).

10. A front spacer assembly according to claim 9, characterized in that: A plurality of second recessed portions (212) corresponding to and cooperating with the first recessed portions (17) are provided on the outer side wall of the outer ring portion (21), and the second recessed portions (212) are recessed towards the center of the outer ring portion (21).

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