Protective clamping cap for oil cylinder of automobile shock absorber

Abstract

The utility model relates to a protective clamping cap for an oil cylinder of an automobile shock absorber. The protective clamping cap is characterized by comprising a clamping cap part and a protective shell which are integrally formed, the clamping cap part is provided with an annular clamping cavity with a lower opening and used for being connected with an oil sealing opening of an oil cylinder in a clamping mode. An avoiding hole is formed in the center of the top of the clamping cavity, and a piston rod of the oil cylinder penetrates through the avoiding hole; the protective shell is fixedly connected to the lower end of the clamping cap part, the protective shell is provided with a protective cavity which is provided with a lower opening and is coaxial with the clamping cavity, and when the clamping cavity is connected with the oil sealing opening of the oil cylinder in a clamping mode, the protective shell surrounds the cylinder body of the oil cylinder to form protection. The clamping cap part can protect the oil seal, so that the buffer block is prevented from being directly contacted and extruded with the oil seal, and the sealing performance of the oil seal is effectively prevented from being damaged; the protective shell can prevent the lower end of the dust cover from directly scraping the cylinder body of the oil cylinder, the problems that the dust cover and the cylinder body are scratched and abraded and noise is caused are solved, and the service life of the dust cover and the service life of the oil cylinder are effectively prolonged.

Description

A protective cap for automotive shock absorber cylinders Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a protective cap for automotive shock absorber cylinders. Background Technology

[0002] With the development of the times, automobiles have become an indispensable part of modern life, and the shock absorbers in the front strut assembly of automobiles are important components in the process of automobile driving. Automobile shock absorbers can quickly attenuate the vibration between the wheels and the body, and improve the smoothness and comfort of automobile driving.

[0003] Because shock absorbers operate in harsh environments, dust covers are typically integrated with buffer blocks located on top of the piston rod. The dust cover extends downwards to the cylinder body, covering the piston rod and oil seal. This prevents mud, sand, dust, and other contaminants from entering the oil seal of the shock absorber cylinder or adhering to the piston rod, thus preventing oil seal failure, piston rod jamming, cylinder oil leakage, and attenuation or loss of shock absorption function.

[0004] However, in the above installation method, when the piston rod moves up and down, on the one hand, the dust cover moves up and down with it, and its lower end is prone to deflection and scrape the cylinder body, causing scratches and wear on the dust cover and cylinder body, and also causing noise. On the other hand, the buffer block directly contacts and squeezes the oil seal, which can easily cause the sealing lip of the oil seal to be crushed, lifted or torn, directly damaging the sealing performance.

[0005] Therefore, it is necessary to research a protective cap for automotive shock absorber cylinders. Summary of the Invention

[0006] Therefore, the purpose of this utility model is to provide a protective cap for automotive shock absorber cylinders, which can effectively solve the problems of dust covers scraping the cylinder body and buffer blocks directly contacting and squeezing the oil seal.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A protective cap for automotive shock absorber cylinders includes an integrally molded cap portion and a protective shell;

[0009] The cap has an annular snap-fit ​​cavity with a downward opening for snap-fit ​​connection with the oil seal of the oil cylinder; a clearance hole is provided at the center of the top of the snap-fit ​​cavity for the piston rod of the oil cylinder to pass through.

[0010] The protective shell is fixedly connected to the lower end of the cap. The protective shell has a protective cavity with a lower opening that is coaxial with the snap-fit ​​cavity. When the snap-fit ​​cavity is snap-fitted to the oil seal of the oil cylinder, the protective shell surrounds the cylinder body of the oil cylinder to form protection.

[0011] Furthermore, the snap-fit ​​cavity has a stepped structure that is smaller at the top and larger at the bottom, including a reinforcing cavity and a mating cavity. The reinforcing cavity is located above the mating cavity and its inner diameter is smaller than that of the mating cavity. The mating cavity is used for interference fit connection with the oil seal of the oil cylinder.

[0012] Several reinforcing plates are fixedly connected in an annular interval between the inner wall and the top wall of the reinforcing cavity.

[0013] Furthermore, the reinforcing cavity is provided with an exhaust port that communicates with the outside, and the exhaust port is located between two adjacent reinforcing plates.

[0014] Furthermore, the protective shell has a ring structure, including an integrally formed upper ring, lower ring, and ribs; the upper ring is fixedly connected to the lower end of the cap, the lower ring is coaxially distributed at the lower end of the lower ring, and several ribs are fixedly connected circumferentially between the upper ring and the lower ring.

[0015] Furthermore, a break is provided on the lower ring, and the break is located between two adjacent ribs.

[0016] Furthermore, the inner surface of the rib is fixedly connected with vertical reinforcing ribs.

[0017] Furthermore, the reinforcing rib extends upward to the cap portion to reinforce the connection between the rib, the upper ring, and the cap portion.

[0018] The beneficial effects of the above technical solution are:

[0019] This utility model includes an integrally molded cap and a protective shell. The cap has an annular snap-fit ​​cavity with a downward opening for snap-fit ​​connection with the oil seal of the hydraulic cylinder, establishing a connection between the protective cap and the hydraulic cylinder and protecting the oil seal. This prevents the buffer block from directly contacting and squeezing the oil seal, effectively preventing damage to the sealing performance of the oil seal. The protective shell is fixedly connected to the lower end of the cap. The protective shell has a protective cavity with a downward opening coaxial with the snap-fit ​​cavity. When the snap-fit ​​cavity is snap-fitted with the oil seal of the hydraulic cylinder, the protective shell surrounds the cylinder body to form a protective barrier, preventing the lower end of the dust cover from directly scraping the cylinder body. This avoids scratches and wear on the dust cover and cylinder body, as well as noise problems, effectively improving the service life of the dust cover and the hydraulic cylinder. Attached Figure Description

[0020] Figure 1 is a three-dimensional schematic diagram of this utility model;

[0021] Figure 2 is a three-dimensional schematic diagram of the present invention from another direction;

[0022] Figure 3 is a front view of this utility model;

[0023] Figure 4 is a cross-sectional view of this utility model;

[0024] Figure 5 is a bottom view of this utility model;

[0025] Figure 6 is an assembly diagram of this utility model in use.

[0026] Reference numerals in the attached drawings: 1 is the cap, 2 is the protective shell, 3 is the hydraulic cylinder, 4 is the exhaust port, 5 is the reinforcing rib, 6 is the buffer block, 7 is the dust cover, 101 is the snap-fit ​​cavity, 102 is the clearance hole, 103 is the reinforcing cavity, 104 is the mating cavity, 105 is the reinforcing plate, 201 is the protective cavity, 202 is the upper ring, 203 is the lower ring, 204 is the rib, 205 is the break, 301 is the oil seal, 302 is the piston rod, and 303 is the cylinder body. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0028] This embodiment aims to provide a protective cap for automotive shock absorber cylinders, which is mainly used for the protection of automotive shock absorber cylinders, addressing the problem that the dust cover 7 scrapes the cylinder body 303 of the cylinder 3 and the buffer block 6 directly contacts and squeezes the oil seal 301.

[0029] A protective cap for an automotive shock absorber cylinder, as shown in Figures 1 and 2, includes an integrally injection-molded cap portion 1 and a protective shell 2. The cap portion 1 has a downward-opening annular snap-fit ​​cavity 101, as shown in Figure 6, which is interference-fitted to the oil seal 301 of the cylinder 3, establishing a connection between the protective cap and the cylinder 3 and protecting the oil seal 301 from direct impact by the buffer block 6. An clearance hole 102 is provided at the center of the top of the snap-fit ​​cavity 101 to allow the piston rod 302 of the cylinder 3 to pass through.

[0030] The protective shell 2 is integrally fixedly connected to the lower end of the cap part 1. The protective shell 2 has a protective cavity 201 with a lower opening and coaxial with the snap-fit ​​cavity 101, as shown in Figure 6. When the snap-fit ​​cavity 101 is snapped into the oil seal 301 of the oil cylinder 3, the protective shell 2 surrounds the cylinder body 303 of the oil cylinder 3 to form protection, preventing the lower part of the dust cover 7 from directly scraping against the cylinder body 303, protecting the cylinder body 303 and reducing noise.

[0031] Specifically, as shown in Figure 4, the snap-fit ​​cavity 101 has a stepped structure that is smaller at the top and larger at the bottom, including an integrated reinforcing cavity 103 and a mating cavity 104. The reinforcing cavity 103 is located above the mating cavity 104 and its inner diameter is smaller than that of the mating cavity 104. The mating cavity 104 is used for an interference fit connection with the oil seal 301 of the hydraulic cylinder 3. Several reinforcing plates 105 are fixedly connected in an annular interval between the inner wall and the top wall of the reinforcing cavity 103 to structurally reinforce the top of the snap-fit ​​cap 1 in order to cope with the impact from the buffer block 6 above.

[0032] Furthermore, as shown in Figure 3, the reinforcing cavity 103 is provided with an exhaust port 4 that communicates with the outside. The exhaust port 4 is located between two adjacent reinforcing plates 105. When the buffer block 6 impacts the cap part 1, the exhaust port 4 can discharge the gas that enters the snap-fit ​​cavity 101 through the clearance hole 102, so as to balance the air pressure difference inside and outside the snap-fit ​​cavity 101, avoid structural deformation caused by gas compression, and further improve the assembly tightness and operational reliability of the snap-fit ​​cavity 101 and the oil cylinder 3.

[0033] Furthermore, as shown in Figures 1-3, the protective shell 2 has a ring structure, including an integrally formed upper ring 202, lower ring 203 and ribs 204. The upper ring 202 is fixedly connected to the lower end of the cap part 1. The lower ring 203 is coaxially distributed at the lower end of the lower ring 203. Several ribs 204 are fixedly connected circumferentially between the upper ring 202 and the lower ring 203, so that the protective shell 2 forms a hollow structure to reduce cost and weight.

[0034] Furthermore, as shown in the figure, a break 205 is provided on the lower ring 203. The break 205 is located between two adjacent ribs 204. In conjunction with the hollow structure, the continuous connection of the lower part of the protective shell 2 is released, thereby releasing the internal stress generated by the injection molding process, improving the problem of elliptical deformation of the protective shell 2, and increasing the safety of the product during transportation and handling, avoiding the phenomenon of the product cracking due to excessive internal stress.

[0035] Furthermore, as shown in Figures 4 and 5, a vertical reinforcing rib 5 is fixedly connected to the inner surface of the rib 204. The reinforcing rib 5 extends upward to the cap portion 1 to reinforce the connection between the rib 204, the upper ring 202, and the cap portion 1.

Claims

1. A protective cap for an automotive shock absorber cylinder, characterized in that: It includes an integrally molded cap and a protective shell; the cap has an annular snap-fit ​​cavity with a downward opening for snap-fit ​​connection with the oil seal of the hydraulic cylinder; a clearance hole is provided at the center of the top of the snap-fit ​​cavity for the piston rod of the hydraulic cylinder to pass through; the protective shell is fixedly connected to the lower end of the cap, and the protective shell has a protective cavity with a downward opening coaxial with the snap-fit ​​cavity. When the snap-fit ​​cavity is snap-fit ​​connected with the oil seal of the hydraulic cylinder, the protective shell surrounds the cylinder body of the hydraulic cylinder to form protection.

2. A protective cap for an automotive shock absorber cylinder according to claim 1, characterized in that: The snap-fit ​​cavity has a stepped structure that is smaller at the top and larger at the bottom, including a reinforcing cavity and a mating cavity. The reinforcing cavity is located above the mating cavity and its inner diameter is smaller than that of the mating cavity. The mating cavity is used for interference fit connection with the oil seal of the oil cylinder. Several reinforcing plates are fixedly connected in an annular interval between the inner wall and the top wall of the reinforcing cavity.

3. A protective cap for an automotive shock absorber cylinder according to claim 2, characterized in that: The reinforcing cavity is provided with an exhaust port that communicates with the outside, and the exhaust port is located between two adjacent reinforcing plates.

4. A protective cap for an automotive shock absorber cylinder according to any one of claims 1-3, characterized in that: The protective shell has a ring structure, including an integrally formed upper ring, lower ring, and ribs; the upper ring is fixedly connected to the lower end of the cap, the lower ring is coaxially distributed at the lower end of the lower ring, and several ribs are fixedly connected at circumferential intervals between the upper ring and the lower ring.

5. A protective cap for an automotive shock absorber cylinder according to claim 4, characterized in that: A break is provided on the lower ring, and the break is located between two adjacent ribs.

6. A protective cap for an automotive shock absorber cylinder according to claim 4, characterized in that: The inner surface of the rib is fixedly connected with a vertical reinforcing rib.

7. A protective cap for an automotive shock absorber cylinder according to claim 6, characterized in that: The reinforcing rib extends upward to the cap portion to reinforce the connection between the rib, the upper ring, and the cap portion.

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