A shock-absorbing and noise-reducing piston rod

Abstract

The utility model discloses a kind of shock-absorbing and noise-reducing piston rods, including piston rod, cylinder barrel, first spring and support plate, piston is equipped with in piston rod outer lower end, piston rod is slidably arranged in cylinder barrel by piston, cylinder barrel is filled with hydraulic oil, support plate is fixedly arranged on piston rod upper end, first spring is arranged between support plate and cylinder barrel, support plate edge is provided with first soundproof cover body, cylinder barrel bottom end is equipped with mounting plate, mounting plate edge is equipped with second soundproof cover body, first soundproof cover body is slidably arranged in second soundproof cover body.The utility model has the advantages that: it is equipped with first soundproof cover and second soundproof cover, can block the noise generated when piston rod acts;First soundproof cover protects piston rod inside, avoid piston rod and external object contact and produce scratch, burr etc.;When vibration is smaller, provide damping by hydraulic oil and first spring, when vibration is larger, provide damping by hydraulic oil, first spring and second spring, have two-stage damping, give consideration to comfort and stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorption technology, and in particular to a shock-absorbing and noise-reducing piston rod. Background Technology

[0002] During vehicle operation, the shock absorption system plays a crucial role, and the shock absorber piston rod, as the core component of the shock absorption system, directly affects the vehicle's driving comfort, handling stability, and the service life of its parts. In the shock-absorbing piston rod, an oil seal and a guide sleeve are usually installed on the cylinder. During the extension and retraction of the piston rod, the piston rod will rub against the oil seal or guide sleeve, which will generate noise. In addition, as the service time increases, since the piston rod is exposed, scratches, burrs and other defects may appear on the surface of the piston rod, which will further increase the noise of the shock-absorbing piston rod. Summary of the Invention

[0003] This utility model mainly solves the above-mentioned problems and provides a shock-absorbing and noise-reducing piston rod. A first soundproof cover and a second soundproof cover are set outside the piston rod and cylinder to block the noise generated when the piston rod moves. At the same time, it can also protect the piston rod and prevent the piston rod from contacting foreign objects and causing scratches, burrs, etc.

[0004] The technical solution adopted by this utility model to solve its technical problem is a shock-absorbing and noise-reducing piston rod, including a piston rod, a cylinder, a first spring, and a support plate. A piston is provided at the lower outer end of the piston rod. The piston rod is slidably disposed in the cylinder through the piston. The cylinder is filled with hydraulic oil. The support plate is fixedly disposed at the upper end of the piston rod. The first spring is disposed between the support plate and the cylinder. A first sound insulation cover is provided at the edge of the support plate. A mounting plate is provided at the bottom end of the cylinder. A second sound insulation cover is provided at the edge of the mounting plate. The first sound insulation cover is slidably disposed in the second sound insulation cover.

[0005] As a preferred embodiment of the above solution, a gap is left between the first soundproof cover and the outer wall of the cylinder.

[0006] As a preferred embodiment of the above solution, the inner wall of the first soundproof enclosure is provided with sound-absorbing cotton.

[0007] As a preferred embodiment of the above solution, the outer wall of the second soundproof cover is provided with sound-absorbing cotton.

[0008] As a preferred embodiment of the above solution, the cylinder is fitted with a second spring and an annular plate, the second spring being located between the annular plate and the mounting plate, and the annular plate being slidably connected to the cylinder.

[0009] As a preferred embodiment of the above solution, when the first spring is not deformed, a gap is left between the annular plate and the first soundproof cover.

[0010] As a preferred embodiment of the above solution, the annular plate is provided with a first air hole, and a turbulence-preventing dust net is provided in the first air hole.

[0011] As a preferred embodiment of the above solution, the lower side of the second soundproof cover is provided with a second air hole, and the second air hole is provided with a turbulence-preventing dustproof net.

[0012] As a preferred embodiment of the above solution, the piston rod is a hollow rod.

[0013] The advantages of this utility model are: it is equipped with a first soundproof cover and a second soundproof cover, which can block the noise generated when the piston rod moves; the first soundproof cover protects the piston rod inside, preventing the piston rod from contacting external objects and causing scratches, burrs, etc.; when the vibration is small, the hydraulic oil and the first spring provide damping, and when the vibration is large, the hydraulic oil, the first spring and the second spring provide damping, which has two levels of damping, taking into account both comfort and stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the vibration damping and noise reduction piston rod in the embodiment.

[0015] 1-Piston rod 2-Cylinder 3-Support plate 4-First spring 5-First soundproof cover 6-Mounting plate 7-Second soundproof cover 8-Annular plate 9-Second spring 10-Second vent 11-First vent Detailed Implementation

[0016] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0017] Example: This embodiment describes a shock-absorbing and noise-reducing piston rod, such as... Figure 1As shown, the assembly includes a piston rod 1, a cylinder 2, a spring 4, and a support plate 3. A piston is located at the lower outer end of the piston rod 1. The piston rod 1 is slidably mounted in the cylinder 2 via the piston, which divides the cylinder into an upper chamber and a lower chamber. An oil passage hole is provided on the piston, connecting the upper and lower chambers. The cylinder 2 is filled with hydraulic oil. The support plate 3 is fixedly mounted on the upper end of the piston rod 1. The first spring 4 is positioned between the support plate 3 and the cylinder 2. A first soundproof cover 5 is located on the edge of the support plate 3. A mounting plate 6 is located at the bottom of the cylinder 2, and a second soundproof cover 7 is located on the edge of the mounting plate 6. The first soundproof cover 5 is slidably mounted within the second soundproof cover 7. A gap is left between the first soundproof cover 5 and the outer wall of the cylinder 2. Sound-absorbing cotton is provided on the inner wall of the first soundproof cover 5 and the outer wall of the second soundproof cover 7. The first soundproof cover 5 and the second soundproof cover 7 together enclose the piston rod 1 and the cylinder 2, and work with the sound-absorbing cotton to reduce the noise generated when the piston rod and cylinder move. At the same time, they can also protect the piston rod 1 and the cylinder 2, and prevent the piston rod 1 from being scratched or burred by collisions with external objects.

[0018] Furthermore, a second spring 9 and an annular plate 8 are fitted around the cylinder 2. The second spring 9 is located between the annular plate 8 and the mounting plate 6, and the annular plate 8 is slidably connected to the cylinder. When the first spring 4 is not deformed, there is a gap between the annular plate 8 and the lower end of the first sound insulation cover 5. When the vehicle experiences slight vibrations, the hydraulic oil absorbs some energy through its viscous flow, while the first spring undergoes elastic deformation, further dissipating vibration energy and effectively mitigating vibration transmission, ensuring the smooth operation of the vehicle. When facing larger vibrations, the second spring begins to function, sharing the damping task with the first spring and enhancing the shock absorption effect. This two-stage damping design allows the vehicle to exhibit good performance when dealing with vibrations of varying intensities, ensuring both user comfort and equipment stability, and extending its service life.

[0019] Furthermore, a first air hole 11 is provided on the annular plate 8, and a second air hole 10 is provided on the lower side of the second soundproof cover. Both the first and second air holes are equipped with turbulence-preventing dustproof nets. The arrangement of the first air hole 11 and the second air hole 10 ensures that the internal air pressure of the cavity formed by the first soundproof cover 5 and the second soundproof cover 6 is the same as the external air pressure when the piston rod 1 extends or retracts. This prevents the first or second soundproof cover 5 from deforming due to excessive internal air pressure. The turbulence-preventing dustproof nets prevent external dust from entering the first and second soundproof covers and also disrupt airflow, preventing noise from being generated when air passes through the first and second air holes.

[0020] In addition, the piston rod 1 in this embodiment can be a hollow rod, which can reduce the overall weight of the shock-absorbing and noise-reducing piston rod.

[0021] In this embodiment, the vibration-damping and noise-reducing piston rod is equipped with a first soundproof cover and a second soundproof cover to effectively block the noise generated during piston rod operation. The first soundproof cover completely protects the piston rod, preventing it from contacting external objects and thus avoiding scratches, burrs, and other problems. When the vibration is small, damping is mainly provided by hydraulic oil and the first spring; while when the vibration is large, damping is provided by hydraulic oil, the first spring, and the second spring together, forming a two-stage damping system that ensures both operational comfort and overall stability.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention 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 the invention or exceeding the scope defined by the appended claims.

Claims

1. A shock-absorbing and noise-reducing piston rod, characterized in that: The device includes a piston rod, a cylinder, a first spring, and a support plate. A piston is provided at the lower outer end of the piston rod, and the piston rod is slidably disposed in the cylinder through the piston. The cylinder is filled with hydraulic oil. The support plate is fixedly disposed at the upper end of the piston rod. The first spring is disposed between the support plate and the cylinder. A first sound insulation cover is provided at the edge of the support plate. A mounting plate is provided at the bottom end of the cylinder, and a second sound insulation cover is provided at the edge of the mounting plate. The first sound insulation cover is slidably disposed in the second sound insulation cover.

2. The shock-absorbing and noise-reducing piston rod according to claim 1, characterized in that: A gap is left between the first soundproof cover and the outer wall of the cylinder.

3. The shock-absorbing and noise-reducing piston rod according to claim 1 or 2, characterized in that: The inner wall of the first soundproof enclosure is lined with sound-absorbing cotton.

4. The shock-absorbing and noise-reducing piston rod according to claim 1, characterized in that: The outer wall of the second soundproof cover is provided with sound-absorbing cotton.

5. The shock-absorbing and noise-reducing piston rod according to claim 1, characterized in that: The cylinder is fitted with a second spring and an annular plate. The second spring is located between the annular plate and the mounting plate. The annular plate is slidably connected to the cylinder.

6. The shock-absorbing and noise-reducing piston rod according to claim 5, characterized in that: When the first spring is not deformed, there is a gap between the annular plate and the first soundproof cover.

7. The shock-absorbing and noise-reducing piston rod according to claim 5, characterized in that: The annular plate is provided with a first air hole, and a turbulence-preventing dust net is provided in the first air hole.

8. The shock-absorbing and noise-reducing piston rod according to claim 5, characterized in that: The second soundproof cover has a second air hole on its lower side, and a turbulence-preventing dustproof net is provided in the second air hole.

9. The shock-absorbing and noise-reducing piston rod according to claim 1, characterized in that: The piston rod is a hollow rod.

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