Self-suction type hydraulic spring buffer

Abstract

The utility model relates to a self-suction type hydraulic spring buffer which comprises a cylinder barrel assembly, a piston is connected in the cylinder barrel assembly in a sliding mode, a guide rod is inserted in the piston in a penetrating mode, a compression spring is connected to the guide rod located between the bottom of the piston and the bottom of the cylinder barrel assembly in a sleeved mode, and a limiting sleeve is arranged between the piston and the bottom of the cylinder barrel assembly. The inner end face of the piston abuts against the end face of the limiting sleeve, a cavity used for injecting hydraulic oil is reserved between the piston and the inner wall of the cylinder barrel, and due to the fact that the cylinder barrel assembly, the piston and the cavity are arranged in a matched mode, after the compression spring rebounds, the hydraulic oil is injected into the cavity, the damping effect is achieved, and the rebounding speed is reduced; and the cylinder barrel and the piston are prevented from being damaged due to the fact that the springback speed of the compression spring is too high, and the device is suitable for industrial production and has high practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of spring buffers, and particularly relates to a self-priming hydraulic spring buffer. Background Technology

[0002] A patent titled "A Spring Buffer" (application number CN202420271500.8, application date 2024-02-04) is disclosed in the existing Chinese patent database. This spring buffer, belonging to the field of buffers, includes a base with a housing on top. A spring body is housed within the housing. Fixing components are symmetrically arranged on both sides of the housing. Each fixing component includes a first fixing strip, two second fixing strips, and fixing bolts. The bottom of the first fixing strip is fixedly connected to the base, and the two second fixing strips are respectively located on both sides of the first fixing strip. When the spring body needs to be replaced, the fixing bolts are unscrewed, the housing is pulled upwards, and the base plate is removed from the limiting block. The base plate of the new spring body is then inserted into the limiting block. The second fixing strips on both sides of the housing are aligned with the first fixing strip, so that the first fixing strip is inserted between the two second fixing strips. After the housing is fully inserted, the fixing bolts are tightened back in. This allows for quick replacement of the spring body, facilitating replacement when the spring body ages, and making it more convenient to use.

[0003] Spring dampers are buffer devices used in mechanical and other fields, mainly to slow down speed and improve safety and comfort. In existing dampers, the excessively rapid rebound of the compressed spring after operation can easily damage the cylinder and piston. This paper aims to propose a self-priming hydraulic spring damper that, after the compressed spring rebounds, injects hydraulic oil into the cylinder to provide damping and slow down the rebound speed. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to prevent the spring from rebounding too quickly after the spring damper has been working, which would cause damage to the cylinder and piston. In order to improve its shortcomings, this utility model provides a self-priming hydraulic spring damper.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A self-priming hydraulic spring damper includes a cylinder assembly, a piston slidably connected inside the cylinder assembly, a guide rod inserted inside the piston, a compression spring sleeved on the guide rod located between the bottom of the piston and the bottom of the cylinder assembly, a limit sleeve provided between the piston and the bottom of the cylinder assembly, the inner end face of the piston abutting against the end face of the limit sleeve, and a cavity for injecting hydraulic oil left between the piston and the inner wall of the cylinder assembly.

[0007] Compared with the prior art, the beneficial effects of this utility model are: due to the coordinated arrangement of the cylinder assembly, piston and cavity, when the compression spring rebounds, hydraulic oil is injected into the cavity to play a damping role, slowing down the rebound speed and avoiding damage to the cylinder and piston caused by the excessive rebound speed of the compression spring. This device is suitable for industrial production and has strong practicality.

[0008] As a preferred embodiment, the cylinder assembly includes a cylinder body, a rear cover connected to the rear end of the cylinder body, the inner end face of the rear cover abutting against the end face of the limiting sleeve, a front cover connected to the front end of the cylinder body, and the piston being slidably inserted into the front cover.

[0009] As a preferred embodiment, the inner end face of the piston is provided with a concave portion, and one end of the compression spring abuts against the surface of the concave portion.

[0010] As a preferred embodiment, a pad is sleeved on the guide rod, the pad is disposed against the inner end face of the rear cover of the cylinder assembly, and an annular groove is formed on the inner end face of the pad, and one end of the compression spring is engaged in the annular groove.

[0011] As a preferred embodiment, both the rear cover and the front cover are provided with countersunk holes and are connected to both ends of the cylinder body via countersunk bolts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 1. Cylinder assembly, 101. Cylinder body, 102. Rear cover, 103. Front cover, 2. Piston, 201. Recess, 3. Guide rod, 4. Compression spring, 5. Limiting sleeve, 6. Cavity, 7. Pad, 8. Annular groove, 9. Countersunk hole. Detailed Implementation

[0014] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1The diagram shows a self-priming hydraulic spring damper, comprising a cylinder assembly 1, a piston 2 slidably connected within the cylinder assembly 1, a guide rod 3 inserted within the piston 2, a compression spring 4 sleeved on the guide rod 3 located between the bottom of the piston 2 and the bottom of the cylinder assembly 1, a limiting sleeve 5 positioned between the piston 2 and the bottom of the cylinder assembly 1, the inner end face of the piston 2 abutting against the end face of the limiting sleeve 5, and a cavity 6 for injecting hydraulic oil between the piston 2 and the inner wall of the cylinder assembly 1. The cylinder assembly 1 includes a cylinder body 101, a rear cover 102 connected to the rear end of the cylinder body 101, the inner end face of the rear cover 102 abutting against the end face of the limiting sleeve 5, and a front cover 103 connected to the front end of the cylinder body 101, with the piston 2 slidably inserted into the front cover 103. A recess 201 is provided on the inner end face of the piston 2, and one end of the compression spring 4 abuts against the surface of the recess 201. A pad 7 is fitted onto the guide rod 3. The pad 7 is positioned against the inner end face of the rear cover 102 of the cylinder assembly 1. An annular groove 8 is formed on the inner end face of the pad 7, and one end of the compression spring 4 is engaged in the annular groove 8. Countersunk holes 9 are formed on both the rear cover 102 and the front cover 103, and are connected to both ends of the cylinder body 101 by countersunk bolts.

[0016] In operation, external force pushes piston 2 toward the inside of cylinder body 101, causing compression spring 4 to be in a deformed state. During this process, some energy is absorbed. At the same time, piston 2 moves in hydraulic oil, generating a damping effect, which further consumes impact energy and can effectively slow down and absorb impact. When the buffering action is completed, compression spring 4 returns to its original position, pushing piston 2 to return to its original position. At the same time, negative pressure is generated in cylinder body 101 due to the movement of piston 2, forming a suction force, which causes hydraulic oil to be automatically drawn into the space vacated by piston 2 due to its movement, preparing for the next buffering action. To prevent piston 2 from rebounding too quickly, hydraulic oil can be injected into cavity 6 to form a damping effect, partially buffering the rebound of piston 2 and avoiding damage to cylinder body 101 and piston 2 caused by excessive rebound speed of compression spring 4.

[0017] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A self-priming hydraulic spring damper, characterized in that: It includes a cylinder assembly (1), a piston (2) is slidably connected inside the cylinder assembly (1), a guide rod (3) is inserted inside the piston (2), a compression spring (4) is sleeved on the guide rod (3) located between the bottom of the piston (2) and the bottom of the cylinder assembly (1), a limit sleeve (5) is provided between the bottom of the piston (2) and the bottom of the cylinder assembly (1), the inner end face of the piston (2) abuts against the end face of the limit sleeve (5), and a cavity (6) for injecting hydraulic oil is left between the piston (2) and the inner wall of the cylinder assembly (1).

2. The self-priming hydraulic spring buffer according to claim 1, characterized in that: The cylinder assembly (1) includes a cylinder body (101), a rear cover (102) is connected to the rear end of the cylinder body (101), the inner end face of the rear cover (102) abuts against the end face of the limiting sleeve (5), a front cover (103) is connected to the front end of the cylinder body (101), and the piston (2) is slidably inserted into the front cover (103).

3. A self-priming hydraulic spring buffer according to claim 2, characterized in that: The piston (2) has a recessed portion (201) on its inner end face, and one end of the compression spring (4) abuts against the surface of the recessed portion (201).

4. A self-priming hydraulic spring buffer according to claim 3, characterized in that: A pad (7) is sleeved on the guide rod (3). The pad (7) is set against the inner end face of the rear cover (102) of the cylinder assembly (1). An annular groove (8) is opened on the inner end face of the pad (7). One end of the compression spring (4) is engaged in the annular groove (8).

5. A self-priming hydraulic spring damper according to any one of claims 2-4, characterized in that: Both the rear cover (102) and the front cover (103) are provided with countersunk holes (9), and are connected to both ends of the cylinder body (101) by countersunk bolts.

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