CN209780561U - a damper - Google Patents

Abstract

The utility model provides a damper with small size, long service life and quietness, which includes a cylinder body and a piston rod movable and telescopic in the cylinder body. One end of the cylinder body is closed and the other end is penetrated by the piston rod. One end of the piston rod penetrating into the cylinder body is provided with a moving piston, a moving spring is arranged between the moving piston and the closed end of the cylinder body, and a moving spring is arranged between the moving piston and the other end of the cylinder body. A protection device is provided, and damping oil is filled between the protection device and the closed end of the cylinder body, and a through hole is provided on the moving piston, and the through hole is tapered and close to the diameter of one end of the moving spring Smaller, the protection device includes a protection piston and a protection spring pressed between the protection piston and the other end of the cylinder.

Description

a damper

【Technical field】

The utility model relates to a damper.

【Background technique】

At present, in order to avoid the noise caused by the collision when the doors and windows are closed, or even damage the doors and windows due to the collision, damping buffers are often added during installation to avoid the above situation, and the damping buffers are also very popular among consumers. .

However, the existing damping buffers all rely on external extension springs to play a buffering role, which has the following disadvantages: 1. The extension springs are prone to excessive fatigue, thereby reducing the life of the extension springs and reducing the buffering effect; 2. The tension spring installed is easy to rust, which will also lead to a decrease in its life and reduce the buffering effect; 3. The external tension spring produces a lot of noise.

【Content of utility model】

The technical problem to be solved by the utility model is to provide a damper with small volume, long service life and quiet sound.

The purpose of this utility model is achieved in that:

A damper, comprising a cylinder and a piston rod movable and telescopic in the cylinder, one end of the cylinder is closed and the other end is penetrated by the piston rod, and the piston rod penetrates one end of the cylinder A moving piston is provided, a moving spring is provided between the moving piston and the closed end of the cylinder body, a protection device is provided between the moving piston and the other end of the cylinder body, and the protection device is connected to the closed end of the cylinder body. Damping oil is filled between the closed ends of the cylinder, and a through hole is provided on the moving piston. The through hole is tapered and has a smaller diameter near the end of the moving spring. The protection device includes a protection piston and a top A protection spring pressed between the protection piston and the other end of the cylinder.

The utility model adopts the above-mentioned structure, and a moving spring is set in the cylinder instead of an external extension spring, so that the overall structure is small and exquisite, thereby reducing the manufacturing cost, and the moving spring is set in the cylinder, which reduces the contact with the air. contact to prevent rust and improve its service life. At the same time, the noise generated by the moving spring due to expansion and contraction will also be effectively silenced by the cylinder body, so the utility model is relatively quiet when used; when the first moving spring and the second moving spring When the damping oil in the space flows into the space formed between the moving piston and the protection device, the space formed between the moving piston and the protection device will be continuously compressed, so that the pressure on the cylinder body in this space is the largest, while the movement There is a protective device between the piston and the other end of the cylinder, so that the damping oil is gradually compressed and its hydraulic pressure rapidly increases to a certain maximum value during the compression process (at this time, the space formed between the moving piston and the protective device If the hydraulic pressure is greater than the compression deformation elastic force of the protective spring), the protective piston on the protective device starts to move and compress the protective spring so that the space formed between the movable piston and the protective device increases, thereby reducing the pressure on the cylinder body in this space pressure to prevent cylinder explosion and further improve the service life of the utility model.

In the above-mentioned damper, the moving spring includes a first moving spring and a second moving spring, one end of the first moving spring presses against the moving piston, and one end of the second moving spring presses against the moving piston. The closed end of the cylinder body, a spring cover is provided between the first moving spring and the second moving spring, and an oil hole is provided on the spring cover, and the moving spring is divided into a first moving spring and a second moving spring , so that the elastic force and cushioning capacity are greatly improved, and at the same time, the oil hole can make the damping oil cover the first moving spring and the second moving spring at the same time to avoid the moving spring from rusting and further improve its service life.

According to the above-mentioned damper, one end of the cylinder body is detachably connected with an end cover through which the piston rod passes, so that components such as the protection device, the piston rod and the moving spring can be disassembled and replaced.

According to the above-mentioned damper, the outer end of the piston rod is provided with a rod head for connecting the actuators of doors and windows.

【Description of drawings】

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail, wherein:

Fig. 1 is the sectional structural representation of the utility model;

Fig. 2 is a schematic diagram of the decomposition structure of the utility model;

Fig. 3 is a schematic cross-sectional structure diagram of the moving piston of the present invention.

【Detailed ways】

A damper comprises a cylinder body 1 and a piston rod 2 movable and telescopic in the cylinder body 1. One end of the cylinder body 1 is closed and the other end is penetrated by the piston rod 2. The end of the piston rod 2 penetrating into the cylinder body 1 is provided with a movable The piston 3 and the outer end of the piston rod 2 are provided with a rod head 21, a movable spring 4 is provided between the movable piston 3 and the closed end of the cylinder body 1, and a protection device 5 is provided between the movable piston 3 and the other end of the cylinder body 1 Damping oil is filled between the protection device 5 and the closed end of the cylinder body 1, and a through hole 31 is provided on the moving piston 3. The through hole 31 is tapered and has a smaller diameter near the end of the moving spring 4. The protection device 5 includes protection The piston 51 and the protection spring 52 pressed between the protection piston 51 and the other end of the cylinder body 1 .

The moving spring 4 comprises a first moving spring 41 and a second moving spring 42. One end of the first moving spring 41 presses the piston 3, and one end of the second moving spring 42 presses the closed end of the cylinder body 1. The first moving spring 41 A spring cover 43 is provided between the second moving spring 42 and an oil hole 431 is provided on the spring cover 43 .

For the convenience of assembly and disassembly, one end of the cylinder body 1 is screwed with an end cover 11 through which the piston rod 2 passes.

When the utility model was in use, pushing the rod head 21 made the piston rod 2 top push the piston 3 to move in the direction of the moving spring 4, and the piston 3 constantly compressed the space of the first moving spring 41 and the second moving spring 42 (for ease of expression) , hereinafter referred to as the first space), so that the damping oil on it is squeezed into the other side of the moving piston 3 through the through hole 31 of the moving piston 3 (the space formed between the moving piston 3 and the protection device 5, for the convenience of expression, Hereinafter referred to as the second space), since the diameter of the through hole 31 near the end of the moving spring 4 is small, the damping oil is quickly squeezed into the second space, so that the hydraulic pressure in the second space increases rapidly, making its hydraulic pressure The difference between the hydraulic pressure in the first space and the compression elastic force produced by the first moving spring 41 and the second moving spring 42 is basically equal, so the piston rod 3 can be easily pushed into the cylinder body 1 at this time, and the above process is the basis The utility model is used as an action when opening a door or opening a window. When the piston rod 3 is pulled hard, under the action of the pulling force and the compression force of the first moving spring 41 and the second moving spring 42, the moving piston 3 moves toward the second space, thereby compressing the second space, so that the The damping oil is discharged into the first space 1 through the through hole 31. Since the diameter of the through hole 31 near the end of the moving spring 4 is small, the speed at which the damping oil is discharged into the first space 1 is relatively slow, so that the damping in the second space The oil is gradually compressed and its hydraulic pressure increases rapidly during the compression process. When it increases to a certain maximum value (the hydraulic pressure in the second space is greater than the compression deformation elastic force of the protection spring 52), the protection device 5 will The piston 51 starts to move and compresses the protection spring 52. At this time, the piston rod 3 can only move outward slowly. At this time, the protection spring 52 generates a compression force to generate a thrust to the protection piston 51 and the damping oil in the second space, thereby making the second space The damping oil is slowly discharged into the first space 1 through the through hole 31, and finally the piston rod 3 is slowly pushed to the farthest end by the spring 4. At this time, the first moving spring 41, the second moving spring 42 and the protection spring 52 elastic resets, the hydraulic pressure in the first space and the second space also reaches balance, and the above process is the action of the utility model for closing the door or closing the window and buffering.

Claims (4)

1. The damper is characterized by comprising a cylinder body (1) and a piston rod (2) movably extending into the cylinder body (1), wherein one end of the cylinder body (1) is closed, the other end of the cylinder body (1) is used for allowing the piston rod (2) to penetrate, the piston rod (2) penetrates into one end of the cylinder body (1) and is provided with a movable piston (3), a movable spring (4) is arranged between the closed end of the cylinder body (1) and the movable piston (3), a protection device (5) is arranged between the other end of the cylinder body (1), damping oil is filled between the closed end of the cylinder body (1) and the movable piston (3), a through hole (31) is formed in the movable piston (3), the through hole (31) is conical and is close to the smaller caliber of one end of the movable spring (4), and the protection device (5) comprises a protection piston (51) and a top pressure arranged between the protection piston (51) and the protection spring (52) between the other end of the cylinder body (1) .

2. A damper according to claim 1, wherein the movable spring (4) comprises a first movable spring (41) and a second movable spring (42), one end of the first movable spring (41) presses the movable piston (3), one end of the second movable spring (42) presses the closed end of the cylinder (1), a spring sleeve (43) is arranged between the first movable spring (41) and the second movable spring (42), and an oil through hole (431) is arranged on the spring sleeve (43).

3. a damper according to claim 1 or 2, characterised in that an end cap (11) through which the piston rod (2) passes is detachably attached to one end of the cylinder (1).

4. A damper according to claim 3, characterised in that the outer end of the piston rod (2) is provided with a rod head (21).