A damper

Abstract

The present invention provides a damper with small size, long service life and low noise, comprising a cylinder body and a piston rod movably retractable in the cylinder body, one end of the cylinder body is closed and the other end is for the piston rod to penetrate, a movable piston is provided at the end of the piston rod penetrating the cylinder body, a movable spring is provided between the movable piston and the closed end of the cylinder body, a protective device is provided between the movable piston and the other end of the cylinder body, damping oil is filled between the protective device and the closed end of the cylinder body, a through hole is provided on the movable piston, the through hole is conical and has a smaller diameter close to one end of the movable spring, and the protective device comprises a protective piston and a protective spring pressed between the protective piston and the other end of the cylinder body.

Description

[Technical field]

[0002] The invention relates to a damper. [Background technology]

[0004] At present, in order to avoid noise caused by collision when closing doors and windows, or even damage to doors and windows due to collision, damping buffers are often added during installation to avoid the above situation, and damping buffers are also very popular among consumers. However, existing damping buffers rely on external tension springs to play a buffering role, which has the following disadvantages: 1. The tension spring is prone to excessive fatigue, which reduces the life of the tension spring and reduces the buffering effect; 2. The external tension spring is prone to rust, which also reduces its life and reduces the buffering effect; 3. The external tension spring generates a lot of noise. [Summary of the invention]

[0006] The technical problem to be solved by the present invention is to provide a damper which is small in size, long in service life and silent.

[0007] The object of the present invention is achieved in that:

[0008] A damper comprises a cylinder body and a piston rod which is movable and retractable in the cylinder body, wherein one end of the cylinder body is closed and the other end is for the piston rod to penetrate, a movable piston is provided at the end of the piston rod which penetrates the cylinder body, a movable spring component is provided between the movable piston and the closed end of the cylinder body, a protective device is provided between the movable piston and the other end of the cylinder body, damping oil is filled between the protective device and the closed end of the cylinder body, a through hole is provided on the movable piston, the through hole is conical and has a smaller diameter near one end of the movable spring, and the protective device comprises a protective piston and a protective spring which is pressed between the protective piston and the other end of the cylinder body.

[0009] The present invention adopts the above structure, and a dynamic spring component is arranged in the cylinder body instead of an external tension spring, so that the overall structure is compact, thereby reducing the manufacturing cost, and the dynamic spring is arranged in the cylinder body, which reduces the contact with the air, prevents rust and thus increases its service life. At the same time, the noise generated by the dynamic spring due to expansion and contraction will also be effectively silenced by the cylinder body, so the present invention is relatively quiet when used; when the damping oil in the space where the first dynamic spring and the second dynamic spring are located flows into the space formed between the dynamic piston and the protective device, the space formed between the dynamic piston and the protective device is continuously compressed, so that the pressure on the cylinder body in this space is the maximum, and a protective device is arranged between the dynamic piston and the other end of the cylinder body, so that the damping oil is gradually compressed and its liquid pressure rapidly increases to a certain maximum value during the compression process (at this time, the liquid pressure in the space formed between the dynamic piston and the protective device is greater than the compression deformation elastic force of the protective spring), the protective piston on the protective device starts to move and compresses the protective spring to increase the space formed between the dynamic piston and the protective device, thereby reducing the pressure on the cylinder body in this space to prevent cylinder explosion, further increasing the service life of the present invention.

[0010] In a damper as described above, the dynamic spring component includes a first dynamic spring and a second dynamic spring, one end of the first dynamic spring presses against the dynamic piston, and one end of the second dynamic spring presses against the closed end of the cylinder body, a spring sleeve is provided between the first dynamic spring and the second dynamic spring, and an oil hole is provided on the spring sleeve. The dynamic spring component is divided into a first dynamic spring and a second dynamic spring, so that its elastic force and buffering capacity are greatly improved, and at the same time, the oil hole can make the damping oil cover the first dynamic spring and the second dynamic spring at the same time to prevent the dynamic spring from rusting, further improving its service life. In a damper as described above, one end of the cylinder body is detachably connected to an end cap for the piston rod to pass through so that the protective device, piston rod, dynamic spring and other components can be disassembled and replaced.

[0011] In the damper as described above, the outer end of the piston rod is provided with a rod head for connecting to an actuator of a door or window.

Brief Description of the Drawings

[0013] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0016] Figure 3 It is a schematic cross-sectional structural diagram of the movable piston of the present invention. [Specific implementation method]

[0018] A damper comprises a cylinder body 1 and a piston rod 2 which is movable and retractable in the cylinder body 1. One end of the cylinder body 1 is closed and the other end is for the piston rod 2 to penetrate. A movable piston 3 is provided at the end of the piston rod 2 which penetrates the cylinder body 1. A rod head 21 is provided at the outer end of the piston rod 2. A movable spring component 4 is provided between the movable piston 3 and the closed end of the cylinder body 1. A protective device 5 is provided between the movable piston 3 and the other end of the cylinder body 1. Damping oil is filled between the protective device 5 and the closed end of the cylinder body 1. A through hole 31 is provided on the movable piston 3. The through hole 31 is conical and has a smaller diameter near one end of the movable spring component 4. The protective device 5 comprises a protective piston 51 and a protective spring 52 which is pressed between the protective piston 51 and the other end of the cylinder body 1. The dynamic spring component 4 includes a first dynamic spring 41 and a second dynamic spring 42. One end of the first dynamic spring 41 presses the dynamic piston 3, and one end of the second dynamic spring 42 presses the closed end of the cylinder body 1. A spring sleeve 43 is provided between the first dynamic spring 41 and the second dynamic spring 42, and an oil hole 431 is provided on the spring sleeve 43.

[0019] To facilitate disassembly and assembly, an end cover 11 for the piston rod 2 to pass through is screwed on one end of the cylinder body 1 .

[0020] When the present invention is used, the push rod head 21 causes the piston rod 2 to push the piston 3 toward the direction of the moving spring component 4. During the movement, the piston 3 continuously compresses the space between the first moving spring 41 and the second moving spring 42, which is referred to as the first space for the sake of convenience. As a result, the damping oil thereon 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 protective device 5 is referred to as the second space for the sake of convenience. Since the through hole 31 has a smaller diameter near one end of the moving spring component 4, the damping oil is quickly squeezed into the second space, thereby rapidly increasing the liquid pressure in the second space, so that the difference between the liquid pressure and the liquid pressure in the first space is substantially equal to the compression elastic force generated by the first moving spring 41 and the second moving spring 42. Therefore, at this time, the piston rod 3 can be easily pushed into the cylinder body 1. The above process is the action of the present invention when used to open a door or a window. When the piston rod 2 is pulled hard, the movable piston 3 moves toward the second space under the action of the pulling force, the compression force of the first movable spring 41 and the compression force of the second movable spring 42, thereby compressing the second space, so that the damping oil in the second space 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 movable spring component 4 is small, the speed at which the damping oil is discharged into the first space 1 is slow, so that the damping oil in the second space is gradually compressed and its liquid pressure increases rapidly during the compression process. When it increases to a certain maximum value, the liquid pressure in the second space is greater than the compression deformation force of the protection spring 52, and the protection device 5, the protection piston 51 on the piston rod 3 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 elastic force to thrust the protection piston 51 and the damping oil in the second space, so that the damping oil in the second space is slowly discharged into the first space 1 through the through hole 31. Finally, the piston rod 3 is slowly pushed to the farthest end by the passive spring component 4. At this time, the first dynamic spring 41, the second dynamic spring 42 and the protection spring 52 are elastically reset, and the liquid pressure in the first space and the second space is also balanced. The above process is used for closing the door and buffering or closing the window and buffering.

Claims

1. A damper, characterized in that The invention comprises a cylinder body (1) and a piston rod (2) which is movable and retractable in the cylinder body (1); one end of the cylinder body (1) is closed and the other end is for the piston rod (2) to penetrate; the end of the piston rod (2) which penetrates the cylinder body (1) is provided with a movable piston (3); a movable spring component (4) is provided between the movable piston (3) and the closed end of the cylinder body (1); a protective device (5) is provided between the movable piston (3) and the other end of the cylinder body (1); damping oil is filled between the protective device (5) and the closed end of the cylinder body (1); a through hole (31) is provided on the movable piston (3); the through hole (31) is conical and has a smaller diameter at one end close to the movable spring component (4); the protective device (5) comprises a protective movable spring component (5); a protective movable spring component (5) is provided between the movable piston (3) and the other end of the cylinder body (1); a damping oil is filled between the protective device (5) and the closed end of the cylinder body (1); a through hole (31) is provided on the movable piston (3); the through hole (31) is conical and has a smaller diameter at one end close to the movable spring component (4); the protective device (5) comprises a protective movable spring component (5); a protective movable spring component (5) is provided between the movable piston (3) and the closed end of the cylinder body (1); a protective movable spring component (4) is provided between the movable piston (3) and the closed end of the cylinder body (1); a protective movable spring component (5 ... The piston (51) and the protective spring (52) are pressed between the protective piston (51) and the other end of the cylinder (1); the dynamic spring component (4) comprises a first dynamic spring (41) and a second dynamic spring (42), one end of the first dynamic spring (41) presses the dynamic piston (3), and one end of the second dynamic spring (42) presses the closed end of the cylinder (1); a spring sleeve (43) is provided between the first dynamic spring (41) and the second dynamic spring (42), and an oil through hole (431) is provided on the spring sleeve (43); one end of the cylinder (1) is detachably connected to an end cover (11) for the piston rod (2) to pass through; the space between the first dynamic spring (41) and the second dynamic spring (42) is a first space A second space is formed between the movable piston (3) and the protective device (5); when the piston rod (2) is pulled with force, the movable piston (3) moves toward the second space under the action of the pulling force, the compression force of the first movable spring (41) and the compression force of the second movable spring (42), thereby compressing the second space, so that the damping oil in the second space is discharged into the first space (1) through the through hole (31). Since the diameter of the through hole (31) at one end close to the movable spring component (4) is smaller, the speed at which the damping oil is discharged into the first space (1) is slow, so that the damping oil in the second space is gradually compressed and its liquid pressure increases rapidly during the compression process. When it increases to a certain maximum value, the liquid pressure in the second space is greater than the compression force of the protective spring (52). The protective piston (51) on the protective device (5) starts to move and compresses the protective spring (52). At this time, the piston rod (2) can only move outward slowly. At this time, the protective spring (52) generates a compression force to push the protective piston (51) and the damping oil in the second space, so that the damping oil in the second space is slowly discharged into the first space (1) through the through hole (31). Finally, the piston rod (2) is slowly pushed to the farthest end by the passive spring component (4). At this time, the first dynamic spring (41), the second dynamic spring (42) and the protective spring (52) are elastically reset, and the liquid pressure in the first space and the second space is also balanced. The above process is used for the action of closing the door and buffering or the action of closing the window and buffering.

2. A damper according to claim 1, characterized in that The outer end of the piston rod (2) is provided with a rod head (21).

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