Damper

Abstract

The utility model particularly relates to a damper which comprises a cylinder body, a piston rod and a limiting assembly for limiting the piston rod. An isolation gasket is arranged in the cylinder body to divide the cylinder body into a first cavity and a second cavity; the first cavity is filled with damping fluid. A piston assembly is arranged in the first cavity in a sliding mode. The piston assembly is provided with a circulation opening for the damping fluid to pass through. One end of the piston rod is fixedly connected with one end of the piston assembly, and the other end of the piston rod sequentially penetrates through the isolation gasket and the inner wall of the cylinder body and then is arranged on the outer side of the cylinder body. The other end of the piston assembly is slidably sleeved with a sealing assembly. The sealing assembly can abut against the piston assembly. The other end of the piston assembly is further provided with a protruding block used for delaying the deformation degree of the sealing assembly. The protruding block can abut against the sealing assembly. The limiting assembly is arranged on the piston rod in a sliding mode and located in the second cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, and more specifically, to a damper. Background Art

[0002] When the piston rod of a traditional damper moves to the damping point, the sealing component therein will directly and completely close the circulation pipeline, preventing the damping fluid from flowing. At this moment, a large damping force will be generated, making the movement of the piston rod not smooth and balanced. If such a damper is used on glass furniture such as glass doors, it may be damaged due to the momentary damping force, and the scene adaptability is low. For example, the invention patent with patent publication number CN110869573A discloses a damper with this problem. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a damper to solve the problems existing in the above-mentioned background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a damper, comprising: a cylinder body, a piston rod, and a limiting assembly for limiting the piston rod; an isolation gasket is arranged in the cylinder body to separate the cylinder body into a first chamber and a second chamber; the first chamber is filled with a damping fluid; a piston assembly is slidably arranged in the first chamber; the piston assembly is provided with a flow port for the damping fluid to pass through; one end of the piston rod is fixedly connected to one end of the piston assembly, and the other end passes through the isolation gasket and the inner wall of the cylinder body in sequence and is placed on the outside of the cylinder body; the other end of the piston assembly is slidably sleeved with a sealing assembly for isolating the piston assembly from the flow of damping fluid; the sealing assembly can abut against the piston assembly; the other end of the piston assembly is also provided with a convex block for delaying the deformation degree of the sealing assembly; the convex block can abut against the sealing assembly; the limiting assembly is slidably arranged on the piston rod and is located in the second chamber.

[0005] Optionally, the piston assembly includes: a piston head and a gasket; one end of the piston head is fixedly connected to the piston rod; the gasket is arranged on the other end of the piston head; a receiving groove is provided at one end of the piston head close to the gasket; the flow port is arranged on the piston head; the sealing assembly can be slidably mounted on the receiving groove; the protrusion is arranged on a side wall of the receiving groove close to the flow port; and the sealing assembly can respectively abut the protrusion and the inner wall of the receiving groove.

[0006] Optionally, the sealing assembly includes: a first sealing rubber ring for sealing the flow port; the first sealing rubber ring can be slidably mounted on the accommodating groove; the first sealing rubber ring can respectively abut against the protrusion and the inner wall of the accommodating groove; when the first sealing rubber ring is in abutment with the inner wall of the accommodating groove and the protrusion, the flow port is in a closed state.

[0007] Optionally, the limit assembly includes: a first spring fixing part, a second spring fixing part, a limit spring, and a sealing block; the first spring fixing part is fixedly connected to the piston rod; the second spring fixing part is slidably connected to the piston rod; one end of the limit spring is elastically connected to the first spring fixing part, and the other end is elastically connected to one end of the second spring fixing part; the sealing block is fixedly connected to the other end of the second spring fixing part.

[0008] Optionally, a receiving groove is provided in the cylinder body; and the isolation gasket is received in the receiving groove.

[0009] Optionally, the cylinder body is provided with a decompression groove; the decompression groove is located in the first chamber.

[0010] In summary, the utility model has the following beneficial effects:

[0011] 1. Compared with traditional dampers, the sealing component will not completely close the flow port when the piston rod moves to the damping point, but will first contact the bump, and then partially close the flow port to generate part of the damping force, and then contact the piston head to close the flow port to generate complete damping force; this method makes the damper generate damping force more slowly, and will not suddenly generate excessive damping force, resulting in unbalanced and unsmooth movement of the piston rod, causing damage to the glass components. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the specific structure of Part A of the utility model;

[0015] Figure 4 It is a schematic diagram of the specific structure of the piston assembly of the utility model.

[0016] In the figure: 1. cylinder body; 11. first chamber; 12. second chamber; 2. piston assembly; 21. piston head; 22. gasket; 23. flow port; 3. sealing assembly; 31. first sealing rubber ring; 4. piston rod; 5. limit assembly; 51. first spring fixing member; 52. second spring fixing member; 53. limit spring; 54. sealing block; 6. protrusion; 7. isolation gasket; 8. pressure relief groove. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Several embodiments of the utility model are given in the accompanying drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0018] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0019] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "vertical", "horizontal", "left", "right", "above", "below" and similar expressions are for illustrative purposes only, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] The utility model provides a damper, such as Figure 1 As shown, it includes: a cylinder body 1, a piston rod 4, and a limiting assembly 5 for limiting the piston rod 4; an isolation gasket 7 is arranged in the cylinder body 1 to separate the cylinder body 1 into a first chamber 11 and a second chamber 12; the first chamber 11 is filled with a damping fluid; a piston assembly 2 is slidably arranged in the first chamber 11; the piston assembly 2 is provided with a flow port 23 for the damping fluid to pass through; one end of the piston rod 4 is fixedly connected to one end of the piston assembly 2, and the other end passes through the isolation gasket 7 and the inner wall of the cylinder body 1 in sequence and is then placed on the outside of the cylinder body 1; the other end of the piston assembly 2 is slidably sleeved with a sealing assembly 3 for isolating the piston assembly 2 from the flow of the damping fluid; the sealing assembly 3 can abut against the piston assembly 2; the other end of the piston assembly 2 is also provided with a convex block 6 for delaying the deformation degree of the sealing assembly 3; the convex block 6 can abut against the sealing assembly 3; the limiting assembly 5 is slidably arranged on the piston rod 4 and is located in the second chamber 12.

[0022] Specifically, by setting the protrusion 6, when the piston rod 4 drives the piston assembly 2 to move to the damping point, the sealing assembly 3 will first contact and abut the protrusion 6 on the piston assembly 2, thereby slowing down the flow rate of the damping fluid from one side of the piston head 21 to the other side of the piston head 21, providing a part of the damping force to the piston assembly 2, and then abutting against the piston assembly 2, so that the flow port 23 is in a completely closed state, so that the damping fluid cannot flow from one side of the piston assembly 2 to the other side of the piston assembly 2, providing the maximum damping force to the piston assembly 2, and limiting the movement of the piston rod 4 by the continuously increasing damping force.

[0023] Furthermore, the piston assembly 2 includes: a piston head 21, and a gasket 22; one end of the piston head 21 is fixedly connected to the piston rod 4; the gasket 22 is arranged on the other end of the piston head 21; a receiving groove is opened at the end of the piston head 21 close to the gasket 22; the flow port 23 is arranged on the piston head 21; the sealing assembly 3 can be slidably mounted on the receiving groove; the protrusion 6 is arranged on the side wall of the receiving groove close to the flow port 23; the sealing assembly 3 can respectively abut the protrusion 6 and the inner wall of the receiving groove.

[0024] Specifically, Figure 2-4As shown, a flow port 23 is provided on the piston head 21. When the piston rod 4 drives the piston assembly 2 to move and the damping point is not reached, the flow port 23 is in a connected state. The damping fluid can flow from one side of the piston head 21 to the other side of the piston assembly 2 through the flow port 23, or flow from the other side of the piston head 21 to one side of the piston assembly 2. During the movement, the sealing assembly 3 can slide on the receiving groove and maintain a relatively static state with the piston head 21. The flow port 23 will not be closed, and the damping fluid can flow freely.

[0025] Specifically, the cushion block 22 can play a certain buffering role when it moves to the end of the cylinder body 1, thereby reducing the wear degree of the piston assembly 2 and the cylinder body 1, and further increasing the service life of the damper.

[0026] Furthermore, the sealing assembly 3 includes: a first sealing rubber ring 31 for sealing the flow port 23; the first sealing rubber ring 31 can be slidably mounted on the receiving groove; the first sealing rubber ring 31 can respectively abut against the protrusion 6 and the inner wall of the receiving groove; when the first sealing rubber ring 31 is in abutment with the inner wall of the receiving groove and the protrusion 6, the flow port 23 is in a closed state.

[0027] Specifically, Figure 2-3 As shown, the first sealing rubber ring 31 will not be deformed before reaching the damping point, and will maintain a relatively inhibited state with the piston head 21, and will not close the flow port 23; when the piston rod 4 drives the movable end to move to the damping point, the damping fluid on one side of the piston head 21 is squeezed to squeeze the first sealing rubber ring 31, so that the first sealing rubber ring 31 will move toward the piston head 21. During the movement, the first sealing rubber ring 31 will first abut against the bump 6 on the piston head 21, and partially deform, thereby partially closing the flow port 23 on the piston head 21. The piston head 21 is partially closed, generating partial damping force; then, when the piston rod 4 continues to move, the damping fluid on one side of the piston head 21 increases the force on the first sealing rubber ring 31, causing the first sealing rubber ring 31 to continue to deform, so that the first sealing rubber ring 31 abuts against the inner wall of the accommodating groove, thereby completely closing the flow port 23 on the piston head 21, and the damping fluid on one side of the piston head 21 is difficult to flow to the other side of the piston head 21. The damping fluid on one side of the piston head 21 will generate a damping force on the piston head 21, thereby slowing down the movement speed of the piston rod 4 until it stops.

[0028] Furthermore, the limiting assembly 5 includes: a first spring fixing member 51, a second spring fixing member 52, a limiting spring 53, and a sealing block 54; the first spring fixing member 51 is fixedly connected to the piston rod 4; the second spring fixing member 52 is slidably connected to the piston rod 4; one end of the limiting spring 53 is elastically connected to the first spring fixing member 51, and the other end is elastically connected to one end of the second spring fixing member 52; the sealing block 54 is fixedly connected to the other end of the second spring fixing member 52.

[0029] Specifically, Figure 2 As shown, the limit spring 53 can provide a certain reset force when the piston rod 4 resets and moves, making its reset smoother and ensuring that it does not exceed the maximum stroke during movement to cause damage to the equipment; the sealing block 54 can prevent the damping fluid from flowing out of the cylinder body 1, maintain the sealing inside the cylinder body 1, and prevent the leakage of the damping fluid.

[0030] Furthermore, a receiving groove is provided in the cylinder body 1; and the isolation gasket 7 is received in the receiving groove.

[0031] Specifically, Figure 2 As shown, the isolation gasket 7 divides the cylinder body 1 into a first chamber 11 and a second chamber 12 to prevent the damping fluid from leaking into the second chamber 12 during the flow of the first chamber 11 and causing damage to the overall structure of the damper.

[0032] Furthermore, the cylinder body 1 is provided with a decompression groove 8 ; the decompression groove 8 is located in the first chamber 11 .

[0033] Specifically, Figure 3 As shown, the pressure reducing groove 8 is provided at the end of the cylinder body 1, and is used for when the piston rod 4 drives the piston assembly 2 to move to the very end of the cylinder body 1 and stops, because it continuously squeezes the damping fluid on one side of the piston head 21, at this time, the pressure of the damping fluid on one side of the piston head 21 is relatively large, in order to prevent the damping fluid from pushing the piston head 21 due to excessive pressure, so that the piston rod 4 makes a reverse movement, the damping fluid on one side of the piston head 21 can flow from the edge of the piston head 21 to the other side of the piston head 21 through the pressure reducing groove 8, thereby achieving the effect of releasing pressure, and also ensuring that the piston rod 4 will not move in the reverse direction, causing the occurrence of safety problems.

[0034] In the specific implementation process, the piston rod 4 drives the piston assembly 2 to move. When the damping point is not reached, the first sealing rubber ring 31 can slide on the receiving groove without closing the flow port 23 on the piston head 21, so that the damping fluid can flow freely on one side of the piston head 21 and the other side of the piston head 21 without generating damping force.

[0035] When the piston rod 4 drives the piston assembly 2 to reach the damping point: the damping fluid on one side of the piston head 21 begins to exert an extrusion force on the first sealing rubber ring 31, causing it to continuously move toward the piston head 21. As the piston rod 4 continuously moves toward the side of the piston head 21, the extrusion force of the damping fluid on one side of the piston head 21 on the first sealing rubber ring 31 gradually increases, and the first sealing rubber ring 31 will first abut against the protrusion 6 on the piston head 21, and after the abutment is deformed, it will partially close the flow port 23, so that the damping fluid on one side of the piston head 21 flows into the piston The speed of the other side of the piston head 21 slows down, thereby generating a certain degree of damping force on the piston head 21, slowing down the moving speed of the piston rod 4; as the piston rod 4 continues to move, the squeezing force of the damping fluid on one side of the piston head 21 further increases, causing the first sealing rubber ring 31 to abut against the piston head 21, closing the flow port 23 on the piston head 21, making it difficult for the damping fluid on one side of the piston head 21 to flow to the other side of the piston head 21, generating a greater damping force on the piston head 21, thereby further slowing down the piston rod 4 until it stops;

[0036] When the flow port 23 is completely closed, the pressure of the damping fluid on one side of the piston head 21 still exists, and the first sealing rubber ring 31 still closes the flow port 23. A pressure reducing groove 8 is provided at the end of the cylinder body 1. When the piston assembly 2 moves to the pressure reducing groove 8, the damping fluid on one side of the piston head 21 flows out from the pressure reducing groove 8 to the other side of the piston head 21, thereby reducing the pressure of the damping fluid on one side of the piston head 21, and gradually reducing the damping force until the piston rod 4 stops; when the piston rod 4 stops, the damping force causes the piston rod 4 to move in the opposite direction, thereby causing damage to the damper.

[0037] Compared with the traditional damper, the sealing component 3 of the damper of the utility model will not completely close the flow port 23 when the piston rod 4 moves to the damping point, but will first contact the protrusion 6, and after contacting the protrusion 6, partially close the flow port 23 to generate a part of the damping force, and then contact the piston head 21 to close the flow port 23 to generate a complete damping force. This method makes the process of the damper generating the damping force smoother, and will not suddenly generate excessive damping force to damage the glass parts.

[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A damper, characterized in that: include: A cylinder body, a piston rod, and a limiting assembly for limiting the position of the piston rod; an isolation gasket is arranged in the cylinder body to separate the cylinder body into a first chamber and a second chamber; the first chamber is filled with a damping fluid; a piston assembly is slidably arranged in the first chamber; the piston assembly is provided with a flow port for the damping fluid to pass through; One end of the piston rod is fixedly connected to one end of the piston assembly, and the other end passes through the isolation gasket and the inner wall of the cylinder body in sequence and is placed on the outside of the cylinder body; the other end of the piston assembly is slidably sleeved with a sealing assembly used to isolate the piston assembly from the flow of the damping fluid; the sealing assembly can abut against the piston assembly; the other end of the piston assembly is also provided with a protrusion for delaying the deformation degree of the sealing assembly; the protrusion can abut against the sealing assembly; the limit assembly is slidably arranged on the piston rod and is located in the second chamber.

2. A damper according to claim 1, characterized in that: The piston assembly comprises: a piston head and a pad; One end of the piston head is fixedly connected to the piston rod; the cushion block is arranged on the other end of the piston head; a receiving groove is provided at one end of the piston head close to the cushion block; the flow port is arranged on the piston head; The sealing component can be slidably sleeved on the receiving groove; the protrusion is arranged on a side wall of the receiving groove close to the flow port; and the sealing component can abut against the protrusion and the inner wall of the receiving groove respectively.

3. A damper according to claim 2, characterized in that: The sealing assembly comprises: a first sealing rubber ring for sealing the flow port; The first sealing rubber ring can be slidably mounted on the receiving groove; the first sealing rubber ring can abut against the protrusion and the inner wall of the receiving groove respectively; when the first sealing rubber ring abuts against the inner wall of the receiving groove and the protrusion, the flow port is in a closed state.

4. A damper according to claim 1, characterized in that: The limiting assembly includes: a first spring fixing member, a second spring fixing member, a limiting spring, and a sealing block; The first spring fixing part is fixedly connected to the piston rod; the second spring fixing part is slidably connected to the piston rod; one end of the limit spring is elastically connected to the first spring fixing part, and the other end is elastically connected to one end of the second spring fixing part; the sealing block is fixedly connected to the other end of the second spring fixing part.

5. A damper according to claim 1, characterized in that: The cylinder body is provided with a decompression groove; the decompression groove is located in the first chamber.

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