Linkage type bidirectional buffering device

Abstract

The utility model discloses a linkage type two-way buffering device which comprises a damper, a guide connecting rod and a spring which are installed in a containing cavity, one end of the guide connecting rod is detachably installed at the extending end of the damper, the spring is arranged on the guide connecting rod in a sleeved mode, a blocking part is arranged at one end of the guide connecting rod, and the other end of the guide connecting rod is connected with the containing cavity. The two ends of the spring abut against the blocking part and the front end of the containing cavity respectively, a through hole is formed in the front end of the containing cavity, and one end of the guide connecting rod passes through the through hole and is located on the outer side of the containing cavity. The device has the bidirectional buffering capacity, all the components work in a linkage mode, the structural stability is good, the piston rod with damping can be slowly retracted through internal force, the structure is simple and compact, mounting and dismounting are convenient, and the adjustability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of damping buffering, in particular to a linkage type two-way buffering device. Background Technique

[0002] The hydraulic damper can provide a good buffering effect and is widely applied to some equipment or the door hinges that need buffering connection. By using the hydraulic damper, the relative movement between two connected objects can be buffered unidirectionally, preventing the impact generated when the two move relative to each other due to external force. In the actual use process, only using the damper with unidirectional buffering cannot meet the actual requirements. Usually, some elastic parts are used in cooperation to assist the damping recovery of the damper, and the used elastic parts will increase the structural complexity and increase the size of the connecting parts with buffering effect. At present, in the hinge field, it is more common to use the combination of a torsion spring and a damper. This way makes the hinge relatively large in volume and poor in aesthetics. There are also some structures that use the damper and the spring sleeved together, which simplifies part of the structure, but the diameter of the used spring still needs to be greater than or equal to the outer diameter of the damper. For example, a damping hinge disclosed in the invention patent with the application number CN201811542768.6, the used damper and spring of which are in a series structure, and its spring has no intermediate support and guiding structure, and needs external structure to restrain it during use, and the installation is also time-consuming. Content of the Utility Model

[0003] The purpose of the utility model is to provide a linkage type two-way buffering device, which has the two-way buffering ability, and each component operates in a linkage manner, with good structural stability, and can make the piston rod with damping slowly retract through internal force, and has a simple and compact structure, is convenient for installation and disassembly, and has strong adjustability.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A linkage type two-way buffering device includes a damper, a guiding connecting rod and a spring installed in a receiving cavity. One end of the guiding connecting rod is detachably installed on the extending end of the damper. The spring is sleeved on the guiding connecting rod. A blocking part is arranged at one end of the guiding connecting rod. Two ends of the spring respectively abut against the blocking part and the front end of the receiving cavity. A through hole is arranged on the front end of the receiving cavity. One end of the guiding connecting rod passes through the through hole and is located outside the receiving cavity.

[0006] Preferably, the axis of the guiding connecting rod coincides with the axis of the extending end of the damper.

[0007] Preferably, a connecting part is arranged at one end of the guiding connecting rod located outside the receiving cavity.

[0008] Preferably, the damper includes a cylinder block, a piston assembly movably arranged on the cylinder block, and an end cover sealingly installed at the end of the cylinder block. The piston assembly includes a piston and a piston rod. The piston is slidably installed in the inner cavity of the cylinder block. One end of the piston rod is fixedly connected to the piston, and the other end of the piston rod passes through the end cover and is located outside the cylinder block. An oil return hole is provided on the piston. When the piston rod retracts inward, the hydraulic damper is in a damping state.

[0009] Preferably, the oil return hole includes a damping hole provided on the piston and a one-way valve installed on the piston. When the piston rod extends outward, the one-way valve is in an open state.

[0010] Preferably, one or more damping holes are provided, and one or more one-way valves are provided.

[0011] Preferably, one end of the guiding connecting rod is detachably connected to the damper by a thread.

[0012] In the present utility model, the provided damper and the guiding connecting rod are detachably connected by a thread. On the one hand, the damper, the guiding connecting rod, and the spring can be assembled in advance and then installed as a whole, improving the assembly efficiency. On the other hand, the damper and the guiding connecting rod are always in a linked state during the operation process, and the structure has good stability. When the guiding connecting rod is pulled to make the piston rod extend outward, at this time, the spring is gradually compressed, having a certain buffering effect. When the external force disappears, the piston rod in the damping state slowly contracts through the elastic restoring force of the spring, realizing a linked two-way buffering effect and avoiding the impact phenomenon. The spring is sleeved on the guiding connecting rod. On the one hand, it reduces the diameter of the spring, which is beneficial to reducing the overall structural size. On the other hand, the guiding connecting rod guides the spring, making the elastic force of the spring completely consistent with the telescopic direction of the damper, making the best use of the elastic force of the spring. Description of the Drawings

[0013] Figure 1 is a schematic cross-sectional view of the overall structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the application state of the structure of the present utility model;

[0015] In the figure: 1, accommodation cavity; 2, damper; 3, guiding connecting rod; 4, spring; 5, blocking part; 6, through hole; 7, connecting part; 8, damping hole; 9, one-way valve; 20, cylinder block; 21, piston assembly; 22, end cover; 210, piston; 211, piston rod. Detailed Embodiments

[0016] The following will further describe the present utility model with reference to the drawings:

[0017] As Figure 1 andFigure 2 A linked double - acting buffer device as shown, includes a damper 2, a guiding connecting rod 3 and a spring 4 installed in the accommodation cavity 1. One end of the guiding connecting rod 3 is detachably installed on the extending end of the damper 2. In one embodiment, an external thread connecting portion is provided on the extending end of the damper 2, and an internal thread connecting portion is provided at one end of the guiding connecting rod 3. The external thread connecting portion is thread - connected to the internal thread connecting portion to achieve the detachable connection between the damper 2 and the guiding connecting rod 3. Of course, the damper 2 and the guiding connecting rod 3 can also be detachably connected by a pin or a buckle. In this embodiment, the thread connection method can finely adjust the telescopic stroke of the damper 2 and can adapt to a certain amount of installation and manufacturing errors. In a preferred embodiment, the axis of the guiding connecting rod 3 coincides with the axis of the extending end of the damper 2.

[0018] The spring 4 is sleeved on the guiding connecting rod 3. An end - stopping portion 5 is integrally provided at one end of the guiding connecting rod 3. Specifically, the end - stopping portion 5 is a disc, and the outer diameter of the disc is the same as or slightly larger than the outer diameter of the spring 4. The two ends of the spring 4 respectively abut against the end - stopping portion 5 and the front end of the accommodation cavity 1. A through - hole 6 is provided on the front end of the accommodation cavity 1, and one end of the guiding connecting rod 3 passes through the through - hole 6 and is located outside the accommodation cavity 1. In one embodiment, a connecting portion 7 is provided at the end of the guiding connecting rod 3 located outside the accommodation cavity 1. In this embodiment, the connecting portion 7 is a connecting hole provided at the front end of the guiding connecting rod 3. The connecting portion 7 is used to connect with an external structure. Through the external structure, the guiding connecting rod 3 can be telescoped. When this structure is applied to the hinge for connecting a cabinet body and a cabinet door, the external structure is a swinging connecting member, and the relative angle control between the hinge main body and the hinge cup body is realized through the swinging connecting member, that is, the opening and closing of the cabinet door.

[0019] The damper 2 includes a cylinder body 20, a piston assembly 21 movably arranged on the cylinder body 20, and an end - cover 22 hermetically installed at the front - end of the cylinder body 20. The piston assembly 21 includes a piston 210 and a piston rod 211. The piston 210 is slidably installed in the inner cavity of the cylinder body 20. One end of the piston rod 211 is fixedly connected to the piston 210 by welding, and the other end of the piston rod 211 passes through the end - cover 22 and is located outside the cylinder body 20. In one embodiment, the cylinder body 20 is a columnar structure. A first sealing member is installed between the end - cover 22 and the cylinder body 20, and the end - cover 22 and the cylinder body 20 are fixedly connected by fasteners. A second sealing member is installed between the piston rod 211 and the end - cover 22. Specifically, both the first sealing member and the second sealing member are O - ring seals. In a preferred embodiment, an external thread connecting portion is provided at the end of the exposed end of the piston rod 211.

[0020] An oil return hole is provided on the piston 210. When the piston rod 211 retracts inwardly, the damper 2 is in a damping state. In one embodiment, the oil return hole includes a damping hole 8 provided on the piston 210 and a one-way valve 9 fixedly installed on the piston 210. When the piston rod 211 extends outwardly, the one-way valve 9 is in an open state, and at this time, rapid oil return occurs, and the piston rod 211 is in a non-damping rapid extension state; when the piston rod 211 retracts inwardly, the one-way valve 9 is in a closed state, and at this time, the oil return in the cavity is slower, and the piston rod 211 is in a damping slow retraction state. When the piston rod 211 retracts to the limit position, the spring 4 is still in a compressed state. In a specific embodiment, one or more damping holes 8 are provided, and one or more one-way valves 9 are provided. Specifically, one damping hole 8 is provided and two one-way valves 9 are provided.

[0021] The above embodiments are only several descriptions of the concept and implementation of the present invention, and do not limit it. Under the concept of the present invention, technical solutions without substantial transformation are still within the protection scope.

Claims

1. A linkage type two-way buffer device, characterized in that: It includes a damper, a guiding connecting rod and a spring installed in a receiving cavity. One end of the guiding connecting rod is detachably installed on the extending end of the damper. The spring is sleeved on the guiding connecting rod. A blocking portion is provided at one end of the guiding connecting rod. Two ends of the spring respectively abut against the blocking portion and the front end of the receiving cavity. A through hole is provided at the front end of the receiving cavity. One end of the guiding connecting rod passes through the through hole and is located outside the receiving cavity. One end of the guiding connecting rod is detachably connected to the damper by a thread.

2. The linkage type two-way buffer device according to claim 1, wherein: The axis of the guiding connecting rod coincides with the axis of the extending end of the damper.

3. The linkage type two-way buffer device according to claim 2, wherein: A connecting portion is provided at one end of the guiding connecting rod located outside the receiving cavity.

4. The linkage type two-way buffer device according to claim 1, wherein: The damper includes a cylinder block, a piston assembly movably arranged on the cylinder block, and an end cover hermetically installed at the end of the cylinder block. The piston assembly includes a piston and a piston rod. The piston is slidably installed in the inner cavity of the cylinder block. One end of the piston rod is fixedly connected to the piston. The other end of the piston rod passes through the end cover and is located outside the cylinder block. An oil return hole is provided on the piston. When the piston rod retracts inward, the hydraulic damper is in a damping state.

5. The linkage type two-way buffer device according to claim 4, characterized in that: The oil return hole includes a damping hole provided on the piston and a one-way valve installed on the piston. When the piston rod extends outward, the one-way valve is in an open state.

6. The linkage type two-way buffer device according to claim 5, characterized in that: One or more damping holes are provided, and one or more one-way valves are provided.

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