Single-control two-way stretching gas spring

Abstract

The utility model provides a single-control two-way stretching gas spring which comprises a cylinder barrel, a piston rod, a sleeve, a first gear, a second gear and a threaded shaft, and the sleeve is installed in an inner cavity of the cylinder barrel; the piston rod is mounted in the sleeve through the guide sleeve and is in transmission connection with the sleeve; a third gear is mounted at the end part of the piston rod and is rotationally connected with the sleeve in a threaded manner; the first gear is in transmission connection with the piston rod, the second gear is in transmission connection with the sleeve, the first gear is in transmission connection with the second gear, and the first gear is in threaded rotation connection with the threaded shaft, so that the threaded shaft achieves stretching or compression movement relative to the first gear. The stroke of the piston rod and the stroke of the threaded shaft are controlled to be kept in a stretching or compressing state by controlling the moving direction of the threaded shaft through the gear, the stroke state of one side can be controlled, the stroke state of the other side can be controlled only by controlling the stroke state of one side, the single-control two-way function is effectively achieved, and the production and use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of springs, in particular to a single-control bidirectional extension gas spring. Background Art

[0002] A gas spring is an industrial accessory that can perform functions such as support, buffering, braking, height adjustment, and angle adjustment. Generally, a gas spring only has a piston rod in one direction and can only act on a single-direction drive. In some special environments, if a two-way drive is required, two gas springs must be installed on both sides at the same time, which causes inconvenience in actual use.

[0003] Currently, in the scenario of scissor-type cross-closure, a conventional gas spring can only control one door, making it impossible for a single person to open two doors simultaneously. In the prior art, an electric control method is used to achieve opening or closing, which increases the production cost and usage cost. Content of the Utility Model

[0004] The purpose of the utility model is to propose a gas spring device that can solve the drawback of single-direction drive where a single person cannot open two doors simultaneously and can also save costs.

[0005] To achieve the above object, the utility model proposes a single-control bidirectional extension gas spring, which includes a cylinder barrel, a piston rod, a sleeve, a first gear, a second gear, and a threaded shaft:

[0006] The sleeve is installed in the inner cavity of the cylinder barrel;

[0007] The piston rod is installed in the sleeve through a guide sleeve and is in transmission connection with the sleeve;

[0008] A third gear is installed at the end of the piston rod, and the third gear is in threaded rotation connection with the sleeve; the second gear is in transmission connection with the sleeve, the first gear is in transmission connection with the second gear, and the first gear is in threaded rotation connection with the threaded shaft, so that the threaded shaft moves in an extended manner relative to the first gear.

[0009] The threaded shaft is connected to the first gear through a guide fixing seat.

[0010] Further, the guide fixing seat is connected to the first gear through a bracket, and corresponding fixing holes are provided on the bracket and the guide fixing seat, so that the bracket and the guide fixing seat are bolt-fixed.

[0011] Further, sealing devices are installed at both ends of the sleeve, and the sealing devices are W-shaped sealing rings and plugs.

[0012] Furthermore, the movement of the threaded shaft relative to the first gear is stroke A, and the movement of the piston rod relative to the sleeve is stroke B. The stroke direction of stroke A is controlled by the first gear, such that the extended or compressed states of stroke A and stroke B are the same or opposite.

[0013] The mechanism for the present utility model to achieve single-control bidirectionality is as follows:

[0014] When the gas spring is filled with nitrogen pressure, the nitrogen pressure pushes the piston rod to extend to the right. At this time, the third gear is driven by the piston rod and moves to the right. Since the piston rod is a rotation-fixed part, the sleeve rotates in the cylinder barrel, and the plain bearings at both ends ensure the flexibility and stability of the rotation. When the sleeve rotates, it drives the first gear to rotate, and then drives the first gear to rotate, thereby causing the threaded shaft to move to the left until it is fully extended. During actual operation, when stroke A is in the compressed movement state, stroke B is transmitted by the gear and also realizes the compression stroke; when stroke A extends, stroke B also extends. Thus, by controlling the opening or closing of stroke A, the opening or closing of stroke B can be effectively controlled. Additionally, reverse state control can also be performed through the gear direction.

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] 1. In the present utility model, during the movement of the piston rod, the driving connection relationship of the three gears drives the threaded shaft to move, and the movement direction of the threaded shaft is controlled by the gears, thereby controlling the strokes of the piston rod and the threaded shaft to maintain the extended or compressed state. Therefore, as long as the stroke state of one party is controlled, the stroke state of the other party can be controlled, effectively realizing the function of single-control bidirectionality.

[0017] 2. The present utility model can also control the strokes of the piston rod and the threaded shaft by adjusting the gear direction, such that they form opposite states of extension and compression, that is, when the stroke of one party is in the telescopic state, the other party is controlled to be in the extended state. The operation is simple and convenient, the electronic control components are removed, and the production cost and usage cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic plan view of the single-control bidirectional extension gas spring in the compressed state according to an embodiment of the present utility model;

[0019] Figure 2 is a schematic plan view of the single-control bidirectional extension gas spring in the extended state according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be further described below.

[0021] This embodiment provides a single-control bi-directional extension gas spring. As Figure 1 shown, the spring structure includes a cylinder barrel 18, a piston rod 14, a sleeve 11, a first gear 1, a second gear 12, and a threaded shaft 5. Among them, the sleeve 11 is a threaded sleeve, which is installed in the inner cavity of the cylinder barrel 18; the piston rod 14 is installed in the sleeve 11 through a guide sleeve 17 and is in transmission connection with the sleeve 11;

[0022] At the left end of the piston rod 14, a third gear 13 is installed through a second key 12. The third gear 13 is connected to the threaded sleeve 11, and the connection method is a threaded rotation connection. When the piston rod 14 extends or compresses and moves in the threaded sleeve 11, due to its rotation characteristics, it is transmitted to the threaded sleeve 11, causing the threaded sleeve 11 to also rotate in the cylinder barrel 18; in addition, a connecting rod 19 is welded to the left end of the cylinder barrel 18. The connecting rod 19 is connected to the second gear 7 through a first key 6, so that the second gear 7 is in transmission connection with the threaded sleeve 11. At the same time, the first gear 1 is also connected to the second gear 7 through meshing, so as to realize that the first gear 1 is also in transmission connection with the second gear 7. Therefore, when the threaded sleeve 11 rotates, it will drive the second gear 7 to rotate, and then further transmit to the first gear 1, causing the first gear 1 to rotate; the first gear 1 is in threaded rotation connection with the threaded shaft 5, so that the threaded shaft 5 moves relative to the first gear 1 to achieve extension or compression.

[0023] In this embodiment, the first gear 1 is also connected to a guide fixing seat 2. The threaded shaft 5 is connected to the first gear 1 through the guide fixing seat 2. As Figure 1 shown, a bracket 3 is installed on the guide fixing seat 2 and is fixedly connected to the first gear 1 through the bracket 3. Among them, corresponding fixing holes are provided on both the bracket 3 and the guide fixing seat 2, so that the bracket 3 and the guide fixing seat 2 are fixed by bolts 4.

[0024] In this embodiment, plane bearings and sealing devices are respectively installed at both ends of the threaded sleeve 11, so that the first plane bearing 10 and the second plane bearing 15 are symmetric left and right; the sealing device is as Figure 1 shown. The sealing device is a W-shaped sealing ring and a plug 8. Among them, the W-shaped sealing ring includes a first W-shaped sealing ring 9 and a second W-shaped sealing ring 15 that are symmetric left and right.

[0025] In this embodiment, the movement of the threaded shaft 5 relative to the first gear 1 is stroke B, and the movement of the piston rod 14 relative to the threaded sleeve 11 is stroke A. As Figure 2As shown, when nitrogen pressure is injected into the air spring through the inner hole clearance formed by the guide sleeve 17, the nitrogen pressure pushes the piston rod 14 to extend to the right. The third gear 13 is driven by the piston rod 14 to move to the right. Since the piston rod 14 is a rotation-fixed part, the threaded sleeve 11 rotates in the cylinder barrel. The plain bearings at both ends of the threaded sleeve 11 help maintain the flexibility and stability of its rotation. When the threaded sleeve 11 rotates in the cylinder barrel, it drives the second gear 7 to rotate, and then drives the first gear 1 to rotate. Thus, under the threaded driving force, the threaded shaft 5 starts to move to the left until it is fully extended. At this time, as Figure 2 shown, both the stroke A and the stroke B are in the extended state.

[0026] During the actual operation process, when the stroke A performs a compression movement, the stroke B is transmitted by the gear and also performs a compression movement, as shown in the schematic diagram of the compression state in Figure 1 ; when the stroke A performs an extension movement, the stroke B also performs an extension movement accordingly. Thus, by controlling the opening or closing of the stroke A, the opening or closing of the stroke B can be successfully controlled. In the present invention, the movement of the stroke A and the stroke B in opposite states can also be controlled by the gear direction, that is, by the gear direction, when the stroke A performs a compression movement, the stroke B is transmitted by the gear and performs an extension movement; when the stroke A performs an extension movement, the stroke B performs a compression movement.

[0027] The above is only the preferred embodiment of the present utility model and does not impose any limitation on the present utility model. Any person skilled in the art within the technical field, without departing from the technical solution of the present utility model, makes any form of equivalent substitution or modification and other changes to the technical solution and technical content disclosed in the present utility model, all of which belong to the content that does not depart from the technical solution of the present utility model and still fall within the protection scope of the present utility model.

Claims

1. A single-control bidirectional expansion gas spring, characterized in that: It includes a cylinder, a piston rod, a sleeve, a first gear, a second gear and a threaded shaft: The sleeve is installed in the inner cavity of the cylinder; The piston rod is installed in the sleeve through a guide sleeve and is transmission-connected with the sleeve; A third gear is installed at the end of the piston rod, and the third gear is threadedly connected to the sleeve; The second gear is transmission-connected to the sleeve, the first gear is transmission-connected to the second gear, and the first gear is threadedly rotationally connected to the threaded shaft, so that the threaded shaft can achieve extension or compression movement relative to the first gear.

2. The single-control bidirectional expansion gas spring according to claim 1, characterized in that: The threaded shaft is connected to the first gear through a guide fixing seat.

3. The single-control bidirectional expansion gas spring according to claim 2, characterized in that: The guide fixing seat is connected to the first gear via a bracket, and corresponding fixing holes are provided on the bracket and the guide fixing seat so that the bracket and the guide fixing seat are fixed with bolts.

4. The single-control bidirectional expansion gas spring according to claim 1, characterized in that: Sealing devices are installed at both ends of the sleeve, and the sealing devices are W-shaped sealing rings and plugs.

5. The single-control bidirectional expansion gas spring according to claim 1, characterized in that: The movement of the threaded shaft relative to the first gear is stroke A, and the movement of the piston rod relative to the sleeve is stroke B. The stroke direction of the stroke A is controlled by the first gear so that the extension or compression states of the stroke A and the stroke B remain the same or opposite.

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