Gas spring with supporting rod stabilizing structure

Abstract

The utility model relates to a gas spring with a supporting rod stabilizing structure. The gas spring comprises a gas spring cylinder barrel, a supporting rod, a piston, a cavity sealing ring, a limiting ring, an upper gasket and a lower gasket. According to the structure, an upper boss coaxial with the piston is arranged at the end, facing an opening of a gas spring cylinder barrel, of the piston, an upper gasket covers the upper boss, a limiting ring is arranged between the piston and the upper gasket and arranged on the upper boss in a sleeving mode, and the limiting ring abuts against the inner wall of the gas spring cylinder barrel; a coaxial lower boss is arranged at the end, facing the interior of the air spring cylinder barrel, of the piston, the lower gasket covers the lower boss, the cavity sealing ring is arranged between the piston and the lower gasket and arranged on the lower boss in a sleeving mode, and the cavity sealing ring abuts against the inner wall of the air spring cylinder barrel. By arranging the limiting ring, shaking of the piston in the air spring cylinder barrel is reduced, and the movement stability of the supporting rod is improved.

Description

Technical Field

[0001] The utility model relates to the fields of mechanical equipment and automobiles, and in particular to a gas spring applied to an opening and closing device of an automobile engine cover or a tailgate. Background Art

[0002] The existing gas spring lacks an effective and reliable support rod stabilizing structure, the gas spring piston lacks effective limiters, and the gap between the piston and the inner wall of the gas spring cylinder is large, causing the support rod to shake and tilt during movement, resulting in wear and leakage of the sealing ring and failure of the gas spring. The shaking of the support rod will also cause shaking or abnormal noise during the opening process of the cover. Summary of the invention

[0003] The purpose of the present utility model is to provide a gas spring with a support rod stabilizing structure in order to solve the above-mentioned problem. To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a gas spring with a support rod stabilizing structure, comprising: a gas spring cylinder with a hollow structure, a support rod, and a piston, an upper boss is arranged at one end of the piston facing the mouth of the gas spring cylinder, an upper gasket covers the upper boss, a limiting ring is arranged between the piston and the upper gasket and is sleeved on the upper boss, and the limiting ring abuts against the inner wall of the gas spring cylinder; a lower boss is arranged at one end of the piston facing the inside of the gas spring cylinder, a lower gasket covers the lower boss, a chamber sealing ring is arranged between the piston and the lower gasket and is sleeved on the lower boss, and the chamber sealing ring abuts against the inner wall of the gas spring cylinder.

[0004] Furthermore, the chamber of the gas spring cylinder is filled with pressurized gas.

[0005] Furthermore, at least one ventilation groove is longitudinally arranged on the cylindrical surface of the piston.

[0006] Furthermore, the end of the upper boss of the piston is gap-matched with the limiting ring.

[0007] Furthermore, the lower boss of the piston is gap-matched with the chamber sealing ring.

[0008] Furthermore, the upper gasket is provided with at least one vent.

[0009] Furthermore, a groove is arranged on the inner wall surface of the gas spring cylinder along the axial direction.

[0010] Furthermore, the cross section of the groove changes gradually from large to small from the bottom to the opening of the gas spring cylinder.

[0011] The working principle and beneficial effects of the utility model are as follows: after the gas spring cylinder chamber is filled with high-pressure gas, under the same air pressure, due to the different force areas of the upper and lower pistons, a pressure difference is generated, the piston drives the support rod to move upward, the chamber sealing ring moves downward, and contacts and seals with the lower gasket to form an upper chamber and a lower chamber. During the movement, the gas in the upper chamber passes through the vent of the upper gasket and the gap between the limit ring and the end of the upper boss, the vent groove of the piston cylindrical surface, and the groove on the inner wall of the gas spring cylinder to enter the lower chamber, and the limit ring limits the piston in the radial direction. When the support rod moves downward, the chamber sealing ring moves upward, and the gas in the lower chamber passes through the gap between the chamber sealing ring and the lower boss, the vent groove of the piston cylindrical surface, the gap between the limit ring and the end of the upper boss, and the vent of the upper gasket to enter the upper chamber.

[0012] As described above, the utility model reduces the shaking of the piston inside the gas spring cylinder and improves the movement stability of the support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the device of the utility model.

[0014] Figure 2 for Figure 1 An enlarged schematic diagram of the support rod of part A being extended.

[0015] Figure 3 for Figure 1 An enlarged schematic diagram of part A showing the support rod in a retracted state.

[0016] Figure 4 It is a schematic diagram of the inner wall groove of the gas spring cylinder of the utility model device.

[0017] Figure 5 It is the appearance diagram of the upper gasket of the device of the utility model.

[0018] Figure 6 It is the appearance diagram of the piston of the utility model device.

[0019] The reference numerals in the accompanying drawings of the specification are as follows:

[0020] Gas spring cylinder 1, groove 11, upper chamber 12, lower chamber 13, piston rod 2, piston 3, upper boss 31, lower boss 32, ventilation groove 33, upper gasket 4, ventilation port 41, limit ring 5, lower gasket 6, chamber sealing ring 7, pressure gas 8. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] In order to make the advantages of the technical means, embodiments, and technical solutions realized by the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and represented in the drawings can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0026] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "middle" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Changes or adjustments in their relative relationships, without substantial changes in the technical content, should also be regarded as the scope of the implementation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" 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 an indirect connection 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 invention can be understood according to specific circumstances.

[0028] like Figures 1 to 6 As shown, the utility model provides a gas spring with a support rod stabilizing structure, comprising: a gas spring cylinder 1 with a hollow structure, a support rod 2, and a piston 3, wherein an upper boss 31 is provided at one end of the piston 3 facing the mouth of the gas spring cylinder 1, an upper gasket 4 covers the upper boss 31, a limiting ring 5 is provided between the piston 3 and the upper gasket 4 and is sleeved on the upper boss 31, and the limiting ring 5 abuts against the inner wall of the gas spring cylinder 1; a lower boss 32 is provided at one end of the piston 3 facing the inside of the gas spring cylinder 1, a lower gasket 6 covers the lower boss 32, a chamber sealing ring 7 is provided between the piston 3 and the lower gasket 6 and is sleeved on the lower boss 32, and the chamber sealing ring 7 abuts against the inner wall of the gas spring cylinder 1.

[0029] like Figure 2 As shown, the chamber of the gas spring cylinder 1 is filled with pressurized gas 8 .

[0030] like Figure 6 As shown, a ventilation groove 33 is longitudinally arranged on the cylindrical surface of the piston 3.

[0031] like Figure 2 As shown, the end of the upper boss 31 of the piston 3 is in clearance fit with the limiting ring 5 , and the lower boss 32 of the piston 3 is in clearance fit with the chamber sealing ring 7 .

[0032] like Figure 5 As shown, the upper gasket 4 is provided with a vent 41 .

[0033] like Figure 4 As shown, a groove 11 is provided on the inner wall surface of the gas spring cylinder 1 along the axial direction, and the cross section of the groove 11 gradually changes from large to small from the bottom to the opening of the gas spring cylinder 1 .

[0034] like Figure 2As shown, after the chamber of the gas spring cylinder 1 is filled with high-pressure gas 8, under the same air pressure, due to the different force areas above and below the piston 3, a pressure difference is generated, and the piston 3 drives the support rod 2 to move upward, and the chamber sealing ring 7 moves downward, and contacts and seals with the lower gasket 6 to form an upper chamber 12 and a lower chamber 13. During the movement, the gas in the upper chamber 12 passes through the vent 41 of the upper gasket 4 and the gap between the limit ring 5 and the end of the upper boss 31, the vent groove 33 on the cylindrical surface of the piston 3, and the groove 11 on the inner wall of the gas spring cylinder 1. At the same time, the limit ring 5 limits the piston 3 in the radial direction. Figure 3 As shown, when the support rod 2 moves downward, the chamber sealing ring 7 moves upward, and the gas in the lower chamber 13 enters the upper chamber 12 through the gap between the chamber sealing ring 7 and the lower boss 32 of the piston 3, the ventilation groove 33 on the cylindrical surface of the piston 3, the gap between the limit ring 5 and the end of the upper boss 31, and the ventilation port 41 of the upper gasket 4.

[0035] As described above, the utility model reduces the shaking of the piston 3 inside the gas spring cylinder 1 and improves the movement stability of the support rod 2. At the same time, the limit ring 5 scrapes and cleans the impurities attached to the inner wall of the gas spring cylinder 1 during movement to prevent foreign matter from clogging the ventilation groove 11 on the inner wall of the gas spring cylinder 1 and causing the support rod 2 to stop moving or the buffer to fail.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A gas spring with a support rod stabilizing structure, comprising: The gas spring cylinder, support rod and piston are of a hollow structure, characterized in that: an upper boss is provided at one end of the piston facing the mouth of the gas spring cylinder, an upper gasket covers the upper boss, a limiting ring is provided between the piston and the upper gasket and is sleeved on the upper boss, and the limiting ring abuts against the inner wall of the gas spring cylinder; a lower boss is provided at one end of the piston facing the inside of the gas spring cylinder, a lower gasket covers the lower boss, a chamber sealing ring is provided between the piston and the lower gasket and is sleeved on the lower boss, and the chamber sealing ring abuts against the inner wall of the gas spring cylinder.

2. A gas spring with a support rod stabilizing structure according to claim 1, characterized in that: The chamber of the gas spring cylinder is filled with pressurized gas.

3. The gas spring with a support rod stabilizing structure according to claim 1, characterized in that: At least one ventilation groove is longitudinally arranged on the cylindrical surface of the piston.

4. The gas spring with a support rod stabilizing structure according to claim 1, characterized in that: The end of the upper boss of the piston is clearance-fitted with the limiting ring.

5. The gas spring with a support rod stabilizing structure according to claim 1, characterized in that: The lower boss of the piston is clearance-matched with the chamber sealing ring.

6. The gas spring with a support rod stabilizing structure according to claim 1, characterized in that: The upper gasket is provided with at least one vent.

7. The gas spring with a support rod stabilizing structure according to claim 1, characterized in that: The inner wall surface of the gas spring cylinder is provided with grooves along the axial direction.

8. The gas spring with a support rod stabilizing structure according to claim 7, characterized in that: The cross section of the groove gradually changes from large to small from the bottom of the gas spring cylinder to the opening.

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