Gas spring with good sealing performance

Abstract

The utility model discloses a gas spring with good sealing performance, and relates to the technical field of gas springs, according to the gas spring with good sealing performance, external impurities are blocked through a dustproof ring, the sealing performance of the gas spring is improved, connection between a sealing ring and a mounting groove is reinforced through a clamping ring, the sealing effect of the sealing ring is improved, and the probability of leakage of the gas spring is reduced. The air tightness of the air spring is optimized, the wear-resistant ring arranged in a matched mode can effectively prevent leakage of mechanical seal, the sealing performance of the air spring is improved, dust on the surface of the piston rod is blocked and cleaned through the cleaning ring, and the elastic piece is matched to continuously extend and extrude the cleaning ring, so that the cleaning ring is better attached to the piston rod; the cleaning performance of the cleaning ring is enhanced conveniently, the dustproof function of the gas spring is achieved, dust is prevented from being attached to the sliding connection position of the piston rod and the gas spring, abrasion to the connection position is avoided, and the service life of the gas spring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to a gas spring with good sealing performance. Background Art

[0002] Gas spring is an industrial accessory that can perform functions such as support, cushioning, braking, height adjustment and angle adjustment. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler, cylinder control element and cylinder control element and joint, etc. The principle is to fill the closed pressure cylinder with inert gas or oil-gas mixture to make the pressure in the cavity several times or dozens of times higher than the atmospheric pressure, and use the pressure difference caused by the cross-sectional area of ​​the piston rod being smaller than the cross-sectional area of ​​the piston to realize the movement of the piston rod.

[0003] For example, publication number CN105673758B, the present invention relates to the field of gas spring technology, and in particular to a gas-filling gas spring, comprising a cylinder and a piston assembly, the piston assembly comprising a piston and a piston rod, the piston being fixed at one end of the piston rod, one end of the piston rod extending into the cylinder and the piston being located inside the cylinder, the cylinder being a double-layer structure, comprising an inner layer and an outer layer, the piston being located in the inner layer, an air-filling chamber being formed between the inner layer and the outer layer, an air inlet being provided on the outer layer, an air inlet seal being installed on the air inlet, an air-filling port being also provided on the inner layer, the air-filling port being connected to the air-filling chamber and the rodless chamber of the cylinder, the gas-filling gas spring also comprising an air-filling port seal. The gas-filling gas spring of the present invention increases the gas-filling chamber by designing the cylinder into a double-layer structure, can replenish gas in time when a small amount of gas in the rodless chamber leaks, enhances the pressure of the gas spring, ensures the normal use of the gas spring, and thus increases the service life of the gas spring.

[0004] After working for a long time, the existing gas spring is prone to bring external dust particles into the gas spring through the piston rod, and adhere to the sliding connection between the piston rod and the gas spring, causing wear to the connection, thereby affecting the air tightness and service life of the gas spring. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a gas spring with good sealing performance to solve the problem raised in the above background technology that after working for a long time, the existing gas springs are prone to bring foreign dust particles into the interior of the gas spring through the piston rod, and adhere to the sliding connection between the piston rod and the gas spring, causing wear on the connection, thereby affecting the air tightness and service life of the gas spring.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a gas spring with good sealing performance, including a pressure cylinder, a sealing guide sleeve is provided at the upper end of the pressure cylinder, a dust ring is provided on the inner side of the sealing guide sleeve, a wear-resistant ring is provided on the inner side of the sealing guide sleeve located below the dust ring, an installation groove is provided on the inner side of the sealing guide sleeve located below the wear-resistant ring, a clamping ring is fixedly installed inside the installation groove, a sealing ring is clamped and connected to the clamping ring, a connecting piece is fixedly installed on the upper end of the sealing guide sleeve, an elastic piece is fixedly installed on the inner side of the connecting piece, a cleaning ring is fixedly connected to the end of the elastic piece away from the connecting piece, a piston rod is slidably connected to the inner side of the sealing guide sleeve, and the lower end of the piston rod extends to the inside of the pressure cylinder where a piston component is fixedly installed.

[0007] Preferably, the cross-section of the snap ring is designed to be a trapezoidal structure, and the sealing ring and the mounting groove are adapted to each other.

[0008] Preferably, the connecting member is designed in an annular structure, and the elastic members are distributed in an annular array.

[0009] Preferably, an air cavity 1 is provided inside the elastic member, and the cleaning ring is slidably connected to the piston rod.

[0010] Preferably, a rubber anti-collision ring is fixedly mounted on the upper end of the piston component at the side of the piston rod, and a second air cavity is arranged inside the rubber anti-collision ring.

[0011] Preferably, the piston component is slidably connected to the pressure cylinder, and an inflation valve is provided on the lower side of the pressure cylinder surface.

[0012] Beneficial Effects

[0013] The utility model provides a gas spring with good sealing performance. Compared with the prior art, it has the following beneficial effects:

[0014] The gas spring with good sealing performance uses a dustproof ring to block external impurities and improve the sealing performance of the gas spring, uses a snap ring to strengthen the connection between the sealing ring and the mounting groove, improves the sealing effect of the sealing ring, reduces the probability of leakage of the gas spring, optimizes the air tightness of the gas spring, and can effectively prevent leakage of the mechanical seal by cooperating with a wear-resistant ring, which is beneficial to improving the sealing performance of the gas spring. The cleaning ring is used to block and clean dust on the surface of the piston rod, and the elastic part continuously extends and squeezes the cleaning ring, so that the cleaning ring fits the piston rod more closely, which is convenient for enhancing the cleaning performance of the cleaning ring, realizes the dustproof function of the gas spring, avoids dust adhering to the sliding connection between the piston rod and the gas spring, and causes wear to the connection, which is beneficial to extending the service life of the gas spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the clamping ring structure of the utility model.

[0018] In the figure: 1-pressure cylinder; 2-sealing guide sleeve; 3-dustproof ring; 4-wear-resistant ring; 5-installation groove; 6-clamping ring; 7-sealing ring; 8-connecting piece; 9-elastic piece; 10-cleaning ring; 11-piston rod; 12-piston component; 13-air cavity one; 14-rubber anti-collision ring; 15-air cavity two; 16-inflating valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] A gas spring with good sealing performance, please refer to Figure 1-3 , including a pressure cylinder 1, a sealing guide sleeve 2 is provided at the upper end of the pressure cylinder 1, a dust ring 3 is provided on the inner side of the sealing guide sleeve 2, a wear-resistant ring 4 is provided on the inner side of the sealing guide sleeve 2 located below the dust ring 3, a mounting groove 5 is provided on the inner side of the sealing guide sleeve 2 located below the wear-resistant ring 4, a clamping ring 6 is fixedly installed inside the mounting groove 5, a sealing ring 7 is clamped and connected to the clamping ring 6, the cross-section of the clamping ring 6 is designed in a trapezoidal structure, the sealing ring 7 and the mounting groove 5 are adapted to each other, the dust ring 3 is used to block external impurities and improve the sealing performance of the gas spring, the clamping ring 6 is used to strengthen the connection between the sealing ring 7 and the mounting groove 5, the sealing effect of the sealing ring 7 is improved, the probability of leakage of the gas spring is reduced, the air tightness of the gas spring is optimized, and the wear-resistant ring 4 provided in combination can effectively prevent the leakage of the mechanical seal, which is beneficial to improving the sealing performance of the gas spring;

[0021] A connecting piece 8 is fixedly installed on the upper end of the sealing guide sleeve 2, and an elastic piece 9 is fixedly installed on the inner side of the connecting piece 8. A cleaning ring 10 is fixedly connected to the end of the elastic piece 9 away from the connecting piece 8. A piston rod 11 is slidably connected to the inner side of the sealing guide sleeve 2. The connecting piece 8 is designed in an annular structure, and the elastic piece 9 is distributed in an annular array. An air cavity 13 is arranged inside the elastic piece 9. The cleaning ring 10 is slidably connected to the piston rod 11. The cleaning ring 10 blocks and cleans the dust on the surface of the piston rod 11. The cleaning ring 10 is continuously extended and squeezed by the elastic piece 9, so that the cleaning ring 10 is more closely attached to the piston rod 11, which is convenient for enhancing the cleaning performance of the cleaning ring 10, realizing the dustproof function of the gas spring, avoiding dust from adhering to the sliding connection between the piston rod 11 and the gas spring, causing wear to the connection, and is conducive to extending the service life of the gas spring.

[0022] The lower end of the piston rod 11 extends to the interior of the pressure cylinder 1 where a piston component 12 is fixedly installed. The upper end of the piston component 12 is located on the side of the piston rod 11 and a rubber anti-collision ring 14 is fixedly installed. An air cavity 15 is arranged inside the rubber anti-collision ring 14. The piston component 12 is slidably connected to the pressure cylinder 1. An inflation valve 16 is arranged on the lower side of the surface of the pressure cylinder 1. By arranging the rubber anti-collision ring 14 on the piston component 12, collision between the piston component 12 and the sealing guide sleeve 2 is avoided, a buffer is formed between the piston component 12 and the sealing guide sleeve 2, and the impact between the components is reduced, which is beneficial to extending the service life of the gas spring.

[0023] During operation, the dustproof ring 3 is used to block external impurities and improve the sealing performance of the gas spring. The snap ring 6 is used to strengthen the connection between the sealing ring 7 and the mounting groove 5, thereby improving the sealing effect of the sealing ring 7 and reducing the probability of leakage in the gas spring. The wear-resistant ring 4 provided in combination can effectively prevent leakage of the mechanical seal. The cleaning ring 10 is used to block and clean the dust on the surface of the piston rod 11. The elastic member 9 is used to continuously extend and extrude the cleaning ring 10, so that the cleaning ring 10 fits the piston rod 11 more closely, thereby facilitating the strengthening of the cleaning performance of the cleaning ring 10 and realizing the dustproof function of the gas spring. A rubber anti-collision ring 14 is provided on the piston component 12 to avoid collision between the piston components 12 and the sealing guide sleeve 2, thereby forming a buffer between the piston component 12 and the sealing guide sleeve 2 and reducing the impact between the components.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A gas spring with good sealing performance, comprising a pressure cylinder (1), characterized in that: The pressure cylinder (1) is provided with a sealing guide sleeve (2) at the upper end, a dust ring (3) is provided on the inner side of the sealing guide sleeve (2), a wear-resistant ring (4) is provided on the inner side of the sealing guide sleeve (2) below the dust ring (3), a mounting groove (5) is provided on the inner side of the sealing guide sleeve (2) below the wear-resistant ring (4), a clamping ring (6) is fixedly installed inside the mounting groove (5), a sealing ring (7) is clamped and connected to the clamping ring (6), a connecting piece (8) is fixedly installed on the upper end of the sealing guide sleeve (2), an elastic piece (9) is fixedly installed on the inner side of the connecting piece (8), a cleaning ring (10) is fixedly connected to the end of the elastic piece (9) away from the connecting piece (8), a piston rod (11) is slidably connected to the inner side of the sealing guide sleeve (2), and the lower end of the piston rod (11) extends to the inside of the pressure cylinder (1) and is fixedly installed with a piston component (12).

2. A gas spring with good sealing performance according to claim 1, characterized in that: The cross section of the snap ring (6) is designed to be a trapezoidal structure, and the sealing ring (7) and the mounting groove (5) are adapted to each other.

3. A gas spring with good sealing performance according to claim 1, characterized in that: The connecting member (8) is designed in an annular structure, and the elastic members (9) are distributed in an annular array.

4. A gas spring with good sealing performance according to claim 3, characterized in that: An air cavity (13) is provided inside the elastic member (9), and the cleaning ring (10) is slidably connected to the piston rod (11).

5. A gas spring with good sealing performance according to claim 4, characterized in that: The upper end of the piston component (12) is located on the side of the piston rod (11) and is fixedly mounted with a rubber anti-collision ring (14), and an air cavity 2 (15) is arranged inside the rubber anti-collision ring (14).

6. A gas spring with good sealing performance according to claim 5, characterized in that: The piston component (12) is slidably connected to the pressure cylinder (1), and an inflation valve (16) is provided on the lower side of the surface of the pressure cylinder (1).

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