Anti-rotation type gas spring

Abstract

The utility model discloses an anti-rotation type gas spring, which belongs to the technical field of gas springs, and is characterized by comprising a cylinder barrel, a piston rod, an anti-rotation mechanism and a guide sealing mechanism, the piston rod and the anti-rotation mechanism are arranged in the cylinder barrel, and the guide sealing mechanism is arranged on the rear side in the cylinder barrel. The rear side of the piston rod penetrates through the interior of the guide sealing mechanism and extends to the rear side of the cylinder barrel, and the front side of the interior of the cylinder barrel is filled with high-pressure nitrogen; the anti-rotation mechanism comprises a movable piston seat, the movable piston seat is arranged in the cylinder barrel in a sliding mode, guide sleeves are arranged on the two sides of the interior of the movable piston seat in an interference fit mode, guide rods penetrate through the interior of the guide sleeves, and by arranging the anti-rotation mechanism, the guide rods can be limited to only move in the linear direction in the stretching and retracting process of the piston rod; the rotation phenomenon caused by lateral force or other external force is effectively prevented, and the working stability and reliability of the gas spring are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas spring technical field, especially in a kind of anti-rotation gas spring. BACKGROUND

[0002] Gas spring is a kind of industrial accessories that can support, buffer, brake, height adjustment and angle adjustment, etc., it is composed of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler, cylinder control element and cylinder outside control element and joint, etc., principle is in the closed pressure cylinder fills in inert gas or oil gas mixture, the pressure in cavity is higher than several or several ten times of atmospheric pressure, the pressure difference that the cross-sectional area of piston rod is less than the cross-sectional area of piston is used to realize the movement of piston rod.

[0003] As a common elastic element, gas spring is widely used in automobile, furniture, mechanical equipment and other fields, for realizing support, buffering, power assisting and other functions, however, the existing gas spring has many defects in the process of use, especially in the scene needing to accurately control the movement direction of piston rod and prevent rotation.

[0004] Traditional gas spring is mainly composed of cylinder, piston rod, piston, sealing element and gas medium, in working, piston rod realizes telescopic function by the reciprocating motion of piston in cylinder, but in actual application, when gas spring is subjected to lateral force or other external force, piston rod is prone to rotation phenomenon, not only affects the normal use of gas spring, even can cause gas spring damage.

[0005] Therefore, an anti-rotation gas spring is proposed. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an anti-rotation gas spring, which can solve the problem that the existing traditional gas spring is mainly composed of cylinder, piston rod, piston, sealing element and gas medium, in working, piston rod realizes telescopic function by the reciprocating motion of piston in cylinder, but in actual application, when gas spring is subjected to lateral force or other external force, piston rod is prone to rotation phenomenon, not only affects the normal use of gas spring, even can cause gas spring damage.

[0007] To achieve the above object, the utility model provides the following technical scheme: an anti-rotation gas spring, comprising a cylinder, a piston rod, an anti-rotation mechanism and a guide sealing mechanism, the piston rod and the anti-rotation mechanism are arranged in the interior of the cylinder, the guide sealing mechanism is arranged at the rear side of the interior of the cylinder, the rear side of the piston rod penetrates the interior of the guide sealing mechanism and extends to the rear side of the cylinder, the front side of the interior of the cylinder is filled with high-pressure nitrogen;

[0008] The anti-rotation mechanism comprises a movable piston seat which is slidingly arranged in the interior of the cylinder barrel, the two sides of the interior of the movable piston seat are provided with guide sleeves in interference fit, and the interiors of the guide sleeves are penetrated by guide rods, the rear side of the guide rod is connected with a guide sealing mechanism, and the front side of the guide rod is provided with a support plate which is connected with the interior wall of the cylinder barrel on the side close to the interior wall.

[0009] Preferably, the guide sealing mechanism comprises a guide ring which is provided in interference fit on the rear side of the interior of the cylinder barrel, and the interior of the guide ring is provided with two annular protrusions.

[0010] Preferably, the rear side of each of the two annular protrusions is provided with a first sealing ring and a dustproof ring, and the interior walls of the first sealing ring and the dustproof ring are in close contact with the surface of the piston rod.

[0011] Preferably, the rear side of the interior wall of the guide ring is provided with an extension, the front side of the extension is in close contact with the dustproof ring, and the interior wall of the dustproof ring is provided with a plurality of annular grooves.

[0012] Preferably, the interior of the guide sleeve is annularly and rollingly provided with a plurality of rolling balls, and the surfaces of the rolling balls are in rolling contact with the guide rod.

[0013] Preferably, the interior of the movable piston seat is sleeved with a second sealing ring, and the surface of the second sealing ring is in sliding contact with the interior wall of the cylinder barrel.

[0014] Preferably, the front side of the interior of the cylinder barrel is threadedly connected with a cylinder bottom, the interior of the cylinder bottom is threadedly connected with a screw plug, and the rear side of the interior of the cylinder bottom is provided with an inflation valve.

[0015] Preferably, the rear side of the surface of the cylinder bottom is provided with a groove, and the interior of the groove is provided with a static seal, and the surface of the static seal is in contact with the interior wall of the cylinder barrel.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The anti-rotation mechanism is arranged, so that the piston rod can only move in a straight line during the extension and retraction process, the rotation phenomenon caused by lateral force or other external force is effectively prevented, and the stability and reliability of the gas spring are improved.

[0018] 2. The guide sealing mechanism is arranged, so that accurate guidance is provided for the movement of the piston rod, the piston rod is ensured to stably and reciprocally move in a straight line in the cylinder barrel, the friction and wear between the piston rod and the cylinder barrel are reduced, the working efficiency and service life of the gas spring are improved, the leakage of high-pressure nitrogen in the cylinder and the entry of dust and impurities from the outside are effectively prevented, and the reliability and service life of the gas spring are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Figure 1 is a whole structure diagram of the anti-rotation type gas spring of the present application;

[0020] Figure 2 Figure 2 is a connection diagram of the piston rod and the cylinder tube of the present application;

[0021] Figure 3 Figure 3 is a connection diagram of the anti-rotation mechanism, the piston rod and the guide sealing mechanism of the present application;

[0022] Figure 4 Figure 4 is a connection diagram of the anti-rotation mechanism and the piston rod of the present application;

[0023] Figure 5 Figure 5 is a connection diagram of the piston rod and the guide sealing mechanism of the present application;

[0024] Figure 6 Figure 6 is a connection diagram of the cylinder bottom and the cylinder tube of the present application.

[0025] In the figure, 1, cylinder tube; 2, piston rod; 3, anti-rotation mechanism; 31, moving piston seat; 32, guide sleeve; 33, guide rod; 34, support plate; 4, guide sealing mechanism; 41, guide ring; 42, annular protrusion; 43, first sealing ring; 44, dustproof ring; 45, extension part; 5, ball; 6, second sealing ring; 7, cylinder bottom; 8, screw plug; 9, static seal. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-6 The present application provides the technical solutions:

[0028] The anti-rotation type gas spring comprises a cylinder tube 1, a piston rod 2, an anti-rotation mechanism 3 and a guide sealing mechanism 4. The piston rod 2 and the anti-rotation mechanism 3 are arranged inside the cylinder tube 1. The guide sealing mechanism 4 is arranged at the rear side inside the cylinder tube 1. The rear side of the piston rod 2 penetrates the inside of the guide sealing mechanism 4 and extends to the rear side of the cylinder tube 1. The front side inside the cylinder tube 1 is filled with high-pressure nitrogen gas.

[0029] The anti-rotation mechanism 3 comprises a moving piston seat 31 which is slidingly arranged in the interior of the cylinder barrel 1, and the interior of the moving piston seat 31 is provided with a guide sleeve 32 on both sides in an interference fit, and the interior of the guide sleeve 32 penetrates a guide rod 33, the rear side of the guide rod 33 is connected with the guide sealing mechanism 4, and the front side of the guide rod 33 is provided with a support plate 34, and the side of the support plate 34 close to the inner wall of the cylinder barrel 1 is connected with the same.

[0030] In the embodiment: by arranging the anti-rotation mechanism 3, when the gas spring works, the high-pressure nitrogen gas pushes the moving piston seat 31 to slide in the cylinder barrel 1, and due to the cooperation of the guide sleeve 32 and the guide rod 33, the moving piston seat 31 can only move along the direction of the guide rod 33, thereby driving the piston rod 2 to make linear extension and contraction movement, realizing the anti-rotation function of the gas spring, effectively preventing the rotation phenomenon caused by the lateral force or other external force, and improving the stability and reliability of the gas spring work.

[0031] Specifically, as shown in Figure 5 The guide sealing mechanism 4 comprises a guide ring 41 which is arranged on the rear side of the interior of the cylinder barrel 1 in an interference fit, and the interior of the guide ring 41 is provided with two annular protrusions 42.

[0032] Specifically, as shown in Figure 5 The rear side of the two annular protrusions 42 is respectively provided with a first sealing ring 43 and a dustproof ring 44, and the inner wall of the first sealing ring 43 and the dustproof ring 44 is in close contact with the surface of the piston rod 2.

[0033] Specifically, as shown in Figure 5 The rear side of the inner wall of the guide ring 41 is provided with an extension 45, and the front side of the extension 45 is in close contact with the dustproof ring 44, and the inner wall of the dustproof ring 44 is provided with a plurality of annular grooves.

[0034] In the embodiment, the guide sealing mechanism 4 is arranged, the two annular protrusions 42 inside the guide ring 41 and the cooperation with the piston rod 2 provide accurate guidance for the movement of the piston rod 2, ensure the piston rod 2 to make a stable reciprocating linear motion in the cylinder 1, reduce the friction and wear between the piston rod 2 and the cylinder 1, improve the working efficiency and service life of the gas spring, the first sealing ring 43 prevents high-pressure nitrogen from escaping from the gap between the piston rod 2 and the cylinder 1, ensures the stability of the pressure inside the gas spring, maintains the normal working performance, and the dustproof ring 44 can prevent dust and impurities from adhering to the surface of the piston rod 2, avoid these pollutants from entering the inside of the cylinder 1, cause wear to the piston and the sealing element, further improve the reliability and service life of the gas spring, the extension 45 at the rear side of the inner wall of the guide ring 41 is in close contact with the dustproof ring 44, and the annular grooves on the inner wall of the dustproof ring 44 are designed, which enhances the sealing and protection effect of the dustproof ring 44, the extension 45 can better fix the dustproof ring 44 to prevent it from moving during the movement of the piston rod 2, and the annular grooves can increase the contact area between the dustproof ring 44 and the piston rod 2 to improve the dustproof effect.

[0035] Specifically, as shown in Figure 4 , the inside of the guide sleeve 32 is annularly arranged with a plurality of rolling balls 5, and the surface of the rolling ball 5 is in rolling contact with the guide rod 33.

[0036] Specifically, as shown in Figure 4 , the inside of the moving piston seat 31 is sleeved with a second sealing ring 6, and the surface of the second sealing ring 6 is in sliding contact with the inner wall of the cylinder 1.

[0037] In the embodiment, the plurality of rolling balls 5 arranged in the inside of the guide sleeve 32 in a ring shape convert the sliding friction between the guide sleeve 32 and the guide rod 33 into rolling friction, greatly reducing the friction, making the extension and contraction movement of the piston rod 2 more smooth, improving the working efficiency of the gas spring, and at the same time reducing the wear of the guide sleeve 32 and the guide rod 33, prolonging the service life thereof; the second sealing ring 6 is sleeved in the inside of the moving piston seat 31 and in sliding contact with the inner wall of the cylinder 1, effectively preventing high-pressure nitrogen from leaking from the gap between the moving piston seat 31 and the cylinder 1, ensuring the stability of the pressure inside the gas spring and maintaining the normal working performance of the gas spring.

[0038] Specifically, as shown in Figure 6 , the front side of the inside of the cylinder 1 is threadedly connected with a cylinder bottom 7, the inside of the cylinder bottom 7 is threadedly connected with a screw plug 8, and the rear side of the inside of the cylinder bottom 7 is provided with a gas filling valve.

[0039] Specifically, as shown in Figure 6 , the rear side of the surface of the cylinder bottom 7 is provided with a groove, and the inside of the groove is provided with a static seal 9, and the surface of the static seal 9 is in contact with the inner wall of the cylinder 1.

[0040] In the embodiment: through the cylinder bottom 7 and the cylinder barrel 1 inside front threaded connection, convenient installation and disassembly, easy to maintain and overhaul the cylinder barrel 1 inside, and the screw plug 8 is connected with the cylinder bottom 7, and the setting of the inflation valve, it is convenient to the high pressure nitrogen in the cylinder barrel 1 is filled with gas operation, it is convenient to adjust the working pressure of gas spring, to adapt to different work requirements, through the static seal 9 arranged in the groove on the surface of the cylinder bottom 7, further enhance the sealing performance between the cylinder bottom 7 and the cylinder barrel 1, prevent high pressure nitrogen from the leakage of the joint between the cylinder bottom 7 and the cylinder barrel 1.

[0041] Working principle: when the gas spring works, the high pressure nitrogen in the cylinder barrel 1 pushes the moving piston seat 31 to slide in the cylinder barrel 1, since the cooperation of the guide sleeve 32 and the guide rod 33, the moving piston seat 31 can only move along the direction of the guide rod 33, and then drive the piston rod 2 to make linear extension and contraction movement, effectively prevent the piston rod 2 from rotating due to lateral force or other external force, ensure the stability and reliability of the gas spring, in the guide sleeve 32, the several ring-shaped rolling balls 5 arranged in the guide sleeve 32 convert the sliding friction between the guide sleeve 32 and the guide rod 33 into rolling friction, reduce the friction, make the piston rod 2 extension and contraction movement more smooth, improve the work efficiency, at the same time, reduce the wear of the guide sleeve 32 and the guide rod 33, and the guide ring 41 in the guide sealing mechanism 4, the two annular protrusions 42 in the guide ring 41 cooperate with the piston rod 2, provide accurate guide for the movement of the piston rod 2, ensure the piston rod 2 to make reciprocating linear motion in the cylinder barrel 1 stably, reduce the friction and wear between the piston rod 2 and the cylinder barrel 1, the first sealing ring 43 prevents the high pressure nitrogen from escaping from the gap between the piston rod 2 and the cylinder barrel 1, ensures the stability of the internal pressure of the gas spring, maintains the normal working performance, the dustproof ring 44 prevents dust and impurities from adhering to the surface of the piston rod 2, avoids the pollution to cause wear to the piston, sealing element and the like, in the working process of the gas spring, if the working pressure needs to be adjusted, the screw plug 8 can be unscrewed, the high pressure nitrogen in the cylinder barrel 1 is filled with gas operation through the inflation valve, to adapt to different work requirements.

[0042] It should be noted that the working principle and the use mode of the gas spring and the inflation valve and the like structure in the utility model are all prior art, therefore the specific structure, principle and use mode are not described in the utility model, and only a brief description is made here.

[0043] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A non-reversing gas spring comprising a cylinder (1), a piston rod (2), a non-reversing mechanism (3) and a guide sealing mechanism (4), characterized in that: The piston rod (2) and the anti-rotation mechanism (3) are arranged in the interior of the cylinder barrel (1), the guide sealing mechanism (4) is arranged at the rear side of the interior of the cylinder barrel (1), the rear side of the piston rod (2) penetrates the interior of the guide sealing mechanism (4) and extends to the rear side of the cylinder barrel (1), and the front side of the interior of the cylinder barrel (1) is filled with high-pressure nitrogen gas. The anti-rotation mechanism (3) comprises a movable piston seat (31), the movable piston seat (31) is slidingly arranged in the interior of the cylinder barrel (1), the two sides of the interior of the movable piston seat (31) are both provided with a guide sleeve (32) in an interference fit, the interior of the guide sleeve (32) penetrates a guide rod (33), the rear side of the guide rod (33) is connected with the guide sealing mechanism (4), and the front side of the guide rod (33) is provided with a support plate (34), and one side of the support plate (34) close to the inner wall of the cylinder barrel (1) is connected with the inner wall.

2. A non-reversing gas spring according to claim 1, characterized in that: The guide sealing mechanism (4) comprises a guide ring (41), the guide ring (41) is arranged on the rear side of the interior of the cylinder barrel (1) in an interference fit, and the interior of the guide ring (41) is provided with two annular protrusions (42).

3. A non-reversing gas spring according to claim 2, characterized in that: The rear side of the two annular protrusions (42) is respectively provided with a first sealing ring (43) and a dustproof ring (44), and the inner wall of the first sealing ring (43) and the dustproof ring (44) is in close contact with the surface of the piston rod (2).

4. A non-reversing gas spring according to claim 3, characterized in that: The rear side of the inner wall of the guide ring (41) is provided with an extension (45), the front side of the extension (45) is in close contact with the dustproof ring (44), and the inner wall of the dustproof ring (44) is provided with a plurality of annular grooves.

5. A non-reversing gas spring according to claim 1, characterized in that: The interior of the guide sleeve (32) is annularly and rollingly provided with a plurality of rolling balls (5), and the surface of the rolling ball (5) is in rolling contact with the guide rod (33).

6. A non-reversing gas spring according to claim 1, characterized in that: The interior of the movable piston seat (31) is sleeved with a second sealing ring (6), and the surface of the second sealing ring (6) is in sliding contact with the inner wall of the cylinder barrel (1).

7. A non-reversing gas spring according to claim 1, wherein: The front side of the interior of the cylinder barrel (1) is threadedly connected with a cylinder bottom (7), the interior of the cylinder bottom (7) is threadedly connected with a screw plug (8), and the rear side of the interior of the cylinder bottom (7) is provided with an inflation valve.

8. A non-reversing gas spring according to claim 7, characterized in that: The rear side of the surface of the cylinder bottom (7) is provided with a groove, and the interior of the groove is provided with a static seal (9), and the surface of the static seal (9) is in contact with the inner wall of the cylinder barrel (1).

Images