Cylinder barrel pressure groove air spring

Abstract

The utility model relates to the technical field of gas springs, and discloses a cylinder barrel pressure groove gas spring which comprises a cylinder barrel, an air pressure piston, a piston rod, a tail plug and a guide sealing mechanism, the cylinder barrel comprises a cavity, the cavity is filled with high-pressure nitrogen, the side wall of the cylinder barrel is provided with a pressure relief groove in the axial direction of the cylinder barrel, and the air pressure piston and the cylinder barrel form a ventilation channel at the pressure relief groove; one end of the piston rod is fixedly connected with the air pressure piston, and one end of the piston rod is arranged in the guide sealing mechanism in a sealed and penetrating mode and extends out of the cylinder barrel. The other end of the tail plug extends out of the cylinder barrel. The guide sealing mechanism is connected to the end, away from the tail plug, of the cylinder barrel in a sealed mode. The pressure relief groove is formed in the side wall of the cylinder barrel and used for being communicated with the cavities in the two sides of the air pressure piston, so that the air pressure piston slowly moves in the cylinder barrel.

Description

Technical Field

[0001] The present application relates to the technical field of gas springs, and in particular to a cylinder groove gas spring. Background Art

[0002] Gas spring is an industrial accessory that can support, buffer, brake, adjust height and angle, etc. It consists of the following parts: pressure cylinder, piston rod, pneumatic piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), control element inside the cylinder and control element outside the cylinder (referring to controllable gas spring) and joints, etc.

[0003] The existing gas spring has a damping hole on the piston. When the piston moves, the air pressure on both sides of the piston may change too quickly, causing impact. Utility Model Content

[0004] In order to improve the problem of too fast air pressure changes on both sides of the piston, the present application provides a cylinder groove gas spring.

[0005] The present application provides a cylinder groove gas spring, which adopts the following technical solution:

[0006] A cylinder groove gas spring comprises a cylinder, a pneumatic piston, a piston rod, a tail plug and a guide sealing mechanism, wherein the cylinder comprises a cavity filled with high-pressure nitrogen, the side wall of the cylinder is provided with a pressure relief groove along the axial direction of the cylinder, and the pneumatic piston and the cylinder form a ventilation channel at the pressure relief groove; one end of the tail plug is sealedly connected to the end of the cylinder, and the other end extends to the outside of the cylinder, the guide sealing mechanism is sealedly connected to the end of the cylinder away from the tail plug, the pneumatic piston is slidably connected in the cylinder, one end of the piston rod is fixedly connected to the pneumatic piston, and the end of the piston rod away from the pneumatic piston is sealed and penetrated in the guide sealing mechanism and extends to the outside of the cylinder.

[0007] By adopting the above technical scheme, the tail plug and the guide sealing mechanism are respectively sealed at the two ends of the cylinder, and a cavity with two ends sealed is formed in the cylinder; the guide sealing mechanism is used to limit the axial movement of the piston rod along the cylinder, so that the movement of the piston rod is stable, and is sealed and connected with the piston rod to prevent leakage; the pressure relief groove is used to connect the cavities on both sides of the pneumatic piston to balance the gas pressure in the cylinder, thereby reducing the pressure in the cylinder, which helps to protect the cylinder from the dangers of too low or too high pressure and improve the stability and service life of the gas spring.

[0008] Optionally, the depth of the pressure relief groove close to one end of the piston rod is smaller than the depth away from one end of the piston rod.

[0009] By adopting the above technical solution, the greater the impact intensity on the piston rod, the greater the compression amount, the deeper the pressure relief groove, and the larger the aperture of the ventilation channel formed, which is more conducive to balancing the air pressure.

[0010] Optionally, the pneumatic piston includes a valve body, and at least one sealing member is provided on the valve body. The sealing member is respectively pressed against the inner wall of the cylinder and the valve body, and a mounting hole for connecting the piston rod is provided on the valve body.

[0011] By adopting the above technical solution, at least one sealing member is arranged between the pneumatic piston and the cylinder barrel to ensure the sealing performance between the floating piston and the cylinder barrel.

[0012] Optionally, the guide sealing mechanism includes a guide sleeve, a sealing sleeve, a bushing tube and a spacer sleeve, the guide sleeve is sealingly connected to the cylinder, one end of the guide sleeve is pressed against a first folding portion provided at the end of the cylinder, and the other end is pressed against the spacer sleeve, a step hole is provided in the guide sleeve, the bushing tube is placed in the step hole, the sealing sleeve is placed in the step hole and is pressed against the bushing tube, the spacer sleeve is sealingly connected to the cylinder, one end of the spacer sleeve away from the guide sleeve is pressed against a limiting portion provided in the cylinder, the piston rod is successively passed through the spacer sleeve, the sealing sleeve and the bushing tube, and the piston rod is sealingly connected to the spacer sleeve.

[0013] By adopting the above technical solution, when the piston rod slides along the axial direction of the cylinder, it is guided by the dual functions of the guide sleeve and the spacer sleeve, and the piston rod is sealed by the sealing sleeve to prevent the gas in the cavity from leaking to the outside.

[0014] Optionally, a limiting portion is provided at one end of the cylinder barrel close to the guide sealing mechanism, for limiting the position of the guide sealing mechanism and limiting the stroke of the pneumatic piston.

[0015] By adopting the above technical solution, the limiting part is used to limit the guide sealing mechanism, fix the guide sealing mechanism to the end of the cylinder, and at the same time the limiting part limits the maximum stroke of the hydraulic piston.

[0016] Optionally, the tail plug includes a main body and several fourth sealing rings, and the several fourth sealing rings are respectively pressed against the outer wall of the main body and the inner wall of the cylinder, and the end of the cylinder is provided with a second folding portion for limiting the tail plug, and the side of the main body away from the pneumatic piston is in contact with the second folding portion.

[0017] By adopting the above technical solution, the tail plug is sealed with the cylinder barrel through a plurality of fourth sealing rings to prevent leakage; the second folding portion arranged at the end of the cylinder barrel prevents the tail plug from falling off from the cylinder barrel.

[0018] Optionally, a first connecting member is provided at one end of the piston rod outside the cylinder, and a second connecting member is provided at one end of the tail plug extending outside the cylinder.

[0019] By adopting the above technical solution, the first connecting member and the second connecting member play a role of fixed connection, which is convenient for the installation or testing of the gas spring; the second connecting member also plays a role of fixing the tail plug, so that the tail plug is fixed to the end of the cylinder.

[0020] Optionally, a dustproof telescopic sleeve is provided at one end of the cylinder barrel close to the guide sealing mechanism, and the dustproof telescopic sleeve includes a sleeve connection portion and a telescopic portion, the sleeve connection portion is sleeved on the end of the cylinder barrel close to the guide sealing mechanism, and the piston rod is inserted into the telescopic portion.

[0021] By adopting the above technical solution, the dustproof telescopic sleeve is used to prevent dust from entering the interior of the cylinder body and the gap between the piston rod and the guide sealing mechanism, thereby ensuring smooth pushing and pulling of the piston rod.

[0022] To summarize, the present application includes at least one of the following beneficial technical effects: the cavities on both sides of the pneumatic piston are connected through the pressure relief groove, and when the piston rod is extended, the pressure relief groove balances the gas pressure and reduces the pressure in the cylinder; the advantage of pressure relief grooves of different depths is that: the greater the impact intensity of the piston rod and the greater the compression amount, the deeper the pressure relief groove, thereby forming a larger aperture of the ventilation channel, which is more conducive to balancing the air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the cylinder groove gas spring in Example 1 of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the pressure relief groove of Example 1 of the present application.

[0025] Figure 3 It is a structural schematic diagram of the guide sealing mechanism of Example 1 of the present application.

[0026] Figure 4 It is a schematic diagram of the structure of the pneumatic piston in Example 1 of the present application.

[0027] Figure 5 It is a schematic structural diagram of the dustproof telescopic sleeve of Example 2 of the present application.

[0028] : 1. Cylinder barrel; 11. Cavity; 12. Pressure relief groove; 121. First inclined groove; 122. Second inclined groove; 13. First folding portion; 14. Second folding portion; 15. Limiting portion; 2. Pneumatic piston; 21. Valve body; 22. Sealing member; 3. Piston rod; 4. Tail plug; 41. Main body; 42. Fourth sealing ring; 5. Guide sealing mechanism; 51. Guide sleeve; 52. Sealing sleeve; 53. Spacer sleeve; 54. Bushing tube; 55. First sealing ring; 56. Second sealing ring; 57. Third sealing ring; 58. Step hole; 6. First connecting member; 7. Second connecting member; 8. Dustproof telescopic sleeve; 81. Socket joint; 82. Telescopic portion. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings.

[0030] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] Embodiment 1:

[0032] The present application embodiment discloses a cylinder groove gas spring, referring to Figure 1 , comprising a cylinder 1, a pneumatic piston 2, a piston rod 3, a tail plug 4 and a guide sealing mechanism 5, wherein one end of the tail plug 4 is disposed at one end of the cylinder 1, and the other end of the tail plug 4 extends outside the cylinder 1; the guide sealing mechanism 5 is disposed at the end of the cylinder 1 away from the tail plug 4, the pneumatic piston 2 is slidably connected in the cylinder 1, one end of the piston rod 3 is riveted to the pneumatic piston 2, the end of the piston rod 3 away from the pneumatic piston 2 is slidably arranged in the guide sealing mechanism 5, and extends outside the cylinder 1, a first connecting member 6 is disposed at the end of the piston rod 3 outside the cylinder 1, and a second connecting member 7 is disposed at the end of the tail plug 4 extending outside the cylinder 1.

[0033] Reference Figure 1 and Figure 2The cylinder 1 is a hollow tubular structure, and a cavity 11 is formed in the cylinder 1. The cavity 11 is filled with high-pressure nitrogen. The pneumatic piston 2 divides the cavity 11 into a first air cavity and a second air cavity. The two ends of the cylinder 1 are respectively provided with a first folding portion 13 and a second folding portion 14 formed by folding the cylinder 1 inward. The end of the cylinder 1 close to the first folding portion 13 is provided with a limiting portion 15. The limiting portion 15 protrudes inward from the side wall of the cylinder 1 to form an annular protrusion structure. The side wall of the cylinder 1 is provided with a pressure relief groove 12 along the axial direction of the cylinder 1. The pressure relief groove 12 protrudes outward from the side wall of the cylinder 1 to form a long strip-shaped groove. The pneumatic piston 2 and the cylinder 1 form a ventilation channel at the pressure relief groove 12, which is used to connect the cavities 11 on both sides of the pneumatic piston 2. The pressure relief groove 12 is located between the second folding portion 14 and the limiting portion 15; the depth of the pressure relief groove 12 close to the end of the piston rod 3 is less than the depth away from the end of the piston rod 3. Specifically, the end of the pressure relief groove 12 is provided with a first inclined groove 121 and a second inclined groove 122, both of which are gradual structures, and the inclination rate of the first inclined groove 121 is smaller than the inclination rate of the second inclined groove 122. When in use, the greater the impact intensity of the piston rod 3, the greater the compression amount, the deeper the pressure relief groove 12, and the larger the aperture of the ventilation channel formed, which is more conducive to balancing the air pressure.

[0034] The tail plug 4 includes a body 41 and a plurality of fourth sealing rings 42. One end of the body 41 is placed in the cylinder 1. The side of the body 41 away from the pneumatic piston 2 abuts against the second folded portion 14. The second connecting member 7 is threadedly connected to the end of the body 41 extending outside the cylinder 1, and the end of the second connecting member 7 close to the cylinder 1 abuts against the outside of the first folded portion 13 to fix the body 41 to the end of the cylinder 1. The fourth sealing ring 42 is arranged at the end of the body 41 located in the cylinder 1. The fourth sealing ring 42 is respectively pressed against the inner wall of the cylinder 1 and the outer wall of the body 41 to ensure the sealing between the tail plug 4 and the cylinder 1 and prevent gas leakage.

[0035] Reference Figure 1 and Figure 3The guide sealing mechanism 5 includes a guide sleeve 51, a sealing sleeve 52, a bushing tube 54 and a spacer sleeve 53. A step hole 58 is provided in the guide sleeve 51. The bushing tube 54 has a T-shaped cross section. The bushing tube 54 is placed in the step hole 58. The outer wall of the bushing tube 54 is pressed against the inner wall of the guide sleeve 51. The sealing sleeve 52 is placed in the step hole 58 and pressed against the inner wall of the guide sleeve 51 and the end of the bushing tube 54. One end of the guide sleeve 51 is pressed against the inner wall of the first folded portion 13. The side of the sealing sleeve 52 away from the bushing tube 54 is flush with the side of the guide sleeve 51 away from the first folded portion 13. A first sealing ring 55 is provided on the outer wall of the guide sleeve 51 and pressed against the inner wall of the cylinder 1. The spacer 53 is a cylindrical structure. A through hole is axially opened in the spacer 53 for passing the piston rod 3. The spacer 53 is sealed and connected to the cylinder 1. One side of the spacer 53 is flush with the guide sleeve 51 and the sealing sleeve 52 and is pressed against the other side. The other side of the spacer 53 is in contact with the limiting portion 15. The guide sealing mechanism 5 is limited to the end of the cylinder 1 through the first folding portion 13 and the limiting portion 15. A second sealing ring 56 is arranged on the outer wall of the spacer 53 to contact the inner wall of the cylinder 1. The piston rod 3 is slidably passed through the spacer 53, the sealing sleeve 52 and the bushing tube 54 in sequence. The inner wall of the sealing sleeve 52 is pressed against the surface of the piston rod 3. A third sealing ring 57 is arranged in the spacer 53 to press against the surface of the piston rod 3 to ensure the sealing performance of the guide sealing mechanism 5 with the inner wall of the cylinder 1 and the piston rod 3.

[0036] Reference Figure 1 and Figure 4 The pneumatic piston 2 is cylindrical in structure and includes a valve body 21. The valve body 21 is cylindrical in structure and is provided with at least one sealing member 22. The sealing member 22 is respectively pressed against the inner wall of the cylinder 1 and the valve body 21 to ensure the sealing between the pneumatic piston 2 and the inner wall of the cylinder 1. The valve body 21 is axially provided with a mounting hole for connecting the piston rod 3. The end of the piston rod 3 is placed in the mounting hole and is riveted to the valve body 21.

[0037] The first connecting member 6 and the second connecting member 7 can be a sheet joint, a steel joint, a plastic joint, etc.

[0038] The surface of the cylinder 1 is spray-painted, and the surface of the piston rod 3 is QPQ treated.

[0039] The implementation principle of a cylinder groove gas spring in an embodiment of the present application is: when in use, the piston rod 3 is pushed, and when the pneumatic piston 2 moves in the cylinder 1, the gas in the cavities 11 on both sides of the pneumatic piston 2 flows through the pressure relief groove 12, and the piston rod 3 is subjected to the damping force. The gas pressure is balanced through the pressure relief groove 12, and the pressure in the cylinder 1 is reduced, so that the piston rod 3 moves slowly; the inclination rate of the first inclined groove 121 is smaller than the inclination rate of the second inclined groove 122. The greater the impact intensity on the piston rod 3 and the greater the compression amount, the deeper the pressure relief groove 12, and the larger the aperture of the ventilation channel formed, which is more conducive to balancing the air pressure.

[0040] Embodiment 2:

[0041] The structure of this embodiment is basically the same as that of embodiment 1, except that a dustproof telescopic sleeve 8 is provided at the end of the cylinder barrel 1: Figure 5 The end of the cylinder 1 close to the guide sealing mechanism 5 is provided with a dustproof telescopic sleeve 8. The dustproof telescopic sleeve 8 is made of elastic rubber material. The dustproof telescopic sleeve 8 is a hollow integrated structure. The dustproof telescopic sleeve 8 includes a sleeve connection portion 81 and a telescopic portion 82. The sleeve connection portion 81 is sleeved on the side wall outside the end of the cylinder 1 close to the guide sealing mechanism 5, and is adhered to the outer wall of the cylinder 1 by glue to prevent the sleeve connection portion 81 from falling off. The telescopic portion 82 is a continuously bent structure, and the telescopic portion 82 is easy to telescope when subjected to external force. The end of the piston rod 3 located outside the cylinder 1 is penetrated in the telescopic portion 82, and the bent portion of the telescopic portion 82 close to the piston rod 3 is pressed against the surface of the piston rod 3 to prevent external dust from entering the cylinder 1.

[0042] The implementation principle of a cylinder groove gas spring in an embodiment of the present application is: the sleeve portion 81 is adhered to the outer wall of the end of the cylinder 1 to prevent the sleeve portion 81 from falling off; the telescopic portion 82 is sealed and connected to the piston rod 3 to prevent dust from entering, and when the telescopic portion 82 is acted upon by an external force, the telescopic portion 82 telescopes in the direction of the force.

[0043] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cylinder groove gas spring, characterized in that: The invention comprises a cylinder barrel (1), a pneumatic piston (2), a piston rod (3), a tail plug (4) and a guide sealing mechanism (5); the cylinder barrel (1) comprises a cavity (11), the cavity (11) is filled with high-pressure nitrogen, the side wall of the cylinder barrel (1) is provided with a pressure relief groove (12) along the axial direction of the cylinder barrel (1), the pneumatic piston (2) and the cylinder barrel (1) form a ventilation channel at the pressure relief groove (12); one end of the tail plug (4) is sealed and connected to the cylinder barrel The pneumatic piston (2) is slidably connected to the cylinder (1), and one end of the piston rod (3) is fixedly connected to the pneumatic piston (2). The end of the piston rod (3) is sealed and penetrated into the guide sealing mechanism (5) and extends to the outside of the cylinder (1).

2. The cylinder groove gas spring according to claim 1, characterized in that: The depth of the pressure relief groove (12) close to one end of the piston rod (3) is smaller than the depth of the end far from the piston rod (3).

3. The cylinder groove gas spring according to claim 1, characterized in that: The pneumatic piston (2) comprises a valve body (21), on which at least one sealing member (22) is arranged, and the sealing member (22) is respectively pressed against the inner wall of the cylinder barrel (1) and the valve body (21), and a mounting hole for connecting the piston rod (3) is provided on the valve body (21).

4. The cylinder groove gas spring according to claim 1, characterized in that: The guide sealing mechanism (5) comprises a guide sleeve (51), a sealing sleeve (52), a bushing tube (54) and a spacer sleeve (53); the guide sleeve (51) is sealed and connected to the cylinder barrel (1); one end of the guide sleeve (51) is tightly abutted against a first folded portion (13) provided at the end of the cylinder barrel (1); the other end of the guide sleeve (51) is tightly abutted against the spacer sleeve (53); a step hole (58) is provided in the guide sleeve (51); the bushing tube (54) is placed in the step hole (58); The sealing sleeve (52) is placed in the step hole (58) and abuts against the bushing tube (54); the spacer sleeve (53) is sealingly connected to the cylinder barrel (1); the end of the spacer sleeve (53) away from the guide sleeve (51) is tightly abutted against a limiting portion (15) provided in the cylinder barrel (1); the piston rod (3) is successively inserted into the spacer sleeve (53), the sealing sleeve (52) and the bushing tube (54); and the piston rod (3) is sealingly connected to the spacer sleeve (53).

5. The cylinder groove gas spring according to claim 1, characterized in that: A limiting portion (15) is provided at one end of the cylinder barrel (1) close to the guide sealing mechanism (5) for limiting the position of the guide sealing mechanism (5) and limiting the stroke of the pneumatic piston (2).

6. The cylinder groove gas spring according to claim 1, characterized in that: The tail plug (4) comprises a main body (41) and a plurality of fourth sealing rings (42), wherein the plurality of fourth sealing rings (42) are respectively pressed against the outer wall of the main body (41) and the inner wall of the cylinder (1), and a second folding portion (14) for limiting the tail plug (4) is provided at the end of the cylinder (1), and a side of the main body (41) away from the pneumatic piston (2) is pressed against the second folding portion (14).

7. The cylinder groove gas spring according to claim 1, characterized in that: A first connecting member (6) is provided at one end of the piston rod (3) located outside the cylinder barrel (1), and a second connecting member (7) is provided at one end of the tail plug (4) extending outside the cylinder barrel (1).

8. The cylinder groove gas spring according to claim 1, characterized in that: A dustproof telescopic sleeve (8) is provided at one end of the cylinder barrel (1) close to the guide sealing mechanism (5); the dustproof telescopic sleeve (8) comprises a sleeve connection portion (81) and a telescopic portion (82); the sleeve connection portion (81) is sleeved on the end of the cylinder barrel (1) close to the guide sealing mechanism (5); and the piston rod (3) is inserted into the telescopic portion (82).

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