Pneumatic rod guide sleeve with sealing structure

Abstract

The utility model discloses a pneumatic rod guide sleeve with a sealing structure, which belongs to the technical field of pneumatic rod guide sleeves and comprises a mechanical transmission frame, a pneumatic support component is mounted on one side of the mechanical transmission frame and comprises a sealing guide cylinder, and an upper end cover is mounted at one end of the sealing guide cylinder. A lower end cover is arranged at the end, away from the upper end cover, of the sealing guide cylinder, and elastic sealing pieces are further arranged between the lower end cover and the sealing guide cylinder and between the upper end cover and the sealing guide cylinder. The elastic sealing piece can be adjusted in a self-adaptive and telescopic mode according to the size of a connecting gap between the double-face threaded groove and the rubber sealing ring, tiny gaps generated between the double-face threaded groove and the rubber sealing ring can be effectively filled, and therefore the air tightness of connection between the metal barrel and the first airtight cover body and the air tightness of connection between the metal barrel and the second airtight cover body can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air pressure rod guide sleeve, especially to an air pressure rod guide sleeve with a sealing structure. BACKGROUND

[0002] Air pressure rod, also known as gas spring or gas strut, is a mechanical device that uses gas pressure to provide support and cushioning. It is usually composed of a sealed cylinder and a piston rod, and the cylinder is filled with high-pressure gas or gas-liquid mixture. When the air pressure rod is under stress, the internal gas produces elastic force through compression or expansion, pushing the piston rod to extend or retract. Air pressure rod is widely used in applications that require support, cushioning or position adjustment, such as car tailgates, height adjustment of office chairs, hood support, etc. Compared with traditional springs, air pressure rod has smoother movement and can achieve different support forces by adjusting internal pressure. In addition, it also has the advantages of durability, compact structure and easy installation, so it is widely used in industrial and civil equipment.

[0003] At present, the existing air pressure rod adopts threaded connection assembly between the sealed cylinder and the end cap installed at both ends during use. However, since the connection between the sealed cylinder and the end cap is not equipped with additional sealing auxiliary structure, this leads to certain optimization space for the sealing performance of traditional air pressure rod. In actual application, the sealed cylinder may increase the risk of gas leakage when it is subjected to bumps, thereby affecting its sealing effect. Therefore, there is still room for further improvement during use to ensure its stability and air tightness under different working conditions.

[0004] Based on this, we propose an air pressure rod guide sleeve with a sealing structure to solve the above-mentioned problems. SUMMARY

[0005] The purpose of this section is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] Therefore, the utility model aims to provide an air pressure rod guide sleeve with a sealing structure to solve the problem of insufficient air tightness due to the lack of sealing auxiliary structure between the sealed cylinder and the end cap, and the problem of easy gas leakage when the sealed cylinder is subjected to bumps during use.

[0007] In order to solve the above technical problems, the utility model provides a pneumatic rod guide sleeve with a sealing structure, which adopts the following technical solution: comprising a mechanical transmission frame, a pneumatic support assembly is installed on one side of the mechanical transmission frame, the pneumatic support assembly includes a sealing guide cylinder, an upper end cover is installed at one end of the sealing guide cylinder, a lower end cover is provided at the end of the sealing guide cylinder away from the upper end cover, and elastic sealing members are respectively provided between the connection points of the lower end cover, the upper end cover and the sealing guide cylinder;

[0008] The elastic sealing member comprises a rubber sealing ring, and an annular rubber plate is connected between one side of two groups of rubber sealing rings;

[0009] The inner sides of the two groups of rubber sealing rings are provided with telescopic adjustment grooves, and both sides of the annular rubber plate are provided with annular baffles, which match the telescopic adjustment groove structure. Several groups of compression springs are also connected between the annular baffles and the telescopic adjustment grooves.

[0010] By adopting the above-mentioned technical solution, this solution uses double-sided threaded rings installed at both ends of the metal cylinder, and double-sided threaded grooves opened around one side of the second airtight cover and the first airtight cover, to fix the first airtight cover and the second airtight cover at both ends of the metal cylinder by threaded cooperation. The installed elastic seal, composed of a rubber sealing ring and an annular rubber plate, ensures the airtightness of the threaded connection. Through the action of the compression spring between the annular baffle and the telescopic adjustment groove, the elastic seal can adaptively fill the gap between the double-sided threaded groove and the rubber sealing ring, thereby improving the sealing effect. When the metal cylinder is bumped, the internal isolation cavity and reinforcement ribs can effectively prevent the leakage of high-pressure gas and increase the support strength, thereby improving safety performance and avoiding deformation caused by bumps or sudden increases in air pressure.

[0011] Optionally, the sealing guide cylinder includes a metal cylinder, and double-sided threaded rings are respectively installed at both ends of the metal cylinder.

[0012] By adopting the above technical solution, the sealing guide cylinder in this solution is through the metal cylinder and the double-sided threaded rings installed at both ends. The role in the patent is mainly reflected in improving the overall air tightness and connection stability of the gas pressure rod. By adding double-sided threaded rings at both ends of the metal cylinder, a firm threaded connection can be formed with the double-sided threaded grooves of the first airtight cover and the second airtight cover, ensuring that the gas pressure rod does not loosen when subjected to air pressure. Combined with the design of thread matching, the connection between the two end covers and the metal cylinder is more stable, further improving the sealing performance of the equipment and effectively preventing high-pressure gas leakage.

[0013] Optionally, a plurality of isolation cavities are provided around the interior of the metal cylinder, and reinforcing ribs are provided inside the isolation cavities.

[0014] By adopting the above technical scheme, through the multiple sets of isolation cavities arranged in the metal cylinder and the reinforcing ribs arranged in the isolation cavities, key protection is achieved in the patent, the design of the isolation cavities can effectively buffer external impact, reduce damage caused by bumping during use, prevent deformation or penetration of the metal cylinder, thereby reducing the risk of high-pressure gas leakage, and the design of the reinforcing ribs further enhances the structural strength of the metal cylinder and improves the overall support capacity, ensuring that the air pressure rod can still maintain stability when bearing external force.

[0015] Optionally, the upper end cover comprises a first airtight cover body, and a support sliding sleeve is arranged on the top of the first airtight cover body.

[0016] By adopting the above technical scheme, the upper end cover in the present scheme ensures the airtightness of the telescopic adjustment of the top components of the air pressure rod through the first airtight cover body and the support sliding sleeve arranged on the top of the first airtight cover body, prevents high-pressure gas leakage, and at the same time provides a closed environment for the internal components to maintain a stable working state.

[0017] Optionally, a piston rod is slidably connected to the middle part of the support sliding sleeve and the first airtight cover body, the piston rod is in transition fit with the support sliding sleeve and the first airtight cover body, and a piston block is further arranged at one end of the piston rod, and the piston block is in transition fit with the metal cylinder.

[0018] By adopting the above technical scheme, the sliding connection between the support sliding sleeve and the middle part of the first airtight cover body is realized through the piston rod, the piston rod as a key component for transmission and support is in transition fit with the support sliding sleeve and the first airtight cover body, and the stability and flexibility of the piston body during movement are ensured.

[0019] Optionally, the lower end cover comprises a second airtight cover body, and a hinge plate is arranged at one end of the piston rod and the second airtight cover body, and a gas pressure delivery pipe is further connected to one side of the second airtight cover body.

[0020] By adopting the above technical scheme, the hinge plates respectively arranged at one end of the piston rod and the second airtight cover body can movably connect the air pressure support assembly to the two ends of the mechanical transmission frame.

[0021] Optionally, an air inlet is arranged in the middle part of the side of the second airtight cover body away from the hinge plate, double-sided thread grooves are further arranged around one side of the second airtight cover body and the first airtight cover body, the double-sided thread grooves are in transition fit with rubber sealing rings, and the double-sided thread grooves are in screw fit with double-sided thread rings.

[0022] By adopting the above technical scheme, the first airtight cover body and the second airtight cover body can be connected and fixed to the two ends of the metal cylinder through the screw fit structure design between the double-sided thread grooves and the double-sided thread rings.

[0023] Optionally, the mechanical transmission frame includes a support frame plate, which is hingedly connected to the hinge plate at one end of the second airtight cover body. A locator is installed at one end of the support frame plate, and a transmission is movably connected to the middle part of the locator. The transmission is hingedly connected to the hinge plate at one end of the piston rod.

[0024] By adopting the above technical solution, the mechanical transmission frame in this solution is composed of a support frame plate, a positioner and a transmission. Since the support frame plate and the hinged plate at one end of the second airtight cover body are hingedly connected, and the transmission and the hinged plate at one end of the piston rod are hingedly connected, the pneumatic support assembly can be movably connected to the two ends of the mechanical transmission frame.

[0025] In summary, the present invention has at least one of the following beneficial effects:

[0026] 1. This solution uses double-sided threaded rings installed at both ends of the metal cylinder, and double-sided threaded grooves opened around one side of the second airtight cover and the first airtight cover. Since the double-sided threaded grooves match the double-sided threaded ring structure, and the double-sided threaded grooves and the double-sided threaded rings are threaded, the first airtight cover and the second airtight cover can be connected and fixed to the two ends of the metal cylinder. The elastic seal is installed at the connection between the first airtight cover, the second airtight cover and the metal cylinder. The elastic seal consists of a rubber sealing ring and an annular rubber plate, and the double-sided threaded grooves and the rubber The sealing rings are transitionally matched, which can improve the air tightness of the connection between the double-sided threaded ring and the double-sided threaded groove. By adding several sets of compression springs between the annular baffle and the telescopic adjustment groove, the elasticity between the two sets of rubber sealing rings and the annular rubber plate can also be improved, so that the elastic seal can adaptively telescope and adjust according to the size of the connection gap between the double-sided threaded groove and the rubber sealing ring, and can effectively fill the tiny gap between the double-sided threaded groove and the rubber sealing ring, thereby effectively improving the air tightness of the connection between the metal cylinder and the first airtight cover body and the second airtight cover body.

[0027] 2. When the metal cylinder encounters a serious collision during use, multiple groups of isolation cavities are opened around the inside of the metal cylinder. The isolation cavity can prevent the metal cylinder from leaking and spraying out the internal high-pressure gas due to penetration of the body during the collision. Combined with the reinforcing ribs installed inside the isolation cavity, it can also support the inner and outer layers of the metal cylinder that has been bumped, which can effectively improve the supporting strength of the metal cylinder during use and avoid the problem of deformation of the metal cylinder due to serious collision or sudden increase in air pressure during use, thereby improving the safety performance of the gas pressure rod during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the disassembly of the pneumatic support assembly of the present utility model;

[0031] Figure 3 This is a schematic diagram of the elastic sealing structure of the utility model;

[0032] Figure 4 This is a schematic diagram of the internal plane of the elastic seal of the utility model;

[0033] Figure 5 This is a cross-sectional view of the metal cylinder of the present utility model;

[0034] Figure 6 This is a schematic diagram of the first airtight cover structure of the present utility model;

[0035] Figure 7 This is a schematic structural diagram of the second airtight cover of the present invention;

[0036] Figure 8 This is a structural schematic diagram of the mechanical transmission frame of the present utility model.

[0037] Description of reference numerals:

[0038] 1. Mechanical transmission frame;

[0039] 11. Support frame; 12. Positioner; 13. Transmitter;

[0040] 2. Air pressure support assembly;

[0041] 3. Sealing guide cylinder;

[0042] 31. Metal cylinder; 311. Isolation cavity; 312. Reinforcement rib;

[0043] 32. Double-sided threaded ring;

[0044] 4. Upper end cover;

[0045] 41. First airtight cover;

[0046] 42. Support sleeve; 421. Piston rod; 422. Piston block;

[0047] 5. Lower end cover;

[0048] 51. Second airtight cover; 511. Air inlet; 512. Double-sided threaded groove;

[0049] 52. Hinge plate; 53. Air pressure delivery pipe;

[0050] 6. Elastic seals;

[0051] 61, rubber sealing ring; 611, telescopic adjustment slot; 621, annular baffle; 622, compression spring;

[0052] 62. Annular rubber sheet. DETAILED DESCRIPTION

[0053] The following is combined with Figures 1 to 8 The utility model is described in further detail.

[0054] Example 1, refer to Figures 1 to 4 The utility model discloses a pneumatic rod guide sleeve with a sealing structure.

[0055] The invention comprises a mechanical transmission frame 1, a pneumatic support assembly 2 is mounted on one side of the mechanical transmission frame 1, and the pneumatic support assembly 2 comprises a sealing guide cylinder 3, an upper end cover 4 is mounted on one end of the sealing guide cylinder 3, a lower end cover 5 is mounted on the end of the sealing guide cylinder 3 away from the upper end cover 4, and elastic sealing members 6 are respectively disposed between the connection points of the lower end cover 5, the upper end cover 4 and the sealing guide cylinder 3;

[0056] The elastic sealing member 6 includes a rubber sealing ring 61, and an annular rubber plate 62 is connected between one side of the two sets of rubber sealing rings 61;

[0057] The inner sides of the two sets of rubber sealing rings 61 are provided with telescopic adjustment grooves 611, and both sides of the annular rubber plate 62 are provided with annular baffles 621. The annular baffles 621 match the structure of the telescopic adjustment grooves 611, and several sets of compression springs 622 are connected between the annular baffles 621 and the telescopic adjustment grooves 611.

[0058] This solution uses double-sided threaded rings 32 installed at both ends of the metal cylinder 31, and double-sided threaded grooves 512 opened around one side of the second airtight cover 51 and the first airtight cover 41, to fix the first airtight cover 41 and the second airtight cover 51 to the two ends of the metal cylinder 31 by threaded cooperation. The installed elastic seal 6, composed of a rubber sealing ring 61 and an annular rubber plate 62, ensures the airtightness of the threaded connection. Through the action of the compression spring 622 between the annular baffle 621 and the telescopic adjustment groove 611, the elastic seal 6 can adaptively fill the gap between the double-sided threaded groove 512 and the rubber sealing ring 61, thereby improving the sealing effect. When the metal cylinder 31 is bumped, the internal isolation cavity 311 and the reinforcement ribs 312 can effectively prevent the leakage of high-pressure gas and increase the support strength, thereby improving safety performance and avoiding deformation caused by bumps or sudden increases in air pressure.

[0059] The sealing guide cylinder 3 includes a metal cylinder 31, and double-sided threaded rings 32 are respectively installed at both ends of the metal cylinder 31. The role of the sealing guide cylinder 3 in the patent is mainly reflected in improving the overall air tightness and connection stability of the pneumatic rod through the metal cylinder 31 and the double-sided threaded rings 32 installed at both ends. By adding double-sided threaded rings 32 at both ends of the metal cylinder 31, a firm threaded connection can be formed with the double-sided threaded grooves 512 of the first airtight cover body 41 and the second airtight cover body 51, ensuring that the pneumatic rod does not loosen when subjected to air pressure. Combined with the threaded matching design, the connection between the two end covers and the metal cylinder 31 is more stable, further improving the sealing performance of the equipment and effectively preventing high-pressure gas leakage.

[0060] Example 2, refer to Figures 5 and 6 In this embodiment, in order to solve the problem of insufficient airtightness due to the lack of a sealing auxiliary structure between the sealing cylinder and the end cover, and the problem of gas leakage when the sealing cylinder is bumped during use, based on the same concept as the above-mentioned embodiment 1, the pneumatic rod guide sleeve with a sealing structure also includes:

[0061] There are multiple groups of isolation cavities 311 around the interior of the metal cylinder 31, and reinforcing ribs 312 are also provided inside the isolation cavities 311. The multiple groups of isolation cavities 311 opened inside the metal cylinder 31 and the reinforcing ribs 312 provided inside the isolation cavities 311 play a key protective role in the patent. The design of the isolation cavity 311 can effectively buffer external impacts, reduce damage caused by bumps during use, and prevent the metal cylinder 31 from deformation or penetration, thereby reducing the risk of high-pressure gas leakage. The design of the reinforcing ribs 312 further enhances the structural strength of the metal cylinder 31, improves the overall supporting capacity, and ensures that the gas pressure rod can still maintain stability when subjected to external forces.

[0062] The upper end cover 4 includes a first airtight cover body 41, and a supporting sleeve 42 is installed on the top of the first airtight cover body 41. The upper end cover 4 ensures the airtightness of the telescopic adjustment of the top components of the pneumatic rod through the first airtight cover body 41 and the supporting sleeve 42 installed on the top, prevents high-pressure gas leakage, and provides a closed environment for the internal components to maintain a stable working state.

[0063] The supporting sleeve 42 and the middle part of the first airtight cover body 41 are slidably connected with a piston rod 421. There is a transition fit between the piston rod 421, the supporting sleeve 42 and the first airtight cover body 41. A piston block 422 is also provided at one end of the piston rod 421. There is a transition fit between the piston block 422 and the metal cylinder 31. The sliding connection between the supporting sleeve 42 and the middle part of the first airtight cover body 41 is realized through the piston rod 421. The piston rod 421 serves as a key component for transmission and support, and the transition fit between the supporting sleeve 42 and the first airtight cover body 41 ensures the stability and flexibility of the piston body during movement.

[0064] Example 3, refer to Figures 6 to 8 In this embodiment, in order to solve the problem of insufficient airtightness due to the lack of a sealing auxiliary structure between the sealing cylinder and the end cover, and the problem of gas leakage when the sealing cylinder is bumped during use, based on the same concept as the above-mentioned embodiment 1, the pneumatic rod guide sleeve with a sealing structure also includes:

[0065] The lower end cover 5 includes a second airtight cover body 51, and a hinged plate 52 is installed on one end of the second airtight cover body 51 and the piston rod 421. A pneumatic delivery pipe 53 is also connected to one side of the second airtight cover body 51. By installing the hinged plates 52 on one end of the second airtight cover body 51 and the piston rod 421 respectively, the pneumatic support assembly 2 can be movably connected to the two ends of the mechanical transmission frame 1.

[0066] An air inlet 511 is provided in the middle of one side of the second airtight cover body 51 away from the hinged plate 52, and double-sided threaded grooves 512 are also provided around one side of the second airtight cover body 51 and the first airtight cover body 41. The double-sided threaded groove 512 and the rubber sealing ring 61 are in transitional fit, and the double-sided threaded groove 512 and the double-sided threaded ring 32 are in threaded fit. Through the structural design of the threaded fit between the double-sided threaded groove 512 and the double-sided threaded ring 32, the first airtight cover body 41 and the second airtight cover body 51 can be connected and fixed at both ends of the metal cylinder 31.

[0067] The mechanical transmission frame 1 includes a support frame plate 11, which is hingedly connected to the hinged plate 52 at one end of the second airtight cover body 51. A positioner 12 is installed at one end of the support frame plate 11, and a transmission 13 is movably connected to the middle part of the positioner 12. The transmission 13 is hingedly connected to the hinged plate 52 at one end of the piston rod 421. The mechanical transmission frame 1 is composed of a support frame plate 11, a positioner 12 and a transmission 13. Since the support frame plate 11 is hingedly connected to the hinged plate 52 at one end of the second airtight cover body 51, and the transmission 13 is hingedly connected to the hinged plate 52 at one end of the piston rod 421, the pneumatic support assembly 2 can be movably connected to the two ends of the mechanical transmission frame 1.

[0068] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic rod guide sleeve with a sealing structure, comprising a mechanical transmission frame (1), characterized in that: A pneumatic support assembly (2) is installed on one side of the mechanical transmission frame (1), and the pneumatic support assembly (2) includes a sealing guide cylinder (3), an upper end cover (4) is installed at one end of the sealing guide cylinder (3), a lower end cover (5) is provided at the end of the sealing guide cylinder (3) away from the upper end cover (4), and elastic sealing members (6) are respectively provided between the connection points of the lower end cover (5), the upper end cover (4) and the sealing guide cylinder (3); The elastic sealing member (6) comprises a rubber sealing ring (61), and an annular rubber plate (62) is connected between one side of two groups of the rubber sealing rings (61); The inner sides of the two groups of rubber sealing rings (61) are both provided with telescopic adjustment grooves (611), and both sides of the annular rubber plate (62) are provided with annular baffles (621), the annular baffles (621) and the telescopic adjustment grooves (611) are structurally matched, and a plurality of groups of compression springs (622) are further connected between the annular baffles (621) and the telescopic adjustment grooves (611).

2. The pneumatic rod guide sleeve with a sealing structure according to claim 1, characterized in that: The sealing guide cylinder (3) comprises a metal cylinder (31), and double-sided threaded rings (32) are respectively installed at both ends of the metal cylinder (31).

3. The pneumatic rod guide sleeve with a sealing structure according to claim 2, characterized in that: A plurality of isolation cavities (311) are provided around the interior of the metal cylinder (31), and reinforcing ribs (312) are also provided inside the isolation cavities (311).

4. The pneumatic rod guide sleeve with a sealing structure according to claim 3, characterized in that: The upper end cover (4) comprises a first airtight cover body (41), and a supporting sleeve (42) is installed on the top of the first airtight cover body (41).

5. The pneumatic rod guide sleeve with a sealing structure according to claim 4, characterized in that: The support sleeve (42) and the middle part of the first airtight cover (41) are slidably connected with a piston rod (421), and a transition fit is formed between the piston rod (421), the support sleeve (42), and the first airtight cover (41). A piston block (422) is further provided at one end of the piston rod (421), and a transition fit is formed between the piston block (422) and the metal cylinder (31).

6. The pneumatic rod guide sleeve with a sealing structure according to claim 1, characterized in that: The lower end cover (5) includes a second airtight cover body (51), and one end of the second airtight cover body (51) and the piston rod (421) are both installed with a hinge plate (52), and one side of the second airtight cover body (51) is also connected to an air pressure delivery pipe (53).

7. The pneumatic rod guide sleeve with a sealing structure according to claim 6, characterized in that: An air inlet (511) is provided in the middle of one side of the second airtight cover body (51) away from the hinge plate (52), and double-sided thread grooves (512) are also provided around one side of the second airtight cover body (51) and the first airtight cover body (41). The double-sided thread grooves (512) and the rubber sealing ring (61) are in transitional fit, and the double-sided thread grooves (512) and the double-sided thread ring (32) are in threaded fit.

8. The pneumatic rod guide sleeve with a sealing structure according to claim 1, characterized in that: The mechanical transmission frame (1) includes a support frame plate (11), the support frame plate (11) and the hinge plate (52) at one end of the second airtight cover (51) are hingedly connected, a positioner (12) is installed at one end of the support frame plate (11), and a transmission (13) is movably connected to the middle part of the positioner (12), and the transmission (13) and the hinge plate (52) at one end of the piston rod (421) are hingedly connected.

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