Double-piston gas spring

Abstract

The utility model discloses a double-piston gas spring, and relates to the technical field of double-piston gas springs. Comprising an air cylinder body, an annular support is clamped in a mounting ring, then a mounting plate is attached to the side wall of the mounting ring and locked through a bolt, cleaning cotton on the inner wall of the annular support is attached to the outer wall of a telescopic rod and used for cleaning when the telescopic rod and the air cylinder body slide in a telescopic mode, and the cleaning cotton slides along with telescopic sliding of the telescopic rod. Cleaning cotton can effectively wipe dust and impurities on the outer wall of the telescopic rod, the dust and the impurities are prevented from entering the air cylinder, the internal structure and functions of the air cylinder body are protected, the service life of the air spring is prolonged, meanwhile, a mounting ring and the air cylinder body can move through an annular groove, a sliding block and a connecting shaft, and the mounting ring is manually rotated; the cleaning effect of the cleaning cotton on the outer wall of the telescopic rod is ensured, the annular support can be detached and separated from the mounting ring through bolts, and the cleaning cotton can be detached and cleaned conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of double-piston gas springs, in particular to a double-piston gas spring. Background Art

[0002] As a key component widely used in furniture, automobiles, medical equipment and other fields, the performance stability and service life of gas springs are directly related to the overall quality of the product and user experience.

[0003] The reference patent (publication number: CN214742958U; publication date: 2021-11-16) discloses a double-piston gas spring in the field of gas springs, including a cylinder body, a piston rod installed at the lower end of the cylinder body, the piston rod and the cylinder body are slidably connected, a bottom plate is installed at the lower end of the piston rod, and a lower sliding plate is installed at the upper end of the piston rod. Pistons are installed on the left and right sides of the upper end of the lower sliding plate, and the upper end of the piston is connected to the upper sliding plate. The upper front end of the cylinder body is connected to the air intake pipe, and the inner end of the air intake pipe is connected to the cylinder body; the spring performs elastic movement, and the fixed plate squeezes the piston rod to prevent leakage of gas inside the cylinder body, does not affect the operation of the device, and brings convenience; by unscrewing the locking bolt, the connecting plate is opened, and the inside of the cylinder body is cleaned to avoid dust pollution inside, does not affect the operation of the device, and improves the service life of the device.

[0004] Two sets of piston rods are set inside the double-piston gas spring, which are respectively connected to the telescopic rod and the inner wall of the cylinder to ensure stability during extension and contraction. The double-piston gas spring is filled with high-pressure inert gas or oil-gas mixture in a closed pressure cylinder, and uses the pressure difference generated by the difference in cross-sectional area between the piston seat and the piston to push the telescopic rod to move.

[0005] Based on the above patent, when the existing double-piston gas spring is used in the later stage, after the telescopic rod slides outward from the inside of the cylinder, the outer wall of the telescopic rod is generally directly exposed to the outside of the air. Therefore, dust in the air often adheres to the outer wall of the telescopic rod, causing dust accumulation. As the dust accumulates, when the telescopic rod is retracted in the later stage, dust can easily enter the interior of the equipment, causing damage to the cylinder body, making it inconvenient to clean. In addition, when the piston seat of the double-piston gas spring is compressed and slides inside the cylinder body, it will come into direct contact with the inner wall of the cylinder, generating a large collision force and friction. The direct metal collision will not only cause damage to the inner wall of the cylinder, but also accelerate the wear of the piston seat and the cylinder body. For this reason, the present invention provides a double-piston gas spring. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention provides a double-piston gas spring, which solves the problem that in the existing double-piston gas spring, when the telescopic rod slides outward from the inside of the cylinder, the outer wall of the telescopic rod is generally directly exposed to the air. Therefore, dust in the air often adheres to the outer wall of the telescopic rod and causes dust accumulation. As the dust accumulates, when the telescopic rod is later contracted, the dust easily enters the interior of the equipment, causing damage to the cylinder body, making it inconvenient to clean. In addition, when the piston seat of the double-piston gas spring is compressed and slides inside the cylinder body, it will come into direct contact with the inner wall of the cylinder, generating a large collision force and friction. The direct metal collision will not only cause damage to the inner wall of the cylinder, but also accelerate the wear of the piston seat and the cylinder body.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A double-piston gas spring includes a cylinder body, on which a telescopic mechanism for the double-piston gas spring is provided, the telescopic mechanism including:

[0008] The buffer assembly includes a cavity formed inside the cylinder body, an inner wall of the cavity being provided with a piston seat connected via a piston assembly, a side wall of the piston seat being fixedly connected to a damping spring, an end of the damping spring being fixedly connected to a limit plate, and a telescopic rod being slidably connected to the interior of the cavity;

[0009] The cleaning component includes a mounting ring connected by a movable component at the telescopic end interface of the cylinder body, an annular bracket is connected to the inside of the mounting ring, and the inner wall of the annular bracket is evenly distributed with cleaning cotton located on the outer wall of the telescopic rod.

[0010] Preferably, a first rubber ring is fixedly connected to the side wall of the limiting plate, and one end of the telescopic rod passes through the interior of the first rubber ring and is fixedly connected to the limiting plate.

[0011] Preferably, a damping rod is provided inside the shock-absorbing spring, one end of the damping rod is fixedly connected to the piston seat, and a second rubber ring is fixedly connected to the edge of the outer wall of the piston seat.

[0012] Preferably, the piston assembly comprises two piston rods fixedly connected to the inner wall of the cavity, and the telescopic ends of the piston rods are fixedly connected to the piston seat.

[0013] Preferably, the movable component includes an annular groove opened inside the mounting ring, a slider is slidably connected inside the annular groove, the side wall of the slider is movably connected to a connecting shaft, the other end of the connecting shaft is rotatably connected to the side wall of the cylinder body, and the mounting ring forms a rotating structure with the cylinder body through the annular groove, the slider and the connecting shaft.

[0014] Preferably, a mounting plate is fixedly connected to the edge of the annular bracket, the mounting plate is attached to the side wall of the mounting ring, bolts are provided inside the mounting plate, and an air inlet for air intake is provided outside the cylinder body.

[0015] Beneficial effects

[0016] The utility model provides a double-piston gas spring. Compared with the prior art, it has the following advantages:

[0017] First, the utility model engages the annular bracket inside the mounting ring, and then the mounting plate is fitted on the side wall of the mounting ring and locked by bolts. The cleaning cotton on the inner wall of the annular bracket is fitted on the outer wall of the telescopic rod and is used for cleaning when the telescopic rod and the cylinder body are telescopically slid. As the telescopic rod is telescopically slid, the cleaning cotton can effectively wipe off the dust and impurities on the outer wall of the telescopic rod to avoid entering the interior of the cylinder, thereby protecting the internal structure and function of the cylinder body and extending the service life of the gas spring. At the same time, the mounting ring is movable with the cylinder body through the annular groove, the slider and the connecting shaft, and is used to manually rotate the mounting ring to ensure the cleaning effect of the cleaning cotton on the outer wall of the telescopic rod, and the annular bracket can be disassembled and separated from the mounting ring by bolts, which is convenient for disassembly and cleaning of the cleaning cotton.

[0018] Secondly, the limit plate provided in the present invention performs shock absorption and buffering on the piston seat through the shock-absorbing spring and the damping support rod. When the piston seat is compressed and slides inside the cylinder body, it buffers when it contacts the inner wall of the cylinder body, absorbs part of the impact energy, and reduces the collision force when the piston seat contacts the inner wall of the cylinder body, thereby protecting the inner wall of the cylinder from damage and extending the service life of the gas spring. At the same time, the first rubber ring on the limit plate and the cylinder body perform contact buffering. The soft material of the rubber ring can effectively reduce the direct friction between metal parts, thereby reducing wear and extending the service life of the gas spring, and ensuring close contact between the telescopic rod and the cylinder body to prevent gas leakage or external impurities from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic cross-sectional structural diagram of the cylinder body of the present utility model;

[0021] Figure 3 This is an enlarged structural diagram of point A of the present utility model;

[0022] Figure 4 This is an enlarged structural diagram of point B of the present utility model;

[0023] Figure 5This is a schematic diagram of the connection structure between the mounting ring and the slider of the utility model;

[0024] Figure 6 This is a schematic diagram of the mounting ring structure of the present utility model.

[0025] In the figure: 1. Cylinder body; 2. Telescopic rod; 201. Cavity; 202. Piston rod; 203. Piston seat; 4. Shock-absorbing spring; 401. Damping support rod; 402. Limiting plate; 403. First rubber ring; 5. Second rubber ring; 6. Mounting ring; 601. Annular groove; 602. Slider; 603. Connecting shaft; 7. Annular bracket; 701. Mounting plate; 702. Bolt; 703. Cleaning cotton; 8. Air inlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1-6 The utility model provides a technical solution: a double-piston gas spring, comprising a cylinder body 1, on which a telescopic mechanism for the double-piston gas spring is provided, the telescopic mechanism comprising:

[0028] The buffer assembly includes a cavity 201 defined within the cylinder body 1. The inner wall of the cavity 201 is provided with a piston seat 203 connected via a piston assembly. A damping spring 4 is fixedly connected to the side wall of the piston seat 203. The end of the damping spring 4 is fixedly connected to a limit plate 402. The interior of the cavity 201 is slidably connected to a telescopic rod 2.

[0029] The cleaning assembly includes a mounting ring 6 connected by a movable assembly at the telescopic end interface of the cylinder body 1, an annular bracket 7 is connected to the inside of the mounting ring 6, and the inner wall of the annular bracket 7 is evenly distributed with cleaning cotton 703 located on the outer wall of the telescopic rod 2.

[0030] In a preferred embodiment, a first rubber ring 403 is fixedly connected to the side wall of the limiting plate 402, one end of the telescopic rod 2 passes through the interior of the first rubber ring 403 and is fixedly connected to the limiting plate 402, and the set telescopic rod 2 passes through the first rubber ring 403 and is fixedly connected to the limiting plate 402. When the piston seat 203 pushes the telescopic rod 2 and the cylinder body 1 to telescopically slide, the first rubber ring 403 on the limiting plate 402 and the cylinder body 1 perform contact buffering. The soft material of the rubber ring can effectively reduce the direct friction between the metal parts, thereby reducing wear and extending the service life of the gas spring, and ensuring close contact between the telescopic rod 2 and the cylinder body 1 to prevent gas leakage or external impurities from entering.

[0031] In a preferred embodiment, a damping rod 401 is provided inside the shock-absorbing spring 4, one end of the damping rod 401 is fixedly connected to the piston seat 203, and a second rubber ring 5 is fixedly connected to the edge of the outer wall of the piston seat 203 to improve the sealing of the piston seat 203 during sliding. The set limit plate 402 performs shock-absorbing and buffering on the piston seat 203 through the shock-absorbing spring 4 and the damping rod 401. When the piston seat 203 is compressed and slides inside the cylinder body 1, it buffers when it contacts the inner wall of the cylinder body 1, absorbs part of the impact energy, and reduces the collision force when the piston seat 203 contacts the inner wall of the cylinder body 1, thereby protecting the inner wall of the cylinder from damage and extending the service life of the gas spring.

[0032] In a preferred embodiment, the piston assembly includes two piston rods 202 on both sides fixedly connected to the inner wall of the cavity chamber 201, and the telescopic end of the piston rod 202 is fixedly connected to the piston seat 203. An air inlet 8 for air intake is provided on the outside of the cylinder body 1. Inert gas is injected into the air inlet 8 to ensure that there is sufficient inert gas inside the cylinder body, so that the device can operate normally, push the piston seat 203, and then the piston seat 203 slides inside the cylinder body 1 through the telescopic movement of the two sets of piston rods 202, thereby improving its stability and reliability.

[0033] In a preferred embodiment, the movable component includes an annular groove 601 opened inside the mounting ring 6, and a slider 602 is slidably connected inside the annular groove 601. The side wall of the slider 602 is movably connected to a connecting shaft 603, and the other end of the connecting shaft 603 is rotatably connected to the side wall of the cylinder body 1. The mounting ring 6 forms a rotating structure with the cylinder body 1 through the annular groove 601, the slider 602 and the connecting shaft 603. The edge of the annular bracket 7 is fixedly connected with a mounting plate 701, and the mounting plate 701 is attached to the side wall of the mounting ring 6. Bolts 702 are provided inside the mounting plate 701, and the annular bracket 7 is clamped inside the mounting ring 6. Then the mounting plate 701 is attached to the side wall of the mounting ring 6 and locked by the bolts 702. The cleaning cotton 703 on the inner wall of the annular bracket 7 is attached to the outer wall of the telescopic rod 2 and is used for cleaning when the telescopic rod 2 and the cylinder body 1 are telescopically slid. As the telescopic rod 2 is telescopically slid, the cleaning cotton 703 can effectively wipe off the dust and impurities on the outer wall of the telescopic rod 2 to prevent them from entering the interior of the cylinder, thereby protecting the internal structure and function of the cylinder body 1 and extending the service life of the gas spring. At the same time, the mounting ring 6 is movable with the cylinder body 1 through the annular groove 601, the slider 602 and the connecting shaft 603, and is used to manually rotate the mounting ring 6 to ensure the cleaning effect of the cleaning cotton 703 on the outer wall of the telescopic rod 2, and the annular bracket 7 can be disassembled and separated from the mounting ring 6 by the bolt 702, which is convenient for disassembly and cleaning of the cleaning cotton 703.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] During operation, inert gas is injected into the air inlet 8 to ensure that there is sufficient inert gas inside the cylinder body, so that the device can operate normally, push the piston seat 203 to push, and then the piston seat 203 slides inside the cylinder body 1 through the extension and contraction of the two sets of piston rods 202, and then the limit plate 402 is provided on the piston seat 203 to perform shock absorption and buffering through the shock-absorbing spring 4 and the damping support rod 401. When the piston seat 203 is compressed and slides inside the cylinder body 1, it is buffered when it contacts the inner wall of the cylinder body 1. At the same time, when the piston seat 203 pushes the telescopic rod 2 and the cylinder body 1 to extend and slide, the first rubber ring 403 on the limit plate 402 contacts the cylinder body 1 for buffering. The soft material of the rubber ring can effectively reduce the direct friction between the metal parts, thereby reducing wear and extending the service life of the gas spring.

[0036] The annular bracket 7 is engaged with the inside of the mounting ring 6, and then the mounting plate 701 is fitted on the side wall of the mounting ring 6 and locked by the bolt 702. The cleaning cotton 703 on the inner wall of the annular bracket 7 is fitted on the outer wall of the telescopic rod 2, and is used for cleaning when the telescopic rod 2 and the cylinder body 1 are telescopically slid. As the telescopic rod 2 is telescopically slid, the cleaning cotton 703 can effectively wipe off the dust and impurities on the outer wall of the telescopic rod 2 to prevent them from entering the interior of the cylinder, thereby protecting the internal structure and function of the cylinder body 1 and extending the service life of the gas spring. At the same time, the mounting ring 6 is movable with the cylinder body 1 through the annular groove 601, the slider 602 and the connecting shaft 603, and is used to manually rotate the mounting ring 6 to ensure the cleaning effect of the cleaning cotton 703 on the outer wall of the telescopic rod 2, and the annular bracket 7 can be disassembled and separated from the mounting ring 6 by the bolt 702, which is convenient for disassembly and cleaning of the cleaning cotton 703.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-piston gas spring, comprising a cylinder body (1), characterized in that: The cylinder body (1) is provided with a telescopic mechanism for a double-piston gas spring, the telescopic mechanism comprising: A buffer assembly comprises a cavity (201) provided inside a cylinder body (1); an inner wall of the cavity (201) is provided with a piston seat (203) connected via a piston assembly; a side wall of the piston seat (203) is fixedly connected to a damping spring (4); an end of the damping spring (4) is fixedly connected to a limiting plate (402); and a telescopic rod (2) is slidably connected inside the cavity (201); The cleaning assembly comprises a mounting ring (6) connected via a movable assembly at the telescopic end interface of a cylinder body (1), an annular bracket (7) being snap-connected inside the mounting ring (6), and cleaning cotton (703) located on the outer wall of the telescopic rod (2) being evenly distributed on the inner wall of the annular bracket (7).

2. A double-piston gas spring according to claim 1, characterized in that: The side wall of the limiting plate (402) is fixedly connected to a first rubber ring (403), and one end of the telescopic rod (2) passes through the interior of the first rubber ring (403) and is fixedly connected to the limiting plate (402).

3. The double-piston gas spring according to claim 1, characterized in that: A damping support rod (401) is provided inside the shock absorbing spring (4), one end of the damping support rod (401) is fixedly connected to the piston seat (203), and a second rubber ring (5) is fixedly connected to the outer wall edge of the piston seat (203).

4. The double-piston gas spring according to claim 1, characterized in that: The piston assembly comprises two piston rods (202) fixedly connected to the inner wall of the cavity (201), and the telescopic ends of the piston rods (202) are fixedly connected to the piston seat (203).

5. The double-piston gas spring according to claim 1, characterized in that: The movable assembly includes an annular groove (601) provided inside the mounting ring (6), a slider (602) being slidably connected inside the annular groove (601), a connecting shaft (603) being movably connected to the side wall of the slider (602), and the other end of the connecting shaft (603) being rotatably connected to the side wall of the cylinder body (1). The mounting ring (6) forms a rotating structure with the cylinder body (1) through the annular groove (601), the slider (602) and the connecting shaft (603).

6. The double-piston gas spring according to claim 1, characterized in that: A mounting plate (701) is fixedly connected to the edge of the annular bracket (7), and the mounting plate (701) is attached to the side wall of the mounting ring (6). Bolts (702) are provided inside the mounting plate (701), and an air inlet (8) for air intake is provided outside the cylinder body (1).

Images