Double-rod gas spring

Abstract

The utility model relates to the technical field of gas springs, in particular to a double-rod gas spring. In order to solve the problems that as piston rods at the two ends of an air spring frequently stretch out and draw back in a reciprocating mode, dust and impurities in air easily enter the interior along gaps between the piston rods and a cylinder body, abrasion is aggravated, the sealing performance is reduced, gas leakage is caused, and the working performance and the service life are affected, the following technical scheme is provided: the air spring comprises a hollow pressure cylinder; a partition plate is fixedly connected into the pressure cylinder; the two sets of telescopic rods are slidably connected to the two ends of the pressure cylinder correspondingly, pistons are fixedly connected to the opposite ends of the two sets of telescopic rods, and the two sets of pistons are slidably connected into the pressure cylinder; the sealing rings are fixedly arranged on the inner walls of the two ends of the pressure cylinder, and the telescopic rods are arranged in the sealing rings in a penetrating mode. Abrasion can be reduced, sealing performance can be maintained, working stability of the gas spring is improved, service life is prolonged, maintenance is convenient, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas spring technology, and in particular to a double-rod gas spring. Background Technology

[0002] In the field of machinery and various equipment, gas springs, as an important elastic element, are widely used in many scenarios due to their unique performance advantages, such as good cushioning, support and adjustment functions, covering many aspects from automobile hood support and office furniture seat adjustment to the automation control of industrial equipment.

[0003] As an important type of gas spring, the double-rod gas spring's structural characteristics give it more stable support and motion characteristics compared to the single-rod gas spring. However, in actual use, the double-rod gas spring has revealed a prominent problem. Because the piston rods at both ends of the double-rod gas spring need to frequently reciprocate during operation, this characteristic leaves both ends of the gas spring in a relatively open state. In most working environments, various dust and fine particulate impurities are often suspended in the air. With the continuous extension and retraction of the piston rods, these dust and impurities can easily enter the gas spring through the gap between the piston rod and the gas spring cylinder. Once dust enters the gas spring, it will have many adverse effects on its internal precision structure and operating mechanism. Dust particles may accelerate the wear between the piston rod and the seals, leading to a decrease in sealing performance and subsequent gas leakage. This not only reduces the gas spring's performance and shortens its service life, but in severe cases, it may even cause the entire equipment to malfunction, affecting the normal operation and efficiency of the equipment, and increasing maintenance costs and downtime. Therefore, this utility model proposes a double-rod gas spring. Utility Model Content

[0004] The purpose of this invention is to address the problem in the prior art where the frequent reciprocating extension and retraction of the piston rods at both ends of a gas spring causes dust and impurities in the air to easily enter the interior through the gap between the piston rod and the cylinder, thereby aggravating wear, reducing sealing performance, causing gas leakage, and affecting working performance and lifespan. This invention proposes a double-rod gas spring.

[0005] The technical solution of this utility model is as follows: A double-rod gas spring includes a hollow pressure cylinder with a partition plate fixedly connected inside; two sets of telescopic rods, each set slidably connected to one end of the pressure cylinder, and a piston fixedly connected to one end of each set of telescopic rods, with the pistons slidably connected inside the pressure cylinder; sealing rings fixedly disposed on the inner walls of both ends of the pressure cylinder, with the telescopic rods passing through the sealing rings; cleaning mechanisms disposed at both ends of the pressure cylinder for wiping the outer sides of the telescopic rods; fixing components installed at both ends of the pressure cylinder for fixing the position of the cleaning mechanisms; and a protective mechanism disposed outside the cleaning mechanisms and fixing components for protection.

[0006] Optionally, both ends of the pressure cylinder are fixedly connected to a fixing plate, and the fixing plate has multiple sets of mounting slots.

[0007] Optionally, the cleaning mechanism includes multiple sets of mounting plates, which are respectively installed in multiple sets of mounting slots. The mounting plates are L-shaped, and multiple sets of limiting rods are slidably connected to each set of mounting plates. A connecting plate is fixedly connected to one end of the multiple sets of limiting rods near the telescopic rod. An arc-shaped plate is installed on the side of the connecting plate near the telescopic rod, and a sponge block is provided on the side of the arc-shaped plate near the telescopic rod.

[0008] Optionally, a spring is fitted around the outer ring of the limiting rod, the spring being positioned between the mounting plate and the connecting plate, and the end of the multiple sets of limiting rods furthest from the connecting plate is fixedly connected to a limiting plate.

[0009] Optionally, the fixing component includes a first positioning ring fixedly connected to the side of the fixing plate away from the pressure cylinder. The first positioning ring is disposed on the outside of multiple sets of mounting plates. A ring plate is disposed on the inner side of the first positioning ring. A rotating ring is threadedly connected to the first positioning ring. The rotating ring has an L-shaped cross-section. A pressure ring is installed on the side of the rotating ring near the ring plate.

[0010] Optionally, the rotating ring is fixedly connected to a plurality of operating columns on the side away from the pressure cylinder, and the plurality of operating columns are arranged in a ring array.

[0011] Optionally, the protective mechanism includes a second positioning ring disposed outside the first positioning ring. The second positioning ring is fixedly connected to the fixed plate. An installation ring is threadedly connected to the outside of the second positioning ring. A first protective cover is fixedly connected to the side of the installation ring away from the fixed plate. The first protective cover is semi-circular. Two sets of sliding grooves are opened on the vertical surface of the first protective cover. A slider is slidably connected in the sliding groove. The two sets of sliders are fixedly connected to the second protective cover.

[0012] Optionally, the second protective cover has two sets of protrusions fixedly connected to the side of the first protective cover near the first protective cover. The first protective cover has grooves at the corresponding positions of the protrusions. A threaded rod is threaded through the protrusion and the threaded rod is threadedly connected to the first protective cover.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This invention utilizes a sponge block in the cleaning mechanism to wipe the surface of the telescopic rod as it slides, preventing dust from entering the pressure cylinder, reducing wear on the piston rod and seals, maintaining sealing performance, improving the working stability of the gas spring, and extending its service life.

[0015] Furthermore, with the addition of cleaning and protective mechanisms, when the sponge block needs to be cleaned or replaced, the corresponding protective and fixing components can be removed simply by unscrewing the threaded rod and rotating the relevant parts, which facilitates the maintenance of the sponge block and saves maintenance time and labor costs.

[0016] In summary, this invention can reduce wear, maintain sealing performance to improve the working stability of the gas spring and extend its service life, while also being easy to maintain and thus reducing maintenance costs. Attached Figure Description

[0017] Figure 1 A schematic diagram of a double-bar gas spring is provided.

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the protective mechanism.

[0021] Figure label:

[0022] 1. Pressure cylinder; 11. Partition plate; 12. Fixing plate; 13. Mounting groove;

[0023] 2. Telescopic rod; 3. Piston; 4. Sealing ring;

[0024] 5. Cleaning mechanism; 51. Mounting plate; 52. Limiting rod; 53. Connecting plate; 54. Arc plate; 55. Sponge block; 56. Spring; 57. Limiting plate;

[0025] 6. Fixing component; 61. First positioning ring; 62. Ring plate; 63. Rotating ring; 64. Pressure ring; 65. Operating column;

[0026] 7. Protective mechanism; 71. Second positioning ring; 72. Mounting ring; 73. First protective cover; 74. Slide groove; 75. Sliding block; 76. Second protective cover; 77. Protrusion; 78. Groove; 79. Threaded rod. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Example

[0033] like Figures 1 to 3As shown, this utility model proposes a double-rod gas spring, including a hollow pressure cylinder 1. A partition plate 11 is fixedly connected to the pressure cylinder 1, dividing the pressure cylinder 1 into two cavities to facilitate the compression of gas when the two sets of pistons 3 move. Fixed plates 12 are fixedly connected to both ends of the pressure cylinder 1, and the positions of the fixed plates 12 are fixed. Four sets of mounting slots 13 are provided on the fixed plates 12, which are used to position the mounting plates 51.

[0034] Furthermore, the gas spring includes two sets of telescopic rods 2, which are slidably connected to both ends of the pressure cylinder 1. Pistons 3 are fixedly connected to one end of each set of telescopic rods 2, and both sets of pistons 3 are slidably connected in the pressure cylinder 1. When the pistons 3 move, compressed air is used for buffering.

[0035] Furthermore, the gas spring also includes sealing rings 4 fixedly installed on the inner walls of both ends of the pressure cylinder 1, with the telescopic rod 2 passing through the sealing rings 4. The sealing rings 4 are used to improve the sealing performance of the telescopic rod 2 at the position where it passes through the pressure cylinder 1.

[0036] For details, please refer to Figure 3 and Figure 4 The aforementioned gas spring includes cleaning mechanisms 5 located at both ends of the pressure cylinder 1. These cleaning mechanisms 5 are used to wipe the outer side of the telescopic rod 2. The cleaning mechanism 5 includes four sets of mounting plates 51, each set installed in an L-shaped mounting groove 13. Two sets of limiting rods 52 are slidably connected to each mounting plate 51. A connecting plate 53 is fixedly connected to one end of each set of limiting rods 52 near the telescopic rod 2. The limiting action of the limiting rods 52 ensures smooth movement of the connecting plate 53. An arc-shaped plate 54 is installed on the side of the connecting plate 53 near the telescopic rod 2. A sponge block 55 is provided on the side of the arc-shaped plate 54 near the telescopic rod 2. The sponge block 55 wipes the surface of the telescopic rod 2 as it slides, preventing dust from entering the pressure cylinder 1. A spring 56 is fitted around the outer ring of the limiting rod 52. The spring 56 is positioned between the mounting plate 51 and the connecting plate 53. The spring 56 ensures that the sponge block 55 is tightly attached to the telescopic rod 2, guaranteeing a cleaning effect. A limiting plate 57 is fixedly connected to the end of the multiple limiting rods 52 furthest from the connecting plate 53. The limiting plate 57 prevents the limiting rods 52 from detaching from the mounting plate 51.

[0037] Furthermore, the aforementioned gas spring includes fixing components 6 installed at both ends of the pressure cylinder 1. The fixing components 6 are used to fix the position of the cleaning mechanism 5. The fixing components 6 include a first positioning ring 61 fixedly connected to the side of the fixing plate 12 away from the pressure cylinder 1. The first positioning ring 61 is disposed on the outer side of multiple sets of mounting plates 51, and an annular plate 62 is disposed on the inner side of the first positioning ring 61. The annular plate 62 is used to press down on the four sets of mounting plates 51, so that one side of the mounting plate 51 is fixed in the mounting groove 13, ensuring the position of the mounting plate 51 is fixed. A rotating ring 63 is threadedly connected to the first positioning ring 61. The rotating ring 63 has an L-shaped cross-section. A pressure ring 64 is installed on the side of the rotating ring 63 near the annular plate 62. After the rotating ring 63 is threadedly connected to the first positioning ring 61, it drives the pressure ring 64 to press against the annular plate 62, thus fixing the position of the annular plate 62. Multiple sets of operating columns 65 are fixedly connected to the side of the rotating ring 63 away from the pressure cylinder 1. The multiple sets of operating columns 65 are distributed in a circular array, and the arrangement of the operating columns 65 facilitates the rotation of the rotating ring 63.

[0038] Furthermore, the aforementioned gas spring also includes a protective mechanism 7 disposed outside the cleaning mechanism 5 and the fixing component 6, which is used for protection. The protective mechanism 7 includes a second positioning ring 71 disposed outside the first positioning ring 61, the second positioning ring 71 being fixedly connected to the fixing plate 12, and the position of the second positioning ring 71 being fixed. A mounting ring 72 is threadedly connected to the outer side of the second positioning ring 71, and a first protective cover 73 is fixedly connected to the side of the mounting ring 72 away from the fixing plate 12. When the first protective cover 73 rotates, it drives the mounting ring 72 to rotate synchronously, and drives the mounting ring 72 to be threadedly connected to the second positioning ring 71. The first protective cover 73 is semi-circular, and two sets of sliding grooves 74 are opened on the vertical surface of the first protective cover 73. A slider 75 is slidably connected in the sliding grooves 74, and the two sets of sliders 75 are fixedly connected to the second protective cover 76. The sliding grooves 74 and the sliders 75 facilitate the installation of the second protective cover 76 onto the side of the first protective cover 73, and the first protective cover 73 and the second protective cover 76 protect the inner cleaning mechanism 5 and the fixing component 6. Two sets of protrusions 77 are fixedly connected to the side of the second protective cover 76 near the first protective cover 73. The first protective cover 73 has a groove 78 at the corresponding position of the protrusions 77. A threaded rod 79 is threaded through the protrusions 77 and is threadedly connected to the first protective cover 73. The first protective cover 73 and the second protective cover 76 are locked by the setting of the threaded rod 79 to ensure the protection of their inner components.

[0039] In this embodiment, when the telescopic rod 2 extends or retracts, the outer side of the telescopic rod 2 contacts the sponge block 55, ensuring that the outer side of the telescopic rod 2 entering the pressure cylinder 1 is free of dust and impurities. When the gas spring needs to be cleaned or replaced after a period of use, the two sets of threaded rods 79 are removed by rotating them with a screwdriver. The second protective cover 76 is pulled out to the side away from the pressure cylinder 1, and then the first protective cover 73 is rotated to drive the mounting ring 72 to rotate, removing the mounting ring 72 from the outside of the second positioning ring 71. Then, the rotating ring 63 is rotated by the operating column 65 to remove the rotating ring 63 from the outside of the first positioning ring 61, and then the ring plate 62 can be removed. Then, the four sets of mounting plates 51 can be removed, and the sponge block 55 can be cleaned or replaced. Then, the four sets of mounting plates 51 are installed into the four sets of mounting slots 13 respectively, the ring plate 62 is pressed against the side of the fixing plate 12 away from the pressure cylinder 1, and then the rotating ring 63 is rotated to the outside of the first positioning ring 61, so that the pressure ring 64 presses against one side of the ring plate 62, thereby fixing the position of the mounting plate 51. Finally, rotating the first protective cover 73 causes the mounting ring 72 to rotate and be threaded to the outside of the second positioning ring 71. Through the limiting effect of the sliding groove 74 and the slider 75, the second protective cover 76 is installed on one side of the first protective cover 73, and the first protective cover 73 and the second protective cover 76 are locked by the threaded rod 79.

[0040] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A dual rod gas spring characterized by, include: A hollow pressure cylinder (1) is provided, and a partition plate (11) is fixedly connected inside the pressure cylinder (1); Two sets of telescopic rods (2) are slidably connected to both ends of the pressure cylinder (1). Pistons (3) are fixedly connected to one end of each set of telescopic rods (2). Pistons (3) are slidably connected to the pressure cylinder (1). A sealing ring (4) is fixedly installed on the inner wall of both ends of the pressure cylinder (1), and the telescopic rod (2) passes through the sealing ring (4); The cleaning mechanism (5) is provided at both ends of the pressure cylinder (1) and is used to wipe the outside of the telescopic rod (2); The fixing components (6) installed at both ends of the pressure cylinder (1) are used to fix the position of the cleaning mechanism (5); A protective mechanism (7) is provided on the outside of the cleaning mechanism (5) and the fixing component (6), and the protective mechanism (7) is used for protection.

2. A double-rod gas spring according to claim 1, characterized in that, The pressure cylinder (1) is fixedly connected to both ends by a fixing plate (12), and the fixing plate (12) has multiple sets of mounting slots (13).

3. A double-rod gas spring according to claim 2, characterized in that, The cleaning mechanism (5) includes multiple sets of mounting plates (51), which are respectively installed in multiple sets of mounting slots (13). The mounting plates (51) are L-shaped. Multiple sets of limiting rods (52) are slidably connected in each set of mounting plates (51). A connecting plate (53) is fixedly connected to one end of the multiple sets of limiting rods (52) near the telescopic rod (2). An arc plate (54) is installed on the side of the connecting plate (53) near the telescopic rod (2). A sponge block (55) is provided on the side of the arc plate (54) near the telescopic rod (2).

4. A double-rod gas spring according to claim 3, characterized in that, A spring (56) is fitted around the outer ring of the limiting rod (52). The spring (56) is located between the mounting plate (51) and the connecting plate (53). The ends of the multiple sets of limiting rods (52) away from the connecting plate (53) are fixedly connected to the limiting plate (57).

5. A double-rod gas spring according to claim 4, characterized in that, The fixing component (6) includes a first positioning ring (61) fixedly connected to the side of the fixing plate (12) away from the pressure cylinder (1). The first positioning ring (61) is disposed on the outside of multiple sets of mounting plates (51). A ring plate (62) is disposed on the inner side of the first positioning ring (61). A rotating ring (63) is threadedly connected to the first positioning ring (61). The rotating ring (63) has an L-shaped cross-section. A pressure ring (64) is installed on the side of the rotating ring (63) near the ring plate (62).

6. A double-rod gas spring according to claim 5, characterized in that, The rotating ring (63) is fixedly connected to a plurality of operating columns (65) on the side away from the pressure cylinder (1), and the plurality of operating columns (65) are arranged in a ring array.

7. A double-rod gas spring according to claim 6, characterized in that, The protective mechanism (7) includes a second positioning ring (71) disposed outside the first positioning ring (61). The second positioning ring (71) is fixedly connected to the fixing plate (12). An installation ring (72) is threadedly connected to the outside of the second positioning ring (71). A first protective cover (73) is fixedly connected to the side of the installation ring (72) away from the fixing plate (12). The first protective cover (73) is semi-circular. Two sets of sliding grooves (74) are opened on the vertical surface of the first protective cover (73). A slider (75) is slidably connected in the sliding groove (74). The two sets of sliders (75) are fixedly connected to the second protective cover (76).

8. A double-rod gas spring according to claim 7, characterized in that, The second protective cover (76) has two sets of protrusions (77) fixedly connected to the side of the first protective cover (73). The first protective cover (73) has grooves (78) at the corresponding positions of the protrusions (77). A threaded rod (79) is threaded through the protrusion (77) and the threaded rod (79) is threadedly connected to the first protective cover (73).

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