Furniture gas spring with good sealing performance

Abstract

The utility model relates to the technical field of gas springs, in particular to a furniture gas spring with good sealing performance, which comprises a cylinder body and a piston rod, and the piston rod is movably inserted into the cylinder body. According to the telescopic rod, the first sealing structure is arranged, when the telescopic rod is used and the piston rod stretches out, the downward scraping plate can scrape the surface of the piston rod, meanwhile, the wear-resisting ring can improve the sealing performance of the telescopic rod in use, oil stains are not prone to being attached to the surface of the piston rod, the dust adhesion performance is reduced, and the service life of the telescopic rod is prolonged. When the piston rod retracts, the upward scraping plate can scrape the outer wall of the piston rod, then the dust attached to the outer wall of the piston rod can be prevented from influencing use between the piston rod and the sealing ring, the service life of the sealing ring is greatly prolonged, the sealing ring is prevented from being damaged by the dust, and the service life of the piston rod is prolonged. And the sealing ring can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of gas spring equipment, in particular to a furniture gas spring with good sealing performance. Background Art

[0002] Gas spring is an industrial accessory that can support, buffer, brake, adjust height and angle. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), cylinder control element and cylinder control element (referring to controllable gas spring) and joints. The principle is to fill the closed pressure cylinder with inert gas or oil-gas mixture, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure, and the cross-sectional area of ​​the piston rod is smaller than the cross-sectional area of ​​the piston to generate a pressure difference to achieve the movement of the piston rod. Due to the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow speed, small change in dynamic force (generally within 1:1.2), and easy control.

[0003] At present, in the furniture industry, gas springs are often used as switch support devices for furniture doors, which is very convenient and practical.

[0004] However, during the use of current gas springs, friction often occurs between the piston rod and the sealing ring during the process of telescopic movement. However, since part of the piston rod is exposed when the piston rod is extended, dust in the air is easily attached to the outer surface of the piston rod. When the piston rod retracts again, the dust increases the friction, which easily increases the wear of the sealing ring, greatly reducing the service life of the sealing ring and requiring frequent replacement. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a furniture gas spring with good sealing performance, so as to solve the technical problem that during the use of the current gas spring, friction often occurs between the piston rod and the sealing ring during the process of telescopic movement, but since part of the piston rod is exposed when the piston rod is extended, dust in the air is easy to adhere to the outer surface of the piston rod, and then when the piston rod is retracted again, the dust increases the friction, which easily increases the wear of the sealing ring, greatly reduces the service life of the sealing ring, and requires frequent replacement.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A furniture gas spring with good sealing performance comprises: a cylinder body and a piston rod, the piston rod is movably inserted into the interior of the cylinder body, a sealing structure 1 and a sealing structure 2 as well as an oil seal structure movably connected to the piston rod are arranged inside the top of the cylinder body, the sealing structure 1 comprises a wear-resistant ring, a feed hole 1, a collecting groove, a sealing ring, a scraper, a mounting ring, a collecting chamber, a connecting hole and a sealing plug, the collecting groove is threadedly mounted inside the sealing ring, the collecting chamber is fixedly mounted on the top of the sealing ring, a scraper is fixedly mounted on the inner wall of one side of the collecting chamber, the scraper adopts an arc plate design, and two groups are arranged in an upward and downward symmetrical orientation, the other ends of the scrapers are both in contact with the outer wall of the piston rod, the inner wall of the scraper is provided with a wear-resistant ring, and the wear-resistant ring is in contact with the outer wall of the piston rod, the sealing ring is in contact with the piston rod, a feed hole 1 is opened on the top of the collecting groove, a feed hole 2 is opened on the outer wall of one side of the collecting chamber, a connecting hole is opened at the bottom of the collecting chamber to communicate with the collecting groove, and a sealing plug is arranged inside the top wall of the collecting groove.

[0008] Furthermore, a cavity is opened inside the collecting chamber, and the interior of the collecting chamber adopts a hollow design.

[0009] Furthermore, the oil seal structure includes an oil seal bracket, a fastening ring, a dustproof end cover and a sealing bolt. The oil seal bracket is arranged inside the cylinder body, the dustproof end cover is threadedly installed on the top of the cylinder body, the sealing ring is threadedly installed inside the dustproof end cover, and the sealing bolt is threadedly inserted into the interior of the dustproof end cover and extends to the top wall of the oil seal bracket.

[0010] Furthermore, the fastening ring is movably sleeved inside a side wall of the oil seal bracket, and the oil seal bracket is in contact with an outer wall of the piston rod.

[0011] Furthermore, the second sealing structure comprises a sealing sleeve, an annular spring and a mounting sleeve. The mounting sleeve and the sealing sleeve are both embedded in the side wall of the cylinder body, an annular spring is arranged between the two, and the annular spring is movably sleeved on the outside of the sealing sleeve.

[0012] Furthermore, a sealing ring and a dust ring are embedded in the outside of the bottom end of the piston rod, a top plate is fixedly installed on the top end of the piston rod, a second lifting ring is fixedly installed on the top of the top plate, and a first lifting ring is fixedly installed on the bottom end of the cylinder body.

[0013] Beneficial effects of the utility model:

[0014] By providing a sealing structure, when in use, when the piston rod is extended, the scraper facing downward will scrape the surface of the piston rod, and at the same time the wear-resistant ring will improve the sealing performance of the telescopic rod, thereby making it difficult for oil stains to adhere to the surface of the piston rod, thereby reducing the adhesion of dust and avoiding a large amount of dust from adhering to the outer wall of the piston rod; when the piston rod is retracted, the scraper facing upward will scrape the outer wall of the piston rod, thereby preventing the dust attached to the outer wall of the piston rod from affecting the use between it and the sealing ring, greatly improving the service life of the sealing ring, preventing the sealing ring from being damaged by dust, and being beneficial to protecting the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a furniture gas spring with good sealing performance;

[0017] Figure 2 This is a schematic cross-sectional view of an embodiment of a furniture gas spring with good sealing performance;

[0018] Figure 3 A three-dimensional schematic diagram of an annular spring of an embodiment of a furniture gas spring with good sealing performance;

[0019] Figure 4 The present invention is a furniture gas spring embodiment with good sealing performance. Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 5 The present invention is a furniture gas spring embodiment with good sealing performance. Figure 2 The enlarged structural diagram at B in the middle. The markings in the figure are as follows: 1. Cylinder body; 2. Piston rod; 3. Sealing ring; 4. Dustproof ring; 5. Lifting ring 1; 6. Lifting ring 2; 7. Top plate; 8. Wear-resistant ring; 9. Feed hole 1; 10. Collecting trough; 11. Fastening ring; 12. Sealing ring; 13. Scraper; 14. Mounting ring; 15. Collecting chamber; 16. Connecting hole; 17. Sealing plug; 18. Sealing sleeve; 19. Dustproof end cover; 20. Sealing bolt; 21. Oil seal bracket; 22. Ring spring; 23. Mounting sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the attached embodiment of the utility model Figure 1-5, the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] See also Figure 1-5 As shown, a furniture gas spring with good sealing performance comprises: a cylinder body 1 and a piston rod 2, the piston rod 2 is movably inserted into the interior of the cylinder body 1, a sealing structure 1 and a sealing structure 2 as well as an oil seal structure movably connected to the piston rod 2 are arranged inside the top of the cylinder body 1, the sealing structure 1 comprises a wear-resistant ring 8, a feed hole 19, a collecting groove 10, a sealing ring 12, a scraper 13, a mounting ring 14, a collecting chamber 15, a connecting hole 16 and a sealing plug 17, the collecting groove 10 is threadedly mounted inside the sealing ring 12, the collecting chamber 15 is fixedly mounted on the top of the sealing ring 12, and a scraper 1 is fixedly mounted on the inner wall of one side of the collecting chamber 15 3. The scraper 13 is designed with an arc plate, and two groups are provided in an upward and downward symmetrical distribution. The other ends of the scrapers 13 are in contact with the outer wall of the piston rod 2. The inner wall of the scraper 13 is provided with a wear-resistant ring 8, and the wear-resistant ring 8 is in contact with the outer wall of the piston rod 2. The sealing ring 12 is in contact with the piston rod 2. A feed hole 19 is provided on the top of the collecting tank 10, a feed hole 2 is provided on the outer wall of one side of the collecting chamber 15, a connecting hole 16 is provided at the bottom of the collecting chamber 15 to communicate with the collecting tank 10, a sealing plug 17 is provided inside the top wall of the collecting tank 10, a cavity is provided inside the collecting chamber 15, and the interior of the collecting chamber 15 adopts a hollow design.

[0026] Specifically, by providing a sealing structure 1, during use, when the piston rod 2 is extended, the scraper 13 facing downward will scrape the surface of the piston rod 2, and at the same time, the wear-resistant ring 8 will improve the sealing performance of the telescopic rod, thereby making it difficult for oil stains to adhere to the surface of the piston rod 2, thereby reducing the dust adhesion performance and avoiding a large amount of dust from adhering to the outer wall of the piston rod 2. When the piston rod 2 is retracted, the scraper 13 facing upward will scrape the outer wall of the piston rod 2, thereby preventing the dust attached to the outer wall of the piston rod 2 from affecting the use between it and the sealing ring 3, greatly improving the service life of the sealing ring 3, preventing the sealing ring 3 from being damaged by dust, and helping to protect the sealing ring 3.

[0027] The oil seal structure includes an oil seal bracket 21, a fastening ring 11, a dustproof end cover 19 and a sealing bolt 20. The oil seal bracket 21 is arranged inside the cylinder body 1, the dustproof end cover 19 is threadedly installed on the top of the cylinder body 1, the sealing ring 12 is threadedly installed inside the dustproof end cover 19, the sealing bolt 20 is threadedly inserted into the inside of the dustproof end cover 19 and extends to the top wall of the oil seal bracket 21, the fastening ring 11 is movably sleeved inside a side wall of the oil seal bracket 21, and the oil seal bracket 21 is in contact with the outer wall of the piston rod 2.

[0028] Specifically, when in use, the sealing bolt 20 can be switched, and sealing oil can be injected into the oil sealing bracket 21 to keep the internal oil amount constant, thereby increasing the sealing performance between the cylinder body 1 and the piston rod 2 and avoiding gas leakage inside the cylinder body 1. At the same time, the sealing performance of the sealing structure can also be judged according to the amount of sealing oil on the surface of the piston rod 2. If the oil amount is too high, it means that the sealing structure is damaged.

[0029] The second sealing structure includes a sealing sleeve 18 , an annular spring 22 and a mounting sleeve 23 . The mounting sleeve 23 and the sealing sleeve 18 are both embedded in the side wall of the cylinder body 1 , with an annular spring 22 disposed therebetween. The annular spring 22 is movably sleeved on the outside of the sealing sleeve 18 .

[0030] Specifically, when in use, the annular spring 22 can prevent the sealing sleeve 18 from loosening, and can reinforce the sealing sleeve 18, thereby improving its sealing performance and extending its service life.

[0031] A sealing ring 3 and a dust ring 4 are embedded in the bottom end of the piston rod 2, a top plate 7 is fixedly installed on the top of the piston rod 2, a lifting ring 2 6 is fixedly installed on the top of the top plate 7, and a lifting ring 1 5 is fixedly installed on the bottom end of the cylinder body 1.

[0032] Specifically, the use of the sealing ring 3 and the dust ring 4 is conducive to preventing the upper and lower cavities inside the cylinder body 1 from communicating with each other, thereby allowing the pressure of the cavity below the cylinder body 1 to be changed, and the inside of the cylinder body 1 is externally connected to an inflation valve.

[0033] In summary, compared with the prior art, the gas spring has at least the following beneficial effects: by providing a sealing structure 1, during use, when the piston rod 2 is extended, the scraper 13 facing downward will scrape the surface of the piston rod 2, and at the same time, the wear-resistant ring 8 will improve the sealing performance of the telescopic rod, and thus it is not easy for oil stains to adhere to the surface of the piston rod 2, thereby reducing the dust adhesion performance and avoiding a large amount of dust from adhering to the outer wall of the piston rod 2. When the piston rod 2 is retracted, the scraper 13 facing upward will scrape the outer wall of the piston rod 2, thereby preventing the dust attached to the outer wall of the piston rod 2 from affecting its use with the sealing ring 3, greatly improving the service life of the sealing ring 3, preventing the sealing ring 3 from being damaged by dust, and helping to protect the sealing ring 3.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A furniture gas spring with good sealing performance, characterized in that: include: A cylinder body (1) and a piston rod (2), wherein the piston rod (2) is movably inserted into the interior of the cylinder body (1), and a sealing structure 1 and a sealing structure 2 as well as an oil seal structure movably connected to the piston rod (2) are arranged inside the top end of the cylinder body (1), wherein the sealing structure 1 comprises a wear-resistant ring (8), a feed hole 1 (9), a collecting groove (10), a sealing ring (12), a scraper (13), a mounting ring (14), a collecting chamber (15), a connecting hole (16) and a sealing plug (17), wherein the collecting groove (10) is threadedly mounted inside the sealing ring (12), the collecting chamber (15) is fixedly mounted on the top of the sealing ring (12), and an inner wall of one side of the collecting chamber (15) is fixedly mounted. A scraper (13) is provided, the scraper (13) is designed as an arc plate, and two groups are arranged in an upward and downward symmetrical direction. The other ends of the scrapers (13) are in contact with the outer wall of the piston rod (2). The inner wall of the scraper (13) is provided with a wear-resistant ring (8), and the wear-resistant ring (8) is in contact with the outer wall of the piston rod (2). The sealing ring (12) is in contact with the piston rod (2). A feed hole 1 (9) is provided at the top of the collecting groove (10), a feed hole 2 is provided on one side outer wall of the collecting chamber (15), a connecting hole (16) is provided at the bottom of the collecting chamber (15) and is connected to the collecting groove (10), and a sealing plug (17) is provided inside the top wall of the collecting groove (10).

2. A furniture gas spring with good sealing performance according to claim 1, characterized in that: The collecting chamber (15) has a cavity formed inside, and the interior of the collecting chamber (15) is hollow.

3. A furniture gas spring with good sealing performance according to claim 2, characterized in that: The oil seal structure comprises an oil seal support (21), a fastening ring (11), a dust cover (19) and a sealing bolt (20); the oil seal support (21) is arranged inside the cylinder body (1); the dust cover (19) is threadedly mounted on the top of the cylinder body (1); the sealing ring (12) is threadedly mounted inside the dust cover (19); and the sealing bolt (20) is threadedly inserted into the inside of the dust cover (19) and extends to the inside of the top wall of the oil seal support (21).

4. A furniture gas spring with good sealing performance according to claim 3, characterized in that: The fastening ring (11) is movably sleeved inside a side wall of the oil seal bracket (21), and the oil seal bracket (21) is in contact with the outer wall of the piston rod (2).

5. A furniture gas spring with good sealing performance according to claim 4, characterized in that: The second sealing structure comprises a sealing sleeve (18), an annular spring (22) and a mounting sleeve (23); the mounting sleeve (23) and the sealing sleeve (18) are both embedded in the side wall of the cylinder body (1); an annular spring (22) is arranged between the two; the annular spring (22) is movably sleeved on the outside of the sealing sleeve (18).

6. A furniture gas spring with good sealing performance according to claim 1, characterized in that: A sealing ring (3) and a dust ring (4) are embedded in the bottom end of the piston rod (2), a top plate (7) is fixedly installed on the top end of the piston rod (2), a second lifting ring (6) is fixedly installed on the top of the top plate (7), and a first lifting ring (5) is fixedly installed on the bottom end of the cylinder body (1).

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