Multifunctional hardware connecting system with dustproof device

Abstract

The invention discloses a multifunctional hardware connecting system with a dustproof device, and relates to the technical field of hardware connecting pieces, the multifunctional hardware connecting system comprises a main body mechanism, the main body mechanism comprises a guide rail and a sliding plate, and a rotating rod is fixedly mounted on one side of the sliding plate. The sealing unit is arranged, and a closed space is formed among the blocking cover, the sealing cloth and the guide groove of the guide rail, so that dust, dirt and other external impurities are prevented from entering the guide groove and influencing rotation of the roller, the roller is protected against damage, the service life is prolonged, and the cleaning unit is arranged, so that the cleaning efficiency is improved. Dust in the guide rail is driven to be discharged outwards through the air pressure difference formed by movement of the piston plate, cleanliness and tidiness of the guide rail and the guide groove are kept, abrasion and corrosion of dust to equipment parts are reduced, the service life of the equipment is prolonged, the maintenance cost is reduced, the maintenance time is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hardware connectors, in particular to a multifunctional hardware connection system with a built-in dustproof device. Background Art

[0002] Slide rails, also known as guide rails and slideways, refer to hardware connection components fixed to the cabinet of furniture for the movement of drawers or cabinet panels of furniture in and out. Slide rails are suitable for drawer connections of wooden and steel drawers of cabinets, furniture, document cabinets, bathroom cabinets and other furniture.

[0003] A Chinese patent application numbered "202110694708.1" discloses a "hardware connection system with multifunctional use and built-in dustproof device". In this patent, the support code is picked up and inserted into the through groove in the guide rail. After the support code is inserted, the two rail covers are picked up and respectively inserted into the front and rear ends of the guide rail, and then the rail covers are fixed by fixing screws. This can achieve good dustproof effects and ensure the normal use of the guide rail. It is highly practical, but only the two sides of the guide rail are sealed. However, there is a certain gap between the guide groove between the guide rail and the pulley, which causes dust to enter the inner cavity of the guide rail from here, thereby causing internal pollution and making it difficult to seal the guide between the pulley and the guide rail.

[0004] Combining the above problems, we will find that it is difficult to avoid the above problems at the same time when using the existing hardware connection system with built-in dustproof device and multiple functions on the market, and even if it can be solved, it needs to be solved with the cooperation of external tools, which cannot achieve the desired effect. Therefore, we propose a hardware connection system with built-in dustproof device and multiple functions. Summary of the invention

[0005] The object of the present invention is to provide a multifunctional hardware connection system with a built-in dustproof device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a hardware connection system with a multifunctional dustproof device, comprising a main body mechanism, the main body mechanism comprising a guide rail and a sliding plate, a rotating rod is fixedly installed on one side of the sliding plate, a surface of the rotating rod is rotatably connected to a roller via a rotating shaft, a guide groove is provided on the inner wall of the guide rail, an inner cavity of the guide groove is slidably connected to the surface of the roller, and a dust removal mechanism is provided in the inner cavity of the guide rail; The dust removal mechanism includes a sealing unit, which is arranged on the inner wall of the guide rail and is used to seal the opening of the guide groove; The dust removal mechanism also has a cleaning unit, which is arranged in the inner cavity of the guide groove and is used for centralized processing of dust in the inner cavity of the guide groove; A disassembly mechanism is provided on the surface of the guide rail, and the disassembly mechanism is used to disassemble the guide rail.

[0007] Preferably, the sealing unit includes a connecting rod, which is rotatably connected to the inner wall of the guide rail, a baffle cover is fixedly installed on one end of the connecting rod, a sealing groove is opened on the inner wall of the guide groove, an adjusting rod is rotatably connected to the sealing groove, a groove is formed on the surface of the adjusting rod, a spring is sleeved on the surface of the adjusting rod, one end of the spring is slidably connected to the inner cavity of the groove, the other end of the spring is fixedly connected to the inner wall of the sealing groove, a sealing cloth is fixedly installed on the surface of the adjusting rod, a mounting block is fixedly installed on one end of the sealing cloth, and the surface of the mounting block is fixedly connected to the surface of the rotating rod.

[0008] Preferably, a support groove is provided on the surface of the guide rail, a support plate is fixedly mounted on the surface of the rotating rod, and the surface of the support plate is slidably connected to the inner cavity of the support groove.

[0009] Preferably, the cleaning unit includes a support rod, which is fixedly mounted on the surface of a rotating rod, a piston plate is fixedly mounted on the surface of the connecting rod, the piston plate is in close contact with the inner wall of the guide groove, a gear is fixedly mounted on one end of the connecting rod, a tooth plate is fixedly mounted on the surface of the rotating rod, and the tooth plate is used in conjunction with the teeth of the gear. Preferably, a moving groove is provided on the surface of the guide rail, a moving block is fixedly mounted on the surface of the tooth plate, and the surface of the moving block is slidably connected to the inner cavity of the moving groove.

[0010] Preferably, a torsion spring is provided on the inner wall of the guide rail, one end of the torsion spring is fixedly connected to the inner wall of the guide rail, the other end of the torsion spring is fixedly connected to the surface of the gear, and the rotating rod is sleeved in the inner cavity of the torsion spring.

[0011] Preferably, a limiting groove is provided on the inner wall of the guide rail, a limiting rod is fixedly mounted on the surface of the gear, and the surface of the limiting rod is slidably connected to the inner cavity of the limiting groove.

[0012] Preferably, an elastic hook is fixedly mounted on the bottom of the guide rail, and the inner side of the elastic hook cooperates with the surface of the blocking cover.

[0013] Preferably, the disassembly mechanism includes a fixing groove, which is opened on the surface of the guide rail, a sealing plate is provided on one side of the guide rail, a fixing rod is fixedly installed on the surface of the sealing plate, the surface of the fixing rod is slidably connected to the inner cavity of the fixing groove, a positioning rod is fixedly installed on the inner wall of the fixing rod, and an elastic clip is fixedly installed in the inner cavity of the fixing groove, and the inner side of the elastic clip is in contact with the surface of the positioning rod.

[0014] Preferably, a sealing ring is fixedly mounted on the surface of the sealing plate, and the surface of the sealing ring is in close contact with the inner wall of the guide rail.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a sealing unit to form a closed space between the blocking cover, the sealing cloth and the guide groove of the guide rail, thereby preventing dust, dirt and other external impurities from entering the guide groove and affecting the rotation of the roller, thereby protecting the roller from damage and extending the service life. The present invention provides a cleaning unit, and the air pressure difference formed by the movement of the piston plate drives the dust inside the guide rail to be discharged outward, thereby keeping the guide rail and the guide groove clean and tidy. This not only reduces the wear and corrosion of equipment parts caused by dust, and extends the life of the equipment, but also reduces maintenance costs and time, and improves work efficiency. The present invention provides a disassembly mechanism, and can realize rapid separation of the sealing plate and the guide rail by simply pulling the guide rail outward without complicated disassembly steps, thereby significantly improving the efficiency of maintenance or inspection, thereby shortening the time for users to inspect and repair rollers, etc., and increasing the efficiency of maintenance or inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the guide rail of the present invention; Figure 3 It is a structural sectional view of the guide rail of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the mainspring spring and the regulating rod of the present invention.

[0018] Figure 5 It is a structural exploded view of the mainspring spring and the regulating rod of the present invention.

[0019] Figure 6 It is a schematic structural diagram of the blocking cover of the present invention.

[0020] Figure 7 It is a schematic diagram of the structure of the limiting groove of the present invention.

[0021] Figure 8It is a schematic diagram of the structure of the rotating rod and the roller of the present invention; Fig. 9 It is a structural cross-sectional view of the fixing groove of the present invention; Fig.10 It is a schematic structural diagram of the fixing rod and the positioning rod of the present invention.

[0022] In the figure: 1, main body; 11, guide rail; 12, sliding plate; 13, rotating rod; 14, roller; 15, guide groove; 2, dust removal mechanism; 21, sealing unit; 2101, connecting rod; 2102, blocking cover; 2103, sealing groove; 2104, adjusting rod; 2105, card slot; 2106, spring spring; 2107, sealing cloth; 2108, mounting block; 2109, supporting groove; 2110, supporting plate; 22 , cleaning unit; 2201, support rod; 2202, piston plate; 2203, gear; 2204, tooth plate; 2205, moving groove; 2206, moving block; 2207, torsion spring; 2208, limiting groove; 2209, limiting rod; 2210, elastic hook; 3, disassembly mechanism; 301, fixing groove; 302, sealing plate; 303, fixing rod; 304, elastic clip; 305, positioning rod; 306, sealing ring. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1-Figure 9 The present invention provides a technical solution: a multifunctional hardware connection system with a dustproof device, comprising a main body mechanism 1, the main body mechanism 1 comprising a guide rail 11 and a sliding plate 12, a rotating rod 13 is fixedly installed on one side of the sliding plate 12, a roller 14 is rotatably connected to the surface of the rotating rod 13 through a rotating shaft, a guide groove 15 is opened on the inner wall of the guide rail 11, the inner cavity of the guide groove 15 is slidably connected to the surface of the roller 14, and a dust removal mechanism 2 is arranged in the inner cavity of the guide rail 11; The dust removal mechanism 2 includes a sealing unit 21 , which is disposed on the inner wall of the guide rail 11 . The sealing unit 21 is used to seal the opening of the guide groove 15 .

[0025] As a further definition of the present invention, the sealing unit 21 includes a connecting rod 2101, the connecting rod 2101 is rotatably connected to the inner wall of the guide rail 11, a baffle 2102 is fixedly installed on one end of the connecting rod 2101, a sealing groove 2103 is opened on the inner wall of the guide groove 15, and an adjusting rod 2104 is rotatably connected to the sealing groove 2103. A card slot 2105 begins to be formed on the surface of the adjusting rod 2104, and a spring 2106 is sleeved on the surface of the adjusting rod 2104. One end of the spring 2106 is slidably connected to the inner cavity of the card slot 2105, and the other end of the spring 2106 is connected to the sealing groove. The inner wall of the guide rail 11 is fixedly connected to the adjusting rod 2104, a sealing cloth 2107 is fixedly installed on the surface of the adjusting rod 2104, a mounting block 2108 is fixedly installed on one end of the sealing cloth 2107, and the surface of the mounting block 2108 is fixedly connected to the surface of the rotating rod 13. By setting the sealing unit 21, a closed space is formed between the blocking cover 2102, the sealing cloth 2107 and the guide groove 15 of the guide rail 11, thereby preventing dust, dirt and other external impurities from entering the guide groove 15 and affecting the rotation of the roller 14, thereby protecting the roller 14 from damage and extending the service life; A support groove 2109 is provided on the surface of the guide rail 11, and a support plate 2110 is fixedly installed on the surface of the rotating rod 13. The surface of the support plate 2110 is slidably connected to the inner cavity of the support groove 2109. Through the sliding connection between the support plate 2110 and the support groove 2109, the movement of the rotating rod 13 can be guided, so that the sliding plate 12 can be prevented from being deflected during the movement of the rotating rod 13.

[0026] The specific implementation of this embodiment is as follows: using a movable sliding plate 12, the movement of the sliding plate 12 can drive the rotating rod 13 to slide in the guide groove 15 of the inner cavity of the guide rail 11, and at the same time drive the roller 14 to rotate in the inner cavity of the guide groove 15, so as to realize the connection of the two connecting parts. During the movement of the rotating rod 13, the mounting block 2108 can be driven to slide in the inner cavity of the sealing groove 2103, drive the sealing cloth 2107 to move, and at the same time make the adjusting rod 2104 rotate. During the rotation of the adjusting rod 2104, the clockwork spring 2106 can start to be wound, so that the clockwork spring 2106 is in an energy storage state, and the clockwork spring 2106 on the other side will release the stored energy, thereby driving the adjusting rod 2104 to wind up the sealing cloth 2107 on the other side. By shielding the two sides of the guide rail 11 with the cover plate, the guide rail 11 and the guide groove 15 can form a closed space, thereby reducing dust from entering the inner cavity of the guide groove 15, and ensuring the normal operation of the roller 14.

[0027] Example 2: Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 The present invention provides a technical solution: a multifunctional hardware connection system with its own dustproof device. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The dust removal mechanism 2 also has a cleaning unit 22, and the cleaning unit 22 is arranged in the inner cavity of the guide groove 15. The cleaning unit 22 is used to centrally process the dust in the inner cavity of the guide groove 15.

[0028] As a further limitation of the present invention, the cleaning unit 22 includes a support rod 2201, which is fixedly mounted on the surface of the rotating rod 13, a piston plate 2202 is fixedly mounted on the surface of the connecting rod 2101, and the piston plate 2202 is in close contact with the inner wall of the guide groove 15, a gear 2203 is fixedly mounted on one end of the connecting rod 2101, and a tooth plate 2204 is fixedly mounted on the surface of the rotating rod 13, and the tooth plate 2204 cooperates with the teeth of the gear 2203. By setting the cleaning unit 22, the air pressure difference formed by the movement of the piston plate 2202 drives the dust inside the guide rail 11 to be discharged outward, thereby keeping the guide rail 11 and the guide groove 15 clean and tidy, which not only reduces the wear and corrosion of equipment components by dust, prolongs the life of the equipment, but also reduces the maintenance cost and time, and improves the work efficiency; A moving groove 2205 is provided on the surface of the guide rail 11, and a moving block 2206 is fixedly installed on the surface of the tooth plate 2204. The surface of the moving block 2206 is slidably connected with the inner cavity of the moving groove 2205. Through the sliding connection between the moving groove 2205 and the moving block 2206, the movement of the tooth plate 2204 can be guided, so that the tooth plate 2204 can move horizontally; The inner wall of the guide rail 11 is provided with a torsion spring 2207, one end of the torsion spring 2207 is fixedly connected to the inner wall of the guide rail 11, and the other end of the torsion spring 2207 is fixedly connected to the surface of the gear 2203. The rotating rod 13 is sleeved in the inner cavity of the torsion spring 2207. By providing the torsion spring 2207, when the tooth plate 2204 and the teeth of the gear 2203 are no longer engaged, the reaction force of the torsion spring 2207 can reset the blocking cover 2102, thereby ensuring the sealing of the guide rail 11; A limiting groove 2208 is provided on the inner wall of the guide rail 11, and a limiting rod 2209 is fixedly installed on the surface of the gear 2203. The surface of the limiting rod 2209 is slidably connected to the inner cavity of the limiting groove 2208. The sliding connection between the limiting groove 2208 and the limiting rod 2209 can limit the rotation angle of the blocking cover 2102, avoid excessive rotation of the blocking cover 2102, avoid excessive twisting of the torsion spring 2207, and increase the service life of the torsion spring 2207. An elastic hook 2210 is fixedly installed at the bottom of the guide rail 11, and the inner side of the elastic hook 2210 cooperates with the surface of the block cover 2102. By setting the elastic hook 2210, the elastic potential energy of the torsion spring 2207 is greater than the elastic potential energy of the elastic hook 2210. When the block cover 2102 overlaps with one side of the guide rail 11, the hook will contact the block cover 2102, thereby achieving the purpose of fixing the position of the block cover 2102.

[0029] The specific implementation method of this embodiment is as follows: in the process of the rotating rod 13 driving the roller 14 to rotate, the piston plate 2202 is supported by the support rod 2201, and in the sealed space formed between the guide rail 11, the baffle cover 2102 and the sealing cloth 2107, the inner cavity of the guide rail 11 can form an air pressure higher than the external air pressure through the movement of the piston plate 2202. When the tooth plate 2204 contacts the gear 2203, the baffle cover 2102 can be rotated to open. After the external air pressure contacts the air pressure inside the guide rail 11, the dust inside the guide rail 11 can be driven to move to the outside under the action of the air pressure difference, thereby realizing self-cleaning of the dust inside the guide rail 11 and ensuring the cleanliness of the inside of the guide groove 15.

[0030] Example 3: Please refer to Figure 1 , Figure 7 , Fig. 9 and Fig.10 The present invention provides a technical solution: a multifunctional hardware connection system with a built-in dustproof device. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. A disassembly mechanism 3 is provided on the surface of the guide rail 11, and the disassembly mechanism 3 is used to disassemble the guide rail 11.

[0031] As a further limitation of the present invention, the disassembly mechanism 3 includes a fixing groove 301, the fixing groove 301 is opened on the surface of the guide rail 11, a sealing plate 302 is provided on one side of the guide rail 11, a fixing rod 303 is fixedly installed on the surface of the sealing plate 302, the surface of the fixing rod 303 is slidably connected with the inner cavity of the fixing groove 301, a positioning rod 305 is fixedly installed on the inner wall of the fixing rod 303, an elastic clip 304 is fixedly installed in the inner cavity of the fixing groove 301, and the inner side of the elastic clip 304 is in contact with the surface of the positioning rod 305. By providing the disassembly mechanism 3, the sealing plate 302 can be quickly separated from the guide rail 11 by simply pulling the guide rail 11 outward, without complicated disassembly steps, thereby significantly improving the work efficiency of maintenance or inspection, thereby shortening the time for users to inspect and repair the roller 14, etc., and increasing the work efficiency of maintenance or inspection; A sealing ring 306 is fixedly installed on the surface of the sealing plate 302, and the surface of the sealing ring 306 is in close contact with the inner wall of the guide rail 11. By setting the sealing ring 306, the sealing between the sealing plate 302 and the guide rail 11 can be increased, thereby further improving the working effect of the piston plate 2202 and ensuring stability during self-cleaning.

[0032] The specific implementation method of this embodiment is as follows: when inspecting other parts such as the roller 14, the user only needs to pull the guide rail 11 outward to move the positioning rod 305 out of the inner cavity of the elastic clip 304, and move the fixing rod 303 out of the inner cavity of the fixing groove 301, thereby achieving rapid separation between the sealing plate 302 and the guide rail 11, thereby shortening the time for the user to inspect and repair the roller 14, etc., and increasing the work efficiency of maintenance or inspection.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional hardware connection system with a built-in dustproof device, comprising a main body (1), characterized in that: The main body mechanism (1) comprises a guide rail (11) and a sliding plate (12); a rotating rod (13) is fixedly mounted on one side of the sliding plate (12); a surface of the rotating rod (13) is rotatably connected to a roller (14) via a rotating shaft; a guide groove (15) is provided on the inner wall of the guide rail (11); an inner cavity of the guide groove (15) is slidably connected to the surface of the roller (14); and a dust removal mechanism (2) is provided in the inner cavity of the guide rail (11); The dust removal mechanism (2) comprises a sealing unit (21), wherein the sealing unit (21) is arranged on the inner wall of the guide rail (11), and the sealing unit (21) is used to perform sealing processing on the opening of the guide groove (15); The dust removal mechanism (2) further includes a cleaning unit (22), wherein the cleaning unit (22) is arranged in the inner cavity of the guide groove (15), and the cleaning unit (22) is used to centrally process dust in the inner cavity of the guide groove (15); A disassembly mechanism (3) is provided on the surface of the guide rail (11), and the disassembly mechanism (3) is used to disassemble the guide rail (11).

2. A multifunctional hardware connection system with built-in dustproof device according to claim 1, characterized in that: The sealing unit (21) comprises a connecting rod (2101), the connecting rod (2101) being rotatably connected to the inner wall of the guide rail (11), a blocking cover (2102) being fixedly mounted on one end of the connecting rod (2101), a sealing groove (2103) being provided on the inner wall of the guide groove (15), an adjusting rod (2104) being rotatably connected to the sealing groove (2103), a clamping groove (2105) being provided on the surface of the adjusting rod (2104), and a sealing groove (2106) being provided on the surface of the adjusting rod (2104). A spring (2106) is sleeved, one end of the spring (2106) is slidably connected to the inner cavity of the clamping slot (2105), the other end of the spring (2106) is fixedly connected to the inner wall of the sealing slot (2103), a sealing cloth (2107) is fixedly mounted on the surface of the adjusting rod (2104), one end of the sealing cloth (2107) is fixedly mounted with a mounting block (2108), and the surface of the mounting block (2108) is fixedly connected to the surface of the rotating rod (13).

3. The multifunctional hardware connection system with dustproof device according to claim 2, characterized in that: A support groove (2109) is provided on the surface of the guide rail (11), a support plate (2110) is fixedly mounted on the surface of the rotating rod (13), and the surface of the support plate (2110) is slidably connected to the inner cavity of the support groove (2109).

4. The multifunctional hardware connection system with built-in dustproof device according to claim 2, characterized in that: The cleaning unit (22) comprises a support rod (2201), wherein the support rod (2201) is fixedly mounted on the surface of the rotating rod (13); a piston plate (2202) is fixedly mounted on the surface of the connecting rod (2101), wherein the piston plate (2202) is in close contact with the inner wall of the guide groove (15); a gear (2203) is fixedly mounted on one end of the connecting rod (2101); a toothed plate (2204) is fixedly mounted on the surface of the rotating rod (13), and the toothed plate (2204) cooperates with the teeth of the gear (2203) for use.

5. The multifunctional hardware connection system with dustproof device according to claim 4, characterized in that: A moving groove (2205) is provided on the surface of the guide rail (11), a moving block (2206) is fixedly mounted on the surface of the tooth plate (2204), and the surface of the moving block (2206) is slidably connected to the inner cavity of the moving groove (2205).

6. The multifunctional hardware connection system with built-in dustproof device according to claim 4, characterized in that: The inner wall of the guide rail (11) is provided with a torsion spring (2207), one end of the torsion spring (2207) is fixedly connected to the inner wall of the guide rail (11), the other end of the torsion spring (2207) is fixedly connected to the surface of the gear (2203), and the rotating rod (13) is sleeved in the inner cavity of the torsion spring (2207).

7. The multifunctional hardware connection system with dustproof device according to claim 4, characterized in that: The inner wall of the guide rail (11) is provided with a limiting groove (2208), a limiting rod (2209) is fixedly mounted on the surface of the gear (2203), and the surface of the limiting rod (2209) is slidably connected to the inner cavity of the limiting groove (2208).

8. The multifunctional hardware connection system with built-in dustproof device according to claim 4, characterized in that: An elastic hook (2210) is fixedly mounted on the bottom of the guide rail (11), and the inner side of the elastic hook (2210) cooperates with the surface of the blocking cover (2102).

9. The multifunctional hardware connection system with dustproof device according to claim 1, characterized in that: The disassembly mechanism (3) comprises a fixing groove (301), the fixing groove (301) being formed on the surface of the guide rail (11), a sealing plate (302) being provided on one side of the guide rail (11), a fixing rod (303) being fixedly mounted on the surface of the sealing plate (302), the surface of the fixing rod (303) being slidably connected to the inner cavity of the fixing groove (301), a positioning rod (305) being fixedly mounted on the inner wall of the fixing rod (303), an elastic clip (304) being fixedly mounted in the inner cavity of the fixing groove (301), the inner side of the elastic clip (304) being in contact with the surface of the positioning rod (305).

10. A multifunctional hardware connection system with built-in dustproof device according to claim 9, characterized in that: A sealing ring (306) is fixedly mounted on the surface of the sealing plate (302), and the surface of the sealing ring (306) is in close contact with the inner wall of the guide rail (11).

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