A rail structure with a cleaning assembly

Abstract

The present application belongs to the technical field of guide rail cleaning, and particularly relates to a guide rail structure with a cleaning assembly, which comprises a base plate, a mounting plate, a slide rail, a sliding block, a scissor assembly and a cleaning assembly; the cleaning assembly comprises a cleaning box, an ash collecting rubber ring, the cleaning box is installed in a sliding groove of the slide rail, the ash collecting rubber ring is connected with the scissor assembly, brushes and collecting holes are arranged on the cleaning box, and the cleaning box and an exhaust port are both provided with one-way opening ash collecting baffles and exhaust baffles. When the scissor assembly is unfolded, the scissor assembly pulls the ash collecting rubber ring, at this time, external gas enters the cleaning box through the collecting holes and drives the ash collecting baffles to open, so that the external gas enters the ash collecting rubber ring, at this time, the ash collecting rubber ring gradually restores to the original state, at this time, the external gas sucks the dust and metal powder on the brushes into the cleaning box, the self-cleaning of the dust and metal powder on the brushes is realized, the cleaning ability of the brushes is improved, and the abrasion of the slide rail sliding groove caused by the dust and metal powder adhered to the brushes is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of guide rail cleaning, and particularly relates to a guide rail structure with a cleaning assembly. BACKGROUND

[0002] With the development of automation, precise guide rails play a very important role in the reciprocating process of automatic control. For example, in the working process of a grinding machine, a workpiece is placed on a workbench, and grinding machining is completed by moving the workbench along a rail. The straightness and flatness of the machined workpiece are ensured by the action of the rail. However, the maintenance of the precise guide rail is becoming more and more important.

[0003] Most precise lathe guide rails are cleaned by dustproof brushes. For example, a Chinese patent with the publication number CN215543614U mainly cleans dust and turning powder in the guide rail groove by a dustproof brush. However, with the continuous use of the dustproof brush, the dustproof brush will stick to dust and turning metal powder, resulting in that the cleaning effect of the dustproof brush will become worse and worse. Meanwhile, the metal powder on the dustproof brush will also wear the guide rail groove, reducing the precision of the guide rail. SUMMARY

[0004] The application aims at solving the technical problems in the prior art by providing a guide rail structure with a cleaning assembly.

[0005] The application can be realized by the following technical scheme: a guide rail structure with a cleaning assembly, comprising a base plate, a sliding rail and a sliding block, the sliding rail is installed on the base plate, the sliding rail is in sliding cooperation with the sliding block, installation plates are installed at both ends of the sliding rail, a scissor assembly is installed between the installation plates and the sliding block, and a cleaning assembly is installed on the scissor assembly.

[0006] The cleaning assembly comprises a cleaning box, a dust collecting rubber ring and an exhaust port, the cleaning box is installed in a sliding groove of the sliding rail, the dust collecting rubber ring is connected with the scissor assembly, an exhaust port is installed at an end of the dust collecting rubber ring away from the sliding rail, brushes and collecting holes are arranged on the cleaning box, dust collecting baffles and exhaust baffles which are opened in one direction are installed on the cleaning box and the exhaust port, when the scissor assembly is tightened, the scissor assembly extrudes the dust collecting rubber ring, so that the exhaust baffles are opened and the dust collecting baffles are closed, when the scissor assembly is unfolded, the scissor assembly pulls the dust collecting rubber ring, so that the dust collecting baffles are opened and the exhaust baffles are closed.

[0007] As a further optimization or improvement of the present application, the scissor assembly comprises a plurality of scissor links, each scissor link is composed of a connecting link and a moving link, the connecting link and the moving link are rotationally connected, an extrusion ring is installed on the connecting link, and the extrusion ring is connected with the dust collecting rubber ring.

[0008] As a further optimization or improvement of the present scheme, the exhaust baffle is provided with a baffle one near one end of the dust collecting ring, and a baffle two is provided at the other end of the dust collecting ring, and the baffle one and the baffle two are connected with the exhaust baffle and the dust collecting baffle through springs respectively.

[0009] As a further optimization or improvement of the present scheme, an accordion protective cover is arranged between the sliding block and the mounting plate, and the accordion protective cover is sleeved on the scissor assembly, and the accordion protective cover is connected with the rotating joint on the scissor assembly, and a mounting hole is arranged on the accordion protective cover, and the exhaust port penetrates through the mounting hole.

[0010] As a further optimization or improvement of the present scheme, a collecting assembly is arranged between the dust collecting baffles, and the collecting assembly comprises a filter screen cover, and the dust collecting baffles are connected through the filter screen cover.

[0011] As a further optimization or improvement of the present scheme, the collecting assembly further comprises a dust collecting frame, the dust collecting frame is arranged on the dust collecting baffle, and a dust collecting box is arranged at the bottom of the dust collecting frame.

[0012] As a further optimization or improvement of the present scheme, the brush is arranged in multiple rows, and each row of the brush is located between adjacent collecting holes.

[0013] The present application has the following advantages:

[0014] (1) The sliding block moves to drive the scissor assembly at one end of the sliding block to be tightened, and the scissor assembly at the other end of the sliding block to be unfolded. When the scissor assembly is tightened, the scissor assembly will extrude the dust collecting ring, and when the scissor assembly extrudes the dust collecting ring, the gas in the dust collecting ring will open the exhaust baffle and flow out from the exhaust baffle, and at this time the dust collecting ring is gradually flattened; when the sliding block moves reversely, the scissor assembly is unfolded, and the scissor assembly pulls the dust collecting ring, at this time the external gas will enter the cleaning box through the collecting hole and drive the dust collecting baffle to open, so that the external gas enters the dust collecting ring, at this time the dust collecting ring gradually restores to the original state, in the process, the external gas will suck the dust and metal powder on the brush into the cleaning box, realizing the self-cleaning of the dust and metal powder on the brush, improving the cleaning ability of the brush, and avoiding the abrasion of the dust and metal powder adhered on the brush to the sliding rail groove.

[0015] (2) The organ protective cover is sleeved on the scissor assembly, the folding part of the organ protective cover is connected with the rotating shaft of the scissor assembly, and finally the two ends of the organ protective cover are connected with the mounting plate and the sliding block respectively. After the organ protective cover is installed, the scissor assembly can provide support for the organ protective cover, when the organ protective cover is impacted from outside, the scissor assembly can provide support for the organ protective cover, thereby avoiding deformation of the organ protective cover. Although the scissor assembly can avoid deformation of the organ protective cover, the folding part of the organ protective cover will still be concave when impacted from outside. When the sliding block moves, the sliding block pushes the scissor assembly, so that the scissor assembly is compressed and tightened. Since the folding part of the organ protective cover is connected with the rotating shaft of the scissor assembly, the scissor assembly can guide the organ protective cover to fold when being tightened. Even if the folding part of the organ protective cover is concave, the scissor assembly can guide the concave part of the organ protective cover to restore to its original state, so that the organ protective cover can realize self-repairing.

[0016] (3) The gas in the organ protective cover is transported outside the organ protective cover through the cleaning assembly, in this process, the heat in the organ protective cover is transported outside the organ protective cover through the cleaning assembly, so that the heat dissipation of the sliding rail and the sliding block is realized. If the sliding frequency of the sliding block increases, the transport frequency of the cleaning assembly also increases, so that the heat dissipation of the cleaning assembly can be self-adjusted according to the motion state of the sliding block.

[0017] (4) The filter screen cover is installed on the dust collecting baffle, so that dust and debris cannot enter the dust collecting rubber ring. Since the filter screen cover is vertically arranged, the dust and debris collected in the filter screen cover will accumulate at the bottom of the filter screen cover. When the dust collecting baffle is turned and opened, the dust collecting baffle will lift the filter screen cover, at this time, the accumulated dust and debris at the bottom of the filter screen cover will enter the dust collecting box through the dust collecting frame, so that the dust is collected, and the dust and debris cannot wear the inner surface of the dust collecting rubber ring. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described below in combination with the drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the application.

[0020] Figure 2 It is a schematic diagram of the structure of the scissor assembly.

[0021] Figure 3 It is an enlarged view of the A part of the organ protective cover. Figure 2

[0022] Figure 4 It is a schematic diagram of the structure of the cleaning assembly.

[0023] Figure 5 It is a sectional view of the structure of the cleaning assembly.

[0024] ​Figure 6 Figure 2 is a schematic view of the B site structure. Figure 5 Figure 3 is a schematic view of the B site structure.

[0025] Figure 7 Figure 4 is a schematic view of the installation position of the exhaust baffle and the dust collecting baffle.

[0026] Figure 8 Figure 5 is a schematic view of the cooperation between the cleaning assembly and the slide rail.

[0027] In the figure, 1 is a base plate, 2 is a mounting plate, 3 is a slide rail, 4 is a sliding block, 5 is an organ shield, 51 is a mounting hole, 6 is a scissor assembly, 61 is a connecting joint, 62 is an extrusion ring, 63 is a moving joint, 64 is a scissor joint, 7 is a cleaning assembly, 71 is a cleaning box, 72 is a dust collecting rubber ring, 73 is an exhaust port, 74 is a brush, 75 is an exhaust baffle, 751 is a baffle one, 76 is a dust collecting baffle, 761 is a baffle two, 77 is a collecting hole, 78 is a spring, 8 is a collecting assembly, 81 is a filter screen cover, 82 is a dust collecting frame, and 83 is a dust collecting box. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] Referring to Figures 2-5 A guide rail structure with a cleaning assembly, which comprises a base plate 1, a slide rail 3 and a sliding block 4, the slide rail 3 is installed on the base plate 1, the slide rail 3 is in sliding cooperation with the sliding block 4, mounting plates 2 are installed at both ends of the slide rail 3, a scissor assembly 6 is installed between the mounting plates 2 and the sliding block 4, and a cleaning assembly 7 is installed on the scissor assembly 6.

[0030] The cleaning assembly 7 comprises a cleaning box 71, a dust collecting rubber ring 72 and an exhaust port 73, the cleaning box 71 is installed in a sliding groove of the slide rail 3, the dust collecting rubber ring 72 is connected with the scissor assembly 6, the exhaust port 73 is installed at an end of the dust collecting rubber ring 72 away from the slide rail 3, a brush 74 and a collecting hole 77 are arranged on the cleaning box 71, and a dust collecting baffle 76 and an exhaust baffle 75 which are opened in one direction are installed on the cleaning box 71 and the exhaust port 73, respectively, when the scissor assembly 6 is tightened, the scissor assembly 6 extrudes the dust collecting rubber ring 72, so that the exhaust baffle 75 is opened and the dust collecting baffle 76 is closed; when the scissor assembly 6 is unfolded, the scissor assembly 6 pulls the dust collecting rubber ring 72, so that the dust collecting baffle 76 is opened and the exhaust baffle 75 is closed.

[0031] It should be noted that the exhaust baffle 75 and the dust collecting baffle 76 are made of light materials such as glass fiber reinforced plastic, so that when the scissor assembly 6 presses the dust collecting rubber ring 72, the gas inside the dust collecting rubber ring 72 can easily open the exhaust baffle 75.

[0032] In use, referring to Figure 2 , the present application moves the sliding block 4 to drive the scissor assembly 6 at one end of the sliding block 4 to tighten, and the scissor assembly 6 at the other end of the sliding block 4 to unfold.

[0033] When the scissor assembly 6 tightens, the scissor assembly 6 will press the dust collecting rubber ring 72, referring to Figure 5 , when the scissor assembly 6 presses the dust collecting rubber ring 72, the gas inside the dust collecting rubber ring 72 will open the exhaust baffle 75 and flow out from the exhaust baffle 75, at this time the dust collecting rubber ring 72 is gradually flattened; when the sliding block 4 moves reversely, the scissor assembly 6 unfolds, the scissor assembly 6 pulls the dust collecting rubber ring 72, at this time External air enters the cleaning box 71 through the collection holes 77 and drives the dust collecting baffle 76 to open, so that External air enters the ash collection grommet 72 At this time, the dust collecting rubber ring 72 gradually restores to its original state, and in this process, the external gas Ash and metal powder on the brush 74 are sucked into the cleaning box 71 Figures 2-3 , realizing self-cleaning of the dust and metal powder on the brush 74, improving the cleaning ability of the brush 74, and avoiding the adhesion of dust and metal powder on the brush 74 to wear the sliding groove of the sliding rail 3.

[0034] Referring to Figure 7 , the scissor assembly 6 comprises a plurality of scissor links 64, each scissor link 64 being composed of a connecting link 61 and a moving link 63, the connecting link 61 and the moving link 63 being rotationally connected, the connecting link 61 being provided with a pressing ring 62, and the pressing ring 62 being connected with the dust collecting rubber ring 72.

[0035] It should be noted that the scissor link 64 can also be composed of two moving links 63, so that the scissor link 64 can be freely combined to be reasonably distributed and installed on the cleaning assembly 7. The cleaning assembly 7 is distributed and installed on the scissor assembly 6, and the number of the cleaning assembly 7 is determined by the length of the sliding rail 3. When the sliding rail 3 is long, a plurality of cleaning assemblies 7 can be separately arranged on the scissor assembly 6; if the sliding rail 3 is short, the number of the cleaning assembly 7 can be reduced. The distributed installation of the cleaning assembly 7 on the scissor assembly 6 can ensure the cleaning effect of the cleaning assembly 7 on the sliding rail 3, and at the same time, can also reduce the influence of the cleaning assembly 7 on the stroke of the sliding block 4 as much as possible.

[0036] Referring to Figure 1 , the exhaust baffle 75 is provided with a baffle one 751 at one end close to the dust collecting rubber ring 72, the dust collecting baffle 76 is provided with a baffle two 761 at one end away from the dust collecting rubber ring 72, and the baffle one 751 and the baffle two 761 are connected with the exhaust baffle 75 and the dust collecting baffle 76 through springs 78 respectively.

[0037] Need to explain, exhaust baffle 75 and dust collecting baffle 76 is one-way opening, when pressing dust collecting rubber ring 72, the gas in dust collecting rubber ring 72 will open exhaust baffle 75, at this time the spring 78 between exhaust baffle 75 and block 751 is stretched, the gas in dust collecting rubber ring 72 is discharged through exhaust baffle 75, when the gas in dust collecting rubber ring 72 is exhausted, the spring 78 rebounds and drives exhaust baffle 75 to close, at this time dust collecting rubber ring 72 is in the state of being pressed flat; when pulling dust collecting rubber ring 72, because the cleaning box 71 is located in the slide groove of the slide rail 3, the gas in the slide groove will enter the cleaning box 71 through the collection hole 77 and drive the dust collecting baffle 76 to open, so that the gas enters the dust collecting rubber ring 72, at this time the dust collecting rubber ring 72 gradually recovers to the original state, the dust collecting rubber ring 72 sucks the dust and metal debris on the brush 74 into the cleaning box 71, realizing the cleaning of the brush 74 and ensuring the cleaning ability of the brush 74.

[0038] Referring to Figures 5-7 , the sliding block 4 and the mounting plate 2 are mounted with the accordion protective cover 5, and the accordion protective cover 5 is sleeved on the scissor assembly 6, the accordion protective cover 5 is connected with the rotating node on the scissor assembly 6, the mounting hole 51 is formed on the accordion protective cover 5, and the exhaust port 73 penetrates the mounting hole 51.

[0039] Need to explain, when the lathe works, the turned part debris will splash on the slide rail 3, when the sliding block 4 slides along the slide rail 3, the part debris will wear the slide rail 3 and the sliding block 4, the conventional preventive measure is to install the accordion protective cover 5 on the slide rail 3, the accordion protective cover 5 will block the debris, so that the accordion protective cover 5 plays a protective role.

[0040] The conventional accordion protective cover 5 uses nylon cloth and PVC skeleton material, the PVC skeleton supports the accordion protective cover 5, when the support structure of the accordion protective cover 5 is impacted and vibrated externally, if the support strength of the PVC skeleton is not enough, the accordion protective cover 5 is deformed by external impact, the folding part of the accordion protective cover 5 is concave, resulting in the failure of the protective cover.

[0041] Based on this, when the organ protective cover 5 is installed, the organ protective cover 5 is sleeved on the scissor assembly 6 first, the folding part of the organ protective cover 5 is connected with the rotating shaft of the scissor assembly 6 (the connection mode is not limited, which can be bolted or other fixed connection), and finally the two ends of the organ protective cover 5 are connected with the mounting plate 2 and the sliding block 4 respectively. After the organ protective cover 5 is installed, the scissor assembly 6 can provide support for the organ protective cover 5, and when the organ protective cover 5 is impacted by the outside, the scissor assembly 6 can provide support for the organ protective cover 5, thereby avoiding deformation of the organ protective cover 5. Although the scissor assembly 6 can avoid deformation of the organ protective cover 5, the folding part of the organ protective cover 5 will still be concave when impacted by the outside. When the sliding block 4 moves, the sliding block 4 pushes the scissor assembly 6, so that the scissor assembly 6 is compressed and tightened. Since the folding part of the organ protective cover 5 is connected with the rotating shaft of the scissor assembly 6, the scissor assembly 6 will guide the organ protective cover 5 to fold when it is tightened. Even if the folding part of the organ protective cover 5 is concave, the scissor assembly 6 can also guide the concave part of the organ protective cover 5 to restore to its original state, so that the organ protective cover 5 can realize self-repairing.

[0042] It should be noted that after the organ protective cover 5 is installed, the working heat of the sliding rail 3 and the sliding block 4 is easy to accumulate in the organ protective cover 5. The cleaning assembly 7 works to make the gas in the organ protective cover 5 transported to the outside of the organ protective cover 5. In this process, the heat in the organ protective cover 5 is transported to the outside of the organ protective cover 5 through the cleaning assembly 7, so as to realize heat dissipation of the working of the sliding rail 3 and the sliding block 4. If the sliding frequency of the sliding block 4 increases, the transport frequency of the cleaning assembly 7 is also increased, so that the heat dissipation of the cleaning assembly 7 can be self-adjusted according to the motion state of the sliding block 4.

[0043] Referring to Figure 4 The dust collecting baffle 76 is provided with a collecting assembly 8.

[0044] Specifically, the collecting assembly 8 further comprises a dust collecting frame 82, and the dust collecting frame 82 is arranged on the dust collecting baffle 76.

[0045] It should be noted that when the dust and metal debris on the brush 74 are sucked into the cleaning box 71 and the dust collecting rubber ring 72, the dust and debris in the dust collecting rubber ring 72 will wear the inner surface of the dust collecting rubber ring 72 when the pressing ring 62 presses the dust collecting rubber ring 72, thereby reducing the service life of the dust collecting rubber ring 72.

[0046] Based on this, the filter screen cover 81 is installed on the dust collecting baffle 76, so that dust and debris cannot enter the dust collecting rubber ring 72, and the dust and debris collected in the filter screen cover 81 are accumulated at the bottom of the filter screen cover 81, and when the dust collecting baffle 76 is turned and opened, the dust collecting baffle 76 supports the filter screen cover 81, and the accumulated dust and debris at the bottom of the filter screen cover 81 enter the dust collecting box 83 through the dust collecting frame 82, so that dust is collected, and the inner surface of the dust collecting rubber ring 72 is prevented from being worn by dust and debris.

[0047] Referring to Figure 2 The brush 74 is arranged in multiple rows, and each row of the brush 74 is located between adjacent collection holes 77.

[0048] It should be noted that each row of the brush 74 is located between adjacent collection holes 77, so that the dust between the brushes 74 and the dust at the roots of the brushes 74 can be absorbed by the dust collecting rubber ring 72, and the cleaning efficiency of the brush 74 is improved.

[0049] The dust collecting box 83 and the filter screen cover 81 are detachably installed on the dust collecting baffle 76, so that the filter screen cover 81 and the dust collecting box 83 can be cleaned by the worker during maintenance of the device, and the detachable installation can be achieved by thread connection and sliding groove connection, and the connection mode is prior art, and the present application will not be summarized.

[0050] The implementation principle of the present application is as follows:

[0051] In use, referring to Figure 5 The sliding block 4 moves to drive the scissor assembly 6 at one end of the sliding block 4 to be tightened, and the scissor assembly 6 at the other end of the sliding block 4 to be unfolded. ​ When the scissor assembly 6 is tightened, the scissor assembly 6 extrudes the dust collecting rubber ring 72, and the gas in the dust collecting rubber ring 72 supports the exhaust baffle 75 and flows out of the exhaust baffle 75, so that the dust collecting rubber ring 72 is gradually flattened; when the sliding block 4 moves reversely, the scissor assembly 6 is unfolded, and the scissor assembly 6 pulls the dust collecting rubber ring 72, so that the external gas enters the cleaning box 71 through the collection holes 77 and drives the dust collecting baffle 76 to be opened, so that the external gas enters the dust collecting rubber ring 72, and the dust collecting rubber ring 72 gradually returns to the original state, and in this process, the external gas sucks the dust and metal powder on the brush 74 into the cleaning box 71, so that the dust and metal powder on the brush 74 are self-cleaned, the cleaning ability of the brush 74 is improved, and the wear of the sliding rail 3 sliding groove caused by the dust and metal powder adhered to the brush 74 is avoided.

[0052] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A guide rail structure with a cleaning component, characterized in that: It includes a base plate (1), a slide rail (3) and a sliding block (4). The slide rail (3) is mounted on the base plate (1). The slide rail (3) and the sliding block (4) are slidably engaged. Mounting plates (2) are mounted at both ends of the slide rail (3). A scissor assembly (6) is mounted between the mounting plate (2) and the sliding block (4). A cleaning assembly (7) is mounted on the scissor assembly (6). The cleaning assembly (7) includes a cleaning box (71), a dust collection ring (72), and an exhaust port (73). The cleaning box (71) is installed in the groove of the slide rail (3). The dust collection ring (72) is connected to the scissor lift assembly (6). An exhaust port (73) is installed at the end of the dust collection ring (72) away from the slide rail (3). A brush (74) and a collection hole (77) are provided on the cleaning box (71). A one-way opening dust collection baffle (76) and an exhaust baffle (75) are installed on both the cleaning box (71) and the exhaust port (73). When the scissor lift assembly (6) tightens, it squeezes the dust collection ring (72), causing the exhaust baffle (75) to open and the dust collection baffle (76) to close. When the scissor lift assembly (6) unfolds, it pulls the dust collection ring (72), and external gas enters the cleaning box (71) through the collection hole (77), causing the dust collection baffle (76) to open and the exhaust baffle (75) to close. External gas enters the dust collection ring (72), sucking the dust and metal powder on the brush (74) into the cleaning box (71). The scissor lift assembly (6) includes several scissor lift sections (64), each scissor lift section (64) is composed of a connecting section (61) and a moving section (63), the connecting section (61) and the moving section (63) are rotatably connected, a compression ring (62) is installed on the connecting section (61), and the compression ring (62) is connected to the ash collection ring (72); The brushes (74) are arranged in multiple rows, with each row of brushes (74) located between adjacent collection holes (77); A collection assembly (8) is installed between the dust collection baffles (76). The collection assembly (8) includes a filter screen (81), and the dust collection baffles (76) are connected by the filter screen (81). The collection component (8) also includes a dust collection frame (82), the dust collection frame (82) is installed on the dust collection baffle (76), and the dust collection box (83) is installed at the bottom of the dust collection frame (82). The dust and debris accumulated at the bottom of the filter screen (81) can enter the dust collection box (83) through the dust collection frame (82) to collect the dust and avoid the dust and debris from wearing the inner surface of the dust collection rubber ring (72).

2. The guide rail structure with a cleaning component according to claim 1, characterized in that: The exhaust baffle (75) has a stop block 1 (751) installed at the end near the ash collecting ring (72), and the ash collecting baffle (76) has a stop block 2 (761) installed at the end away from the ash collecting ring (72). The stop block 1 (751) and the stop block 2 (761) are respectively connected to the exhaust baffle (75) and the ash collecting baffle (76) by springs (78).

3. The guide rail structure with a cleaning component according to claim 1, characterized in that: A bellows cover (5) is installed between the sliding block (4) and the mounting plate (2), and the bellows cover (5) is fitted onto the scissor lift assembly (6). The bellows cover (5) is connected to the rotating node on the scissor lift assembly (6). An installation hole (51) is opened on the bellows cover (5), and an exhaust port (73) passes through the installation hole (51).

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