Shield door with high safety and safety detection system thereof

Abstract

The high-safety shielding door and the safety detection system thereof are applied to the technical field of shielding door safety detection.The high-safety shielding door comprises a door frame, a left shielding door body and a right shielding door body are hinged to the interior of the door frame, a mounting frame is fixed to the top of the door frame, the mounting frame is provided with a left arc frame and a right arc frame, and the arc frames are fan-shaped; a rack is fixed to the sector position of each arc frame, a driving assembly and a lubricating assembly are arranged in the shell, the driving assembly and the racks are matched to drive the left shielding door and the right shielding door to move, the lubricating assembly is used for lubricating the racks, and the braking assembly is used for pausing and limiting movement of the left shielding door and the right shielding door. And the lubricating assembly comprises a first air cylinder fixed in the shell, the first driver is arranged on one side of the motor, a lubricating gun is fixed to the output end of the first driver, and the device can improve the use safety of the shielding door.

Description

Technical Field

[0001] The invention belongs to the technical field of safety detection of shielding doors, and in particular relates to a shielding door with high safety and a safety detection system thereof. Background Art

[0002] Large equipment may generate electromagnetic radiation during operation and testing, causing interference to surrounding electronic equipment and test instruments. Shielded doors can provide electromagnetic shielding function, reduce the leakage of electromagnetic radiation, and protect surrounding equipment and instruments from interference.

[0003] Large shielding rooms are used when testing large equipment, so large shielding doors are also needed. Since large shielding doors are heavy, the connection between the shielding door and the door frame is prone to wear and aging due to the large force, resulting in unstable opening and closing of the shielding door, which can easily affect the safety of the shielding door.

[0004] Therefore, it is necessary to provide a high-security shielding door and its safety detection system, which can monitor the opening and closing status of the shielding door when the shielding door is opened and closed, determine whether the shielding door connection is worn and aged, and improve the safety of the shielding door. Summary of the invention

[0005] The purpose of the present invention is to provide a high-safety shielding door and a safety detection system thereof for the existing material collection device, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-security shielding door and a safety detection system thereof, comprising a door frame, wherein a left shielding door and a right shielding door are respectively hinged inside the door frame, a mounting frame is fixed on the top of the door frame, and two groups of arc frames on the left and right of the mounting frame are fan-shaped, and a rack is fixed at the fan-shaped portion of each group of the arc frames, a shell is fixed on one side of the left shielding door and the right shielding door, and a driving component and a lubrication component are arranged inside the shell, wherein: The driving assembly cooperates with the rack to drive the left and right shielding doors to move, the lubricating assembly is used to lubricate the rack, and a brake assembly is provided outside the shell to suspend and restrict the movement of the left and right shielding doors; A visual unit is fixed at the bottom of the mounting frame; The lubrication assembly includes a first cylinder fixed in a shell, the first cylinder is arranged on one side of the motor, a lubrication gun is fixed to the output end of the first cylinder, lubricating oil is arranged inside the lubrication gun, a connecting sleeve is sleeved at the nozzle of the lubrication gun near the rack, the interior of the connecting sleeve is arranged as a cavity, a plurality of lubrication holes are opened on one side of the connecting sleeve, and a brush is fixed to the side of the connecting sleeve near the lubrication hole.

[0007] The present invention further illustrates that the brake assembly includes a second cylinder fixed outside the shell, a brake plate is fixed to the output end of the second cylinder, a rubber plate is fixed on the brake plate, and a rack is provided on the rubber plate to increase friction.

[0008] The present invention further illustrates that a controller is provided on one side of the door frame, the controller is provided with a buzzer, and three groups of distance sensors are provided near the hinge of the door frame.

[0009] The present invention further illustrates that the controller includes a shielding door safety detection and control system, the shielding door safety detection and control system includes a detection module and a control module, the detection module includes a distance recognition submodule, a speed analysis submodule and a safety judgment submodule, the distance recognition submodule is electrically connected to the distance sensor, the speed analysis submodule is electrically connected to the visual unit, the distance recognition submodule is used to analyze the distance between the hinge of the left shielding door and the right shielding door and the door frame, the speed analysis submodule is used to identify the moving speed of the left shielding door and the right shielding door, and the safety judgment submodule is used to judge the safety status of the shielding door and the right shielding door.

[0010] The present invention further illustrates that the control module includes a lubrication submodule, a braking submodule, an alarm submodule and a speed adjustment submodule, the lubrication submodule is electrically connected to the lubrication gun, the braking submodule is electrically connected to the second cylinder, the alarm submodule is electrically connected to the buzzer, the speed adjustment submodule is electrically connected to the motor, the lubrication submodule is used to lubricate the rack, the braking submodule is used to limit the movement of the left shielding door and the right shielding door, the alarm submodule is used to alarm, and the speed adjustment submodule is used to control the movement speed of the left shielding door and the right shielding door.

[0011] The present invention further illustrates that the shielding door safety detection and control system includes the following specific operation steps: Step 1: When the left and right shielding doors need to be opened, the motor is started to drive the gear to rotate and mesh with the rack, thereby driving the left and right shielding doors to rotate around the hinges with the door frames to realize the door opening action; Step 2: During the door opening process, the moving speed of the left and right shielding doors is determined by the visual unit, and whether there is a jamming phenomenon when the left and right shielding doors move; Step 3: During the door opening process, the distance between the hinges of the left and right shielding doors and the door frame is determined by the distance sensor to determine whether the hinges of the left and right shielding doors are aging and loose; Step 4: The aging and loosening phenomenon of the connection is combined with the jamming phenomenon of the left and right shielding doors when they move through the safety judgment submodule to analyze the safety situation of the left and right shielding doors when they move.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts a lubrication component, when rust occurs between the gear and the rack, the shielding door to be opened is driven to move in the reverse direction, the lubrication gun is controlled to start by the lubrication submodule, and the lubricating oil inside is pushed into the cavity when the shielding door moves in the reverse direction, and then applied to the rack by the brush, and then the first cylinder is started to shrink back and forth to drive the brush to move up and down, so that the rust and impurities on the rack can be wiped off, thereby ensuring the meshing degree between the rack and the gear; By setting up the brake assembly, after the shielding door and the right shielding door get stuck when moving, the distance sensor determines whether the hinges of the left shielding door and the right shielding door are aged and loose, which means that not only the left shielding door and the right shielding door get stuck when moving, but also there is a hidden danger of looseness at the hinges of the left shielding door and the right shielding door, which are easily affected by the jamming and directly loose at the hinges. At this time, the brake assembly is used to limit the support of the left shielding door and the right shielding door, and the motor is suspended at the same time, and the shielding door is suspended from continuing to run, and then the signal is transmitted to the alarm submodule to control the buzzer to sound, informing the surrounding people to stay away from the shielding door to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an overall front schematic diagram of the present invention; Figure 3 It is a top schematic diagram of the overall structure of the present invention; Figure 4 The present invention Figure 2 A local enlarged schematic diagram of area A; Figure 5 The present invention Figure 3 A local enlarged schematic diagram of area B; Figure 6 is a schematic diagram of a lubrication assembly of the present invention; Figure 7 is a schematic diagram of a brake plate of the present invention; Figure 8 It is a schematic diagram of the screen door safety detection and control system of the present invention; In the figure: 1. door frame; 2. left shielding door; 3. right shielding door; 4. mounting frame; 5. arc frame; 6. shell; 7. distance sensor; 8. controller; 9. rack; 10. buzzer; 11. second cylinder; 12. brake plate; 13. lubrication gun; 14. motor; 15. gear; 16. first cylinder; 17. connecting sleeve; 18. lubrication hole; 19. brush; 20. rubber plate; 21. cavity; 22. visual unit. DETAILED DESCRIPTION

[0014] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. 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.

[0015] See also Figure 1-8 The present invention provides a technical solution: a high-security shielding door and its safety detection system, comprising a door frame 1, wherein a left shielding door 2 and a right shielding door 3 are hingedly connected inside the door frame 1, a mounting frame 4 is fixed on the top of the door frame 1, and two groups of arc frames 5 on the left and right of the mounting frame 4 are fan-shaped. A rack 9 is fixed at the fan-shaped position of each group of arc frames 5, a shell 6 is fixed on one side of the left shielding door 2 and the right shielding door 3, a driving component and a lubrication component are arranged inside the shell 6, the driving component cooperates with the rack 9 to drive the left shielding door 2 and the right shielding door 3 to move, the lubrication component is used to lubricate the rack 9, and a braking component is arranged outside the shell 6, the braking component is used to pause and restrict the movement of the left shielding door 2 and the right shielding door 3.

[0016] A visual unit 22 is fixed at the bottom of the mounting frame 4 , and the visual unit 22 may be a camera.

[0017] The driving assembly includes a motor 14 fixed inside the housing 6. A gear 15 is fixed to the output end of the motor 14. The gear 15 cooperates with the rack 9. The starting motor 14 drives the left shielding door 2 and the right shielding door 3 to open and close through the cooperation of the gear 15 and the rack 9.

[0018] The lubrication assembly includes a first cylinder 16 fixed in the housing 6. The first cylinder 16 is arranged on one side of the motor 14. A lubrication gun 13 is fixed to the output end of the first cylinder 16. Lubricating oil is arranged inside the lubrication gun 13. A connecting sleeve 17 is sleeved at the nozzle of the lubrication gun 13 near the rack. The interior of the connecting sleeve 17 is arranged as a cavity 21. A plurality of lubrication holes 18 are opened on one side of the connecting sleeve 17. A brush 19 is fixed to one side of the connecting sleeve 17 near the lubrication hole 18. When the rack 9 needs to be lubricated, the lubrication gun 13 is started to drive the internal lubricating oil to be sprayed into the connecting sleeve 17 through the nozzle, and then flows into the brush 19 along the lubrication hole 18. The brush 19 is soaked to facilitate lubrication of the rack 9.

[0019] The brake assembly includes a second cylinder 11 fixed outside the housing 6, a brake plate 12 is fixed to the output end of the second cylinder 11, a rubber plate 20 is fixed to the brake plate 12, and a rack is provided on the rubber plate 20 to increase friction.

[0020] A controller 8 is provided on one side of the door frame 1 , and the controller 8 is provided with a buzzer 10 . Three groups of distance sensors 7 are provided near the hinge of the door frame 1 .

[0021] The controller 8 includes a shielding door safety detection and control system, which includes a detection module and a control module. The detection module includes a distance recognition submodule, a speed analysis submodule and a safety judgment submodule. The distance recognition submodule is electrically connected to the distance sensor 7, and the speed analysis submodule is electrically connected to the visual unit 22. The distance recognition submodule is used to analyze the distance between the hinge of the left shielding door 2 and the right shielding door 3 and the door frame 1. The speed analysis submodule is used to identify the moving speed of the left shielding door 2 and the right shielding door 3. The safety judgment submodule is used to judge the safety of the left shielding door 2 and the right shielding door 3.

[0022] The control module includes a lubrication submodule, a braking submodule, an alarm submodule and a speed adjustment submodule. The lubrication submodule is electrically connected to the lubrication gun 13, the braking submodule is electrically connected to the second cylinder 11, the alarm submodule is electrically connected to the buzzer 10, and the speed adjustment submodule is electrically connected to the motor 14. The lubrication submodule is used to lubricate the rack 9, the braking submodule is used to limit the movement of the left shielding door 2 and the right shielding door 3, the alarm submodule is used to alarm, and the speed adjustment submodule is used to control the movement speed of the left shielding door 2 and the right shielding door 3.

[0023] The shield door safety detection and control system includes the following specific operation steps: Step 1: When the left shielding door 2 and the right shielding door 3 need to be opened, the starting motor 14 drives the gear 15 to rotate and mesh with the rack 9, thereby driving the left shielding door 2 and the right shielding door 3 to rotate around the hinge with the door frame 1 to realize the door opening action; Step 2: During the door opening process, the moving speeds of the left and right shielding doors 2 and 3 are determined by the visual unit 22, and whether there is a jamming phenomenon when the left and right shielding doors 2 and 3 move; Specifically, in the process of the shielding door from closing to fully opening, the visual unit 22 transmits the moving status of the left shielding door 2 and the right shielding door 3 to the speed analysis submodule. When the speed analysis submodule recognizes that the moving speeds of the left shielding door 2 and the right shielding door 3 are uniform, it means that the meshing state between the gear 15 and the rack 9 is good. When it is recognized that the moving speeds of the left shielding door 2 and the right shielding door 3 suddenly decrease and then become uniform, it means that the left shielding door 2 and the right shielding door 3 are stuck when moving. When the left shielding door 2 and the right shielding door 3 gradually decrease when moving, it means that the meshing state between the gear 15 and the rack 9 is poor.

[0024] Step 3: During the door opening process, the distance between the hinges of the left and right shielding doors 2 and 3 and the door frame 1 is determined by the distance sensor 7 to determine whether the hinges of the left and right shielding doors 2 and 3 are aging and loose; Specifically, in the process from closing to fully opening of the door, the distance sensor 7 detects the distance between the hinge and the door frame 1 in real time, and transmits the signal to the distance recognition unit. When the distance between the hinge and the door frame 1 does not change during the opening and closing of the shielding door, it indicates that the hinges of the left shielding door 2 and the right shielding door 3 are not aging or loose. When the distance between the hinge and the door frame 1 changes during the opening and closing of the shielding door, it indicates that the hinges of the left shielding door 2 and the right shielding door 3 are aging or loose. Step 4: The aging and loosening phenomenon of the connection is combined with the jamming phenomenon of the left and right shielding doors 2 and 3 when they move through the safety judgment submodule to analyze the safety situation of the left and right shielding doors 2 and 3 when they move; Specifically, when there is no jamming phenomenon when the left and right platform doors 2 and 3 move, and there is no aging and loosening phenomenon at the hinges of the left and right platform doors 2 and 3, it means that the safety situation of the left and right platform doors 2 and 3 when moving is high; When the hinges of the left shielding door 2 and the right shielding door 3 are not aging and loose, but the left shielding door 2 and the right shielding door 3 are stuck when moving, it means that there may be rust between the gear 15 and the rack 9, rather than the jamming caused by the hinges not being aging and loose. At this time, the signal is transmitted to the motor 14 to control the motor 14 to reverse, so as to drive the shielding door to be opened to move in the opposite direction. The lubrication gun 13 is controlled to start through the lubrication submodule. When the shielding door moves in the opposite direction, the internal lubricating oil is pushed into the cavity 21, and then applied to the rack 9 through the brush 19. Then the first cylinder 16 is started to shrink back and forth to drive the brush 19 to move up and down, so that the rust and impurities on the rack 9 can be wiped off. , ensure the meshing degree between the rack 9 and the gear 15, and control the rotation speed of the motor 14 to slow down through the speed adjustment submodule, so that the meshing speed between the rack 9 and the gear 15 slows down, which can give the lubrication component sufficient lubrication and cleaning time to ensure the working quality of the lubrication component. When the shielding door moves in the opposite direction for a distance, the motor 14 is controlled to rotate forward to continue to drive the shielding door to open. Similarly, when the shielding door is opened, the lubrication component is still controlled to lubricate the rack 9, and the gear 15 follows the lubrication component. At this time, the rotation speed of the motor 14 is restored to normal through the speed adjustment submodule. Through this step, the stuck part can be lubricated back and forth to further reduce the stuck phenomenon.

[0025] It should be added that when the left and right shielding doors 2 and 3 are stuck during movement, and the control motor 14 is reversed to lubricate and clean the rack 9, the distance sensor 7 is used to continue to determine whether the hinges of the left and right shielding doors 2 and 3 are aging and loose. If the hinges of the left and right shielding doors 2 and 3 are aging and loose, it means that there is not only a stuck phenomenon when the left and right shielding doors 2 and 3 are moving, but there is a hidden danger of looseness at the hinges of the left and right shielding doors 2 and 3, which is easily affected by the stuck state and the hinges are directly loose. At this time, a signal is transmitted to the brake submodule to transmit a signal to the second cylinder 11 to extend, so that the rubber plate 20 is against the bottom surface of the arc frame 5, which plays a role in limiting the support of the left and right shielding doors 2 and 3, and at the same time, the motor 14 is stopped, the shielding doors are stopped from continuing to run, and then the signal is transmitted to the alarm submodule to control the buzzer 10 to sound, so as to inform the surrounding personnel to stay away from the shielding doors to ensure safety.

[0026] When the hinges of the left shielding door 2 and the right shielding door 3 are not loosened due to aging, but the meshing state of the gear 15 and the rack 9 is poor, the above-mentioned lubrication method is also used. First, the motor 14 is controlled to move in the reverse direction to drive the shielding door to return. When the motor 14 is controlled to move in the forward direction, the lubrication component lubricates the rack 9 in front of the gear 15 to facilitate better meshing of the rear gear 15 and the rack 9. At the same time, the moving speed of the shielding door continues to be detected through the visual unit 22. If the moving speed of the shielding door is uniform, it means that the lubrication works. If the moving speed of the shielding door remains the same, it means that the rust on the rack 9 is difficult to handle. At this time, the signal is transmitted to the alarm submodule, causing the buzzer to sound to remind the staff to come for maintenance.

[0027] When the hinges of the left shielding door 2 and the right shielding door 3 become loose due to aging, and the left shielding door 2 and the right shielding door 3 become stuck when moving, a signal is transmitted to the alarm submodule to inform the staff to deal with the hinges of the left shielding door 2 and the right shielding door 3. After the processing, the moving speed of the shielding door is analyzed again through the visual unit 22. If no stuck occurs, it means that the hinges of the left shielding door 2 and the right shielding door 3 are aged and loose, resulting in stuck. If stuck still occurs, repeat the above lubrication step. Through this step, the cause of the stuck of the shielding door can be determined, and targeted maintenance can be carried out to ensure the safety of the shielding door during use.

[0028] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-security shielding door, comprising a door frame (1), characterized in that: The door frame (1) is hinged with a left screen door (2) and a right screen door (3) inside, respectively; a mounting frame (4) is fixed on the top of the door frame (1); the mounting frame (4) has two groups of arc frames (5) on the left and right; the arc frames (5) are fan-shaped; a rack (9) is fixed at the fan-shaped portion of each group of arc frames (5); a housing (6) is fixed on one side of the left screen door (2) and the right screen door (3); a drive assembly and a lubrication assembly are arranged inside the housing (6), wherein: The driving assembly cooperates with the rack (9) to drive the left shielding door (2) and the right shielding door (3) to move, the lubrication assembly is used to lubricate the rack (9), and a brake assembly is provided outside the housing (6), the brake assembly is used to temporarily limit the movement of the left shielding door (2) and the right shielding door (3); A visual unit (22) is fixed to the bottom of the mounting frame (4); The lubrication assembly comprises a first cylinder (16) fixed in a housing (6), the first cylinder (16) being arranged on one side of the motor (14), a lubrication gun (13) being fixed at the output end of the first cylinder (16), lubricating oil being arranged inside the lubrication gun (13), a connecting sleeve (17) being sleeved at a nozzle near the rack of the lubrication gun (13), the interior of the connecting sleeve (17) being arranged as a cavity (21), a plurality of lubrication holes (18) being opened on one side of the connecting sleeve (17), and a brush (19) being fixed on one side of the connecting sleeve (17) near the lubrication holes (18); A controller (8) is provided on one side of the door frame (1).

2. A high-security shielding door according to claim 1, characterized in that: The brake assembly comprises a second cylinder (11) fixed outside the housing (6); a brake plate (12) is fixed to the output end of the second cylinder (11); a rubber plate (20) is fixed to the brake plate (12); and a rack is provided on the rubber plate (20) to increase friction.

3. The high-security shielding door according to claim 1, characterized in that: The controller (8) is provided with a buzzer (10), and the door frame (1) is provided with three groups of distance sensors (7) near the hinge.

4. A safety detection system for a high-security shielding door, using a high-security shielding door according to any one of claims 1 to 3, characterized in that: The controller (8) comprises a screen door safety detection and control system, the screen door safety detection and control system comprises a detection module and a control module, the detection module comprises a distance recognition submodule, a speed analysis submodule and a safety judgment submodule, the distance recognition submodule is electrically connected to the distance sensor (7), the speed analysis submodule is electrically connected to the visual unit (22), the distance recognition submodule is used to analyze the distance between the hinge of the left screen door (2) and the right screen door (3) and the door frame (1), the speed analysis submodule is used to identify the moving speed of the left screen door (2) and the right screen door (3), and the safety judgment submodule is used to judge the safety status of the screen door (2) and the right screen door (3).

5. A safety detection system for a shielded door with high safety according to claim 4, characterized in that: The control module comprises a lubrication submodule, a braking submodule, an alarm submodule and a speed adjustment submodule. The lubrication submodule is electrically connected to a lubrication gun (13), the braking submodule is electrically connected to a second cylinder (11), the alarm submodule is electrically connected to a buzzer (10), and the speed adjustment submodule is electrically connected to a motor (14). The lubrication submodule is used to lubricate the rack (9), the braking submodule is used to limit the movement of the left shielding door (2) and the right shielding door (3), the alarm submodule is used to give an alarm, and the speed adjustment submodule is used to control the movement speed of the left shielding door (2) and the right shielding door (3).

6. A safety detection system for a shielded door with high safety according to claim 5, characterized in that: The shield door safety detection and control system includes the following specific operation steps: Step 1: When the left shielding door (2) and the right shielding door (3) need to be opened, the motor (14) is started to drive the gear (15) to rotate and mesh with the rack (9), thereby driving the left shielding door (2) and the right shielding door (3) to rotate around the hinge with the door frame (1), thereby realizing the door opening action; Step 2: During the door opening process, the moving speeds of the left shielding door (2) and the right shielding door (3) are determined by the visual unit (22), and whether there is a jamming phenomenon when the left shielding door (2) and the right shielding door (3) are moving; Step 3: During the door opening process, the distance between the hinges of the left shielding door (2) and the right shielding door (3) and the door frame (1) is determined by using a distance sensor (7) to determine whether the hinges of the left shielding door (2) and the right shielding door (3) are aging or loose; Step 4: The aging and loosening of the connection is combined with the jamming of the left shielding door (2) and the right shielding door (3) when they are moving through the safety judgment submodule to analyze the safety situation of the left shielding door (2) and the right shielding door (3) when they are moving.

7. A safety detection system for a shielded door with high safety according to claim 6, characterized in that: Step 4 includes the following steps: When the left shielding door (2) and the right shielding door (3) move without any jamming, and the hinges of the left shielding door (2) and the right shielding door (3) do not become loose due to aging, it indicates that the safety of the left shielding door (2) and the right shielding door (3) when moving is at a high level.

8. A safety detection system for a shielded door with high safety according to claim 7, characterized in that: The step 4 also includes the following steps: When the hinges of the left shielding door (2) and the right shielding door (3) are not loose due to aging, but the left shielding door (2) and the right shielding door (3) are stuck when moving, it indicates that there may be rust between the gear (15) and the rack (9), rather than the jamming caused by the hinges not being loose due to aging. At this time, a signal is transmitted to the motor (14) to control the motor (14) to reverse, drive the shielding door to be opened to move in the opposite direction, and control the lubrication gun (13) to start through the lubrication submodule. When the shielding door moves in the opposite direction, the lubricating oil inside is pushed into the cavity (21), and then applied to the rack (9) through the brush (19). Then the first cylinder (16) is started to retract back and forth to drive the brush (19) to move up and down, so that the rust and impurities on the rack (9) can be wiped off, ensuring the meshing degree between the rack (9) and the gear (15).

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