Intelligent monitoring device for compressor assembly production

Abstract

The utility model relates to the field of compressor assembly production, in particular to an intelligent monitoring device for compressor assembly production, which comprises a bottom plate, a support seat, a detection mechanism and a collection mechanism, the support seat is fixedly mounted at the top of the bottom plate, and the detection mechanism is fixedly mounted at the top of the support seat. The detection mechanism is used for monitoring the oil leakage amount of the compressor piston rod in real time, the collection mechanism is located at the top of the bottom plate and used for collecting and storing oil stored in the detection mechanism, the box body is fixedly installed at the top of the supporting seat, and the cleaning mechanism is located on the inner side of the box body and used for cleaning oil stains on the inner wall of the box body. According to the intelligent monitoring device for compressor assembly production, the oil leakage amount of the piston rod is monitored through the detection mechanism, oil in the box body can be automatically discharged, oil stains on the inner wall of the box body can be automatically cleaned, then the intelligence of the monitoring device is improved, and the labor force of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of compressor component production, and particularly relates to an intelligent monitoring device for compressor component production. Background Technique

[0002] A compressor is a fluid machine that lifts low-pressure gas to high-pressure gas, and it has a wide range of applications in industries, agriculture, transportation, medical and health fields, etc. Compressor components are the various parts that make up a compressor. Different types of compressor components are different, but usually include components such as cylinders, pistons, piston rods, and air valves.

[0003] After retrieval, the Chinese patent publication number: CN220487825U discloses a monitoring device for oil leakage of a compressor piston rod. By threadedly connecting a threaded connecting rod with a threaded through hole, using the threaded connecting rod to press a sealing cover plate downward, under the pressure of the sealing cover plate, the oil in the collection box is discharged through an oil discharge channel. During the downward movement of the sealing cover plate, the inner wall of the collection box can be cleaned, and there is no need for manual cleaning again, reducing the labor force and improving the work efficiency.

[0004] However, during the use of the above device, it is necessary for the staff to manually rotate the threaded connecting rod multiple times so that the threaded connecting rod can be connected with the threaded through hole in order to clean the oil stain in the collection box. At the same time, when disassembling the threaded connecting rod, the staff also needs to rotate the threaded connecting rod in the reverse direction multiple times, which leads to an increase in the labor force of the staff and reduces the work efficiency and use effect of the monitoring device. Content of the Utility Model

[0005] The purpose of the utility model is to provide an intelligent monitoring device for compressor component production.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provide an intelligent monitoring device for compressor component production, including a bottom plate, a support seat, a detection mechanism, and a collection mechanism. The support seat is fixedly installed on the top of the bottom plate, the detection mechanism is fixedly installed on the top of the support seat, the detection mechanism is used for real-time monitoring of the oil leakage amount of the compressor piston rod, the collection mechanism is located on the top of the bottom plate, and the collection mechanism is used for collecting and storing the oil stored in the detection mechanism. The detection mechanism includes a box body, a switching mechanism, and a cleaning mechanism. The box body is fixedly installed on the top of the support seat, the cleaning mechanism is located inside the box body, and the cleaning mechanism is used for cleaning the oil stain on the inner wall of the box body. The cleaning mechanism includes a cylindrical rod, a connecting rod, a hinged rod, and a cleaning rod. The cleaning rod is slidably connected inside the box body, the hinged rod is hinged to the top of the cleaning rod, the connecting rod is hinged to the top end of the hinged rod, the cylindrical rod is fixedly installed at the top end of the connecting rod, and the cylindrical rod penetrates and is rotatably connected to the outer wall of the box body.

[0008] Furthermore, the detection mechanism further includes an inlet pipe, a box cover, a control panel, an outlet pipe and a liquid level sensor. One end of the inlet pipe is fixedly installed on the inner side of the top of the box cover, the box cover is fixedly installed on the top of the box body, the control panel is fixedly installed on the front of the box body, the top end of the outlet pipe is fixedly installed on the inner side of the bottom of the box body, the outlet pipe penetrates through the top inner wall of the support base, and the top end of the liquid level sensor penetrates and is fixedly connected to the top inner wall of the box cover. The liquid level sensor is electrically connected to the control panel.

[0009] Furthermore, the switch mechanism includes a connecting column, a lower ball head, an upper ball head, a fixing plate, a guiding column, a spring, a circular magnet and an electromagnet. The lower ball head is fixedly installed at the bottom end of the connecting column, the upper ball head is fixedly installed at the top end of the connecting column, the fixing plate is fixedly installed at one end of the outer wall of the connecting column close to the upper ball head, the guiding column is fixedly installed on the top of the fixing plate, the circular magnet is fixedly installed on the top of the guiding column, the electromagnet is fixedly installed on the bottom inner wall of the box cover, one end of the spring is fixedly connected to the top of the fixing plate, and the other end of the spring is fixedly connected to the bottom of the box cover.

[0010] Furthermore, the electromagnet is magnetically connected to the circular magnet, the electromagnet is electrically connected to the control panel, the circular magnet is slidably connected to the bottom inner wall of the box cover, and the guiding column is slidably connected to the bottom inner wall of the box cover.

[0011] Furthermore, the cutting and collecting mechanism includes a collecting box, a snap ring, a pipe joint, a sealing gasket, a return spring and a clamping post. The bottom of the collecting box is in contact with the top of the bottom plate, the snap ring is fixedly installed on the top of the collecting box, the inner side of the pipe joint is fixedly connected to the bottom end of the outlet pipe, the sealing gasket is fixedly installed on the inner side of the snap ring, one end of the return spring is on the inner side of the left end of the pipe joint, and the other end of the return spring is fixedly installed on the outer wall of the clamping post.

[0012] Furthermore, the outer wall of the pipe joint is inserted into the inner side of the snap ring, a card slot is opened at the left end of the snap ring, the outer wall of the clamping post is slidably connected to the inner side of the left end of the pipe joint, and the outer wall of the clamping post is clamped to the inner side of the card slot.

[0013] Furthermore, the cleaning mechanism further includes a rack, an electric push rod, a gear and a housing. The housing is fixedly installed on the left side of the box body, the electric push rod is fixedly installed inside the housing, the output end of the electric push rod is fixedly connected to the outer wall of the rack, the rack is meshed with the gear, the outer wall of the gear is fixedly connected to the outer wall of the cylindrical rod, and the electric push rod is electrically connected to the control panel.

[0014] Advantages of the present utility model: For the intelligent monitoring device used in the production of the compressor assembly, the oil quantity data in the box body is transmitted to the control panel in real time through the liquid level sensor arranged on the detection mechanism, and the real-time oil quantity is displayed through the control panel, which is convenient for the staff to observe and monitor the oil leakage of the piston rod. Moreover, the control panel can control the switching mechanism and the cleaning mechanism to realize the automatic discharge of the oil inside the box body and the automatic cleaning of the oil stains on the inner wall of the box body, thereby improving the intelligence of the monitoring device, reducing the labor force of the staff. At the same time, the oil discharged from the box body is collected and stored through the collection mechanism for subsequent processing by the staff, improving the use effect and working efficiency of the monitoring device. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the attached drawings required for use in the embodiments of the present utility model will be briefly introduced below.

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 2 It is a front view structure schematic diagram of the present utility model;

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the box body;

[0019] Figure 4 It is a split structure schematic diagram of the detection mechanism;

[0020] Figure 5 It is a sectional view structure schematic diagram of the box body and the box cover;

[0021] Figure 6 It is a three-dimensional structure schematic diagram of the cleaning mechanism;

[0022] Figure 7 It is a split structure schematic diagram of the collection mechanism.

[0023] In the figure: 1, bottom plate; 2, support seat; 3, detection mechanism; 31, box body; 32, oil inlet pipe; 33, box cover; 34, control panel; 35, oil outlet pipe; 36, liquid level sensor; 37, switching mechanism; 371, connecting column; 372, lower ball head; 373, upper ball head; 374, fixing plate; 375, guiding column; 376, spring; 377, circular magnet; 378, electromagnet; 38, cleaning mechanism; 381, rack; 382, electric push rod; 383, gear; 384, cylindrical rod; 385, connecting rod; 386, articulated rod; 387, cleaning rod; 388, housing; 4, collection mechanism; 41, collection box; 42, snap ring; 43, pipe joint; 44, sealing gasket; 45, return spring; 46, clamping post. Detailed Embodiments

[0024] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0025] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] Referring to Figures 1 to 2 , an intelligent monitoring device for the production of a compressor assembly is shown, including a bottom plate 1, a support base 2, a detection mechanism 3 and a collection mechanism 4. The support base 2 is fixedly installed on the top of the bottom plate 1, and the bottom plate 1 and the support base 2 play a supporting role for the box body 31 and the collection box 41. The detection mechanism 3 is fixedly installed on the top of the support base 2. The detection mechanism 3 is used to monitor the oil leakage amount of the compressor piston rod in real time. Through the oil amount data detected by the detection mechanism 3, it is convenient for the staff to screen out unqualified piston rod assemblies. The collection mechanism 4 is located on the top of the bottom plate 1. The collection mechanism 4 is used to collect and store the oil stored in the detection mechanism 3, so that the staff can perform subsequent processing work on the collected oil.

[0027] Referring to Figures 4 to 6 , the detection mechanism 3 includes a box body 31, a switch mechanism 37 and a cleaning mechanism 38. The box body 31 is fixedly installed on the top of the support base 2. The box body 31 is used to store the oil leaked from the compressor piston rod to be monitored for real-time monitoring. The cleaning mechanism 38 is located inside the box body 31. The cleaning mechanism 38 is used to clean the oil stains on the inner wall of the box body 31. The cleaning mechanism 38 includes a cylindrical rod 384, a connecting rod 385, a hinged rod 386 and a cleaning rod 387. The cleaning rod 387 is slidably connected inside the box body 31. The cleaning rod 387 is rectangular. Through the sliding effect of the cleaning rod 387, the oil stains attached to the inner wall of the box body 31 are scraped and cleaned. The hinged rod 386 is hinged to the top of the cleaning rod 387. There are two groups of symmetrically distributed hinged rods 386. Through the moving effect of the hinged rod 386, the cleaning rod 387 is driven to slide vertically. The connecting rod 385 is hinged to the top end of the hinged rod 386. There are two groups of symmetrically distributed connecting rods 385. Through the rotating effect of the connecting rod 385, the hinged rod 386 is driven to move. The cylindrical rod 384 is fixedly installed at the top end of the connecting rod 385. The cylindrical rod 384 penetrates and is rotatably connected to the outer wall of the box body 31. There are two groups of symmetrically distributed cylindrical rods 384. Through the rotating effect of the cylindrical rod 384, the connecting rod 385 is driven to rotate.

[0028] Referring to Figures 2 to 4, the detection mechanism 3 further includes an inlet pipe 32, a box cover 33, a control panel 34, an outlet pipe 35 and a liquid level sensor 36. One end of the inlet pipe 32 is fixedly installed on the inner side of the top of the box cover 33. Both the inlet pipe 32 and the outlet pipe 35 are flexible hoses. The other end of the inlet pipe 32 is externally connected to the oil leakage port of the compressor piston rod to be detected, so as to convey the oil leaked from the compressor piston rod to be detected into the box body 31. The box cover 33 is fixedly installed on the top of the box body 31. The control panel 34 is fixedly installed on the front of the box body 31. A PLC controller is arranged in the control panel 34. The input signals such as buttons and switches on the control panel 34 are connected to the digital input ports of the PLC through hard wiring. The PLC can execute corresponding logic control according to the states of the input signals, and at the same time can control the switch according to the set time, so that the staff can detect the oil leakage amount of the compressor piston rod per unit time, and automatically control the actions of the switch mechanism 37 and the cleaning mechanism 38. The top end of the outlet pipe 35 is fixedly installed on the inner side of the bottom of the box body 31. By opening the outlet pipe 35, the oil in the box body 31 can be conveyed into the collection box 41. The outlet pipe 35 penetrates through the top inner wall of the support seat 2. The top end of the liquid level sensor 36 penetrates through and is fixedly connected to the top inner wall of the box cover 33. Through the liquid level sensor 36, the liquid level position in the box body 31 is detected, so as to calculate the oil amount in the box body 31. The liquid level sensor 36 is electrically connected to the control panel 34. The liquid level sensor 36 is connected to the corresponding communication port on the control panel 34 through a communication cable to achieve digital connection, so that the liquid level sensor 36 can transmit the oil amount data in the box body 31 to the control panel 34 in real time for the staff to monitor.

[0029] Refer to Figure 4 and Figure 5, the switch mechanism 37 includes a connecting column 371, a lower ball head 372, an upper ball head 373, a fixing plate 374, a guiding column 375, a spring 376, a circular magnet 377 and an electromagnet 378. The lower ball head 372 is fixedly installed at the bottom end of the connecting column 371. The diameter of the lower ball head 372 is larger than the aperture of the oil outlet pipe 35. By moving the connecting column 371 downward, the lower ball head 372 can block the oil outlet pipe 35, thereby opening the oil inlet pipe 32. The upper ball head 373 is fixedly installed at the top end of the connecting column 371. The diameter of the upper ball head 373 is larger than the aperture of the oil inlet pipe 32. By moving the connecting column 371 upward, the upper ball head 373 can block the oil inlet pipe 32, thereby opening the oil outlet pipe 35. The fixing plate 374 is fixedly installed at one end of the outer wall of the connecting column 371 close to the upper ball head 373. Through the moving effect of the fixing plate 374, the connecting column 371 is driven to move. The guiding column 375 is fixedly installed at the top of the fixing plate 374. There are two groups of guiding columns 375 symmetrically distributed. Through the moving effect of the guiding columns 375, the fixing plate 374 is driven to move. The circular magnet 377 is fixedly installed at the top of the guiding column 375. There are two groups of circular magnets 377 symmetrically distributed. The electromagnet 378 is fixedly installed on the bottom inner wall of the box cover 33. There are two groups of electromagnets 378 symmetrically distributed. One end of the spring 376 is fixedly connected to the top of the fixing plate 374, and the other end of the spring 376 is fixedly connected to the bottom of the box cover 33. Through the elastic force of the spring 376, the fixing plate 374 always moves downward without external force, thereby driving the connecting column 371 to move downward and blocking the oil outlet pipe 35.

[0030] Referring to Figure 5 , the electromagnet 378 is magnetically connected to the circular magnet 377. The electromagnet 378 can adsorb the circular magnet 377, so that the circular magnet 377 can slide upward along the bottom inner wall of the box cover 33. The electromagnet 378 is electrically connected to the control panel 34. Connect the power cord of the electromagnet 378 to the power supply of the control panel 34. Lead a wire from the relay output contact of the PLC and connect it to the other end of the electromagnet 378. When the relay of the PLC is closed, the electromagnet 378 is powered on to work, realizing the control panel 34 to control the opening or closing of the electromagnet 378, so that the electromagnet 378 can adsorb the circular magnet 377 or release the adsorption state. The circular magnet 377 is slidably connected to the bottom inner wall of the box cover 33. Through the sliding effect of the circular magnet 377, the guiding column 375 is driven to slide vertically. The guiding column 375 is slidably connected to the bottom inner wall of the box cover 33.

[0031] Referring to Figure 2 and Figure 7, the collection mechanism 4 includes a collection box 41, a snap ring 42, a pipe joint 43, a sealing gasket 44, a return spring 45, and a clamping post 46. The bottom of the collection box 41 contacts the top of the bottom plate 1. The snap ring 42 is fixedly installed on the top of the collection box 41. Through the fixing effect of the snap ring 42, the snap ring 42 is prevented from falling off. The inner side of the pipe joint 43 is fixedly connected to the bottom end of the oil outlet pipe 35. Through the fixing effect of the pipe joint 43, the pipe joint 43 is prevented from falling off. The sealing gasket 44 is fixedly installed inside the snap ring 42. Through the insertion effect of the pipe joint 43 and the snap ring 42, the sealing gasket 44 can be squeezed, causing the sealing gasket 44 to expand and deform, thereby sealing the gap between the snap ring 42 and the pipe joint 43. One end of the return spring 45 is on the inner side of the left end of the pipe joint 43, and the other end of the return spring 45 is fixedly installed on the outer wall of the clamping post 46. The return spring 45 and the clamping post 46 are both symmetrically distributed in two groups. Through the elastic force of the return spring 45, the clamping post 46 always maintains the clamping effect with the card slot without external force, thereby limiting the pipe joint 43 and the snap ring 42.

[0032] Refer to Figure 7 , the outer wall of the pipe joint 43 is inserted into the inner side of the snap ring 42. When the pipe joint 43 is inserted into the snap ring 42, the oil in the oil outlet pipe 35 can be transported into the collection box 41. Two groups of card slots are symmetrically arranged at the left end of the snap ring 42. The outer wall of the clamping post 46 is slidably connected to the inner side of the left end of the pipe joint 43. Through the sliding effect of the clamping post 46, the clamping post 46 is engaged or disengaged with the card slot, and the outer wall of the clamping post 46 is engaged with the inner side of the card slot.

[0033] Refer to Figures 1 to 4 , the cleaning mechanism 38 further includes a rack 381, an electric push rod 382, a gear 383, and a housing 388. The housing 388 is fixedly installed on the left side of the box body 31. The housing 388 is symmetrically distributed in two groups. The electric push rod 382 is fixedly installed inside the housing 388. The electric push rod 382 is symmetrically distributed in two groups. The output end of the electric push rod 382 is fixedly connected to the outer wall of the rack 381. By starting the electric push rod 382, the rack 381 can be driven to move. The rack 381 meshes with the gear 383. The rack 381 and the gear 383 are both symmetrically distributed in two groups. Through the moving effect of the rack 381, the gear 383 can be driven to rotate. The outer wall of the gear 383 is fixedly connected to the outer wall of the cylindrical rod 384. Through the rotating effect of the gear 383, the cylindrical rod 384 is driven to rotate. The electric push rod 382 is electrically connected to the control panel 34. Connect the power cord of the electric push rod 382 to the power supply of a control panel 34, and at the same time connect the forward and reverse control signal lines of the electric push rod 382 to the digital output ports of the PLC. The electric push rod 382 can be controlled to be turned on and off through the control panel 34.

[0034] The intelligent monitoring device for the production of the compressor assembly transmits the oil quantity data in the box to the control panel in real time through the liquid level sensor arranged on the detection mechanism, and displays the real-time oil quantity through the control panel, facilitating the staff to observe and monitor the oil leakage of the piston rod. Moreover, the control panel can control the switching mechanism and the cleaning mechanism to realize the automatic discharge of the oil inside the box and the automatic cleaning of the oil stains on the inner wall of the box, thereby improving the intelligence of the monitoring device, reducing the labor of the staff. At the same time, the oil discharged from the box is collected and stored through the collection mechanism for the subsequent treatment by the staff, improving the use effect and working efficiency of the monitoring device.

[0035] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. An intelligent monitoring device for the production of a compressor assembly, characterized in that It includes a bottom plate (1), a support base (2), a detection mechanism (3) and a collection mechanism (4). The support base (2) is fixedly installed on the top of the bottom plate (1), the detection mechanism (3) is fixedly installed on the top of the support base (2), the detection mechanism (3) is used for real-time monitoring of the oil leakage amount of the compressor piston rod, the collection mechanism (4) is located on the top of the bottom plate (1), and the collection mechanism (4) is used for collecting and storing the oil stored in the detection mechanism (3). The detection mechanism (3) includes a box body (31), a switch mechanism (37) and a cleaning mechanism (38). The box body (31) is fixedly installed on the top of the support base (2), the cleaning mechanism (38) is located inside the box body (31), and the cleaning mechanism (38) is used for cleaning the oil stains on the inner wall of the box body (31). The cleaning mechanism (38) includes a cylindrical rod (384), a connecting rod (385), a hinged rod (386) and a cleaning rod (387). The cleaning rod (387) is slidably connected inside the box body (31), the hinged rod (386) is hinged to the top of the cleaning rod (387), the connecting rod (385) is hinged to the top end of the hinged rod (386), the cylindrical rod (384) is fixedly installed at the top end of the connecting rod (385), and the cylindrical rod (384) penetrates and is rotatably connected to the outer wall of the box body (31).

2. The intelligent monitoring device for the production of a compressor assembly according to claim 1, characterized in that, The detection mechanism (3) further includes an oil inlet pipe (32), a box cover (33), a control panel (34), an oil outlet pipe (35) and a liquid level sensor (36). One end of the oil inlet pipe (32) is fixedly installed on the inner side of the top of the box cover (33), the box cover (33) is fixedly installed on the top of the box body (31), the control panel (34) is fixedly installed on the front of the box body (31), the top end of the oil outlet pipe (35) is fixedly installed on the inner side of the bottom of the box body (31), the oil outlet pipe (35) penetrates the inner wall of the top of the support base (2), and the top end of the liquid level sensor (36) penetrates and is fixedly connected to the inner wall of the top of the box cover (33). The liquid level sensor (36) is electrically connected to the control panel (34).

3. An intelligent monitoring device for the production of a compressor assembly according to claim 1, characterized in that, The switch mechanism (37) includes a connecting column (371), a lower ball head (372), an upper ball head (373), a fixing plate (374), a guiding column (375), a spring (376), a circular magnet (377) and an electromagnet (378). The lower ball head (372) is fixedly installed at the bottom end of the connecting column (371), the upper ball head (373) is fixedly installed at the top end of the connecting column (371), the fixing plate (374) is fixedly installed at one end of the outer wall of the connecting column (371) near the upper ball head (373), the guiding column (375) is fixedly installed on the top of the fixing plate (374), the circular magnet (377) is fixedly installed on the top of the guiding column (375), the electromagnet (378) is fixedly installed on the inner wall of the bottom of the box cover (33), one end of the spring (376) is fixedly connected to the top of the fixing plate (374), and the other end of the spring (376) is fixedly connected to the bottom of the box cover (33).

4. The intelligent monitoring device for the production of a compressor assembly according to claim 3, characterized in that, The electromagnet (378) is magnetically connected to the circular magnet (377). The electromagnet (378) is electrically connected to the control panel (34). The circular magnet (377) is slidably connected to the bottom inner wall of the box cover (33), and the guide post (375) is slidably connected to the bottom inner wall of the box cover (33).

5. An intelligent monitoring device for the production of a compressor assembly according to claim 1, characterized in that, The collection mechanism (4) includes a collection box (41), a snap ring (42), a pipe joint (43), a sealing gasket (44), a return spring (45) and a snap post (46). The bottom of the collection box (41) contacts the top of the bottom plate (1). The snap ring (42) is fixedly installed on the top of the collection box (41). The inner side of the pipe joint (43) is fixedly connected to the bottom end of the oil outlet pipe (35). The sealing gasket (44) is fixedly installed inside the snap ring (42). One end of the return spring (45) is on the inner side of the left end of the pipe joint (43), and the other end of the return spring (45) is fixedly installed on the outer wall of the snap post (46).

6. The intelligent monitoring device for the production of a compressor assembly according to claim 5, characterized in that, The outer wall of the pipe joint (43) is inserted into the inner side of the snap ring (42). A card slot is formed at the left end of the snap ring (42). The outer wall of the snap post (46) is slidably connected to the inner side of the left end of the pipe joint (43), and the outer wall of the snap post (46) is clamped with the inner side of the card slot.

7. An intelligent monitoring device for the production of a compressor assembly according to claim 1, characterized in that, The cleaning mechanism (38) further includes a rack (381), an electric push rod (382), a gear (383) and a housing (388). The housing (388) is fixedly installed on the left side of the box body (31). The electric push rod (382) is fixedly installed inside the housing (388). The output end of the electric push rod (382) is fixedly connected to the outer wall of the rack (381). The rack (381) meshes with the gear (383). The outer wall of the gear (383) is fixedly connected to the outer wall of the cylindrical rod (384). The electric push rod (382) is electrically connected to the control panel (34).

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