A silicon nitride ceramic bearing blank granule pressing machine

Abstract

The present invention discloses a silicon nitride ceramic bearing blank pressing machine, belonging to the field of ceramic processing, which includes a processing table, a drying plate and a fixing mechanism arranged on the side of the processing table. The drying plate is attached to the front end of the processing table, and the fixing mechanism includes a transmission component and a fixing component; the transmission component includes a sliding rod, a first connecting plate, a turntable and a fixing plate. By setting a second push plate, since the second push plate is inclined, when the connecting block descends, the right side of the second push plate will move downward, and gradually align to apply a thrust to the right side of the force receiving plate. The second moving rod will move to the right accordingly. Because the second moving rod is embedded in the inside of the swing plate, the swing plate will swing through the movement of the second moving rod and drive the transmission rod to slide inside the control plate. When the transmission rod slides, it will apply a downward thrust to the control plate, causing the control plate to drive the protective cover fixedly connected to itself to descend and cover the pressing machine main body, achieving the purpose of dust prevention.

Description

Technical Field

[0001] The invention relates to the field of ceramic processing, and in particular to a silicon nitride ceramic bearing blank pressing machine. Background Art

[0002] Ceramics is a general term for pottery and porcelain, and is also a kind of arts and crafts in my country. As early as the Neolithic Age, my country already had rough and simple painted pottery and black pottery. Porcelain is made of clay, feldspar and quartz. It is translucent, non-absorbent, corrosion-resistant, hard and compact, and makes a crisp sound when tapped. my country's traditional ceramic arts and crafts are of high quality, beautiful shape, and have high artistic value, and are famous all over the world.

[0003] Ceramic bearings require a press when they are processed. However, many presses currently do not have a dust-proof function when in use, which results in a lot of dust if not used for a period of time. After the workpiece is processed, it is necessary to manually remove the material from under the processing head, which poses a safety hazard. For this reason, we propose a silicon nitride ceramic bearing blank press. Summary of the invention

[0004] The purpose of the present invention is to provide a silicon nitride ceramic bearing blank pressing machine to solve the problem mentioned in the above background technology that many current pressing machines do not have a dust-proof function when in use, resulting in a lot of dust being contaminated if not used for a period of time, and after the workpiece is processed, it is necessary to manually remove the material from under the processing head, which poses a safety hazard.

[0005] The present invention is implemented as follows: a silicon nitride ceramic bearing blank pressing machine comprises a processing table, a drying plate and a fixing mechanism arranged on the side of the processing table, the drying plate is attached to the front end of the processing table, and the fixing mechanism comprises a transmission component and a fixing component;

[0006] The transmission assembly includes a slide bar, a first connecting plate, a turntable and a fixed plate, the slide bar is slidably connected to the side of the processing table, the surface of the slide bar is slidably connected to the first connecting plate, the top of the first connecting plate is fixedly connected to the turntable, and the surface of the turntable is fixedly connected to the fixed plate;

[0007] The fixing assembly comprises a plug plate and a spring, wherein the spring is fixedly connected to the side of the processing table, and the tail of the spring is fixedly connected to a telescopic plate.

[0008] A telescopic plate is fixedly connected to the surface of the processing table, a protective cover is fixedly connected to the top of the telescopic plate, a pressing machine body is arranged on the side of the protective cover located on the surface of the processing table, a first push plate is slidably connected to the side of the pressing machine body located on the surface of the processing table, a transmission mechanism is arranged on the side of the first push plate located on the surface of the processing table, and a control mechanism is arranged on the back of the pressing machine body located on the surface of the processing table.

[0009] Preferably, the first connecting plate is arranged on the vertical center axis of the turntable, the sliding rod is embedded in the vertical slideway inside the first connecting plate and is slidably connected thereto, and the turntable drives the fixed plate through the sliding rod to form a swinging structure.

[0010] Preferably, a plug hole matching the size of the plug plate is provided on the right side of the drying plate, the fixing plate is in close contact with the plug plate, and the springs are evenly distributed in three groups in a straight line on the surface of the plug plate.

[0011] Preferably, the transmission mechanism includes a first hydraulic rod, a push block, a second connecting plate, a disc, a rotating plate, a first moving rod, a limit plate and a movable plate, the first hydraulic rod is fixedly connected to the surface of the processing table, the output end of the first hydraulic rod is fixedly connected to the push block, the surface of the push block is rotatably connected to the second connecting plate, the surface of the second connecting plate is rotatably connected to the disc, the side of the disc is fixedly connected to the rotating plate, the surface of the rotating plate is fixedly connected to the first moving rod, the surface of the first moving rod is slidably connected to the limit plate, and the surface of the limit plate is rotatably connected to the movable plate.

[0012] Preferably, the second connecting plate is arranged obliquely with respect to the surface of the push block, the junction between the second connecting plate and the disc deviates from the center of the disc, and the disc forms a rotating structure through the second connecting plate.

[0013] Preferably, first movement rods are provided at both left and right end points of the rotating plate, the first movement rods are embedded in the vertical slide groove on the surface of the limiting plate and are slidably connected thereto, and the tail of the movable plate is rotationally connected to the first push plate.

[0014] Preferably, the control mechanism includes a second hydraulic rod, a connecting block, a second push plate, a force plate, a second moving rod, a swing plate, a transmission rod and a control plate, the second hydraulic rod is fixedly connected to the surface of the processing table, the output end of the second hydraulic rod is fixedly connected to the connecting block, the surface of the connecting block is rotatably connected to the second push plate, the surface of the second push plate is rotatably connected to the force plate, the surface of the force plate is fixedly connected to the second moving rod, the surface of the second moving rod is slidably connected to the swing plate, the surface of the swing plate is fixedly connected to the transmission rod, and the surface of the transmission rod is slidably connected to the control plate.

[0015] Preferably, the connection points between the second push plate, the force-bearing plate and the connecting block are all located at their own end points, the force-bearing plate forms a sliding structure through the second push plate, and the transmission rod is set away from the rotation point of the swing plate.

[0016] Preferably, the control panel is fixedly connected to the protective cover, and a transverse slideway matching the size of the transmission rod is provided on the surface of the control panel. The control panel drives the protective cover through the transmission rod to form a lifting structure.

[0017] The present invention provides a silicon nitride ceramic bearing blank pressing machine, which, when used, has the following features:

[0018] Beneficial effects:

[0019] 1. A silicon nitride ceramic bearing blank pressing machine is provided with a second push plate. Since the second push plate is inclined, the lowering of the connecting block will cause the right side of the second push plate to move downward, and gradually align the force-bearing plate to apply a thrust to the right, and the second moving rod will move to the right accordingly. Since the second moving rod is embedded in the interior of the swing plate, the swing plate will swing through the movement of the second moving rod, and drive the transmission rod to slide inside the control plate. When the transmission rod slides, it will apply a thrust downward to the control plate, so that the control plate drives the protective cover fixedly connected to itself to descend, covering the main body of the pressing machine, thereby achieving the purpose of dust prevention.

[0020] 2. This silicon nitride ceramic bearing blank pressing machine is equipped with a second connecting plate. When the first push plate needs to be returned to its original position, the first hydraulic rod is opened, and then the first hydraulic rod applies a thrust to the right to the second connecting plate. Because the second connecting plate is set away from the center of the disc, when it moves, it will pull the disc to rotate clockwise, and the first moving rod will move accordingly.

[0021] 3. This silicon nitride ceramic bearing blank pressing machine is equipped with a first moving rod. Because the first moving rod is embedded in the vertical slide groove of the limit plate, when the first moving rod rotates, it will push the two groups of limit plates away from each other and drive the two groups of movable plates to gradually tilt. Since the tail of the movable plate is rotationally connected to the first push plate, when the movable plate moves, it will pull the first push plate, so that the first push plate moves to the left along the processing table and returns to the initial position.

[0022] 4. This silicon nitride ceramic bearing blank pressing machine is equipped with a first connecting plate. Because the first connecting plate is arranged on the vertical center axis of the turntable, when the first connecting plate is pushed by the sliding rod, it will drive the turntable to rotate. When the turntable rotates, it will drive the fixed plate to rotate synchronously and break away from the contact with the plug plate. Then, the plug plate will pop out of the drying plate under the action of three sets of springs, and finally the drying plate can be disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0024] Figure 1 It is a front structural schematic diagram of the present invention;

[0025] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0026] Figure 3 It is a side structural schematic diagram of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the control mechanism of the present invention from a first viewing angle;

[0028] Figure 5 It is a schematic diagram of the structure of the control mechanism of the present invention from a second viewing angle;

[0029] Figure 6 It is a schematic structural diagram of the transmission mechanism of the present invention from a first viewing angle;

[0030] Figure 7 It is a schematic structural diagram of the transmission mechanism of the present invention from a second viewing angle.

[0031] Summary of the accompanying drawings: 1. processing table; 2. drying plate; 3. sliding rod; 4. first connecting plate; 5. turntable; 6. fixed plate; 7. plug plate; 8. spring; 9. telescopic plate; 10. protective cover; 11. pressing machine body; 12. first push plate; 13. transmission mechanism; 1301. first hydraulic rod; 1302. push block; 1303. second connecting plate; 1304. disc; 1305. rotating plate; 1306. first moving rod; 1307. limit plate; 1308. movable plate; 14. control mechanism; 1401. second hydraulic rod; 1402. connecting block; 1403. second push plate; 1404. force plate; 1405. second moving rod; 1406. swing plate; 1407. transmission rod; 1408. control plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0036] For examples, see Figures 1 to 7 The present embodiment provides a silicon nitride ceramic bearing blank pressing machine, comprising a processing table 1, a drying plate 2 and a fixing mechanism arranged on the side of the processing table 1, the drying plate 2 is attached to the front end of the processing table 1, and the fixing mechanism comprises a transmission component and a fixing component;

[0037] The transmission assembly includes a slide bar 3, a first connecting plate 4, a turntable 5 and a fixed plate 6. The slide bar 3 is slidably connected to the side of the processing table 1. The surface of the slide bar 3 is slidably connected to the first connecting plate 4. The top of the first connecting plate 4 is fixedly connected to the turntable 5. The surface of the turntable 5 is fixedly connected to the fixed plate 6.

[0038] The fixing assembly includes a plug plate 7 and a spring 8. The spring 8 is fixedly connected to the side of the processing table 1, and the tail of the spring 8 is fixedly connected to a telescopic plate 9.

[0039] A telescopic plate 9 is fixedly connected to the surface of the processing table 1, a protective cover 10 is fixedly connected to the top of the telescopic plate 9, a pressing machine body 11 is arranged on the side of the protective cover 10 on the surface of the processing table 1, a first push plate 12 is slidably connected to the side of the pressing machine body 11 on the surface of the processing table 1, a transmission mechanism 13 is arranged on the side of the first push plate 12 on the surface of the processing table 1, and a control mechanism 14 is arranged on the surface of the processing table 1 on the back of the pressing machine body 11.

[0040] Furthermore, the first connecting plate 4 is arranged on the vertical center axis of the turntable 5, the sliding rod 3 is embedded in the vertical slideway inside the first connecting plate 4 and is slidably connected thereto, and the turntable 5 drives the fixed plate 6 through the sliding rod 3 to form a swinging structure. Because the first connecting plate 4 is arranged on the vertical center axis of the turntable 5, when the first connecting plate 4 is pushed by the sliding rod 3, it will drive the turntable 5 to rotate.

[0041] Furthermore, a socket matching the size of the plug plate 7 is provided on the right side of the drying plate 2, the fixed plate 6 and the plug plate 7 are in a tightly fitted state, and three groups of springs 8 are evenly distributed in a straight line on the surface of the plug plate 7. When the turntable 5 rotates, the fixed plate 6 will be driven to rotate synchronously and break away from the contact with the plug plate 7. Then, the plug plate 7 will pop out of the drying plate 2 under the action of the three groups of springs 8, and finally the drying plate 2 can be disassembled.

[0042] Furthermore, the transmission mechanism 13 includes a first hydraulic rod 1301, a push block 1302, a second connecting plate 1303, a disc 1304, a rotating plate 1305, a first moving rod 1306, a limit plate 1307 and a movable plate 1308. The first hydraulic rod 1301 is fixedly connected to the surface of the processing table 1, and the output end of the first hydraulic rod 1301 is fixedly connected to the push block 1302, the surface of the push block 1302 is rotatably connected to the second connecting plate 1303, the surface of the second connecting plate 1303 is rotatably connected to the disc 1304, the side of the disc 1304 is fixedly connected to the rotating plate 1305, the surface of the rotating plate 1305 is fixedly connected to the first moving rod 1306, the surface of the first moving rod 1306 is slidably connected to the limit plate 1307, and the surface of the limit plate 1307 is rotatably connected to the movable plate 1308. By setting the transmission mechanism 13, the first push plate 12 can be controlled to slide on the processing table 1 to realize automatic material withdrawal of the workpiece.

[0043] Furthermore, the second connecting plate 1303 is inclined relative to the surface of the push block 1302, and the connection between the second connecting plate 1303 and the disk 1304 deviates from the center of the disk 1304. The disk 1304 forms a rotating structure through the second connecting plate 1303. Because the second connecting plate 1303 is deviated from the center of the disk 1304, when it moves, it will pull the disk 1304 to rotate clockwise, and the first movement rod 1306 will move accordingly.

[0044] Furthermore, first movement rods 1306 are provided at the left and right end points of the rotating plate 1305, and the first movement rods 1306 are embedded in the vertical slide groove on the surface of the limit plate 1307 and are slidably connected thereto, and the tail of the movable plate 1308 is rotationally connected to the first push plate 12. Because the first movement rod 1306 is embedded in the vertical slide groove of the limit plate 1307, when the first movement rod 1306 rotates, it will push the two groups of limit plates 1307 away from each other and drive the two groups of movable plates 1308 to gradually tilt. Since the tail of the movable plate 1308 is rotationally connected to the first push plate 12, when the movable plate 1308 moves, it will pull the first push plate 12, so that the first push plate 12 moves to the left along the processing table 1 and returns to the initial position.

[0045] Furthermore, the control mechanism 14 includes a second hydraulic rod 1401, a connecting block 1402, a second push plate 1403, a force plate 1404, a second moving rod 1405, a swing plate 1406, a transmission rod 1407 and a control plate 1408. The second hydraulic rod 1401 is fixedly connected to the surface of the processing table 1, and the output end of the second hydraulic rod 1401 is fixedly connected to the connecting block 1402. The surface of the connecting block 1402 is rotatably connected to the second push plate 1403. The surface of the second push plate 1403 is rotatably connected to the force plate 1404. The surface of the force plate 1404 is fixedly connected to the second moving rod 1405. The surface of the second moving rod 1405 is slidably connected to the swing plate 1406. The surface of the swing plate 1406 is fixedly connected to the transmission rod 1407. The surface of the transmission rod 1407 is slidably connected to the control plate 1408. By setting the control mechanism 14, the protective cover 10 can be controlled to be raised and lowered, and the protective cover 10 can perform dust-proof treatment on the pressing machine body 11.

[0046] Furthermore, the connection points between the second push plate 1403, the force-bearing plate 1404 and the connecting block 1402 are all located at their own end points. The force-bearing plate 1404 forms a sliding structure through the second push plate 1403, and the transmission rod 1407 is set to deviate from the rotation point of the swing plate 1406. Since the second push plate 1403 is set at an angle, the descent of the connecting block 1402 will cause the right side of the second push plate 1403 to move downward, and gradually align the force-bearing plate 1404 to apply a thrust to the right, and the second movement rod 1405 will move to the right accordingly.

[0047] Furthermore, the control panel 1408 is fixedly connected to the protective cover 10, and a transverse slide matching the size of the transmission rod 1407 is provided on the surface of the control panel 1408. The control panel 1408 drives the protective cover 10 through the transmission rod 1407 to form a lifting structure. Because the second movement rod 1405 is embedded in the interior of the swing plate 1406, the swing plate 1406 will swing through the movement of the second movement rod 1405, and drive the transmission rod 1407 to slide inside the control panel 1408. When the transmission rod 1407 slides, a downward thrust is applied to the control panel 1408, so that the control panel 1408 drives the protective cover 10 fixedly connected to itself to descend.

[0048] like Figure 1 As shown, the silicon nitride ceramic bearing blank pressing machine, when in use, firstly sets the protective cover 10. When the pressing machine body 11 is not in use, in order to achieve the purpose of dust prevention, the second hydraulic rod 1401 can be opened. When the second hydraulic rod 1401 is controlled to drive the connecting block 1402 to descend, since the second push plate 1403 is inclined, the descent of the connecting block 1402 will cause the right side of the second push plate 1403 to move downward, and gradually align the force-bearing plate 1404 to apply a thrust to the right, and the second movement rod 1405 will move to the right accordingly, because the second movement rod 1405 is embedded in the inside of the swing plate 1406, the swing plate 1406 will swing through the movement of the second movement rod 1405, and drive the transmission rod 1407 to slide inside the control plate 1408. When the transmission rod 1407 slides, it will apply a thrust downward to the control plate 1408, so that the control plate 1408 drives the protective cover 10 fixedly connected to itself to descend, and covers the pressing machine body 11, thereby achieving the purpose of dust prevention;

[0049] When the pressing machine body 11 has finished processing the ceramic bearing, the first push plate 12 can be used to push the ceramic bearing to the side to prevent workers from directly taking it from the bottom of the processing head, which poses a safety hazard. When the first push plate 12 needs to be returned to its original position, the first hydraulic rod 1301 is opened, and then the first hydraulic rod 1301 applies a thrust to the right to the second connecting plate 1303. Because the second connecting plate 1303 is set away from the center of the disc 1304, when it moves, it will pull the disc 1304 to rotate clockwise. The first movement rod 1306 will move accordingly, because the first movement rod 1306 is embedded in the vertical slide groove of the limit plate 1307. When the first movement rod 1306 rotates, it will push the two groups of limit plates 1307 away from each other, and drive the two groups of movable plates 1308 to gradually tilt. Since the tail of the movable plate 1308 is rotatably connected to the first push plate 12, when the movable plate 1308 moves, it will pull the first push plate 12, so that the first push plate 12 moves to the left along the processing table 1 and returns to the initial position;

[0050] Finally, put the workpiece that has just been processed on the drying plate 2 for drying. When the drying plate 2 needs to be disassembled after long-term use, slide the sliding bar 3 along the side of the processing table 1, and then the sliding bar 3 will slide along the inside of the first connecting plate 4. Because the first connecting plate 4 is arranged on the vertical center axis of the turntable 5, when the first connecting plate 4 is pushed by the sliding bar 3, it will drive the turntable 5 to rotate. When the turntable 5 rotates, it will drive the fixed plate 6 to rotate synchronously and break away from the contact with the plug plate 7. Then the plug plate 7 will pop out of the drying plate 2 under the action of the three sets of springs 8, and finally the drying plate 2 can be disassembled.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A silicon nitride ceramic bearing blank granule pressing machine, comprising a processing table, a drying plate, and a fixing mechanism arranged on the side of the processing table, Characterized in that: The drying plate is attached to the front end of the processing table, and the fixing mechanism includes a transmission component and a fixing component; The transmission component includes a sliding rod, a first connecting plate, a turntable, and a fixing plate. The sliding rod is slidably connected to the side of the processing table. The surface of the sliding rod is slidably connected with a first connecting plate. The top of the first connecting plate is fixedly connected with a turntable, and the surface of the turntable is fixedly connected with a fixing plate; The fixing component includes a plug plate and a spring. The spring is fixedly connected to the side of the processing table, and the tail of the spring is fixedly connected with a telescopic plate; The surface of the processing table is fixedly connected with a telescopic plate. The top of the telescopic plate is fixedly connected with a protective cover. On the side of the protective cover and on the surface of the processing table, there is a pressing machine main body. On the side of the pressing machine main body and on the surface of the processing table, there is a first push plate slidably connected. On the side of the first push plate and on the surface of the processing table, there is a transmission mechanism. On the surface of the processing table and behind the pressing machine main body, there is a control mechanism; The first connecting plate is arranged on the vertical axis of the turntable. The sliding rod is embedded in the vertical sliding track inside the first connecting plate and is slidably connected with it. The turntable drives the fixing plate through the sliding rod to form a swinging structure; The control mechanism includes a second hydraulic rod, a connecting block, a second push plate, a stress plate, a second moving rod, a swinging plate, a transmission rod, and a control plate. The second hydraulic rod is fixedly connected to the surface of the processing table. The output end of the second hydraulic rod is fixedly connected with a connecting block. The surface of the connecting block is rotatably connected with a second push plate. The surface of the second push plate is rotatably connected with a stress plate. The surface of the stress plate is fixedly connected with a second moving rod. The surface of the second moving rod is slidably connected with a swinging plate. The surface of the swinging plate is fixedly connected with a transmission rod. The surface of the transmission rod is slidably connected with a control plate; The joints of the second push plate with the stress plate and the connecting block are both located at its own end points. The stress plate forms a sliding structure through the second push plate. The transmission rod is arranged deviating from the rotation point of the swinging plate.

2. A silicon nitride ceramic bearing blank granule pressing machine according to claim 1, Characterized in that: On the right side of the drying plate, there are insertion holes matching the size of the plug plate. The fixing plate and the plug plate are in a tightly fitting state. Three groups of springs are evenly distributed in a straight line on the surface of the plug plate.

3. A silicon nitride ceramic bearing blank granule pressing machine according to claim 1, Characterized in that: The transmission mechanism includes a first hydraulic rod, a push block, a second connecting plate, a disc, a rotating plate, a first moving rod, a limiting plate, and a movable plate. The first hydraulic rod is fixedly connected to the surface of the processing table. The output end of the first hydraulic rod is fixedly connected with a push block. The surface of the push block is rotatably connected with a second connecting plate. The surface of the second connecting plate is rotatably connected with a disc. The side of the disc is fixedly connected with a rotating plate. The surface of the rotating plate is fixedly connected with a first moving rod. The surface of the first moving rod is slidably connected with a limiting plate. The surface of the limiting plate is rotatably connected with a movable plate.

4. A silicon nitride ceramic bearing blank granule pressing machine according to claim 3, characterized in that: the second connecting plate is inclined with respect to the surface of the push block, the connection between the second connecting plate and the disc deviates from the center of the disc, and the disc forms a rotating structure through the second connecting plate.

5. A silicon nitride ceramic bearing blank granule pressing machine according to claim 4, characterized in that: first moving rods are arranged at both left and right end points of the rotating plate, the first moving rods are embedded in the vertical sliding grooves on the surface of the limiting plate and are slidably connected thereto, and the tail of the movable plate is rotatably connected to the first push plate.

6. A silicon nitride ceramic bearing blank granule pressing machine according to claim 1, characterized in that: the control board is fixedly connected to the protective cover, a horizontal slideway matching the size of the transmission rod is arranged on the surface of the control board, and the control board drives the protective cover to form a lifting structure through the transmission rod.

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