Metal surface coating device

Abstract

The utility model provides a metal surface coating device, and relates to the technical field of metal surface coating. The number of the L-shaped supporting plates is two, and the two sets of L-shaped supporting plates are symmetrically arranged on the supporting bottom plate; the lifting part is arranged on the L-shaped supporting plate; the placing part is arranged on the lifting part, is rotationally connected with the lifting part and is used for placing a metal plate to be processed; and the spraying part is arranged on the L-shaped supporting plate. The lifting plate is arranged to drive the placing part to move up and down, so that the distance between the placing part and the spraying part is adjusted, and the spraying part cannot be touched when the placing part is rotated and one surface of a metal plate to be machined is turned over; and meanwhile, the placing part is arranged, the metal plate to be machined is placed on the placing part, the clamping device does not need to make contact with the metal plate to be machined, and therefore it is guaranteed that no spraying dead angle exists when the spraying part sprays the face.

Description

Technical Field

[0001] The utility model relates to the technical field of metal surface coating, in particular to a metal surface coating device. Background Art

[0002] Metal surface coating is to coat a very thin transparent film on the metal surface. The purpose is to reduce light reflection, increase light transmittance, resist ultraviolet rays and suppress glare and ghosting; metal surface coating is mainly sprayed on the metal surface.

[0003] When spraying metal plates, existing metal surface coating devices often require a clamping device to clamp the metal plate, which makes it difficult to spray the contact area between the clamping device and the metal plate. After the spraying is completed, the unsprayed areas can only be sprayed separately, which affects the coating quality and makes the overall effect after spraying less beautiful. At the same time, it is difficult to turn over when placed on a processing table for spraying. Utility Model Content

[0004] The utility model provides a metal surface coating device. A placing part is arranged to be rotatable on a lifting part so that the placing part can be turned over when placing a metal plate to be processed, so that after one side of the metal plate to be processed is spray-coated, the other side can be spray-coated.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] The embodiment of the utility model provides a metal surface coating device, comprising:

[0007] Support base plate;

[0008] Two groups of L-shaped support plates are provided, and the two groups of L-shaped support plates are symmetrically arranged on the support bottom plate;

[0009] A lifting part, arranged on the L-shaped supporting plate;

[0010] A placing portion, disposed on the lifting portion and rotatably connected to the lifting portion, for placing the metal plate to be processed;

[0011] The spraying part is arranged on the L-shaped supporting plate.

[0012] Furthermore, the lifting part includes:

[0013] There are two sets of lifting components, and the two sets of lifting components are respectively connected to the two sets of L-shaped support plates;

[0014] A first motor is arranged on the L-shaped supporting plate;

[0015] A chain is arranged on the lifting assembly.

[0016] Furthermore, the lifting assembly includes:

[0017] A first threaded rod, one end of which is rotatably connected to the support base plate, and the other end of which is rotatably connected to an end of the L-shaped support plate away from the support base plate, and a group of the first threaded rods is inserted through the L-shaped support plate and fixedly connected to the output end of the first motor;

[0018] A first threaded sleeve, sleeved on the first threaded rod;

[0019] The first sprocket is sleeved on the first threaded rod, and two groups of the first sprockets are meshed and connected with the chain.

[0020] Furthermore, the placement unit includes:

[0021] The limiting frame is connected to the first threaded sleeve via a clamping assembly;

[0022] There are four groups of support and limit assemblies, two groups of the support and limit assemblies are arranged at the bottom end of the limit frame, and two groups of the support and limit assemblies are arranged at the top end of the limit frame.

[0023] Furthermore, the support and limiting assembly includes:

[0024] A first slide groove is arranged on the limit frame;

[0025] A first sliding block, slidably connected in the first sliding groove;

[0026] A first supporting plate connected to the first sliding block;

[0027] A handle, disposed on the first supporting plate;

[0028] The magnetic block is arranged on the first supporting plate.

[0029] Furthermore, the clamping assembly includes:

[0030] A fixed plate, disposed on the first threaded sleeve;

[0031] A rotating disk, rotatably connected to the fixed disk via a first connecting shaft;

[0032] A clamping shaft is passed through the fixing plate;

[0033] A first limiting sleeve, sleeved on the clamping shaft;

[0034] A first spring, one end of which is connected to the fixing plate, and the other end of which is connected to the first limiting sleeve;

[0035] The clamping groove is arranged on the rotating disk and matches with the clamping shaft.

[0036] Furthermore, the spraying unit includes:

[0037] A U-shaped top plate, with both ends connected to the L-shaped support plate;

[0038] A displacement assembly is arranged on the U-shaped top plate;

[0039] A material storage box, arranged on the U-shaped top plate;

[0040] A feed pipe, one end of which is connected to the storage box;

[0041] A delivery pump is disposed on the U-shaped top plate and connected to the other end of the feed pipe;

[0042] A discharge pipe, one end of which is connected to the delivery pump;

[0043] A connecting plate, disposed on the displacement assembly and connected to the other end of the discharge pipe;

[0044] The nozzle is arranged on the connecting plate.

[0045] Furthermore, the displacement component comprises:

[0046] A second threaded rod, both ends of which are rotatably connected to both ends of the U-shaped top plate;

[0047] A second threaded sleeve, sleeved on the second threaded rod;

[0048] A second motor is disposed on the U-shaped top plate, and an output end of the second motor is fixedly connected to the second threaded rod;

[0049] A first connecting plate, disposed on the second threaded sleeve;

[0050] Two sets of first fixing blocks are provided and are respectively fixedly connected to two ends of the first connecting plate;

[0051] A third threaded rod, both ends of which are rotatably connected to the first fixing block;

[0052] A third threaded sleeve, sleeved on the third threaded rod and connected to the connecting plate;

[0053] The third motor is arranged on the first fixing block, and an output end of the third motor is fixedly connected to one end of the third threaded rod.

[0054] The above solution of the utility model includes at least the following beneficial effects:

[0055] The utility model is provided with a lifting plate to drive the placing part to move up and down, thereby adjusting the distance between the placing part and the spraying part, so that when the placing part is rotated to turn over one side of the metal plate to be processed, the spraying part will not be touched; at the same time, the placing part is provided to place the metal plate to be processed thereon, so that the clamping device does not need to contact the metal plate to be processed, thereby ensuring that there will be no dead angle for spraying when the spraying part sprays this side. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a three-dimensional diagram of the metal surface coating device of the utility model;

[0057] Figure 2 It is a first partial stereoscopic view of the metal surface coating device of the utility model;

[0058] Figure 3 It is an enlarged view of point A of the metal surface coating device of the utility model;

[0059] Figure 4 It is a first stereoscopic view of the placement part of the metal surface coating device of the utility model;

[0060] Figure 5 It is an enlarged view of the B portion of the metal surface coating device of the utility model;

[0061] Figure 6 It is a second stereoscopic view of the placement part of the metal surface coating device of the utility model;

[0062] Figure 7 It is a partial exploded stereogram of the metal surface coating device of the utility model;

[0063] Figure 8 It is a first stereoscopic view of the spraying part of the metal surface coating device of the utility model;

[0064] Fig. 9 It is a second stereoscopic view of the spraying part of the metal surface coating device of the utility model.

[0065] Description of reference numerals:

[0066] 1. Supporting bottom plate; 101. L-shaped supporting plate; 102. U-shaped top plate; 201. First motor; 202. First threaded rod; 203. First threaded sleeve; 204. First sprocket; 205. Chain; 301. Fixed plate; 302. Rotating plate; 303. Snap-on shaft; 304. First spring; 305. Snap-on groove; 306. First connecting shaft; 307. First limiting sleeve; 401. Limiting frame; 402. First slide groove; 403. Magnetic block; 40 4. First support plate; 405. Handle; 406. First slider; 407. Second connecting shaft; 501. Storage box; 502. Feed pipe; 503. Delivery pump; 504. Discharge pipe; 505. Connecting plate; 506. Spray nozzle; 602. Second threaded rod; 603. Second motor; 604. Second threaded sleeve; 605. First connecting plate; 606. First fixing block; 607. Third threaded sleeve; 608. Third threaded rod; 609. Third motor. DETAILED DESCRIPTION

[0067] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0068] like Figures 1 to 9 As shown, an embodiment of the utility model provides a metal surface coating device, comprising: a supporting base plate 1; an L-shaped supporting plate 101, which is provided in two groups, and the two groups of L-shaped supporting plates 101 are symmetrically arranged on the supporting base plate 1; a lifting part, which is arranged on the L-shaped supporting plate 101; a placing part, which is arranged on the lifting part and is rotatably connected to the lifting part and is used for placing a metal plate to be processed; and a spraying part, which is arranged on the L-shaped supporting plate 101.

[0069] In the embodiment of the utility model, a lifting plate is provided to drive the placing part to move up and down, thereby adjusting the distance between the placing part and the spraying part, so that when the placing part is rotated to flip one side of the metal plate to be processed, the spraying part will not be touched; at the same time, the placing part is provided to place the metal plate to be processed thereon, so that the clamping device does not need to contact the metal plate to be processed, thereby ensuring that there will be no dead angle for spraying when the spraying part sprays this side.

[0070] like Figures 1 to 9 As shown, the lifting part includes: a lifting assembly, which is provided with two groups, and the two groups of lifting assemblies are respectively connected to the two groups of L-shaped support plates 101; a first motor 201, which is provided on the L-shaped support plate 101; and a chain 205, which is provided on the lifting assembly.

[0071] like Figures 1 to 9 As shown, the lifting assembly includes: a first threaded rod 202, one end of which is rotatably connected to the support base plate 1, and the other end of which is rotatably connected to an end of the L-shaped support plate 101 away from the support base plate 1, and one group of the first threaded rods 202 is inserted through the L-shaped support plate 101 and fixedly connected to the output end of the first motor 201; a first threaded sleeve 203, which is sleeved on the first threaded rod 202; a first sprocket 204, which is sleeved on the first threaded rod 202, and two groups of the first sprockets 204 are meshed and connected with the chain 205.

[0072] In the embodiment of the utility model, by starting the first motor 201, the first threaded rod 202 is driven to rotate, thereby driving the first threaded sleeve 203 to move up and down; at this time, the rotation of the first threaded rod 202 simultaneously drives the first sprocket 204 to rotate, thereby driving the first sprocket 204 on another group of lifting components to rotate through the chain 205, thereby driving the first threaded rod 202 on another group of lifting components to rotate, thereby driving the first threaded sleeve 203 on another group of lifting components to move up and down; because the first sprocket 204 drives the first sprocket 204 on another group of lifting components to rotate synchronously through the chain 205, the two first threaded sleeves 203 can be moved up and down synchronously, thereby driving the placement plate to move up and down.

[0073] like Figures 1 to 9 As shown, the placement portion includes: a limit frame 401, one end of which is connected to the first threaded sleeve 203 via a clamping assembly; the other end is rotatably connected to another group of first threaded sleeves 203 via a second connecting shaft 407; a support limit assembly, which is provided with four groups, two groups of the support limit assemblies are provided at the bottom end of the limit frame 401, and two groups of the support limit assemblies are provided at the top end of the limit frame 401.

[0074] In the embodiment of the utility model, four groups of support and limit components are arranged at both ends of the limit frame 401, two groups of support and limit components support one side of the metal plate to be processed, and the other two groups of support and limit components are far away from the limit frame 401, thereby ensuring that the sprayed surface of the metal plate to be processed can be completely exposed under the spraying part, and when flipping, the other two groups of support and limit components are arranged together to form a box body with the limit frame 401, so that the metal plate to be processed is limited in the limit frame 401; thereby, when flipping, the metal plate to be processed will not separate from the limit frame 401.

[0075] like Figures 1 to 9 As shown, the support and limit assembly includes: a first slide groove 402, which is arranged on the limit frame 401; a first slider 406, which is slidably connected in the first slide groove 402; a first support plate 404, which is connected to the first slider 406; a handle 405, which is arranged on the first support plate 404; and a magnetic block 403, which is arranged on the first support plate 404.

[0076] In the embodiment of the utility model, during spraying, the first support plate 404 in the two groups of support and limit assemblies at the lower end, by manually pushing the handle 405, causes the first slider 406 to drive the first support plate 404 to move inward along the first slide groove 402, so that the two groups of first support plates 404 are close to each other, so that the magnetic blocks 403 on the two groups of first support plates 404 are in contact, and the two magnetic blocks 403 attract each other, thereby realizing the connection between the two first support plates 404, and avoiding unnecessary sliding of the first support plates 404.

[0077] The two first support plates 404 at the bottom are close to each other to form a whole, so as to support metal plates to be processed of different sizes. The two first support plates 404 at the top are manually pushed by the handle 405, so that the first slider 406 drives the first support plates 404 to move outward along the first slide groove 402, so that the two groups of first support plates 404 are away from each other, and the edges just coincide with the edges of the limit frame 401, so that the metal plates to be processed in the limit frame 401 can be completely sprayed.

[0078] After one side is sprayed and coated, when turning over, the handle 405 is manually pushed, so that the first slider 406 drives the first support plate 404 to move inward along the first slide groove 402, so that the two groups of first support plates 404 are close to each other, so that the magnetic blocks 403 on the two groups of first support plates 404 are in contact, and the two magnetic blocks 403 attract each other, thereby realizing the connection between the two first support plates 404; at this time, the limit frame 401 and the four groups of first support plates 404 form a sealed box body, and the metal plate to be processed is in the box body. By manually rotating the limit frame 401, the whole is rotated 180 degrees; at this time, the other side of the metal plate to be processed is rotated upward; then the handle 405 is manually pushed, so that the first slider 406 drives the first support plate 404 to move outward along the first slide groove 402, so that the two groups of first support plates 404 are away from each other, so that the other side of the metal plate to be processed can be sprayed.

[0079] like Figures 1 to 9 As shown, the clamping assembly includes: a fixed disk 301, which is arranged on the first threaded sleeve 203; a rotating disk 302, which is rotatably connected to the fixed disk 301 via a first connecting shaft 306; a clamping shaft 303, which is passed through the fixed disk 301; a first limiting sleeve 307, which is sleeved on the clamping shaft 303; a first spring 304, one end of which is connected to the fixed disk 301, and the other end of which is connected to the first limiting sleeve 307; and a clamping groove 305, which is arranged on the rotating disk 302 and cooperates with the clamping shaft 303.

[0080] In the embodiment of the utility model, firstly, one end of the clamping shaft 303 is manually driven to move outward, so that the first spring 304 contracts and the other end of the clamping shaft 303 is disengaged from the clamping groove 305, and then the limit frame 401 is manually rotated so that the limit frame 401 drives the rotating disk 302 to rotate. When the clamping shaft 303 and the clamping groove 305 are misaligned, the clamping shaft 303 is manually loosened to stretch the first spring 304 and the other end of the clamping shaft 303 is attached to the rotating disk 302; when the limit frame 401 rotates 180 degrees, the clamping shaft 303 is just clamped into another clamping groove 305, so that the limit frame 401 stops rotating, thereby achieving the stability of the limit frame 401 and the convenience of rotation.

[0081] There are two clamping grooves 305 on the rotating disk 302 , and the two clamping grooves 305 are symmetrical to each other.

[0082] like Figures 1 to 9 As shown, the spraying part includes: a U-shaped top plate 102, both ends of which are connected to the L-shaped support plate 101; a displacement component, which is arranged on the U-shaped top plate 102; a storage box 501, which is arranged on the U-shaped top plate 102; a feed pipe 502, one end of which is connected to the storage box 501; a delivery pump 503, which is arranged on the U-shaped top plate 102 and connected to the other end of the feed pipe 502; a discharge pipe 504, one end of which is connected to the delivery pump 503; a connecting plate 505, which is arranged on the displacement component and connected to the other end of the discharge pipe 504; a nozzle 506, which is arranged on the connecting plate 505.

[0083] In an embodiment of the utility model, the delivery pump 503 is started to transport the paint from the storage box 501 to the connecting plate 505 through the feed pipe 502 and the discharge pipe 504, and then sprayed downward from the nozzle 506 on the connecting plate 505; wherein, the discharge pipe 504 is configured to be a hose type, so as to adapt to the left and right, front and back movement of the connecting plate 505.

[0084] like Figures 1 to 9 As shown, the displacement assembly includes: a second threaded rod 602, both ends of which are rotatably connected to both ends of the U-shaped top plate 102; a second threaded sleeve 604, which is sleeved on the second threaded rod 602; a second motor 603, which is arranged on the U-shaped top plate 102, and the output end is fixedly connected to the second threaded rod 602; a first connecting plate 605, which is arranged on the second threaded sleeve 604; a first fixed block 606, which is provided with two groups, respectively fixedly connected to the two ends of the first connecting plate 605; a third threaded rod 608, both ends of which are rotatably connected to the first fixed block 606; a third threaded sleeve 607, which is sleeved on the third threaded rod 608 and connected to the connecting plate 505; a third motor 609, which is arranged on the first fixed block 606, and the output end is fixedly connected to one end of the third threaded rod 608.

[0085] In the embodiment of the utility model, by starting the second motor 603, the second threaded rod 602 is driven to rotate, thereby driving the second threaded sleeve 604 to move left and right, thereby driving the first connecting plate 605 to move left and right, and the first connecting plate 605 drives the connecting disk 505 to move left and right, thereby realizing the left and right movement of the nozzle 506; then starting the third motor 609, driving the third threaded rod 608 to rotate, thereby driving the third threaded sleeve 607 to move forward and backward, and the third threaded sleeve 607 drives the connecting disk 505 to move forward and backward, thereby realizing the forward and backward movement of the nozzle 506; finally, the nozzle 506 can move arbitrarily within the range of the limit frame 401 to avoid the existence of blind spots of the nozzle 506.

[0086] Working principle: manually push the handle 405 on the two groups of first support plates 404 at the lower end, so that the first slider 406 drives the first support plates 404 to move inward along the first slide groove 402, so that the two groups of first support plates 404 are close to each other, so that the magnetic blocks 403 on the two groups of first support plates 404 are in contact, thereby realizing the connection between the two first support plates 404; place the metal parts to be processed on the two first support plates 404, start the delivery pump 503, and transport the paint from the storage box 501 to the connecting plate 505 through the feed pipe 502 and the discharge pipe 504, and then spray downward from the nozzle 506 on the connecting plate 505, and then drive the second motor 603 and the third motor 609 to drive the nozzle 506 to move arbitrarily within the range of the limit frame 401, avoiding the existence of a dead angle of the nozzle 506;

[0087] After one side is sprayed, the first motor 201 is started to drive the first threaded rod 202 to rotate, thereby driving the first threaded sleeve 203 to move downward; at this time, the first threaded rod 202 rotates and drives the first sprocket 204 to rotate, thereby driving the first sprocket 204 on another set of lifting components to rotate through the chain 205, thereby driving the first threaded rod 202 on another set of lifting components to rotate, thereby driving the first threaded sleeve 203 on another set of lifting components to move downward; thereby driving the placement plate to move downward, and stopping when it moves to a position that does not affect the flipping of the placement plate;

[0088] When the plate is turned over, the two groups of handles 405 at the upper end are first pushed manually, so that the first slider 406 drives the first support plate 404 to move inward along the first slide groove 402, so that the two groups of first support plates 404 are close to each other, so that the magnetic blocks 403 on the two groups of first support plates 404 are in contact, and the two magnetic blocks 403 attract each other, thereby realizing the connection between the two first support plates 404; at this time, the limit frame 401 and the four groups of first support plates 404 form a sealed box body, and the metal plate to be processed is in the box body; then one end of the clamping shaft 303 is manually driven to move outward, so that the first A spring 304 contracts, and the other end of the clamping shaft 303 is separated from the clamping groove 305, and then the limit frame 401 is manually rotated to make the limit frame 401 drive the rotating disk 302 to rotate. When the clamping shaft 303 and the clamping groove 305 are misaligned, the clamping shaft 303 is manually loosened to stretch the first spring 304, and the other end of the clamping shaft 303 is attached to the rotating disk 302; when the limit frame 401 rotates 180 degrees, the clamping shaft 303 is just clamped into another clamping groove 305, so that the limit frame 401 stops rotating, thereby achieving the stability of the limit frame 401 and the convenience of rotation;

[0089] Then, by manually pushing the handle 405, the first slider 406 drives the first support plate 404 to move outward along the first slide groove 402, so that the two groups of first support plates 404 are separated from each other, so that the other side of the metal plate to be processed can be sprayed; finally, complete spraying of both sides of the metal plate to be processed is achieved without using a clamping device.

[0090] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A metal surface coating device, characterized in that: include: Supporting base plate (1); Two groups of L-shaped support plates (101) are provided, and the two groups of L-shaped support plates (101) are symmetrically arranged on the supporting bottom plate (1); A lifting part, arranged on the L-shaped supporting plate (101); A placing portion, disposed on the lifting portion and rotatably connected to the lifting portion, for placing the metal plate to be processed; The spraying part is arranged on the L-shaped supporting plate (101).

2. The metal surface coating device according to claim 1, characterized in that: The lifting part comprises: There are two sets of lifting components, and the two sets of lifting components are respectively connected to the two sets of L-shaped support plates (101); A first motor (201) is arranged on the L-shaped support plate (101); A chain (205) is arranged on the lifting assembly.

3. The metal surface coating device according to claim 2, characterized in that: The lifting assembly comprises: A first threaded rod (202), one end of which is rotatably connected to the support base plate (1), and the other end of which is rotatably connected to an end of the L-shaped support plate (101) away from the support base plate (1), and a group of the first threaded rods (202) is inserted through the L-shaped support plate (101) and fixedly connected to the output end of the first motor (201); A first threaded sleeve (203), sleeved on the first threaded rod (202); The first sprocket (204) is sleeved on the first threaded rod (202), and two groups of the first sprockets (204) are meshedly connected with the chain (205).

4. The metal surface coating device according to claim 3, characterized in that: The placement unit includes: A limiting frame (401) is connected to the first threaded sleeve (203) via a clamping assembly; Four groups of support and limit assemblies are provided, two groups of the support and limit assemblies are provided at the bottom end of the limit frame (401), and two groups of the support and limit assemblies are provided at the top end of the limit frame (401).

5. The metal surface coating device according to claim 4, characterized in that: The support and limiting assembly comprises: A first slide groove (402) is arranged on the limiting frame (401); A first sliding block (406) is slidably connected in the first sliding groove (402); A first supporting plate (404) connected to the first sliding block (406); A handle (405) is disposed on the first support plate (404); The magnetic block (403) is arranged on the first supporting plate (404).

6. The metal surface coating device according to claim 5, characterized in that: The clamping assembly comprises: A fixed plate (301) is arranged on the first threaded sleeve (203); A rotating disk (302) is rotatably connected to the fixed disk (301) via a first connecting shaft (306); A clamping shaft (303) is inserted into the fixing plate (301); A first limiting sleeve (307) is sleeved on the clamping shaft (303); A first spring (304), one end of which is connected to the fixing plate (301), and the other end of which is connected to the first limiting sleeve (307); The clamping groove (305) is arranged on the rotating disk (302) and matches with the clamping shaft (303).

7. The metal surface coating device according to claim 6, characterized in that: The spraying unit comprises: A U-shaped top plate (102), both ends of which are connected to the L-shaped support plate (101); A displacement assembly, arranged on the U-shaped top plate (102); A material storage box (501) is arranged on the U-shaped top plate (102); A feed pipe (502), one end of which is connected to the storage box (501); A delivery pump (503) is disposed on the U-shaped top plate (102) and connected to the other end of the feed pipe (502); A discharge pipe (504), one end of which is connected to the delivery pump (503); A connecting plate (505) is disposed on the displacement assembly and connected to the other end of the discharge pipe (504); The nozzle (506) is arranged on the connecting plate (505).

8. The metal surface coating device according to claim 7, characterized in that: The displacement assembly comprises: A second threaded rod (602), both ends of which are rotatably connected to both ends of the U-shaped top plate (102); A second threaded sleeve (604), sleeved on the second threaded rod (602); A second motor (603) is disposed on the U-shaped top plate (102), and an output end thereof is fixedly connected to the second threaded rod (602); A first connecting plate (605) is arranged on the second threaded sleeve (604); Two sets of first fixing blocks (606) are provided and are respectively fixedly connected to two ends of the first connecting plate (605); A third threaded rod (608), both ends of which are rotatably connected to the first fixing block (606); A third threaded sleeve (607), sleeved on the third threaded rod (608) and connected to the connecting plate (505); The third motor (609) is arranged on the first fixing block (606), and the output end is fixedly connected to one end of the third threaded rod (608).

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