Full-automatic efficient plate deburring device for whole house customization

By designing a fully automatic and efficient deburring device for whole-house customization panels, and adopting the compound movement of the main grinding component and the side grinding component, the problems of low efficiency and high cost of traditional equipment are solved, and efficient and uniform deburring of the panel surface and edges is achieved.

CN120816396APending Publication Date: 2025-10-21ANHUI CONCAVE FURNITURE CO LTD
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Patent Information

Application Number
CN202511230706.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-30
Publication Date
2025-10-21

AI Technical Summary

Technical Problem

Traditional plate deburring equipment is inefficient and increases equipment costs, making it impossible to achieve efficient automated processing for whole-house customization.

Method used

A fully automatic and efficient deburring device for whole-house customization panels is designed, which includes a main grinding component and a side grinding component. Through multi-directional grinding and compound motion, the synchronous deburring of the panel surface and edge is achieved.

Benefits of technology

It improves deburring efficiency, reduces equipment costs, ensures uniform grinding of the plate surface and edges, and avoids overheating of the mold and deformation of the plate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a full-automatic efficient plate deburring device for whole house customization, and belongs to the technical field of plate machining equipment.The full-automatic efficient plate deburring device for whole house customization comprises a supporting frame and a conveying frame, the conveying frame is connected with an adjusting assembly, a plate and an electric telescopic rod, and a rear baffle is arranged on the inner side of the conveying frame; the main body grinding assembly is used for grinding the surface of a plate; the side edge grinding assembly is used for grinding the side face of the plate; the polishing device has the beneficial effects that the first motor, the transmission shaft, the transmission rod and the vertical plate can drive the polishing plate to conduct transverse reciprocating polishing on the surface of a plate so as to improve the polishing efficiency, meanwhile, the connecting plate and the joining plate can drive the protruding block to move left and right, reciprocating sliding extrusion is conducted on the hemispheroid, and it can be guaranteed that the polishing efficiency is improved while the polishing roller rotates. And the polishing roller is subjected to axial micro reciprocating vibration, so that the burr removal effect is enhanced, and the surface and the edge are subjected to all-around burr removal.
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Description

Technical Field

[0001] The present invention relates to the technical field of plate processing equipment, and in particular to a fully automatic and efficient deburring device for plates used for whole-house customization. Background Art

[0002] Deburring is an essential step in the production and processing of wood panels. Burrs are tiny fibers, chips, or partially separated wood that are left behind during sawing, planing, or grinding. Burrs not only affect the appearance and smoothness of the board but can also pose potential safety risks to processors and end users during subsequent applications, such as scratches.

[0003] Traditional equipment usually requires different tools to remove burrs from the surface and sides of the board. For example, deburring the surface of the board usually requires equipment such as a grinder, while deburring the side requires special edge trimming tools. Therefore, they are treated separately during the processing. After the burrs on the surface of the board are processed, they need to be moved to the side burr processing device for subsequent operations. This results in the entire deburring process being inefficient and increases the equipment cost. How to invent a fully automatic and efficient deburring device for whole-house customization to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides a fully automatic and efficient deburring device for panels for whole-house customization, aiming to solve the problems of low efficiency in the deburring process and increased equipment costs.

[0005] The present invention is achieved in that:

[0006] The present invention provides a fully automatic and efficient deburring device for panels for whole-house customization, comprising a support frame and a conveying frame, wherein the conveying frame is connected to an adjustment component, panels, and an electric telescopic rod, and a rear baffle is provided on the inner side of the conveying frame. The device also comprises:

[0007] A main body grinding assembly, the main body grinding assembly is located above the conveying frame and is used for grinding the surface of the plate;

[0008] A side grinding assembly is located on the inner side of the conveying frame and is used for grinding the side of the plate.

[0009] Preferably, the conveying frame is fixedly connected to the support frame, the side wall of the conveying frame is fixedly connected to the electric telescopic rod, and the conveying frame is in contact with the plate.

[0010] Preferably, the adjustment components are provided with two groups, and each group of the adjustment components is symmetrically distributed on both sides of the conveying frame. Each group of the adjustment components includes a limit rod and an adjustment rod, and the outer wall of the limit rod is provided with a telescopic spring. The adjustment rod is threadedly connected to the side wall of the conveying frame, and one end of the adjustment rod is rotatably connected to the side plate of the rear baffle. One end of the limit rod passes through the side wall of the conveying frame and is fixedly connected to the side wall of the rear baffle, and the two ends of the telescopic spring are respectively fixedly connected to the side wall of the conveying frame and the side wall of the rear baffle.

[0011] Preferably, the side grinding assembly includes a front baffle, one side of the front baffle is rotatably connected to one end of the corresponding adjusting rod, the front baffle is fixedly connected to one end of the corresponding limiting rod, the two ends of the telescopic spring are respectively fixedly connected to the corresponding front baffle and the side wall of the conveying frame, and the sides of the front baffle and the rear baffle are rotatably connected to a rotating cylinder.

[0012] Preferably, the front baffle is arranged in an "L" shape, the inner wall of one end of the front baffle is fixedly connected to a limiting rod, the outer wall of the limiting rod is slidably connected to a bearing plate, the outer wall of the limiting rod is sleeved with a reset spring, and the two ends of the reset spring are respectively fixedly connected to the side wall of the bearing plate and the inner wall of the front baffle.

[0013] Preferably, one end of the bearing plate is rotatably connected to a grinding roller, one end of the grinding roller is fixedly connected to a second motor, the second motor is fixedly connected to the side wall of one of the bearing plates, the other end of the grinding roller is threadedly connected to a screw, and the end of the screw away from the grinding roller is fixedly connected to a hemisphere.

[0014] Preferably, the main body grinding assembly includes a support plate, which is fixedly connected to one end of the electric telescopic rod away from the conveying frame, and symmetrically distributed slide holes are opened on both sides of the support plate. The inner wall of the slide hole is fixedly connected with a slide rod, and the outer wall of the slide rod is provided with a vertical plate, and the vertical plate is slidably connected to the inner wall of the slide hole.

[0015] Preferably, the main body grinding assembly also includes a first motor and a rotating plate, the first motor is fixedly connected to the support plate, one end of the first motor is fixedly connected to a transmission shaft, the end of the transmission shaft away from the first motor is fixedly connected to the rotating plate, and the side wall of the rotating plate is fixedly connected to a transmission rod.

[0016] Preferably, the main body grinding assembly also includes a fixed plate, which is fixedly connected to the end of the vertical plate away from the support plate, the lower side wall of the fixed plate is fixedly connected to the grinding plate, the upper side wall of the fixed plate is provided with a groove that slides with the transmission rod, the upper side wall of the fixed plate is fixedly connected to a connecting plate, the connecting plate is set in an "L" shape, one end of the connecting plate is provided with a connecting plate, the connecting plate is located above the hemisphere, and the side wall of the connecting plate is fixedly connected to a number of protrusions, which are slidably connected to the hemisphere.

[0017] The beneficial effects of the present invention are:

[0018] 1. During equipment processing, the first motor can drive the transmission shaft to rotate, and the rotating plate can drive the transmission rod to slide in the groove of the fixed plate, driving the vertical plate to move back and forth along the sliding rod, thereby driving the grinding plate to perform horizontal reciprocating grinding on the surface of the plate. At the same time, with the continuous transportation of the plate, the longitudinal grinding can be completed. Through multi-directional grinding, the grinding efficiency can be improved and uneven grinding can be avoided. The reciprocating motion can increase the contact cycle between the grinding tool and the workpiece, improve the heat dissipation time, and avoid the overheating and cracking of the grinding tool caused by unidirectional high-speed grinding.

[0019] 2. At the same time, the second motor can be started to drive the grinding roller to rotate, and the bearing plate can slide along the limit rod, and the return spring provides elastic support to make the grinding roller close to the side of the plate. When the edge of the plate is uneven, the grinding roller can ensure the uniformity of grinding. At the same time, during the reciprocating movement of the fixed plate, the protrusion can be driven to move left and right through the connecting plate and the connecting plate, and the hemisphere can be slid back and forth to squeeze it, which can ensure that the grinding roller performs a slight axial reciprocating vibration while the grinding roller rotates, so as to enhance the burr removal effect and achieve full-circle deburring of the surface and edge. The reciprocating motion of the main grinding assembly and the axial vibration of the side grinding assembly form a composite motion, so that the burrs are subjected to the dual effects of lateral cutting and axial impact, so as to improve the removal efficiency and reduce costs at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of a fully automatic and efficient deburring device for whole-house customization provided by an embodiment of the present invention;

[0022] Figure 2This is a schematic structural diagram of a side grinding assembly of a fully automatic and efficient deburring device for panels used in whole-house customization provided by an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the main body grinding component of a fully automatic and efficient deburring device for panels for whole-house customization provided by an embodiment of the present invention;

[0024] Figure 4 This is a partial structural cross-sectional view of a grinding roller of a fully automatic and efficient deburring device for panels for whole-house customization provided by an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the transmission shaft structure of a fully automatic and efficient deburring device for panels for whole-house customization provided by an embodiment of the present invention;

[0026] Figure 6 The invention provides a fully automatic and efficient deburring device for panels used in whole-house customization. Figure 1 A magnified schematic diagram of the structure in the middle.

[0027] In the figure: 1. Support frame; 2. Conveying frame; 3. Adjusting assembly; 31. Telescopic spring; 32. Limiting rod; 33. Adjusting rod; 4. Rear baffle; 5. Main body grinding assembly; 51. Support plate; 52. First motor; 53. Slide hole; 54. Slide rod; 55. Vertical plate; 56. Grinding plate; 57. Fixed plate; 571. Groove; 58. Drive shaft; 581. Rotating plate; 582. Drive rod; 59. Connecting plate; 591. Connecting plate; 592. Bump; 6. Side grinding assembly; 61. Front baffle; 62. Hemisphere; 63. Screw; 64. Bearing plate; 65. Grinding roller; 66. Second motor; 67. Return spring; 68. Limiting rod; 7. Plate; 8. Rotating cylinder; 9. Electric telescopic rod. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] Reference Figures 1-6A fully automatic and efficient deburring device for panels used in whole-house customization includes a support frame 1 and a conveying frame 2. The conveying frame 2 is connected to an adjustment component 3, a panel 7, and an electric telescopic rod 9. A rear baffle 4 is provided on the inner side of the conveying frame 2. The device also includes:

[0031] The main body grinding assembly 5 is located above the conveying frame 2 and is used to grind the surface of the plate 7;

[0032] The side grinding assembly 6 is located on the inner side of the conveying frame 2 . The side grinding assembly 6 is used to grind the side of the plate 7 . The side grinding assembly 6 and the rear baffle 4 are connected with a rotating cylinder 8 .

[0033] Furthermore; the conveying frame 2 is fixedly connected to the support frame 1, the side wall of the conveying frame 2 is fixedly connected to the electric telescopic rod 9, and the conveying frame 2 is in contact with the plate 7; there are two groups of adjustment components 3, each group of adjustment components 3 is symmetrically distributed on both sides of the conveying frame 2, and each group of adjustment components 3 includes a limit rod 32 and an adjustment rod 33, the outer wall of the limit rod 32 is provided with a telescopic spring 31, the adjustment rod 33 is threadedly connected to the side wall of the conveying frame 2, one end of the adjustment rod 33 is rotatably connected to the side plate of the rear baffle 4, one end of the limit rod 32 passes through the side wall of the conveying frame 2 and is fixedly connected to the side wall of the rear baffle 4, and the two ends of the telescopic spring 31 are respectively fixedly connected to the side wall of the conveying frame 2 and the side wall of the rear baffle 4.

[0034] The adjusting component 3 limits the plate 7 through threaded transmission and elastic buffering: the adjusting rod 33 is threadedly connected to the conveying frame 2. When the adjusting rod 33 is rotated, the front baffle 61 and the rear baffle 4 can be moved along the limiting rod 32 respectively, and the telescopic spring 31 can be stretched or compressed to provide elasticity, so that the rear baffle 4 and the front baffle 61 are adjusted to the same distance from the side wall of the conveying frame 2, so as to limit the two sides of the plate 7, and make the rotating cylinder 8 contact with the plate 7, and cooperate with the action of the conveyor belt on the conveying frame 2 to achieve stable transportation of the plate 7 and avoid its deviation. When the size of the plate 7 changes, the adjusting rod 33 can be rotated to drive the rear baffle 4 and the front baffle 61 to adjust through the limiting rod 32 to ensure stable blocking of plates 7 of different widths, while avoiding deformation of the plate 7 caused by rigid extrusion.

[0035] Furthermore, the main grinding assembly 5 includes a support plate 51, which is fixedly connected to the end of the electric telescopic rod 9 away from the conveying frame 2, and symmetrically distributed slide holes 53 are opened on both sides of the support plate 51. The inner wall of the slide hole 53 is fixedly connected with a slide rod 54, and the outer wall of the slide rod 54 is provided with a vertical plate 55, and the vertical plate 55 is slidably connected to the inner wall of the slide hole 53; the main grinding assembly 5 also includes a first motor 52 and a rotating plate 581, the first motor 52 is fixedly connected to the support plate 51, one end of the first motor 52 is fixedly connected to the transmission shaft 58, and the end of the transmission shaft 58 away from the first motor 52 is fixedly connected to the rotating plate 581, and the rotating plate 58 1 is fixedly connected to the side wall of the vertical plate 55 with a transmission rod 582; the main grinding assembly 5 also includes a fixed plate 57, which is fixedly connected to the end of the vertical plate 55 away from the support plate 51, and the lower side wall of the fixed plate 57 is fixedly connected to the grinding plate 56. The upper side wall of the fixed plate 57 is provided with a groove 571 that slides with the transmission rod 582. The upper side wall of the fixed plate 57 is fixedly connected to a connecting plate 59, which is arranged in an "L" shape. One end of the connecting plate 59 is provided with a connecting plate 591, which is located above the hemisphere 62. The side wall of the connecting plate 591 is fixedly connected with a number of protrusions 592, which are slidably connected to the hemisphere 62.

[0036] The main grinding assembly 5 realizes the grinding of the plate 7 through eccentric transmission: the extension and contraction of the moving end of the electric telescopic rod 9 can be controlled to drive the support plate 51 to move up and down, so that it can be adjusted according to the plates 7 of different thicknesses to ensure the grinding of the surface of the plate 7. When the grinding plate 56 is adjusted to the appropriate position, the first motor 52 drives the transmission shaft 58 to rotate, and the rotating plate 581 drives the transmission rod 582 to slide in the groove 571 of the fixed plate 57, driving the vertical plate 55 to move back and forth along the slide rod 54, thereby driving the grinding plate 56 to perform horizontal reciprocating grinding on the surface of the plate 7. At the same time, with the continuous transportation of the plate 7, longitudinal grinding can be completed. Through multi-directional grinding, the grinding efficiency can be improved and uneven grinding can be avoided. The reciprocating motion can increase the contact cycle between the grinding tool and the workpiece, improve the heat dissipation time, and avoid the occurrence of overheating and cracking of the grinding tool caused by unidirectional high-speed grinding.

[0037] Reference Figure 2 、 Figure 4 and Figure 6, further; the side grinding assembly 6 includes a front baffle 61, one side of the front baffle 61 is rotatably connected to one end of the corresponding adjusting rod 33, the front baffle 61 is fixedly connected to one end of the corresponding limit rod 32, and the two ends of the telescopic spring 31 are respectively fixedly connected to the corresponding front baffle 61 and the side wall of the conveying frame 2, and the sides of the front baffle 61 and the rear baffle 4 are rotatably connected to the rotating cylinder 8; the front baffle 61 is set in an "L" shape, and the inner wall of one end of the front baffle 61 is fixedly connected to the limit rod 68, and the outer wall of the limit rod 68 slides It is connected to a bearing plate 64, and the outer wall of the limit rod 68 is sleeved with a return spring 67. The two ends of the return spring 67 are respectively fixedly connected to the side wall of the bearing plate 64 and the inner wall of the front baffle 61; one end of the bearing plate 64 is rotatably connected to a grinding roller 65, and one end of the grinding roller 65 is fixedly connected to a second motor 66. The second motor 66 is fixedly connected to the side wall of one of the bearing plates 64, and the other end of the grinding roller 65 is threadedly connected to a screw 63, and the end of the screw 63 away from the grinding roller 65 is fixedly connected to a hemisphere 62.

[0038] The side grinding assembly 6 removes burrs on the edge of the plate 7: while adjusting the front baffle 61, the distance between the grinding roller 65 and the edge of the plate 7 can be adjusted synchronously so that it contacts the side wall of the plate 7. During the process of removing burrs, the second motor 66 can be started to drive the grinding roller 65 to rotate, and the bearing plate 64 can slide along the limit rod 68. The return spring 67 provides elastic support to make the grinding roller 65 close to the side of the plate 7. When the edge of the plate 7 is uneven, the grinding roller 65 can ensure uniform grinding. At the same time, during the reciprocating movement of the fixed plate 57, the connecting plate 59 and the connecting plate 591 are driven to move. At this time, the connecting plate 591 can drive the multiple protrusions 592 below to move left and right, and perform reciprocating sliding extrusion on the hemisphere 62. The screw 63 is fixedly connected to the hemisphere 62. At the same time, the second motor 66 drives the grinding roller 65 to rotate When the hemisphere 62 rotates with the grinding roller 65, it can be ensured that the grinding roller 65 performs a slight axial reciprocating vibration while the grinding roller 65 rotates, thereby enhancing the burr removal effect. When the plate 7 moves in the conveying frame 2, the rotating cylinder 8 assists the plate 7 in moving to avoid shaking during the conveying process. The grinding roller 65 and the grinding plate 56 work simultaneously to achieve full-circle deburring of the surface and edge. The reciprocating motion of the main grinding component 5 and the axial vibration of the side grinding component 6 form a composite motion, so that the burrs are subjected to the dual effects of lateral cutting and axial impact, thereby improving the removal efficiency and reducing the depth of scratches caused by single-direction grinding. When the hemisphere 62 and the protrusion 592 are misaligned with each other and are no longer squeezed, the bearing plate 64 can be driven back to its position by the reset spring 67, and the bearing plate 64 is pressed against the inner wall of the front baffle 61 to avoid shaking.

[0039] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0040] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A fully automatic and efficient deburring device for panels for whole-house customization, comprising a support frame (1) and a conveying frame (2), wherein the conveying frame (2) is connected with an adjustment component (3), a panel (7) and an electric telescopic rod (9), and a rear baffle (4) is provided on the inner side of the conveying frame (2), characterized in that: Also includes: A main body grinding assembly (5), the main body grinding assembly (5) is located above the conveying frame (2), and the main body grinding assembly (5) is used to grind the surface of the plate (7); A side grinding assembly (6), the side grinding assembly (6) is located on the inner side of the conveying frame (2), and the side grinding assembly (6) is used for grinding the side of the plate (7).

2. The fully automatic and efficient deburring device for whole-house customization according to claim 1 is characterized in that: The conveying frame (2) is fixedly connected to the support frame (1), the side wall of the conveying frame (2) is fixedly connected to the electric telescopic rod (9), and the conveying frame (2) is in contact with the plate (7).

3. The fully automatic and efficient deburring device for whole-house customization according to claim 1 is characterized in that: The adjusting components (3) are provided with two groups, and each group of the adjusting components (3) is symmetrically distributed on both sides of the conveying frame (2). Each group of the adjusting components (3) includes a limiting rod (32) and an adjusting rod (33). The outer wall of the limiting rod (32) is provided with a telescopic spring (31). The adjusting rod (33) is threadedly connected to the side wall of the conveying frame (2). One end of the adjusting rod (33) is rotatably connected to the side plate of the rear baffle (4). One end of the limiting rod (32) passes through the side wall of the conveying frame (2) and is fixedly connected to the side wall of the rear baffle (4). The two ends of the telescopic spring (31) are respectively fixedly connected to the side wall of the conveying frame (2) and the side wall of the rear baffle (4).

4. The fully automatic and efficient deburring device for whole-house customization according to claim 3 is characterized in that: The side grinding assembly (6) includes a front baffle (61), one side of the front baffle (61) is rotatably connected to one end of the corresponding adjustment rod (33), the front baffle (61) is fixedly connected to one end of the corresponding limit rod (32), the two ends of the telescopic spring (31) are respectively fixedly connected to the corresponding front baffle (61) and the side wall of the conveying frame (2), and the sides of the front baffle (61) and the rear baffle (4) are rotatably connected to the rotating cylinder (8).

5. The fully automatic and efficient deburring device for whole-house customization according to claim 4 is characterized in that: The front baffle (61) is arranged in an "L" shape, and the inner wall of one end of the front baffle (61) is fixedly connected to a limit rod (68), and the outer wall of the limit rod (68) is slidably connected to a bearing plate (64). The outer wall of the limit rod (68) is provided with a return spring (67), and the two ends of the return spring (67) are respectively fixedly connected to the side wall of the bearing plate (64) and the inner wall of the front baffle (61).

6. The fully automatic and efficient deburring device for whole-house customization according to claim 5 is characterized in that: One end of the bearing plate (64) is rotatably connected to a grinding roller (65), one end of the grinding roller (65) is fixedly connected to a second motor (66), the second motor (66) is fixedly connected to the side wall of one of the bearing plates (64), the other end of the grinding roller (65) is threadedly connected to a screw (63), and the end of the screw (63) away from the grinding roller (65) is fixedly connected to a hemisphere (62).

7. The fully automatic and efficient deburring device for whole-house customization according to claim 6 is characterized in that: The main body grinding assembly (5) includes a support plate (51), the support plate (51) is fixedly connected to one end of the electric telescopic rod (9) away from the conveying frame (2), and symmetrically distributed sliding slot holes (53) are opened on both sides of the support plate (51). The inner wall of the sliding slot hole (53) is fixedly connected to a sliding rod (54), and the outer wall of the sliding rod (54) is sleeved with a vertical plate (55), and the vertical plate (55) is slidably connected to the inner wall of the sliding slot hole (53).

8. The fully automatic and efficient deburring device for whole-house customization according to claim 7 is characterized in that: The main body grinding assembly (5) further comprises a first motor (52) and a rotating plate (581), wherein the first motor (52) is fixedly connected to the support plate (51), one end of the first motor (52) is fixedly connected to a transmission shaft (58), an end of the transmission shaft (58) away from the first motor (52) is fixedly connected to the rotating plate (581), and a side wall of the rotating plate (581) is fixedly connected to a transmission rod (582).

9. The fully automatic and efficient deburring device for whole-house customization according to claim 8 is characterized in that: The main body grinding assembly (5) further comprises a fixed plate (57), wherein the fixed plate (57) is fixedly connected to one end of the vertical plate (55) away from the support plate (51), the lower side wall of the fixed plate (57) is fixedly connected to the grinding plate (56), the upper side wall of the fixed plate (57) is provided with a groove (571) for sliding with the transmission rod (582), the upper side wall of the fixed plate (57) is fixedly connected to a connecting plate (59), the connecting plate (59) is arranged in an "L" shape, one end of the connecting plate (59) is provided with a connecting plate (591), the connecting plate (591) is located above the hemisphere (62), the side wall of the connecting plate (591) is fixedly connected to a plurality of protrusions (592), and the protrusions (592) are slidably connected to the hemisphere (62).