A die-casting cleaning device with self-cleaning function

Abstract

The present invention discloses a die-casting cleaning device with a self-cleaning function, which relates to the field of casting technology and includes: a processing body, the processing body is composed of two cylindrical cavities, a slideway is arranged at the bottom of the cylindrical cavity, a clamping assembly is arranged between the two cylindrical cavities, and a cleaning assembly is arranged in the cylindrical cavity; Place the die-casting into the clamping assembly, and then the clamping assembly drives the die-casting to move towards one side close to the cylindrical cavity. When the axis of the clamping assembly coincides with the axis of the cylindrical cavity, at this time the axis of the die-casting also coincides with the axis of the cylindrical cavity. Subsequently, the two cylindrical cavities move towards the side close to the die-casting, so that the die-casting is surrounded by the two cylindrical cavities and the clamping assembly. Finally, the controller controls the cleaning assembly to start, and the cleaning assembly immediately cleans the surface of the die-casting, cleaning the burrs on the surface of the die-casting, making the surface of the die-casting flat, and thereby improving the cleanliness of the surface of the die-casting.

Description

Technical Field

[0001] The present invention relates to the field of casting technology, and specifically to a cleaning device for die-cast parts with self-cleaning function. Background Art

[0002] Die-cast parts are parts formed by die casting. A die-casting machine, which is a pressure casting machine equipped with a die-casting mold, is used to pour molten metals such as copper, zinc, aluminum, or aluminum alloy heated to a liquid state into the feed inlet of the die-casting machine. Through die-casting by the die-casting machine, copper, zinc, aluminum parts, or aluminum alloy parts with shapes and sizes restricted by the mold are cast. Such parts are usually called die-cast parts. During the stamping process, due to the gap between the punch and the lower die on the stamping die, or the gap between the cutting tools at the cutting edge, and the easy generation of burrs due to mold wear, the shape of the stamping burrs varies according to the material of the plate, the thickness of the plate, the gap between the upper and lower dies, the shape of the stamping parts, etc. And burrs on die-cast parts are usually difficult to avoid, so deburring treatment is required for die-cast parts.

[0003] The cleaning of die-cast part blanks is still carried out manually using files, resulting in difficult cleaning, high labor intensity, low production efficiency, and easy damage to the surface of the blanks during manual cleaning, affecting the appearance quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a cleaning device for die-cast parts with self-cleaning function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A cleaning device for die-cast parts with self-cleaning function, comprising: a processing body, the processing body consists of two cylindrical cavities, an input port is provided on one side where the two cylindrical cavities face each other, a slideway is provided at the bottom of the cylindrical cavity, the cylindrical cavity slides on the slideway, a clamping assembly is provided between the two cylindrical cavities, and a cleaning assembly is provided inside the cylindrical cavity;

[0007] Place the die-cast part into the clamping assembly, then the clamping assembly drives the die-cast part to move. The clamping assembly moves towards the side close to the cylindrical cavity. When the axis of the clamping assembly coincides with the axis of the cylindrical cavity, at this time, the axis of the die-cast part also coincides with the axis of the cylindrical cavity. Then the two cylindrical cavities move towards the side close to the die-cast part, so that the die-cast part is surrounded by the two cylindrical cavities and the clamping assembly. Finally, the controller controls the cleaning assembly to start, and the cleaning assembly immediately cleans the surface of the die-cast part, cleaning the burrs on the surface of the die-cast part, making the surface of the die-cast part flat, thereby improving the cleanliness of the surface of the die-cast part.

[0008] Preferably, the clamping assembly is composed of a fixed body and a rotating body. The fixed body is rotatably connected to the rotating body. The fixed body is arranged on one side of the slideway. A rotating motor is arranged inside the fixed body, and the drive shaft of the rotating motor is connected to the rotating body.

[0009] Preferably, a clamping ring is arranged on the side of the rotating body away from the fixed body. A plurality of auxiliary plates are arranged inside the clamping ring. A push cylinder is arranged in the inner wall of the clamping ring. The push rod of the push cylinder is connected to the auxiliary plate, and the auxiliary plate is arc-shaped.

[0010] Preferably, a rotating groove is arranged at the center of the auxiliary plate. A plurality of conveying wheels are rotatably connected in the rotating groove. The conveying wheels are rotatably connected to the rotating groove. A first motor is arranged in the rotating groove, and the drive shaft of the first motor is connected to the conveying wheels.

[0011] Before the die-casting part is clamped, the clamping ring disengages from between the two cylindrical cavities; then, after the staff sends the die-casting part into the clamping ring, the controller controls the push cylinder to start. The push rod of the push cylinder immediately drives the auxiliary plate to move. A plurality of auxiliary plates move towards the side close to the die-casting part. During the movement of the auxiliary plates, the auxiliary plates drive the conveying wheels to move, so that the conveying wheels contact the surface of the die-casting part during the movement, thereby clamping the surface of the die-casting part.

[0012] Subsequently, the controller controls the rotation of the rotating motor in the fixed body. The drive shaft in the rotating motor drives the rotating body to rotate. The rotating body rotates towards the processing body, and the clamping ring immediately drives the die-casting part to rotate towards the cylindrical cavity, so that the die-casting part rotates to between the two cylindrical cavities. When the axis of the clamping assembly coincides with the axis of the cylindrical cavity, at this time, the axis of the die-casting part also coincides with the axis of the cylindrical cavity. Subsequently, the controller controls the cylindrical cavity to move along the slideway, and the two cylindrical cavities then move towards each other. Finally, the two cylindrical cavities respectively contact the surfaces of the two air supply rings. Furthermore, the two cylindrical cavities and the clamping ring cooperate with each other to surround the die-casting part, avoiding debris overflow during the surface cleaning of the die-casting part, thereby affecting the environment during the cleaning of the die-casting part and causing damage to the physical and mental health of the staff.

[0013] Preferably, the cleaning assembly includes: cleaning holes. The number of the cleaning holes is several. The several cleaning holes are arranged around the axis of the cylindrical cavity. An air suction pipe is arranged in the cleaning hole. A storage box is arranged outside the circular cavity. The air suction pipe is connected to the storage box through a pipeline. Filter holes are arranged on the storage box. A sliding ring is also arranged in the cleaning hole. A rotating block is arranged on the side of the sliding ring close to the cleaning hole. A plurality of springs are arranged between the sliding ring and the rotating block. One side of the spring is connected to the sliding ring, and the other side of the spring is connected to the rotating block. The sliding ring is a magnetic conductor. An electromagnet is arranged on the side of the cleaning hole away from the spring, and an electromagnetic coil is arranged in the inner wall of the cleaning hole.

[0014] Preferably, the sliding ring is slidably connected to the cleaning hole, and a plurality of cleaning brushes are arranged on one side of the sliding ring away from the cleaning hole, and the plurality of cleaning brushes are arranged around the axis of the sliding ring.

[0015] Preferably, a plurality of extension strips are arranged on one side of the air suction pipe close to the cleaning brush, and the diameter of the extension strip is larger than the diameter of the air suction pipe.

[0016] Preferably, air delivery rings are arranged on one side of the clamping ring close to the cylindrical cavity, air delivery ports are arranged on the air delivery rings, and the air delivery ports are connected to an air pump through pipelines.

[0017] After the die-casting part is surrounded by the cylindrical cavity and the clamping ring, the controller controls the electromagnet in the cleaning hole to be powered off. Then, after the electromagnet is powered off, it loses its magnetic force, and the sliding ring immediately loses the attraction of the magnetic force. Then, the sliding ring moves under the action of the spring elastic force. The sliding ring moves to the side away from the cleaning hole. When the sliding ring moves, it drives the cleaning brush to move. The cleaning brush extends from the cleaning hole into the cylindrical cavity, and the extended cleaning brush contacts the surface of the die-casting part.

[0018] Subsequently, the controller controls the electromagnetic coil in the inner wall of the cleaning hole to be powered on. Since the sliding ring is a magnetic conductor, the sliding ring generates a rotational force under the influence of the magnetic force of the electromagnetic coil. Then, the sliding ring rotates around the axis of the cleaning hole. When the sliding ring rotates, it drives the cleaning brush to rotate. When the cleaning brush rotates, it grinds and cleans the burrs on the surface of the die-casting part.

[0019] During the grinding process of the die-casting part, the controller controls the first motor to start. The driving shaft of the first motor drives the conveying wheel to rotate. When the conveying wheel rotates, it frictionally contacts the surface of the die-casting part. Then, the die-casting part moves along the axis of the cylindrical cavity under the action of the frictional force. The controller controls the first motor to reciprocate during this process, so that the die-casting part reciprocates along the axis of the cylindrical cavity in the two cylindrical cavities. During the movement of the die-casting part, the area clamped by the auxiliary plate will also enter the cylindrical cavity for cleaning, so that the die-casting part is cleaned without dead corners, thereby improving the cleaning effect of the die-casting part.

[0020] During the cleaning process of the die-casting part, the controller controls the air pump starting cabinet. The air pump extracts external air and transports it through pipelines to the air delivery ring, and finally transports it to the input port through the air delivery port. The air is transported to the cylindrical cavity through the input port. The air flows in the gap between the cylindrical cavity and the die-casting part. Since both the rotation of the electromagnetic coil and the cleaning of the cleaning brush will generate a large amount of heat, after the gas is input, it will carry the heat out, realizing the cooling treatment of the die-casting part and the inside of the cylindrical cavity. The output air carries heat and debris generated by cleaning and transports them to the air suction pipe, and is transported to the storage box through the air suction pipe. After being filtered by the filter screen, the debris is stored in the storage box.

[0021] After the cleaning is completed, the controller controls the electromagnet in the cleaning hole to be energized, so that the electromagnet attracts the sliding ring, and the sliding ring moves towards the side close to the cleaning hole. When the sliding ring moves, it drives the cleaning brush to move. During the process of the cleaning brush shrinking towards the cleaning hole, the cleaning brush encounters the expansion strip, causing the cleaning brush to separate under the action of the expansion strip, and then the debris remaining between the cleaning brushes falls off, thus realizing the self-cleaning effect of the cleaning brush, avoiding the accumulation of debris in the cylindrical cavity or the cleaning hole, which affects the normal operation of the equipment, thereby improving the cleanliness inside the cylindrical cavity and the stability of the equipment operation;

[0022] After self-cleaning, the cylindrical cavity moves towards the opposite side, so that the die casting is separated from the two cylindrical cavities, and finally the rotating body drives the die casting to separate from between the two cylindrical cavities.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The two cylindrical cavities move towards each other, and finally the two cylindrical cavities are respectively in contact with the surfaces of the two air delivery rings. Then, the two cylindrical cavities and the clamping ring cooperate with each other to surround the die casting, avoiding the overflow of debris during the surface cleaning of the die casting, which affects the environment during the die casting cleaning process and causes damage to the physical and mental health of the staff.

[0025] 2. After the cleaning is completed, the controller controls the electromagnet in the cleaning hole to be energized, so that the electromagnet attracts the sliding ring, and the sliding ring moves towards the side close to the cleaning hole. When the sliding ring moves, it drives the cleaning brush to move. During the process of the cleaning brush shrinking towards the cleaning hole, the cleaning brush encounters the expansion strip, causing the cleaning brush to separate under the action of the expansion strip, and then the debris remaining between the cleaning brushes falls off, thus realizing the self-cleaning effect of the cleaning brush, avoiding the accumulation of debris in the cylindrical cavity or the cleaning hole, which affects the normal operation of the equipment, thereby improving the cleanliness inside the cylindrical cavity and the stability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of the present invention;

[0027] Figure 2 is a structural schematic diagram of the clamping assembly;

[0028] Figure 3 is a front view of the clamping assembly;

[0029] Figure 4 is a structural schematic diagram of the cylindrical cavity;

[0030] Figure 5 is a sectional structural schematic diagram of the present invention;

[0031] Figure 6 is an internal front view of the present invention;

[0032] Figure 7 Schematic structural diagrams of the cleaning hole, air suction pipe and sliding ring of the present invention;

[0033] Figure 8 Schematic structural diagram of the sliding ring and cleaning brush.

[0034] In the figure: 1, processing body; 11, cylindrical cavity; 12, input port; 13, slideway;

[0035] 2, clamping assembly; 21, fixed body; 22, rotating body; 23, clamping ring; 24, auxiliary plate; 25, rotating groove; 26, conveying wheel; 27, air delivery ring;

[0036] 3, cleaning assembly; 31, cleaning hole; 32, air suction pipe; 321, extension bar; 33, sliding ring; 331, rotating block. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment: As Figures 1 - 8 shown, the present invention provides a technical solution for a die-casting cleaning device with a self-cleaning function, including: a processing body 1, the processing body 1 is composed of two cylindrical cavities 11, an input port 12 is arranged on one side where the two cylindrical cavities 11 face each other, a slideway 13 is arranged at the bottom of the cylindrical cavity 11, the cylindrical cavity 11 slides on the slideway 13, a clamping assembly 2 is arranged between the two cylindrical cavities 11, and a cleaning assembly 3 is arranged in the cylindrical cavity 11.

[0039] As a specific implementation manner of the present invention, the clamping assembly 2 is composed of a fixed body 21 and a rotating body 22, the fixed body 21 is rotatably connected to the rotating body 22, the fixed body 21 is arranged on one side of the slideway 13, a rotating motor is arranged in the fixed body 21, and a driving shaft of the rotating motor is connected to the rotating body 22.

[0040] As a specific implementation manner of the present invention, a clamping ring 23 is arranged on the side of the rotating body 22 away from the fixed body 21, a plurality of auxiliary plates 24 are arranged in the clamping ring 23, a push cylinder is arranged in the inner wall of the clamping ring 23, a push rod of the push cylinder is connected to the auxiliary plate 24, and the auxiliary plate 24 is arc-shaped.

[0041] As a specific embodiment of the present invention, a rotation groove 25 is provided at the center of the auxiliary plate 24. A plurality of conveying wheels 26 are rotatably connected in the rotation groove 25. The conveying wheels 26 are rotatably connected to the rotation groove 25. A first motor is provided in the rotation groove 25, and the driving shaft of the first motor is connected to the conveying wheels 26.

[0042] As a specific embodiment of the present invention, the cleaning assembly 3 includes: cleaning holes 31. The number of the cleaning holes 31 is several, and several of the cleaning holes 31 are arranged around the axis of the cylindrical cavity 11. An air suction pipe 32 is provided in the cleaning holes 31. A storage box is provided outside the circular cavity 11. The air suction pipe 32 is connected to the storage box through a pipeline. Filter holes are provided on the storage box. A sliding ring 33 is further provided in the cleaning holes 31. A rotating block 331 is provided on the side of the sliding ring 33 close to the cleaning holes 31. A plurality of springs are provided between the sliding ring 33 and the rotating block 331. One side of the springs is connected to the sliding ring 33, and the other side of the springs is connected to the rotating block 331. The sliding ring 33 is a magnetic conductor. An electromagnet is provided on the side of the cleaning holes 31 away from the springs, and an electromagnetic coil is provided on the inner wall of the cleaning holes 31.

[0043] As a specific embodiment of the present invention, the sliding ring 33 is slidably connected to the cleaning holes 31. A plurality of cleaning brushes are provided on the side of the sliding ring 33 away from the cleaning holes 31, and several of the cleaning brushes are arranged around the axis of the sliding ring 33.

[0044] As a specific embodiment of the present invention, a plurality of extension strips 321 are provided on the side of the air suction pipe 32 close to the cleaning brushes, and the diameter of the extension strips 321 is larger than the diameter of the air suction pipe 32.

[0045] As a specific embodiment of the present invention, an air delivery ring 27 is provided on the side of the clamping ring 23 close to the cylindrical cavity 11. Air delivery ports are provided on the air delivery ring 27, and the air delivery ports are connected to an air pump through pipelines.

[0046] The working principle of the present invention:

[0047] Before the die-casting part is clamped, the clamping ring 23 disengages from between the two cylindrical cavities 11. Subsequently, after the staff places the die-casting part into the clamping ring 23, the controller controls the push cylinder to start. The push rod of the push cylinder then drives the auxiliary plate 24 to move. A plurality of auxiliary plates 24 move towards the side close to the die-casting part. During the movement of the auxiliary plate 24, the auxiliary plate 24 drives the conveying wheels 26 to move, so that the conveying wheels 26 contact the surface of the die-casting part during the movement, thereby clamping the surface of the die-casting part.

[0048] Subsequently, the controller controls the driving of the rotating motor within the fixed body 21. The drive shaft in the rotating motor drives the rotating body 22 to rotate. The rotating body 22 rotates towards the processing body 1, and the clamping ring 23 then drives the die casting towards the cylindrical cavity 11 to rotate, causing the die casting to rotate between the two cylindrical cavities 11. When the axis of the clamping assembly 2 coincides with the axis of the cylindrical cavity 11, at this time, the axis of the die casting also coincides with the axis of the cylindrical cavity 11. Subsequently, the controller controls the cylindrical cavity 11 to move along the slideway 13, and the two cylindrical cavities 11 then move towards each other. Finally, the two cylindrical cavities 11 respectively come into contact with the surfaces of the two air delivery rings 27. Furthermore, the two cylindrical cavities 11 and the clamping ring 23 cooperate with each other to surround the die casting, preventing debris from spilling out during the surface cleaning of the die casting, thus affecting the environment during the cleaning process of the die casting and causing damage to the physical and mental health of the staff;

[0049] After the die casting is surrounded by the cylindrical cavity 11 and the clamping ring 23, the controller controls the electromagnet in the cleaning hole 31 to be powered off. Then, after the electromagnet is powered off, it loses its magnetic force, and the sliding ring 33 immediately loses the attraction of the magnetic force. Furthermore, the sliding ring 33 moves under the action of the spring elastic force. The sliding ring 33 moves towards the side away from the cleaning hole 31. When the sliding ring 33 moves, it drives the cleaning brush to move, and the cleaning brush extends from the cleaning hole 31 into the interior of the cylindrical cavity 11. The extended cleaning brush comes into contact with the surface of the die casting;

[0050] Subsequently, the controller controls the electromagnetic coil in the inner wall of the cleaning hole 31 to be energized. Since the sliding ring 33 is a magnetic conductor, the sliding ring 33 generates a rotational force under the influence of the magnetic force of the electromagnetic coil. The sliding ring 33 then rotates around the axis of the cleaning hole 31 in a self-rotation motion. When the sliding ring 33 rotates, it drives the cleaning brush to rotate, and the cleaning brush rotates to polish and clean the burrs on the surface of the die casting;

[0051] During the polishing process of the die casting, the controller controls the first motor to start. The drive shaft of the first motor drives the conveying wheel 26 to rotate. When the conveying wheel 26 rotates, it frictionally contacts the surface of the die casting. Furthermore, the die casting moves along the axis of the cylindrical cavity 11 under the action of the frictional force. The controller controls the first motor to reciprocate during this process, causing the die casting to reciprocate along the axis of the cylindrical cavity 11 within the two cylindrical cavities 11. During the movement of the die casting, the area clamped by the auxiliary plate 24 will also enter the cylindrical cavity 11 for cleaning, enabling the die casting to be cleaned without dead angles, thereby improving the cleaning effect of the die casting;

[0052] During the cleaning process of the die-cast part, the controller controls the air pump starting cabinet. The air pump extracts external air and transports it through a pipeline to the air delivery ring 27, and finally delivers it to the input port 12 through the air outlet. The air is delivered to the cylindrical cavity 11 through the input port 12. The air flows in the gap between the cylindrical cavity 11 and the die-cast part. Since both the rotation of the electromagnetic coil and the cleaning by the cleaning brush generate a large amount of heat, after the gas is input, the heat is carried away and output, realizing the cooling treatment of the die-cast part and the inside of the cylindrical cavity 11. The output air carries heat and debris generated by cleaning and is transported to the suction pipe 32, and then transported to the storage box through the suction pipe 32. After being filtered by the filter screen, the debris is stored in the storage box;

[0053] When the cleaning is completed, the controller controls the electromagnet in the cleaning hole 31 to be energized. Then, the electromagnet attracts the sliding ring 33, and the sliding ring 33 moves towards the side close to the cleaning hole 31. When the sliding ring 33 moves, it drives the cleaning brush to move. During the process of the cleaning brush shrinking towards the cleaning hole 31, the cleaning brush encounters the expansion strip 321, causing the cleaning brush to separate under the action of the expansion strip 321. Then, the debris remaining between the cleaning brushes falls off, thus realizing the self-cleaning effect of the cleaning brush, avoiding the accumulation of debris in the cylindrical cavity 11 or the cleaning hole 31, and further affecting the normal operation of the equipment;

[0054] After self-cleaning, the cylindrical cavity 11 moves to the opposite side, causing the die-cast part to separate from the two cylindrical cavities 11. Finally, the rotating body 22 drives the die-cast part to separate from between the two cylindrical cavities 11.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A die casting cleaning device with self-cleaning function, characterized in that: A processing body (1), the processing body (1) is composed of two cylindrical cavities (11), an input port (12) is arranged on opposite sides of the two cylindrical cavities (11), a slideway (13) is arranged at the bottom of the cylindrical cavity (11), the cylindrical cavity (11) slides on the slideway (13), a clamping component (2) is arranged between the two cylindrical cavities (11), and a cleaning component (3) is arranged in the cylindrical cavity (11); The clamping assembly (2) is composed of a fixed body (21) and a rotating body (22), and a clamping ring (23) is provided on a side of the rotating body (22) away from the fixed body (21); The cleaning assembly (3) comprises: a cleaning hole (31), the number of the cleaning holes (31) is several, the several cleaning holes (31) are arranged around the axis of the cylindrical cavity (11), an air suction pipe (32) is arranged in the cleaning hole (31), a storage box is arranged outside the cylindrical cavity (11), the air suction pipe (32) is connected to the storage box through a pipeline, the storage box is provided with a filter hole, a sliding ring (33) is also arranged in the cleaning hole (31), a rotating block (331) is arranged on the side of the sliding ring (33) close to the cleaning hole (31), a plurality of springs are arranged between the sliding ring (33) and the rotating block (331), one side of the spring is connected to the sliding ring (33), and the other side of the spring is connected to the rotating block (331), the sliding ring (33) is a magnetic conductor, an electromagnet is arranged on the side of the cleaning hole (31) away from the spring, and an electromagnetic coil is arranged in the inner wall of the cleaning hole (31); The sliding ring (33) is slidably connected to the cleaning hole (31); a plurality of cleaning brushes are arranged on a side of the sliding ring (33) away from the cleaning hole (31); and the plurality of cleaning brushes are arranged around the axis of the sliding ring (33); A plurality of extension strips (321) are arranged on one side of the air suction pipe (32) close to the cleaning brush, and the diameter of the extension strips (321) is larger than the diameter of the air suction pipe (32); An air delivery ring (27) is provided on one side of the clamping ring (23) close to the cylindrical cavity (11), and an air delivery port is provided on the air delivery ring (27), and the air delivery port is connected to an air pump via a pipeline.

2. The die casting cleaning device with self-cleaning function according to claim 1, characterized in that: The fixed body (21) is rotatably connected to the rotating body (22); the fixed body (21) is arranged on one side of the slideway (13); a rotating motor is arranged inside the fixed body (21); and a driving shaft of the rotating motor is connected to the rotating body (22).

3. The die casting cleaning device with self-cleaning function according to claim 2, characterized in that: A plurality of auxiliary plates (24) are arranged in the clamping ring (23), a push cylinder is arranged in the inner wall of the clamping ring (23), a push rod of the push cylinder is connected to the auxiliary plates (24), and the auxiliary plates (24) are arc-shaped.

4. The die casting cleaning device with self-cleaning function according to claim 3, characterized in that: A rotating groove (25) is arranged at the center of the auxiliary plate (24), a plurality of conveying wheels (26) are rotatably connected in the rotating groove (25), the conveying wheels (26) are rotatably connected to the rotating groove (25), a No. 1 motor is arranged in the rotating groove (25), and a driving shaft of the No. 1 motor is connected to the conveying wheels (26).

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