A machine for cutting excess material of pouring and riser of investment casting

Abstract

The present invention relates to the technical field of pouring and riser cutting machines, and discloses a machine for cutting surplus material of pouring and riser of investment castings, comprising a cutting machine body, a cutting mechanism installed on the top of the inner side of the cutting machine body, a base fixedly connected to one side of the cutting machine body, loading and unloading slots opened at both ends of the cutting machine body close to the base, the two loading and unloading slots are respectively located on both sides of the base, a plurality of protective curtains are fixedly connected to the top of the loading and unloading slots, a waste material collection bin is fixedly connected to one end of the cutting machine body, a motor is fixedly connected to the inside of the base, and a turntable is fixedly connected to the output end of the motor. This machine for cutting surplus material of pouring and riser of investment castings is provided with a plurality of permanent magnet clamps for fixing castings, and when the cutting machine body cuts the pouring and riser of a casting on one of the permanent magnet clamps, the staff can load and unload castings on other permanent magnet clamps, thereby saving the time of the cutting machine body waiting for the casting to be replaced, and improving the production efficiency of the cutting machine body.

Description

Technical Field

[0001] The invention relates to the technical field of pouring and riser cutting machines, in particular to a pouring and riser excess material cutting machine for investment castings. Background Art

[0002] In the investment casting process, the molten metal in the mold needs to flow into the mold cavity through the gate, and the gas generated during the pouring process needs to be discharged through the riser. However, after the casting solidifies, the riser part needs to be cut off or polished off to obtain the final casting product. At present, casting riser cutting machines are often used to cut the riser excess on the casting to improve the yield and quality of the casting.

[0003] As in the prior art, the patent authorization announcement CN216989828U discloses a five-axis cradle workbench automatic cutting machine, including a base, an X-axis moving assembly is installed on the base, a mounting plate is slidably connected to the X-axis moving assembly, a Y-axis moving assembly is provided on the mounting plate, a cradle-type workbench is slidably connected to the Y-axis moving assembly, a horizontal rotating seat is provided at the mounting seat, cradle shafts are connected to both sides of the mounting seat, the cradle shafts are connected to the rotary motor, and a Z-axis moving assembly is installed on the base. This five-axis cradle workbench automatic cutting machine, through the setting of the X-axis motor, the Y-axis motor, the Z-axis motor, the rotary motor and the rotary cylinder, realizes the forward and backward, left and right, up and down movement of the workpiece clamping platform, as well as horizontal and vertical rotation, realizes all-round precise cutting, can complete the one-time continuous cutting of multiple pouring and riser positions of the casting, and adopts motor control throughout the process, without manual participation, thereby improving the production efficiency and operation safety of this process.

[0004] Although the cutting machine in the above patent can achieve all-round precise cutting, it still has certain defects; since the cutting machine has only one clamp, during the cutting process, if the clamp fails or the casting needs to be replaced, the cutting machine will be in a waiting state, which reduces production efficiency. Therefore, the existing cutting machine needs to be improved to improve production efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a machine for cutting excess material from pouring and riser heads of investment castings to solve the problems raised in the background art and to improve the production efficiency of the cutting machine body.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a machine for cutting excess material from pouring and riser of investment castings, comprising a cutting machine body, a cutting mechanism is installed on the top of the inner side of the cutting machine body, one side of the cutting machine body is fixedly connected to a base, both ends of the cutting machine body close to the base are provided with loading and unloading slots, the two loading and unloading slots are respectively located on both sides of the base, a plurality of protective curtains are fixedly connected to the top of the loading and unloading slots, one end of the cutting machine body is fixedly connected to a waste collection bin, the inside of the base is fixedly connected to a motor, and the output of the motor A turntable is fixedly connected to the output end, and three connecting rods distributed at equal angles are connected to the outer wall of the turntable, a battery is fixedly connected to the inside of the connecting rod, an electro-permanent magnetic clamp is fixedly connected to the top of the connecting rod away from the turntable, and a button switch is fixedly connected to the bottom of the connecting rod away from the turntable, the battery is electrically connected to the button switch, and the button switch is electrically connected to the electro-permanent magnetic clamp, a flip assembly is provided at the end of the connecting rod close to the turntable, a limit assembly matching the connecting rod is provided inside the turntable, and a cleaning assembly is connected to one side of the outer wall of the base.

[0007] Furthermore, the flipping assembly includes a flipping gear and a flipping rack plate, the flipping gear is fixedly connected to one end of the connecting rod close to the turntable, the flipping rack plate is arc-shaped, the flipping rack plate is fixedly connected to the top of the base, the flipping rack plate is meshed with the flipping gear, and the flipping rack plate is located on both sides of the cleaning assembly.

[0008] Furthermore, the limit assembly includes an anti-slip block, a limit block, a limit column, an outward push elastic piece and a guide block. The upper end and the lower end of the anti-slip block away from the connecting rod are provided with limit grooves matching the limit block. The limit block is slidably connected to the turntable. The end of the limit block away from the connecting rod is slidably connected to the limit column fixed to the turntable. The outward push elastic piece is sleeved on the end of the limit column away from the limit block. The bottom of the guide block is fixedly connected to the top of the base. The guide block is arc-shaped, and the guide block matches the lower end of the limit block.

[0009] Furthermore, the cleaning assembly includes a cleaning frame, two pressing blocks and multiple bottom cleaning brushes, the cleaning frame is connected to the base, the two pressing blocks are respectively connected to the two ends of the cleaning frame, the bottom cleaning brush is located between the two pressing blocks, and the bottom cleaning brushes are equidistantly distributed, and the upper end of the bottom cleaning brush is conical.

[0010] Furthermore, three push plates distributed at equal angles are fixedly connected to the outer wall of the turntable, the push plates and the connecting rods are staggered, and a dust cleaning brush is fixedly connected to one side of the push plates.

[0011] Furthermore, the top of the lower pressing block is wavy, and a T-shaped support column is fixed to the bottom of the lower pressing block. A sleeve is provided on the outside of the lower end of the support column, and the sleeve is fixed to the cleaning frame. An upper pull-up elastic member is provided on the outer wall of the support column, and the upper end of the upper pull-up elastic member is fixed to the top of the sleeve, and the lower end of the upper pull-up elastic member is fixed to the support column.

[0012] Furthermore, slide grooves are provided on both sides of the cleaning frame, and positioning columns are fixedly connected to the inside of the slide grooves. The end of the positioning column away from the base is sleeved with a sliding block matching the slide groove, and the side of the sliding block away from the cleaning frame is fixedly connected to a connecting plate, and the other end of the connecting plate is fixedly connected to the base, and the end of the positioning column close to the base is sleeved with a reset elastic member, and the side of the base close to the cleaning frame is rotatably connected to a transmission gear, and the lower end of the outer wall of the turntable is fixedly connected to a transmission tooth block matching the transmission gear, and the bottom of the transmission gear is fixedly connected to an extrusion block, and the extrusion block is elliptical.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This investment casting riser excess material cutting machine is provided with a plurality of permanent magnetic fixtures for fixing castings. When the cutting machine body is cutting the riser of a casting on one of the permanent magnetic fixtures, the staff can load and unload castings on other permanent magnetic fixtures, thus saving the time of the cutting machine body waiting for the casting to be replaced and improving the production efficiency of the cutting machine body.

[0015] 2. This type of investment casting riser excess material cutting machine, when the cutting machine body completes the riser cutting of the casting, the motor will drive the turntable to rotate. During the rotation of the turntable, the flip assembly will flip the processed casting over to avoid waste chips and waste materials being on the permanent magnetic fixture, which will make it difficult for workers to load and unload materials.

[0016] 3. For this type of investment casting riser excess material cutting machine, when the electric permanent magnetic fixture and the casting pass through the cleaning component position after being turned over by the turntable, the cleaning component will clean the surface of the casting and the electric permanent magnetic fixture to reduce the probability of dust and waste chips adhering to the surface of the casting or the electric permanent magnetic fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 A partial cross-sectional view of the present invention as a whole;

[0019] Figure 3 It is a schematic diagram of the structure of the base, the rotating disk and the cleaning frame of the present invention when they are unfolded;

[0020] Figure 4A partial cross-sectional view of the base of the present invention;

[0021] Figure 5 For the present invention Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0022] Figure 6 It is a structural schematic diagram of the cleaning frame of the present invention;

[0023] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at B in the middle;

[0024] Figure 8 It is a structural schematic diagram of the connecting rod of the present invention.

[0025] In the figure: 1. Cutting machine body; 2. Cutting mechanism; 3. Protective curtain; 4. Base; 5. Waste collection bin; 6. Motor; 7. Turntable; 8. Anti-slip block; 9. Flip gear; 10. Connecting rod; 11. Electro-permanent magnetic fixture; 12. Battery; 13. Push button switch; 14. Limiting groove; 15. Limiting block; 16. Limiting column; 17. Outward push elastic member; 18. Guide block; 19. Flip rack plate; 20. Push plate; 21. Dust cleaning brush; 22. Transmission gear block; 23. Transmission gear; 24. Extrusion block; 25. Connecting plate; 26. Sliding block; 27. Cleaning frame; 28. Slide; 29. ​​Positioning column; 30. Reset elastic member; 31. Pressing block; 32. Bottom cleaning brush; 33. Sleeve; 34. Support column; 35. Pull-up elastic member. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0027] See also Figures 1 to 8A machine for cutting excess material from a pouring riser of an investment casting, comprising a cutting machine body 1, a cutting mechanism 2 is installed on the top of the inner side of the cutting machine body 1, a base 4 is fixedly connected to one side of the cutting machine body 1, loading and unloading slots are provided at both ends of the cutting machine body 1 close to the base 4, the two loading and unloading slots are respectively located on both sides of the base 4, a plurality of protective curtains 3 are fixedly connected to the top of the loading and unloading slots, a waste material collecting bin 5 is fixedly connected to one end of the cutting machine body 1, a motor 6 is fixedly connected to the inside of the base 4, a turntable 7 is fixedly connected to the output end of the motor 6, and the outer wall of the turntable 7 is connected to There are three connecting rods 10 distributed at equal angles, a battery 12 is fixedly connected inside the connecting rod 10, an electro-permanent magnetic clamp 11 is fixedly connected to the top of the connecting rod 10 away from the turntable 7, a button switch 13 is fixedly connected to the bottom of the connecting rod 10 away from the turntable 7, the battery 12 is electrically connected to the button switch 13, the button switch 13 is electrically connected to the electro-permanent magnetic clamp 11, a flip assembly is provided at the end of the connecting rod 10 close to the turntable 7, a limit assembly matching the connecting rod 10 is provided inside the turntable 7, and a cleaning assembly is connected to one side of the outer wall of the base 4.

[0028] The investment casting riser excess material cutting machine of the present invention, when working, the worker first places the casting on the electric permanent magnetic clamp 11, then presses the button switch 13 to start the electric permanent magnetic clamp 11, and clamps and fixes the casting by the electric permanent magnetic clamp 11, and then starts the motor 6 and the cutting mechanism 2 through the control system of the cutting machine body 1, the motor 6 will work intermittently (the intermittent time is the time required for the cutting mechanism 2 to cut the casting riser), and each time the motor 6 works, it will drive the turntable 7 to rotate 120° (this angle is the angle between adjacent electric permanent magnetic clamps 11. Since the example given in the present invention is that the equipment has three connecting rods 10 and three electric permanent magnetic clamps 11, the motor 6 will drive the turntable 7 to rotate 120° each time it works), so that the casting can enter the interior of the cutting machine body 1, and the cutting mechanism 2 will cut the casting riser under the control of the control system. After the cutting is completed, the motor 6 will drive the turntable 7 to rotate 120° again. The turntable 7 rotates one station, and during this process, the flipping assembly will flip the connecting rod 10 over. Since the casting is fixed on the electro-permanent magnetic clamp 11, the casting will also flip over accordingly. The flipped assembly casting will pass through the cleaning assembly, and after the casting passes through the cleaning assembly, it will be flipped back to its original state by the flipping assembly. At this time, the worker will replace the casting, and while the worker is replacing the casting, the cutting mechanism 2 will cut the casting inside the cutting machine body 1; since the cutting machine body 1 cuts the casting and the worker replaces the casting at the same time, the time for the cutting machine body 1 to stop and wait for the casting to be replaced is saved, thereby improving the production efficiency of the cutting machine body 1; in addition, the structure of the cutting machine body 1 and the cutting mechanism 2 in the present invention is similar to the prior art, and the patent authorization announcement CN216989828U discloses a five-axis cradle workbench type automatic cutting machine structure, so it will not be elaborated here.

[0029] As a preferred technical solution of the present invention, the flipping assembly includes a flipping gear 9 and a flipping rack plate 19. The flipping gear 9 is fixedly connected to one end of the connecting rod 10 close to the turntable 7. The flipping rack plate 19 is arranged in an arc shape. The flipping rack plate 19 is fixedly connected to the top of the base 4. The flipping rack plate 19 is meshed with the flipping gear 9. The flipping rack plate 19 is located on both sides of the cleaning assembly.

[0030] As a preferred technical solution of the present invention, the limit assembly includes an anti-slip block 8, a limit block 15, a limit column 16, an outward push elastic member 17 and a guide block 18. The upper and lower ends of the anti-slip block 8 away from the connecting rod 10 are provided with limit grooves 14 matching the limit block 15. The limit block 15 is slidably connected to the turntable 7. The end of the limit block 15 away from the connecting rod 10 is slidably connected to the limit column 16 fixed to the turntable 7. The outward push elastic member 17 is sleeved on the end of the limit column 16 away from the limit block 15. The bottom of the guide block 18 is fixed to the top of the base 4. The guide block 18 is arc-shaped, and the guide block 18 matches the lower end of the limit block 15.

[0031] Specifically, when the flip gear 9 is not in contact with the flip rack plate 19, the limit block 15 is located in the limit groove 14, and the connecting rod 10 does not rotate by itself. Before the flip gear 9 is about to contact with the flip rack plate 19, the limit block 15 will contact with the guide block 18, and the limit block 15 will be pushed away from the connecting rod 10 by the guide block 18, thereby causing the limit block 15 to disengage from the limit groove 14. At the same time as the limit block 15 disengages from the limit groove 14, the flip gear 9 will contact with the flip rack plate 19. , thus preventing the connecting rod 10 from rotating in the opposite direction, and after the flip gear 9 contacts the flip rack plate 19, under the push of the turntable 7, the flip gear 9 will roll on the flip rack plate 19, thereby driving the connecting rod 10 to rotate, thereby realizing the flipping of the casting, and when the flip gear 9 is separated from the flip rack plate 19, the limit block 15 is also aligned with the limit groove 14. At this time, under the action of the outward elastic member 17, the limit block 15 will be inserted into the limit groove 14, thereby restricting the connecting rod 10.

[0032] As a preferred technical solution of the present invention, the cleaning component includes a cleaning frame 27, two pressing blocks 31 and multiple bottom cleaning brushes 32. The cleaning frame 27 is connected to the base 4. The two pressing blocks 31 are respectively connected to the two ends of the cleaning frame 27. The bottom cleaning brushes 32 are located between the two pressing blocks 31, and the bottom cleaning brushes 32 are evenly distributed. The upper end of the bottom cleaning brush 32 is conical.

[0033] Specifically, when the connecting rod 10 is flipped over (i.e., when the casting faces downward), the turntable 7 will drive the casting to rotate a certain angle in this state (i.e., the state facing downward). During the rotation at this angle, the bristles on the bottom cleaning brush 32 will contact the casting and the electro-permanent magnetic clamp 11, thereby cleaning the surface of the casting and the electro-permanent magnetic clamp 11, reducing the probability of waste chips or dust adhering to the surface of the casting or the electro-permanent magnetic clamp 11; the conical setting of the bottom cleaning brush 32 makes it difficult for dust to accumulate on the bottom cleaning brush 32, and at the same time, a gap is left between adjacent bottom cleaning brushes 32 to facilitate dust or waste chips to enter the waste collection bin 5.

[0034] As a preferred technical solution of the present invention, three push plates 20 distributed at equal angles are fixedly connected to the outer wall of the turntable 7 , the push plates 20 are staggered with the connecting rods 10 , and a dust cleaning brush 21 is fixedly connected to one side of the push plates 20 .

[0035] Specifically, during the rotation of the turntable 7, the push plate 20 will push the cut pouring spouts and waste chips on the casting into the waste collection bin 5, so that the workers can collect and process them. Since the diameter of the dust is small, it is difficult for the push plate 20 to push the dust. A dust cleaning brush 21 is provided to clean the dust with smaller particles, so that the dust can enter the waste collection bin 5.

[0036] As a preferred technical solution of the present invention, the top of the lower pressing block 31 is wavy, and a T-shaped support column 34 is fixedly connected to the bottom of the lower pressing block 31. A sleeve 33 is sleeved on the outside of the lower end of the support column 34, and the sleeve 33 is fixedly connected to the cleaning frame 27. The outer wall of the support column 34 is sleeved with an upper pull-up elastic member 35, and the upper end of the upper pull-up elastic member 35 is fixedly connected to the top of the sleeve 33, and the lower end of the upper pull-up elastic member 35 is fixedly connected to the support column 34.

[0037] Specifically, when the push plate 20 passes over the cleaning frame 27, since the top of the lower pressing block 31 is wavy, when the push plate 20 moves to the crest of the wave, the lower pressing block 31 will move downward, and when the push plate 20 moves to the trough of the wave, the lower pressing block 31 will be pulled back to its original position by the upper pulling elastic member 35, thereby causing the bottom cleaning brush 32 to vibrate, making it easier for waste materials clamped on the bristles of the bottom cleaning brush 32 to detach from the bottom cleaning brush 32.

[0038] As a preferred technical solution of the present invention, slide grooves 28 are provided on both sides of the cleaning frame 27, and positioning columns 29 are fixedly connected inside the slide grooves 28. The end of the positioning column 29 away from the base 4 is sleeved with a slider 26 matching the slide groove 28, and the side of the slider 26 away from the cleaning frame 27 is fixedly connected to a connecting plate 25, and the other end of the connecting plate 25 is fixedly connected to the base 4. A reset elastic member 30 is sleeved on the end of the positioning column 29 close to the base 4. The side of the base 4 close to the cleaning frame 27 is rotatably connected to a transmission gear 23, and a transmission tooth block 22 matching the transmission gear 23 is fixedly connected to the lower end of the outer wall of the turntable 7. An extrusion block 24 is fixedly connected to the bottom of the transmission gear 23, and the extrusion block 24 is elliptical.

[0039] Specifically, during the rotation of the turntable 7, the transmission tooth block 22 will push the transmission gear 23 to rotate, and the transmission gear 23 will drive the elliptical extrusion block 24 to rotate, so that the extrusion block 24 can periodically squeeze and push the cleaning frame 27. At the same time, when the extrusion block 24 does not squeeze the cleaning frame 27 (that is, the extrusion block 24 is in a state parallel to the end of the cleaning frame 27), the reset elastic member 30 will push the cleaning frame 27 back to its original position, thereby realizing the reciprocating motion of the cleaning frame 27, which has a better effect on cleaning castings and electro-permanent magnetic clamps 11.

[0040] It is explained that the cutting mechanism 2 in the present invention is mainly composed of a mechanical arm and a cutting blade, which can cut the pouring spout at any position of the casting under the control of the cutting machine body 1 control system. Since the cutting machine body 1, the control system and the cutting mechanism 2 are all existing mature products, they will not be described in detail here.

[0041] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A machine for cutting excess material from pouring and riser of investment castings, comprising a cutting machine body (1), a cutting mechanism (2) being installed on the top of the inner side of the cutting machine body (1), characterized in that: A base (4) is fixedly connected to one side of the cutting machine body (1), and loading and unloading slots are provided at both ends of the cutting machine body (1) close to the base (4), and the two loading and unloading slots are respectively located on both sides of the base (4), and a plurality of protective curtains (3) are fixedly connected to the top of the loading and unloading slots. A waste collection bin (5) is fixedly connected to one end of the cutting machine body (1), and a motor (6) is fixedly connected to the inside of the base (4), and a rotating disk (7) is fixedly connected to the output end of the motor (6), and the outer wall of the rotating disk (7) is connected to three connecting rods (10) distributed at equal angles, and the inner wall of the connecting rod (10) is connected to the outer wall of the connecting rod (10). A battery (12) is fixedly connected to the top of the connecting rod (10) at one end away from the turntable (7) and an electro-permanent magnetic fixture (11) is fixedly connected, and a button switch (13) is fixedly connected to the bottom of the connecting rod (10) at one end away from the turntable (7), the battery (12) and the button switch (13) are electrically connected, and the button switch (13) and the electro-permanent magnetic fixture (11) are electrically connected, a turning assembly is provided at one end of the connecting rod (10) close to the turntable (7), a limit assembly matching the connecting rod (10) is provided inside the turntable (7), and a cleaning assembly is connected to one side of the outer wall of the base (4); The limiting assembly comprises an anti-slip block (8), a limiting block (15), a limiting column (16), an outward push elastic member (17) and a guide block (18); the upper end and the lower end of the anti-slip block (8) away from the connecting rod (10) are both provided with limiting grooves (14) matching the limiting block (15); the limiting block (15) is slidably connected to the turntable (7); the end of the limiting block (15) away from the connecting rod (10) is slidably connected to the limiting column (16) fixedly connected to the turntable (7); the outward push elastic member (17) is sleeved on the end of the limiting column (16) away from the limiting block (15); the bottom of the guide block (18) is fixedly connected to the top of the base (4); the guide block (18) is arc-shaped, and the guide block (18) matches the lower end of the limiting block (15).

2. The investment casting riser excess material cutting machine according to claim 1, characterized in that: The flip assembly comprises a flip gear (9) and a flip rack plate (19); the flip gear (9) is fixedly connected to one end of the connecting rod (10) close to the turntable (7); the flip rack plate (19) is arranged in an arc shape; the flip rack plate (19) is fixedly connected to the top of the base (4); the flip rack plate (19) is meshed with the flip gear (9); and the flip rack plate (19) is located on both sides of the cleaning assembly.

3. The investment casting riser excess material cutting machine according to claim 1, characterized in that: The cleaning component comprises a cleaning frame (27), two lower pressing blocks (31) and a plurality of bottom cleaning brushes (32); the cleaning frame (27) is connected to the base (4); the two lower pressing blocks (31) are respectively connected to two ends of the cleaning frame (27); the bottom cleaning brushes (32) are located between the two lower pressing blocks (31); the bottom cleaning brushes (32) are evenly distributed; and the upper ends of the bottom cleaning brushes (32) are conical.

4. The investment casting riser excess material cutting machine according to claim 3, characterized in that: The outer wall of the rotating disk (7) is fixedly connected with three push plates (20) distributed at equal angles. The push plates (20) and the connecting rods (10) are staggered and distributed. A dust cleaning brush (21) is fixedly connected to one side of the push plates (20).

5. The investment casting riser excess material cutting machine according to claim 4, characterized in that: The top of the lower pressing block (31) is wavy, and the bottom of the lower pressing block (31) is fixedly connected to a T-shaped support column (34). The lower end of the support column (34) is externally sleeved with a sleeve (33), and the sleeve (33) is fixedly connected to a cleaning frame (27). The outer wall of the support column (34) is sleeved with an upper pull elastic member (35), and the upper end of the upper pull elastic member (35) is fixedly connected to the top of the sleeve (33), and the lower end of the upper pull elastic member (35) is fixedly connected to the support column (34).

6. The investment casting riser excess material cutting machine according to claim 3, characterized in that: Both sides of the cleaning frame (27) are provided with a slide groove (28), and a positioning column (29) is fixedly connected inside the slide groove (28). The end of the positioning column (29) away from the base (4) is sleeved with a slider (26) matching the slide groove (28), and the side of the slider (26) away from the cleaning frame (27) is fixedly connected to a connecting plate (25), and the other end of the connecting plate (25) is fixedly connected to the base (4). The end of the positioning column (29) close to the base (4) is sleeved with a reset elastic member (30), and the side of the base (4) close to the cleaning frame (27) is rotatably connected to a transmission gear (23), and the lower end of the outer wall of the turntable (7) is fixedly connected to a transmission tooth block (22) matching the transmission gear (23), and the bottom of the transmission gear (23) is fixedly connected to an extrusion block (24), and the extrusion block (24) is elliptical.

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