Bamboo batten grinding equipment for summer sleeping mat processing

Abstract

The invention relates to the field of bamboo batten polishing, in particular to bamboo batten polishing equipment for summer sleeping mat processing, which comprises a shell assembly comprising a fixing frame and a first fixing frame fixedly mounted at the bottom of the fixing frame, a second fixing frame is fixedly mounted in the middle of the fixing frame, and the first fixing frame and the second fixing frame are parallel to each other; and a cross rod is fixedly mounted in the middle of the bottom end of the first fixing frame. The effect of automatically screening the bamboo canes is achieved, the problem of low manual screening efficiency is solved, the labor cost is saved, the operation difficulty is reduced, meanwhile, the effect of freely adjusting the standard length of the screened bamboo canes by adjusting the position on the threaded pipe is achieved, the practicability of the equipment is improved, and the practicability of the equipment is improved. And the effects of automatic feeding and polishing and automatic discharging after screening are achieved, the problems that manual polishing efficiency is low and polishing quality is low are solved, the working efficiency is improved, and meanwhile the problem that bamboo strips are scratched during polishing is avoided.

Description

Technical Field

[0001] The invention relates to the field of bamboo strip grinding, in particular to a bamboo strip grinding device used for processing a summer mat. Background Art

[0002] A cool mat is a commonly used bedding in summer, used to provide a comfortable sleeping environment in hot weather. It is usually made of cool and breathable materials. Some good cool mats are woven from bamboo strips, which have the characteristics of moderate density, perspiration and breathability, making it less likely for people to feel stuffy when sleeping in summer.

[0003] When bamboo strips are used as the main raw material for a cool mat, the bamboo joints must first be divided into multiple small bamboo strips. These bamboo strips must be screened before entering the next step of processing, and the bamboo strips that do not meet the length must be removed, and then the bamboo strips must be polished. In the prior art, the workload of manual screening and polishing is large and the efficiency is low, which not only has low production efficiency, but is also easily scratched by the bamboo strips during the process. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a bamboo strip grinding device for processing a summer mat.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a bamboo strip grinding device for processing a cool mat, comprising: a shell assembly, comprising a fixed frame, and a first fixed frame fixedly installed at the bottom of the fixed frame, a second fixed frame fixedly installed in the middle of the fixed frame, the first fixed frame and the second fixed frame are parallel to each other, and a cross bar is fixedly installed in the middle of the bottom end of the first fixed frame; a screening assembly, comprising a support plate fixedly installed in the middle of the cross bar, the support plate is in an inclined state and a servo motor is fixedly installed at the bottom, and a first rotating rod is fixedly installed at the output end of the servo motor; and a grinding assembly, comprising a device shell, a feed port is provided on the left side of the device shell, and a second discharge port is provided on the right side of the device shell.

[0006] Preferably, a first connecting rod is fixedly installed on the front and rear sides of the top middle part of the fixed frame, a second connecting rod is fixedly installed on the front and rear sides of the right part of the second fixed frame, and adjacent ends of the two groups of the second connecting rods are fixedly connected to the device housing.

[0007] Preferably, a first notched gear is fixedly mounted on the bottom end of the first rotating rod, a second rotating rod is rotatably mounted on the left portion of the support plate, and a disc gear is fixedly mounted on the bottom end of the second rotating rod.

[0008] Preferably, the first notched gear is meshingly connected to the disc gear.

[0009] Preferably, a second cylinder is fixedly installed on the top of the second rotating rod, a second limiting plate is provided at the bottom of the second cylinder, the second limiting plate is fixedly connected to the first connecting rod, a cross plate is fixedly installed on the middle of the second rotating rod, the first cylinder is slidably installed on the middle of the second rotating rod, a first limiting plate is provided at the bottom of the first cylinder, a threaded tube is fixedly installed on the middle and lower part of the second rotating rod, and a threaded block is threadedly installed on the top of the threaded tube.

[0010] Preferably, multiple groups of limit blocks are fixedly installed around the first cylinder and the second cylinder, and bamboo strips are provided on adjacent sides of the multiple groups of limit blocks. A discharge hole is provided at the left bottom of the second limit plate, a limit ring is fixedly installed at the bottom end of the second limit plate, and a limit notch is provided on the right side of the limit ring. A waste outlet is provided on the front side of the first limit plate, and a first discharge port is provided on the right side of the first limit plate.

[0011] Preferably, a fixing seat is fixedly installed on the left middle part of the first limiting plate and the right middle part of the second fixing frame, sleeves are rotatably installed inside the two groups of fixing seats, and double-headed sliding rods are slidably installed inside the two groups of sleeves.

[0012] Preferably, a second notched gear is fixedly installed on the middle and lower part of the first rotating rod, a support rod is rotatably installed on the right side of the support plate, a first bevel gear is fixedly installed on the top of the support rod, a third rotating rod is rotatably installed on the middle and upper part of the first rotating rod, and a second bevel gear is fixedly installed on the bottom end of the third rotating rod.

[0013] Preferably, the second notched gear is meshedly connected to the first bevel gear, and the first bevel gear is meshedly connected to the second bevel gear.

[0014] Preferably, the top end of the third rotating rod passes through the device housing and is fixedly installed with a turntable, a plurality of sets of limit plates are fixedly installed around the top end of the turntable, a rotating column is fixedly installed on the top end of the first rotating rod, an O-shaped groove is provided on the outer wall of the rotating column, a ball is slidably installed inside the O-shaped groove, a polishing tube is provided inside the plurality of sets of limit plates, and the top end of the ball is rotatably connected to the polishing tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Start the servo motor, and the first cylinder and the second cylinder rotate intermittently through the meshing transmission between the disc gear and the notched gear. The bamboo strips will follow the second cylinder to rotate to the left side of the second limit plate. At this time, the bamboo strips will be affected by gravity and fall from the discharge hole to the first limit plate. As the first cylinder and the second cylinder continue to rotate, if bamboo strips shorter than the standard length are encountered, they will lose the limit when they rotate to the waste outlet on the front side of the first limit plate and fall from the first limit plate, while bamboo strips of normal standard length will be limited by the limit ring and continue to be transported. When bamboo strips longer than the standard length are encountered, the bamboo strips will be broken because the bottom of the bamboo strips is moving and the top is limited by the discharge hole. Finally, the qualified bamboo strips lose the limit at the upper and lower parts of the first discharge port at the same time and enter the device casing from the feed port. The effect of automatically screening bamboo strips is achieved, the problem of low efficiency of manual screening is solved, labor costs are saved, and the difficulty of operation is reduced. The threaded block is rotated to adjust its position on the threaded tube, and the position between the two limit plates is increased or decreased, so that the standard length of the screened bamboo strips can be freely adjusted, and the practicality of the equipment is increased. Since the O-shaped groove rotates with the rotating column, the ball drives the grinding tube to move up and down, and the third rotating rod drives the limit plate to rotate, and at the same time drives the bamboo strips to move toward the second discharge port during the grinding process, completing the working steps of grinding and transporting at the same time, and realizing the effect of automatic feeding and grinding and automatic material return after screening is completed, solving the problems of low efficiency and low grinding quality of manual grinding, improving work efficiency, and avoiding the problem of bamboo strips being scratched during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view structural schematic diagram of a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0018] Figure 2 A schematic side view of a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0019] Figure 3 A front view structural schematic diagram of a screening component and a polishing component in a bamboo strip polishing device for processing a summer mat according to an embodiment of the present invention;

[0020] Figure 4 A front view structural schematic diagram of a screening component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of a top view of a screening component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0022] Figure 6A schematic side view of the structure of a screening component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the disassembled structure of a screening component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the internal structure of a grinding component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention;

[0025] Fig. 9 A schematic diagram of the disassembled structure of a grinding component in a bamboo strip grinding device for processing a summer mat according to an embodiment of the present invention.

[0026] In the figure: 100, housing assembly; 101, fixed frame; 102, first fixed frame; 103, second fixed frame; 104, cross bar; 105, first connecting rod; 106, second connecting rod; 107, bamboo strip; 200, screening assembly; 201, support plate; 202, servo motor; 203, first rotating rod; 204, first notched gear; 205, second rotating rod; 206, disc gear; 207, threaded pipe; 208, thread block; 209, first limiting plate; 210, first cylinder; 211, second limiting plate; 212, second cylinder; 213, limiting block; 214, first cylinder; 215, first cylinder; 216, first cylinder; 217, first cylinder; 218, first cylinder; 219, first cylinder; 220, first cylinder; 221, first cylinder; 222, first cylinder; 223, first cylinder; 224, first cylinder; 225, first cylinder; 226, first cylinder; 227, first cylinder; 228, first cylinder; 229, first cylinder; 230, first cylinder; 231, first cylinder; 232, first cylinder; 233, first cylinder; 234, first cylinder; 235, first cylinder; 236, first cylinder; 237, first cylinder; 238, first cylinder; 239, first cylinder; 240, first cylinder; 241, first cylinder; 242, second cylinder; 243, first cylinder; 244, first cylinder; 245, first cylinder; 246, first cylinder; 247, first cylinder; 248, first cylinder; 249, first cylinder; 250, first cylinder; 251, first cylinder; 252, second cylinder; 253, first 4. Discharge hole; 215. Limiting ring; 216. Limiting notch; 217. Cross plate; 218. Waste outlet; 219. First discharge port; 220. Fixed seat; 221. Sleeve; 222. Double-headed slide rod; 300. Grinding assembly; 301. Second notch gear; 302. Support rod; 303. First bevel gear; 304. Third rotating rod; 305. Second bevel gear; 306. Device housing; 307. Feed port; 308. Second discharge port; 309. Turntable; 310. Limiting plate; 311. Rotating column; 312. O-shaped groove; 313. Ball; 314. Grinding tube. DETAILED DESCRIPTION

[0027] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0028] like Figure 1 - Fig. 9The bamboo strip polishing equipment shown in the figure for processing a summer mat includes a shell assembly 100, including a fixed frame 101, and a first fixed frame 102 fixedly installed at the bottom of the fixed frame 101, a second fixed frame 103 is fixedly installed in the middle of the fixed frame 101, the first fixed frame 102 and the second fixed frame 103 are parallel to each other, a cross bar 104 is fixedly installed in the middle of the bottom end of the first fixed frame 102, a first connecting rod 105 is fixedly installed on the front and rear sides of the middle of the top end of the fixed frame 101, a second connecting rod 106 is fixedly installed on the front and rear sides of the right part of the second fixed frame 103, and adjacent ends of the two groups of second connecting rods 106 are fixedly connected to the device shell 306.

[0029] The screening component 200 includes a support plate 201 fixedly installed in the middle of the cross bar 104. The support plate 201 is in an inclined state and a servo motor 202 is fixedly installed at the bottom. A first rotating rod 203 is fixedly installed at the output end of the servo motor 202. A first notched gear 204 is fixedly installed at the bottom end of the first rotating rod 203. A second rotating rod 205 is rotatably installed on the left part of the support plate 201. A disc gear 206 is fixedly installed at the bottom end of the second rotating rod 205. The first notched gear 204 is meshed with the disc gear 206. A second cylinder 212 is fixedly installed at the top of the second rotating rod 205. A second limiting plate 211 is provided at the bottom of the second cylinder 212. The second limiting plate 211 is fixedly connected to the first connecting rod 105. A cross plate 217 is fixedly installed in the middle of the rod 205, and a first cylinder 210 is slidably installed in the middle of the second rotating rod 205. The servo motor 202 is started, and its output end drives the first rotating rod 203 to rotate, and the first notched gear 204 on the first rotating rod 203 rotates together, and the disc gear 206 rotates through meshing transmission. The rotation of the disc gear 206 rotates the second rotating rod 205, and the rotation of the second rotating rod 205 causes the first cylinder 210 and the second cylinder 212 to rotate intermittently. A first limiting plate 209 is provided at the bottom of the first cylinder 210, and a threaded tube 207 is fixedly installed in the middle and lower part of the second rotating rod 205. A threaded block 208 is threadedly installed on the top of the threaded tube 207. The threaded block 208 is rotated to make it The position on the threaded tube 207 is adjusted, so that the positions of the first limiting plate 209 and the first cylinder 210 on the second rotating rod 205 are adjusted, and the position size between the second limiting plate 211 and the second cylinder 212 is increased or decreased, so as to achieve the effect of freely adjusting the standard length size of the screening bamboo strips 107, thereby increasing the practicality of the equipment. Multiple groups of limiting blocks 213 are fixedly installed around the first cylinder 210 and the second cylinder 212, and the bamboo strips 107 are arranged on the adjacent side of the multiple groups of limiting blocks 213. A discharge hole 214 is arranged at the left bottom of the second limiting plate 211, and the bamboo strips 107 are sequentially put in from the right side of the second limiting plate 211. The gap between the limiting blocks 213 on the second cylinder 212 is the same as the length of the bamboo strips 107. The bamboo strip 107 will follow the rotation of the second cylinder 212 and rotate to the left side of the second limiting plate 211. At this time, the bamboo strip 107 will be affected by gravity and fall from the discharge hole 214 to the first limiting plate 209. The bottom end of the second limiting plate 211 is fixedly installed with a limiting ring 215, and the right side of the limiting ring 215 is provided with a limiting notch 216. The front side of the first limiting plate 209 is provided with a waste outlet 218, and the right side of the first limiting plate 209 is provided with a first discharge port 219. As the first cylinder 210 and the second cylinder 212 continue to rotate, if a bamboo strip 107 shorter than the standard length is encountered, when it rotates to the waste outlet 218 on the front side of the first limiting plate 209, it will lose the limit and fall from the first limiting plate 209.The bamboo strips 107 of normal standard length will be limited by the limiting ring 215 and continue to be transported. When encountering bamboo strips 107 longer than the standard length, the bamboo strips 107 will be broken because the bottom of the bamboo strips 107 is moving and the top is limited by the discharge hole 214. The upper half of the broken bamboo strips 107 will fall directly, and the lower half will continue to fall from the waste outlet 218. Finally, the qualified bamboo strips 107 lose the limit at the upper and lower parts of the first discharge port 219 at the same time and enter the device housing 306 from the feed port 307, achieving the effect of automatically screening the bamboo strips 107, solving the problem of low efficiency of manual screening, saving labor costs, and reducing the difficulty of operation. The left middle part of the first limiting plate 209 and the right middle part of the second fixing frame 103 are fixedly installed with a fixed seat 220, and the interiors of the two sets of fixed seats 220 are rotatably installed with sleeves 221, and the interiors of the two sets of sleeves 221 are slidably installed with double-headed slide rods 222.

[0030] The grinding assembly 300 includes a device housing 306, a feed port 307 is provided on the left side of the device housing 306, a second discharge port 308 is provided on the right side of the device housing 306, a second notched gear 301 is fixedly installed on the middle and lower part of the first rotating rod 203, a support rod 302 is rotatably installed on the right side of the support plate 201, a first bevel gear 303 is fixedly installed on the top of the support rod 302, a third rotating rod 304 on the first rotating rod 203 is driven by the second notched gear 301, the first bevel gear 303 and the second bevel gear 305, a third rotating rod 304 is rotatably installed on the middle and upper part of the first rotating rod 203, a second bevel gear 305 is fixedly installed on the bottom end of the third rotating rod 304, the second notched gear 301 is meshed with the first bevel gear 303, the first bevel gear 303 is meshed with the second bevel gear 305, and the third rotating rod 304 is meshed with the first bevel gear 303. The top of the device penetrates the housing 306 and is fixedly installed with a turntable 309. A plurality of groups of limit plates 310 are fixedly installed around the top of the turntable 309. The third rotating rod 304 drives the turntable 309 to rotate, and the limit plates 310 on the turntable 309 rotate accordingly, thereby driving the bamboo strips 107 to move toward the second discharge port 308 during the grinding process. A rotating column 311 is fixedly installed on the top of the first rotating rod 203. The outer wall of the rotating column 311 is provided with an O-shaped groove 312. A ball 313 is slidably installed inside the O-shaped groove 312. A grinding tube 314 is provided inside the plurality of groups of limit plates 310. The top of the ball 313 is rotatably connected to the grinding tube 314. The rotation of the first rotating rod 203 drives the rotating column 311 to rotate, and the O-shaped groove 312 on its surface rotates accordingly, so that the ball 313 sliding in the O-shaped groove 312 drives the grinding tube 314 to move up and down.

[0031] The servo motor 202 is started, and its output end drives the first rotating rod 203 to rotate. The first notched gear 204 on the first rotating rod 203 rotates together. Through meshing transmission, the disc gear 206 rotates. The rotation of the disc gear 206 rotates the second rotating rod 205. The rotation of the second rotating rod 205 causes the first cylinder 210 and the second cylinder 212 to rotate intermittently. The bamboo strips 107 are sequentially put in from the right side of the second limiting plate 211. The gap between the limiting blocks 213 on the second cylinder 212 is consistent with the size of the bamboo strips 107. The bamboo strips 107 will follow the rotation of the second cylinder 212 and rotate to the left side of the second limiting plate 211. At this time, the bamboo strips 107 will fall from the discharge hole 214 under the influence of gravity. When the bamboo strips 107 are longer than the standard length, the bamboo strips 107 will be pulled apart because the bottom of the bamboo strips 107 is moving and the top of the bamboo strips 107 is limited by the discharge hole 214. The upper half of the bamboo strips 107 will drop directly, and the lower half will continue to drop from the waste outlet 218. Finally, the qualified bamboo strips 107 will be pulled apart from the first discharge hole 219. Part of the bamboo strips 107 lose their limit at the same time and enter the device housing 306 from the feed port 307, achieving the effect of automatically screening the bamboo strips 107, solving the problem of low efficiency of manual screening, saving labor costs, and reducing the difficulty of operation. The threaded block 208 is rotated to adjust its position on the threaded tube 207, so that the positions of the first limit plate 209 and the first cylinder 210 on the second rotating rod 205 are adjusted, increasing or decreasing the position size between the second limit plate 211 and the second cylinder 212, achieving the effect of freely adjusting the standard length size of the bamboo strips 107 for screening, and increasing the practicality of the equipment. Due to the rotation of the first rotating rod 203, the rotating column 311 is driven to rotate, and the O-shaped The groove 312 rotates accordingly, so that the ball 313 sliding in the O-shaped groove 312 drives the grinding tube 314 to move up and down. At the same time, the third rotating rod 304 on the first rotating rod 203 is driven by the second notched gear 301, the first bevel gear 303 and the second bevel gear 305. The third rotating rod 304 drives the turntable 309 to rotate, and the limiting plate 310 on the turntable 309 rotates accordingly, and at the same time drives the bamboo strips 107 to move toward the second discharge port 308 during the grinding process, completing the working steps of grinding and transporting at the same time, realizing the effect of automatic loading and grinding and automatic material return after screening is completed, solving the problems of low efficiency and low grinding quality of manual grinding, improving work efficiency, and avoiding the problem of scratching the bamboo strips during grinding.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A bamboo strip grinding device for summer mat processing, characterized in that: The invention comprises a housing component (100), comprising a fixed frame (101), and a first fixed frame (102) fixedly mounted at the bottom of the fixed frame (101), a second fixed frame (103) fixedly mounted in the middle of the fixed frame (101), the first fixed frame (102) and the second fixed frame (103) being parallel to each other, and a cross bar (104) fixedly mounted in the middle of the bottom end of the first fixed frame (102); a screening component (200), comprising a support plate (201) fixedly mounted in the middle of the cross bar (104), the support plate (201) being in an inclined state and a servo motor (202) fixedly mounted at the bottom, and a first rotating rod (203) fixedly mounted at the output end of the servo motor (202); and a grinding component (300), comprising a device housing (306), a material feed port (307) being arranged on the left side of the device housing (306), and a second material discharge port (308) being arranged on the right side of the device housing (306).

2. The bamboo strip grinding device for summer mat processing according to claim 1 is characterized in that: A first connecting rod (105) is fixedly installed on the front and rear sides of the middle of the top of the fixed frame (101), and a second connecting rod (106) is fixedly installed on the front and rear sides of the right part of the second fixed frame (103), and adjacent ends of the two groups of the second connecting rods (106) are fixedly connected to the device housing (306).

3. The bamboo strip grinding device for summer mat processing according to claim 2 is characterized in that: A first notched gear (204) is fixedly mounted on the bottom end of the first rotating rod (203), a second rotating rod (205) is rotatably mounted on the left portion of the support plate (201), and a disc gear (206) is fixedly mounted on the bottom end of the second rotating rod (205).

4. The bamboo strip grinding device for summer mat processing according to claim 3 is characterized in that: The first notched gear (204) is meshingly connected with the disc gear (206).

5. The bamboo strip grinding device for summer mat processing according to claim 4 is characterized in that: A second cylinder (212) is fixedly mounted on the top of the second rotating rod (205), a second limiting plate (211) is arranged at the bottom of the second cylinder (212), the second limiting plate (211) is fixedly connected to the first connecting rod (105), a cross plate (217) is fixedly mounted on the middle of the second rotating rod (205), a first cylinder (210) is slidably mounted on the middle of the second rotating rod (205), a first limiting plate (209) is arranged at the bottom of the first cylinder (210), a threaded tube (207) is fixedly mounted on the middle and lower part of the second rotating rod (205), and a threaded block (208) is threadedly mounted on the top of the threaded tube (207).

6. The bamboo strip grinding device for summer mat processing according to claim 5, characterized in that: A plurality of groups of limit blocks (213) are fixedly installed around the first cylinder (210) and the second cylinder (212), and a bamboo strip (107) is arranged on the adjacent side of the plurality of groups of limit blocks (213). A discharge hole (214) is arranged at the left bottom of the second limit plate (211), a limit ring (215) is fixedly installed at the bottom end of the second limit plate (211), and a limit notch (216) is arranged on the right side of the limit ring (215), a waste outlet (218) is arranged on the front side of the first limit plate (209), and a first discharge port (219) is arranged on the right side of the first limit plate (209).

7. The bamboo strip grinding device for summer mat processing according to claim 6, characterized in that: A fixing seat (220) is fixedly installed at the middle part of the left side of the first limiting plate (209) and the middle part of the right side of the second fixing frame (103), sleeves (221) are rotatably installed inside the two groups of fixing seats (220), and double-headed sliding rods (222) are slidably installed inside the two groups of sleeves (221).

8. The bamboo strip grinding device for summer mat processing according to claim 7, characterized in that: A second notched gear (301) is fixedly mounted on the middle and lower part of the first rotating rod (203); a supporting rod (302) is rotatably mounted on the right side of the supporting plate (201); a first bevel gear (303) is fixedly mounted on the top of the supporting rod (302); a third rotating rod (304) is rotatably mounted on the middle and upper part of the first rotating rod (203); a second bevel gear (305) is fixedly mounted on the bottom end of the third rotating rod (304).

9. The bamboo strip grinding device for summer mat processing according to claim 8, characterized in that: The second notched gear (301) is meshedly connected with the first bevel gear (303), and the first bevel gear (303) is meshedly connected with the second bevel gear (305).

10. The bamboo strip grinding device for summer mat processing according to claim 9, characterized in that: The top end of the third rotating rod (304) passes through the device housing (306) and is fixedly installed with a rotating disk (309). A plurality of groups of limiting plates (310) are fixedly installed around the top end of the rotating disk (309). A rotating column (311) is fixedly installed at the top end of the first rotating rod (203). An O-shaped groove (312) is provided on the outer wall of the rotating column (311). A round ball (313) is slidably installed inside the O-shaped groove (312). A grinding tube (314) is provided inside the plurality of groups of limiting plates (310). The top end of the round ball (313) is rotatably connected to the grinding tube (314).

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