A waste sorting and packaging equipment for clothing cutting production line

Abstract

The present invention discloses a waste sorting and packaging device for a clothing cutting production line, comprising an intermediate box, a material hopper fixedly connected to the center of the top surface of the intermediate box, and a bottom box fixedly connected to the bottom surface of the intermediate box, wherein a horizontal pull box is fixedly connected to the lower end of the left side of the intermediate box, and a first through-hole is opened at the center of the right side of the horizontal pull box, and the first through-hole passes through the left side of the intermediate box. The present invention, through the joint cooperation of the electromagnetic ball block, the connecting slot block, the convex block, etc., successfully realizes that the electromagnetic ball block conveys a large amount of waste downward while starting to absorb metal waste such as fine needles and knife heads contained in the waste, so that the device can easily separate the metal waste from the waste, improve the separation efficiency, avoid the staff from being injured by the metal waste hidden in the cloth waste, greatly ensure the safety of the operation of the device, and the operation is simple, flexible, and easy to promote.

Description

Technical Field

[0001] The invention relates to the technical field of dentistry, and in particular to a waste sorting and packaging device for a clothing cutting production line. Background Art

[0002] With the high-quality development of the economy, people's requirements for clothing and accessories are constantly increasing. The development of the clothing industry is becoming more and more rapid and diversified, with more emphasis on personalization. Among them, some companies specialize in providing centralized clothing cutting and processing services for small and medium-sized business owners in the clothing industry. These centralized clothing cutting and processing production companies have large business volumes and are often concentrated in a certain industrial park. Therefore, a large amount of waste will be generated in the cutting process, mainly including metal waste represented by cutting blades and needles, and fabric waste represented by cutting scraps.

[0003] The existing production line mainly relies on manual collection and processing to deal with this type of waste, which is not only inefficient but also poses certain safety hazards. Metal waste such as knife heads can easily cut hands, and operators often injure workers during the processing process. Fabric waste can be further divided into large pieces of fabric and scraps of fabric. Large pieces of fabric can be collected and reused for later decorative patterns or splicing designs, while scraps of fabric can only be treated as garbage. This will not only cause confusion in manual distinction and judgment, but also cause discomfort to the respiratory system of workers due to short threads, broken threads and scraps of fabric. Therefore, long-term manual operation poses a health hazard. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a waste sorting and packaging device for a clothing cutting production line.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A waste sorting and packaging device for a garment cutting production line comprises an intermediate box, a material hopper fixedly connected to the center of the top surface of the intermediate box, and a bottom box fixedly connected to the bottom surface of the intermediate box. A horizontal pull box is fixedly connected to the lower end of the left side of the intermediate box, a first through-hole is opened at the center of the right side of the horizontal pull box, and the first through-hole passes through the left side of the intermediate box. A machine box is fixedly connected to the lower end of the right side of the intermediate box, and a second through-hole is opened at the center of the left side of the machine box, and the second through-hole passes through the right side of the intermediate box.

[0007] A partition net is fixedly connected to the middle of the interior of the horizontal pull box, and the partition net divides the horizontal pull box into a left chamber and a right chamber, and the top surfaces of the left chamber and the right chamber are both provided with a first outlet;

[0008] The inner bottom surface of the chassis is fixedly connected with a motor, the output end of the motor is fixedly connected with a first rotating shaft, the first rotating shaft passes through the second through-hole, and the first rotating shaft is connected with a transmission blower mechanism;

[0009] The upper ends of the inner right side and the inner left side of the middle box are fixedly connected with a conveying cavity, and the conveying cavity is connected with a rolling collection mechanism.

[0010] Preferably, a bottom magnetic block is fixedly connected to the bottom surface of the bottom box, a first sliding opening is provided on the left side surface of the bottom box, a bottom drawer is slidably connected to the first sliding opening, and a leakage opening is provided on the inner bottom surface of the bottom drawer.

[0011] Preferably, the transmission air blowing mechanism includes a hollow cylindrical box body fixedly connected to the lower end of the inner right side surface of the intermediate box body near the edge of the second through-opening, the second through-opening is located in the hollow cylindrical box body, the first rotating shaft is sleeved with a fan blade at the end away from the motor, the first rotating shaft is sleeved with a first worm gear near the fan blade, the fan blade and the first worm gear are both located in the hollow cylindrical box body, the first worm gear is meshed with a main worm, the main worm passes through the upper part of the hollow cylindrical box body, the main worm is rotatably connected to the upper part of the hollow cylindrical box body, and the outer side surface of the hollow cylindrical box body away from the right side of the intermediate box body is fixedly connected with a baffle.

[0012] Preferably, the rolling collection mechanism includes a first fixed cavity fixedly connected to the left end of the inner bottom surface of the conveying cavity, a second fixed cavity fixedly connected to the right end of the inner bottom surface of the conveying cavity, the inner side surface of the upper part of the first fixed cavity is rotatably connected to the second rotating shaft, the second rotating shaft passes through the right side surface of the upper part of the first fixed cavity, the second rotating shaft is located inside the first fixed cavity and is sleeved with a first bearing shaft, the end of the second rotating shaft away from the first bearing shaft is sleeved with a second worm gear, the inner side surface of the upper part of the second fixed cavity is rotatably connected to a third rotating shaft, the third rotating shaft is located inside the second fixed cavity and is sleeved with a second bearing shaft, and the end of the third rotating shaft away from the second bearing shaft is sleeved with a third worm gear.

[0013] Preferably, the second worm gear and the third worm gear are both meshed with the main worm gear, the main worm gear passes through the bottom surface of the conveying cavity, and the main worm gear is rotatably connected to the bottom surface of the conveying cavity. The first fixed cavity and the second fixed cavity are both provided with a second removal outlet at the lower end of the side surface close to the side surface of the intermediate box body, and the second removal outlet is slidably connected to a storage pull box.

[0014] Preferably, a plurality of collecting chamber columns are fixedly connected at equal distances to the outer annular surface of the first bearing shaft, a sliding rod is fixedly connected to the inside of the collecting chamber column, a connecting groove block is fixedly connected to the middle section of the inner side surface of the collecting chamber column, the sliding rod is slidably connected to the electromagnetic ball block, the sliding rod is located between the electromagnetic ball block and the inner bottom surface of the collecting chamber column and is sleeved with a first spring, the outer side surface of the upper part of the collecting chamber column is fixedly connected to a T-shaped rod, the T-shaped rod is slidably connected to a pop-up soft shell, and the T-shaped rod is located between the outer side surface of the collecting chamber column and the pop-up soft shell and is sleeved with a second spring.

[0015] Preferably, a protrusion is fixedly connected to the side of the electromagnetic ball block close to the connecting slot block, and the protrusion is slidably connected to the connecting slot block.

[0016] Preferably, the height of the first fixed cavity is greater than that of the second fixed cavity, and the main worm is located between the first fixed cavity and the second fixed cavity.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The setting of the transmission blower mechanism, through the joint cooperation of the horizontal pull box, fan blades, main worm gear, etc., utilizes the meshing of the main worm gear and the first worm gear, successfully provides power for the normal operation of the rolling collection mechanism. At the same time, the horizontal pull box and the fan blades are located at the same horizontal position, and the small materials in the waste are successfully blown into the horizontal pull box, and then filtered again through the partition net to separate the small materials again, which is convenient for the staff to select, greatly improving the recycling rate of the waste.

[0019] 2. Through the joint cooperation of the electromagnetic ball block, the connecting groove block, the convex block, etc., and by utilizing whether the convex block is in contact with the connecting groove block to control whether the electromagnetic ball block is magnetic, the electromagnetic ball block successfully transports a large amount of waste downward while starting to absorb metal waste such as fine needles and knife heads contained in the waste, especially small metal waste. This allows the device to easily separate metal waste from the waste, improves the separation efficiency, and avoids injuries to workers due to metal waste hidden in fabric waste, greatly ensuring the safety of the operation of the equipment, and is simple and flexible to operate, making it easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a waste sorting and packaging device for a garment cutting production line proposed by the present invention;

[0021] Figure 2 A schematic diagram of a leak and a partition net in a waste sorting and packaging device for a garment cutting production line proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the connection between the first worm gear and the main worm in a waste sorting and packaging device for a garment cutting production line proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the connection between the first fixed cavity and the second fixed cavity and the conveying cavity in a waste sorting and packaging device for a garment cutting production line proposed by the present invention;

[0024] Figure 5 The present invention provides a schematic diagram of the connection between a first bearing shaft, a second bearing shaft and a first fixed cavity in a waste sorting and packaging device for a garment cutting production line proposed by the present invention.

[0025] Figure 6 for Figure 5 The enlarged schematic diagram of point A in the middle;

[0026] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle.

[0027] In the figure: 1, middle box; 101, material hopper; 102, chassis; 103, bottom box; 104, horizontal pull box; 105, bottom drawer; 106, partition net; 107, first through-hole; 108, motor; 109, storage pull box; 110, leakage; 111, conveying cavity; 2, first rotating shaft; 201, first worm gear; 202, main worm; 203, fan blade; 3, first fixed cavity; 301, second fixed cavity; 302, second rotating shaft; 303, third rotating shaft; 304, second bearing shaft; 305, third worm gear; 306, second worm gear; 307, first bearing shaft; 4, collecting cavity column; 401, connecting slot block; 402, sliding rod; 403, first spring; 404, electromagnetic ball block; 405, bump; 406, T-shaped rod; 407, pop-up soft shell. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference Figure 1 and Figure 2 As shown, a waste sorting and packaging device for a clothing cutting production line includes an intermediate box body 1, a material hopper 101 fixedly connected to the center of the top surface of the intermediate box body 1, and a bottom box 103 fixedly connected to the bottom surface of the intermediate box body 1. A horizontal pull box 104 is fixedly connected to the lower end of the left side of the intermediate box body 1. A first through-hole 107 is opened at the center of the right side of the horizontal pull box 104, and the first through-hole 107 passes through the left side of the intermediate box body 1. A machine box 102 is fixedly connected to the lower end of the right side of the intermediate box body 1, and a second through-hole is opened at the center of the left side of the machine box 102, and the second through-hole passes through the right side of the intermediate box body 1.

[0030] A partition net 106 is fixedly connected to the middle of the interior of the horizontal pull box 104, and the partition net 106 divides the horizontal pull box 104 into a left chamber and a right chamber. The top surfaces of the left chamber and the right chamber are both provided with a first outlet. A motor 108 is fixedly connected to the inner bottom surface of the chassis 102, and the output end of the motor 108 is fixedly connected to a first rotating shaft 2, and the first rotating shaft 2 passes through the second through-hole. The first rotating shaft 2 is connected to a transmission blower mechanism, and the upper ends of the inner right side and the inner left side of the middle box body 1 are fixedly connected to the conveying cavity 1 11. The conveying cavity 111 is connected to a rolling collection mechanism. It should be supplemented that a bottom magnetic block is fixedly connected to the bottom surface of the bottom box 103. It should be supplemented that the setting of the bottom magnetic block plays a double insurance role, which absorbs the missed metal waste, is conducive to maintaining the safety of the cloth waste, and is convenient for the staff to recycle and process. A first sliding opening is opened on the left side of the bottom box 103, and the first sliding opening is slidably connected to the bottom drawer 105. The inner bottom surface of the bottom drawer 105 is opened with a leakage opening 110.

[0031] Reference Figure 3 As shown, the transmission blower mechanism includes a hollow column box body fixedly connected to the lower end of the inner right side surface of the middle box body 1 near the edge of the second through-opening, the second through-opening is located in the hollow column box body, the end of the first rotating shaft 2 away from the motor 108 is sleeved with a fan blade 203, the first rotating shaft 2 is sleeved with a first worm gear 201 near the fan blade 203, the fan blade 203 and the first worm gear 201 are both located in the hollow column box body, the first worm gear 201 is meshed with a main worm 202, the main worm 202 passes through the upper part of the hollow column box body, the main worm 202 is rotatably connected to the upper part of the hollow column box body, and the outer side surface of the hollow column box body away from the right side of the middle box body 1 is fixedly connected with a retaining net.

[0032] The setting of the transmission blower mechanism, through the joint cooperation of the transverse pull box 104, the fan blades 203, the main worm 202, etc., utilizes the meshing of the main worm 202 and the first worm wheel 201, and successfully provides power for the normal operation of the rolling collection mechanism. At the same time, the transverse pull box 104 and the fan blades 203 are located at the same horizontal position, and the small materials in the waste are successfully blown into the transverse pull box 104, and then filtered again through the partition net 106 to separate the small materials again, which is convenient for the staff to select, thereby greatly improving the recycling rate of the waste.

[0033] Reference Figure 4 and Figure 5As shown, the rolling collection mechanism includes a first fixed cavity 3 fixedly connected to the left end of the inner bottom surface of the conveying cavity 111, a second fixed cavity 301 is fixedly connected to the right end of the inner bottom surface of the conveying cavity 111, the inner side surface of the upper part of the first fixed cavity 3 is rotatably connected to the second rotating shaft 302, the second rotating shaft 302 passes through the right side surface of the upper part of the first fixed cavity 3, the second rotating shaft 302 is located inside the first fixed cavity 3 and is sleeved with a first bearing shaft 307, the end of the second rotating shaft 302 away from the first bearing shaft 307 is sleeved with a second worm gear 306, the inner side surface of the upper part of the second fixed cavity 301 is rotatably connected to the third rotating shaft 303, the third rotating shaft 303 is located inside the second fixed cavity 301 and is sleeved with There is a second bearing shaft 304, and a third worm gear 305 is sleeved on one end of the third rotating shaft 303 away from the second bearing shaft 304, wherein the height of the first fixed cavity 3 is greater than that of the second fixed cavity 301, and the main worm gear 202 is located between the first fixed cavity 3 and the second fixed cavity 301. It should be supplemented that the second worm gear 306 and the third worm gear 305 are both engaged with the main worm gear 202, and the main worm gear 202 passes through the bottom surface of the conveying cavity 111, and the main worm gear 202 is rotatably connected to the bottom surface of the conveying cavity 111. The first fixed cavity 3 and the second fixed cavity 301 are both provided with a second removal outlet at the lower end of the side near the side of the intermediate box 1, and the second removal outlet is slidably connected to the storage pull box 109.

[0034] Reference Figure 6 and Figure 7 As shown, the outer annular surface of the first bearing shaft 307 is fixedly connected with a plurality of collecting chamber columns 4 at equal distances, the interior of the collecting chamber column 4 is fixedly connected with a sliding rod 402, the middle section of the inner side surface of the collecting chamber column 4 is fixedly connected with a connecting groove block 401, the sliding rod 402 is slidably connected with an electromagnetic ball block 404, the sliding rod 402 is located between the electromagnetic ball block 404 and the inner bottom surface of the collecting chamber column 4 and is sleeved with a first spring 403, the outer side surface of the upper part of the collecting chamber column 4 is fixedly connected with a T-shaped rod 406, the T-shaped rod 406 is slidably connected with a pop-up soft shell 407, the T-shaped rod 406 is located between the outer side surface of the collecting chamber column 4 and the pop-up soft shell 407 and is sleeved with a second spring, it should be supplemented that the electromagnetic ball block 404 is fixedly connected with a protrusion 405 on the side close to the connecting groove block 401, and the protrusion 405 is slidably connected to the connecting groove block 401.

[0035] The setting of the rolling collection mechanism, through the joint cooperation of the first bearing shaft 307, the second bearing shaft 304, the second rotating shaft 302, etc., utilizes the rotation of the first bearing shaft 307 and the second bearing shaft 304, and successfully realizes the orderly transportation of waste into the interior of the intermediate box 1 and avoids blockage, thereby greatly improving the waste transportation efficiency and thus improving the classification efficiency of the equipment.

[0036] Through the joint cooperation of the electromagnetic ball block 404, the connecting groove block 401, the protrusion 405, etc., and utilizing the contact between the protrusion 405 and the connecting groove block 401 to control whether the electromagnetic ball block 404 is magnetic, it is successfully achieved that while the electromagnetic ball block 404 transports a large amount of waste downward, it begins to absorb metal waste such as fine needles and knife heads contained in the waste, especially small metal waste, so that the device can easily separate the metal waste from the waste, thereby improving the separation efficiency and avoiding injuries to the staff due to the metal waste hidden in the cloth waste, thus greatly ensuring the safety of the operation of the device, and the operation is simple, flexible, and easy to promote.

[0037] In the present invention, the functional principle can be explained by the following operation mode:

[0038] When using the device, first place the device beside the clothing cutting production line to collect a large amount of waste materials on the production line and put them into the device from the material hopper 101, and then start the motor 108.

[0039] The start of the motor 108 will drive the first rotating shaft 2 to start rotating, so that the first worm gear 201 and the fan blade 203 start rotating. Since the first worm gear 201 is meshed with the main worm 202, the main worm 202 starts rotating. Since the main worm 202 is meshed with the third worm gear 305 and the second worm gear 306, the third worm gear 305 and the second worm gear 306 start rotating, and then the third rotating shaft 303 and the second rotating shaft 302 start rotating, and the second bearing shaft 304 and the first bearing shaft 307 start rotating. The rotation of the first bearing shaft 307 will cause the collection cavity column 4 fixedly connected to the outer annular surface of the first bearing shaft 307 to start rotating. At this time, when the collection cavity column 4 extends out of the side of the first fixed cavity 3, the gravity of the electromagnetic ball block 404, the centripetal force of the electromagnetic ball block 404, and the first spring 403 Under the action of the elastic force, the protrusion 405 contacts the connecting groove block 401, the power in the electromagnetic ball block 404 is turned on, the electromagnetic ball block 404 has magnetism, and the collecting cavity column 4 transports a large amount of waste downward while starting to absorb metal waste such as fine needles and knife heads contained in the material. At this time, the metal waste is squeezed and popped out of the soft shell 407, and the second spring begins to shrink. When the collecting cavity column 4 turns to the first fixed cavity 3, under the action of the gravity of the electromagnetic ball block 404, the centripetal force of the electromagnetic ball block 404, and the elastic force of the first spring 403, the protrusion 405 is disengaged from the connecting groove block 401, the power in the electromagnetic ball block 404 is cut off, and the electromagnetic ball block 404 is no longer magnetic. During the resetting process of the second spring, the absorbed metal waste is bounced into the first fixed cavity 3 and falls into the storage pull box 109.

[0040] The remaining materials continue to fall, and under the action of sufficient wind force generated by the rotation of the fan blades 203, small materials are separated from large materials, and the small materials enter the horizontal pull box 104, and the large materials fall into the bottom drawer 105. The small materials entering the horizontal pull box 104 can pass through the partition net 106 and continue to be separated, and the large materials falling into the bottom drawer 105 can be taken out by pulling the bottom drawer 105.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste sorting and packaging device for a garment cutting production line, comprising an intermediate box (1), a material hopper (101) fixedly connected to the center of the top surface of the intermediate box (1), and a bottom box (103) fixedly connected to the bottom surface of the intermediate box (1), characterized in that: The lower end of the left side of the intermediate box (1) is fixedly connected to a transverse box (104), and a first through-hole (107) is opened at the center of the right side of the transverse box (104), and the first through-hole (107) passes through the left side of the intermediate box (1). The lower end of the right side of the intermediate box (1) is fixedly connected to a chassis (102), and a second through-hole is opened at the center of the left side of the chassis (102), and the second through-hole passes through the right side of the intermediate box (1); A partition net (106) is fixedly connected to the middle of the interior of the horizontal pull box (104), and the partition net (106) divides the horizontal pull box (104) into a left chamber and a right chamber, and the top surfaces of the left chamber and the right chamber are both provided with a first take-out port; The inner bottom surface of the chassis (102) is fixedly connected to a motor (108), the output end of the motor (108) is fixedly connected to a first rotating shaft (2), the first rotating shaft (2) passes through the second through-hole, and the first rotating shaft (2) is connected to a transmission blower mechanism; The upper ends of the inner right side and the inner left side of the middle box (1) are both fixedly connected with a conveying cavity (111), and the conveying cavity (111) is connected with a rolling collection mechanism; The rolling collection mechanism comprises a first fixed cavity (3) fixedly connected to the left end of the inner bottom surface of the conveying cavity (111); a second fixed cavity (301) is fixedly connected to the right end of the inner bottom surface of the conveying cavity (111); a second rotating shaft (302) is rotatably connected to the inner side surface of the upper part of the first fixed cavity (3); the second rotating shaft (302) passes through the right side surface of the upper part of the first fixed cavity (3); the second rotating shaft (302) is located inside the first fixed cavity (3) and is sleeved therein. The second rotating shaft (302) is connected to a first bearing shaft (307); a second worm gear (306) is sleeved on one end of the second rotating shaft (302) away from the first bearing shaft (307); a third rotating shaft (303) is rotatably connected to the inner side surface of the upper part of the second fixed cavity (301); the third rotating shaft (303) is sleeved on a second bearing shaft (304) located inside the second fixed cavity (301); and a third worm gear (305) is sleeved on one end of the third rotating shaft (303) away from the second bearing shaft (304); The outer annular surface of the first bearing shaft (307) is fixedly connected to a plurality of collecting chamber columns (4) at equal distances, the interior of the collecting chamber column (4) is fixedly connected to a sliding rod (402), the middle section of the inner side surface of the collecting chamber column (4) is fixedly connected to a connecting groove block (401), the sliding rod (402) is slidably connected to an electromagnetic ball block (404), the sliding rod (402) is located between the electromagnetic ball block (404) and the inner bottom surface of the collecting chamber column (4) and is sleeved with a first spring (403), the outer side surface of the upper part of the collecting chamber column (4) is fixedly connected to a T-shaped rod (406), the T-shaped rod (406) is slidably connected to a pop-up soft shell (407), and the T-shaped rod (406) is located between the outer side surface of the collecting chamber column (4) and the pop-up soft shell (407) and is sleeved with a second spring; A protrusion (405) is fixedly connected to the side of the electromagnetic ball block (404) close to the connecting slot block (401), and the protrusion (405) is slidably connected to the connecting slot block (401).

2. The waste sorting and packaging equipment for a garment cutting production line according to claim 1 is characterized in that: The bottom surface of the bottom box (103) is fixedly connected to a bottom magnetic block, the left side of the bottom box (103) is provided with a first sliding opening, the first sliding opening is slidably connected to a bottom drawer (105), and the inner bottom surface of the bottom drawer (105) is provided with a leakage opening (110).

3. The waste sorting and packaging equipment for a garment cutting production line according to claim 1 is characterized in that: The transmission air blowing mechanism comprises a hollow column case fixedly connected to the lower end of the inner right side surface of the middle case (1) near the edge of the second through-opening, the second through-opening being located in the hollow column case, the end of the first rotating shaft (2) away from the motor (108) is sleeved with a fan blade (203), the first rotating shaft (2) near the fan blade (203) is sleeved with a first worm gear (201), the fan blade (203) and the first worm gear (201) are both located in the hollow column case, the first worm gear (201) is meshed with a main worm (202), the main worm (202) passes through the upper part of the hollow column case, the main worm (202) is rotatably connected to the upper part of the hollow column case, and the outer side surface of the hollow column case away from the right side surface of the middle case (1) is fixedly connected with a retaining net.

4. The waste sorting and packaging equipment for a garment cutting production line according to claim 1 is characterized in that: The second worm gear (306) and the third worm gear (305) are both meshed with the main worm gear (202), the main worm gear (202) passes through the bottom surface of the conveying cavity (111), and the main worm gear (202) is rotatably connected to the bottom surface of the conveying cavity (111), and the first fixed cavity (3) and the second fixed cavity (301) are both provided with a second removal outlet at the lower end of the side surface close to the middle box body (1), and the second removal outlet is slidably connected to a storage drawer box (109).

5. The waste sorting and packaging equipment for a garment cutting production line according to claim 1 is characterized in that: The height of the first fixed cavity (3) is greater than that of the second fixed cavity (301), and the main worm (202) is located between the first fixed cavity (3) and the second fixed cavity (301).

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