Processing device for lawn base cloth
By designing a lawn base cloth processing device including a Y-shaped push bucket, an L-shaped iron sheet and an electromagnet, the problem of aging accelerated caused by impurities in the plastic lawn base cloth is solved, and the effect of effectively removing impurities and extending service life is achieved.
Patent Information
- Application Number
- CN202510174967.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-04-11
AI Technical Summary
During the processing process of existing plastic lawn base cloth processing facilities, due to the inclusion of impurities such as iron oxide in the plastic powder, the aging of the modular plastic lawn base cloth after processing accelerates, affecting its service life.
A processing device for lawn base cloth is designed, which includes a Y-shaped push bucket, an L-shaped iron sheet, an electromagnet and a pushing machine. Through the flip of the L-shaped iron sheet and the magnetic force of the electromagnet, impurities such as iron oxide in the plastic powder are adsorbed and removed.
It effectively extends the service life of the lawn base cloth, reduces the presence of impurities, and improves the quality of the processed material.
Smart Images

Figure CN119795422A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of plastic processing, in particular to a processing device for lawn base cloth. Background Art
[0002] Lawn backing plays multiple roles in lawn construction and maintenance. Modular plastic lawn backings are widely used due to their compact size and ease of transportation. These modular plastic lawn backings are typically manufactured using selective laser sintering (SLS) to form the plastic powder into a fixed shape.
[0003] However, in the process of processing modular plastic turf base cloths using existing processing facilities, due to factors such as equipment wear during production, the plastic powder used is mixed with impurities such as iron oxide. These impurities exist in the processed modular plastic turf base cloth, which will accelerate its aging and seriously affect its service life. Summary of the Invention
[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a lawn base cloth processing device.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a processing device for lawn base cloth, comprising a machine body, a servo slide is fixedly installed at the rear edge of the inner bottom surface of the machine body, a Y-shaped push bucket is installed on the slide of the servo slide, the lower end of the Y-shaped push bucket is in contact with the inner bottom surface of the machine body, the front end of the Y-shaped push bucket is elastically installed with a slide seat, the front end of the slide seat is installed with a wheel body, two slope guide frames are symmetrically fixedly installed at the front edge of the inner bottom surface of the machine body, the wheel body is in contact with one of the slope guide frames, the front end upper part of the Y-shaped push bucket is installed with a load shaft, one end of the load shaft is coaxially inlaid with a gear, a gear is meshed with a tooth plate, the tooth plate is connected to the slide seat, the middle part of the load shaft is inlaid with a flip frame, the end of the flip frame is inlaid with an L-shaped iron sheet, the L-shaped iron sheet is located inside the Y-shaped push bucket, and an electromagnetic component is arranged inside the flip frame.
[0006] Preferably, a laser 3D printing component is installed in the middle of the internal top surface of the body, a lifting platform is installed through the middle of the internal bottom surface of the body, hoppers are embedded through both sides of the body, the upper end surface of the Y-shaped push hopper is coplanar with the lower end surface of the hopper, and a sealing plate is elastically installed at the lower end of the hopper.
[0007] Preferably, the middle part of the rear end of the Y-shaped push bucket is arranged in an arc shape, and the upper part of the rear end of the Y-shaped push bucket is inlaid with a connecting frame, the end of the connecting frame is fixed to the slide of the servo slide, and two protruding frames are symmetrically inlaid at the lower edges of the opposite surfaces of the two hoppers, and the end of the protruding frame is slidably installed with a column, and one end of the column is fixed to the sealing plate.
[0008] Preferably, a return spring is wound around the outside of the column, one end of the return spring is fixed to the closing plate, the other end of the return spring is fixed to the end of the extension frame, the other end of the column is inlaid with a limiting cap, and a plate frame is fixedly installed in the middle of the tooth plate, and the end of the plate frame is fixed to the slide seat.
[0009] Preferably, two rod seats are symmetrically extended from the front end of the Y-shaped push bucket, the load shaft is rotatably installed on the upper rod seat, a square rod is embedded between the opposite surfaces of the two rod seats, the slide is slidably installed on the outer surface of the square rod, a push spring is wound around the outer side of the square rod, the upper end of the push spring is fixed to the upper rod seat, the lower end of the push spring is fixed to the upper end of the slide, two receiving buckets are symmetrically fixedly installed at the front end of the machine body, and the push spring is in a tensioned state.
[0010] Preferably, the electromagnetic component includes an electromagnet fixedly installed inside the flip frame, the end of the L-shaped iron sheet is fixed to the electromagnet, a No. 1 wiring extends from the electromagnet, and a No. 2 wiring is fitted on the end of the No. 1 wiring, and the opposite ends of the No. 1 wiring and the No. 2 wiring are both inlaid with electrode sheets, and the two electrode sheets are tightly attached to each other.
[0011] Preferably, the No. 2 wiring is fixed to the upper rod seat, and a guide sleeve is fixedly installed on the front end of the upper rod seat, and a guide column is slidably installed inside the guide sleeve, and the lower end of the guide column is fixed to the No. 1 wiring, and a wire-moving claw extends from the side of the guide column, and a wire-moving wheel is installed at the other end of the carrier shaft.
[0012] Preferably, two ridges extend symmetrically on the outer surface of the guide column, and the ridges slide through the inner surface of the guide sleeve. The front end of the guide column is coaxially inlaid with a spring cap, and a gathering spring is wound around the outside of the guide column. One end of the gathering spring is fixed to the rear end of the spring cap, and the other end of the gathering spring is fixed to the front end of the guide sleeve.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. When the Y-shaped push bucket receives the plastic powder in the hopper and moves to spread the plastic powder on the lifting platform, the wheel body will gradually roll down along the slope guide frame under the pressure of the push spring, thereby driving the tooth plate to slowly move down to drive the gear to rotate, and then drive the L-shaped iron sheet on the carrier shaft to rotate, so that the L-shaped iron sheet gradually flips and moves upward to move from the lower part of the plastic powder accumulated in the Y-shaped push bucket to the upper part. In this process, the electromagnet is energized to generate magnetic force and transmit it to the L-shaped iron sheet, so that the L-shaped iron sheet generates magnetic force to adsorb and remove the iron oxide mixed in the plastic powder, thereby extending the life of the processed lawn base fabric.
[0015] 2. When the carrier shaft drives the L-shaped iron sheet to flip out of the Y-shaped push bucket and flip it to 180 degrees, the wire-pulling wheel just rotates 180 degrees and fits with the wire-pulling claw. Then the carrier shaft continues to drive the L-shaped iron sheet to flip, and the wire-pulling wheel dials the wire-pulling claw, thereby driving the No. 1 wiring to move. At this time, the guide column slides in the guide sleeve to guide the No. 1 wiring, so that the electrode sheet on the No. 1 wiring can be separated from the electrode sheet on the No. 2 wiring, so that the electromagnet is in a power-off state, and the L-shaped iron sheet loses its magnetic force, so that impurities such as iron oxide adsorbed on the L-shaped iron sheet can fall into the receiving bucket and be collected, thereby cleaning out the collected impurities by itself, without the need for workers to perform additional cleaning operations, which effectively facilitates use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural schematic diagram of a lawn base fabric processing device of the present invention;
[0017] Figure 2 This is a schematic diagram of another perspective of a processing device for lawn base fabric of the present invention;
[0018] Figure 3 A lawn base cloth processing device of the present invention Figure 2 A magnified view of middle A;
[0019] Figure 4 A lawn base cloth processing device of the present invention Figure 2 Enlarged view of middle B;
[0020] Figure 5 This is a schematic diagram of a push spring of a lawn base fabric processing device according to the present invention;
[0021] Figure 6 This is a schematic diagram of a carrying shaft of a lawn base fabric processing device of the present invention;
[0022] Figure 7 This is a separate view of the No. 1 connection and the No. 2 connection of a lawn base fabric processing device of the present invention;
[0023] Figure 8The figure shows an internal view of a Y-shaped push bucket of a lawn base fabric processing device according to the present invention.
[0024] In the figure: 1. Machine body; 2. Slope guide frame; 3. Receiving bucket; 4. Lifting platform; 5. Hopper; 6. Servo slide; 7. Connecting frame; 8. Laser 3D printing component; 9. Y-shaped push bucket; 10. No. 1 wiring; 11. Wire-pulling claw; 12. Guide column; 13. Electrode sheet; 14. Guide sleeve; 15. Gathering spring; 16. Spring cap; 17. No. 2 wiring; 18. Raised ridge; 19. Square rod; 20. Rod seat; 21. Push spring; 22. Wheel body; 23. Slide; 24. Carrying shaft; 25. Gear; 26. Tooth plate; 27. Plate frame; 28. Extending frame; 29. Limiting cap; 30. Column; 31. Reset spring; 32. Closing plate; 33. Turning frame; 34. Electromagnet; 35. Wire-pulling wheel; 36. L-shaped iron sheet. DETAILED DESCRIPTION
[0025] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.
[0026] like Figures 1-8The processing device of a lawn base cloth shown in the figure includes a machine body 1, a servo slide 6 is fixedly installed at the rear edge of the inner bottom surface of the machine body 1, and a Y-shaped push bucket 9 is installed on the slide of the servo slide 6. The servo slide 6 drives the Y-shaped push bucket 9 to move left and right, and the lower end of the Y-shaped push bucket 9 is in contact with the inner bottom surface of the machine body 1. The Y-shaped push bucket 9 plays the role of spreading the plastic powder on the lifting platform 4. The front end of the Y-shaped push bucket 9 is elastically installed with a slide 23, and the front end of the slide 23 is installed with a wheel body 22. Two slope guide frames 2 are symmetrically fixedly installed at the front edge of the inner bottom surface of the machine body 1, and the wheel body 22 is in contact with one of the slope guide frames 2. The cooperation between the wheel body 22 and the slope guide frame 2 drives the slide 23 to move. A load shaft 24 is installed on the upper front end of the Y-shaped push bucket 9, and a gear 25 is coaxially inlaid at one end of the load shaft 24. A tooth plate 26 is meshed on the gear 25. The seat 23 plays the role of driving the tooth plate 26 to move. The tooth plate 26 is connected to the slide seat 23. The middle part of the carrier shaft 24 is inlaid with a flip frame 33, and the end of the flip frame 33 is inlaid with an L-shaped iron piece 36. The flip frame 33 plays the role of connecting the L-shaped iron piece 36. The L-shaped iron piece 36 is located inside the Y-shaped push bucket 9. The cooperation of the gear 25 and the tooth plate 26 plays the role of driving the L-shaped iron piece 36 to flip. The interior of the flip frame 33 is provided with an electromagnetic component. The design of the Y-shaped push bucket 9 with a wide top and a narrow bottom can, on the one hand, facilitate the plastic powder in the hopper 5 to enter the Y-shaped push bucket 9 when adding materials. On the other hand, it can reduce the space, so that the plastic powder and the L-shaped iron piece 36 are in full contact, so that the L-shaped iron piece 36 can fully adsorb and remove impurities such as iron oxide in the plastic powder. The L-shaped design of the L-shaped iron piece 36 can ensure that it is fully in contact with the plastic powder in the Y-shaped push bucket 9 during flipping.
[0027] A laser 3D printing component 8 is installed in the middle of the internal top surface of the body 1, and a lifting platform 4 is installed through the middle of the internal bottom surface of the body 1. The cooperation of the laser 3D printing component 8 and the lifting platform 4 to selectively laser sinter the plastic powder to make it into a modular plastic lawn base cloth is an existing technology and has been widely used, so it is not elaborated here. A hopper 5 is embedded on both sides of the body 1, and the hopper 5 serves to store the plastic powder. The upper end surface of the Y-shaped push bucket 9 is coplanar with the lower end surface of the hopper 5, and the lower end of the hopper 5 is elastically installed with a sealing plate 32, which serves to seal the bottom of the hopper 5.
[0028] The middle part of the rear end of the Y-shaped push bucket 9 is arc-shaped, which can facilitate the flipping of the L-shaped iron sheet 36. The upper part of the rear end of the Y-shaped push bucket 9 is inlaid with a connecting frame 7. The end of the connecting frame 7 is fixed to the slide of the servo slide 6. The connecting frame 7 plays a role of connection and fixation. Two protruding frames 28 are symmetrically inlaid at the lower edges of the opposite surfaces of the two hoppers 5. The end of the protruding frame 28 is penetrated by a column 30 that is slidably installed. The cooperation of the protruding frame 28 and the column 30 plays a role in guiding the sealing plate 32. One end of the column 30 is fixed to the sealing plate 32.
[0029] A return spring 31 is wound around the outside of the column 30, and one end of the return spring 31 is fixed to the sealing plate 32. The return spring 31 serves to reset the sealing plate 32 after it moves. The other end of the return spring 31 is fixed to the end of the extension frame 28. The other end of the column 30 is inlaid with a limiting cap 29. The limiting cap 29 serves to position the reset position of the sealing plate 32. A plate frame 27 is fixedly installed in the middle of the tooth plate 26. The end of the plate frame 27 is fixed to the slide seat 23, and the plate frame 27 serves to connect and fix.
[0030] The front end of the Y-shaped push bucket 9 extends symmetrically with two rod seats 20, and the load shaft 24 is rotatably installed on the upper rod seat 20. A square rod 19 is inlaid between the opposite surfaces of the two rod seats 20, and the slide 23 is slidably installed on the outer surface of the square rod 19. The square rod 19 guides the slide 23. A push spring 21 is wrapped around the outside of the square rod 19. The upper end of the push spring 21 is fixed to the upper rod seat 20. The push spring 21 can push the slide 23 to move the slide 23 downward, and the lower end of the push spring 21 is fixed to the upper end of the slide 23. Two receiving buckets 3 are symmetrically fixedly installed at the front end of the body 1. The push spring 21 is in a tensioned state, and the receiving bucket 3 serves to receive the collected impurities such as iron oxide.
[0031] The electromagnetic component includes an electromagnet 34 fixedly mounted inside the flip frame 33, and the end of the L-shaped iron sheet 36 is fixed to the electromagnet 34. The electromagnet 34 can generate magnetic force when energized and transmit it to the L-shaped iron sheet 36, so that the L-shaped iron sheet 36 generates magnetic force to adsorb and remove iron oxide mixed in the plastic powder. A No. 1 wiring 10 extends from the electromagnet 34, and a No. 2 wiring 17 is fitted on the end of the No. 1 wiring 10. The No. 2 wiring 17 is connected to an external power supply. Electricity is introduced into the electromagnet 34 through the No. 2 wiring 17 and the No. 1 wiring 10 for power supply. The opposite ends of the No. 1 wiring 10 and the No. 2 wiring 17 are inlaid with electrode sheets 13. The two electrode sheets 13 are tightly attached to each other. The electrode sheet 13 can connect the No. 2 wiring 17 and the No. 1 wiring 10 together for power supply.
[0032] The No. 2 terminal 17 is fixed to the upper rod seat 20, and the front end of the upper rod seat 20 is fixedly installed with a guide sleeve 14, and a guide column 12 is slidably installed inside the guide sleeve 14. The guide sleeve 14 and the guide column 12 serve to guide the No. 1 terminal 10. The lower end of the guide column 12 is fixed to the No. 1 terminal 10, and a wire-moving claw 11 extends from the side of the guide column 12. A wire-moving wheel 35 is installed at the other end of the carrier shaft 24. The cooperation of the wire-moving wheel 35 and the wire-moving claw 11 can separate the electrode piece 13 on the No. 1 terminal 10 and the electrode piece 13 on the No. 2 terminal 17, so that the electromagnet 34 is in a power-off state.
[0033] Two ridges 18 extend symmetrically from the outer surface of the guide post 12, and the ridges 18 slide through the inner surface of the guide sleeve 14. The ridges 18 prevent the guide post 12 from rotating. The front end of the guide post 12 is coaxially inlaid with a spring cap 16, and the outside of the guide post 12 is wrapped with a gathering spring 15. The spring cap 16 is pushed by the gathering spring 15. One end of the gathering spring 15 is fixed to the rear end of the spring cap 16, and the other end of the gathering spring 15 is fixed to the front end of the guide sleeve 14. The gathering spring 15 makes the electrode sheet 13 on the No. 1 wiring 10 and the electrode sheet 13 on the No. 2 wiring 17 fit tightly together.
[0034] During processing, the servo slide 6 drives the Y-shaped push bucket 9 to move toward one of the hoppers 5. At this time, the wheel body 22 rolls along the slope guide frame 2 there to drive the tooth plate 26 to move up, and then drive the L-shaped iron sheet 36 to flip into the Y-shaped push bucket 9. At the same time, the Y-shaped push bucket 9 will push the sealing plate 32 during the movement, so that the sealing plate 32 moves sideways, allowing the lower part of the hopper 5 to be opened, so that the plastic powder in the hopper 5 can enter the Y-shaped push bucket 9, and then the Y-shaped push bucket 9 moves toward the lifting platform 4. At this time, the wheel body 22 will gradually roll down along the slope guide frame 2 under the pressure of the push spring 21, thereby driving the tooth plate 2 6 slowly moves downward to drive the gear 25 to rotate, thereby driving the L-shaped iron piece 36 on the carrier shaft 24 to rotate, causing the L-shaped iron piece 36 to gradually flip and move upward to move the plastic powder accumulated in the Y-shaped push bucket 9 from the lower part to the upper part. During this process, the electromagnet 34 is energized to generate magnetic force and transmit it to the L-shaped iron piece 36, causing the L-shaped iron piece 36 to generate magnetic force to adsorb and remove the iron oxide mixed in the plastic powder. When the L-shaped iron piece 36 flips out of the Y-shaped push bucket 9 and flips to 180 degrees, the wire pulling wheel 35 just rotates 180 degrees and fits with the wire pulling claw 11, and then the carrier shaft 24 continues to drive The L-shaped iron piece 36 flips over, and the wire wheel 35 moves the wire claw 11, thereby driving the No. 1 connection 10 to move. At this time, the guide column 12 slides in the guide sleeve 14 to guide the No. 1 connection 10, so that the electrode piece 13 on the No. 1 connection 10 can be separated from the electrode piece 13 on the No. 2 connection 17, so that the electromagnet 34 is in a power-off state, thereby making the L-shaped iron piece 36 lose its magnetic force, so that impurities such as iron oxide adsorbed on the L-shaped iron piece 36 can fall into the receiving bucket 3 and be collected. Then the Y-shaped push bucket 9 continues to move toward the lifting platform 4, so that the plastic powder in the Y-shaped push bucket 9 can fall onto the lifting platform 4 , and is scraped flat by the lower edge of the Y-shaped push bucket 9, so that the plastic powder in the Y-shaped push bucket 9 is spread on the lifting platform 4, and then the Y-shaped push bucket 9 moves toward another hopper 5 to repeat the above steps to load the plastic powder into the Y-shaped push bucket 9. At the same time, the laser 3D printing component 8 works to selectively laser sinter the plastic powder on the lifting platform 4. After sintering is completed, the lifting platform 4 moves down a certain distance, and then the Y-shaped push bucket 9 spreads the plastic powder on the lifting platform 4 again, and then the laser 3D printing component 8 works to continue selective laser sintering, and this cycle is repeated to process modular lawn base fabrics.
[0035] 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 merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A lawn base fabric processing device, comprising a body (1), characterized in that: A servo slide (6) is fixedly mounted at the rear edge of the inner bottom surface of the machine body (1), a Y-shaped push bucket (9) is mounted on the slide of the servo slide (6), the lower end of the Y-shaped push bucket (9) is in contact with the inner bottom surface of the machine body (1), a slide seat (23) is elastically mounted at the front end of the Y-shaped push bucket (9), a wheel body (22) is mounted at the front end of the slide seat (23), two slope guide frames (2) are symmetrically fixedly mounted at the front edge of the inner bottom surface of the machine body (1), the wheel body (22) is in contact with one of the slope guide frames ( 2), a carrier shaft (24) is installed at the upper front end of the Y-shaped push bucket (9), a gear (25) is coaxially embedded at one end of the carrier shaft (24), a toothed plate (26) is meshed on the gear (25), the toothed plate (26) is connected to the slide seat (23), a flip frame (33) is embedded in the middle of the carrier shaft (24), an L-shaped iron sheet (36) is embedded at the end of the flip frame (33), the L-shaped iron sheet (36) is located inside the Y-shaped push bucket (9), and an electromagnetic component is arranged inside the flip frame (33).
2. The processing device for lawn base fabric according to claim 1, characterized in that: A laser 3D printing assembly (8) is installed in the middle of the internal top surface of the body (1), a lifting platform (4) is installed through the middle of the internal bottom surface of the body (1), and hoppers (5) are embedded through both sides of the body (1), the upper end surface of the Y-shaped push bucket (9) is coplanar with the lower end surface of the hopper (5), and a sealing plate (32) is elastically installed at the lower end of the hopper (5).
3. The processing device for lawn base fabric according to claim 2, characterized in that: The middle part of the rear end of the Y-shaped push bucket (9) is arranged in an arc shape, and a connecting frame (7) is embedded in the upper part of the rear end of the Y-shaped push bucket (9), and the end of the connecting frame (7) is fixed to the slide of the servo slide (6). Two extending frames (28) are symmetrically embedded at the lower edges of the opposite surfaces of the two hoppers (5), and a column (30) is slidably installed through the end of the extending frame (28), and one end of the column (30) is fixed to the sealing plate (32).
4. The processing device for lawn base fabric according to claim 3, characterized in that: A return spring (31) is wound around the outer side of the column (30), one end of the return spring (31) is fixed to the sealing plate (32), the other end of the return spring (31) is fixed to the end of the extension frame (28), the other end of the column (30) is inlaid with a limiting cap (29), and a plate frame (27) is fixedly installed in the middle of the tooth plate (26), and the end of the plate frame (27) is fixed to the slide seat (23).
5. The processing device for lawn base fabric according to claim 1, characterized in that: The front end of the Y-shaped push bucket (9) is symmetrically extended with two rod seats (20), the load shaft (24) is rotatably mounted on the upper rod seat (20), a square rod (19) is embedded between the opposite surfaces of the two rod seats (20), the slide seat (23) is slidably mounted on the outer surface of the square rod (19), a push spring (21) is wound around the outer side of the square rod (19), the upper end of the push spring (21) is fixed to the upper rod seat (20), the lower end of the push spring (21) is fixed to the upper end of the slide seat (23), and two receiving buckets (3) are symmetrically fixedly mounted at the front end of the machine body (1), and the push spring (21) is in a tensioned state.
6. The processing device for lawn base fabric according to claim 5, characterized in that: The electromagnetic component comprises an electromagnet (34) fixedly mounted inside the flip frame (33); the end of the L-shaped iron sheet (36) is fixed to the electromagnet (34); a No. 1 wiring (10) extends from the electromagnet (34); a No. 2 wiring (17) is fitted on the end of the No. 1 wiring (10); the opposite ends of the No. 1 wiring (10) and the No. 2 wiring (17) are both inlaid with electrode sheets (13); and the two electrode sheets (13) are closely attached to each other.
7. The processing device for lawn base fabric according to claim 6, characterized in that: The second wiring (17) is fixed to the upper rod seat (20), a guide sleeve (14) is fixedly installed at the front end of the upper rod seat (20), a guide column (12) is slidably installed inside the guide sleeve (14), the lower end of the guide column (12) is fixed to the first wiring (10), a wire-moving claw (11) extends from the side of the guide column (12), and a wire-moving wheel (35) is installed at the other end of the carrier shaft (24).
8. The lawn base fabric processing device according to claim 7, characterized in that: The outer surface of the guide column (12) has two ridges (18) extending symmetrically, and the ridges (18) slide through the inner surface of the guide sleeve (14). The front end of the guide column (12) is coaxially inlaid with a spring cap (16), and the outer side of the guide column (12) is wound with a gathering spring (15), one end of the gathering spring (15) is fixed to the rear end of the spring cap (16), and the other end of the gathering spring (15) is fixed to the front end of the guide sleeve (14).