Efficient continuous full-automatic foot cutter

Abstract

The invention discloses an efficient continuous full-automatic pin cutting machine, and relates to the field of element pin cutting machining, the efficient continuous full-automatic pin cutting machine comprises a base, a feeding mechanism for conveying products is arranged above the base, a material receiving disc is arranged on the right side of the feeding mechanism, and an empty groove for placing the products is formed in the material receiving disc; a rotating mechanism is arranged below the material receiving disc and controls rotation of the material receiving disc, bearing plates are arranged on the inner side of the empty groove in pairs and provide support for products in the empty groove, and movement control mechanisms are arranged on the outer sides of the bearing plates. According to the efficient continuous full-automatic foot cutting machine, products to be processed can be continuously conveyed through the feeding mechanism, the products are automatically driven to a foot cutting station to be subjected to foot cutting treatment in cooperation with rotation of the material receiving disc after being conveyed to the material receiving disc, and after foot cutting is completed, the products are moved to the next station to be subjected to automatic discharging; automatic and continuous foot cutting can be achieved through rotation of the receiving disc and feeding of the feeding mechanism, and the foot cutting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of component pin cutting processing, in particular to a high-efficiency continuous full-automatic pin cutting machine. Background Art

[0002] When processing electronic component circuit boards, the components generally have relatively long pins left after being fixed. The pins of the product can be cut off by a pin cutting machine to facilitate the subsequent processing of the product.

[0003] Prior art 1 (application number CN202123306127.0, Chinese patent published on December 24, 2021) A cutting machine for circuit board processing, including a chassis, positioning edges are formed on both sides of the left and right sides of the chassis, and guide rails are formed on the inner sides of the positioning edges. A circuit board clamping bracket is arranged in the chassis, and slide grooves are formed on both sides of the left and right sides of the circuit board clamping bracket. The guide rails are slidably installed in the slide grooves in a one-to-one correspondence. A slot is formed on the lower side of the circuit board clamping bracket, and clamping slide grooves are formed on both sides of the slot. A clamping block is slidably installed in the clamping slide groove. A cylinder is fixedly installed on both ends of the upper side of the circuit board clamping bracket, and the telescopic rod of the cylinder drives the clamping block to move up and down. A wire cutter is arranged in the chassis, and the wire cutter includes a motor, an active roller, a driven roller and a wire-cut molybdenum wire. Two driven rollers are provided, and the motor drives the active roller to rotate, and the wire-cut molybdenum wire is wound between the active roller and the two driven rollers. The upper edge of the wire-cut molybdenum wire is arranged at the lower edge in the slot; Prior art 2 (application number CN202010172629.X, Chinese patent published on March 12, 2020) A turntable electronic component pin cutting machine, which uses a fixed cutter and a movable cutter arranged in a "V" shape, and a cutting point on one side close to the material receiving box is tightly fitted. The movable cutter is driven by a hydraulic device to rotate around the rotating shaft. The cutting stroke is long and multiple pins can be cut at one time. The distance between the fixed cutter and the movable cutter close to the discharge guide rail is larger than the diameter of the pin, so that the pin can enter between the fixed cutter and the movable cutter and rub along the fixed cutter, thereby reducing the shearing pressure and being cut under the push of the hydraulic device, thereby increasing the service life of the movable cutter. Since the diameter of the pin is very small, that is, the stroke of the hydraulic device to push the movable cutter is short, the time required is very short, thereby improving the cutting efficiency.

[0004] Although the current pin cutting machine can cut the excess pins under the circuit board, it is necessary to manually place the products during cutting, remove the products after cutting, and then re-place the next group of products for cutting. The whole operation is relatively cumbersome, the processing efficiency is low, and the degree of automation and continuity of the device are poor. Summary of the invention

[0005] The purpose of the present invention is to provide a high-efficiency, continuous and fully automatic foot cutting machine to solve the problem raised in the above background technology that the current foot cutting machine needs to manually place the products during cutting, remove the products after cutting, and then re-place the next group of products for cutting, which makes the whole operation rather cumbersome.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an efficient, continuous and fully automatic foot cutting machine, comprising a base, a feeding mechanism for conveying products is arranged above the base, and a receiving tray is arranged on the right side of the feeding mechanism, and an empty slot for placing products is opened inside the receiving tray, a rotating mechanism is arranged below the receiving tray to control the rotation of the receiving tray, supporting plates are arranged in pairs on the inner sides of the empty slots to provide support for the products in the empty slots, and a moving control mechanism is arranged on the outer sides of the supporting plates to control the movement of the supporting plates, a receiving mechanism is arranged below the rear side of the receiving tray to collect the products after foot cutting, a pin positioning plate is arranged below the front side of the receiving tray, and the interior of the pin positioning plate is designed as a through-hole structure, and a cutting mechanism is arranged below the pin positioning plate, and an auxiliary pressing mechanism is arranged above the supporting plate to limit the products placed on the supporting plate.

[0007] To further optimize the technical solution, the feeding mechanism includes a feeding rack, a conveyor belt and an auxiliary plate; The feeding rack is fixed on the top of the base, and the side view cross section of the feeding rack is designed to be a concave shape; The conveyor belt is arranged above the feeding rack, and the conveyor belt is symmetrically distributed front and back about the center of the feeding rack, and the height of the conveyor belt is higher than the height of the supporting plate; The auxiliary plate is arranged above the conveyor belt.

[0008] To further optimize the technical solution, the rotating mechanism includes a driving shaft and a motor, the driving shaft is fixed at the lower middle part of the receiving tray, and the motor is connected below the driving shaft, and the motor is installed above the base.

[0009] To further optimize the technical solution, the movement control mechanism includes a first spring, a magnetic block, a connecting groove and an attraction mechanism; A first spring, arranged on the outer side of the supporting plate to provide thrust for the supporting plate; A magnetic block is fixed inside the supporting plate; The connecting groove is provided below the receiving tray, and the connecting groove and the magnetic block are arranged opposite to each other; The suction mechanism is arranged on the outside of the receiving mechanism to control the contraction of the supporting plate.

[0010] To further optimize the technical solution, the attraction mechanism includes a movable plate, an attraction block and a first retractor; A movable plate is arranged on the outside of the receiving mechanism, and the movable plate is located below the connecting groove; An attraction block is fixed above the movable plate; The first telescopic device is fixed below the movable plate to control the movement of the movable plate.

[0011] To further optimize the technical solution, an auxiliary positioning mechanism is provided on the front side of the receiving tray to position the product in the empty slot.

[0012] To further optimize the technical solution, the auxiliary positioning mechanism includes a limit plate, a second spring and a support plate; The limiting plate is arranged at the front side of the receiving tray, and the limiting plate is designed in an arc-shaped structure; A second spring is fixed to the front side of the limit plate to provide thrust for the limit plate; A support plate is fixed on the front side of the second spring to provide support therefor.

[0013] Further optimizing the technical solution, the cutting mechanism includes a wire cutter, a second retractor, a mounting seat, a third retractor and a collection box; A wire cutter is arranged below the pin positioning plate; A second telescopic device is arranged at the front side of the wire cutter to control the horizontal movement of the wire cutter; A mounting seat, fixed below the pin positioning plate; A third retractor is arranged below the mounting seat to control the movement of the mounting seat; The collection box is arranged below the pin positioning plate, and the collection box and the mounting seat are detachably connected.

[0014] To further optimize the technical solution, the auxiliary pressing mechanism includes a pressing plate, a rotating shaft, a torsion spring and a trigger mechanism; A pressure plate, arranged above the supporting plate; The rotating shaft is fixed on the inner side of the pressing plate, and a rotating connection is formed between the rotating shaft and the receiving tray; A torsion spring is installed at the end of the rotating shaft to provide a rotational restoring force therefor; The trigger mechanism is arranged on the outer side of the rotating shaft to control the rotation of the rotating shaft.

[0015] To further optimize the technical solution, the trigger mechanism includes a gear, a drive plate, a push rod, a movable rod and a third spring; Gears, fixed on the surface of the rotating shaft and rotating synchronously with the rotating shaft; A driving plate is arranged on the outer side of the gear and is meshed with the gear to form a meshing connection, and an up-and-down sliding structure is formed between the driving plate and the receiving tray; A push rod is arranged below the driving plate and connected to the collecting box; A movable rod is arranged above the top rod and between the top rods to form a nested connection; The third spring is fixed above the top rod to provide an upward thrust for the movable rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The feeding mechanism can continuously convey the products to be processed. After the products are conveyed to the receiving tray, the receiving tray automatically drives the products to the cutting station for cutting. After the cutting is completed, it moves to the next station for automatic unloading. The rotation of the receiving tray and the feeding of the feeding mechanism can realize the automatic and continuous cutting, thereby improving the cutting efficiency.

[0017] The support plate is used to support the product so that it is located inside the empty slot. The product can then fall by controlling the movement of the support plate to release its support for the product, thereby achieving automatic unloading of the product after foot cutting.

[0018] The pin positioning plate can be used to allow the pins with excess length to pass through the pin positioning plate, and the pins can be cut in cooperation with the cutting mechanism, which can also prevent the pins from bending during cutting and affecting the cutting effect.

[0019] The limiting plate can provide an extrusion positioning effect for the product, so that it can maintain good stability in the empty slot, while keeping the product placement consistent. Later, when the receiving tray rotates, the limiting plate can be squeezed to automatically release the positioning of the product.

[0020] The pressure plate can provide downward pressure on the product on the support plate, thereby providing vertical positioning for the product, and the movement of the pressure plate can be controlled by the movement of the collection box. When the pin positioning plate is raised, the product is automatically squeezed and limited, so that the product remains stable during subsequent pin cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top view structure of the present invention; Figure 3 It is a schematic diagram of the side structure of the feeding rack of the present invention; Figure 4 This is a schematic diagram of the structure of the material receiving tray of the present invention when viewed from above; Figure 5 It is a schematic diagram of the side structure of the receiving tray of the present invention; Figure 6 It is a schematic diagram of the top-sectional structure of the support plate of the present invention; Figure 7 It is a schematic diagram of the top-sectional structure of the pressing plate of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at a in the middle; Fig. 9 It is a schematic diagram of the side section structure of the support plate of the present invention; Fig.10 This is a bottom view of the structure of the drive shaft of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the receiving mechanism of the present invention; Fig.12 This is a schematic diagram of the three-dimensional structure of the pin positioning plate of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the collecting box of the present invention.

[0022] In the figure: 1. base; 2. feed rack; 3. conveyor belt; 4. auxiliary plate; 5. receiving tray; 501. drive shaft; 502. motor; 6. empty slot; 7. support plate; 8. first spring; 9. magnetic block; 10. connecting slot; 11. movable plate; 12. attraction block; 13. first telescope; 14. receiving mechanism; 15. pressure plate; 16. rotating shaft; 17. torsion spring; 18. gear; 19. drive plate; 20. limit plate; 21. second spring; 22. support plate; 23. pin positioning plate; 24. wire cutter; 25. second telescope; 26. mounting seat; 27. third telescope; 28. collecting box; 29. ​​ejector rod; 30. movable rod; 31. third spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 13 , the present invention provides the following technical solutions: an efficient continuous fully automatic foot cutting machine, comprising a base 1; Embodiment 1: The present invention provides the following technical solution, which discloses that a feeding mechanism for conveying products is arranged above the base 1, and a receiving tray 5 is arranged on the right side of the feeding mechanism, and an empty slot 6 for placing products is opened inside the receiving tray 5, and a rotating mechanism is arranged below the receiving tray 5 to control the rotation of the receiving tray 5, and supporting plates 7 are arranged in pairs on the inner side of the empty slot 6 to provide support for the products in the empty slot 6, and a moving control mechanism is arranged on the outer side of the supporting plate 7 to control the movement of the supporting plate 7, and a receiving mechanism 14 is arranged at the lower rear side of the receiving tray 5 to collect the products after cutting, and a pin positioning plate 23 is arranged at the lower front side of the receiving tray 5, and the inner side of the pin positioning plate 23 is designed as a through-hole structure, and the pin positioning mechanism 14 is arranged at the lower rear side of the receiving tray 5 to collect the products after cutting, and the ... A cutting mechanism is provided below the plate 23, and an auxiliary pressing mechanism is provided above the supporting plate 7 to limit the products placed on the supporting plate 7. The feeding mechanism includes a feeding rack 2, a conveyor belt 3 and an auxiliary plate 4. The feeding rack 2 is fixed above the base 1, and the side cross-section of the feeding rack 2 is designed in a concave shape. The conveyor belt 3 is provided above the feeding rack 2, and the conveyor belt 3 is symmetrically distributed front and back about the center of the feeding rack 2. The height of the conveyor belt 3 is higher than the height of the supporting plate 7. The auxiliary plate 4 is provided above the conveyor belt 3. The rotating mechanism includes a driving shaft 501 and a motor 502. The driving shaft 501 is fixed at the middle and lower part of the receiving tray 5, and the motor 502 is connected below the driving shaft 501, and the motor 502 is installed above the base 1.

[0025] The circuit board to be processed can be placed on the conveyor belt 3 for transportation with its pins facing downward. After the product is conveyed to the empty slot 6, it is supported by the supporting plate 7, and then the receiving tray 5 is controlled to rotate so that it drives the product to move and moves the product to the bottom of the pin positioning plate 23. At the same time, the next group of empty slots 6 continue to receive the next group of products, and the pin positioning plate 23 is controlled to move upward to allow the pins to pass through. The pins are then cut by the cutting mechanism. After the cutting is completed, the pin positioning plate 23 is lowered, and the receiving tray 5 continues to rotate to drive the product to the top of the receiving mechanism 14. Then the supporting plate 7 is controlled to move to release the support for the product, and the product falls onto the receiving mechanism 14 to complete the collection. The receiving tray 5 continues to rotate to realize the continuous automatic operation of cutting the pins.

[0026] Embodiment 2: Based on embodiment 1, a mobile control mechanism is disclosed, including a first spring 8, a magnetic block 9, a connecting groove 10 and an attraction mechanism. The first spring 8 is arranged on the outer side of the supporting plate 7 to provide thrust for the supporting plate 7. The magnetic block 9 is fixed inside the supporting plate 7. The connecting groove 10 is opened below the receiving plate 5, and the connecting groove 10 and the magnetic block 9 are arranged relatively. The attraction mechanism is arranged on the outer side of the receiving mechanism 14 to control the contraction of the supporting plate 7. The attraction mechanism includes a movable plate 11, an attraction block 12 and a first telescope 13. The movable plate 11 is arranged on the outer side of the receiving mechanism 14, and the movable plate 11 Located below the connecting groove 10, the attraction block 12 is fixed above the movable plate 11, the first telescope 13 is fixed below the movable plate 11 to control the movement of the movable plate 11, and an auxiliary positioning mechanism is provided on the front side of the receiving plate 5 to position the product in the empty groove 6. The auxiliary positioning mechanism includes a limit plate 20, a second spring 21 and a support plate 22. The limit plate 20 is provided on the front side of the receiving plate 5, and the limit plate 20 is designed with an arc-shaped structure. The second spring 21 is fixed on the front side of the limit plate 20 to provide thrust for the limit plate 20, and the support plate 22 is fixed on the front side of the second spring 21 to provide support for it.

[0027] The limiting plate 20 can provide extrusion limiting for the product, so that its position in the empty slot 6 remains stable. When the product after foot cutting moves to the top of the receiving mechanism 14, the first telescopic device 13 can be used to control the movement of the movable plate 11. The movable plate 11 drives the attraction block 12 to be inserted into the connecting slot 10. The attraction block 12 is opposite to the magnetic block 9, and the attraction magnetic block 9 drives the supporting plate 7 to move, so that the supporting plate 7 releases its support for the product, and the product falls automatically.

[0028] Embodiment 3: On the basis of embodiment 1, a cutting mechanism is disclosed, including a wire cutter 24, a second telescope 25, a mounting seat 26, a third telescope 27 and a collection box 28. The wire cutter 24 is arranged below the pin positioning plate 23. The second telescope 25 is arranged on the front side of the wire cutter 24 to control the horizontal movement of the wire cutter 24. The mounting seat 26 is fixed below the pin positioning plate 23. The third telescope 27 is arranged below the mounting seat 26 to control the movement of the mounting seat 26. The collection box 28 is arranged below the pin positioning plate 23, and the collection box 28 and the mounting seat 26 are detachably connected. The auxiliary pressing mechanism includes a pressing plate 15, a rotating shaft 16, a torsion spring 17 and a trigger mechanism. The pressing plate 15 is arranged above the supporting plate 7. The rotating shaft 16 is fixed on the inner side of the pressing plate 15, and the rotating shaft 16 and A rotational connection is formed between the receiving trays 5, a torsion spring 17 is installed at the end of the rotating shaft 16 to provide it with a rotational reset force, a trigger mechanism is arranged on the outside of the rotating shaft 16 to control the rotation of the rotating shaft 16, the trigger mechanism includes a gear 18, a driving plate 19, a push rod 29, a movable rod 30 and a third spring 31, the gear 18 is fixed on the surface of the rotating shaft 16 and keeps synchronous rotation with the rotating shaft 16, the driving plate 19 is arranged on the outside of the gear 18 and between the gear 18 to form a meshing connection, and an up and down sliding structure is formed between the driving plate 19 and the receiving tray 5, the push rod 29 is arranged below the driving plate 19, and the push rod 29 is connected to the collecting box 28, the movable rod 30 is arranged above the push rod 29 and between the push rod 29 to form a nested connection, and the third spring 31 is fixed above the push rod 29 to provide an upward thrust for the movable rod 30.

[0029] When cutting the pins, the wire cutter 24 is controlled to move through the second telescopic device 25 to cut the pins, and the cut pins fall into the collection box 28. When the pin positioning plate 23 is controlled to move upward, the movable rod 30 will move upward and fit with the driving plate 19, pushing the driving plate 19 to move upward. The driving plate 19 drives the rotating shaft 16 to rotate through the engagement with the gear 18. The rotating shaft 16 will drive the pressing plate 15 to rotate, so that the pressing plate 15 squeezes the product on the supporting plate 7 and limits it vertically, thereby improving the stability during subsequent cutting of the pins.

[0030] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly efficient, continuous and fully automatic foot cutting machine, comprising a base (1); Features: A feeding mechanism for conveying products is arranged above the base (1), and a receiving tray (5) is arranged on the right side of the feeding mechanism, and an empty slot (6) for placing products is opened inside the receiving tray (5), and a rotating mechanism is arranged below the receiving tray (5) to control the rotation of the receiving tray (5), and supporting plates (7) are arranged in pairs on the inner side of the empty slot (6) to provide support for the products in the empty slot (6), and a movement control mechanism is arranged on the outer side of the supporting plate (7) to control the movement of the supporting plate (7), and a receiving mechanism (14) is arranged below the rear side of the receiving tray (5) to collect the products after cutting, and a pin positioning plate (23) is arranged below the front side of the receiving tray (5), and the interior of the pin positioning plate (23) is designed as a through-hole structure, and a cutting mechanism is arranged below the pin positioning plate (23), and an auxiliary pressing mechanism is arranged above the supporting plate (7) to limit the products placed on the supporting plate (7).

2. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 1, characterized in that: The feeding mechanism comprises a feeding frame (2), a conveyor belt (3) and an auxiliary plate (4); The feeding rack (2) is fixed above the base (1), and the side view cross section of the feeding rack (2) is designed to be in the shape of a concave letter; A conveyor belt (3) is arranged above the feeding rack (2), and the conveyor belt (3) is symmetrically distributed front and back about the center of the feeding rack (2), and the height of the conveyor belt (3) is higher than the height of the supporting plate (7); The auxiliary plate (4) is arranged above the conveyor belt (3).

3. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 1 is characterized in that: The rotating mechanism comprises a driving shaft (501) and a motor (502); the driving shaft (501) is fixed at the middle and lower part of the receiving tray (5); the motor (502) is connected below the driving shaft (501); and the motor (502) is installed above the base (1).

4. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 1 is characterized in that: The movement control mechanism comprises a first spring (8), a magnetic block (9), a connecting groove (10) and an attraction mechanism; A first spring (8) is arranged on the outer side of the supporting plate (7) to provide thrust for the supporting plate (7); A magnetic block (9) fixed inside the supporting plate (7); The connecting groove (10) is provided below the receiving plate (5), and the connecting groove (10) and the magnetic block (9) are arranged opposite to each other; The suction mechanism is arranged on the outside of the receiving mechanism (14) to control the contraction of the supporting plate (7).

5. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 4, characterized in that: The suction mechanism comprises a movable plate (11), a suction block (12) and a first retractor (13); A movable plate (11) is arranged outside the receiving mechanism (14), and the movable plate (11) is located below the connecting groove (10); An attraction block (12) is fixed above the movable plate (11); The first retractor (13) is fixed below the movable plate (11) to control the movement of the movable plate (11).

6. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 1, characterized in that: An auxiliary positioning mechanism is provided on the front side of the receiving tray (5) to position the product in the empty slot (6).

7. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 6, characterized in that: The auxiliary positioning mechanism comprises a limit plate (20), a second spring (21) and a support plate (22); A limit plate (20) is arranged on the front side of the receiving plate (5), and the limit plate (20) is designed to be an arc-shaped structure; A second spring (21) is fixed to the front side of the limiting plate (20) to provide a thrust for the limiting plate (20); A support plate (22) is fixed on the front side of the second spring (21) to provide support therefor.

8. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 1, characterized in that: The cutting mechanism comprises a wire cutter (24), a second retractor (25), a mounting seat (26), a third retractor (27) and a collection box (28); A wire cutter (24) is arranged below the pin positioning plate (23); A second telescopic device (25) is arranged on the front side of the wire cutter (24) to control the horizontal movement of the wire cutter (24); A mounting seat (26) fixed below the pin positioning plate (23); A third retractor (27), arranged below the mounting seat (26) to control the movement of the mounting seat (26); The collection box (28) is arranged below the pin positioning plate (23), and the collection box (28) and the mounting seat (26) are detachably connected.

9. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 8, characterized in that: The auxiliary pressing mechanism comprises a pressing plate (15), a rotating shaft (16), a torsion spring (17) and a trigger mechanism; A pressing plate (15) is arranged above the supporting plate (7); A rotating shaft (16) is fixed on the inner side of the pressing plate (15), and a rotating connection is formed between the rotating shaft (16) and the receiving plate (5); A torsion spring (17) is mounted on the end of the rotating shaft (16) to provide a rotational restoring force thereto; The trigger mechanism is arranged outside the rotating shaft (16) to control the rotation of the rotating shaft (16).

10. The high-efficiency, continuous and fully automatic foot cutting machine according to claim 9, characterized in that: The trigger mechanism comprises a gear (18), a drive plate (19), a push rod (29), a movable rod (30) and a third spring (31); A gear (18) is fixed on the surface of the rotating shaft (16) and rotates synchronously with the rotating shaft (16); A driving plate (19) is arranged on the outer side of the gear (18) and is meshed with the gear (18), and an up-and-down sliding structure is formed between the driving plate (19) and the receiving plate (5); A push rod (29) is disposed below the driving plate (19), and the push rod (29) is connected to the collecting box (28); A movable rod (30) is arranged above the top rod (29) and is nested between the top rod (29); The third spring (31) is fixed above the top rod (29) to provide an upward thrust for the movable rod (30).

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