Screw feeding apparatus

Abstract

Disclosed is a screw feeding apparatus, comprising a base (1), large hopper support posts (2), a large hopper (3), a large hopper containment plate (4), a discharge mechanism (5), a small hopper (9), a two-stage lifting apparatus (8), a vibratory sorting and feeding mechanism (7), and a cutting mechanism (6). The large hopper containment plate (4) is arranged on an inner side of the large hopper (3), and the large hopper containment plate (4) is arranged around a discharge outlet of the large hopper (3); the discharge mechanism (5) is arranged at the discharge outlet of the large hopper (3); the small hopper (9) is arranged below the discharge mechanism (5), the small hopper (9) is fixedly disposed on an upper side of the base (1) by means of the two-stage lifting apparatus (8), a lifting portion at an upper end of the two-stage lifting apparatus (8) passes through the small hopper (9) and then extends above the small hopper (9), a feed inlet of the vibratory sorting and feeding mechanism (7) is aligned with a discharge end of the lifting portion of the two-stage lifting apparatus (8), and a discharge port of the vibratory sorting and feeding mechanism (7) is aligned with a feed inlet of the cutting mechanism (6). The screw feeding apparatus improves screw feeding continuity and stability, and ensures screw feeding efficiency.

Description

A nail feeding device Technical Field

[0001] This invention relates to a nail feeding device, belonging to the technical field of automatic screw driving equipment. Background Technology

[0002] Automatic screw-driving equipment mainly consists of a feeding system and a locking system. The feeding part, also known as a screw arranging machine or screw supply machine, is a relatively simple small-scale automated device that arranges screws in a row to improve work efficiency. It is widely used in the electronics industry.

[0003] Currently, vibratory feeding mechanisms, such as vibratory hoppers, are generally used to supply screws. However, vibratory feeding mechanisms are bulky and prone to jamming during the feeding process, which affects the continuous feeding and can damage the screw coating. How to improve the continuous stability of screw feeding and effectively protect the coating is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] This invention overcomes the shortcomings of the existing technology and provides a screw feeding device that greatly improves the continuous stability of screw feeding, ensures screw feeding efficiency, and effectively protects the coating.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a nail feeding device, including a base, a large hopper support seat and a large hopper, wherein the large hopper is fixed on the base by the large hopper support seat, the large hopper support seat has a plate-like structure, a plurality of large hopper support seats are arranged around the large hopper, the upper end of the large hopper support seat is fixedly connected to the outer side of the large hopper, and the lower end of the large hopper support seat is fixedly arranged on the upper side of the base;

[0006] The inner side of the large hopper is provided with a large hopper baffle plate. One side of the large hopper baffle plate is fixedly installed on the inner side wall of the large hopper, and the large hopper baffle plate is arranged around the discharge port of the large hopper and maintains a certain gap with the discharge port of the large hopper.

[0007] The large hopper is equipped with a discharge mechanism at its discharge port, which is used to open and close the discharge port of the large hopper.

[0008] A small hopper is provided below the feeding mechanism. The small hopper is fixedly mounted on the upper side of the base by a two-stage lifting device. The lower end of the two-stage lifting device is fixed on the base. The lifting part located at the upper end of the two-stage lifting device passes through the small hopper and extends above the small hopper. The lifting part of the two-stage lifting device is connected to the screening vibration feeding mechanism. The inlet of the screening vibration feeding mechanism is aligned with the outlet end of the lifting part of the two-stage lifting device. The outlet of the screening vibration feeding mechanism is aligned with the inlet of the cutting mechanism.

[0009] Furthermore, the structure of the feeding mechanism includes a feeding cylinder, a feeding plate, a supporting rib, a feeding support, and a feeding port. The upper end of the feeding support is fixedly installed on the outer side of the bottom of the large hopper, and the lower end of the feeding support is fixedly installed on the upper side of the base. The supporting rib is horizontally installed below the feeding port of the large hopper. One end of the supporting rib is fixedly installed on the feeding support, and the other end of the supporting rib is fixedly installed with a feeding cylinder. The cylinder body of the feeding cylinder is fixed on the supporting rib, and the feeding plate is fixedly installed on the piston rod of the feeding cylinder.

[0010] The upper end of the discharge port is movably mounted on the support rib plate. The position of the discharge port can be adjusted so that it is aligned with the discharge port of the large hopper, and the upper end of the discharge port is in close contact with the discharge port of the large hopper. The lower end of the discharge port is located below the support rib plate. The discharge port is provided with an insertion slot for the discharge plate to pass through. Under the drive of the discharge cylinder, the discharge plate can match and pass through the discharge port to block or open the discharge port of the large hopper.

[0011] Furthermore, the structure of the two-stage lifting device includes a lifting cylinder, a first lifting device base plate, a first lifting cutting plate, a second lifting device base plate, a second lifting cutting plate, a lifting device support, and a cutting connecting plate. The lower end of the lifting device support is fixedly mounted on the upper side of the base. The first and second lifting device base plates are vertically spaced and fixedly mounted on the lifting device support. The first lifting cutting plate is movably matched between the first and second lifting device base plates. The second lifting cutting plate is movably mounted on the outside of the second lifting device base plate. A lifting cylinder is fixedly mounted on the outside of the first lifting device base plate. The lower ends of both the first and second lifting cutting plates are fixedly mounted on the cutting connecting plate. One end of the cutting connecting plate is connected to the piston rod of the lifting cylinder, and the first and second lifting cutting plates are driven to move up and down reciprocally by the lifting cylinder.

[0012] Furthermore, the upper ends of the first lifting device base plate, the first lifting and cutting plate, the second lifting device base plate, and the second lifting and cutting plate are all provided with inclined surfaces in the same direction, which are inclined downward toward the screening vibration feeding mechanism.

[0013] Further, the structure of the screening vibration feeding mechanism includes: a vibrator, a vibration feeding mechanism base anti-vibration column, a vibration feeding mechanism base, a vibration feeding mechanism fixing plate, a contour feeding channel, an air blowing fixing block, a material distribution and nail receiving plate pad, a material distribution and nail receiving plate, a screw height limiting plate pad, a screw height limiting plate support, a screw height limiting plate, a screw presence / absence sensor bracket, and a screw presence / absence sensor. The vibration feeding mechanism base is fixedly mounted on the upper side of the base via the vibration feeding mechanism base anti-vibration column. The vibrator is fixedly mounted on the upper side of the vibration feeding mechanism base. A vibration feeding mechanism fixing plate is fixedly mounted on the upper side of the vibrator. A contour feeding channel is fixed to one end of the upper side of the vibration feeding mechanism fixing plate. The contour feeding channel is aligned with the discharge end of the lifting part of the two-stage lifting device. A discharge groove is provided on the vibration feeding mechanism fixing plate on the discharge port side of the contour feeding channel. The trough and the contouring channel are arranged in the same direction. A material distribution and receiving plate pad is provided on the vibrating feeding mechanism fixing plate on both sides of the discharge trough. A material distribution and receiving plate is provided on each of the material distribution and receiving plate pads. A screw height limiting plate pad is also provided on the upper side of the vibrating feeding mechanism fixing plate. A screw height limiting plate support is provided on the screw height limiting plate pad. The screw height limiting plate support is horizontally positioned above the material distribution and receiving plate. A screw height limiting plate is provided at the end of the screw height limiting plate support. The screw height limiting plate is located directly above the discharge trough and is arranged along the direction of the discharge trough. A screw presence / absence sensor is fixedly mounted on the vibrating feeding mechanism fixing plate via a screw presence / absence sensor bracket. The detection end of the screw presence / absence sensor extends into the space between the material distribution and receiving plates above the discharge trough. An air-blowing fixing block is provided between the material distribution and receiving plates and the contouring channel.

[0014] Furthermore, the cutting mechanism is fixedly mounted on the screening vibration feeding mechanism. The structure of the cutting mechanism includes a cutting cylinder, a cutting cylinder mounting base, a cutting slider pressure plate, a lower nail guide plate, a lower nail opening, and a connecting base plate. The connecting base plate is fixedly mounted on the screening vibration feeding mechanism. The cylinder body of the cutting cylinder is connected and fixed to the connecting base plate through the cutting slider pressure plate. The piston rod of the cutting cylinder is connected to the cutting cylinder mounting base. The cutting cylinder mounting base has a groove with a screw outline on the side facing the screening vibration feeding mechanism. The bottom of the cutting cylinder mounting base has a lower nail guide plate. The cutting cylinder mounting base can be displaced relative to the lower nail guide plate under the drive of the cutting cylinder. The lower nail guide plate has a lower nail opening on its lower side.

[0015] Furthermore, the outer side of the cutting cylinder fixing seat is provided with a slide side connecting plate, a slide side support plate, a bottom plate sealing plate, an upper end clamping plate, a slide bottom plate, and a cutting plate. The slide side connecting plate, slide side support plate, bottom plate sealing plate, upper end clamping plate, slide bottom plate, and cutting plate are connected and fixed to form a cavity. The cutting cylinder fixing seat is slidably disposed in the cavity. The piston rod of the cutting cylinder is connected to the slide side connecting plate, and the cutting cylinder fixing seat can be relatively displaced within the cavity.

[0016] Furthermore, the cutting cylinder mounting base is provided with guide structures for displacement guidance on the sides of the slide plate bottom plate and the bottom plate sealing plate.

[0017] Furthermore, both the upper jaw plate and the cutting plate are provided with material shielding ribs on their outer sides. The material shielding ribs are fixedly mounted on the connecting base plate, and the material shielding ribs are provided with notches for screws to pass through.

[0018] Furthermore, sensors are installed in both the large and small hoppers.

[0019] The advantages of this invention compared to existing technologies are as follows: By setting a baffle plate inside the large hopper, the feeding speed of screws is slowed down, preventing screws from accumulating and blocking the feeding port of the large hopper. After the screws are lifted onto the screening vibration feeding mechanism, the screw heads are made to face upwards and enter the discharge groove on the fixing plate of the vibration feeding mechanism using the contour material channel and the air blowing fixing block. Then, the screws vibrate and enter the cutting cylinder fixing seat of the cutting mechanism in sequence. Under the action of the cutting cylinder, the shell formed by the connection of the slide plate side connecting plate, slide plate side support plate, bottom plate sealing plate, upper end clamping plate, slide plate bottom plate and cutting plate is pushed. The movement of the shell drives the internal cutting cylinder fixing seat to move. During the movement, the screws in the cutting cylinder fixing seat align with the lower nail guide plate and fall down, and then enter the nail feeding channel from the nail opening. The nail feeding process of this invention is smooth and less prone to nail jamming, which greatly improves the stability of the feeding, improves the nail feeding efficiency, and effectively protects the coating. Attached Figure Description

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 is a schematic diagram of the structure of the present invention.

[0022] Figure 2 is a top view of the structure of the present invention.

[0023] Figure 3 is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 4 is a two-dimensional structural schematic diagram of the present invention.

[0025] Figure 5 is a three-dimensional structural schematic diagram of the present invention.

[0026] Figure 6 is a schematic diagram of the feeding mechanism in this invention.

[0027] Figure 7 is a three-dimensional schematic diagram of the cutting mechanism in this invention.

[0028] Figure 8 is a partial perspective view of the cutting mechanism in this invention.

[0029] Figure 9 is a partial perspective view of the cutting mechanism in this invention.

[0030] Figure 10 is a three-dimensional structural schematic diagram of the screening vibration feeding mechanism in this invention.

[0031] Figure 11 is a three-dimensional structural schematic diagram of the screening vibration feeding mechanism in this invention.

[0032] Figure 12 is a three-dimensional structural schematic diagram of the two-stage lifting device in this invention.

[0033] Figure 13 is a three-dimensional structural schematic diagram of the two-stage lifting device in this invention.

[0034] In the diagram: 1 is the base, 2 is the large hopper support, 3 is the large hopper, 4 is the large hopper baffle, 5 is the feeding mechanism, 51 is the feeding cylinder, 52 is the feeding plate, 53 is the support rib, 54 is the feeding support, 55 is the feeding port, 6 is the cutting mechanism, 60 is the connecting base plate, 61 is the cutting cylinder, 62 is the cutting cylinder fixing seat, 63 is the cutting slider pressure plate, 64 is the lower nail guide plate, 65 is the lower nail opening, 66 is the slide plate side connecting plate, 67 is the slide plate side support plate, 68 is the bottom plate sealing plate, 69 is the upper end clamping plate, 610 is the slide plate bottom plate, 611 is the cutting plate, 612 is the shielding plate rib, 7 is the screening vibration feeding mechanism, 71 is the vibrator, 72 is the vibrator. 73 is the anti-vibration column of the feeding mechanism base, 74 is the base of the vibrating feeding mechanism, 75 is the fixed plate of the vibrating feeding mechanism, 76 is the conformal material channel, 77 is the air blowing fixed block, 78 is the material distribution and nail receiving plate pad, 79 is the screw height limiting plate pad, 710 is the screw height limiting plate support, 711 is the screw height limiting plate, 712 is the screw presence or absence sensor bracket, 713 is the screw presence or absence sensor, 8 is the two-stage lifting device, 81 is the lifting cylinder, 82 is the base plate of the first lifting device, 83 is the first lifting and cutting plate, 84 is the base plate of the second lifting device, 85 is the second lifting and cutting plate, 86 is the lifting device support, 87 is the cutting connecting plate, 9 is the small hopper, and 10 is the sensor. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments.

[0036] As shown in Figures 1 to 13, the present invention provides a nail feeding device, comprising a base 1, a large hopper support 2, and a large hopper 3. The large hopper 3 is fixed to the base 1 via the large hopper support 2, which has a plate-like structure. Multiple large hopper support 2s are arranged around the large hopper 3. The upper end of the large hopper support 2 is fixedly connected to the outer side of the large hopper 3, and the lower end of the large hopper support 2 is fixedly disposed on the upper side of the base 1. A large hopper baffle 4 is provided on the inner side of the large hopper 3. One side of the large hopper baffle 4 is fixedly disposed on the inner side wall of the large hopper 3, and the large hopper baffle 4 is arranged around the discharge port of the large hopper 3, maintaining a certain gap between it and the discharge port. During feeding, the screws enter the discharge port sequentially through this gap, preventing material accumulation and blockage of the discharge port.

[0037] A feeding mechanism 5 is provided at the discharge port of the large hopper 3. The feeding mechanism 5 is used to open and close the discharge port of the large hopper 3. A small hopper 9 is provided below the feeding mechanism 5. The small hopper 9 is fixedly mounted on the upper side of the base 1 by a two-stage lifting device 8. The lower end of the two-stage lifting device 8 is fixed on the base 1. The lifting part located at the upper end of the two-stage lifting device 8 passes through the small hopper 9 and extends above the small hopper 9. The lifting part of the two-stage lifting device 8 is connected to the screening vibration feeding mechanism 7. The inlet of the screening vibration feeding mechanism 7 is aligned with the outlet of the lifting part of the two-stage lifting device 8. The outlet of the screening vibration feeding mechanism 7 is aligned with the inlet of the cutting mechanism 6. Sensors 10 are provided in both the large hopper 3 and the small hopper 9.

[0038] The feeding mechanism 5 comprises a feeding cylinder 51, a feeding plate 52, a supporting rib 53, a feeding support 54, and a feeding port 55. The upper end of the feeding support 54 is fixedly mounted on the outer side of the bottom of the large hopper 3, and the lower end of the feeding support 54 is fixedly mounted on the upper side of the base 1. The supporting rib 53 is horizontally mounted below the feeding port of the large hopper 3. One end of the supporting rib 53 is fixedly mounted on the feeding support 54, and the other end of the supporting rib 53 is fixedly mounted with the feeding cylinder 51. The cylinder body of the feeding cylinder 51 is fixed to the supporting rib 53. Above, a discharge plate 52 is fixedly installed on the piston rod of the discharge cylinder 51; the upper end of the discharge port 55 is movably installed on the support rib plate 53. The position of the discharge port 55 is adjusted so that it can be aligned with the discharge port of the large hopper 3, and the upper end of the discharge port 55 is in close contact with the discharge port of the large hopper 3. The lower end of the discharge port 55 is located below the support rib plate 53. The discharge port 55 is provided with an insertion slot for the discharge plate 52 to pass through. Under the drive of the discharge cylinder 51, the discharge plate 52 can match and pass through the discharge port 55 to block or open the discharge port of the large hopper 3.

[0039] The two-stage lifting device 8 comprises a lifting cylinder 81, a first lifting device base plate 82, a first lifting cutting plate 83, a second lifting device base plate 84, a second lifting cutting plate 85, a lifting device support 86, and a cutting connecting plate 87. The lower end of the lifting device support 86 is fixedly mounted on the upper side of the base 1. The first lifting device base plate 82 and the second lifting device base plate 84 are vertically spaced and fixedly mounted on the lifting device support 86. The first lifting cutting plate 83 is movably matched between the first lifting device base plate 82 and the second lifting device base plate 84. The second lifting cutting plate 85 is movably mounted on the outside of the second lifting device base plate 84. The lifting cylinder 81 is fixedly mounted on the outside of the first lifting device base plate 82. The lower ends of both the first lifting cutting plate 83 and the second lifting cutting plate 85 are fixedly mounted on the cutting connecting plate 87. One end of the cutting connecting plate 87 is connected to the piston rod of the lifting cylinder 81. The first lifting cutting plate 83 and the second lifting cutting plate 85 are driven to move up and down reciprocally by the lifting cylinder 81. The structure of the two-stage lifting device 8 is as follows: the upper ends of the first lifting device base plate 82, the first lifting cutting plate 83, the second lifting device base plate 84, and the second lifting cutting plate 85 are all provided with inclined surfaces in the same direction, which are inclined downward toward the screening vibration feeding mechanism 7.

[0040] The structure of the screening vibration feeding mechanism 7 includes: a vibrator 71, a vibration feeding mechanism base anti-vibration column 72, a vibration feeding mechanism base 73, a vibration feeding mechanism fixing plate 74, a contour material channel 75, an air blowing fixing block 76, a material distribution and nail receiving plate pad 77, a material distribution and nail receiving plate 78, a screw height limiting plate pad 79, a screw height limiting plate support 710, a screw height limiting plate 711, a screw presence / absence sensor bracket 712, and a screw presence / absence sensor 713. The vibration feeding mechanism base 73 is connected to the vibration feeding machine. The anti-vibration column 72 of the base is fixedly installed on the upper side of the base 1. The vibrator 71 is fixedly installed on the upper side of the vibrating feeding mechanism base 73. A vibrating feeding mechanism fixing plate 74 is fixedly installed on the upper side of the vibrator 71. A contoured material channel 75 is fixed to one end of the upper side of the vibrating feeding mechanism fixing plate 74. The contoured material channel 75 is aligned with the discharge end of the lifting part of the two-stage lifting device 8. A discharge groove is provided on the vibrating feeding mechanism fixing plate 74 on the discharge port side of the contoured material channel 75. The discharge groove is aligned with... The contour feeding channels 75 are arranged in the same direction. On both sides of the vibrating feeding mechanism fixing plate 74 on both sides of the discharge groove, there are material distribution and receiving plate pads 77. Each material distribution and receiving plate pad 77 is equipped with a material distribution and receiving plate 78. A screw height limiting plate pad 79 is also provided on the upper side of the vibrating feeding mechanism fixing plate 74. A screw height limiting plate support 710 is provided on the screw height limiting plate pad 79. The screw height limiting plate support 710 is arranged horizontally above the material distribution and receiving plate 78. The end of the screw height limiting plate support 710... The part is provided with a screw height limit plate 711, which is located directly above the discharge groove and is arranged along the direction of the discharge groove. The screw presence sensor 713 is fixedly mounted on the vibrating feeding mechanism fixing plate 74 by a screw presence sensor bracket 712. The detection end of the screw presence sensor 713 extends into the space between the material distribution and receiving plates 78 above the discharge groove. An air blowing fixing block 76 is provided between the material distribution and receiving plates 78 and the contour material channel 75.

[0041] The cutting mechanism 6 is fixedly mounted on the screening vibration feeding mechanism 7. The structure of the cutting mechanism 6 includes a cutting cylinder 61, a cutting cylinder mounting base 62, a cutting slider pressure plate 63, a nail guide plate 64, a nail opening 65, and a connecting base plate 60. The connecting base plate 60 is fixedly mounted on the screening vibration feeding mechanism 7. The cylinder body of the cutting cylinder 61 is connected and fixed to the connecting base plate 60 through the cutting slider pressure plate 63. The piston rod of the cutting cylinder 61 is connected to the cutting cylinder mounting base 62. The cutting cylinder mounting base 62 has a groove with a screw outline on the side facing the screening vibration feeding mechanism 7. The bottom of the cutting cylinder mounting base 62 has a nail guide plate 64. The cutting cylinder mounting base 62 can be displaced relative to the nail guide plate 64 under the drive of the cutting cylinder 61. The nail opening 65 is provided on the lower side of the nail guide plate 64. The outer side of the cutting cylinder fixing seat 62 is provided with a slide side connecting plate 66, a slide side support plate 67, a bottom plate sealing plate 68, an upper end clamping plate 69, a slide bottom plate 610, and a cutting plate 611. The slide side connecting plate 66, slide side support plate 67, bottom plate sealing plate 68, upper end clamping plate 69, slide bottom plate 610, and cutting plate 611 are connected and fixed to form a cavity. The cutting cylinder fixing seat 62 is slidably disposed in this cavity. The piston rod of the cutting cylinder 61 is connected to the slide side connecting plate 66, and the cutting cylinder fixing seat 62 can move relative to the slide bottom plate 610 within the cavity. The cutting cylinder fixing seat 62 is provided with guide structures for displacement guidance on the sides facing the slide bottom plate 610 and the bottom plate sealing plate 68. Both the upper jaw plate 69 and the cutting plate 611 are provided with a material shielding rib 612 on their outer sides. The material shielding rib 612 is fixedly installed on the connecting base plate 60 and has a notch for screws to pass through.

[0042] The working process of this invention is as follows: Screws are poured into the large hopper 3. Under the vibration of the screening and vibrating feeding mechanism 7, the screws enter the discharge port of the large hopper 3 through the gap between the large hopper 3 and the large hopper baffle 4. The discharge mechanism 5 opens the discharge port, and the screws fall into the small hopper 9. Under the action of the two-stage lifting device 8, the screws are lifted to the screening and vibrating feeding mechanism 7. After passing through the screening and vibrating feeding mechanism 7, the screws enter the cutting mechanism 6 and are then fed one by one to the head of the screw-driving device through the cutting mechanism 6.

[0043] In this invention, by setting a large hopper baffle 4 inside the large hopper 3, the feeding speed of the screws is slowed down, preventing the screws from accumulating and blocking the feeding port of the large hopper 3. After the screws are lifted onto the screening vibration feeding mechanism 7, the contour material channel 75 and the air blowing fixing block 76 work together to make the screw heads face upwards and enter the discharge groove on the fixing plate 74 of the vibration feeding mechanism. Then, the screws vibrate and sequentially enter the cutting cylinder fixing seat 62 of the cutting mechanism 6. Under the action of the cutting cylinder 61, the side connecting plate 66 of the slide plate is pushed. The shell formed by the side support plate 67, bottom sealing plate 68, upper clamping plate 69, bottom plate 610, and cutting plate 611 of the skateboard is connected together. The movement of the shell drives the internal cutting cylinder fixing seat 62 to move. During the movement, the screw in the cutting cylinder fixing seat 62 is aligned with the lower nail guide plate 64 and falls off, and then enters the nail feeding channel from the lower nail opening 65. The nail feeding process of the present invention is smooth and less prone to nail jamming, which greatly improves the stability of the nail feeding and improves the nail feeding efficiency.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A nail feeding device comprising a base (1), a large hopper support seat (2) and a large hopper (3), said large hopper (3) being fixed to the upper part of the base (1) by means of the large hopper support seat (2), characterized in that, Multiple large hopper support seats (2) are arranged around the large hopper (3). The upper end of the large hopper support seat (2) is fixedly connected to the outer side of the large hopper (3), and the lower end of the large hopper support seat (2) is fixedly arranged on the upper side of the base (1). The inner side of the large hopper (3) is provided with a large hopper baffle plate (4). One side of the large hopper baffle plate (4) is fixedly installed on the inner side wall of the large hopper (3). The large hopper baffle plate (4) is arranged around the discharge port of the large hopper (3) and maintains a certain gap with the discharge port of the large hopper (3). The large hopper (3) is provided with a feeding mechanism (5) at its discharge port, which is used to open and close the discharge port of the large hopper (3); A small hopper (9) is provided below the feeding mechanism (5). The small hopper (9) is fixedly mounted on the upper side of the base (1) by a two-stage lifting device (8). The lower end of the two-stage lifting device (8) is fixed on the base (1). The lifting part located at the upper end of the two-stage lifting device (8) passes through the small hopper (9) and extends to the top of the small hopper (9). The lifting part of the two-stage lifting device (8) is connected to the screening vibration feeding mechanism (7). The inlet of the screening vibration feeding mechanism (7) is aligned with the outlet of the lifting part of the two-stage lifting device (8). The outlet of the screening vibration feeding mechanism (7) is aligned with the inlet of the cutting mechanism (6).

2. A nail feeding device according to claim 1, characterized in that The structure of the feeding mechanism (5) is as follows: it includes a feeding cylinder (51), a feeding plate (52), a support rib (53), a feeding support (54), and a feeding port (55). The upper end of the feeding support (54) is fixedly set on the outer side of the bottom of the large hopper (3), and the lower end of the feeding support (54) is fixedly set on the upper side of the base (1). The support rib (53) is horizontally set below the feeding port of the large hopper (3). One end of the support rib (53) is fixedly set on the feeding support (54), and the other end of the support rib (53) is fixedly set with a feeding cylinder (51). The cylinder body of the feeding cylinder (51) is fixed on the support rib (53), and the feeding plate (52) is fixedly set on the piston rod of the feeding cylinder (51). The upper end of the discharge port (55) is movably mounted on the support rib plate (53). The position of the discharge port (55) is adjusted so that it can be aligned with the discharge port of the large hopper (3), and the upper end of the discharge port (55) is close to the discharge port of the large hopper (3). The lower end of the discharge port (55) is located below the support rib plate (53). The discharge port (55) is provided with an insertion slot for the discharge plate (52) to pass through. The discharge plate (52) can be matched and passed through the discharge port (55) under the drive of the discharge cylinder (51) to block or open the discharge port of the large hopper (3).

3. The nail feeding device according to claim 1, wherein The structure of the two-stage lifting device (8) includes a lifting cylinder (81), a first lifting device base plate (82), a first lifting cutting plate (83), a second lifting device base plate (84), a second lifting cutting plate (85), a lifting device support (86), and a cutting connecting plate (87). The lower end of the lifting device support (86) is fixedly mounted on the upper side of the base (1). The first lifting device base plate (82) and the second lifting device base plate (84) are vertically spaced and fixedly mounted on the lifting device support (86). The first lifting cutting plate (83) is movably matched to the first lifting device base plate. (82) Between the second lifting device base plate (84) and the second lifting cutting plate (85), the second lifting cutting plate (85) is movably disposed on the outside of the second lifting device base plate (84). The lifting cylinder (81) is fixedly disposed on the outside of the first lifting device base plate (82). The lower ends of the first lifting cutting plate (83) and the second lifting cutting plate (85) are both fixedly disposed on the cutting connecting plate (87). One end of the cutting connecting plate (87) is connected to the piston rod of the lifting cylinder (81). The first lifting cutting plate (83) and the second lifting cutting plate (85) are driven to move up and down reciprocally by the lifting cylinder (81).

4. A nail feeding device according to claim 3, characterized in that The upper ends of the first lifting device base plate (82), the first lifting cutting plate (83), the second lifting device base plate (84), and the second lifting cutting plate (85) are all provided with inclined surfaces in the same direction, which are inclined downward toward the screening vibration feeding mechanism (7).

5. The nail feeding device according to claim 1, wherein The structure of the screening vibration feeding mechanism (7) includes: a vibrator (71), a vibration feeding mechanism base anti-vibration column (72), a vibration feeding mechanism base (73), a vibration feeding mechanism fixing plate (74), a contour material channel (75), an air blowing fixing block (76), a material distribution and nail receiving plate pad (77), a material distribution and nail receiving plate (78), a screw height limiting plate pad (79), a screw height limiting plate support (710), a screw height limiting plate (711), a screw presence / absence sensor bracket (712), and a screw presence / absence sensor (713). The vibration feeding mechanism base (73) is connected by... The anti-vibration column (72) of the vibrating feeding mechanism base is fixedly installed on the upper side of the base (1). The vibrator (71) is fixedly installed on the upper side of the vibrating feeding mechanism base (73). A vibrating feeding mechanism fixing plate (74) is fixedly installed on the upper side of the vibrating feeding mechanism fixing plate (74). A contoured material channel (75) is fixed at one end of the upper side of the vibrating feeding mechanism fixing plate (74). The contoured material channel (75) is aligned with the discharge end of the lifting part of the two-stage lifting device (8). A discharge groove is provided on the vibrating feeding mechanism fixing plate (74) on the discharge port side of the contoured material channel (75). The material groove and the contoured material channel (75) are arranged in the same direction. A material distribution and receiving plate pad (77) is provided on the vibrating feeding mechanism fixing plate (74) on both sides of the discharge groove. A material distribution and receiving plate (78) is provided on each of the material distribution and receiving plate pads (77). A screw height limiting plate pad (79) is also provided on the upper side of the vibrating feeding mechanism fixing plate (74). A screw height limiting plate support (710) is provided on the screw height limiting plate pad (79). The screw height limiting plate support (710) is arranged horizontally above the material distribution and receiving plate (78). The end of the feeder is provided with a screw height limit plate (711), which is located directly above the discharge groove and is arranged along the discharge groove. The screw presence sensor (713) is fixedly mounted on the vibrating feeder fixing plate (74) by a screw presence sensor bracket (712). The detection end of the screw presence sensor (713) extends into the space between the material distribution receiving plate (78) above the discharge groove. An air blowing fixing block (76) is provided between the material distribution receiving plate (78) and the contour material channel (75).

6. The nail feeding device according to claim 1, wherein The cutting mechanism (6) is fixedly mounted on the screening vibration feeding mechanism (7). The structure of the cutting mechanism (6) includes a cutting cylinder (61), a cutting cylinder mounting base (62), a cutting slider pressure plate (63), a lower nail guide plate (64), a lower nail opening (65), and a connecting base plate (60). The connecting base plate (60) is fixedly mounted on the screening vibration feeding mechanism (7). The cylinder body of the cutting cylinder (61) is connected and fixed to the connecting base plate (60) through the cutting slider pressure plate (63). On the cutting cylinder (61), the piston rod is connected to the cutting cylinder mounting base (62); the cutting cylinder mounting base (62) is provided with a screw profile groove on the side facing the screening vibration feeding mechanism (7), and a lower nail guide plate (64) is provided at the bottom of the cutting cylinder mounting base (62). The cutting cylinder mounting base (62) can be displaced relative to the lower nail guide plate (64) under the drive of the cutting cylinder (61). A lower nail opening (65) is provided on the lower side of the lower nail guide plate (64).

7. A nail feeding device according to claim 6, characterized in that The outer side of the cutting cylinder fixing seat (62) is provided with a slide side connecting plate (66), a slide side support plate (67), a bottom plate sealing plate (68), an upper end clamping plate (69), a slide bottom plate (610), and a cutting plate (611). The slide side connecting plate (66), slide side support plate (67), bottom plate sealing plate (68), upper end clamping plate (69), slide bottom plate (610), and cutting plate (611) are connected and fixed to form a cavity. The cutting cylinder fixing seat (62) is slidably disposed in the cavity. The piston rod of the cutting cylinder (61) is connected to the slide side connecting plate (66). The cutting cylinder fixing seat (62) can be relatively displaced in the cavity.

8. A nail feeding device according to claim 7, characterized in that The cutting cylinder mounting base (62) is provided with a guide structure for displacement guidance on the side facing the slide plate bottom plate (610) and the bottom plate sealing plate (68).

9. A nail feeding device according to claim 8, characterized in that The upper end bayonet plate (69) and the cutting plate (611) are both provided with a material shielding plate rib (612) on the outside. The material shielding plate rib (612) is fixedly installed on the connecting base plate (60). The material shielding plate rib (612) is provided with a notch for screws to pass through.

10. The nail feeding device according to claim 1, wherein Sensors (10) are installed in both the large hopper (3) and the small hopper (9).

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