Screw transfer feeding mechanism

Abstract

The utility model discloses a screw transfer feeding mechanism which comprises a vibration disc, a feeding mechanism and a feeding mechanism. The transfer unit comprises a transfer pipe and at least two first blocking devices, the top end of the transfer pipe is connected with the discharging groove through a pipeline, each first blocking device is provided with a first blocking end capable of stretching into or withdrawing from the transfer pipe, and the first blocking devices are arranged in the length direction of the transfer pipe at intervals; the feeding unit comprises a feeding pipe and at least two second blocking devices, the feeding pipe is located below the transfer pipe, each second blocking device is provided with a second blocking end capable of stretching into or retreating from the transfer pipe, and the second blocking devices are arranged in the length direction of the feeding pipe at intervals; the screw feeding mechanism improves the flexibility of screw feeding and use and the universality of installation and use of the whole mechanism, and is particularly suitable for equipment such as a screw locking machine head with a large movement range.

Description

Technical Field

[0001] The utility model relates to a feeding mechanism, in particular to a screw transfer feeding mechanism. Background Art

[0002] In the equipment for automatically locking screws, it is usually necessary to use a vibrating bowl to discharge screws, and then convey them to the screw locking head by an air pipe. For the equipment with a large moving range of the screw locking head, the air pipe for feeding screws is likely to interfere with the activities of other actuators. Moreover, the volume and weight of the vibrating bowl are generally large, making it difficult to directly install and move it together with the screw locking head. Therefore, there is an urgent need for a mechanism that can conveniently feed screws into a screw locking head with a large moving range requirement. Content of the Utility Model

[0003] The purpose of the utility model is to provide a screw transfer feeding mechanism to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution of the utility model to solve its technical problems is as follows:

[0005] The screw transfer feeding mechanism includes: a vibrating bowl having a discharge chute; a transfer unit including a transfer pipe and a first blocking device. The top end of the transfer pipe is connected to the discharge chute through a pipeline. The first blocking device has a first blocking end that can extend into or withdraw from the transfer pipe. At least two first blocking devices are arranged at intervals along the length direction of the transfer pipe; a feeding unit including a feeding pipe and a second blocking device. The feeding pipe is located below the transfer pipe. The second blocking device has a second blocking end that can extend into or withdraw from the transfer pipe. At least two second blocking devices are arranged at intervals along the length direction of the feeding pipe.

[0006] The technical solution has at least the following beneficial effects: The vibrating bowl and the transfer unit are installed on a fixed platform or frame and are used to arrange and temporarily store screws in transit. The feeding unit can be installed on an external moving actuator and move together with the moving actuator to supply screws during processing. Specifically, after the screws are arranged by the vibrating bowl, the screws are sent from the discharge chute into the transfer pipe through a pipeline. At this time, the first blocking end at the bottom extends into the transfer pipe to block, which can block the screws arranged in the transfer pipe and prevent them from falling. The first blocking end at the top withdraws from the transfer pipe, so that the screws sent from the pipeline can enter the transfer pipe for discharging. After the discharging is completed, the first blocking end at the top extends into the transfer pipe to block, preventing continuous feeding of screws from the discharge chute into the transfer pipe. When the feeding unit needs to be replenished with screws, the feeding pipe is moved to be directly opposite the transfer pipe. At this time, the first blocking end at the bottom withdraws from the transfer pipe, the second blocking end at the top withdraws from the feeding pipe, and the second blocking end at the bottom extends into the feeding pipe. The screws arranged in the transfer pipe directly fall into the feeding pipe, realizing rapid feeding in the feeding pipe. After the feeding is completed, the feeding unit can move with the moving actuator. By alternately controlling the upper and lower second blocking ends to enter and exit the feeding pipe, the screws can be sent out of the feeding pipe one by one, and the transfer unit can continue to replenish screws from the vibrating bowl to prepare for the next feeding to the feeding unit. In this way, the screw feeding is divided into two parts: transfer and temporary storage and feeding one by one, improving the flexibility of screw feeding and the versatility of the installation and use of the entire mechanism, especially suitable for equipment such as screw locking machine heads with a large movement range.

[0007] As a further improvement of the above technical solution, the transfer pipe includes a first pipe body and a first connection block. There are three first pipe bodies arranged at intervals in the up and down direction, and the first connection blocks are respectively connected between two adjacent first pipe bodies. Through holes communicating with the first pipe body are respectively arranged in the two first connection blocks, and avoidance holes communicating with the through holes are respectively arranged on the outer sides of the two first connection blocks. The top end of the first pipe body located above is connected to the discharge chute through a pipeline. The first blocking ends of the two first blocking devices can respectively extend into or withdraw from the two through holes through the two avoidance holes. The first pipe body located above can be used to connect to the discharge chute through a pipeline. The first pipe body located in the middle can be used to discharge screws in the middle. The second pipe body located at the bottom can be used to send screws to the feeding pipe. The first connection block between the two first pipe bodies allows the first blocking end to extend into or withdraw, so as to realize restricting the falling of screws or releasing the restriction on the falling of screws. For example, when the first blocking end located below extends into the through hole from the avoidance hole, it can block or tighten the screw located at the bottommost side, so as to restrict the screw from falling out of the transfer pipe. When it is necessary to replenish screws into the feeding pipe, the first blocking end located above extends into the through hole from the avoidance hole to restrict the screw in the first pipe body located above from falling, and the first blocking end located below withdraws from the avoidance hole, and the screw in the first pipe body located in the middle can fall into the feeding pipe to realize replenishing screws.

[0008] As a further improvement of the above technical solution, a connecting plate is connected to one side of the first connection block, and the first blocking device is connected to the connecting plate. The connecting plate can connect the first blocking device and the feeding pipe to form an integral body, which is convenient for moving and adjusting the position and improves the installation convenience.

[0009] As a further improvement of the above technical solution, the first blocking device includes a first telescopic drive and a top plate. The first telescopic drive is connected to the connecting plate, the top plate is connected to the first telescopic drive, and the top plate is the first blocking end. The top plate serves as the first blocking end, and the first telescopic drive provides the driving force for the top plate to extend into or withdraw from the transfer pipe. When the first telescopic drive drives the top plate to insert into the through hole from the avoidance hole, it can block or tighten the screw to realize the function of restricting the falling of the screw. When the first telescopic drive drives the top plate to withdraw from the through hole from the avoidance hole, the restriction on the falling of the screw can be released.

[0010] As a further improvement of the above technical solution, a guide opening and a bayonet are sequentially arranged on one side of the top plate close to the through hole in a direction away from the through hole, and the top plate is located on both sides of the guide opening and gradually narrows in a direction close to the bayonet, and the bayonet is in a semicircular shape. When the first telescopic drive drives the top plate to insert into the through hole, the guide opening can facilitate the top plate to clamp the screw portion of the screw into the bayonet during the movement, thereby tightening and limiting the screw, and utilizing the bayonet position of the top plate to limit the head of the screw from falling out downward, effectively preventing the screw from falling off.

[0011] As a further improvement of the above technical solution, the transfer units are arranged in a plurality in the horizontal direction, and the number of the discharge troughs and the number of the feeding units are equal to the number of the transfer units. The vibration plate can arrange the screws to the plurality of discharge troughs and send them out, and the screws of the plurality of discharge troughs are respectively sent to the transfer tubes of the plurality of transfer units for temporary storage. When feeding is required, the feeding tubes of the plurality of feeding units are respectively opposite to the plurality of transfer tubes, and the plurality of transfer tubes respectively transport the screws to the plurality of feeding tubes.

[0012] As a further improvement of the above technical solution, the top of the feeding tube is connected to a guide tube, and the inner diameter of the guide tube gradually decreases from top to bottom. The gradually narrowing internal design of the guide tube can facilitate the screws to fall from the transfer tube into the guide tube more smoothly, thereby improving the smoothness and stability of adding screws to the upper feeding tube.

[0013] As a further improvement of the above technical solution, a blowing joint is provided on the outer side of the bottom of the feeding pipe. When in use, the blowing joint can be connected to an air source of an external device. When the feeding pipe feeds screws to the actuator of the external device, the blowing joint can blow air into the feeding pipe, and the airflow can assist the screws to be sent downward, thereby improving the stability of the screw feeding.

[0014] As a further improvement of the above technical solution, a first proximity switch is provided on the outer side of the transfer tube. The first proximity switch can be used to detect whether the screws in the transfer tube have been discharged, which is conducive to improving the accuracy of the screw discharge.

[0015] As a further improvement of the above technical solution, a second proximity switch is arranged on the outer side of the feeding tube. Similarly, the second proximity switch can be used to detect whether the screws in the feeding tube are completely discharged, which is conducive to improving the accuracy of the screw discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0017] Figure 1 It is the overall three-dimensional view of the present utility model.

[0018] Figure 2 It is the three-dimensional view of the transfer unit of the present utility model.

[0019] Figure 3 It is the three-dimensional view of the loading unit of the present utility model.

[0020] In the attached drawings: 100 - vibrating bowl, 200 - transfer unit, 211 - first pipe body, 212 - first connecting block, 220 - connecting plate, 221 - guiding port, 230 - first telescopic drive, 240 - top plate, 250 - first proximity switch, 300 - loading unit, 310 - loading pipe, 320 - second blocking device, 321 - second blocking end, 330 - guiding pipe, 340 - blowing joint, 350 - second proximity switch. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the attached drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the attached drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0024] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the technical field can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0025] Refer to Figure 1 、 Figure 2 And Figure 3, The screw transfer and feeding mechanism includes a vibrating bowl 100, a transfer unit 200 and a feeding unit 300. Among them, the vibrating bowl 100 has a discharge chute; the transfer unit 200 includes a transfer pipe and a first blocking device. The top end of the transfer pipe is connected to the discharge chute through a pipeline. The first blocking device has a first blocking end that can extend into or withdraw from the transfer pipe. At least two first blocking devices are arranged at intervals along the length direction of the transfer pipe; the feeding unit 300 includes a feeding pipe 310 and a second blocking device 320. The feeding pipe 310 is located below the transfer pipe. The second blocking device 320 has a second blocking end 321 that can extend into or withdraw from the transfer pipe. At least two second blocking devices 320 are arranged at intervals along the length direction of the feeding pipe 310.

[0026] As can be seen from the above, the vibrating bowl 100 and the transfer unit 200 are installed on a fixed platform or frame for arranging and temporarily storing screws in transit, while the feeding unit 300 can be installed on an external movable actuator and move together with the movable actuator to supply screws during processing. Specifically, after the screws are arranged by the vibrating bowl 100, the screws are sent into the transfer pipe from the discharge chute through a pipeline. At this time, the lowermost first blocking end extends into the transfer pipe to block, which can block the screws arranged in the transfer pipe to prevent them from falling, while the uppermost first blocking end withdraws from the transfer pipe, so that the screws sent from the pipeline can enter the transfer pipe for discharging. After the discharging is completed, the uppermost first blocking end extends into the transfer pipe to block, preventing continuous feeding of screws from the discharge chute to the transfer pipe. When the feeding unit 300 needs to be replenished with screws, the feeding pipe 310 is moved to be directly opposite to the transfer pipe. At this time, the lowermost first blocking end is withdrawn from the transfer pipe, the uppermost second blocking end 321 withdraws from the feeding pipe 310, and the lowermost second blocking end 321 extends into the feeding pipe 310. The screws arranged in the transfer pipe directly fall into the feeding pipe 310, realizing rapid feeding in the feeding pipe 310. After the feeding is completed, the feeding unit 300 can move with the movable actuator. By alternately controlling the upper and lower second blocking ends 321 to enter and exit the feeding pipe 310, the screws can be sent out of the feeding pipe 310 one by one, while the transfer unit 200 can continue to replenish screws from the vibrating bowl 100 to prepare for the next feeding to the feeding unit 300. In this way, the screw feeding is divided into two parts: transfer and temporary storage and feeding one by one, improving the flexibility of screw feeding and the versatility of the installation and use of the entire mechanism, especially suitable for equipment such as screw locking machine heads with a large movement range.

[0027] The transfer pipe can be a whole straight tube body, and in order to improve the stability when the first blocking end is inserted into the tube body and facilitate the movement of the first blocking section in the tube body, the transfer pipe can be divided into multiple connection structures, and another connection structure is provided at the position where the first blocking end moves. Specifically, the transfer pipe includes a first tube body 211 and a first connecting block 212, and three first tube bodies 211 are arranged at intervals in the up and down directions. The first connecting blocks 212 are respectively connected between two adjacent first tube bodies 211, and the two first connecting blocks 212 are respectively provided with through holes connected to the first tube bodies 211. The outer sides of the two first connecting blocks 212 are respectively provided with avoidance holes connected to the through holes. The top end of the first tube body 211 located above is connected to the discharge trough through a pipeline, and the first blocking ends of the two first blocking devices can extend into or exit the two through holes from the two avoidance holes respectively. The first tube body 211 located at the top can be used to connect with the discharge trough through a pipeline, the first tube body 211 located in the middle can be used to discharge the screws in the middle, and the second tube body located at the bottom can be used to send the screws to the feeding tube 310, and the first connecting block 212 between the two first tube bodies 211 can be used for the first blocking end to extend in or withdraw, so as to limit the falling of the screws or release the restriction on the falling of the screws. For example, the first blocking end located at the bottom extends into the through hole from the avoidance hole, which can block or tighten the screws located at the bottom side, thereby limiting the screws from falling from the transfer tube. When it is necessary to supplement the screws into the upper feeding tube 310, the first blocking end located at the top extends into the through hole from the avoidance hole to limit the screws in the first tube body 211 located at the top from falling, and the first blocking end located at the bottom withdraws from the avoidance hole, and the screws in the first tube body 211 located in the middle can fall into the upper feeding tube 310 to achieve the supplement of screws.

[0028] The first blocking device can be installed on a structural member of an external device, or can be directly fixed to the first connecting block 212 to form a whole. Specifically, a connecting plate 220 is connected to one side of the first connecting block 212, and the first blocking device is connected to the connecting plate 220. The connecting plate 220 can connect the first blocking device and the feeding tube 310 to form a whole, which is convenient for moving and adjusting the position and improving the convenience of installation.

[0029] The first blocking device is mainly used to form a first blocking end that can extend into or withdraw from the through hole. There are various structural forms. For example, the first blocking device includes a rotary cylinder and a swing arm, and the swing arm is driven and connected by the rotary cylinder. The swing arm is controlled by the rotary cylinder to extend into or withdraw from the through hole. In this embodiment, the first blocking device includes a first telescopic drive 230 and a top plate 240. The first telescopic drive 230 is connected to the connecting plate 220, and the top plate 240 is connected to the first telescopic drive 230. The top plate 240 is the first blocking end. In practical applications, the first telescopic drive 230 is mainly used to provide a driving force for linear movement. There are various structural forms, such as an electric screw rod, a cylinder, or a hydraulic cylinder, etc. The top plate 240 serves as the first blocking end, and the first telescopic drive 230 provides a driving force for the top plate 240 to extend into or withdraw from the transfer tube. When the first telescopic drive 230 drives the top plate 240 to insert into the through hole from the avoidance hole, it can block or tighten the screw to achieve the function of restricting the screw from falling. When the first telescopic drive 230 drives the top plate 240 to withdraw from the through hole from the avoidance hole, the restriction on the screw falling can be released.

[0030] In this embodiment, the top plate 240 restricts the screw in the transfer tube in a tightening manner. Specifically, on the side of the top plate 240 close to the through hole, a guiding opening 221 and a clamping opening are sequentially arranged in the direction away from the through hole. On both sides of the top plate 240 where the guiding opening 221 is located, it gradually narrows in the direction close to the clamping opening. The shape of the clamping opening is semi-circular. When the first telescopic drive 230 drives the top plate 240 to insert into the through hole, the guiding opening 221 can facilitate the top plate 240 to clamp the screw rod part into the clamping opening during the movement process, thereby tightening and limiting the screw, and using the position of the clamping opening of the top plate 240 to restrict the head of the screw from coming out downward, effectively restricting the screw from falling.

[0031] For the feeding pipe 310, it can adopt the same three-section structure as the transfer pipe. For example, the feeding pipe 310 includes a second pipe body and a second connecting block. There are three second pipe bodies arranged at intervals in the vertical direction, and the second connecting blocks are respectively connected between two adjacent second pipe bodies. Or it can directly adopt a second pipe body and a second connecting block, and the second connecting block is connected to the bottom end of the second pipe body. At this time, the two second blocking devices 320 are directly connected to the second connecting block. A through hole communicating with the second pipe body is provided in the second connecting block, and an avoidance hole communicating with the through hole is provided outside the second connecting block, so that the second blocking ends 321 of the two second blocking devices 320 can respectively enter the through hole from the two avoidance holes. During use, the second blocking end 321 located below extends into the through hole from the avoidance hole, and can block or tighten the screws at the bottommost side, so as to limit the screws from falling out of the feeding pipe 310. When it is necessary to send out the screws, the second blocking end 321 located above extends into the through hole from the avoidance hole to limit the second-to-last screw from falling out of the feeding pipe 310, and the second blocking end 321 located below withdraws from the avoidance hole. At this time, the screw at the lowermost position can be directly sent out, realizing the feeding of a single screw.

[0032] The second blocking device 320 is mainly used to form a second blocking end 321 that can extend into or withdraw from the through hole, and there are various structural forms. For example, the second blocking device 320 includes a rotary cylinder and a rotating arm, and the rotating arm is driven and connected by the rotary cylinder, and the rotating arm is controlled by the rotary cylinder to extend into or withdraw from the through hole. In this embodiment, the second blocking device 320 includes a second telescopic drive and a pressing plate. The second telescopic drive is connected to the connecting plate 220, the pressing plate is connected to the second telescopic drive, and the pressing plate is the second blocking end 321. In practical applications, the second telescopic drive is mainly used to provide a driving force for linear movement, and there are various structural forms, such as an electric screw rod, a cylinder or a hydraulic cylinder, etc. The pressing plate serves as the second blocking end 321, and the second telescopic drive provides a driving force for the pressing plate to extend into or withdraw from the feeding pipe 310. When the second telescopic drive drives the pressing plate to insert into the through hole from the avoidance hole, it can block or tighten the screws, realizing the function of restricting the screws from falling. When the second telescopic drive drives the pressing plate to withdraw from the through hole from the avoidance hole, the restriction on the screws falling can be released.

[0033] Similarly, the pressing plate can use the same tightening method as the top plate 240 to tighten the screw into the feeding tube 310. Specifically, the top plate 240 is provided with a guide port 221 and a bayonet in sequence on one side close to the through hole in a direction away from the through hole. The top plate 240 is located on both sides of the guide port 221 and gradually narrows in a direction close to the bayonet. The bayonet is in a semicircular shape. When the second telescopic drive drives the top plate 240 to insert into the through hole, the guide port 221 can facilitate the top plate 240 to insert the screw rod part of the screw into the bayonet during the movement, thereby tightening and limiting the screw, and using the bayonet position of the top plate 240 to limit the head of the screw from falling out downward, effectively preventing the screw from falling.

[0034] In the above embodiment, a discharge trough, a transfer unit 200 and a loading unit 300 on the vibration plate 100 can form a module for screw transfer and loading. In practical applications, multiple actuators are usually configured, especially larger processing equipment. At this time, multiple screw transfer and loading modules can be configured to be paired respectively. Specifically, there are multiple transfer units 200 arranged in a horizontal direction, and the number of the discharge troughs and the number of the loading units 300 are equal to the number of the transfer units 200. The multiple vibration troughs are respectively connected to the top ends of the transfer pipes of the multiple transfer units 200 through pipelines, and the arrangement form of the loading pipes 310 in the multiple loading units 300 is the same as the arrangement form of the multiple transfer pipes, so that the multiple loading pipes 310 can be respectively opposite to the bottom ends of the multiple transfer pipes. The vibration plate 100 can arrange the screws into multiple discharge troughs and deliver them out. The screws in the multiple discharge troughs are respectively delivered to the transfer tubes of the multiple transfer units 200 for temporary storage. When loading is required, the loading tubes 310 of the multiple loading units 300 are respectively opposite to the multiple transfer tubes, and the screws are respectively delivered to the multiple loading tubes 310 by the multiple transfer tubes.

[0035] In some embodiments, the top of the feeding tube 310 is connected to a guide tube 330, and the inner diameter of the guide tube 330 gradually decreases from top to bottom. The gradually narrowing inner design of the guide tube 330 can facilitate the screws to fall from the transfer tube into the guide tube 330 more smoothly, thereby improving the smoothness and stability of adding screws to the upper feeding tube 310.

[0036] When the feeding tube 310 delivers the screws, the screws can be directly output to the external mechanism under the action of gravity, or can be delivered to the external mechanism under negative pressure suction. In this embodiment, a blowing joint 340 is provided on the outer side of the bottom of the feeding tube 310. When in use, the blowing joint 340 can be connected to the air source of the external device. When the feeding tube 310 feeds the screws to the actuator of the external device, the blowing joint 340 can blow air into the feeding tube 310, and the airflow can assist the screws to be delivered downward, thereby improving the stability of the screw feeding.

[0037] In some embodiments, a first proximity switch 250 is provided on the outer side of the transfer pipe. The first proximity switch 250 can be used to detect whether the screws in the transfer pipe are completely discharged, which is beneficial to improving the accuracy of screw discharging.

[0038] Similarly, a second proximity switch 350 is provided on the outer side of the feeding pipe 310. Similarly, the second proximity switch 350 can be used to detect whether the screws in the feeding pipe 310 are completely discharged, which is beneficial to improving the accuracy of screw discharging. Naturally, openings are provided on the outer sides of the transfer pipe and the feeding pipe 310, so that the first proximity switch 250 and the second proximity switch 350 can detect the screws in the transfer pipe and the feeding pipe 310.

[0039] The above specifically describes the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. The screw transfer feeding mechanism is characterized by: include: A vibrating plate (100) having a discharge chute; The transfer unit (200) comprises a transfer pipe and a first blocking device, wherein the top end of the transfer pipe is connected to the discharge trough via a pipeline, the first blocking device has a first blocking end that can be inserted into or withdrawn from the transfer pipe, and at least two first blocking devices are arranged at intervals along the length direction of the transfer pipe; The feeding unit (300) comprises a feeding tube (310) and a second blocking device (320), wherein the feeding tube (310) is located below the transfer tube, and the second blocking device (320) has a second blocking end (321) that can extend into or out of the transfer tube, and at least two second blocking devices (320) are arranged at intervals along the length direction of the feeding tube (310).

2. The screw transfer feeding mechanism according to claim 1, characterized in that: The transfer pipe comprises a first tube body (211) and a first connecting block (212); three first tube bodies (211) are arranged at intervals in the up-down direction; two adjacent first tube bodies (211) are respectively connected with the first connecting block (212); through holes connected to the first tube bodies (211) are respectively arranged in the two first connecting blocks (212); avoidance holes connected to the through holes are respectively arranged on the outer sides of the two first connecting blocks (212); the top end of the first tube body (211) located at the top is connected to the discharge trough through a pipeline; the first blocking ends of the two first blocking devices can extend into or exit from the two through holes from the two avoidance holes.

3. The screw transfer feeding mechanism according to claim 2 is characterized in that: A connecting plate (220) is connected to one side of the first connecting block (212), and the first blocking device is connected to the connecting plate (220).

4. The screw transfer feeding mechanism according to claim 3 is characterized in that: The first blocking device comprises a first telescopic drive (230) and a top plate (240), wherein the first telescopic drive (230) is connected to the connecting plate (220), and the top plate (240) is connected to the first telescopic drive (230), and the top plate (240) is the first blocking end.

5. The screw transfer feeding mechanism according to claim 4, characterized in that: A guide opening (221) and a bayonet are sequentially arranged on one side of the top plate (240) close to the through hole in a direction away from the through hole. The top plate (240) is located on both sides of the guide opening (221) and gradually narrows in a direction close to the bayonet. The bayonet is in a semicircular shape.

6. The screw transfer feeding mechanism according to claim 1, characterized in that: A plurality of the transfer units (200) are arranged in a horizontal direction, and the number of the discharge troughs and the number of the loading units (300) are equal to the number of the transfer units (200).

7. The screw transfer feeding mechanism according to claim 1, characterized in that: The top end of the feeding tube (310) is connected to a guide tube (330), and the inner diameter of the guide tube (330) gradually decreases from top to bottom.

8. The screw transfer feeding mechanism according to claim 1, characterized in that: An air blowing joint (340) is provided on the outer side of the bottom of the feeding pipe (310).

9. The screw transfer feeding mechanism according to claim 1, characterized in that: A first proximity switch (250) is arranged on the outer side of the transfer tube.

10. The screw transfer feeding mechanism according to claim 1, characterized in that: A second proximity switch (350) is arranged on the outer side of the feeding tube (310).

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