Feeding device and screw tightening device

Abstract

The present disclosure relates to a feeding device and a screw-driving device. The feeding device comprises: a conveying pipe including an inlet, an outlet, and a chute communicating with the inlet and outlet, the chute being configured to accommodate a plurality of screws arranged along the extension direction of the chute; and a push rod mechanism comprising a push rod and a pressure head disposed at one end of the push rod, the pressure head extending into the chute to press against the screws within the chute. The present disclosure enables multiple screws to reach the outlet continuously and smoothly, preventing the screws from becoming stuck and improving screw-driving efficiency.

Description

Technical Field

[0001] The present disclosure relates to the technical field of equipment assembly, and in particular to a feeding device and a screw-tightening device. Background Art

[0002] At present, electric screw machines are widely used in industrial production and assembly as well as in daily life. Among them, most electric screw machines require manual replenishment of screws one by one.

[0003] To improve work efficiency, an electric screw machine that can automatically replenish screws has been designed. However, there are problems such as the screws easily getting stuck and not being able to reach the designated position in an orderly manner, resulting in low efficiency. Summary of the Invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a feeding device and a screw tightening device.

[0005] According to an embodiment of the present disclosure, a feeding device is provided for supplying screws to a screwdriver, the feeding device comprising: a conveying pipe, comprising an inlet, an outlet, and a chute communicating with the inlet and the outlet, the chute being used to accommodate a plurality of the screws arranged along an extension direction of the chute; a push rod mechanism, comprising a push rod and a pressure head arranged at one end of the push rod, the pressure head extending into the chute and abutting against the screws in the chute.

[0006] In some embodiments, it also includes: a storage box, which is arranged at the feed port and communicated with the feed port, and is used to store the screws; the push rod mechanism also includes a first elastic member arranged between the pressure head and the storage bin, and multiple screws are put into the feed port of the conveying pipe, so that the multiple screws slide into the slide groove in sequence.

[0007] In some embodiments, the second end of the push rod passes through the storage box.

[0008] In some embodiments, the bottom wall of the storage box is provided with a plurality of through holes, the shape of the through holes matches the shape of the screws; the inner wall of the feed port is provided with a guide groove connected to the plurality of through holes, and the guide groove is connected to the slide groove.

[0009] In some embodiments, it also includes: a vibration motor, which is arranged in the storage box, and the vibration motor vibrates to make the screw enter the feed port.

[0010] In some embodiments, the conveying pipe is provided with a limiting hole penetrating the chute at the discharge port, and the limiting hole has an upper opening and a lower opening, the upper opening is used for the screwdriver to pass through, and the lower opening is used for the screw to pass through.

[0011] In some embodiments, the opening and / or the lower opening is provided with a soft rubber pad having an opening.

[0012] According to an embodiment of the present disclosure, a screw-driving device is further provided, comprising: a screwdriver; and a feeding device as described in any of the above embodiments, wherein the feeding device is used to supply screws to the screwdriver.

[0013] In some embodiments, a fixing frame is further included, one end of which is fixedly connected to the screwdriver and the other end is connected to the delivery pipe, and the delivery pipe and the screwdriver are arranged in parallel.

[0014] In some embodiments, the invention further includes: a second elastic member, which is sleeved on the delivery pipe, and has one end connected to the fixing frame and the other end fixed to the delivery pipe.

[0015] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0016] By setting up a push rod mechanism, the pressure head presses the screw and applies pressure to the screw, so that multiple screws can reach the discharge port continuously and smoothly, avoiding the situation where the screws are stuck and improving the screw tightening efficiency.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] Figure 1 The figure is a schematic structural diagram of a screw-tightening device according to an exemplary embodiment.

[0020] Figure 2 is a schematic cross-sectional view of a feeding device according to an exemplary embodiment.

[0021] Figure 3 It is a partial cross-sectional schematic diagram of a feeding device according to an exemplary embodiment.

[0022] Figure 4 It is a partially enlarged schematic diagram of a feeding device according to an exemplary embodiment. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0024] Figure 1 The figure is a schematic structural diagram of a screw-tightening device according to an exemplary embodiment. Figure 2 is a schematic cross-sectional view of a feeding device according to an exemplary embodiment. Figure 3 It is a partial cross-sectional schematic diagram of a feeding device according to an exemplary embodiment. Figure 4 It is a partially enlarged schematic diagram of a feeding device according to an exemplary embodiment.

[0025] like Figure 1-Figure 4 As shown, the present disclosure provides a feeding device for supplying screws to a screwdriver 80. The feeding device of the embodiment of the present disclosure includes a delivery pipe 10 and a push rod mechanism 20.

[0026] The conveying pipe 10 includes an inlet 11, an outlet 12, and a chute 13 connecting the inlet 11 and the outlet 12. The conveying pipe 10 can include a straight pipe and a curved pipe. The straight pipe extends vertically and has the inlet 11 at its upper end. The curved pipe is connected to the lower end of the straight pipe and extends horizontally at its lower end, where the outlet 12 is located. The screw 200 enters the inlet 11, slides through the chute 13 to the outlet 12, and then is screwed into the workpiece to be secured at the outlet 12 using a screwdriver 80.

[0027] The feed port 11 may be a trumpet-shaped opening with an inner peripheral wall extending obliquely upward to facilitate feeding. The discharge port 12 has a defined hole that penetrates the chute. The defined hole has an upper opening and a lower opening that are connected to each other. The upper opening and the lower opening are both connected to the chute 13. The upper opening is used to pass the bit of the screwdriver 80, and the lower opening is used to pass the screw.

[0028] When the screw 200 passes from the feed port 11 to the discharge port 12, the nut of the screw 200 corresponds to the upper opening, and the screw shaft corresponds to the lower opening. The screwdriver 80 passes through the upper opening and contacts the nut of the screw 200 to tighten the screw, while the lower opening is used for the screw 200 to pass through to tighten the workpiece to be tightened.

[0029] For example, a soft rubber pad 70 with an opening can be provided at the upper opening and / or the lower opening. The soft rubber pad 70 limits the screw 200 at the discharge port 12, preventing the screw 200 from falling from the lower opening without the torque of the screwdriver, so that the screw 200 remains at the discharge port 12.

[0030] During use, the screwdriver 80 moves downward, and the blade of the screwdriver 80 passes through the opening of the upper soft rubber pad 70 and contacts the nut of the screw 200, causing the screw 200 to rotate. The downward force and torque of the screwdriver 80 cause the screw 200 to pass through the opening of the soft rubber pad 70 and lock the workpiece to be tightened. The soft rubber pad 70 can be a silicone pad. The soft rubber pad 70 can be provided with multiple tangent lines that communicate with the openings. The tangent lines cause the soft rubber pad 70 to deform and expand, facilitating the passage of the screw 200.

[0031] Soft rubber pads 70 are provided at the upper and lower openings of the discharge port 12 to limit the screw 200 so that the screw remains at the discharge port 12 position without affecting the passage of the screw when the screwdriver 80 is tightening the screw.

[0032] The chute 13 extends along the direction of the conveying pipe 10 and includes a straight section and an arcuate section. The straight section is connected to the inlet 11 and extends vertically. The arcuate section connects to the lower end of the straight section and extends horizontally at its distal end to connect to the outlet 12. The cross-section of the chute 13 matches the shape of the screw. At the point where the chute 13 connects to the inlet 11, only one screw can pass through. Multiple screws are arranged in sequence along the extension direction of the chute 13. For example, multiple screws are arranged in the straight section and the arcuate section of the chute 13.

[0033] The push rod mechanism 20 includes a push rod 21 and a pressing head 22 disposed at a first end of the push rod 21 . The pressing head 22 extends into the chute 13 and abuts against the screw in the chute 13 to press the screw 200 in the chute 13 .

[0034] The push rod 21 extends in the vertical direction, and a pressure head 22 is provided at the lower end of the push rod 21. The lower end of the push rod 21 extends from the feed port 11 of the conveying pipe 10 into the chute 13, so that the pressure head 22 of the push rod 21 presses the screw closest to the feed port 11 and applies downward pushing pressure to the screw. Through the transmission of force, the pushing pressure is finally transmitted to the screw closest to the discharge port 12.

[0035] During use, the outlet of the delivery pipe 10 is aligned with the location to be tightened, for example, against the workpiece to be tightened. Then, the blade of the screwdriver 80 is aligned with the screw at the outlet 12, driving the screw to tighten the workpiece. Then, due to the pressing force from the pressure head 22, the next screw slides smoothly along the chute 13 to the outlet 12, where it is tightened by the screwdriver 80. The next screw then slides to the outlet 12 and waits for the screwdriver 80 to tighten it. This ensures that multiple screws can reach the outlet 12 smoothly and continuously, preventing screws from getting stuck and improving screw tightening efficiency.

[0036] When it is necessary to add screws to the chute 13, the push rod 21 is pulled out to make the pressure head 22 separate from the chute 13, so that the screws at the feed port enter the chute 13 one by one. After the screws are added, the push rod 21 is inserted into the chute 13 again to make the pressure head press the screws.

[0037] In some embodiments, the feeding device of the disclosed embodiments further includes a storage box 30 for storing screws. The storage box 30 is disposed at the feed inlet 11 and communicates with the feed inlet 11. The ejector rod 21 passes through the storage box 30, and a first elastic member 23 is disposed between the pressing head 22 and the storage box 30. When the pressing head 22 presses against the screw 200, the first elastic member 23 is compressed, and the elastic force of the first elastic member 23 causes the pressing head 22 to press against the screw 200. The first elastic member 23 may be a spring.

[0038] The storage box 30 is arranged at the feed inlet 11 of the conveying pipeline and is connected with the feed inlet 11. The storage box 30 may include a top wall, a bottom wall and a peripheral side wall. A through hole communicating with the feed inlet 11 may be opened on the bottom wall, and the storage box 30 supplies the screw 200 to the feed inlet 11 through the through hole. The push rod 21 runs through the storage box 30, and the first elastic member 23 may be sleeved on the screw rod, and one end abuts against the pressure head 22, and the other end abuts against the bottom wall of the storage box 30, or the other end extends into the storage box 30 and abuts against the top wall of the storage box 30, that is, the first elastic member 23 may be located between the pressure head 22 and the bottom wall of the storage box 30, or the first elastic member 23 may be located between the pressure head 22 and the top wall of the storage box 30. The first elastic member 23 may, for example, be a spring. In the initial state, the spring is compressed and has elastic potential energy, which gives the pressing head 22 a downward elastic force, causing the pressing head 22 to press the screw 200, so that the screw automatically and continuously slides to the discharge port 12, automatically feeding the screwdriver.

[0039] During use, the discharge port of the conveying pipe 10 is aligned with the position to be tightened, for example, against the workpiece to be tightened. Then, the blade of the screwdriver 80 is aligned with the screw at the discharge port 12, driving the screw to lock the workpiece to be tightened. Next, the next screw is pressed against the discharge port 12 by the elastic force of the first elastic member 23, so that the pressure head 22 always presses against the screw, causing multiple screws to slide smoothly along the chute 13 to the discharge port 12 one by one. Then, the screw at the discharge port position is tightened by the screwdriver 80. This allows multiple screws to reach the discharge port 12 continuously and smoothly, avoiding the situation where the screws are stuck and improving the screw tightening efficiency. When it is necessary to add screws to the chute 13, the push rod 21 is pulled upward to disengage the push rod 22 from the chute 13, so that the screws in the storage box 30 enter the chute 13 one by one. After the screws are added, the push rod 21 is released, allowing the push rod 22 to extend into the chute 13 and press the screws.

[0040] The feeding device of the embodiment of the present disclosure automatically and continuously slides the screw to the discharge port 12 through the elastic force of the elastic member 23, thereby feeding the screwdriver 80 in an orderly manner and improving efficiency.

[0041] In one embodiment, the bottom wall of the storage box 30 is provided with a plurality of through holes 31, the shape of which matches the shape of the screws 200. A guide groove 14 communicating with the plurality of through holes 31 is provided on the inner wall of the feed port 11. The guide groove 14 is connected to the chute 13. The guide groove 14 is a contoured track that guides the screws 200. The bottom wall of the storage box 30 can be provided with a plurality of through holes 31 that match the shape and size of the screws 200 so that the screws 200 that conform to a specific direction can pass through the through holes 31 smoothly. That is, the screws 200 passing through the through holes 31 are oriented in the same direction to ensure smooth entry into the chute 13. For example, the through holes 31 include a first hole and a second hole communicating with the first hole. The shape and size of the first hole match the shape and size of the screw 200, and the shape and size of the second hole match the shape and size of the screw rod of the screw 200. A plurality of guide grooves 14 can be provided on the inner wall of the feed port 11. The plurality of guide grooves 14 are arranged circumferentially along the trumpet-shaped inner wall of the feed port 11. One end of the guide groove 14 is connected to the through hole 31, and the other end is connected to the chute 13 of the delivery pipe 10. The screws 200 in the storage box 30 that conform to a specific direction smoothly pass through the through hole 31 and fall into the guide grooves 14. The guide grooves 14 guide the screws 200 to maintain a consistent orientation, thereby allowing the screws 200 to flow accurately and smoothly into the chute 13.

[0042] When it is necessary to add screws to the chute 13, the push rod 21 is pulled upward to disengage the pressure head 22 from the chute 13. The screws in the storage box 30 fall from the through holes 31 to the guide groove 14, and enter the chute 13 one by one under the guidance of the guide groove 14. After the screws are added, the push rod 21 is released to allow the pressure head 22 to extend into the chute 13 to press the screws.

[0043] In one embodiment, the feeding device of the present disclosure further includes a vibration motor 24, which is disposed in the material storage box 30. The vibration motor 24 vibrates to allow the screws 200 to smoothly enter the feed port 11. The vibration motor 24 can be disposed in the material storage box 30. The vibration of the vibration motor 24 drives the material storage box 30 to vibrate, causing the multiple screws 200 in the material storage box 30 to shake, so that the screws 200 matching the through holes 31 can pass through smoothly, thereby preventing multiple screws 200 from blocking the through holes 31 and affecting the passing efficiency.

[0044] When it is necessary to add screws to the chute 13, the push rod 21 is pulled upward to disengage the pressure head 22 from the chute 13, and the vibration motor 24 is turned on. The screws in the storage box 30 shake, and the screws that meet the specific direction fall from the through hole 31 to the guide groove 14. Guided by the guide groove 14, they enter the chute 13 one by one. After the screws are added, the push rod 21 is released to allow the pressure head 22 to extend into the chute 13 to press the screws.

[0045] According to the present disclosure, there is also provided a screw-tightening device 100 , comprising a screwdriver 80 and a feeding device, wherein the feeding device is the feeding device of any of the above embodiments, and is used to supply screws to the screwdriver.

[0046] During use, the discharge port 12 of the conveying pipe 10 is aligned with the position to be tightened, for example, against the workpiece to be tightened. Then, the blade of the screwdriver 80 is aligned with the screw at the discharge port 12, driving the screw to tighten the workpiece to be tightened. Next, the next screw is pressed against the discharge port 12 by the elastic force of the first elastic member 23, so that the pressure head 22 always presses against the screw, causing multiple screws to slide smoothly along the chute 13 to the discharge port 12 one by one. Then, the screw at the discharge port position is tightened by the screwdriver 80. This allows multiple screws to reach the discharge port 12 continuously and smoothly, avoiding the situation where the screws are stuck and improving the screw tightening efficiency. When it is necessary to add screws to the chute 13, the push rod 21 is pulled upward to disengage the push rod 22 from the chute 13, so that the screws in the storage box 30 enter the chute 13 one by one. After the screws are added, the push rod 21 is released, allowing the push rod 22 to extend into the chute 13 and press the screws.

[0047] The screw tightening device 100 of the present disclosure, by configuring the feeding device of the embodiment of the present disclosure, can enable multiple screws to reach the discharge port 12 in an orderly and smooth manner, thereby avoiding the situation where the screws are stuck and improving the screw tightening efficiency.

[0048] In some embodiments, as Figure 1-Figure 4As shown, the screw-tightening device 100 also includes a fixed frame 50, one end of which is fixedly connected to the screwdriver 80 and the other end is movably connected to the conveying pipe 10. The fixed frame 50 is slidably mounted on the conveying pipe 10, and the conveying pipe 10 and the screwdriver are arranged side by side. The fixed frame 50 holds the conveying pipe 10 on the screwdriver 80. The fixed frame 50 can be generally annular in structure, with one end fixed to the outer shell of the screwdriver 80 and the other end mounted on the conveying pipe 10. Two or more fixed frames 50 can be provided, depending on the length and / or strength of the conveying pipe. The two or more fixed frames 50 are spaced apart in the vertical direction to more firmly hold the conveying pipe 10 on the screwdriver 80, making the two a unified whole and easy to carry. The conveying pipe 10 is made of a hard material and has a certain strength. During the screwdriver 80's movement relative to the conveying pipe 10 to tighten the screw, the direction of the screw 200's movement within the conveying pipe 10 and the direction in which the pressure rod presses into the screw 200 remain unchanged, ensuring that the screw 200 reaches the discharge port in the correct direction, with the nut facing the blade of the screwdriver 80.

[0049] In one embodiment, the screwdriving device 100 further includes a second elastic member 60, which is sleeved over the delivery pipe 10, with one end connected to the fixing bracket 50 and the other end fixed to the delivery pipe 10. The second elastic member 60 may be a compression spring. When the screwdriver 80 is used to tighten the screw, the second elastic member 60 is compressed, generating elastic potential energy. After the screwdriver 80 has completed tightening the screw, the restoring force of the second elastic member 60 returns the screwdriver 80 to its initial position.

[0050] During use, the discharge port of the conveying pipe 10 is aligned with the position to be tightened, for example, against the workpiece to be tightened. Then, the blade of the screwdriver 80 is aligned with the screw at the discharge port 12. The screwdriver 80 moves downward relative to the conveying pipe 10, the second elastic member 60 is compressed, and the blade of the screwdriver 80 passes through the opening of the upper soft rubber pad 70 and presses against the nut of the screw 200, driving the screw 200 to rotate. The screw 200 is subjected to the downward force and torque of the screwdriver 80 and passes through the opening of the soft rubber pad 70, locking the workpiece to be tightened. After the screwdriver 80 has completed tightening the screw, the restoring force of the second elastic member 60 returns the screwdriver 80 to its initial position. Then, the next screw is tightened by the pressure head 22 due to the elastic force of the first elastic member 23. The pressure head 22 always presses the screw, causing multiple screws to slide smoothly along the chute 13 to the discharge port 12 one by one. Then, the screw at the discharge port is tightened by the screwdriver 80. Thus, multiple screws can be continuously and smoothly delivered to the discharge port 12, thus preventing the screws from getting stuck and improving the screw tightening efficiency. When it is necessary to add screws to the chute 13, the push rod 21 is pulled upwards to disengage the pressing head 22 from the chute 13, so that the screws in the storage box 30 enter the chute 13 one by one. After the screws are added, the push rod 21 is released again, so that the pressing head 22 extends into the chute 13 to press the screws.

[0051] In summary, in a preferred embodiment of the present disclosure, when the screwing device 100 is used, the outlet 12 of the conveying pipe 10 is first placed on the workpiece to be tightened, so that the outlet 12 is aligned with the locking portion of the workpiece to be tightened. Then, the screwdriver 80 is turned on and moved downward relative to the conveying pipe 10. The blade of the screwdriver 80 passes through the upper opening of the outlet 12 and abuts against the nut of the screw 200, driving the screw to rotate downward, so that the screw rod of the screw 200 passes through the lower opening of the outlet 12 until the workpiece to be tightened is locked. During the downward movement of the screwdriver 80, the second elastic member 60 ( Figure 2 As shown) is compressed, the screwdriver 80 is returned to its initial position by the elastic restoring force of the second elastic member 60. Then, because the pressure head 22 is subjected to the elastic force of the first elastic member 23, the pressure head 22 always presses the screw, so that the next screw slides smoothly along the chute 13 to the discharge port 12. Then, the screwdriver 80 is started to rotate and move downward. The blade of the screwdriver 80 passes through the upper opening of the discharge port 12 and abuts against the nut of the screw 200 and drives the screw to rotate downward, so that the screw rod of the screw 200 passes through the lower opening of the discharge port 12 until the workpiece to be locked is locked, completing the locking of the second screw. Then, during the downward movement of the screwdriver 80, the second elastic member 60 ( Figure 2 The screwdriver 80 is compressed by the elastic restoring force of the second elastic member 60, and then returns to its initial position. Then, the next screw slides to the discharge port 12, and is driven by the screwdriver 80 to lock the screw in the workpiece to be locked. When the screws in the chute 13 need to be replenished, the push rod 21 is pulled upward to disengage the pressure head 22 from the chute 13, and the vibration motor 24 is turned on. The screws in the storage box 30 shake, and the screws that meet the specific direction fall from the through hole 31 to the guide groove 14. Guided by the guide groove 14, they enter the chute 13 one by one. After the screws are replenished, the push rod 21 is released again, and the pressure head 22 extends into the chute 13 to press the screws, thereby completing the replenishment of the screws.

[0052] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0053] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0054] It can be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0055] It is further understood that, unless otherwise specified, “connection” includes a direct connection where there are no other components between the two elements, and also includes an indirect connection where there are other elements between the two elements.

[0056] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0057] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0058] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A feeding device, characterized in that: Used to supply screws to a screwdriver, the feeding device comprises: A conveying pipeline, comprising an inlet, an outlet, and a chute communicating with the inlet and the outlet, wherein the chute is used to accommodate a plurality of screws, and the plurality of screws are arranged along an extension direction of the chute; A material storage box is provided at the material inlet and communicated with the material inlet, and is used to store the screws. The bottom wall of the material storage box is provided with one or more through holes, and the shape of the through holes is adapted to the shape of the screws; A push rod mechanism, comprising a push rod and a pressing head provided at a first end of the push rod, wherein the pressing head extends into the chute to press the screw in the chute; The push rod mechanism further includes a first elastic member disposed between the pressure head and the material storage box, wherein the pressure head presses the screw by the elastic force of the first elastic member, and the second end of the push rod passes through the material storage box, wherein the second end is opposite to the first end; The inner wall of the feed port is provided with a guide groove, one end of the guide groove is connected to the through hole, and the other end is connected to the slide groove, and the guide groove is a contoured track for guiding the screw; When the screws are added to the chute, the pressure head is disengaged from the chute by pulling up the push rod, and the screws in the storage box fall into the guide groove through the through hole and are guided into the chute.

2. The feeding device according to claim 1, characterized in that Also includes: A vibration motor is provided in the material storage box, and the vibration motor vibrates to make the screw slide into the sliding groove.

3. The feeding device according to claim 1, characterized in that The conveying pipe is provided with a limiting hole penetrating the chute at the discharge port, and the limiting hole has an upper opening and a lower opening, the upper opening is used for the screwdriver bit to pass through, and the lower opening is used for the screw to pass through.

4. The feeding device according to claim 3, characterized in that: The upper opening and / or the lower opening is provided with a soft rubber pad with openings.

5. A screw-tightening device, characterized in that: include: screwdriver; and The feeding device according to any one of claims 1 to 4, wherein the feeding device is used to supply screws to the screwdriver.

6. The screw-tightening device according to claim 5, characterized in that: Also includes: One end of the fixing frame is fixedly connected to the screwdriver, and the other end is slidably sleeved on the conveying pipe, and the conveying pipe and the screwdriver are arranged in parallel.

7. The screw-tightening device according to claim 6, characterized in that: Also includes: The second elastic member is sleeved on the conveying pipe, one end of the second elastic member is connected to the fixing frame, and the other end is fixedly connected to the conveying pipe.

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