Screw feeding mechanism

Abstract

A screw feeding mechanism comprises a material receiving assembly and a supporting seat, the material receiving assembly comprises a material receiving block and a second support, a material receiving channel is formed in the material receiving block, a second fixing plate is arranged on the supporting seat in a height-adjustable mode, the material receiving block is fixed to a second supporting plate, a second connecting hole is formed in the second fixing plate, and the second connecting hole is communicated with the material receiving channel. A third connecting hole is formed in the second supporting plate, a fourth connecting hole is formed in one of the second fixing plate and the second supporting plate, a first adjusting hole is formed in the other one of the second fixing plate and the second supporting plate, and the first adjusting hole is an arc-shaped long-strip hole. The curvature center of the arc is located in the center of the second connecting hole and the center of the third connecting hole, the second connecting hole is connected with the third connecting hole through one fixing piece, and the fourth connecting hole is connected with the first adjusting hole through the other fixing piece. According to the mechanism, the posture of the material receiving channel can be conveniently adjusted, alignment with the next working procedure is facilitated, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the tool technical field of tightening fastener, specifically relates to a screw feeding mechanism. BACKGROUND

[0002] Screw connection is a common connection mode in present industrial production. In order to improve production efficiency, automatic tightening device is generally used to complete screw connection between two parts. When using automatic tightening device, screw is first entered into the gun head of the tightening device from the material receiving channel, and then is tightened. At present, screw is vibrated by the material track, enters into the material receiving channel, and then is sent into the next process through the material receiving channel to complete feeding.

[0003] In the above feeding process, the end of the material receiving channel for screw ejection needs to be aligned with the next process. In the existing alignment process, the material receiving channel needs to be first disassembled, then continuously adjusted, and finally assembled after adjustment. The above-mentioned mode is relatively complex, and reduces work efficiency. UTILITARY MODEL

[0004] The utility model provides a screw feeding mechanism, which can conveniently adjust the posture of the material receiving channel, facilitate alignment with the next process, and improve work efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A screw feeding mechanism, comprising a material track, a material receiving assembly and a support seat, the material track is used for feeding screw, the screw entering the material track is fed to the material receiving assembly through the material track, the material receiving assembly comprises a material receiving block and a second support, a material receiving channel is formed in the material receiving block, the second support comprises a second fixed plate and a second support plate, the second fixed plate is adjustably arranged on the support seat, the material receiving block is fixed on the second support plate, a second connecting hole is formed on the second fixed plate, a third connecting hole corresponding to the second connecting hole is formed on the second support plate, a fourth connecting hole is formed on one of the second fixed plate and the second support plate, a first adjusting hole corresponding to the fourth connecting hole is formed on the other of the second fixed plate and the second support plate, the first adjusting hole is an arc-shaped long hole, and the center of curvature of the arc-shaped long hole is located at the center of the second connecting hole and the third connecting hole, one fixing member connects the second connecting hole and the third connecting hole, and the other fixing member connects the fourth connecting hole and the first adjusting hole.

[0007] Preferably, the third connecting hole is located on the second fixed plate, and the first adjusting hole is located on the second support plate.

[0008] Preferably, the plane in which the plate faces of the second fixing plate and the second supporting plate are located is not perpendicular to the extending direction of the material track.

[0009] Preferably, the second support further comprises a third fixing plate, the second fixing plate is connected with the third fixing plate, a second adjusting track is arranged on the supporting base, and a second fixing bolt passes through the third fixing plate and extends into the second adjusting track to fix the second fixing plate on the supporting base.

[0010] Preferably, the second support further comprises a fourth fixing plate and a connecting column, a plurality of positioning holes are arranged on the supporting base along the height direction of the supporting base, a third fixing bolt passes through the fourth fixing plate and extends into the positioning hole to fix the fourth fixing plate on the supporting base, and the connecting column passes through the fourth fixing plate and abuts against the lower edge of the third fixing plate.

[0011] Preferably, an adjusting nut for adjusting the distance between the third fixing plate and the fourth fixing plate is further arranged on the connecting column.

[0012] Preferably, the second support further comprises a third supporting plate, the third supporting plate is connected with the second supporting plate, and the plate faces of the two are parallel to each other, and the material receiving block is fixed on the third supporting plate.

[0013] Preferably, a material receiving pipe is fixed in the material receiving block, the material receiving channel is formed in the material receiving pipe, and air inlet holes for connecting the material receiving channel with the outside are formed on the material receiving pipe.

[0014] Preferably, an annular groove is formed on the outer side wall of the material receiving pipe, a plurality of air inlet holes are formed in the annular groove, and an air inlet joint is arranged on the material receiving block at a position corresponding to the annular groove.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In summary, in the application, through the arrangement of the material distribution assembly, the screw feeding mechanism can avoid multiple screws from entering the material receiving channel at the same time, and prevent the phenomenon of screw jamming in the gun head.

[0017] Further, through the arrangement of the related structures on the second fixing plate and the second supporting plate of the second support, the posture of the material receiving channel can be adjusted, the alignment with the next process is facilitated, and the work efficiency is improved; further, through the arrangement of the connecting structure between the third fixing plate and the supporting base, the height of the material receiving channel can be adjusted.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 The image shown is a first-view axial side structural schematic diagram of the screw feeding mechanism provided in an embodiment of this utility model.

[0020] Figure 2 As shown Figure 1 A second-view axial side structural diagram of the screw feeding mechanism.

[0021] Figure 3 As shown Figure 1 A third-view axial side structural diagram of the screw feeding mechanism.

[0022] Figure 4 As shown Figure 1 A schematic diagram of the axonal structure of the screw feeding mechanism after removing related auxiliary structures.

[0023] Figure 5 As shown Figure 4 A schematic diagram of the axial structure after removing the material distribution blocks from the relevant structure.

[0024] Figure 6 As shown Figure 1 A schematic diagram of the axonal structure of the split material block from a first-view perspective.

[0025] Figure 7 As shown Figure 6 A schematic diagram of the axonal structure of the split material block from a second perspective.

[0026] Figure 8 The diagram shown is a bottom view of the material distribution block structure.

[0027] Figure 9 The diagram shown is an axonal structural diagram of the support base and the receiving assembly after they are combined.

[0028] Figure 10 The diagram shows the axonal structure of the second and third support plates.

[0029] Figure 11 As shown Figure 9 A schematic diagram of the axonal structure of the central support base.

[0030] Figure 12 The diagram shown is a schematic diagram of the axial structure of the receiving block.

[0031] Figure 13 As shownFigure 12 A schematic diagram of the axial structure of the intermediate feed tube.

[0032] Reference numerals: 10, material rail; 11, guide rail; 12, gap; 13, pressure plate; 20, material distribution assembly; 21, material distribution block; 211, base; 212, cutting plate; 213, first channel; 214, second channel; 215, nail inlet; 216, guide slope; 22, power source; 231, connecting rod; 232, first connecting plate; 233, first connecting hole; 234, first connecting bolt; 30, receiving assembly; 31, receiving block; 311, receiving pipe; 3111, air inlet; 3112, annular groove; 312, air inlet connector; 32, second bracket; 321, second fixing plate; 322, second support plate; 3231, Second connecting hole; 3232, Third connecting hole; 3233, Fourth connecting hole; 3234, First adjusting hole; 3235, Second connecting bolt; 3236, Third connecting bolt; 324, Third fixing plate; 325, Fourth fixing plate; 326, Connecting column; 327, Adjusting nut; 328, Third support plate; 33, Material receiving channel; 40, Support base; 41, First adjusting track; 42, First fixing bolt; 43, Second adjusting track; 44, Second fixing bolt; 45, Positioning hole; 46, Third fixing bolt; 50, First bracket; 51, First fixing plate; 52, First support plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides a screw feeding mechanism that can easily adjust the posture of the feeding channel, making it easier to align with the next process and improving work efficiency.

[0035] like Figure 1 To the diagram Figure 6 As shown, the screw feeding mechanism provided in this embodiment of the present invention includes a feed rail 10, a feeding component 20, a receiving component 30, and a support base 40. The feed rail 10, feeding component 20, and receiving component 30 are all mounted on the support base 40. The feed rail 10 is used for feeding screws; screws entering the feed rail 10 are fed into the receiving component 30. After passing through the receiving component 30, the screws proceed to the next process. The feeding component 20 is located between the feed rail 10 and the receiving component 30, and it feeds the screws individually so that each screw enters the receiving component 30.

[0036] Please continue to refer to Figures 1 to 3 For ease of assembly, the support base 40 may include two separate support bases 40. The aforementioned material rail 10 may be mounted on one of the support bases 40, while the material distribution component 20 and the material receiving component 30 may be mounted on the other support base 40.

[0037] Understandably, the support base 40 can also be set to one or further subdivided into more units as needed.

[0038] Furthermore, the feed rail 10 includes two parallel guide rails 11, with a gap 12 formed between the two guide rails 11. After the screws enter the feed rail 10, multiple screws are arranged sequentially within the gap 12. A receiving channel 33 is formed on the receiving assembly 30. One end of the gap 12 is located corresponding to the receiving channel 33. Preferably, the gap 12 is located above the receiving channel 33 of the receiving assembly 30 (see...). Figure 5 In other words, after the screw falls out of the gap 12, it can fall into the receiving channel 33 by its own weight and then move to the next process.

[0039] The feed rail 10 is also equipped with a blowing structure and related auxiliary structures for sensors. These auxiliary structures are the same as those in the prior art and will not be described in detail here.

[0040] Please continue to refer to Figures 3 to 8 The material distribution assembly 20 includes a material distribution block 21 and a power source 22. The power source 22 is mounted on the support base 40, and the material distribution block 21 is located above the material rail 10, specifically above the gap 12, and is connected to the power source 22. Preferably, the material distribution block 21 is positioned above the receiving channel 33 of the receiving assembly 30.

[0041] The material distribution block 21 includes a base 211 and a cutting plate 212 connected to the base 211. A first channel 213 for screws to pass through is formed within the base 211. A second channel 214 for screws to pass through is formed between the cutting plate 212 and the base 211. An inlet 215 is formed between the end of the cutting plate 212 and the base 211. The second channel 214 connects the first channel 213 and the inlet 215. Compared to the inlet 215, the first channel 213 is located closer to the material rail 10, specifically at the end of the material rail 10 whose gap 12 faces the receiving assembly 30. After the screw enters the material distribution block 21 through the inlet 215, it passes through the second channel 214 into the first channel 213. A power source 22 drives the material distribution block 21 to move along a direction perpendicular to the extension of the gap 12 on the material rail 10, so that the material distribution block 21 forms a first position and a second position.

[0042] In the first position, the screw inlet 215 corresponds to the feed rail 10, specifically the position of the gap 12 in the feed rail 10. The screw can enter into the screw inlet 215 under the action of the feed rail 10. In the second position, the first channel 213 corresponds to the feed rail 10, specifically the position of the gap 12 in the feed rail 10. The cutting plate 212 blocks screws that have not entered the dividing block 21.

[0043] In this embodiment, when the feed rail 10 feeds screws, the multiple screws arranged in a row move together toward the receiving assembly 30. The power source 22 drives the dividing block 21 to reciprocate. When the dividing block 21 is in the first position, the screw inlet 215 corresponds to the gap 12 of the feed rail 10, and the screw can enter the dividing block 21 through the screw inlet 215. The power source 22 drives the dividing block 21 to move, and the end of the cutting plate 212 cuts the multiple screws arranged in a row. Since the screws are located on the feed rail 10, the screws that have entered the dividing block 21 will continue to move downstream along the feed rail 10; at the same time, since the dividing block 21 moves in a direction perpendicular to the extension of the feed rail 10, the screws will enter the first channel 213 from the screw inlet 215 through the second channel 214 relative to the dividing block 21. At this time, the second channel 214 corresponds to the material rail 10, and the dividing block 21 reaches the second position. The screw disengages from the material rail 10 through the second channel 214 and enters the receiving assembly 30. Simultaneously, the cutting plate 212 moves with the power source 22, and the outer side of the cutting plate 212 blocks screws that have not yet entered the dividing block 21. When a screw that has entered the dividing block 21 falls into the receiving channel 33, the power source 22 can drive the dividing block 21 to reset, that is, reset from the second position to the first position, allowing new screws to continue entering the dividing block 21 through the screw inlet 215. Therefore, through the aforementioned arrangement of the dividing block 21 and the power source 22, the dividing block 21 can, under the drive of the power source 22, divide multiple screws arranged in a row, preventing multiple screws from simultaneously entering the receiving channel 33 of the receiving assembly 30 and preventing screw jamming inside the nozzle.

[0044] Furthermore, in this embodiment, the outer wall of the cutting plate 212, that is, the side wall of the cutting plate 212 away from the base 211, extends in a straight line. In other words, the plane containing the outer wall of the cutting plate 212 is perpendicular to the extension direction of the material rail 10. When the material distribution block 21 reciprocates, the screws located outside the material distribution block 21 are not affected by the movement of the material distribution block 21.

[0045] On the side of the cutting plate 212 facing the base 211, the inner wall of the cutting plate 212 is inclined, that is, from the direction of the screw inlet 215 to the direction of the first channel 213, the thickness between the inner and outer walls of the dividing block 21 gradually increases. In other words, the cutting plate 212 can be wedge-shaped. The end of the cutting plate 212 facing the inlet has a pointed end to facilitate the cutting of screws by the cutting plate 212.

[0046] Understandably, this is to prevent the screws from wobbling within the dividing block 21. The side of the base 211 facing the inner wall of the cutting plate 212 is parallel to the inner wall of the cutting plate 212, that is, the width of the second channel 214 is equal.

[0047] Furthermore, the first channel 213 is formed by a downward recess of the base 211. That is, when the base 211 is positioned above the feed rail 10, a cover plate is formed on the first channel 213. The cover plate prevents the screw from moving up and down within the first channel 213.

[0048] Furthermore, a guide slope 216 is formed at the corresponding position of the end of the base 211 and the cutting plate 212 to guide the screw when the material distribution block 21 moves.

[0049] Please continue to refer to Figure 1 Above the feed rail 10, specifically above the gap 12 of the feed rail 10, a pressure plate 13 is provided. When multiple screws arranged in a row are placed inside the feed rail 10, the pressure plate 13 can prevent the screws from jumping up and down.

[0050] Furthermore, viewed from the side of the mechanism, the pressure plate 13 extends into the distribution block 21 and is positioned above the screw inlet 215 and the second channel 214. When the distribution block 21 reciprocates, the pressure plate 13 can limit the screws located in the screw inlet 215 and the second channel 214 to prevent them from jumping up and down.

[0051] Please continue to refer to Figure 4 and Figure 5 The power source 22 can be mounted on the support base 40 via the first bracket 50. The power source 22 is provided with a connecting rod 231, and a first connecting plate 232 is provided on the end of the connecting rod 231 away from the power source 22. The material distribution block 21 is fixed on the first connecting plate 232 so that the power source 22 can drive the material distribution block 21 to move.

[0052] For more details, please see Figure 5A first connecting hole 233 is formed on the first connecting plate 232. The first connecting hole 233 is a strip-shaped hole extending in the vertical direction. The first connecting bolt 234 passes through the first connecting hole 233 and is connected to the material distribution block 21, so that the material distribution block 21 is fixed on the first connecting plate 232. By setting the first connecting hole 233 as a strip-shaped hole extending in the vertical direction, the height of the material distribution block 21 when fixed on the first connecting plate 232 can be adjusted as needed, thereby adjusting the distance between the material distribution block 21 and the material rail 10.

[0053] Understandably, when adjusting the distance between the material distribution block 21 and the material rail 10, the aforementioned distance shall not exceed the height of the screw above the guide rail 11.

[0054] Please continue to refer to Figure 5 and Figure 9 To better adjust the distance between the material distribution block 21 and the material rail 10, the first bracket 50 includes a first fixing plate 51 and a first support plate 52. A first adjustment track 41 is formed on the support base 40. A first fixing bolt 42 passes through the first fixing plate 51 and extends into the first adjustment track 41 to fix the first bracket 50 to the support base 40. By adjusting the position of the first fixing bolt 42 within the first adjustment track 41, the fixing height of the first fixing plate 51 can be adjusted within a large range. The first support plate 52 is disposed on the end of the first fixing plate 51 away from the support base 40. The power source 22 is fixed to the first support plate 52.

[0055] Please continue to refer to Figures 1 to 5 ,as well as Figures 9 to 13 In this embodiment, the receiving assembly 30 includes a receiving block 31 and a second bracket 32. The aforementioned receiving channel 33 is formed within the receiving block 31, and the receiving block 31 is fixed to the support base 40 by the second bracket 32.

[0056] In this embodiment, the second bracket 32 ​​includes a second fixing plate 321 and a second support plate 322. The second fixing plate 321 is height-adjustably fixed to the support base 40, and the receiving block 31 is fixed to the second support plate 322. A second connecting hole 3231 is formed on the second fixing plate 321, and a third connecting hole 3232 corresponding to the second connecting hole 3231 is formed on the second support plate 322. A fourth connecting hole 3233 is formed on one of the second fixing plate 321 and the second support plate 322, and a first adjusting hole 3234 corresponding to the fourth connecting hole 3233 is formed on the other of the second fixing plate 321 and the second support plate 322. The first adjusting hole 3234 is an arc-shaped elongated hole, and the center of curvature of the arc is located at the center of the second connecting hole 3231 and the third connecting hole 3232. A fastener, such as a second connecting bolt 3235, connects the second connecting hole 3231 and the third connecting hole 3232. Another fastener, such as the third connecting bolt 3236, connects the fourth connecting hole 3233 to the first adjusting hole 3234.

[0057] In this embodiment, the fourth connecting hole 3233 is formed on the second fixing plate 321, and the first adjusting hole 3234 is formed on the second support plate 322.

[0058] When installing the receiving block 31, the second connecting bolt 3235 can be inserted into the second connecting hole 3231 and the third connecting hole 3232 to complete the pre-connection of the second fixing plate 321 and the second support plate 322 (this pre-connection means that although the second fixing plate 321 is connected to the second support plate 322, the two can rotate relative to each other). At this time, the fourth connecting hole 3233 can correspond to the first adjusting hole 3234. Rotate the second support plate 322 to adjust the second support plate 322 to a suitable angle. Since the curvature center of the first adjusting hole 3234 is located at the second connecting hole 3231 and the third connecting hole 3232, the first adjusting hole 3234 will always correspond to the fourth connecting hole 3233 when adjusting the second support plate 322. The first adjusting hole 3234 and the fourth connecting hole 3233 are fastened by the third connecting bolt 3236, and the second connecting hole 3231 and the third connecting hole 3232 are fastened by the second connecting bolt 3235, so as to complete the fastening of the second fixing plate 321 and the second support plate 322.

[0059] Since the receiving block 31 is set on the second support plate 322, the angle of the receiving channel 33 inside the receiving block 31 can be adjusted by the above adjustment. Combined with the adjustment of the height of the second fixing plate 321 on the support base 40, the posture of the receiving channel 33 can be adjusted so that the nail outlet of the receiving channel can be aligned with the next process.

[0060] Understandably, the plane on which the surfaces of the second fixing plate 321 and the second support plate 322 are located is not perpendicular to the extension direction of the material rail 10. Preferably, the plane on which the surfaces of the second fixing plate 321 and the second support plate 322 are located is parallel to the extension direction of the material rail 10.

[0061] Furthermore, in this embodiment, the second bracket 32 ​​also includes a third fixing plate 324, with the second fixing plate 321 connected to the third fixing plate 324. A second adjusting rail 43 is provided on the support base 40. A second fixing bolt 44 passes through the third fixing plate 324 and extends into the second adjusting rail 43, so that the third fixing plate 324 is fixed to the support base 40. The second adjusting rail 43 facilitates the adjustment of the height of the second bracket 32 ​​from the support base 40.

[0062] Further, please continue to refer to Figure 9 and Figure 11 In this embodiment, the second bracket 32 ​​further includes a fourth fixing plate 325, and a plurality of positioning holes 45 are provided on the support base 40 along the height direction of the support base 40. A third fixing bolt 46 passes through the fourth fixing plate 325 and extends into the positioning holes 45 to fix the fourth fixing plate 325 to the support base 40. The second bracket 32 ​​also includes a connecting column 326, with the fourth fixing plate 325 located below the third fixing plate 324, and the connecting column 326 passing through the fourth fixing plate 325 and abutting against the lower edge of the third fixing plate 324. An adjusting nut 327 is also provided on the connecting column 326 for adjusting the distance between the third fixing plate 324 and the fourth fixing plate 325.

[0063] The arrangement of the fourth fixing plate 325, multiple positioning holes 45, and connecting post 326 allows for greater adjustment of the height of the second bracket 32 ​​on the support base 40, while ensuring that the height of the third fixing plate 324 remains constant on the support base 40. Specifically, the third fixing plate 324 can be pre-tightened onto the support base 40; then, the third fixing bolt 46 is inserted into the positioning hole 45 at a specific height as needed. The connecting post 326 then connects the third fixing plate 324 to the fourth fixing plate 325. The adjusting nut 327 can be adjusted as needed to change the distance between the third fixing plate 324 and the fourth fixing plate 325. Finally, the third fixing plate 324 is secured to the support base 40 using the second fixing bolt 44.

[0064] Please continue to refer to Figure 10 The second support 32 also includes a third support plate 328, which is connected to the second support plate 322, and the planes on which their surfaces lie are perpendicular to each other. The aforementioned receiving block 31 is fixed to the third support plate 328.

[0065] Furthermore, a receiving tube 311 is fixed inside the receiving block 31, and the aforementioned receiving channel 33 is formed inside the receiving tube 311. An air inlet 3111 is formed on the receiving tube 311, connecting the receiving channel 33 to the outside. The air inlet 3111 allows airflow to be injected into the receiving channel 33 after the screw enters it. In this embodiment, by adjusting the angle between the second fixing plate 321 and the second support plate 322, the receiving channel 33 can extend in an inclined manner. Therefore, when the screw enters the receiving channel 33, friction may exist between the screw and the inner wall of the receiving channel 33. The air inlet 3111 allows the airflow to accelerate the movement of the screw within the receiving channel 33.

[0066] Furthermore, an annular groove 3112 is formed on the outer wall of the receiving pipe 311. Multiple air inlets 3111 are formed within this annular groove 3112. An air inlet connector 312 is provided on the receiving block 31 at a position corresponding to the annular groove 3112. This air inlet connector 312 communicates with the annular groove 3112. Airflow can uniformly enter the multiple air inlets 3111 from the annular groove 3112.

[0067] In summary, in this embodiment, by setting the material distribution component 20, the screw feeding mechanism can prevent multiple screws from entering the receiving channel 33 at the same time, thus preventing screw jamming inside the gun head.

[0068] Furthermore, by setting up relevant structures on the second fixing plate 321 and the second support plate 322 of the second bracket 32, the posture of the material channel 33 can be adjusted, which facilitates alignment with the next process and improves work efficiency; furthermore, by setting up a connection structure between the third fixing plate 324 and the support base 40, the height of the material channel 33 can be adjusted.

[0069] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A screw feed mechanism characterized by: The screw feeding device comprises a material track, a material receiving assembly and a supporting base. The material track is used for feeding screws. The screws entering the material track are fed into the material receiving assembly through the material track. The material receiving assembly comprises a material receiving block and a second support. The material receiving block has a material receiving channel. The second support comprises a second fixing plate and a second support plate. The second fixing plate is adjustably arranged on the supporting base. The material receiving block is fixed on the second support plate. The second fixing plate has a second connecting hole. The second support plate has a third connecting hole corresponding to the second connecting hole. One of the second fixing plate and the second support plate has a fourth connecting hole. The other of the second fixing plate and the second support plate has a first adjusting hole corresponding to the fourth connecting hole. The first adjusting hole is an arc-shaped long hole. The center of curvature of the arc-shaped long hole is located at the center of the second connecting hole and the third connecting hole. One fixing member connects the second connecting hole and the third connecting hole. Another fixing member connects the fourth connecting hole and the first adjusting hole.

2. The screw feed mechanism of claim 1, wherein: The third connecting hole is located on the second fixing plate. The first adjusting hole is located on the second support plate.

3. The screw feed mechanism of claim 1, wherein: The plane where the plate surface of the second fixing plate and the second support plate is located is not perpendicular to the extension direction of the material track.

4. The screw feed mechanism of claim 1, wherein: The second support further comprises a third fixing plate. The second fixing plate is connected with the third fixing plate. A second adjusting track is arranged on the supporting base. A third fixing bolt passes through the third fixing plate and extends into the second adjusting track to fix the second fixing plate on the supporting base.

5. The screw feed mechanism of claim 4, wherein: The second support further comprises a fourth fixing plate and a connecting column. A plurality of positioning holes are arranged on the supporting base along the height direction of the supporting base. A fourth fixing bolt passes through the fourth fixing plate and extends into the positioning hole to fix the fourth fixing plate on the supporting base. The connecting column passes through the fourth fixing plate and abuts against the lower edge of the third fixing plate.

6. The screw feed mechanism of claim 5, wherein: An adjusting nut for adjusting the distance between the third fixing plate and the fourth fixing plate is arranged on the connecting column.

7. The screw feed mechanism of claim 1, wherein: The second support further comprises a third support plate. The third support plate is connected with the second support plate. The plate surfaces of the second support plate and the third support plate are parallel to each other. The material receiving block is fixed on the third support plate.

8. The screw feed mechanism of claim 1, wherein: A material receiving pipe is fixed in the material receiving block. The material receiving channel is formed in the material receiving pipe. An air inlet hole is formed on the material receiving pipe to communicate the material receiving channel with the outside.

9. The screw feed mechanism of claim 8, wherein: An annular groove is formed on the outer side wall of the material receiving pipe. A plurality of air inlet holes are formed in the annular groove. An air inlet joint is arranged on the material receiving block at a position corresponding to the annular groove.

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