Automatic nail feeding mechanism of a press riveter

Abstract

The present application relates to the technical field of press riveter, provide a kind of automatic nail feeding mechanism of press riveter, comprising: rack, the outer periphery of the rack is connected with multiple material receiving brackets by material conveying assembly, adjacent the material receiving bracket is connected by connecting chain, the outer periphery of the material receiving bracket is equipped with recess for accommodating rivet, the rivet is put by inlet located in the top side of the rack, the conveying process of multiple material receiving brackets driven by material conveying assembly is screened by screening assembly.Rivets with correct posture can be automatically identified and screened during the rivet conveying process. Rivets with incorrect posture are automatically returned to the inlet for re-feeding by the recycling assembly. This effectively solves the problem of inconsistent rivet orientation, ensuring uniform rivet orientation into the press riveter without manual intervention, greatly improving the accuracy and consistency of rivet feeding and enhancing product quality stability.

Description

Technical Field

[0001] This invention relates to the field of riveting machine technology, specifically to an automatic riveting feeding mechanism for a riveting machine. Background Technology

[0002] A press-fit riveting machine is a mechanical device used in metal processing, primarily for pressing fasteners such as rivets, nuts, and bolts into metal sheets or other metal structural components to achieve a fixed connection. This connection method is called press-fit riveting, and it is a cold riveting process that does not require heating, thus not affecting the properties of the metal material.

[0003] In existing riveting machines, manual screening and sorting of rivets is usually required during the feeding process to ensure that the rivet heads are aligned. This method is not only inefficient but also labor-intensive, making it difficult to meet the needs of modern production. Furthermore, screening and sorting rivets takes time, making it difficult to achieve continuous and stable feeding. Therefore, an automatic rivet feeding mechanism for riveting machines is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic rivet feeding mechanism for a riveting machine. This solves the problem that existing riveting machines typically require manual screening and sorting of rivets during the feeding process to ensure that the rivet heads are aligned. This method is not only inefficient but also labor-intensive, making it difficult to meet the needs of modern production. Furthermore, screening and sorting rivets takes a certain amount of time, making it difficult to achieve continuous and stable feeding.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic riveting feeding mechanism for a riveting machine includes: The frame has multiple material support brackets connected to its outer periphery via a material conveying assembly. Adjacent material support brackets are connected by a connecting chain. The outer periphery of each material support bracket has a groove for accommodating rivets. The rivets are fed through an inlet located on the top side of the frame. During the conveying process of the multiple material support brackets driven by the material conveying assembly, the rivets are screened by a screening assembly to ensure that the rivet heads of the fed rivets face the same direction. The screened rivets are returned to the inlet by a recycling assembly for refeeding. A support shell is located at the front end of the frame. A feeding cylinder is rotatably connected inside the support shell. An attitude adjustment frame is installed on the top side of the recycling guide groove to adjust the attitude of the rivets on the upper attitude adjustment frame, so that they change from a horizontal state to a vertical state. The vertical rivets are fed into the pre-drilled hole of the feeding cylinder through the feed port fixed on the top side of the support shell. The attitude adjustment frame is driven by a guide screw. After the attitude adjustment frame completes the attitude adjustment and feeding of a single rivet, it controls the rotation of the feeding cylinder by meshing the rack with the rotating component on the top side of the support shell, adjusting the idle pre-drilled hole to the feed port on the bottom side of the output port of the attitude adjustment frame. A fixed frame is fixedly connected to the outer wall of the feed inlet and is connected to a knocking head via a traction component. The traction component is synchronously driven by a guide screw to drive the knocking head to knock on the feed inlet, preventing rivets from getting stuck inside the feed inlet. The power for the material conveying assembly and the first guide screw is provided by a power assembly installed on one side of the frame, and the material conveying assembly and the first guide screw are driven separately by intermittent triggering.

[0006] Preferably, the material conveying assembly includes multiple synchronous rollers rotatably connected inside the frame, with synchronous belts sequentially sleeved on both ends of the outer walls of the multiple synchronous rollers, and multiple connecting rotating seats fixedly connected to the outer periphery of the synchronous belts, and both ends of the inner periphery of the material support bracket being rotatably connected to the connecting rotating seats.

[0007] Preferably, the screening assembly includes a positioning groove formed at one end of the frame and a deflector plate fixedly connected to the other end of the frame. The deflector plate is curved, and the inner diameter of the positioning groove matches the rivet head of the rivet.

[0008] Preferably, the recycling assembly includes a recycling guide trough located on the other side of the frame. One end of the recycling guide trough is provided with a material guiding ramp, and the other end of the recycling guide trough is equipped with a material guiding basket via a lifting electric cylinder. After the rivet falls into the recycling guide trough, it is guided to the material guiding basket. The inlet and the side of the material guiding basket are provided with a connecting groove.

[0009] Preferably, the attitude adjustment frame includes a frame body located on the top side of the support shell, a guide screw is rotatably connected to one end of the frame body, and a sliding head is horizontally slidable at the other end of the frame body via a spring. The outer wall of the guide screw is provided with a guide groove for a closed path. One side of the sliding head abuts against the guide groove through a protrusion. The bottom side of the sliding head is fixedly connected to the top side of the rack. A connecting rod is rotatably connected to the top side of the sliding head. An attitude adjustment basket is rotatably connected to the top side of the connecting rod. A positioning frame is fixedly connected to the top side of the feed inlet.

[0010] Preferably, the bottom end of the positioning frame is rotatably connected to the attitude adjustment basket, and positioning grooves are provided on the top side of the attitude adjustment basket and one side of the positioning frame.

[0011] Preferably, the rotating assembly includes an inner shaft rotatably connected to the middle of the top side of the support shell, an outer toothed ring rotatably connected to the outer circumference of the inner shaft, a pawl rotatably connected to the inner circumference of the bottom side of the inner shaft via a torsion spring, ratchet teeth being formed on the inner circumference of the outer toothed ring, the pawl engaging with the ratchet teeth, the middle of the bottom side of the inner shaft being fixedly connected to the middle of the top side of the feed cylinder, and the rack engaging with the outer circumference of the pawl.

[0012] Preferably, the traction assembly includes a second guide screw rotatably connected to the inner circumference of one end of the fixed frame. The outer wall of the second guide screw has a second guide groove with a closed path. A guide sliding sleeve is horizontally slidable on the outer circumference of one end of the fixed frame by a spring. The inner circumference of one end of the guide sliding sleeve abuts against the second guide groove by a protrusion. The other end of the guide sliding sleeve is fixedly connected to the striking head. One side of the first guide screw is fixedly connected to the second guide screw.

[0013] Preferably, the power assembly includes an incomplete gear rotatably connected to one side of the frame, the incomplete gear being driven by a motor, a driven gear one being fixedly connected to one side of one of the synchronous rollers, and a driven gear two being fixedly connected to the other side of the guide screw one, both of the driven gear one and the driven gear two being located on the outer periphery of the incomplete gear.

[0014] Preferably, it also includes a material storage port, which is fixedly connected to the bottom side of the support shell.

[0015] Working principle: When the riveting machine on which this mechanism is mounted starts working, the mechanism begins to feed the rivets. The incomplete gear driven by the motor rotates, and the incomplete gear will cyclically mesh with driven gear one and driven gear two. The operation cycle of the incomplete gear is divided into a first meshing cycle, a second meshing cycle, and a neutral period. The three movement cycles do not interfere with each other and will not operate simultaneously. The three movement cycles perform the following tasks respectively: In the first meshing cycle, the incomplete gear meshes with the driven gear one, and the synchronous roller connected to the driven gear one rotates, causing the synchronous roller to pull the synchronous belt sleeved on its outer wall to move, and driving the connecting rotary seat on the outer periphery of the synchronous belt to move synchronously. This, in turn, causes the displaced connecting rotary seat to move the connected material support bracket on the outer periphery of the frame, allowing the rivets stored in the inlet to fall onto the material support bracket below it through the outlet. The rivets are supported by grooves on the surface of the material support bracket, and they follow the movement of the bracket. The rivets falling onto the material support bracket are classified as either positively oriented rivets or negatively oriented rivets. Positively oriented rivets will embed their heads into the positioning grooves for positioning, while negatively oriented rivets cannot embed their heads into the positioning grooves due to the orientation of the rivet heads. During the displacement process, the negatively oriented rivets will... Upon contact with the paddle, the rivet head will deviate from the outward side of the paddle's curved structure, causing the rivet to gradually deviate from the material support bracket. Simultaneously, the rivet head will be suspended in the air. Under the influence of the rivet head's gravity, the rivet will detach from the material support bracket and fall into the recycling guide trough. It will then slide down the guide ramp of the recycling guide trough into the guide basket, where it will accumulate. Since the rivet detaches from the center of gravity of the rivet head, the rivet head will contact the recycling guide trough first, causing the orientation of the rivet head to reverse. After sliding down the guide ramp into the guide basket, it will roll continuously to maximize the maintenance of its posture, ensuring that the rivets in the guide basket are stored with the rivet head facing the rivet. After the guide basket is lifted by the lifting electric cylinder, the rivets will re-enter the interior of the feed inlet through the groove between the guide basket and the feed inlet, and be fed again, increasing the proportion of rivets with the rivet head facing the rivet. In the second meshing cycle, the rivet, displaced along the moving support bracket, disengages at the front of the frame and falls into the attitude adjustment basket. At this point, the incomplete gear meshes with the driven gear two, causing the driven gear two to rotate one revolution. This rotation of the driven gear two drives the connected guide screw one to rotate. The rotating guide screw one guides the protrusion of the sliding head through the guide groove one, causing the sliding head to move. Simultaneously, the displaced sliding head pulls the connecting rod on the top side to move, causing the angle of the connecting rod to change and pushing the attitude adjustment basket to rise. This allows the rivet that has fallen into the attitude adjustment basket to slide towards the positioning frame. When the attitude adjustment basket and the positioning frame merge, the rivet's attitude changes to a vertical position and falls into the bottom feed. The feed enters the preparatory hole on the bottom side of the feed inlet. During the rotation of the first guide screw, it will also drive the second guide screw connected to it, causing the second guide screw to rotate and guide the protrusion on the inner wall of the guide sliding sleeve through the second guide groove, causing the guide sliding sleeve to move. This causes the striking head connected to the guide sliding sleeve to move synchronously. When the rotation cycle of the first guide screw reaches the end, the sliding head is reset along the straight part on the first guide groove under the action of the compression spring. The guide sliding sleeve is reset synchronously along the straight part on the second guide groove under the action of the compression spring. The quickly reset guide sliding sleeve drives the striking head to impact the outer wall of the feed inlet once, preventing the rivets inside the feed inlet from getting stuck. During the idle period, the resetting sliding head synchronously pulls the rack connected to it to reset, meshing with the outer gear ring, causing the outer gear ring to reverse. When the rack previously followed the sliding head's displacement and meshed with the outer gear ring, it caused the outer gear ring to rotate clockwise. The ratchet teeth on the inner circumference of the clockwise rotating outer gear ring apply force to the pawl, causing the pawl to rotate and lie towards the recessed part, and reset under the action of the torsion spring. When the ratchet teeth on the inner circumference of the counterclockwise rotating outer gear ring apply force to the pawl, it causes the pawl to twist in the opposite direction to the recessed part, but it is hindered and cannot rotate. At this time, a further twisting force is applied to the inner shaft, causing the inner shaft to rotate in conjunction with the feed cylinder connected to it. The feed cylinder rotates in the support shell, causing the pre-drilled hole to shift. The empty pre-drilled hole is moved to the bottom side of the feed inlet, and the pre-drilled hole containing the rivet is moved to the top side of the storage port. The rivet falls into the interior of the storage port for material storage.

[0016] This invention provides an automatic riveting feeding mechanism for a riveting machine. It has the following advantages: 1. This invention can automatically identify and select rivets with the correct orientation during the rivet feeding process. For rivets whose orientation does not meet the requirements, the recycling component will automatically return them to the feed port for refeeding. This effectively solves the problem of inconsistent rivet orientation and ensures that the rivets entering the riveting machine have a uniform orientation without manual intervention. This greatly improves the accuracy and consistency of rivet feeding and enhances the stability of product quality.

[0017] 2. This invention uses a traction component to drive a striking head to periodically strike the feed inlet, effectively preventing rivets from getting stuck inside. This mechanical anti-jamming design can promptly dislodge rivets stuck in the feed inlet, avoiding the feeding interruption problems caused by rivet jamming in traditional feeding mechanisms. This ensures the continuity and stability of the feeding process, reduces the frequency of equipment downtime for maintenance, extends the service life of the equipment, and simultaneously reduces the labor intensity and maintenance costs for operators.

[0018] 3. This invention achieves staggered driving through intermittent triggering, ensuring that the three motion cycles of material feeding, posture adjustment, and anti-jamming are carried out without interference and in an orderly manner. This time-sharing driving method ensures coordinated cooperation among various functional modules, realizing continuous automatic feeding of rivets. The feeding rhythm is precisely matched with the working rhythm of the riveting machine, significantly improving the overall efficiency of the riveting operation. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the frame structure of the present invention; Figure 3 This is a schematic diagram of the structure of the synchronous roller of the present invention; Figure 4 This is a schematic diagram of the connection structure of the connecting chain of the present invention; Figure 5 This is a schematic diagram of the offset lever of the present invention; Figure 6 This is a schematic diagram showing the position of the posture adjustment basket of the present invention; Figure 7 This is a schematic diagram of the lifting of the guide frame of the present invention; Figure 8 This is a schematic diagram showing the position of the inner shaft of the present invention; Figure 9 This is a schematic diagram of the connecting structure of the linkage of the present invention; Figure 10 This is a schematic diagram of the structure of the guide screw of the present invention; Figure 11 This is a schematic diagram showing the location of the discharge port of the present invention; Figure 12 This is a schematic diagram of the feeding cylinder of the present invention; Figure 13 This is a schematic diagram of the inner shaft structure of the present invention; Figure 14 This is a schematic diagram of the connection structure of the feed inlet of the present invention; Figure 15 This is a schematic diagram of the connection structure of the fixing frame of the present invention; Figure 16 This is a schematic diagram of the second guide screw of the present invention.

[0020] The components are as follows: 1. Frame; 2. Support shell; 3. Recycling guide groove; 4. Feed inlet; 5. Material support bracket; 6. Connecting chain; 7. Synchronous roller; 8. Synchronous belt; 9. Connecting turntable; 10. Positioning slide; 11. Deviation lever; 12. Guide basket; 13. Lifting electric cylinder; 14. Attitude adjustment basket; 15. Frame body; 16. Sliding head; 17. Connecting rod; 18. Positioning frame; 19. Guide screw one; 20. Feeding cylinder; 21. Feed inlet; 22. Storage port; 23. Inner shaft; 24. External gear ring; 25. Pawl; 26. Rack; 27. Fixed frame; 28. Guide screw two; 29. ​​Guide sliding sleeve; 30. Striking head; 31. Motor; 32. Incomplete gear; 33. Driven gear one; 34. Driven gear two. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0022] This invention provides an automatic riveting feeding mechanism for a riveting machine, comprising: Please see the appendix Figure 1 - Appendix Figure 3 The frame 1 has multiple material support brackets 5 connected to its outer periphery via a material conveying assembly. Adjacent material support brackets 5 are connected by a connecting chain 6. The outer periphery of the material support brackets 5 is provided with grooves for accommodating rivets. The rivets are fed through the inlet 4 located on the top side of the frame 1. During the conveying process of the multiple material support brackets 5 driven by the material conveying assembly, the rivets are screened by a screening assembly to ensure that the rivet heads of the fed rivets face the same direction. The screened rivets are returned to the inlet 4 by the recycling assembly for refeeding. Specifically, this mechanism is installed in the riveting machine, and the inlet 4, which serves as the input port, is connected to the feed port of the riveting machine. All parameters are adapted to the riveting operation of the riveting machine to deliver rivets of the same specifications as the riveting machine and to perform the corresponding rivet feeding process.

[0023] Please see the appendix Figure 2 - Appendix Figure 4 The material conveying assembly includes multiple synchronous rollers 7 rotatably connected inside the frame 1. Synchronous belts 8 are sequentially sleeved on both ends of the outer wall of the multiple synchronous rollers 7. Multiple connecting rotating seats 9 are fixedly connected to the outer periphery of the synchronous belts 8. Both ends of the inner periphery of the material support bracket 5 are rotatably connected to the connecting rotating seats 9. Specifically, the synchronous roller 7 rotates, causing the synchronous belt 8 sleeved on its outer wall to move, and driving the connecting rotating seat 9 on the outer periphery of the synchronous belt 8 to move synchronously. This causes the moving connecting rotating seat 9 to drive the material support bracket 5 connected to it to move on the outer periphery of the frame 1, so that the rivets stored in the feed port 4 fall through the outlet onto the material support bracket 5 below it. The material is supported by the groove on the surface of the material support bracket 5, and the rivets follow the material support bracket 5 to move.

[0024] Please see the appendix Figure 5 - Appendix Figure 7 The screening component includes a positioning slide 10 at one end of the frame 1 and a deflection lever 11 fixedly connected to the other end of the frame 1. The deflection lever 11 is curved. The inner diameter of the positioning slide 10 matches the rivet head. The recycling component includes a recycling guide trough 3 on the other side of the frame 1. A guide ramp is provided at one end of the recycling guide trough 3. A guide basket 12 is installed at the other end of the recycling guide trough 3 through a lifting electric cylinder 13. After the rivet falls into the recycling guide trough 3, it is guided to the guide basket 12. A connecting groove is provided on the side of the feed inlet 4 and the side of the guide basket 12. Specifically, the rivets falling on the material support bracket 5 are classified into rivet heads facing forward and rivet heads facing backward. The rivet heads of the rivet heads facing forward will be embedded in the positioning groove 10 for positioning. Conversely, the rivet heads facing backward cannot be embedded in the positioning groove 10 due to the orientation of the rivet heads. During the displacement process, the rivet heads of the rivet heads facing backward will come into contact with the offset plate 11. The rivet heads will deviate along the outward side of the curved structure of the offset plate 11, causing the rivet to gradually deviate from the material support bracket 5. At the same time, the rivet heads are suspended in the air. Under the action of the rivet head's gravity, the rivet detaches from the material support bracket 5 and falls into the recycling guide trough 3, and slides into the guide basket 12 along the guide slope of the recycling guide trough 3. The rivets are piled up in the guide basket 12. Since the rivets detach from the center of gravity of the rivet head, the rivet head contacts the recycling guide groove 3 first before the rivet body. This causes the orientation of the rivet head to reverse. After sliding into the guide basket 12 along the guide slope, the rivets roll throughout the process to maximize the maintenance of their posture. This ensures that the rivets in the guide basket 12 are stored with the rivet head facing the rivet. After the guide basket 12 is lifted by the lifting electric cylinder 13, the rivets re-enter the interior of the feed inlet 4 through the through groove between the guide basket 12 and the feed inlet 4 for feeding again. This increases the proportion of rivets with the rivet head facing the rivet, thus adapting to the rivet head orientation problem when the riveting machine feeds rivets, without requiring too much time to adjust the rivet posture.

[0025] Please see the appendix Figure 1 Appendix Figure 6 and attached Figure 8Support shell 2 is located at the front end of frame 1. The support shell 2 is rotatably connected to the feed cylinder 20. The top side of the recovery guide trough 3 is equipped with an attitude adjustment frame to adjust the attitude of the rivets on the conveying attitude adjustment frame, so that they are changed from a horizontal state to a vertical state. The vertical rivets are fed into the preparatory hole of the feed cylinder 20 through the feed port 21 fixed on the top side of the support shell 2. The attitude adjustment frame is driven by the guide screw 19. After the attitude adjustment frame completes the attitude adjustment and feeding of a single rivet, it controls the rotation of the feed cylinder 20 by the meshing of the rack 26 with the rotating component on the top side of the support shell 2, and adjusts the idle preparatory hole to the feed port 21 on the bottom side of the output port of the attitude adjustment frame. Please see the appendix Figure 8 - Appendix Figure 10 The attitude adjustment frame includes a frame body 15 located on the top side of the support shell 2. A guide screw 19 is rotatably connected to one end of the frame body 15. A sliding head 16 is horizontally slidable at the other end of the frame body 15 via a spring. A guide groove with a closed path is opened on the outer wall of the guide screw 19. One side of the sliding head 16 abuts against the guide groove through a protrusion. The bottom side of the sliding head 16 is fixedly connected to the top side of the rack 26. A connecting rod 17 is rotatably connected to the top side of the sliding head 16. An attitude adjustment basket 14 is rotatably connected to the top side of the connecting rod 17. A positioning frame 18 is fixedly connected to the top side of the feed inlet 21. The bottom end of the positioning frame 18 is rotatably connected to the attitude adjustment basket 14. A positioning groove is opened on the top side of the attitude adjustment basket 14 and one side of the positioning frame 18. Specifically, the rivet that moves along the moving support bracket 5 disengages after reaching the front end of the frame 1 and falls into the attitude adjustment basket 14. At this time, the incomplete gear 32 meshes with the driven gear 34, causing the driven gear 34 to rotate once. The driven gear 34 rotates once and drives the guide screw 19 connected to it to rotate. The rotating guide screw 19 guides the sliding head 16 through the guide groove to move the sliding head 16. The moving sliding head 16 simultaneously pulls the connecting rod 17 on the top side to move, and the angle of the connecting rod 17 changes, pushing the attitude adjustment basket 14 to lift up. The rivet that falls into the attitude adjustment basket 14 slides towards the positioning frame 18. When the attitude adjustment basket 14 and the positioning frame 18 merge, the rivet's attitude changes to a vertical attitude and falls into the feed port 21 on the bottom side, and enters the preparation hole on the bottom side of the feed port 21.

[0026] Please see the appendix Figure 14 - Appendix Figure 16The fixed frame 27 is fixedly connected to the outer wall of the feed inlet 21 and is connected to the knocking head 30 through the traction component. The traction component is synchronously driven by the guide screw 19 to drive the knocking head 30 to knock the feed inlet 21, so as to prevent the rivet from getting stuck inside the feed inlet 21. The traction component includes a guide screw 28 rotatably connected to the inner circumference of one end of the fixed frame 27. The outer wall of the guide screw 28 is provided with a guide groove 2 with a closed path. A guide sliding sleeve 29 is horizontally slidable on the outer circumference of one end of the fixed frame 27 through a spring. The inner circumference of one end of the guide sliding sleeve 29 abuts against the guide groove 2 through a protrusion. The other end of the guide sliding sleeve 29 is fixedly connected to the knocking head 30. One side of the guide screw 19 is fixedly connected to the guide screw 28. Specifically, during the rotation of the first guide screw 19, it will also drive the second guide screw 28 connected to it, causing the second guide screw 28 to rotate and guide the protrusion on the inner wall of the guide sliding sleeve 29 through the second guide groove, causing the guide sliding sleeve 29 to displace, thereby causing the striking head 30 connected to the guide sliding sleeve 29 to displace synchronously. When the rotation cycle of the first guide screw 19 reaches the end, the sliding head 16 is reset along the straight part on the first guide groove under the action of the compression spring, and the guide sliding sleeve 29 is reset synchronously along the straight part on the second guide groove under the action of the compression spring. The rapidly reset guide sliding sleeve 29 drives the striking head 30 to impact the outer wall of the feed port 21, preventing the rivets entering the feed port 21 from getting stuck.

[0027] Please see the appendix Figure 8 Appendix Figure 12 and attached Figure 13 The rotating assembly includes an inner shaft 23 rotatably connected to the middle of the top side of the support shell 2, an outer toothed ring 24 rotatably connected to the outer periphery of the inner shaft 23, a pawl 25 rotatably connected to the inner periphery of the bottom side of the inner shaft 23 via a torsion spring, ratchet teeth being provided on the inner periphery of the outer toothed ring 24, the pawl 25 engaging with the ratchet teeth, the middle of the bottom side of the inner shaft 23 being fixedly connected to the middle of the top side of the feed cylinder 20, and a rack 26 engaging with the outer periphery of the pawl 25. Specifically, the resetting sliding head 16 synchronously pulls the connected rack 26 to reset, engaging with the outer gear ring 24, causing the outer gear ring 24 to reverse. Previously, when the rack 26 followed the sliding head 16's displacement, it engaged with the outer gear ring 24, causing the outer gear ring 24 to rotate clockwise. The ratchet teeth on the inner circumference of the clockwise rotating outer gear ring 24 apply force to the pawl 25, causing the pawl 25 to rotate, lie down towards the recessed portion, and reset under the action of the torsion spring. The ratchet teeth on the inner circumference of the counter-rotating outer gear ring 24 apply force to the pawl 25. When the ratchet 25 is twisted in the opposite direction to the recess, it is blocked and cannot rotate. At this time, a further twisting force is applied to the inner shaft 23, causing the inner shaft 23 to rotate in conjunction with the feed cylinder 20 connected to it. The feed cylinder 20 rotates in the support shell 2, causing the preparation hole to shift. The empty preparation hole is moved to the bottom side of the feed port 21, and the preparation hole containing the rivet is moved to the top side of the storage port 22. The rivet falls into the interior of the storage port 22 to store the material.

[0028] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 8 The power for the material conveying assembly and the guide screw 19 is provided by a power assembly installed on one side of the frame 1, and the material conveying assembly and the guide screw 19 are driven separately by intermittent triggering. The power assembly includes an incomplete gear 32 rotatably connected to one side of the frame 1. The incomplete gear 32 is driven by a motor 31. One side of a synchronous roller 7 is fixedly connected to a driven gear 33, and the other side of the guide screw 19 is fixedly connected to a driven gear 34. Both the driven gear 33 and the driven gear 34 are located on the outer periphery of the incomplete gear 32. Specifically, when the riveting machine on which the mechanism is mounted starts working, the mechanism begins to feed the rivets. The incomplete gear 32 driven by the motor 31 rotates. The incomplete gear 32 will cyclically mesh with the driven gear 1 33 and the driven gear 2 34. The operating cycle of the incomplete gear 32 is divided into a first meshing cycle, a second meshing cycle, and a neutral period. The three operating cycles do not interfere with each other and will not operate simultaneously.

[0029] Please see the appendix Figure 11 The material storage port 22 is connected to the rivet feeding port of the riveting machine on which the mechanism is mounted. The material storage port 22 is fixedly connected to the bottom side of the support shell 2. The material storage port 22 has a certain length so that enough rivets can be stored inside the material storage port 22 to accommodate the gap period generated during the rivet screening process and prevent the material feeding port of the riveting machine from being unable to feed normally.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic riveting feeding mechanism for a riveting machine, characterized in that, include: The frame (1) has multiple material support brackets (5) connected to its outer periphery via a material conveying assembly. Adjacent material support brackets (5) are connected by a connecting chain (6). The outer periphery of the material support brackets (5) is provided with a groove for accommodating rivets. The rivets are fed through the inlet (4) located on the top side of the frame (1). During the conveying process of the multiple material support brackets (5) driven by the material conveying assembly, the rivets are screened by a screening assembly to ensure that the rivet heads of the fed rivets face the same direction. The screened rivets are returned to the inlet (4) by the recycling assembly for refeeding. Support shell (2), the support shell (2) is located at the front end of the frame (1), the support shell (2) is rotatably connected to the inside of the support shell (2), the top side of the recycling guide groove (3) is equipped with a posture adjustment frame to adjust the posture of the rivets on the conveying posture adjustment frame, so that they are changed from a horizontal state to a vertical state, and the vertical rivets are fed into the preparatory hole of the feed cylinder (20) through the feed inlet (21) fixed on the top side of the support shell (2). The posture adjustment frame is driven by the guide screw (19). After the posture adjustment frame completes the posture adjustment of a single rivet, it controls the rotation of the feed cylinder (20) by meshing the rotating component on the top side of the support shell (2) with the rack (26), and adjusts the idle preparatory hole to the feed inlet (21) on the bottom side of the output port of the posture adjustment frame. A fixed frame (27) is fixedly connected to the outer wall of the feed inlet (21) and is connected to a knocking head (30) via a traction assembly. The traction assembly is synchronously driven by a guide screw (19) to drive the knocking head (30) to knock on the feed inlet (21) to prevent rivets from getting stuck inside the feed inlet (21). The power of the material conveying assembly and the guide screw (19) is provided by a power assembly installed on one side of the frame (1), and the material conveying assembly and the guide screw (19) are driven separately by intermittent triggering.

2. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The material conveying assembly includes multiple synchronous rollers (7) rotatably connected inside the frame (1). The outer ends of the multiple synchronous rollers (7) are sequentially fitted with synchronous belts (8). Multiple connecting rotating seats (9) are fixedly connected to the outer periphery of the synchronous belts (8). The inner ends of the material support bracket (5) are rotatably connected to the connecting rotating seats (9).

3. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The screening assembly includes a positioning groove (10) opened at one end of the frame (1) and a deflection plate (11) fixedly connected to the other end of the frame (1). The deflection plate (11) is curved in shape, and the inner diameter of the positioning groove (10) matches the rivet head of the rivet.

4. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The recycling assembly includes a recycling guide trough (3) located on the other side of the frame (1). One end of the recycling guide trough (3) is provided with a material guiding ramp. The other end of the recycling guide trough (3) is equipped with a material guiding basket (12) by a lifting electric cylinder (13). After the rivet falls into the recycling guide trough (3), it is guided to the material guiding basket (12). The inlet (4) and the side of the material guiding basket (12) are provided with a connecting groove.

5. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The attitude adjustment frame includes a frame (15) located on the top side of the support shell (2). A guide screw (19) is rotatably connected to one end of the frame (15). A sliding head (16) is horizontally slidable at the other end of the frame (15) by a spring. A guide groove with a closed path is opened on the outer wall of the guide screw (19). One side of the sliding head (16) abuts against the guide groove by a protrusion. The bottom side of the sliding head (16) is fixedly connected to the top side of the rack (26). A connecting rod (17) is rotatably connected to the top side of the sliding head (16). An attitude adjustment basket (14) is rotatably connected to the top side of the connecting rod (17). A positioning frame (18) is fixedly connected to the top side of the feed inlet (21).

6. The automatic riveting mechanism for a riveting machine according to claim 5, characterized in that, The bottom end of the positioning frame (18) is rotatably connected to the attitude adjustment basket (14), and the top side of the attitude adjustment basket (14) and one side of the positioning frame (18) are both provided with positioning grooves.

7. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The rotating assembly includes an inner shaft (23) rotatably connected to the middle of the top side of the support shell (2). An outer toothed ring (24) is rotatably connected to the outer circumference of the inner shaft (23). A pawl (25) is rotatably connected to the inner circumference of the bottom side of the inner shaft (23) via a torsion spring. A ratchet is provided on the inner circumference of the outer toothed ring (24). The pawl (25) meshes with the ratchet. The middle of the bottom side of the inner shaft (23) is fixedly connected to the middle of the top side of the feed cylinder (20). The rack (26) meshes with the outer circumference of the pawl (25).

8. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, The traction assembly includes a second guide screw (28) rotatably connected to the inner circumference of one end of the fixed frame (27). The outer wall of the second guide screw (28) is provided with a guide groove with a closed path. A guide sliding sleeve (29) is horizontally slidable on the outer circumference of one end of the fixed frame (27) by a spring. The inner circumference of one end of the guide sliding sleeve (29) abuts against the guide groove by a protrusion. The other end of the guide sliding sleeve (29) is fixedly connected to the striking head (30). One side of the first guide screw (19) is fixedly connected to the second guide screw (28).

9. The automatic riveting mechanism for a riveting machine according to claim 2, characterized in that, The power assembly includes an incomplete gear (32) rotatably connected to one side of the frame (1). The incomplete gear (32) is driven by a motor (31). One of the synchronous rollers (7) is fixedly connected to one side of a driven gear (33), and the other side of the guide screw (19) is fixedly connected to a driven gear (34). Both the driven gear (33) and the driven gear (34) are located on the outer periphery of the incomplete gear (32).

10. The automatic riveting feeding mechanism for a riveting machine according to claim 1, characterized in that, It also includes a material storage port (22), which is fixedly connected to the bottom side of the support shell (2).

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