A nut riveting system and a nut riveting method

Abstract

The present invention discloses a nut riveting system and a riveting method, comprising a positioning frame for supporting a clutch plate, the clutch plate being provided with a plurality of mounting holes which are arranged at equal intervals and are used for riveting nuts, a pressing column for riveting nuts and a workbench supporting the positioning frame and the pressing column, a transposition and pressing structure for positioning the clutch plate being provided on the workbench, the transposition and pressing structure comprising a triangular plate which is arranged on the workbench and can move freely in a vertical direction, a transverse movement component for transferring a single nut toward a receiving component being provided on a base, a positioning component for limiting the position of the clutch plate being provided on the positioning frame, and the present invention can sequentially perform nut riveting operations on the mounting holes on the clutch plate through the transposition and pressing structure, thereby reducing the need for manual adjustment, improving the speed and accuracy of the overall operation, and being able to accurately position the clutch plate, ensuring the alignment of the nut with the mounting hole during the riveting process, thereby improving the accuracy and quality of the riveting.

Description

Technical Field

[0001] The invention relates to the technical field of riveting devices, and in particular to a nut riveting system and a riveting method. Background Art

[0002] In modern manufacturing, especially in the fields of automobile, aviation and electronic equipment manufacturing, nut riveting technology is a commonly used fixing and connection technology. Nut riveting technology provides a reliable fixing point for bolts or other fasteners by installing nuts on metal or other material plates. Traditional nut riveting technology mainly includes two methods: pull riveting and press riveting. Press riveting uses external pressure to squeeze the teeth of the nut into the periphery of the prefabricated hole of the plate to produce plastic deformation, thereby achieving a locking effect.

[0003] The existing Chinese patent with patent number CN117259658A discloses a riveting device for automobile clutch release bearing and its use method, including a bottom plate, a plurality of legs are evenly fixedly installed on the upper surface of the bottom plate, a support platform is fixedly installed on the top of the plurality of legs, a turntable is rotatably installed on the upper surface of the support platform, a positioning rod is fixedly installed through the center of the turntable, a locking nut is threadedly connected to the outer surface of the top of the positioning rod, a discharge hole is opened through the upper surface of the support platform, and a bracket is fixedly installed on the upper surface of the bottom plate near the discharge hole. When the telescopic end of the electric telescopic rod drives the connecting plate to move downward and reset, the positioning rod is driven to rotate a certain angle through the rotating mechanism, and the anchor inserted into the riveting hole of the automobile clutch release bearing is rotated to the right below the punch rivet head, so that the hydraulic telescopic rod drives the punch rivet head to rivet the anchor, and the automatic riveting operation of the automobile clutch release bearing is realized.

[0004] When the existing nut riveting device performs nut riveting operations on multiple groups of mounting holes on a car clutch plate, it may be necessary to manually adjust the positions of the mounting holes on the clutch plate to achieve the purpose of riveting different mounting holes, and when riveting multiple mounting holes, it is still necessary to complete the nut loading process in batches. Therefore, it is difficult to achieve a continuous riveting process for the car clutch plate, and it is difficult to improve the riveting efficiency of the part.

[0005] At the same time, when the riveting device in the above patent is in use, it uses a locking nut to fix the part to be processed, but it is difficult to locate the initial position of the part, that is, when placing the processed part, it is difficult to ensure the riveting accuracy between the nut and the mounting hole on the part. Therefore, a nut riveting system and a riveting method are proposed. Summary of the invention

[0006] The object of the present invention is to provide a nut riveting system and a riveting method, which have the advantages of being able to perform nut riveting operations on the mounting holes on the clutch plate in sequence and ensuring improved riveting accuracy and quality, thereby solving the problems of difficulty in achieving a continuous riveting process for the automobile clutch plate and difficulty in ensuring the riveting accuracy between the nut and the mounting hole on the part.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a nut riveting system, comprising a positioning frame for supporting a clutch plate, the clutch plate being provided with a plurality of equally spaced mounting holes for riveting nuts, a pressing column for riveting nuts and a workbench supporting the positioning frame and the pressing column, the workbench being provided with a transposition pressing structure for positioning the clutch plate;

[0008] The transposition and pressing structure comprises a triangular plate arranged on a workbench and freely movable in a vertical direction, a base fixedly connected to the workbench is arranged below the triangular plate, a pressing column is fixedly connected to the lower surface of the triangular plate, and a receiving assembly for supporting a nut is arranged at one end of the base facing the pressing column;

[0009] The base is provided with a transverse moving assembly for transferring a single nut toward the receiving assembly, and the base is provided with a positioning assembly for driving the positioning frame to rotate in a directional manner below the base, and the positioning frame is provided with a positioning assembly for limiting the position of the clutch plate;

[0010] The base is also provided with an adsorption component for driving the pressure column to negatively pressure the adsorption nut.

[0011] Preferably, the receiving assembly includes two groups of end swing blocks which are rotated on a fixed axis and arranged opposite to each other on a base, and the grooves opened at the positions of the two groups of end swing blocks corresponding to the pressure column positions jointly form a positioning groove for placing the nut, and the two groups of end swing blocks deflect synchronously away from or towards each other in the vertical direction with the pressure column as the center axis.

[0012] Preferably, the transverse movement assembly includes a transverse push plate that reciprocates in the horizontal direction, and a transverse slide groove for horizontal sliding of the transverse push plate is opened at the position of the base corresponding to the abutment groove, and the transverse slide groove is connected to the abutment groove. A hollow frame for accommodating stacked nuts is fixedly connected to the base, and the lower open end of the hollow frame corresponds to the transverse slide groove.

[0013] Preferably, a U-shaped downward extension plate is fixed by bolts on the lower surface of the triangular plate, the U-shaped downward extension plate includes an integrally formed left extension plate and a right extension plate, a guide column is fixedly connected to one side of the horizontal push plate facing the right extension plate, and a guide groove for the guide column to slide is provided on the right extension plate;

[0014] The guide groove includes a long V-groove portion, a short V-groove portion and a vertical groove portion which are integrally formed.

[0015] Preferably, the adsorption assembly comprises an air cylinder fixedly connected to the base, the left extension plate slides through the air cylinder and is fixedly connected to a piston plate, the outer peripheral surface of the piston plate is in sliding contact with the inner wall of the air cylinder, and a ventilation hose is provided on the air cylinder;

[0016] The pressure column includes an integrally formed air chamber and a clamping groove for accommodating a nut, the position of the clamping groove corresponds to the position of the abutment groove, and the pressure column is provided with a plurality of microporous channels for driving the air chamber and the clamping groove to communicate with each other;

[0017] The two ends of the ventilation hose are respectively fixed and penetrated on the air cylinder and the pressure column, and the air cylinder is in gas communication with the air chamber.

[0018] Preferably, the positioning assembly includes a driving gear that rotates freely in the horizontal direction, the driving gear meshes with a driven gear, the driven gear is coaxially fixed with a positioning disk, the positioning disk is provided with an inner ratchet disk, the inner ratchet disk is provided with a plurality of groups of equidistantly arranged ratchets, the ratchets rotate on a fixed axis on the inner ratchet disk, and the ratchets abut against the inner ratchet disk;

[0019] A connecting plate is fixedly connected to the inner ratchet disc, and one end of the connecting plate away from the inner ratchet disc is fixedly connected to the positioning frame, and the positioning frame is rotated on the workbench with a fixed axis.

[0020] Preferably, a turning column is fixedly connected to the right extension plate, and the end of the turning column away from the right extension plate includes an integrally formed ball head end. A positioning cylinder is fixedly rotated on the workbench, and a spiral groove is provided on the positioning cylinder for the ball head end to slide. The driving gear is fixedly sleeved on the outer circumferential surface of the positioning cylinder.

[0021] Preferably, the positioning assembly includes multiple groups of positioning pins arranged on the positioning frame and corresponding to the mounting holes. The positioning pins slide through the positioning frame and are fixedly connected to an annular plate. A yield spring is sleeved on the outer circumference of the positioning pins. Both ends of the yield spring are respectively fixedly connected to the annular plate and the positioning frame.

[0022] Preferably, a triangular support is provided on one side of the annular plate facing the base, a limiting arc plate is fixedly connected to the triangular support, and an arc groove for sliding of the annular plate is provided on the limiting arc plate;

[0023] The end swing block is coaxially fixed with a cam, and a vertical column is provided below the cam. An L-shaped support rod is fixedly connected to the lower surface of the base. The vertical column slides through the L-shaped support rod and is fixedly connected to the triangular support seat. An outer ring body is fixedly connected to the vertical column, and a return spring is sleeved on the outer peripheral surface of the vertical column. Two ends of the return spring are respectively fixedly connected to the outer ring body and the L-shaped support rod, and the top of the vertical column is in sliding contact with the outer peripheral surface of the cam.

[0024] A riveting method for a nut riveting system, comprising the following steps:

[0025] S1. Parts positioning: Place the clutch plate to be riveted and the nut used for riveting at the specified position, and limit the position of the clutch plate through the positioning component;

[0026] S2, nut movement: the lateral movement component sends a single nut to the specified position, and during the downward movement of the triangular plate, the adsorption component drives the nut at this position and the pressure column to move synchronously toward the corresponding mounting hole on the clutch plate, and at the same time, the receiving component gives way to avoid motion interference with the downward pressure process of the pressure column;

[0027] S3, riveting and fixing: the nut moves toward the mounting hole on the clutch plate, the positioning assembly retracts and provides a riveting downward position for the pressure column, and the pressure column continues to squeeze the nut and rivet the nut onto the clutch plate;

[0028] S4, reset and rotate: After the nut riveting operation on a single group of mounting holes is completed, the pressure column returns to its initial height. During this process, the positioning component drives the positioning frame to rotate horizontally so that the mounting holes that have not been riveted correspond to the positions of the pressure columns. At the same time, the receiving component is reset to support the nuts of the next group that need to be riveted;

[0029] S5, riveting in sequence: repeat steps S1-S4 until the nut riveting process is completed for multiple groups of mounting holes on the clutch plate, and then remove the clutch plate from the positioning frame.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention can accurately position the clutch plate by providing a positioning component, ensure the alignment of the nut and the mounting hole during the riveting process, prevent the nut and the mounting hole from offsetting, thereby improving the accuracy and quality of riveting.

[0032] 2. The present invention provides a transposition and pressing structure, which can perform nut riveting operations on the mounting holes on the clutch plate in sequence, thereby reducing the need for manual adjustment, improving the speed and accuracy of the overall operation, reducing direct contact between the operator and mechanical parts, and reducing safety risks during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the location of the clutch plate of the present invention;

[0035] Figure 3 This is a schematic diagram of the components where the transverse push plate of the present invention is located;

[0036] Figure 4 This is a schematic diagram of the components where the end swing block of the present invention is located;

[0037] Figure 5This is a schematic diagram of the components where the position adjustment cylinder of the present invention is located;

[0038] Figure 6 It is a cross-sectional schematic diagram of the location of the positioning frame of the present invention;

[0039] Figure 7 This is a schematic diagram of the component where the pawl of the present invention is located;

[0040] Figure 8 For the present invention Figure 1 Enlarged view of point A in the middle;

[0041] Fig. 9 For the present invention Figure 1 Enlarged view of point B in the middle;

[0042] Fig.10 For the present invention Figure 4 Enlarged view of point C in the middle;

[0043] Fig.11 For the present invention Figure 6 Enlarged view of point D in the middle;

[0044] Fig.12 The figure is a schematic flow chart of the riveting method of the nut riveting system of the present invention.

[0045] In the figure: 1, base; 101, horizontal slide; 2, triangular plate; 3, pressure column; 301, clamping groove; 302, microporous channel; 303, air chamber; 4, positioning frame; 5, clutch plate; 6, hollow frame; 7, end swing block; 8, stop groove; 9, horizontal push plate; 10, U-shaped downward extension plate; 11, guide column; 12, guide groove; 121, long V groove; 122, short V groove; 123, vertical groove; 13, piston plate; 14, Air cylinder; 15. Ventilation hose; 16. Turn column; 17. Adjustment cylinder; 171. Spiral groove; 18. Driving gear; 19. Driven gear; 20. Same position disk; 21. Ratchet; 22. Inner ratchet disk; 23. Connecting plate; 24. Positioning pin; 25. Yield spring; 26. Annular plate; 27. Limiting arc plate; 28. Triangular support seat; 29. ​​Vertical column; 30. L-shaped support rod; 31. Outer ring body; 32. Return spring; 33. Cam. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figures 1 to 12The present invention provides a technical solution: a nut riveting system, comprising a positioning frame 4 for supporting a clutch plate 5, the clutch plate 5 is provided with a plurality of equidistantly arranged mounting holes for riveting nuts, a pressing column 3 for riveting nuts and a workbench supporting the positioning frame 4 and the pressing column 3, the workbench being provided with a transposition pressing structure for positioning the clutch plate 5;

[0048] The transposition and pressing structure comprises a triangular plate 2 which is arranged on a workbench and can move freely in the vertical direction, a base 1 which is fixedly connected to the workbench is arranged below the triangular plate 2, a pressing column 3 is fixedly connected to the lower surface of the triangular plate 2, and a receiving assembly for supporting a nut is arranged at one end of the base 1 which faces the pressing column 3;

[0049] The base 1 is provided with a lateral movement component for transferring a single nut toward the receiving component, and the base 1 is provided with a positioning component for driving the positioning frame 4 to rotate in a certain direction. The positioning frame 4 is provided with a positioning component for limiting the position of the clutch plate 5.

[0050] The base 1 is also provided with an adsorption component for driving the pressure column 3 to negatively pressure the nut.

[0051] like Figure 1 and Figure 2 As shown, when the clutch plate 5 in the automobile part is riveted, the clutch plate 5 is placed in the positioning frame 4, and the initial position of the clutch plate 5 is determined by the positioning component, that is, the positions of the mounting hole in the clutch plate 5 and the pressure column 3 are ensured to correspond, and the nut required for riveting is placed at the specified position.

[0052] At the same time, the triangular plate 2 is driven to move freely in the vertical direction by a cylinder fixed on the workbench, wherein the output end of the cylinder is fixedly connected to the triangular plate 2, and a pressure column 3 is fixedly arranged on the lower surface of the triangular plate 2. Therefore, the pressure column 3 can be driven by the cylinder to move downward. When the pressure column 3 initially moves downward and does not reach the horizontal position of the base 1, the transverse movement assembly pushes the single nut to move horizontally and moves the thread to the specified position on the receiving assembly.

[0053] As the pressure column 3 continues to descend, the pressure column 3 contacts the nut, and driven by the adsorption component, the nut is adsorbed on the pressure column 3 and can move downward with the pressure column 3. As the pressure column 3 moves downward, the receiving component makes way for the position of the pressure column 3 along the movement trajectory to prevent interference with the downward pressing process of the pressure column 3.

[0054] The pressure column 3 drives the nut to move continuously downward until the nut contacts and squeezes the clutch plate 5, so that the nut is riveted onto the clutch plate 5. At the same time, after a single riveting operation is completed, the pressure column 3 moves upward, and when the horizontal height of its lower end is greater than the horizontal height of the base 1, the receiving assembly is reset to achieve the purpose of supporting the nut used in subsequent riveting operations. In addition, during the rising process of the pressure column 3, the positioning assembly can drive the positioning frame 4 to rotate a certain angle in the horizontal direction, thereby changing the horizontal position of the clutch plate 5, and then driving the mounting hole of the un-riveted nut to correspond to the pressure column 3.

[0055] In one of the more preferred embodiments, the receiving assembly includes two groups of end swing blocks 7 which are relatively arranged and rotate on a fixed axis on the base 1. The grooves opened at the positions of the two groups of end swing blocks 7 corresponding to the pressure column 3 together form a stop groove 8 for placing the nut. The two groups of end swing blocks 7 are synchronously deflected away from or towards each other in the vertical direction with the pressure column 3 as the center axis.

[0056] like Figure 1 , Figure 3 and Figure 4 As shown, when the pressure column 3 initially moves downward, the transverse movement assembly drives the single nut to move horizontally to the position of the abutment groove 8 jointly opened on the two groups of end pendulum blocks 7. As the pressure column 3 continues to descend, the nut on the abutment groove 8 contacts the pressure column 3 and is adsorbed on the pressure column 3 under the action of the negative pressure suction force of the adsorption assembly. At the same time, as the pressure column 3 continues to move downward, the pressure column 3 squeezes one side of the contact end of the two groups of end pendulum blocks 7, thereby driving the two groups of end pendulum blocks 7 to deflect downward synchronously, thereby providing space for the subsequent downward movement process of the pressure column 3.

[0057] At the same time, after a single riveting operation is completed, the pressure column 3 gradually moves upward, and when the pressure column 3 is no longer in contact with the end swing block 7, since a No. 1 torsion spring is provided between the end swing block 7 and the base 1 to drive the end swing block 7 to return to its initial position, the torsion spring is an existing device and a technical means well known to technical personnel in this field, so it is not shown in the figure. Under the action of the No. 1 torsion spring, the end swing block 7 returns to its initial position, thereby ensuring that the nuts in the next riveting operation can still be pushed to the position of the positioning groove 8.

[0058] Based on the implementation example of the receiving component, the transverse movement component includes a transverse push plate 9 that reciprocates in the horizontal direction, and a transverse slide groove 101 for horizontal sliding of the transverse push plate 9 is opened at the position corresponding to the stop groove 8 on the base 1, and the transverse slide groove 101 is connected with the stop groove 8. A hollow frame 6 for accommodating stacked nuts is fixedly connected to the base 1, and the lower open end of the hollow frame 6 corresponds to the transverse slide groove 101.

[0059] A U-shaped downward extending plate 10 is bolted to the lower surface of the triangular plate 2, and the U-shaped downward extending plate 10 includes an integrally formed left extending plate and a right extending plate. A guide column 11 is fixedly connected to the side of the transverse push plate 9 facing the right extending plate, and a guide groove 12 for the guide column 11 to slide is provided on the right extending plate, and the guide groove 12 includes an integrally formed long V-groove portion 121, a short V-groove portion 122 and a vertical groove portion 123.

[0060] like Figure 1 , Figure 2 and Fig. 9 As shown, when the triangle plate 2 moves downward, it can drive the U-shaped downward extending plate 10 fixed thereunder to move downward synchronously, wherein the guide column 11 fixedly arranged on the transverse push plate 9 is slidably connected to the right extending plate in the U-shaped downward extending plate 10 through the guide groove 12. Therefore, when the triangle plate 2 drives the pressure column 3 to move downward initially, its guide column 11 slides on the long V-groove portion 121, thereby driving the transverse push plate 9 to push a group of nuts on the transverse slide groove 101 to move toward the end swing block 7 until the end screw is in the position of the stop groove 8.

[0061] At the same time, as the guide column 11 continues to move downward, the guide column 11 slides on the short V-groove portion 122, thereby driving the horizontal push plate 9 to gradually move away from the position of the end swing block 7. However, at this time, the horizontal push plate 9 can also block the lower opening of the hollow frame 6. Therefore, no nut will fall from the hollow frame 6 during this process. During the subsequent descent of the guide column 11, the guide column 11 slides on the vertical groove portion 123. Therefore, the horizontal position of the horizontal push plate 9 will no longer change.

[0062] At the same time, after a single riveting operation is completed, as the pressure column 3 gradually rises, the guide column 11 slides on the vertical groove 123, the short V-groove 122 and the long V-groove 121 in sequence. Therefore, when the horizontal height of the pressure column 3 is greater than the horizontal height of the end swing block 7, the transverse push plate 9 first moves horizontally toward the end swing block 7, and then moves away from the end swing block 7 until it returns to its initial position.

[0063] It should be noted that when the transverse push plate 9 is in the initial position, it will no longer block the lower opening of the hollow frame 6. Moreover, since the height of the transverse slide groove 101 is slightly greater than the horizontal height of a single nut, the stacked nuts in the hollow frame 6 move downward under the action of gravity, and cause the single nut to fall into the transverse slide groove 101, thereby preparing for the subsequent riveting process. In the subsequent riveting process, the horizontal movement of the transverse push plate 9 can push the nuts that have fallen onto the transverse slide groove 101 to the position of the positioning groove 8.

[0064] On the basis of the embodiment of the transverse movement assembly, the adsorption assembly includes an air cylinder 14 fixedly connected to the base 1, the left extension plate slides through the air cylinder 14 and is fixedly connected to a piston plate 13, the outer peripheral surface of the piston plate 13 is in sliding contact with the inner wall of the air cylinder 14, and a ventilation hose 15 is provided on the air cylinder 14;

[0065] The pressure column 3 includes an integrally formed air chamber 303 and a clamping groove 301 for accommodating a nut. The position of the clamping groove 301 corresponds to the position of the abutment groove 8. The pressure column 3 is provided with a plurality of microporous channels 302 for driving the air chamber 303 and the clamping groove 301 to communicate with each other.

[0066] The two ends of the ventilation hose 15 are fixedly connected to the air cylinder 14 and the pressure column 3 respectively, and the air cylinder 14 is in gas communication with the air chamber 303 .

[0067] like Figure 1 , Figure 2 and Figure 4 As shown, when the triangular plate 2 is driven by the cylinder to drive the pressure column 3 and the U-shaped downward extending plate 10 to move downward synchronously, the piston plate 13 can be driven to move in the air cylinder 14 through the U-shaped downward extending plate 10, wherein, in the process of the pressure column 3 moving downward, a negative pressure is generated in the air chamber 303 that is in communication with the air of the air cylinder 14, and the negative pressure absorbs the external gas into the air cylinder 14 through the microporous channel 302.

[0068] At the same time, as the pressure column 3 continues to move downward, the nut on the positioning groove 8 gradually enters the clamping groove 301 and is adsorbed by the negative pressure in the air chamber 303 to ensure that the thread of the pressure column 3 can move downward synchronously with it during the subsequent downward movement.

[0069] On the basis of the embodiment of the adsorption component, the positioning component includes a driving gear 18 that rotates freely in the horizontal direction, the driving gear 18 is meshed with a driven gear 19, the driven gear 19 is coaxially fixed with a positioning disk 20, the positioning disk 20 is provided with an inner ratchet disk 22, the inner ratchet disk 22 is provided with a plurality of groups of equidistantly arranged ratchet pawls 21, the ratchet pawls 21 are fixedly rotated on the inner ratchet disk 22, and the ratchet pawls 21 are in contact with the inner ratchet disk 22;

[0070] The inner ratchet disc 22 is fixedly connected with a connecting plate 23 , and one end of the connecting plate 23 away from the inner ratchet disc 22 is fixedly connected to the positioning frame 4 , and the positioning frame 4 rotates on a fixed axis on the workbench.

[0071] The right extension plate is fixedly connected with a turning column 16, and the end of the turning column 16 away from the right extension plate includes an integrally formed ball head end. A positioning cylinder 17 is fixedly rotated on the workbench, and a spiral groove 171 is provided on the positioning cylinder 17 for the ball head end to slide. The driving gear 18 is fixedly sleeved on the outer circumferential surface of the positioning cylinder 17.

[0072] like Figure 1, Figure 6 and Figure 7 As shown, when the triangle plate 2 drives the U-shaped downward extending plate 10 to move in the vertical direction, it can synchronously drive the crook 16 to perform lifting movement, wherein the ball head end of the crook 16 is slidably connected to the positioning cylinder 17 through the spiral groove 171, thereby driving the positioning cylinder 17 and the driving gear 18 mounted thereon to rotate horizontally. At the same time, the driving gear 18 is meshed with the driven gear 19. Therefore, when the triangle plate 2 performs lifting movement in the vertical direction, it can drive the driven gear 19 to reciprocate in the horizontal direction.

[0073] At the same time, when the triangle plate 2 moves downward, the driven gear 19 rotates forward in the horizontal direction and drives the coaxial isotropic disk 20 to rotate forward in the horizontal direction synchronously, wherein a plurality of groups of pawls 21 are provided around the isotropic disk 20. At this time, the pawls 21 do not engage with the inner ratchet disk 22. The pawls 21 will only jump horizontally repeatedly due to the rotation of the isotropic disk 20 under the action of the No. 2 torsion spring provided thereon. Therefore, in the process of the triangle plate 2 driving the pressure column 3 to move downward, the inner ratchet disk 22 cannot be driven to rotate, and the positioning frame 4 will not be driven to rotate. The purpose is to avoid the rotation of the positioning frame 4 to change the position of the clutch plate 5 during the downward pressing process of the pressure column 3, so as to ensure that the mounting hole on the clutch plate 5 can always correspond to the position of the pressure column 3.

[0074] At the same time, when the triangle plate 2 moves upward, the driven gear 19 drives the isotropic disk 20 to reverse horizontally. At this time, the pawl 21 is engaged with the inner ratchet disk 22. With the horizontal rotation of the isotropic disk 20, the inner ratchet disk 22 and the positioning frame 4 can be driven to rotate a certain angle in the horizontal direction, so that the mounting holes on the clutch plate 5 that have not been riveted correspond to the pressure column 3. Among them, a No. 2 torsion spring is provided between the pawl 21 and the isotropic disk 20 to drive the pawl 21 to deflect to the initial position. The torsion spring is an existing device and a technical means well known to those skilled in the art, so it is not shown in the figure. At the same time, the main purpose of the workbench described in this article is to support and protect the components thereon. Considering that the design and structure of the workbench belong to conventional technology in this field, and its specific shape and size will vary according to actual application requirements, it is not shown in the figure.

[0075] Based on the embodiment of the positioning assembly, the positioning assembly includes multiple groups of positioning pins 24 arranged on the positioning frame 4 and corresponding to the mounting holes. The positioning pins 24 slide through the positioning frame 4 and are fixedly connected to an annular plate 26. The outer peripheral surface of the positioning pins 24 is sleeved with a yield spring 25, and the two ends of the yield spring 25 are respectively fixedly connected to the annular plate 26 and the positioning frame 4.

[0076] The annular plate 26 is provided with a triangular support seat 28 on one side facing the base 1, and a limiting arc plate 27 is fixedly connected to the triangular support seat 28, and an arc groove for the annular plate 26 to slide is provided on the limiting arc plate 27;

[0077] The end swing block 7 is coaxially fixed with a cam 33, and a vertical column 29 is provided below the cam 33. An L-shaped support rod 30 is fixedly connected to the lower surface of the base 1. The vertical column 29 slides through the L-shaped support rod 30 and is fixedly connected to the triangular support seat 28. An outer ring body 31 is fixedly connected to the vertical column 29. A return spring 32 is sleeved on the outer peripheral surface of the vertical column 29. Both ends of the return spring 32 are respectively fixedly connected to the outer ring body 31 and the L-shaped support rod 30. The top of the vertical column 29 is in sliding contact with the outer peripheral surface of the cam 33.

[0078] like Figure 1 , Figure 6 , Figure 8 and Fig.11 As shown, when the clutch plate 5 is placed on the positioning frame 4, the positions of the multiple groups of mounting holes and the positioning pins 24 thereon correspond to each other, even if the positioning pins 24 are inserted into the mounting holes, thereby positioning the initial position of the clutch plate 5 by the multiple groups of positioning pins 24 to ensure that the positions of the multiple groups of mounting holes can correspond to the positions of the positioning pins 24.

[0079] At the same time, when the pressure column 3 moves downward, it can squeeze the end pendulum block 7 and drive it to deflect, thereby driving the cam 33 coaxial with the end pendulum block 7 to rotate, wherein the cam 33 is always in contact with the top of the vertical column 29 under the action of the return spring 32. Therefore, when the cam 33 rotates, it can squeeze the vertical column 29 and drive the vertical column 29 to move downward, wherein the vertical column 29 is fixedly connected to the limiting arc plate 27 through the triangular support seat 28, and the annular plate 26 fixedly connected to the bottom of the locating pin 24 is slidably connected to the limiting arc plate 27 through an arc groove. Therefore, when the pressure column 3 squeezes the end pendulum block 7, it can drive the locating pin 24 to move downward through the annular plate 26, thereby avoiding the locating pin 24 from being exposed too much outside the positioning frame 4, and the purpose is to ensure that the nut is directly squeezed and contacted with the surface of the clutch plate 5.

[0080] It should be noted that when the pressure column 3 gradually rises but its horizontal height is still lower than the horizontal height of the end swing block 7, at this time, the positioning pin 24 is still in a retracted state, wherein the pressure column 3 is in the process of rising, and the positioning frame 4 rotates horizontally. At this time, the existence of the positioning pin 24 can still locate the position of the clutch plate 5 to avoid relative movement between the clutch plate 5 and the positioning frame 4.

[0081] Among them, by setting the limiting arc plate 27, the position of the annular plate 26 can be limited, wherein the curvature of the limiting arc plate 27 is greater than 180 degrees, thereby preventing the annular plate 26 from detaching from the limiting arc plate 27. At the same time, the arc groove provided on the limiting arc plate 27 can avoid motion interference with the horizontal rotation of the annular plate 26, and can ensure that the horizontal height of the annular plate 26 can change synchronously with it.

[0082] A nut riveting system and a nut riveting method, comprising the following steps:

[0083] S1. Parts positioning: Place the clutch plate 5 to be riveted and the nuts used for riveting at the specified position, and limit the position of the clutch plate 5 through the positioning assembly, so that the multiple groups of mounting holes in the clutch plate 5 are respectively inserted into the corresponding positioning pins 24, and the nuts required to be used are stacked in the hollow frame 6.

[0084] S2. Nut movement: The transverse movement component sends a single nut to the specified position, and during the downward movement of the triangular plate 2, the adsorption component drives the nut at this position to move synchronously with the pressure column 3 toward the corresponding mounting hole on the clutch plate 5. At the same time, the receiving component gives way to avoid movement interference in the downward pressing process of the pressure column 3, and the nut is pushed to the position of the positioning groove 8 through the transverse push plate 9. Under the action of the adsorption component, the nut is adsorbed on the pressure column 3, so that the nut and the pressure column 3 move downward synchronously.

[0085] S3, riveting and fixing: the nut moves toward the mounting hole on the clutch plate 5, the positioning assembly retracts and provides a riveting downward position for the pressure column 3, and the pressure column 3 continues to squeeze the nut and rivet the nut onto the clutch plate 5.

[0086] S4, reset and rotate: after the nut riveting operation on a single group of mounting holes is completed, the pressing column 3 returns to its initial height, and during this process, the positioning assembly drives the positioning frame 4 to rotate horizontally so that the unriveted mounting holes correspond to the positions of the pressing column 3, and at the same time, the receiving assembly is reset to support the nuts of the next group that need to be riveted.

[0087] S5, riveting in sequence: repeat steps S1-S4 until the nut riveting process is completed for multiple groups of mounting holes on the clutch plate 5, and then remove the clutch plate 5 from the positioning frame 4.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nut riveting system, comprising a positioning frame (4) for supporting a clutch plate (5), the clutch plate (5) being provided with a plurality of equally spaced mounting holes for riveting nuts, a pressing column (3) for riveting nuts, and a workbench supporting the positioning frame (4) and the pressing column (3), characterized in that: The workbench is provided with a displacement and pressing structure for positioning the clutch plate (5); The transposition and pressing structure comprises a triangular plate (2) arranged on a workbench and freely movable in a vertical direction, a base (1) fixedly connected to the workbench is arranged below the triangular plate (2), a pressing column (3) is fixedly connected to the lower surface of the triangular plate (2), and a receiving assembly for supporting a nut is arranged at one end of the base (1) facing the pressing column (3); The base (1) is provided with a transverse movement component for transferring a single nut toward the receiving component, the base (1) is provided with a positioning component for driving the positioning frame (4) to rotate in a certain direction, and the positioning frame (4) is provided with a positioning component for limiting the position of the clutch plate (5); The base (1) is also provided with an adsorption component for driving the pressure column (3) to negatively pressure the adsorption nut; The receiving assembly comprises two sets of end swing blocks (7) which are arranged opposite to each other and are rotatably fixed on a base (1); the grooves of the two sets of end swing blocks (7) corresponding to the positions of the pressure columns (3) jointly form a stop groove (8) for placing a nut; the two sets of end swing blocks (7) are synchronously deflected in opposite directions or in opposite directions in a vertical direction with the pressure column (3) as the central axis; The transverse movement assembly comprises a transverse push plate (9) that reciprocates in the horizontal direction, a transverse slide groove (101) for the transverse push plate (9) to slide horizontally is provided at a position corresponding to the stop groove (8) on the base (1), the transverse slide groove (101) is connected to the stop groove (8), a hollow frame (6) for accommodating stacked nuts is fixedly connected to the base (1), and an open end below the hollow frame (6) corresponds to the transverse slide groove (101); A U-shaped downward extending plate (10) is bolted to the lower surface of the triangular plate (2), the U-shaped downward extending plate (10) comprising an integrally formed left extending plate and a right extending plate, a guide column (11) is fixedly connected to the side of the transverse push plate (9) facing the right extending plate, and a guide groove (12) for the guide column (11) to slide is provided on the right extending plate; The guide groove (12) comprises an integrally formed long V-groove portion (121), a short V-groove portion (122) and a vertical groove portion (123); The adsorption assembly comprises an air cylinder (14) fixedly connected to the base (1), a left extension plate slidingly penetrating the air cylinder (14) and fixedly connected to a piston plate (13), an outer peripheral surface of the piston plate (13) slidingly contacting an inner wall of the air cylinder (14), and a ventilation hose (15) being provided on the air cylinder (14); The pressure column (3) comprises an integrally formed air chamber (303) and a clamping groove (301) for accommodating a nut, the position of the clamping groove (301) corresponds to the position of the abutment groove (8), and the pressure column (3) is provided with a plurality of microporous channels (302) for driving the air chamber (303) and the clamping groove (301) to communicate with each other by gas. The two ends of the ventilation hose (15) are respectively fixed and penetrated on the gas cylinder (14) and the pressure column (3), and the gas cylinder (14) is in gas communication with the gas chamber (303); The positioning assembly comprises a driving gear (18) that rotates freely in the horizontal direction, the driving gear (18) meshing with a driven gear (19), the driven gear (19) being coaxially fixed with a positioning disk (20), the positioning disk (20) being provided with an inner ratchet disk (22), the inner ratchet disk (22) being provided with a plurality of groups of equidistantly arranged ratchet pawls (21), the ratchet pawls (21) rotating on the inner ratchet disk (22) with a fixed axis, and the ratchet pawls (21) abutting against the inner ratchet disk (22); A connecting plate (23) is fixedly connected to the inner ratchet disc (22); one end of the connecting plate (23) away from the inner ratchet disc (22) is fixedly connected to a positioning frame (4); and the positioning frame (4) rotates on a fixed axis on a workbench.

2. A nut riveting system according to claim 1, characterized in that: A turning column (16) is fixedly connected to the right extension plate, and one end of the turning column (16) away from the right extension plate includes an integrally formed ball head end, and a positioning cylinder (17) is arranged on the workbench to rotate on a fixed axis.

3. A nut riveting system according to claim 2, characterized in that: The positioning cylinder (17) is provided with a spiral groove (171) for the ball head end to slide, and the driving gear (18) is fixedly sleeved on the outer peripheral surface of the positioning cylinder (17).

4. A nut riveting system according to claim 3, characterized in that: The positioning assembly comprises a plurality of groups of positioning pins (24) which are arranged on the positioning frame (4) and correspond to the mounting holes. The positioning pins (24) slide through the positioning frame (4) and are fixedly connected to the annular plate (26).

5. A nut riveting system according to claim 4, characterized in that: The outer circumferential surface of the positioning pin (24) is sleeved with a clearance spring (25), and the two ends of the clearance spring (25) are respectively fixedly connected to the annular plate (26) and the positioning frame (4).

6. A nut riveting system according to claim 5, characterized in that: A triangular support seat (28) is provided on one side of the annular plate (26) facing the base (1), a limiting arc plate (27) is fixedly connected to the triangular support seat (28), and an arc groove for the annular plate (26) to slide is provided on the limiting arc plate (27); The end swing block (7) is coaxially fixed with a cam (33), a vertical column (29) is provided below the cam (33), an L-shaped support rod (30) is fixedly connected to the lower surface of the base (1), the vertical column (29) slides through the L-shaped support rod (30) and is fixedly connected to the triangular support seat (28), an outer ring body (31) is fixedly connected to the vertical column (29), a return spring (32) is sleeved on the outer peripheral surface of the vertical column (29), two ends of the return spring (32) are respectively fixedly connected to the outer ring body (31) and the L-shaped support rod (30), and the top end of the vertical column (29) is in sliding contact with the outer peripheral surface of the cam (33).

7. A nut riveting method, applied to a nut riveting system as described in any one of claims 1 to 6, comprising the following steps: S1. Parts positioning: placing the clutch plate (5) to be riveted and the nut used for riveting at a specified position, and limiting the position of the clutch plate (5) by a positioning component; S2, nut movement: the transverse movement component sends a single nut to a specified position, and during the downward movement of the triangular plate (2), the adsorption component drives the nut at that position and the pressure column (3) to move synchronously toward the corresponding mounting hole on the clutch plate (5), while the receiving component gives way to avoid motion interference with the downward pressure process of the pressure column (3); S3, riveting and fixing: the nut moves toward the mounting hole on the clutch plate (5), the positioning assembly retracts and provides a riveting downward position for the pressure column (3), and the pressure column (3) continues to squeeze the nut and rivet the nut onto the clutch plate (5); S4, reset and rotate: after the nut riveting operation on a single group of mounting holes is completed, the pressing column (3) returns to its initial height, and during this process, the positioning assembly drives the positioning frame (4) to rotate horizontally so that the mounting holes that have not been riveted correspond to the positions of the pressing column (3), and at the same time, the receiving assembly is reset to support the nuts of the next group that need to be riveted; S5, riveting in sequence: repeating steps S1 to S4 until the multiple groups of mounting holes on the clutch plate (5) have completed the nut riveting process, and then removing the clutch plate (5) from the positioning frame (4).

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