Positioning and clamping device for pressing rivet nut machining

Abstract

The invention relates to the technical field of pressing rivet nut machining, in particular to a positioning and clamping device for pressing rivet nut machining, which comprises a machining table provided with a mounting cavity, and further comprises a limiting frame internally provided with a plurality of outer clamping plates; a plurality of inner clamping plates; and a switching drive assembly. According to the positioning and clamping device, the switching driving assembly is arranged to switch and drive the outer clamping plate and the inner clamping plate, so that switching and clamping of the outer surface and the inner side wall of the pressing rivet nut body are automatically switched, and the positioning and clamping device has two clamping modes of clamping the outer surface and the inner side wall of the pressing rivet nut body; and the clamping modes are automatically switched according to the machining requirements of the outer surface and the inner side wall of the pressing rivet nut body.

Description

Technical Field

[0001] The invention relates to the field of self-clinching nut processing, and in particular to a positioning clamping device for self-clinching nut processing. Background Art

[0002] The self-clinching nut is also called a rivet nut or a self-tightening nut. It is a nut used on thin plates or sheet metals. It is round in shape and has embossed teeth and a guide groove at one end. The principle is to press the embossed teeth into the preset hole of the sheet metal. Generally speaking, the aperture of the preset hole is slightly smaller than the embossed teeth of the self-clinching nut. The pressure causes the teeth of the self-clinching nut to squeeze into the plate to cause plastic deformation around the preset hole. The deformed object is squeezed into the guide groove, thereby producing a locking effect. The self-clinching nut needs to be fixed during the processing process. In the prior art, the self-clinching nut is fixed by a clamping device.

[0003] However, the conventional clamping device has a single clamping method for the rivet nut. When the outer surface and the inner wall are processed separately, the rivet nut needs to be disassembled and the clamping method needs to be changed. It is not convenient to automatically switch the clamping method to switch the clamping method for the inner wall and the outer surface of the rivet nut. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the conventional clamping device in the prior art that the clamping method for the rivet nut is single, and when the outer surface and the inner wall are processed separately, the rivet nut needs to be disassembled and the clamping method needs to be changed, which makes it inconvenient to automatically switch the clamping method for the inner wall and the outer surface of the rivet nut. A positioning clamping device for processing rivet nuts is proposed to solve the problems.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a positioning and clamping device for processing self-clamping nuts, including a processing table, the processing table having an installation cavity, and also including: a limit frame, a plurality of outer clamping plates are arranged in the limit frame, and a first elastic support is arranged between the plurality of outer clamping plates and the limit frame; a plurality of inner clamping plates, and a height adjustment component is arranged at the bottom end of the plurality of inner clamping plates; and a switching drive component, which is used to cancel the rigid force required for the plurality of outer clamping plates to clamp the outer surface of the self-clamping nut body in the process of driving the plurality of inner clamping plates to synchronously approach the inner wall of the rivet nut body inside the self-clamping nut body for clamping; wherein, when the self-clamping nut body is placed in the limit frame, the self-clamping nut body is arranged between the outer clamping plate and the inner clamping plate.

[0006] Specifically, the limit frame is fixedly arranged on the top surface of the processing table; It should be understood that the rivet nut body has an inner cavity and an outer edge surface, the outer edge surface is used to cooperate with a wrench for tightening and adjustment, and the inner cavity is used to open threads for threaded connection; specifically, multiple outer clamping plates can correspond one-to-one to multiple outer edges.

[0007] During the processing of the rivet nut body, when the outer surface of the rivet nut body needs to be processed, the rivet nut body is first placed in the limit frame and is between the outer clamping plate and the inner clamping plate. Under the action of the first elastic support, the rivet nut body can be initially positioned, and then the driving assembly is switched to drive the plurality of inner clamping plates to synchronously approach the inner wall of the rivet nut body to clamp the rivet nut body. The rigid force required for the plurality of outer clamping plates to clamp the outer surface of the rivet nut body is synchronously canceled. After the clamping of the inner wall of the rivet nut body is completed, the height of the rivet nut body and the inner clamping plate is adjusted by the height adjustment assembly, so that the rivet nut body is moved out of the limit frame, so that the outer surface of the rivet nut body is opened, so that the outer surface of the rivet nut body can be processed conveniently. When the inner wall surface of the rivet nut body needs to be processed, the height of the rivet nut body is lowered by the height adjustment component so that the rivet nut body is reset to the limit frame, and then the multiple inner clamping plates are driven away from the inner wall of the rivet nut body by the switching drive component. After the clamping of the inner wall of the rivet nut body is cancelled, a rigid force is applied to the multiple outer clamping plates to maintain the clamping position of the outer surface of the rivet nut body, and then the height of the inner clamping plate is adjusted by the height adjustment component so that the top end of the inner clamping plate is below the rivet nut body, and the shielding of the inner surface of the rivet nut body is cancelled; It should be further explained that by setting a switching drive component to switch the outer clamping plate and the inner clamping plate, automatic switching of the clamping of the outer surface and the inner wall of the rivet nut body is achieved, so that the positioning clamping device has two clamping modes for clamping the outer surface and the inner wall of the rivet nut body, and the clamping mode is automatically switched according to the needs of processing the outer surface and the inner wall of the rivet nut body.

[0008] In one embodiment, the height adjustment assembly includes: a first clearance groove, which is opened through the top surface of the processing table, and a plurality of limiting channels are opened on the side wall of the first clearance groove to provide space for the movement of the inner clamping plate; a cylinder, which is fixedly installed on the inner bottom surface of the installation cavity; a moving plate, which is fixedly connected to the end of the piston rod of the cylinder; four connecting rails, which are fixedly connected to the top of the moving plate and are distributed in a circular array with the moving plate as a reference, and the plurality of inner clamping plates respectively pass through the plurality of limiting channels and are slidably inserted on the surface of the plurality of connecting rails.

[0009] It should be understood that the height of the movable plate is adjusted by the cylinder, and the movable plate synchronously drives the four inner clamping plates to change their height through the connecting rails. And under the premise of keeping the height adjustment of the inner clamping plates, the setting of the connecting rails avoids the occurrence of obstacles to the clamping adjustment of the inner clamping plates.

[0010] In one embodiment, an auxiliary support component is further provided on the top of the movable plate (8), and the auxiliary support component comprises: a support frame, the support frame is fixedly connected to the top of the movable plate, and sliding grooves are provided on both sides; two plug-in frames, the two plug-in frames are respectively slidably plugged into the two sliding grooves, and support platforms are provided on the top; two limit slots, the two limit slots are provided on the top of the processing table, and the limit platforms are fixedly provided on the inner walls, and the bottom end of the support platform is contacted with the top of the limit platform.

[0011] In one embodiment, the auxiliary support assembly also includes: two connectors, which are respectively fixedly connected to the tops of the two plug-in frames and are respectively slidably plugged into the ends of the two support platforms; two linkage rails, which are respectively fixedly connected to the bottoms of the two support platforms, and linkage pins are slidably arranged inside the two linkage rails; two traction frames, which are respectively rotatably connected to the two linkage pins, and second elastic support members are respectively arranged between the bottom ends and the two plug-in frames; and two limit plates, which are fixedly connected to the two sides of the support frame near the top.

[0012] In one embodiment, the second elastic support member includes: a plug-in rod, the plug-in rod is fixedly connected to the surface of the plug-in frame, and the top end thereof penetrates and is plugged into the bottom end of the traction frame; a second support spring, the second support spring is sleeved on the surface of the plug-in rod, and the two ends thereof are respectively fixedly connected to the traction frame and the bottom end of the plug-in rod. It should be understood that when the support platform moves upward and leaves the limiting groove, the second support spring can push the traction frame to move upward relative to the plug-in frame until it is reset, so that the support platform is away from the bottom surface of the rivet nut body, which is conducive to reducing the obstruction of the bottom surface of the rivet nut body and providing favorable conditions for the later processing of the outer surface of the rivet nut body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes automatic switching of the clamping of the outer surface and the inner wall of the rivet nut body by setting a switching drive component to switch the outer clamping plate and the inner clamping plate, so that the positioning clamping device has two clamping modes for clamping the outer surface and the inner wall of the rivet nut body, and the clamping mode is automatically switched according to the needs of processing the outer surface and the inner wall of the rivet nut body.

[0014] When the rivet nut body is in the limit frame, the limit platform will support the bottom of the rivet nut body, so that there is a gap between the rivet nut body and the surface of the processing platform. When the inner wall of the rivet nut body is processed, more processing space is left for the bottom end of the inner wall of the rivet nut body.

[0015] After the outer surface of the rivet nut body is clamped, the cylinder is started to pull the movable plate to move. In the process of adjusting the movable plate and the inner clamping plate to be below the rivet nut body, the support platform maintains a constant height under the limit of the limit platform of the limit slot, and the support frame will continue to descend synchronously driven by the movable plate, and the support frame will simultaneously drive the limit plate to descend. In the process of the support frame synchronously driving the limit to descend, the limit plate will pull the traction frame, and the traction frame will drive the linkage pin to move in the linkage rail while compressing the second elastic support member, thereby driving the support platform to move toward the bottom surface of the rivet nut body, reducing the support platform's obstruction of the bottom end space of the inner side wall of the rivet nut body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a first overall structural schematic diagram of the present invention.

[0017] Figure 2 for Figure 1 Enlarged view of part A.

[0018] Figure 3 It is a structural schematic diagram of a processing table when the inner surface of the self-clinching nut body of the present invention is in a state to be processed.

[0019] Figure 4 For the present invention Figure 3 Enlarged view of part B.

[0020] Figure 5 It is a second overall structural schematic diagram of the present invention.

[0021] Figure 6 for Figure 5 Enlarged view of part C.

[0022] Figure 7 It is a schematic structural diagram of the rotary drive assembly and the inner clamping plate of the present invention.

[0023] Figure 8 It is a schematic structural diagram of the movable plate, the supporting frame and the inner clamping plate of the present invention.

[0024] Fig. 9 It is a structural cross-sectional view of the inner clamping plate of the present invention.

[0025] Fig.10 It is a schematic structural diagram of the support frame, the plug-in frame, the plug-in component, the support platform, the linkage rail, the second elastic support frame and the traction frame of the present invention.

[0026] Fig.11 It is a schematic structural diagram of the limiting through groove and the limiting platform on the processing table of the present invention.

[0027] In the figure: processing table 1, installation cavity 101, limit frame 2, outer clamping plate 3, inner clamping plate 4, rivet nut body 5, first clearance groove 6, limit channel 601, cylinder 7, moving plate 8, connecting rail 9, connecting groove 10, support rod 11, first support spring 12, first drive ring 13, first arc guide groove 14, first guide pin 15, second drive ring 16, second arc guide groove 17, second guide pin 18, second clearance groove 19, pressing block 20, limit connection Block 2001, support rail 2002, first linkage gear ring 21, second linkage gear ring 22, first motor 23, drive gear 2301, support frame 24, plug-in frame 25, support platform 26, limit slot 27, limit platform 28, plug-in component 29, linkage rail 30, linkage pin 3001, traction frame 31, limit plate 32, plug-in rod 33, second support spring 34, inner clamping claw 35, connecting rod 36, third support spring 37, first direction b, second direction a. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0029] like Figures 1 to 8 As shown, in one embodiment, a positioning and clamping device for processing rivet nuts includes a processing table 1, the processing table 1 has an installation cavity 101, and also includes: a limit frame 2, a plurality of outer clamping plates 3 are arranged in the limit frame 2, and a first elastic support is arranged between the plurality of outer clamping plates 3 and the limit frame 2; a plurality of inner clamping plates 4, a plurality of inner clamping plates 4, and a height adjustment component is arranged at the bottom end of the plurality of inner clamping plates 4; and a switching drive component, which is used to cancel the rigid force required for the plurality of outer clamping plates 3 to clamp the outer surface of the rivet nut body 5 in the process of driving the plurality of inner clamping plates 4 to synchronously approach the inner wall of the rivet nut body 5 inside the rivet nut body 5 for clamping; wherein, when the rivet nut body 5 is placed in the limit frame 2, the rivet nut body 5 is arranged between the outer clamping plates 3 and the inner clamping plates 4.

[0030] Specifically, the limit frame 2 is fixedly arranged on the top surface of the processing table; It should be understood that the rivet nut body 5 has an inner cavity and an outer edge surface, the outer edge surface is used to cooperate with a wrench for tightening and adjustment, and the inner cavity is used to open threads for threaded connection; specifically, multiple outer clamping plates 3 can correspond to multiple outer edges one by one.

[0031] During the processing of the rivet nut body 5, when the outer surface of the rivet nut body 5 needs to be processed, the rivet nut body 5 is first placed in the limit frame 2 and is between the outer clamping plate 3 and the inner clamping plate 4. Under the action of the first elastic support, the rivet nut body 5 can be initially positioned, and then the driving assembly is switched to drive the multiple inner clamping plates 4 to synchronously approach the inner wall of the rivet nut body 5 inside the rivet nut body 5 to clamp, and the rigid force required for the multiple outer clamping plates 3 to clamp the outer surface of the rivet nut body 5 is synchronously canceled. After the inner wall of the rivet nut body 5 is clamped, the height of the rivet nut body 5 and the inner clamping plate 4 is adjusted by the height adjustment assembly, so that the rivet nut body 5 moves out of the limit frame 2, so that the outer surface of the rivet nut body 5 is opened, which is convenient for processing the outer surface of the rivet nut body 5. When the inner wall surface of the rivet nut body 5 needs to be processed, the height of the rivet nut body 5 is lowered by the height adjustment component so that the rivet nut body 5 is reset to the limit frame 2, and then the multiple inner clamping plates 4 are driven away from the inner wall of the rivet nut body 5 by the switching drive component. After the clamping of the inner wall of the rivet nut body 5 is cancelled, a rigid force is applied to the multiple outer clamping plates 3 to maintain the clamping and positioning of the outer surface of the rivet nut body 5, and then the height of the inner clamping plate 4 is adjusted by the height adjustment component so that the top end of the inner clamping plate 4 is below the rivet nut body 5, and the inner surface of the rivet nut body 5 is not blocked; It should be further explained that by setting a switching drive component to switch the outer clamping plate 3 and the inner clamping plate 4, automatic switching of the clamping of the outer surface and the inner wall of the rivet nut body 5 is achieved, so that the positioning clamping device has two clamping modes for clamping the outer surface and the inner wall of the rivet nut body 5, and the clamping mode is automatically switched according to the needs of processing the outer surface and the inner wall of the rivet nut body 5.

[0032] like Figure 1 , Figure 3 and Figure 8 As shown, in one embodiment, the height adjustment component includes: a first clearance groove 6, the first clearance groove 6 is opened through the top surface of the processing table 1, and a plurality of limiting channels 601 are opened on the side wall of the first clearance groove 6 to provide space for the movement of the inner clamping plate 4; a cylinder 7, the cylinder 7 is fixedly installed on the inner bottom surface of the installation cavity 101; a moving plate 8, the moving plate 8 is fixedly connected to the end of the piston rod of the cylinder 7; four connecting rails 9, the four connecting rails 9 are fixedly connected to the top of the moving plate 8, and are distributed in a circular array with the moving plate 8 as a reference, and the multiple inner clamping plates 4 pass through the multiple limiting channels 601 respectively and then slide and plug on the surface of the multiple connecting rails 9.

[0033] It should be understood that the height of the movable plate 8 is adjusted by the cylinder 7, and the movable plate 8 synchronously drives the four inner clamping plates 4 to change their height through the connecting rail 9. And under the premise of keeping the height adjustment of the inner clamping plates 4, the setting of the connecting rail 9 avoids the occurrence of obstacles to the clamping adjustment of the inner clamping plates 4.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment, the first elastic support member includes: a connecting groove 10, the connecting groove 10 is opened on the inner wall of the limit frame 2, and the outer clamping plate 3 at the corresponding position is slidably set in the connecting groove 10; a support rod 11, the support rod 11 passes through the limit frame 2 from the connecting groove 10 and extends to the outside of the limit frame 2; a first support spring 12, the first support spring 12 is sleeved on the surface of the support rod 11 and the two ends are respectively fixedly connected to the outer clamping plate 3 and the inside of the connecting groove 10.

[0035] It should be understood that by providing the support rod 11 and the first support spring 12, elastic support for the outer clamping plate 3 is maintained before the outer clamping plate 3 receives the rigid force applied by the switching drive assembly, so that after the rivet nut body 5 is placed in the limit frame 2, the outer clamping plate 3 can be supported by the limit, thereby maintaining the initial positioning of the rivet nut body 5.

[0036] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, the switching drive assembly includes: a first drive ring 13, the first drive ring 13 is rotatably connected to the top surface of the interior of the installation cavity 101, and has a plurality of first arc guide grooves 14 on the surface, and the plurality of first arc guide grooves 14 are all slidably connected with first guide pins 15, and the plurality of first guide pins 15 are respectively slidably connected to the side walls of the plurality of inner clamping plates 4; a second drive ring 16, the second drive ring 16 is rotatably connected to the top surface of the interior of the installation cavity 101, and has a plurality of second arc guide grooves 17 on the surface, and the plurality of second arc guide grooves 17 are all slidably arranged inside There is a second guide pin 18; a plurality of second make way grooves 19, which correspond to the plurality of second guide pins 18 one by one and are opened through the top surface of the processing table 1, and the plurality of second guide pins 18 pass through the plurality of second make way grooves 19 respectively; a plurality of pressing blocks 20, which are respectively fixedly connected to the top ends of the plurality of second guide pins 18, and the plurality of pressing blocks 20 are slidably arranged on the top surface of the processing table 1; a rotating drive assembly, which is used to drive the first drive ring 13 and the second drive ring 16 to rotate synchronously, and the rotation directions of the first drive ring 13 and the second drive ring 16 are opposite.

[0037] Specifically, both sides of the pressure block 20 are fixedly connected to the limiting connection blocks 2001, and the limiting connection blocks 2001 on both sides of the pressure block 20 are slidably provided with support rails 2002, and the support rails 2002 are fixedly connected to the top surface of the processing table 1 to realize the sliding setting of the pressure block 20 on the top surface of the processing table 1.

[0038] It should be understood that, before placing the rivet nut body 5, the first driving ring 13 is driven to rotate in the first direction b by the rotating driving assembly, and the second driving ring 16 is driven to rotate in the second direction a, so that a certain distance is maintained between the pressing block 20 and the support rod 11, and no rigid force is applied to the support rod 11, and a certain distance is maintained between the inner clamping plate 4 and the inner wall of the rivet nut body 5, so that the rivet nut body 5 can be placed between the outer clamping plate 3 and the inner clamping plate 4. The specific adjustment method is as follows: The first arc-shaped guide groove 14 on the first driving ring 13 will drive the first guide pin 15 to move as the first driving ring 13 rotates, and the first guide pin 15 will drive the inner clamping plate 4 to move away from the inner side wall of the rivet nut body 5. The second arc-shaped guide groove 17 on the second driving ring 16 will drive the second guide pin 18 to move as the second driving ring 16 rotates, and the second guide pin 18 drives the pressing block 20 to synchronously move close to the support rod 11, but keep a distance between the pressing block 20 and the support rod 11. Secondly, after the rivet nut body 5 is placed in the limiting frame 2 and between the inner clamping plate 4 and the outer clamping plate 3, the outer surface of the rivet nut body 5 is processed first. Therefore, the first drive ring 13 is driven to rotate in the second direction a by the rotary drive assembly, and the second drive ring 16 is driven to rotate in the first direction b. The inner clamping plate 4 gradually approaches the inner side wall of the rivet nut body 5, and the pressing block 20 is away from the support rod 11 until the inner clamping plate 4 completes the clamping of the inner side wall of the rivet nut body 5. Then, the cylinder 7 is started to push the moving plate 8 to move, thereby driving the inner clamping plate 4 and the rivet nut body 5 clamped on the inner clamping plate 4 to move out of the limiting frame 2, providing a good processing space for processing the outer surface of the rivet nut body 5. Then, when the inner wall of the rivet nut body 5 needs to be processed, the cylinder 7 is started, and the movable plate 8 is pulled to move and reset, thereby driving the rivet nut body 5 to reset into the limit frame 2, and then the first drive ring 13 is driven to move in the first direction b by switching the drive assembly, and the second drive ring 16 is driven to move in the second direction a, so that the inner clamping plate 4 cancels the clamping of the inner wall of the rivet nut body 5, and the pressing block 20 gradually approaches the support rod 11 until the pressing block 20 is pressed against the support rod 11, thereby indirectly rigidly acting on the outer clamping plate 3, so that the outer clamping plate 3 maintains a firm clamping of the outer surface of the rivet nut body 5, and then the movable plate 8 is continuously pulled downward by the starting cylinder 7 until the top end of the inner clamping plate 4 is below the rivet nut body 5, canceling the shielding of the inner wall space of the rivet nut body 5, and providing a processing space for processing the inner wall of the rivet nut body 5; Finally, after the inner wall of the rivet nut body 5 is processed, the height of the movable plate 8 is adjusted by the cylinder 7 so that the inner clamping plate 4 is in the limit frame 2, and the outer clamping plate 3 and the inner clamping plate 4 are adjusted to the initial state for convenient placement of the rivet nut body 5 by switching the drive assembly.

[0039] like Figure 5 , Figure 6 and Figure 7 As shown, in one embodiment, the rotary drive assembly includes: a first linkage gear ring 21, which is fixedly connected to the outer ring surface of the first drive ring 13; a second linkage gear ring 22, which is fixedly connected to the inner ring surface of the second drive ring 16; a first motor 23, which is fixedly connected to the inner top surface of the mounting cavity 101 and is located between the first drive ring 13 and the second drive ring 16, and the output end of the first motor 23 is fixedly connected to a driving gear 2301, and the two sides of the driving gear 2301 are respectively meshed with the first linkage gear ring 21 and the second linkage gear ring 22.

[0040] It should be understood that by controlling the rotation direction of the first motor 23, the rotation direction of the driving gear 2301 is driven. In the process of the first motor 23 driving the driving gear 2301 to rotate, when the first driving ring 13 rotates in the second direction a, the second driving ring 16 rotates in the first direction b. In the process of the first motor 23 driving the driving gear 2301 to rotate, when the first driving ring 13 rotates in the first direction b, the second driving ring 16 rotates in the second direction a.

[0041] like Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 and Fig.11As shown, in one embodiment, an auxiliary support assembly is further provided at the top of the movable plate 8, and the auxiliary support assembly includes: a support frame 24, the support frame 24 is fixedly connected to the top of the movable plate 8, and sliding grooves are provided on both sides; two plug-in frames 25, the two plug-in frames 25 are respectively slidably plugged in the two sliding grooves, and a support platform 26 is provided at the top; two limiting through grooves 27, the two limiting through grooves 27 are provided at the top of the processing table 1, and the limiting platform 28 is fixedly provided on the inner wall, and the bottom end of the support platform 26 is contacted and provided at the top of the limiting platform 28. It should be understood that when the rivet nut body 5 is in the limiting frame 2, the limiting platform 28 will support the support platform 26, and the support platform 26 will support the bottom of the rivet nut body 5, so that there is a gap between the rivet nut body 5 and the surface of the processing table 1, and when the inner side wall of the rivet nut body 5 is processed, more processing space is reserved for the bottom end of the inner side wall of the rivet nut body 5.

[0042] like Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig.10 and Fig.11 As shown, in one embodiment, the auxiliary support assembly also includes: two connectors 29, the two connectors 29 are respectively fixedly connected to the tops of the two plug-in frames 25, and are respectively slidably plugged into the ends of the two support platforms 26; two linkage rails 30, the two linkage rails 30 are respectively fixedly connected to the bottoms of the two support platforms 26, and linkage pins 3001 are slidably arranged inside the two linkage rails 30; two traction frames 31, the two traction frames 31 are respectively rotatably connected to the two linkage pins 3001, and second elastic support members are respectively arranged between the bottom ends and the two plug-in frames 25; two limit plates 32, the two limit plates 32 are fixedly connected to the two sides of the support frame 24 near the top.

[0043] It should be understood that after the outer surface of the rivet nut body 5 is clamped, the cylinder 7 is started to pull the movable plate 8 to move, and in the process of adjusting the movable plate 8 and the inner clamping plate 4 to be below the rivet nut body 5, the support platform 26 maintains a constant height under the limit of the limit platform 28 of the limit slot 27, and the support frame 24 will continue to descend synchronously driven by the movable plate 8, and the support frame 24 will simultaneously drive the limit plate 32 to descend. In the process of the support frame 24 synchronously driving the limit plate 32 to descend, the limit plate 32 will pull the traction frame 31, and the traction frame 31 will compress the second elastic support member while driving the linkage pin 3001 to move in the linkage rail 30, thereby driving the support platform 26 to move toward the bottom surface of the rivet nut body 5, thereby reducing the support platform 26 from blocking the bottom end space of the inner side wall of the rivet nut body 5.

[0044] Further explanation, such as Figure 4 and Fig.11As shown, the limit platform 28 is fixedly connected in the limit slot 27, and the support platform 26 is in the limit slot 27 and is in contact with the top of the limit platform 28. Therefore, the limit platform 28 will limit the support platform 26 from continuing to descend.

[0045] like Fig.10 As shown, in one embodiment, the second elastic support member includes: a plug rod 33, the plug rod 33 is fixedly connected to the surface of the plug frame 25, and the top end thereof penetrates and is plugged into the bottom end of the traction frame 31; a second support spring 34, the second support spring 34 is sleeved on the surface of the plug rod 33, and the two ends are respectively fixedly connected to the traction frame 31 and the bottom end of the plug rod 33. It should be understood that when the support platform 26 moves upward and leaves the limiting groove 27, the second support spring 34 can push the traction frame 31 to move upward relative to the plug frame 25 until it is reset, so that the support platform 26 is away from the bottom surface of the rivet nut body 5, which is conducive to reducing the obstruction of the bottom surface of the rivet nut body 5, and provides favorable conditions for the later processing of the outer surface of the rivet nut body 5.

[0046] like Fig. 9 As shown, in one embodiment, a plurality of connecting rods 36 are inserted into the top ends of the plurality of inner clamping plates 4, the ends of the plurality of connecting rods 36 are fixedly connected with the inner clamping claws 35, a third support spring 37 is sleeved on the surface of the connecting rods 36, and the two ends of the third support spring 37 are fixedly connected with the inner clamping claws 35 and the inner clamping plates 4 respectively. By setting the connecting rod 36 and the third supporting spring 37, the inner clamping claw 35 is elastically supported on the inner clamping plate 4. When the rivet nut body 5 is placed at the position of the inner clamping plate 4 and the outer clamping plate 3, the inner clamping claw 35 and the outer clamping plate 3 are both elastically supported, and a certain shelf space is maintained between the inner clamping claw 35 and the outer clamping plate 3. When the rivet nut body 5 is inserted into the shelf space, the inner clamping claw 35 and the outer clamping plate 3 can provide elastic clearance space, and when the external force applied to the rivet nut body 5 is cancelled, the inner clamping claw 35 and the outer clamping plate 3 can adjust and position the position of the rivet nut body 5 under the elastic action to achieve initial positioning.

[0047] like Figure 1 , Figure 2 and Fig. 9 As shown, in one embodiment, the top ends of the inner clamping claw 35 and the outer clamping plate 3 are both provided with guiding arc surfaces. It should be understood that by providing the guiding arc surfaces, when the rivet nut body 5 is inserted into the storage space, the guiding arc surfaces at the top ends of the inner clamping claw 35 and the outer clamping plate 3 play a guiding role, so as to avoid the rivet nut body 5 being pressed against by the top ends of the inner clamping claw 35 and the outer clamping plate 3 when the rivet nut body 5 is inserted into the storage space.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A positioning and clamping device for processing a self-clinching nut, comprising a processing table (1), the processing table (1) having a mounting cavity (101), characterized in that: Also includes: A limit frame (2), wherein a plurality of outer clamping plates (3) are arranged inside the limit frame (2), and a first elastic support member is arranged between each of the plurality of outer clamping plates (3) and the limit frame (2); A plurality of inner clamping plates (4), wherein the bottom ends of the plurality of inner clamping plates (4) are provided with height adjustment components; and A switching drive assembly is used to cancel the rigid force required by the plurality of outer clamping plates (3) to clamp the outer surface of the self-clamping nut body (5) in the process of driving the plurality of inner clamping plates (4) to synchronously approach the inner wall of the self-clamping nut body (5) inside the self-clamping nut body (5) for clamping; When the self-clinching nut body (5) is placed in the limiting frame (2), the self-clinching nut body (5) is arranged between the outer clamping plate (3) and the inner clamping plate (4).

2. A positioning and clamping device for processing self-clinching nuts according to claim 1, characterized in that: The height adjustment assembly comprises: A first clearance groove (6), the first clearance groove (6) being formed through the top surface of the processing table (1), and a plurality of limiting channels (601) are formed on the side wall of the first clearance groove (6) to provide space for the inner clamping plate (4) to move; A cylinder (7), the cylinder (7) being fixedly mounted on the inner bottom surface of the mounting cavity (101); A movable plate (8), the movable plate (8) being fixedly connected to the end of the piston rod of the cylinder (7); Four connecting rails (9), the four connecting rails (9) are fixedly connected to the top of the movable plate (8) and are distributed in a circular array with the movable plate (8) as a reference, and the plurality of inner clamping plates (4) respectively pass through the plurality of limiting channels (601) and are then slidably plugged onto the surfaces of the plurality of connecting rails (9).

3. A positioning and clamping device for processing self-clinching nuts according to claim 2, characterized in that: The first elastic support member comprises: A connecting groove (10), wherein the connecting groove (10) is provided on the inner side wall of the limiting frame (2), and the outer clamping plate (3) at a corresponding position is slidably arranged in the connecting groove (10); A support rod (11), wherein the support rod (11) passes through the limiting frame (2) from the connection groove (10) and then extends to the outside of the limiting frame (2); A first support spring (12), the first support spring (12) is sleeved on the surface of the support rod (11) and has two ends fixedly connected to the outer clamping plate (3) and the inside of the connecting groove (10) respectively.

4. A positioning and clamping device for processing self-clinching nuts according to claim 3, characterized in that: The switching drive component comprises: A first drive ring (13), the first drive ring (13) being rotatably connected to the inner top surface of the mounting cavity (101), and having a plurality of first arc-shaped guide grooves (14) on the surface, a first guide pin (15) being slidably connected in each of the plurality of first arc-shaped guide grooves (14), and the plurality of first guide pins (15) being slidably connected to the side walls of the plurality of inner clamping plates (4); A second drive ring (16), the second drive ring (16) being rotatably connected to the inner top surface of the mounting cavity (101) and having a plurality of second arc-shaped guide grooves (17) on the surface, and second guide pins (18) being slidably arranged inside the plurality of second arc-shaped guide grooves (17); a plurality of second clearance grooves (19), the plurality of second clearance grooves (19) corresponding one to one with the plurality of second guide pins (18), and being arranged through the top surface of the processing table (1), the plurality of second guide pins (18) respectively passing through the plurality of second clearance grooves (19); A plurality of pressing blocks (20), wherein the plurality of pressing blocks (20) are respectively fixedly connected to the top ends of the plurality of second guide pins (18), and the plurality of pressing blocks (20) are all slidably arranged on the top surface of the processing table (1); The rotary drive assembly is used to drive the first drive ring (13) and the second drive ring (16) to rotate synchronously, and the rotation directions of the first drive ring (13) and the second drive ring (16) are opposite.

5. A positioning and clamping device for processing self-clinching nuts according to claim 4, characterized in that: The rotary drive assembly comprises: A first linkage gear ring (21), the first linkage gear ring (21) being fixedly connected to the outer ring surface of the first drive ring (13); a second linkage gear ring (22), the second linkage gear ring (22) being fixedly connected to the inner ring surface of the second drive ring (16); A first motor (23), the first motor (23) being fixedly connected to the top surface inside the installation cavity (101) and being located between the first drive ring (13) and the second drive ring (16), the output end of the first motor (23) being fixedly connected to a drive gear (2301), and two sides of the drive gear (2301) being respectively meshed with the first linkage gear ring (21) and the second linkage gear ring (22).

6. A positioning and clamping device for processing self-clinching nuts according to claim 5, characterized in that: An auxiliary support component is also provided on the top of the movable plate (8), and the auxiliary support component comprises: A support frame (24), the support frame (24) is fixedly connected to the top of the movable plate (8) and has sliding grooves on both sides; Two plug-in racks (25), the two plug-in racks (25) are respectively slidably plugged into the two sliding grooves, and the top ends of the two plug-in racks are each provided with a support platform (26); Two limiting through grooves (27), the two limiting through grooves (27) are opened on the top of the processing table (1), and the limiting platform (28) is fixedly arranged on the inner wall, and the bottom end of the support platform (26) is arranged in contact with the top of the limiting platform (28).

7. A positioning and clamping device for processing self-clinching nuts according to claim 6, characterized in that: The auxiliary support assembly also includes: Two plug-in connectors (29), the two plug-in connectors (29) are respectively fixedly connected to the tops of the two plug-in frames (25), and are respectively slidably plugged into the ends of the two support platforms (26); Two linkage rails (30), the two linkage rails (30) being fixedly connected to the bottoms of the two support platforms (26) respectively, and linkage pins (3001) are slidably arranged inside the two linkage rails (30); Two traction frames (31), the two traction frames (31) are rotatably connected to the two linkage pins (3001) respectively, and second elastic support members are arranged between the bottom ends and the two plug-in frames (25); Two limit plates (32), the two limit plates (32) are fixedly connected to positions on both sides of the support frame (24) close to the top end.

8. A positioning and clamping device for processing self-clinching nuts according to claim 7, characterized in that: The second elastic support member comprises: A plug-in rod (33), the plug-in rod (33) is fixedly connected to the surface of the plug-in frame (25), and the top end thereof penetrates and is plugged into the bottom end of the traction frame (31); A second support spring (34), the second support spring (34) is sleeved on the surface of the plug-in rod (33), and two ends of the second support spring are respectively fixedly connected to the traction frame (31) and the bottom end of the plug-in rod (33).

9. A positioning and clamping device for processing self-clinching nuts according to claim 8, characterized in that: A plurality of connecting rods (36) are inserted into the top ends of the plurality of inner clamping plates (4), the ends of the plurality of connecting rods (36) are fixedly connected to the inner clamping claws (35), a third support spring (37) is sleeved on the surface of the connecting rods (36), and the two ends of the third support spring (37) are respectively fixedly connected to the inner clamping claws (35) and the inner clamping plates (4).

10. A positioning and clamping device for processing self-clinching nuts according to claim 9, characterized in that: The top ends of the inner clamping claw (35) and the outer clamping plate (3) are both provided with guiding arc surfaces.

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