Rivet gun

Abstract

This utility model discloses a rivet gun, relating to the field of automated equipment. The body is slidably mounted on a base. A first drive cylinder is connected to the body and drives it to slide along a first direction. A nut collet is movable at the gun head. An elastic element is located between the nut collet and the gun head and drives the end of the nut collet away from the gun head to close. Thus, by enabling the elastic element to drive the end of the nut collet away from the gun head to close, the rivet nut can be driven towards the wire-drawing action, reducing the difficulty of matching the wire-drawing action with the rivet nut and minimizing the risk of thread wear on both the wire-drawing action and the rivet nut. By having the first drive cylinder drive the body to slide along the first direction, the impact of relative positional deviation between the body and the workpiece can be significantly reduced, improving rivet accuracy and thus increasing production efficiency and capacity.

Description

Technical Field

[0001] This utility model relates to the field of automated equipment, and in particular to a rivet gun. Background Technology

[0002] With the rapid development of automobile manufacturing, the proportion of automated production in the body production process is gradually increasing. In the automated riveting process, the existing rivet gun design is unreasonable, which makes it difficult to match the wire drawing of the rivet gun with the rivet nut. The threads of the wire drawing and the rivet nut are prone to wear. Moreover, the existing rivet gun has low precision, which affects the production efficiency and capacity of automobile bodies. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a rivet gun that facilitates easy wire drawing and rivet nut engagement, has a high degree of automation, and high precision, thereby improving workpiece production efficiency and capacity.

[0004] The rivet gun according to this utility model includes: a gun base, the gun base including: a base body and a first driving cylinder, the first driving cylinder being disposed on the base body; a gun body, the gun body including: a mechanism, a gun head, a nut collet, and an elastic element, the mechanism being disposed on the base body, the first driving cylinder being used to drive the mechanism to slide along a first direction, the gun head being disposed on the mechanism, the nut collet being movably disposed on the gun head, and the elastic element being disposed between the nut collet and the gun head and being used to drive the end of the nut collet away from the gun head to close; a gun body, the gun body being disposed on the mechanism and including: a first driving assembly, a gun shell, and a wire drawing, the gun shell being slidably disposed on the mechanism, the first driving assembly being disposed on the mechanism and being used to drive the gun shell to slide along the first direction, the wire drawing being rotatably disposed on the gun shell and passing through the nut collet; and a driving mechanism, the driving mechanism being used to drive the wire drawing to rotate.

[0005] According to the present invention, the rivet gun can drive the end of the nut collet away from the gun head to close by enabling the elastic element to drive the rivet nut toward the wire pulling action, thereby reducing the difficulty of the wire pulling and the rivet nut matching and reducing the risk of wear on the threads of the wire pulling and the rivet nut. By driving the machine body to slide along the first direction by the first drive cylinder, the influence caused by the relative position deviation between the machine body and the workpiece can be significantly reduced, improving the accuracy of riveting and helping to improve the production efficiency and capacity of the workpiece.

[0006] In some examples of this utility model, the driving mechanism includes: a second driving cylinder, a first transmission component, and a second transmission component. The second driving cylinder is drivenly connected to the first transmission component, and the second transmission component is drivenly connected between the first transmission component and the wire drawing. The first transmission component is configured to convert the linear motion of the second driving cylinder into rotational motion and output it to the second transmission component.

[0007] In some examples of this utility model, the second driving cylinder has a cylinder rod that is movable along the first direction. The first transmission component includes a screw, a guide tube, and a driving ball. The screw passes through the cylinder rod and forms a helical groove. The driving ball is movably embedded in the cylinder rod and has a portion of its structure in the helical groove. The cylinder rod passes through the guide tube, and the driving ball can roll along the inner wall of the guide tube and push the screw to rotate under the action of the cylinder rod.

[0008] In some examples of this utility model, the second transmission component includes: a first connecting shaft, a first pulley, and a timing belt. The gun body further includes: a second pulley. The first connecting shaft is driven between the first pulley and the screw. The timing belt is sleeved on the outside of the first pulley and the second pulley and is drivenly connected to both the first pulley and the second pulley. The second pulley is connected to the wire drawing transmission.

[0009] In some examples of this utility model, the drive mechanism is located on the gun casing.

[0010] In some examples of this utility model, the first driving component includes: a driving member, a lead screw, and a lead screw nut. The driving member is connected to the lead screw in a transmission manner. The lead screw nut is sleeved on the lead screw and threadedly engaged with the lead screw. The lead screw nut is fixedly connected to the gun housing.

[0011] In some examples of this utility model, the first drive assembly further includes: a reducer and a gear pair, the drive component is drivenly connected to the reducer, and the gear pair is drivenly connected between the reducer and the lead screw.

[0012] In some examples of this utility model, the nut clamp includes: two oppositely arranged sub-clamps, the sub-clamps being rotatably disposed on the gun head, and the elastic element being disposed between the sub-clamps and the gun head and used to drive the sub-clamps to rotate, so that the ends of the two sub-clamps away from the gun head are brought closer to each other, so that the end of the nut clamp away from the gun head is closed.

[0013] In some examples of this utility model, the sub-clamp head includes: a connecting part and a limiting part. The connecting part is connected to the limiting part and is rotatably disposed on the gun head. The limiting part defines a receiving cavity. The receiving cavities of the two limiting parts are connected and face each other. The inner wall surface of the receiving cavity includes: a first guide surface, a polygonal surface, and a second guide surface. Along the first direction, the polygonal surface is connected between the first guide surface and the second guide surface. From the end of the first guide surface near the connecting part to the end away from the connecting part, the first guide surface and the second guide surface gradually approach the center line of the nut clamp head.

[0014] In some examples of this utility model, the gun body further includes: a first sensor, wherein a connecting portion of one of the sub-clamp heads defines a mounting hole communicating with the receiving cavity, the first sensor passing through the mounting hole and having a portion of its structure located within the receiving cavity, the first sensor being used to detect whether there is a rivet nut within the receiving cavity.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the rivet gun and the workpiece according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of a rivet gun according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the gun mount according to an embodiment of the present utility model;

[0020] Figure 4 This is a top view of the gun body according to an embodiment of the present utility model;

[0021] Figure 5 yes Figure 4 Sectional view of DD;

[0022] Figure 6 This is a cross-sectional view of the gun body according to an embodiment of the present utility model;

[0023] Figure 7 This is a cross-sectional view of the gun body according to an embodiment of the present utility model;

[0024] Figure 8This is a cross-sectional view of the drive mechanism according to an embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of the nut clip according to an embodiment of the present utility model.

[0026] Figure label:

[0027] Riveting gun A; rivet nut B; workpiece C;

[0028] Gun mount 100; mount body 101; second sensor 102; first drive cylinder 103; first pressure regulating valve 104; first linear guide rail 105; first multi-way valve 106; second linear guide rail 107; first limit block 108; third sensor 109; second multi-way valve 110; second pressure regulating valve 111;

[0029] Gun body 200; main body 201; nail feeding tube 202; third linear guide rail 203; fixing component 2046; first connecting block 204; gun head 205; fixing block 206; locking nut 207; fixing sleeve 208; ferrule 209; reset ball 210; reset spring 211; guide post 212; snap ring 213; nut clip 215; sub-clip 2151; connecting part 21511; limiting part 21512; receiving cavity 2155; first guide surface 2152; polygonal surface 2153; second guide surface 2154; clamping block 216; second connecting block 217; pivot shaft 218; pivot hole 2181; end cap 219; bearing seat 220; second limiting block 221; mounting hole 222; elastic component 223; first sensor 224;

[0030] Gun body 300; First drive assembly 3001; Gun case 301; Lead screw 302; First spacer 303; Thrust bearing 304; Second spacer 305; Second bearing 306; Driven gear 307; First retaining ring 308; Drive gear 309; Second retaining ring 310; Reducer 311; Drive component 312; Lead nut 313; Third bearing 314; Second pulley 315;

[0031] First drive shaft 316; Fourth bearing 317; Fourth sensor 318; Fifth sensor 319; Spring 321; Tie rod 322; Wire puller 323; Anti-rotation pin 324; Anti-rotation screw 325; Cover plate 326; First bearing 327; Pad plate 328; Synchronous belt 329; Third retaining ring 330; Bushing 331; Gear pair 332;

[0032] Drive mechanism 400; second drive cylinder 401; first transmission assembly 4010; second transmission assembly 4020; connecting plate 402; support 403; cylinder rod 404; screw 405; guide tube 406; housing 407; drive ball 408; fixed seat 409; fifth bearing 410; pressure plate 411; first connecting shaft 412; first pulley 413; retaining ring 414; protective cover 415. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following is for reference. Figures 1-9 Description of rivet gun A according to an embodiment of the present utility model.

[0035] like Figures 1-9 As shown, the rivet gun A according to an embodiment of the present utility model includes: a gun base 100, a gun body 200, a gun frame 300, and a drive mechanism 400.

[0036] Gun mount 100 includes: mount body 101 and first drive cylinder 103, the first drive cylinder 103 being disposed on mount body 101;

[0037] The gun body 200 includes: a body 201, a gun head 205, a nut clip 215, and an elastic element 223. The body 201 is located on the base body 101. The first drive cylinder 103 is used to drive the body 201 to slide along a first direction. The gun head 205 is located on the body 201. The nut clip 215 is movably located on the gun head 205. The elastic element 223 is located between the nut clip 215 and the gun head 205 and is used to drive the end of the nut clip 215 away from the gun head 205 to close.

[0038] The gun body 300 is disposed on the body 201 and includes: a first drive assembly 3001, a gun shell 301, and a wire drawing 323. The gun shell 301 is slidably disposed on the body 201. The first drive assembly 3001 is disposed on the body 201 and is used to drive the gun shell 301 to slide along a first direction. The wire drawing 323 is rotatably disposed on the gun shell 301 and passes through the nut clip 215. The drive mechanism 400 is used to drive the wire drawing 323 to rotate.

[0039] The base body 101 is connected to the first drive cylinder 103. The connection between the base body 101 and the first drive cylinder 103 can be, but is not limited to, snap-fit ​​or bolt connection. As some embodiments of this application, the base body 101 and the first drive cylinder 103 are connected by bolt connection. As some embodiments of this application, part of the structure of the base body 101 is a flange, and a robot that controls the movement of the rivet gun A can be connected through the base body 101.

[0040] The machine body 201 is slidably mounted on the base body 101. A first drive cylinder 103 is connected to the machine body 201 via a transmission connection. This transmission connection can be, but is not limited to, a spline connection or a coupling connection. In some embodiments of this application, the first drive cylinder 103 is connected to the machine body 201 via a spline connection. The first drive cylinder 103 can drive the machine body 201 along a first direction (i.e.,...). Figure 3 Sliding in the X direction (as shown), the first drive cylinder 103 can be compressed to eliminate the gap between the machine body 201 and the workpiece C.

[0041] The nut clamp 215 is movably disposed on the gun head 205. The elastic member 223 is disposed between the nut clamp 215 and the gun head 205. As some embodiments of this application, the nut clamp 215 includes two sub-clamps 2151, which are arranged opposite each other. The elastic member 223 is disposed between the nut clamp 215 and the gun head 205. The sub-clamps 2151 are rotatably disposed on the gun head 205. The elastic member 223 can drive the sub-clamps 2151 to rotate so that the ends of the two sub-clamps 2151 away from the gun head 205 are brought closer together, so that the two sub-clamps 2151 are kept closed, and the end of the nut clamp 215 away from the gun head 205 is closed.

[0042] The gun body 300 is disposed on the body 201. The gun body 300 includes a first drive assembly 3001, a gun case 301, and a wire drawing 323. The gun case 301 is slidably disposed on the body 201. As some embodiments of this application, the gun case 301 is slidably disposed on the body 201. The first drive assembly 3001 is disposed on the body 201. The connection method between the first drive assembly 3001 and the body 201 can be, but is not limited to, snap-fit, bolt connection, etc. As some embodiments of this application, the first drive assembly 3001 and the body 201 are connected by bolt connection.

[0043] The first drive assembly 3001 is connected to the gun housing 301 via a transmission connection. This connection can be, but is not limited to, a spline connection or a coupling connection. As some embodiments of this application, the first drive assembly 3001 and the gun housing 301 are connected via a spline connection. The first drive assembly 3001 is used to drive the gun housing 301 along a first direction (i.e.,...). Figure 3 (As shown in the X direction) slides, the wire 323 is rotatably disposed on the gun housing 301, and the wire 323 passes through the nut clip 215.

[0044] The drive mechanism 400 is used to drive the wire drawing 323 to rotate. As some embodiments of this application, the drive mechanism 400 is constructed as a drive motor, and the drive mechanism 400 is connected to the wire drawing 323 to drive the wire drawing 323 to rotate.

[0045] It should be noted that when riveting or bolting is required, the rivet nut B is first inserted into the nut collet 215, and then the first drive assembly 3001 drives the gun housing 301 along the first direction (i.e., Figure 3 The wire drawing 323 moves toward the nut collet 215 in the X direction (as shown), thereby being pushed along the first direction (i.e., the wire drawing 323 is driven by the first drive assembly 3001) in the first direction (i.e., the wire drawing 323 is driven along the first direction). Figure 3 The wire 323 moves towards the nut clamp 215 in the X direction (as shown). After contacting the rivet nut B, it continues to move forward. At this time, the nut clamp 215 is under force, and the ends of the two sub-clamps 2151 away from the gun head 205 move away from each other to keep the two sub-clamps 2151 slightly open. Then, the drive mechanism 400 drives the wire 323 to rotate. Under the action of the nut clamp 215, the wire 323 screws into the rivet nut B, and at the same time, the rivet nut B moves towards the wire 323, and the nut clamp 215 closes. Finally, the drive mechanism 400 drives the wire 323 to stop rotating, and the rivet insertion is completed.

[0046] Next, riveting is performed, and the first drive assembly 3001 drives the gun housing 301 along the first direction (i.e., Figure 3 Slide in the X direction (as shown) to push the rivet nut B out of the nut clip 215 through the wire pull 323, the nut clip 215 closes, and the first drive cylinder 103 is in the extended state.

[0047] The robot controls the rivet gun A to reach a predetermined position, and controls the first drive cylinder 103 to extend. The robot drives the rivet gun A to insert the rivet nut B into the pre-made assembly hole of the workpiece C, and compresses the first drive cylinder 103 (the piston rod of the first drive cylinder 103 is compressed by 3-4 cm). Then the robot stops moving. Next, the first drive assembly 3001 pushes the gun housing 301, thereby driving the wire drawing 323 along the first direction (i.e., Figure 3The rivet nut B moves away from the workpiece C in the X direction (as shown) so that it contacts the nut clip 215. Then, the gun housing 301 is pulled to cause the rivet nut B to undergo plastic deformation and be riveted to the workpiece C. Then, the first drive assembly 3001 is stopped, and the riveting is completed.

[0048] After riveting is completed, the riveting needs to be removed. The first drive assembly 3001 pushes the gun housing 301, which in turn drives the wire drawing 323 along the first direction (i.e. Figure 3 The wire drawing mechanism 400 drives the wire drawing 323 to rotate in the opposite direction and disengage from the rivet nut B. At the same time, the first drive assembly 3001 pushes the gun housing 301, thereby driving the wire drawing 323 to move along the first direction (i.e., the X direction shown) towards the side closer to the gun head 205. Figure 3 The X direction (as shown) moves toward the side away from the gun head 205 and drives the gun body 200 to move backward as well. The first drive cylinder 103 is further compressed until the nail ejection is completed.

[0049] It should be noted that there are individual differences in the relative positions of workpiece C and nut collet 215. In order to ensure that workpiece C and rivet nut B are tightly fitted before riveting, the first drive cylinder 103 drives the machine body 201 along the first direction (i.e., Figure 3 Sliding in the X direction (as shown) allows the workpiece C and the rivet nut B to fit tightly together, thereby eliminating the relative positional error between the workpiece C and the nut clamp 215 by compressing the first drive cylinder 103. It is understood that if the air pressure of the first drive cylinder 103 is too low, it may not be able to eliminate the positional error between the workpiece C and the rivet nut B; if the air pressure of the first drive cylinder 103 is too high, it may cause quality defects such as deformation of the workpiece C. The air pressure of the first drive cylinder 103 can be appropriately adjusted according to the actual situation on site. The air pressure of the first drive cylinder 103 is, but is not limited to, 0.5 bar.

[0050] Furthermore, by enabling the nut clip 215 to close under the action of the elastic element 223, it is easier to make the rivet nut B and the wire 323 threadedly engage, which can reduce the risk of thread wear of the wire 323 and the rivet nut B, and improve the reliability of the rivet gun A. Moreover, the rivet gun A proposed in this application has a high degree of automation, which is conducive to improving production efficiency.

[0051] Therefore, by enabling the elastic element 223 to drive the end of the nut clamp 215 away from the gun head 205 to close, the rivet nut B can be driven to move towards the wire puller 323, reducing the difficulty of the engagement between the wire puller 323 and the rivet nut B, and reducing the risk of thread wear between the wire puller 323 and the rivet nut B. By enabling the first drive cylinder 103 to drive the machine body 201 to slide along the first direction, the influence caused by the relative position deviation between the machine body 201 and the workpiece C can be significantly reduced, improving the accuracy of riveting, which is conducive to improving the production efficiency and capacity of the workpiece C.

[0052] In some embodiments of this utility model, such as Figure 8 As shown, the drive mechanism 400 includes: a second drive cylinder 401, a first transmission assembly 4010, and a second transmission assembly 4020. The second drive cylinder 401 is connected to the first transmission assembly 4010, and the second transmission assembly 4020 is connected between the first transmission assembly 4010 and the wire drawing 323. The first transmission assembly 4010 is configured to convert the linear motion of the second drive cylinder 401 into rotational motion and output it to the second transmission assembly 4020.

[0053] The second drive cylinder 401 is connected to the first transmission assembly 4010. The transmission connection between the second drive cylinder 401 and the first transmission assembly 4010 can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the second drive cylinder 401 and the first transmission assembly 4010 are connected by a coupling.

[0054] The second transmission component 4020 is connected between the first transmission component 4010 and the wire drawing 323. The second transmission component 4020 is connected to the first transmission component 4010. The transmission connection between the second transmission component 4020 and the first transmission component 4010 can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the second transmission component 4020 and the first transmission component 4010 are connected by a coupling.

[0055] The second transmission component 4020 is connected to the wire drawing 323. The transmission connection between the second transmission component 4020 and the wire drawing 323 can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the second transmission component 4020 and the wire drawing 323 are connected by a coupling.

[0056] The first transmission component 4010 is configured to convert the linear motion of the second drive cylinder 401 into rotational motion and output it to the second transmission component 4020. In other words, the first transmission component 4010 can convert the linear motion of the second drive cylinder 401 into rotational motion and transmit it to the second transmission component 4020.

[0057] This configuration enables the drive mechanism 400 to drive the wire drawing 323 to rotate via the second drive cylinder 401, and converts the linear motion of the second drive cylinder 401 into rotational motion, reducing the torque of the wire drawing 323 rotation and significantly reducing the probability of the wire drawing 323 being damaged due to excessive torque.

[0058] In some embodiments of this utility model, such as Figure 8 As shown, the second drive cylinder 401 has a cylinder rod 404, which is driven along a first direction (i.e., Figure 3 The first transmission assembly 4010 (movable in the X direction shown) includes: a screw 405, a guide tube 406, and a drive bead 408. The screw 405 passes through the cylinder rod 404 and forms a spiral groove. The drive bead 408 is movably embedded in the cylinder rod 404 and part of its structure is located in the spiral groove. The cylinder rod 404 passes through the guide tube 406. The drive bead 408 can roll along the inner wall of the guide tube 406 under the action of the cylinder rod 404 and push the screw 405 to rotate.

[0059] Wherein, the cylinder rod 404 is along the first direction (i.e. Figure 3 The first transmission assembly 4010 is movable in the X direction (as shown). It includes a screw 405, a guide tube 406, and a drive ball 408. The screw 405 is located on the cylinder rod 404. As some embodiments of this application, the cylinder rod 404 has a position along the first direction (i.e., the X direction is movable). Figure 3 A blind hole extending in the X direction (as shown) is provided, and the screw 405 passes through the blind hole of the cylinder rod 404. The screw 405 has a helical groove, which extends in the first direction (i.e., the X direction). Figure 3 Extending in the X direction (as shown), the drive bead 408 is movably embedded in the cylinder rod 404, and part of the drive bead 408 is located in the spiral groove. The cylinder rod 404 passes through the guide tube 406. Under the action of the cylinder rod 404, the drive bead 408 can roll along the inner wall of the guide tube 406 and push the screw 405 to rotate. Specifically, under the action of the second drive cylinder 401, the cylinder rod 404 can rotate within the guide tube 406 in the first direction (i.e., Figure 3 The cylinder rod 404 moves linearly within the X direction (as shown). The movement of the cylinder rod 404 within the guide tube 406 causes the drive ball 408 to roll along the inner wall of the guide tube 406 and push the screw 405 to rotate, thereby converting the linear motion of the second drive cylinder 401 into rotational motion.

[0060] As some embodiments of this application, the first transmission component 4010 is connected to the second transmission component 4020 via a screw 405.

[0061] This configuration allows the linear motion of the second drive cylinder 401 to be converted into rotational motion to drive the wire drawing 323 to rotate. This reduces the torque of the wire drawing 323, lowers the probability of damage to the wire drawing 323 due to excessive torque, and makes the structure of the first transmission component 4010 reasonable, ensuring reliable use and stable force transmission.

[0062] In some embodiments of this utility model, such as Figure 7 and Figure 8As shown, the second transmission assembly 4020 includes: a first connecting shaft 412, a first pulley 413, and a synchronous belt 329. The gun body 300 also includes: a second pulley 315. The first connecting shaft 412 is drivenly connected between the first pulley 413 and the screw 405. The synchronous belt 329 is sleeved on the outside of the first pulley 413 and the second pulley 315 and is drivenly connected to both the first pulley 413 and the second pulley 315. The second pulley 315 is drivenly connected to the wire drawing 323.

[0063] The first connecting shaft 412 is driven between the first pulley 413 and the screw 405. The first connecting shaft 412 and the first pulley 413 are driven together. The way the first connecting shaft 412 and the first pulley 413 are driven together can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the first connecting shaft 412 and the first pulley 413 are driven together by spline connection.

[0064] The first connecting shaft 412 is connected to the screw 405 in a transmission manner. The transmission connection between the first connecting shaft 412 and the screw 405 can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the first connecting shaft 412 and the screw 405 are connected in a transmission manner through spline connection.

[0065] The timing belt 329 is sleeved on the outside of the first pulley 413 and the second pulley 315, and the timing belt 329 is connected to both the first pulley 413 and the second pulley 315. The second pulley 315 is connected to the wire drawing 323. The rotation of the screw 405 can drive the first pulley 413 to rotate. The first pulley 413 drives the second pulley 315 to rotate through the timing belt 329. The rotation of the second pulley 315 can drive the wire drawing 323.

[0066] As some embodiments of this application, the cylinder rod 404, under the action of the second drive cylinder 401, can move along the first direction (i.e., ...) within the guide tube 406. Figure 3 (As shown in the X direction) When the cylinder rod 404 moves inside the guide tube 406, it can cause the drive bead 408 to roll along the inner wall of the guide tube 406 and push the screw 405 to rotate, so as to convert the linear motion of the second drive cylinder 401 into rotational motion. The rotation of the screw 405 can drive the first pulley 413 to rotate. The first pulley 413 can drive the second pulley 315 to rotate through the synchronous belt 329. The rotation of the second pulley 315 can drive the drawing 323 to rotate.

[0067] This configuration allows for a reasonable structure of the second transmission component 4020. The force from the first transmission component 4010 can be transmitted to the wire drawing 323 through the second transmission component 4020 to drive the wire drawing 323 to rotate. Furthermore, this configuration allows the drive mechanism 400 and the gun body 300 to be aligned perpendicular to the first direction (i.e.,...). Figure 3The arrangement of the rivet guns along the X direction (as shown) can shorten the rivet gun A along the first direction (i.e., Figure 3 The length of the rivet gun A (in the X direction as shown) makes the structure compact and easy to use.

[0068] In some embodiments of this utility model, such as Figure 2 , Figure 7 and Figure 8 As shown, the drive mechanism 400 is disposed on the gun housing 301. The connection method between the drive mechanism 400 and the gun housing 301 can be, but is not limited to, welding, bolting, etc. As some embodiments of this application, the drive mechanism 400 and the gun housing 301 are connected by bolting. This arrangement facilitates the assembly of the drive mechanism 400 and the gun housing 301, improves the firmness of the connection between the drive mechanism 400 and the gun housing 301, and allows the gun housing 301 to move along the first direction (i.e., Figure 3 During the movement in the X direction (as shown), the drive mechanism 400 moves together with it, so that the drive mechanism 400 and the wire drawing 323 always maintain a transmission connection.

[0069] In some embodiments of this utility model, such as Figure 7 As shown, the first drive assembly 3001 includes: a drive member 312, a lead screw 302, and a lead nut 313. The drive member 312 is connected to the lead screw 302 for transmission. The lead nut 313 is sleeved on the lead screw 302 and threadedly engaged with the lead screw 302. The lead nut 313 is fixedly connected to the gun housing 301.

[0070] As some embodiments of this application, the drive element 312 is configured as a drive motor.

[0071] The drive component 312 is fixed on the machine body 201 and is connected to the lead screw 302. The drive component 312 and the lead screw 302 can be connected by a spline connection, coupling connection, etc. As some embodiments of this application, the drive component 312 and the lead screw 302 are connected by a coupling.

[0072] The nut 313 is sleeved on the lead screw 302 and threadedly engaged with the lead screw 302. The nut 313 is fixedly connected to the gun housing 301. The nut 313 and the gun housing 301 can be fixedly connected by, but are not limited to, welding, bolt connection, etc. As some embodiments of this application, the nut 313 and the gun housing 301 are fixedly connected by welding.

[0073] It should be noted that the driving component 312 of the first driving assembly 3001 can drive the lead screw 302 to rotate, thereby driving the lead nut 313 along the first direction (i.e. Figure 3 The screw nut 313 moves along the first direction (i.e., the X direction shown), and is fixedly connected to the gun housing 301. Figure 3 The X-direction movement shown can drive the gun casing 301 along the first direction (i.e., Figure 3 Sliding in the X direction (as shown), the gun casing 301 slides along the first direction (i.e., Figure 3 Sliding in the X direction (as shown) can drive the wire drawing 323 along the first direction (i.e. Figure 3 Move in the X direction (as shown).

[0074] This setup allows for precise and stable control of wire drawing 323 along the first direction (i.e. Figure 3 The movement in the X direction (as shown) helps to improve the stability of the riveting force of the rivet gun A, and can reduce the riveting error, which is beneficial to improving the rigidity of the rivet gun A.

[0075] In some embodiments of this utility model, such as Figure 7 As shown, the first drive assembly 3001 also includes: a reducer 311 and a gear pair 332. The drive component 312 is connected to the reducer 311 in a transmission connection, and the gear pair 332 is connected between the reducer 311 and the lead screw 302 in a transmission connection.

[0076] The drive component 312 is connected to the reducer 311 in a transmission connection. The transmission connection between the drive component 312 and the reducer 311 can be, but is not limited to, spline connection, coupling connection, etc. As some embodiments of this application, the drive component 312 and the reducer 311 are connected in a transmission connection via a coupling.

[0077] The gear pair 332 is connected between the reducer 311 and the lead screw 302. As some embodiments of this application, the gear pair 332 includes a driving gear 309 and a driven gear 307. The driving gear 309 is connected to the reducer 311, and the driven gear 307 meshes with the driving gear 309 and is connected to the lead screw 302.

[0078] This configuration allows for precise and stable control and adjustment of the output speed and torque of the drive component 312, which is beneficial for improving the riveting force stability of the rivet gun A and reducing riveting errors. It also helps improve the rigidity of the rivet gun A. Furthermore, this configuration allows the drive component 312, the reducer 311, and the lead screw 302 to move in a direction perpendicular to the first direction (i.e.,...). Figure 3 The arrangement of the rivet guns along the X direction (as shown) can shorten the rivet gun A along the first direction (i.e., Figure 3 The length of the rivet gun A (in the X direction as shown) makes the structure compact and easy to use.

[0079] In some embodiments of this utility model, such as Figure 9As shown, the nut clamp 215 includes two oppositely arranged sub-clamps 2151, which are rotatably disposed on the gun head 205. An elastic member 223 is disposed between the sub-clamps 2151 and the gun head 205 and is used to drive the sub-clamps 2151 to rotate so that the ends of the two sub-clamps 2151 away from the gun head 205 are brought closer to each other, so that the end of the nut clamp 215 away from the gun head 205 is closed.

[0080] The nut clamp 215 includes two sub-clamps 2151, which are positioned opposite each other. An elastic element 223 is located between the nut clamp 215 and the gun head 205. The sub-clamps 2151 are rotatably mounted on the gun head 205. The elastic element 223 drives the sub-clamps 2151 to rotate, causing the ends of the two sub-clamps 2151 furthest from the gun head 205 to move closer together, thus keeping the two sub-clamps 2151 closed. In some embodiments of this application, the gun body 200 includes a feed tube 202, which is located on the body 201 and corresponds to the nut clamp 215, allowing the rivet nut B to enter the nut clamp 215 through the feed tube 202. In some embodiments of this application, the feed tube 202 is connected to an air source, and the rivet nut B enters the nut clamp 215 through the feed tube 202 under the influence of the air source.

[0081] It should be noted that when riveting or bolting is required, the rivet nut B is first inserted into the nut collet 215, and then the first drive assembly 3001 drives the gun housing 301 along the first direction (i.e., Figure 3 The wire drawing 323 moves toward the nut collet 215 in the X direction (as shown), thereby being pushed along the first direction (i.e., the wire drawing 323 is driven by the first drive assembly 3001) in the first direction (i.e., the wire drawing 323 is driven along the first direction). Figure 3 As shown in the X direction, the wire puller 323 moves toward the nut clamp 215. The wire puller 323 can push open the feed tube 202 and continue to move forward after contacting the rivet nut B. At this time, the nut clamp 215 is under force, and the ends of the two sub-clamps 2151 away from the gun head 205 move away from each other to keep the two sub-clamps 2151 slightly open. Then, the drive mechanism 400 drives the wire puller 323 to rotate. Under the action of the nut clamp 215, the wire puller 323 screws into the rivet nut B while the rivet nut B moves toward the wire puller 323, and the nut clamp 215 closes.

[0082] By including two sub-clamps 2151 in the nut clamp 215, and enabling the two sub-clamps 2151 to close under the action of the elastic member 223, it is easier to make the rivet nut B threadedly engage with the wire 323, which can reduce the risk of thread wear of the wire 323 and the rivet nut B, and improve the reliability of the rivet gun A. In addition, the rivet gun A proposed in this application has a high degree of automation, which is conducive to improving production efficiency.

[0083] In some embodiments of this utility model, such as Figure 4 As shown, the gun body 200 also includes: a fixing member 2046, which is located on the body 201, the gun head 205 is located on the fixing member 2046, and part of the nail feeding tube 202 is located inside the fixing member 2046.

[0084] Among them, along the first direction (i.e. Figure 3 (As shown in the X direction), the fixing member 2046 is located at one end of the body 201 near the gun head 205, and the gun head 205 is located on the fixing member 2046. As some embodiments of this application, the gun body 200 also includes: a locking nut 207, a fixing sleeve 208, a retaining sleeve 209, a reset ball 210, a reset spring 211, a guide post 212, and a retaining spring 213. Part of the structure of the nail feeding tube 202 is located on the fixing sleeve 208 and on the fixing member 2046 under the action of the reset ball 210, the reset spring 211, the guide post 212, and the retaining spring 213. Another part of the structure of the nail feeding tube 202 is located on the fixing sleeve 208 through the locking nut 207 and the retaining sleeve 209.

[0085] As some embodiments of this application, the fastener 2046 includes a first connecting block 204 and a fixing block 206, along a first direction (i.e., Figure 3 (in the X direction shown), the first connecting block 204 and the fixing block 206 are assembled at the front end of the body 201, and the gun head 205 is located between the first connecting block 204 and the fixing block 206.

[0086] This design facilitates the fixing of the gun body 200 and the rivet feeding tube 202, which helps to improve the reliability and stability of the rivet gun A.

[0087] In some embodiments of this utility model, such as Figure 9 As shown, the sub-clamp head 2151 includes: a connecting portion 21511 and a limiting portion 21512. The connecting portion 21511 is rotatably disposed on the gun head 205, connected to and rotatably disposed on the limiting portion 21512. The limiting portion 21512 defines a receiving cavity 2155. The receiving cavities 2155 of the two limiting portions 21512 are connected and face each other. The inner wall surface of the receiving cavity 2155 includes: a first guide surface 2152, a polygonal surface 2153, and a second guide surface 2154, along a first direction (i.e., Figure 3 (As shown in the X direction), the polygonal surface 2153 is connected between the first guide surface 2152 and the second guide surface 2154, and from the end of the first guide surface 2152 near the connecting part 21511 to the end away from the connecting part 21511, the first guide surface 2152 and the second guide surface 2154 gradually approach the center line of the nut head 215.

[0088] In this embodiment, the connecting part 21511 and the limiting part 21512 are connected and disposed. As some embodiments of this application, the connecting part 21511 and the limiting part 21512 are integrally formed. The connecting part 21511 is rotatably disposed on the gun head 205. The rotatable connection between the connecting part 21511 and the gun head 205 can be, but is not limited to, shaft hole connection. As some embodiments of this application, the connecting part 21511 has a pivot hole 2181, and the nut clip 215 has a pivot shaft 218. The pivot hole 2181 and the pivot shaft 218 cooperate with each other to make the connecting part 21511 rotatably disposed on the gun head 205.

[0089] The limiting portion 21512 defines the receiving cavity 2155. The receiving cavities 2155 of the limiting portions 21512 of the two sub-clamp heads 2151 are connected, and the limiting portions 21512 of the two sub-clamp heads 2151 are arranged facing each other. The inner wall surface of the receiving cavity 2155 includes a first guide surface 2152, a polygonal surface 2153, and a second guide surface 2154, along a first direction (i.e. Figure 3 (As shown in the X direction), polygonal surface 2153 connects the first guide surface 2152 and the second guide surface 2154. From the end of the first guide surface 2152 near the connecting portion 21511 to the end away from the connecting portion 21511, both the first guide surface 2152 and the second guide surface 2154 gradually approach the centerline of the nut head 215. That is, the first guide surface 2152 has one end near the connecting portion 21511 and one end away from the connecting portion 21511, along the first direction (i.e.,...). Figure 3 (As shown in the X direction) and from the end of the first guide surface 2152 near the connecting part 21511 to the end away from the connecting part 21511, the first guide surface 2152, the polygonal surface 2153, and the second guide surface 2154 are arranged in sequence and connected, and the first guide surface 2152 and the second guide surface 2154 gradually approach the center line of the nut head 215.

[0090] By setting the first guide surface 2152, the polygonal surface 2153, and the second guide surface 2154, the nut clamp 215 can guide the rivet nut B, enabling the rivet nut B to automatically center. Furthermore, the polygonal surface 2153 can reduce the probability of the rivet nut B rotating within the nut clamp 215, ensuring a precise fit between the rivet nut B and the nut clamp 215. By gradually bringing the first guide surface 2152 and the second guide surface 2154 closer to the centerline of the nut clamp 215, when the elastic element 223 drives the sub-clamps 2151 to rotate, so that the ends of the two sub-clamps 2151 that are away from the gun head 205 are relatively close, the rivet nut B can be pushed along the centerline of the nut clamp 215, guided by the inclined surfaces of the first guide surface 2152 and the second guide surface 2154. This significantly improves the accuracy of the fit between the wire drawing 323 and the rivet nut B.

[0091] In some embodiments of this utility model, such as Figure 6 and Figure 9 As shown, the gun body 200 also includes: a first sensor 224, wherein a connecting portion 21511 of a sub-clamp head 2151 defines a mounting hole 222 communicating with a receiving cavity 2155, the first sensor 224 passes through the mounting hole 222 and part of its structure is located inside the receiving cavity 2155, and the first sensor 224 is used to detect whether there is a rivet nut B inside the receiving cavity 2155.

[0092] Among them, one of the two sub-clamp heads 2151 defines a mounting hole 222 that communicates with the receiving cavity 2155. The first sensor 224 passes through the mounting hole 222, and part of the structure of the first sensor 224 is located inside the receiving cavity 2155. The first sensor 224 is used to detect whether there is a rivet nut B inside the receiving cavity 2155.

[0093] As some embodiments of this application, such as Figure 4 As shown, the gun body 200 also includes: a clamping block 216 and a second connecting block 217. The first sensor 224 is fixed to the clamping block 216 and is fixed to the mounting hole 222 communicating with the receiving cavity 2155 through the second connecting block 217.

[0094] This configuration facilitates the installation of the first sensor 224 and the detection of whether there is a rivet nut B in the receiving cavity 2155, thereby facilitating the automated control of the rivet gun A and significantly improving the automation level of the rivet gun A.

[0095] As some embodiments of this application, such as Figure 3 As shown, the gun holder 100 also includes: a second sensor 102, a first pressure regulating valve 104, a first linear guide rail 105, a first multi-way valve 106, a second linear guide rail 107, a first limiting block 108, a third sensor 109, a second multi-way valve 110, and a second pressure regulating valve 111. As some embodiments of this application, part of the structure of the holder body 101 is a flange, which can be connected to the flange of the robot controlling the movement of the rivet gun A. The second sensor 102 and the third sensor 109 are both located in the gun holder 100. The second sensor is used to detect whether the workpiece C is in contact with the gun head 205, and the third sensor is used to detect whether the first drive cylinder 103 is compressed. The first limiting block 108 is located in the gun holder 100 and is used to limit the maximum travel of the gun body 200.

[0096] As some embodiments of this application, such as Figure 3 As shown, the first multi-way valve 106 and the second multi-way valve 110 are along the second direction (i.e. Figure 3 The first pressure regulating valve 104 and the second pressure regulating valve 111 are located on both sides of the gun base 100 in the Y direction (as shown). Figure 3(As shown in the X direction) are located on both sides of the gun base 100. The first multi-way valve 106 and the first pressure regulating valve 104 are used to control the drive of the first drive cylinder 103. The second multi-way valve 110 and the second pressure regulating valve 111 are used to drive the wire drawing 323 to rotate.

[0097] As some embodiments of this application, such as Figure 4 As shown, the gun body 200 also includes: a third linear guide rail 203, an end cap 219, a bearing seat 220, and a second limiting block 221. The gun body 200 is mounted on the first linear guide rail 105 and the second linear guide rail 107, and the third linear guide rail 203 is mounted on the upper surface of the gun body 200. Along the first direction (i.e....) Figure 3 (As shown in the X direction), the bearing housing 220 is located at the end of the machine body 201 away from the gun head 205 and is used to fix the lead screw 302. The end cover 219 is bolted to the bearing housing 220. The second limiting block 221 is located on the machine body 201.

[0098] As some embodiments of this application, such as Figure 7 As shown, the gun body 300 also includes: a first drive shaft 316, a fourth bearing 317, a fourth sensor 318, a fifth sensor 319, a spring 321, a pull rod 322, an anti-rotation pin 324, an anti-rotation screw 325, a cover plate 326, a first bearing 327, a pad 328, a third retaining ring 330, and a bushing 331.

[0099] As some embodiments of this application, such as Figure 7 As shown, the first drive assembly 3001 further includes: a first spacer 303, a thrust bearing 304, a second spacer 305, a second bearing 306, a first retaining ring 308, a second retaining ring 310, and a third bearing 314. The third bearing 314 is located at the end of the lead screw 302 near the gun head 205, and is fitted with the bushing 331. The gun housing 301 is mounted on the third linear guide 203. The first retaining ring 308 is used to fix the driven gear 307, and the second retaining ring 310 is used to fix the driving gear 309.

[0100] The first spacer 303 is mounted on the lead screw 302. On the side of the first spacer 303 away from the gun head 205, the thrust bearing 304, the second spacer 305, the second bearing 306, the driven gear 307, and the first retaining ring 308 are sequentially assembled. The thrust bearing 304 and the second bearing 306 are simultaneously assembled with the body 201 in the gun body 200.

[0101] Along the first direction (i.e.) Figure 3(In the X direction shown) The first bearing 327 is mounted on the gun housing 301 and pressed by the cover plate 326. The pull rod 322 is rotatably mounted on the gun housing 301. The spring 321 is mounted on the pull rod 322. The anti-rotation pin 324 compresses the spring 321. The anti-rotation screw 325 is located inside the anti-rotation pin 324. The wire 323 is threadedly engaged with the pull rod 322. The fifth sensor 319 is located on the pull rod 322. The first drive shaft 316 is located inside the gun housing 301 and is connected to the pull rod 322. The fourth bearing 317 is assembled with the first drive shaft 316. A pad 328 is provided on the side of the first drive shaft 316 near the gun head 205. The second pulley 315 is located on the side of the first drive shaft 316 away from the gun head 205 and is fixed and pressed by the third retaining ring 330. The fourth sensor 318 is located on the gun housing 301. The fourth sensor 318 is used to detect the initial state of the drive mechanism 400, and the fifth sensor 319 is used to detect the magnitude of the riveting force.

[0102] As some embodiments of this application, such as Figure 8 As shown, the drive mechanism 400 also includes: a connecting plate 402, a support 403, a housing 407, a fixed seat 409, a fifth bearing 410, a pressure plate 411, a retaining ring 414, and a protective cover 415. The drive mechanism 400 is mainly based on the housing 407 and is fixed to the gun case 301 in the gun body 300 through the connecting plate 402, the support 403, and the fixed seat 409 connected to the housing 407. The first connecting shaft 412 cooperates with the fifth bearing 410 and is connected to the first pulley 413 and the screw 405 for transmission.

[0103] The pressure plate 411 presses the first connecting shaft 412 onto the housing 407, and the retaining ring 414 presses the first pulley 413 onto the first connecting shaft 412. The rear end of the first connecting shaft 412 is hinged to the screw 405. The protective cover 415 is installed on the outside of the first pulley 413 and is fixed to the housing 407 and the fixed base 409 to protect the first pulley 413 and other rotating exposed components such as the timing belt 329.

[0104] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0105] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0106] In the description of this utility model, "multiple" means two or more.

[0107] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0108] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0110] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rivet gun (A), characterized in that, include: Gun mount (100), the gun mount (100) includes: a mount body (101) and a first drive cylinder (103), the first drive cylinder (103) being disposed on the mount body (101); The gun body (200) includes: a body (201), a gun head (205), a nut clip (215), and an elastic element (223). The body (201) is disposed on the base body (101). The first drive cylinder (103) is used to drive the body (201) to slide along a first direction. The gun head (205) is disposed on the body (201). The nut clip (215) is movably disposed on the gun head (205). The elastic element (223) is disposed between the nut clip (215) and the gun head (205) and is used to drive the end of the nut clip (215) away from the gun head (205) to close. Gun body (300), the gun body (300) is disposed on the body (201) and includes: a first drive assembly (3001), a gun shell (301), and a wire (323). The gun shell (301) is slidably disposed on the body (201). The first drive assembly (3001) is disposed on the body (201). The first drive assembly (3001) is used to drive the gun shell (301) to slide along the first direction. The wire (323) is rotatably disposed on the gun shell (301) and passes through the nut clip (215). A drive mechanism (400) is used to drive the wire drawing (323) to rotate.

2. The rivet gun (A) according to claim 1, characterized in that, The drive mechanism (400) includes: a second drive cylinder (401), a first transmission assembly (4010), and a second transmission assembly (4020). The second drive cylinder (401) is connected to the first transmission assembly (4010) in a transmission manner. The second transmission assembly (4020) is connected between the first transmission assembly (4010) and the wire drawing (323). The first transmission assembly (4010) is configured to convert the linear motion of the second drive cylinder (401) into rotational motion and output it to the second transmission assembly (4020).

3. The rivet gun (A) according to claim 2, characterized in that, The second drive cylinder (401) has a cylinder rod (404) that is movable along the first direction. The first transmission assembly (4010) includes a screw (405), a guide tube (406), and a drive ball (408). The screw (405) passes through the cylinder rod (404) and forms a spiral groove. The drive ball (408) is movably embedded in the cylinder rod (404) and has a portion of its structure in the spiral groove. The cylinder rod (404) passes through the guide tube (406). The drive ball (408) can roll along the inner wall of the guide tube (406) and push the screw (405) to rotate under the action of the cylinder rod (404).

4. The rivet gun (A) according to claim 3, characterized in that, The second transmission assembly (4020) includes: a first connecting shaft (412), a first pulley (413), and a timing belt (329). The gun body (300) further includes: a second pulley (315). The first connecting shaft (412) is driven between the first pulley (413) and the screw (405). The timing belt (329) is sleeved on the outside of the first pulley (413) and the second pulley (315) and is drivenly connected to both the first pulley (413) and the second pulley (315). The second pulley (315) is drivenly connected to the wire drawing (323).

5. The rivet gun (A) according to claim 1, characterized in that, The drive mechanism (400) is located on the gun casing (301).

6. The rivet gun (A) according to claim 1, characterized in that, The first drive assembly (3001) includes: a drive member (312), a lead screw (302), and a lead screw nut (313). The drive member (312) is connected to the lead screw (302) in a transmission manner. The lead screw nut (313) is sleeved on the lead screw (302) and threadedly engaged with the lead screw (302). The lead screw nut (313) is fixedly connected to the gun shell (301).

7. The rivet gun (A) according to claim 6, characterized in that, The first drive assembly (3001) further includes: a reducer (311) and a gear pair (332). The drive component (312) is connected to the reducer (311) in a transmission connection, and the gear pair (332) is connected between the reducer (311) and the lead screw (302) in a transmission connection.

8. The rivet gun (A) according to claim 1, characterized in that, The nut clamp (215) includes two oppositely arranged sub-clamps (2151), the sub-clamps (2151) being rotatably disposed on the gun head (205), and the elastic member (223) being disposed between the sub-clamps (2151) and the gun head (205) and used to drive the sub-clamps (2151) to rotate, so that the ends of the two sub-clamps (2151) away from the gun head (205) are brought closer to each other, so that the end of the nut clamp (215) away from the gun head (205) is closed.

9. The rivet gun (A) according to claim 8, characterized in that, The sub-clamp head (2151) includes: a connecting part (21511) and a limiting part (21512). The connecting part (21511) is rotatably disposed on the gun head (205) and connected to the limiting part (21512). The limiting part (21512) defines a receiving cavity (2155). The receiving cavities (2155) of the two limiting parts (21512) are connected and face each other. The inner wall surface of the receiving cavity (2155) includes: a first guide surface (2152) and a polygonal surface (…). 2153) and second guide surface (2154), along the first direction, the polygonal surface (2153) is connected between the first guide surface (2152) and the second guide surface (2154), and from the end of the first guide surface (2152) near the connecting part (21511) to the end away from the connecting part (21511), the first guide surface (2152) and the second guide surface (2154) gradually approach the center line of the nut head (215).

10. The rivet gun (A) according to claim 9, characterized in that, The gun body (200) further includes: a first sensor (224), wherein a connecting portion (21511) of one of the sub-clamp heads (2151) defines a mounting hole (222) communicating with the receiving cavity (2155), the first sensor (224) is inserted through the mounting hole (222) and part of its structure is located in the receiving cavity (2155), the first sensor (224) is used to detect whether there is a rivet nut in the receiving cavity (2155).

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