Gun head of tightening gun

Abstract

The utility model discloses a gun head of a tightening gun. The gun head comprises a nail feeding assembly. The nail feeding assembly comprises a cutter bar guide groove, a guide pipe, a telescopic pipe, a spring and a supporting block. The guide pipe can abut against the telescopic pipe, and the telescopic pipe can be communicated with the cutter bar guide groove. One end of the spring is detachably contained in the telescopic pipe, and the other end of the spring is detachably installed on the supporting block. The tightening gun comprises a cutter bar, and the cutter bar is movably contained in the cutter bar guide groove. When the cutter bar moves downwards, the telescopic pipe is in a stressed state, and the telescopic pipe withdraws from the cutter bar guide groove and compresses the spring after bearing the downward pressure of the cutter bar; when the cutter bar moves upwards, the telescopic pipe is in an unstressed state, and the restoring force of the spring drives the telescopic pipe to enter the cutter bar guide groove. The utility model has a simpler structure and is convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the field of FDS flow drill screw tightening, in particular to a tightening gun head. Background Art

[0002] With the widespread use of aluminum alloy materials in vehicle bodies, the proportion of aluminum alloy profiles and castings continues to increase. Bilateral connection processes such as spot welding and SPR are no longer sufficient for connecting tubular closed structures such as sheet metal and profiles. In existing technologies, the battery pack housing and cover plate are connected by creating sealing grooves around the battery pack housing, drilling threaded holes, drilling threaded holes in the cover plate, placing sealing rings in the sealing grooves around the housing, placing the cover plate on the battery pack housing, and finally tightening screws through the threaded holes.

[0003] Currently, the gun head of a typical tightening gun uses a small air cylinder to push a push rod, which pushes the screw from the feed pipe into the groove formed by the jaw block of the pressure claw to facilitate the engagement of the knife bar. However, the existing gun head structure is complicated and it is inconvenient to disassemble the gun head when the nail is stuck or re-nailed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a tightening gun head; the tightening gun head has a simpler structure and is easy to disassemble.

[0005] The utility model is achieved through the following technical solutions:

[0006] A tightening gun head includes a nail feeding assembly, which includes a knife bar guide groove, a guide tube, a telescopic tube, a spring and a support block. The guide tube can abut the telescopic tube, and the telescopic tube can be connected to the knife bar guide groove. One end of the spring is detachably accommodated in the telescopic tube, and the other end is detachably mounted on the support block. The tightening gun includes a knife bar, and the knife bar is movably accommodated in the knife bar guide groove. When the knife bar moves downward, the telescopic tube is in a stressed state. After receiving the downward pressure of the knife bar, the telescopic tube exits the knife bar guide groove and compresses the spring; when the knife bar moves upward, the telescopic tube is in an unstressed state, and the restoring force of the spring drives the telescopic tube into the knife bar guide groove.

[0007] Furthermore, a fourth groove is provided on the knife rod guide groove, and one end of the telescopic tube is movably accommodated in the fourth groove.

[0008] Furthermore, a sixth through hole is formed on the inner wall of the fourth groove, and the end portion of the telescopic tube is accommodated in the sixth through hole.

[0009] Furthermore, the telescopic tube includes a first end and a second end. In an unstressed state, the first end is located in the knife rod guide groove, the second end abuts against the edge of the sixth through hole, and the telescopic tube is connected to the knife rod guide groove.

[0010] Furthermore, under the force state, the first end portion abuts against the knife rod, and the second end portion is staggered with the edge of the sixth through hole.

[0011] Furthermore, in an unstressed state, the edge of the telescopic tube abuts against the edge of the conduit, and the telescopic tube is connected to the conduit.

[0012] Furthermore, under stress, the edge of the telescopic tube is offset from the edge of the conduit.

[0013] Furthermore, a countersunk hole is provided on the telescopic tube, and one end of the spring is received in the countersunk hole.

[0014] Furthermore, the nail feeding assembly also includes a fifth connecting plate, and the support block is detachably mounted on the fifth connecting plate.

[0015] Furthermore, the knife rod guide groove is also fixedly connected with a pressure plate, which is a circular ring structure.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. When the telescopic tube is under stress, it exits the cutter bar guide groove through the downward pressure of the cutter bar, preventing the screw nails from entering and causing the nail to get stuck, and the structure is simple.

[0018] 2. When the telescopic tube is not under stress, it is driven by the restoring force of the spring to extend into the knife rod guide groove, thereby achieving conduction among the guide tube, the telescopic tube and the knife rod guide groove, which is convenient for feeding and has a simple structure.

[0019] 2. One end of the spring is detachably housed in the telescopic tube, and the other end is detachably mounted on the support block, so that when a pin is stuck, it is easy to disassemble.

[0020] 3. By setting a ring-shaped pressure plate, the contact area is increased, the force is more evenly distributed, and the occurrence of indentations is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional assembly diagram of a tightening gun according to an embodiment of the present invention;

[0022] Figure 2 A partial assembly diagram of a tightening gun according to an embodiment of the present invention;

[0023] Figure 3 A partial exploded view of a tightening gun according to an embodiment of the present invention;

[0024] Figure 4 This is a partial assembly diagram of a feeding device and a pressing device according to an embodiment of the present invention;

[0025] Figure 5 Another partial assembly diagram of the feeding device and the pressing device according to one embodiment of the utility model;

[0026] Figure 6 This is an exploded view of a cutter bar assembly according to an embodiment of the present invention;

[0027] Figure 7 This is a three-dimensional assembly diagram of a pressing device according to an embodiment of the present invention;

[0028] Figure 8 This is a three-dimensional assembly diagram of a nail feeding assembly according to an embodiment of the present invention;

[0029] Figure 9 This is an exploded view of a nail feeding assembly according to an embodiment of the present invention;

[0030] Figure 10 This is a cross-sectional view of a nail feeding assembly according to an embodiment of the present invention;

[0031] Figure 11 This is a three-dimensional assembly diagram of a feeding device according to an embodiment of the present invention;

[0032] Figure 12 This is a partial assembly diagram of a fourth sensor according to an embodiment of the present invention;

[0033] Figure 13 This is a circuit diagram of a tightening gun head according to an embodiment of the present invention.

[0034] Explanation of reference numerals: 1. Power device; 10. Motor; 100. Servo controller; 11. Screw shaft; 2. Feed device; 20. First cylinder; 200. First piston rod; 21. Tool bar bracket; 210. First support plate; 211. Second support plate; 22. Tool bar assembly; 220. Tool bar; 221. Quick-change bushing; 222. First sensor; 223. Tool head; 224. Guide tube; 225. Quick-change head; 23. Fourth cylinder; 230. Fourth piston rod; 24. First sliding assembly; 240. First guide column; 241. First slider; 25. First 1. Connecting plate; 3. Clamping device; 30. Second cylinder; 300. Second piston rod; 32. Second sliding assembly; 320. Second guide post; 321. Second slider; 322. Third slider; 33. Stop bolt; 330. Bracket; 340. Second connecting plate; 341. First boss; 342. Third connecting plate; 343. First groove; 35. First connecting block; 350. Second boss; 354. Fifth through hole; 36. Fourth connecting plate; 37. Fifth connecting plate; 370. Third groove; 4. Feeding device; 40. Feeding pipe; 41. Connecting pipe 410, blind hole; 42, third sensor; 420, eighth connecting plate; 43, third cylinder; 430, third piston rod; 44, seventh connecting plate; 5, nail feed assembly; 50, screw nail; 51, pressure plate; 52, pressure jaw; 520, second groove; 53, knife bar guide groove; 530, sixth connecting plate; 531, third boss; 533, sixth through hole; 54, clamping jaw arm; 55, pneumatic clamp; 550, second connecting block; 56, guide tube; 57, second sensor; 58, telescopic tube; 580, fixing pin; 581, spring; 582 , support block; 583, countersunk hole; 60, controller; 61, switch; 62, remote module; 621, first proximity switch; 622, second proximity switch; 623, third proximity switch; 624, fourth proximity switch; 625, fifth proximity switch; 626, first analog module; 267, second analog module; 63, host computer; 7, valve island; 8, fixing assembly; 80, first fixing plate; 800, first through hole; 801, second through hole; 802, third through hole; 81, second fixing plate; 82, third fixing plate; 9, fourth sensor. DETAILED DESCRIPTION

[0035] The following is a further non-restrictive detailed description of the technical solution of the utility model in conjunction with the preferred embodiments and the accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model.

[0036] like Figure 1 As shown, a tightening gun according to an embodiment of the present invention includes a fixing assembly 8 and a power device 1, a feeding device 2, a pressing device 3 and a feeding device 4 respectively fixedly connected to the fixing assembly 8.

[0037] like Figure 2 and Figure 3 As shown, the power device 1 includes a motor 10 and a screw shaft 11, and the fixing assembly 8 includes a first fixing plate 80; the bottom of the motor 10 is fixedly connected to the first fixing plate 80 by screws, and a first through hole 800 is opened on the first fixing plate 80, and the motor 10 passes through the first through hole 800 and is fixedly connected to the screw shaft 11 through a coupling.

[0038] The feeding device 2 includes a first cylinder 20, a first support plate 210 and a first sliding assembly 24. Among them, a first proximity switch 621 for detecting the movement stroke is installed on the first cylinder 20, and a fourth proximity switch 624 for detecting the movement stroke is installed on the fourth cylinder 23. The first support plate 210 is connected to the first cylinder 20 and is fixedly connected to the fourth cylinder 23 and the tool rod bracket 21. The first cylinder 20 is located above the fourth cylinder 23. Specifically, the bottom of the first cylinder 20 is fixedly connected to the first fixing plate 80 by screws; the first piston rod 200 of the first cylinder 20 passes through the second through hole 801 opened in the first fixing plate 80, and is fixedly connected to the first connecting plate 25 by screws. The tool rod bracket 21 includes a first support plate 210 and a pair of second support plates 211. The two ends of the first support plate 210 are fixedly connected to the second support plate 211 by screws respectively; the upper surface of the first support plate 210 is fixedly connected to the first connecting plate 25 by screws, and the lower surface of the first support plate 210 is fixedly connected to the fourth cylinder 23 by screws, and the structure is more compact.

[0039] The first sliding assembly 24 includes a pair of first guide posts 240 and a first slider 241 slidably connected to the first guide posts 240. The fixing assembly 8 also includes a second fixing plate 81 and a third fixing plate 82. The pair of first guide posts 240 are symmetrically arranged on either side of the first cylinder 20 and are fixedly connected to the second fixing plate 81 and the third fixing plate 82 respectively by screws. The first slider 241 is fixedly connected to the second support plate 211 by screws.

[0040] like Figure 4 As shown, the feed device 2 also includes a tool bar assembly 22 fixedly connected to the tool bar bracket 21. The tool bar assembly 22 is arranged below the power device and includes a tool bar 220, a quick-change bushing 221 and a first sensor 222. Corresponding to the preferred embodiment of the present utility model, the first sensor 222 is preferably a torque sensor. The tool bar 220 includes a cutter head 223, a guide sleeve 224 and a quick-change head 225; the quick-change head 225 is matched with the quick-change bushing 221; the bottom connector 226 of the first sensor 222 is provided with an external thread 227, and the external thread 227 is matched with the internal thread 228 of the quick-change bushing 222. The first sensor 222 is fixedly connected to the second support plate 211 by screws on both sides. The quick-change head 225 is adapted to the quick-change bushing 221. By simply replacing the tool bar 220 of different specifications with the same quick-change head 225, different models of threaded nails 50 can be processed, which is convenient, fast and highly adaptable.

[0041] like Figures 5 to 8As shown, the pressing device 3 includes a second cylinder 30, a nail feeding assembly 5, a third connecting plate 342, and a second sliding assembly 32. A second proximity switch 622 for detecting the movement stroke is mounted on the second cylinder 30. The third connecting plate 342 is connected to the second cylinder 30 and is also fixedly connected to the second sliding assembly 32. Specifically, the upper surface of the second cylinder 30 is fixedly connected to the first fixing plate 80 via screws. The second cylinder 30 includes a second piston rod 300. The second connecting plate 340 is sleeved on the second piston rod 300. The first boss 341 of the second connecting plate 340 is engaged with the first groove 343 of the third connecting plate 342.

[0042] The second sliding assembly 32 includes a pair of second guide posts 320, and a second slider 321 and a third slider 322 slidably connected to the second guide posts 320. The second guide posts 320 are symmetrically positioned on either side of the second cylinder 30 and are fixedly connected to the second fixing plate 81 and the third fixing plate 82, respectively, via screws. The arbor support 21 is fixedly connected to both the first sliding assembly 24 and the second sliding assembly 32. Specifically, the second support plate 211 is fixedly connected to both the first slider 241 and the second slider 321 via screws. The third slider 322 is located below the second slider 321 and is fixedly connected to the third connecting plate 342 via screws.

[0043] The nail feeding assembly 5 is fixedly connected to one side of the third connecting plate 342, and the fourth cylinder 23 is arranged on the other side of the third connecting plate 342. The front surface of the third connecting plate 342 is fixedly connected to the first connecting block 35 by screws. The nail feeding assembly 35 is fixedly connected to the first connecting plate 35. The clamping device 3 also includes a stop bolt 33, which is fixedly connected to the third connecting plate 342. Specifically, the stop bolt 33 is fixedly connected to the bracket 330 by screws, and the bracket 330 is fixedly connected to the rear surface of the third connecting plate 342 by screws. The fourth cylinder 23 includes a fourth piston rod 230. The fourth cylinder 23 is located above the stop bolt 33 and the fourth piston rod 230 is aligned with the stop bolt 33 in the vertical direction, which is used to ensure that the main stroke of the tool rod 220 after engaging with the screw 50 and the feed of the tool rod 220 are synchronized.

[0044] The first cylinder 20 and the second cylinder 30 are located between the first sliding assembly 24 and the second sliding assembly 32 and are close to the center of mass M of the tightening gun. By arranging the first cylinder 20, the second cylinder 30, and the fourth cylinder 23 in the middle of the tightening gun and placing the center of mass M of the tightening gun close to the screw feed assembly 5 of the gun head, the workpiece is subjected to a relatively uniform force during operation.

[0045] The nail feeding assembly 5 includes a threaded nail 50, a clamping jaw 52, a clamping arm 54, a pneumatic clamp 55, and a second sensor 57. The front surface 351 of the second boss 350 of the first connecting block 35 is fixedly connected to the pneumatic clamp 55 by screws. A fifth proximity switch 625 for detecting the movement stroke is mounted on the pneumatic clamp 55. The pneumatic clamp 55 includes a second connecting block 550, the clamping arms 54 are symmetrically arranged on both sides of the pneumatic clamp 55 and fixedly connected to the second connecting block 550 by screws, the surface of the pneumatic clamp 55 is fixedly connected to the fourth connecting plate 36 by screws, and the second sensor 57 is symmetrically arranged on both sides of the pneumatic clamp 55 and fixedly connected to the fourth connecting plate 36 by screws. The second sensor 57 is located directly above the clamping arm 54. The clamping arm 54 is fixedly connected to the clamping jaw 52 by screws. A second groove 520 is provided on the clamping jaw 52. The second groove 520 forms a tapered hole for placing the threaded nail 50. The texture 500 of the threaded nail 50 is adapted to the inner texture 229 of the cutter head 223, and the cutter head 223 engages with the threaded nail 50.

[0046] The nail feed assembly 5 is arranged below the tool rod assembly 22 and also includes a pressure plate 51 and a tool rod guide groove 53, and the clamping arms 54 are symmetrically arranged on both sides of the tool rod guide groove 53. The tool rod 220 is clearance-matched with the tool rod guide groove 53 and slides in the tool rod guide groove 53. The tool rod guide groove 53 includes a sixth connecting plate 530, and a third boss 531 is provided on the sixth connecting plate 530. The side of the second boss 350 is fixedly connected to the fifth connecting plate 36 by screws, and a third groove 370 is provided on the fifth connecting plate 37. The third boss 531 abuts against the third groove 360, and the sixth connecting plate 530 is fixedly connected to the fifth connecting plate 37 by screws. The pressure plate 51 is fixedly connected to the bottom 532 of the sixth connecting plate 530 by screws, and the pressure plate 51 is preferably a circular ring structure, which has a larger contact area with the surface to be processed and a more uniform force.

[0047] The nail feeding assembly 5 also includes a guide tube 56, a telescopic tube 58, a spring 581 and a support block 582. The guide tube 56 can abut against the telescopic tube 58, and the telescopic tube 58 can be connected to the knife bar guide groove 53. One end of the spring 581 is detachably accommodated in the telescopic tube 58, and the other end is detachably mounted on the support block 582. The knife bar 220 is movably accommodated in the knife bar guide groove 23. When the knife bar 220 moves downward, the telescopic tube 58 is in a stressed state. After receiving the downward pressure of the knife bar 220, the telescopic tube 58 withdraws from the knife bar guide groove 53 and compresses the spring 581; when the knife bar moves upward, the telescopic tube 58 is in an unstressed state, and the restoring force of the spring 581 drives the telescopic tube 58 into the knife bar guide groove 53.

[0048] Specifically, the first connecting block 35 defines a fifth through-hole 354, through which the conduit 56 passes to connect with the telescopic tube 581. The sixth connecting plate 530 defines a fourth groove 532, and a sixth through-hole 533 is defined on the inner wall of the fourth groove 532. One end of the telescopic tube 58 is movably received within the sixth through-hole, and the telescopic tube 580 is fixedly connected to the fifth connecting plate 37 via a fixing pin 580. The telescopic tube 58 also defines a counterbore 583. One end of a spring 581 is detachably received within the counterbore 583, while the other end is detachably mounted within the support block 582. The support block 582 is detachably fixedly connected to the fifth connecting plate 37 via screws, resulting in a simple structure and easy disassembly.

[0049] The telescopic tube 58 includes a first end 584 and a second end 585. In the unstressed state, the first end 584 is located in the knife bar guide groove 53, and the second end 585 abuts the edge of the sixth through hole 533, and the telescopic tube 58 is connected to the knife bar guide groove 53. The edge of the telescopic tube 58 abuts the edge of the conduit 56, and the telescopic tube 58 is connected to the conduit 56. The screw 50 passes through the conduit 56 and enters the bottom of the knife bar guide groove 53 from the telescopic tube 581, and finally reaches the second groove 520 of the clamping jaw 52. In the stressed state, the first end 584 abuts the knife bar 220, and the second end 585 is offset from the edge of the sixth through hole 533. The edge of the telescopic tube 58 is offset from the edge of the conduit 56.

[0050] like Figure 9 As shown, the feeding device 4 includes a feeding pipe 40, a connecting pipe 41, a third sensor 42 and a third cylinder 43. The feeding pipe 40 is connected to an external feeder (not shown in the figure). A seventh connecting plate 44 is sleeved on the feeding pipe 40, and a third through hole 802 is provided on the first fixed plate 80. The feeding pipe 40 passes through the third through hole 802, and the seventh connecting plate 44 is fixedly connected to the first fixed plate 80 by screws. The connecting pipe 41 is sleeved on the feeding pipe 40 and fixedly connected to the third cylinder 43 by screws. A blind hole 410 is provided on the connecting pipe 41, and the blind hole 410 is matched with the third piston rod 430 of the third cylinder 43, and the third piston rod 430 can slide in the blind hole 410. The third sensor 42 is sleeved on the feeding pipe 40 and fixedly connected to the eighth connecting plate 420 by screws. The eighth connecting plate 420 is fixedly connected to the cylinder body 431 of the third cylinder 43 by screws. Corresponding to the preferred embodiment of the present invention, the third sensor 42 is preferably an inductive sensor.

[0051] like Figure 10As shown, a tightening gun head of an embodiment of the present invention further includes a fourth sensor 9, a controller 60, a switch 61 and a valve island 7. Corresponding to a preferred embodiment of the present invention, the fourth sensor 9 is preferably a displacement sensor. The fourth sensor 9 is fixedly connected to the second support plate 211 by screws, the valve island 7 is fixedly connected to the third fixed plate 82 by screws, and the controller 60 and the switch 61 are arranged in an electrical cabinet (not shown in the figure). The valve island 7 adopts the existing technology, so its specific structure is not described here. Corresponding to a preferred embodiment of the present invention, the solenoid valve in the valve island 7 is preferably a proportional valve, and the feed force generated by the first cylinder 20 can be adjusted by adjusting the proportional valve.

[0052] like Figure 11 As shown, the tightening gun is also connected to a host computer 63. Host computer 63 is electrically connected to switch 61 and is used to display tightening status and data. Controller 60 is electrically connected to switch 61, which is electrically connected to servo controller 100. Servo controller 100 is electrically connected to motor 10 and controls the rotation of motor 10, thereby driving the rotation of the tool bar assembly.

[0053] The switch 61 is electrically connected to the valve island 7, and the valve island 7 is electrically connected to the third cylinder 43, driving the third piston rod 430 to extend into the feed pipe 40, and is used to stop the threaded nail 50 from continuing to enter the conduit 56. The valve island 7 is electrically connected to the first cylinder 20, and drives the tool rod 220 to slide in the tool rod guide groove through the tool head bracket 21. The valve island 7 is electrically connected to the second cylinder 30, and is used to drive the nail feeding assembly 5 to perform a clamping action until the pressure plate 51 contacts the surface to be processed. The valve island 7 is electrically connected to the fourth cylinder 23, and controls the movement of the fourth piston rod 230 of the fourth cylinder 23. The fourth piston rod 230 contacts the stop bolt 33, indicating that the main stroke after the tool rod 220 engages with the screw 50 and the feed of the tool rod 220 are synchronized. The valve island 7 is electrically connected to the pneumatic clamper 55 and controls the switch of the pneumatic clamper 55. When the pneumatic clamper 55 is closed, the clamping jaw 52 is closed. When the clamper 55 is pneumatically actuated, the clamping jaw 52 is driven by the clamping arm 54 to open.

[0054] The tightening gun also includes a remote module 62. The switch 61 is also electrically connected to the remote module 62. The remote module 62 is electrically connected to a first proximity switch 621 for detecting the movement of the first cylinder 20. The remote module 62 is electrically connected to a second proximity switch 622 for detecting the movement of the second cylinder 30. The remote module 62 is electrically connected to a third proximity switch 623 for detecting the movement of the third cylinder 43. The remote module 62 is electrically connected to a fourth proximity switch 624 for detecting the movement of the fourth cylinder 23. The remote module 62 is electrically connected to a fifth proximity switch 625 for detecting the movement of the pneumatic gripper 55.

[0055] The tightening gun also includes a first analog module 626 and a second analog module 627. The remote module 62 is electrically connected to the first analog module 626, which is in turn electrically connected to the first sensor 222 for detecting the torque generated by the motor 10 and transmitting it to the remote module 62. The remote module 62 is electrically connected to the second analog module 627, which is in turn electrically connected to the fourth sensor 9 for detecting the travel of the tool bar 220. The third sensor 42 is electrically connected to the remote module 62 for detecting the entry of the threaded screw 50 into the feed tube 40 and transmitting a signal to the remote module 62. The second sensor 57 is electrically connected to the remote module 62 and determines whether the clamping jaw 52 is open or closed by detecting the different positions of the clamping arm 54.

[0056] During operation, the feeder (not shown in the figure) delivers the threaded nail 50 to the feed pipe 40, the third sensor 42 detects the signal of the threaded nail 50, and transmits the signal to the sensor 6. The valve island 7 controls the third cylinder 43 to open the feed pipe 40; after the threaded nail 50 passes through the conduit 56 and reaches the second groove 520 of the clamping jaw 52, the valve island 7 controls the third cylinder 43 to stop the feed pipe 40 again. The first cylinder 20 drives the tool rod 220 to move through the tool head bracket 21 until the tool head 220 contacts the upper surface of the threaded nail 50; the motor 10 drives the tool rod 220 to rotate until the tool head 223 engages with the threaded nail 50. At this time, the first cylinder 20 and the second cylinder 30 respectively drive the tool head bracket 21 and the nail feeding assembly 5 to move downward at the same time until the pressure plate 51 contacts the surface to be processed. When the tip 501 of the screw 500 contacts the surface to be machined, the speed of the motor 10 increases, and the feed force of the first cylinder 20 increases. Simultaneously, the pneumatic clamp 57 opens, the clamping arm 54 drives the clamping jaw 52 to open, and the tool head support 21 drives the tool rod 220 to continue moving downward, tightening the screw 50 at the set torque. At this point, the tightening process ends, and all cylinders return to their original positions.

[0057] A tightening gun according to one embodiment of the present invention has a compact internal structure and a small size by positioning the first cylinder 20 directly above the fourth cylinder 23 and positioning the second cylinder 30 and the fourth cylinder 23 between the first sliding assembly 24 and the second sliding assembly 32. The structure is further compacted by mounting the stop bolt 33 on a third connecting plate 342 fixedly connected to the second cylinder 30 and positioning the fourth cylinder 23 directly above the stop bolt 33. The arbor support 21 is fixedly connected to both the first sliding assembly 24 and the second sliding assembly 32, thereby ensuring greater stability when the arbor support 21 drives the arbor assembly 22. By sharing the second sliding assembly 32 with the arbor support 21 and the nail feed assembly 5, the number of guide rails used is reduced, the structure is simpler, and costs are also reduced. By using a second sensor 57 to detect the different positions of the clamping arm 54 to determine whether the clamping jaw 52 is open or closed, detection is more accurate and safety during operation is enhanced. The quick-change head 225 is adapted to the quick-change bushing 221. By simply replacing the tool rod 220 of different specifications with the same quick-change head 225, different types of threaded nails 50 can be processed. This is convenient, fast and highly adaptable. When the telescopic tube 58 is under stress, it withdraws from the tool rod guide groove 53 due to the downward pressure of the tool rod 220, preventing the threaded nail 50 from entering and causing a nail jam. The structure is simple. When the telescopic tube 58 is not under stress, it is driven by the restoring force of the spring 581 to extend into the tool rod guide groove 53, achieving conduction between the conduit 56, the telescopic tube 58 and the tool rod guide groove 53, which is convenient for feeding and has a simple structure. By detachably housing one end of the spring 581 in the telescopic tube 58 and detachably mounting the other end on the support block 582, it is easy to disassemble when a nail jam occurs. By setting the pressure plate 51 with a circular ring structure, the contact area is increased, the force is more evenly distributed, and the appearance of indentations is reduced. By using the first sensor 222 to connect with the screw shaft 11, the torque generated during the tightening process can be better monitored and detected, thereby improving stability. The motor 10 drives the cutter bar 220 to rotate at high speed, softening the connecting sheet. The first cylinder 20, under the powerful feed force, squeezes and screws the sheet to be connected, ultimately forming a threaded connection between the sheet and the screw 50. This process eliminates the need for pre-drilling, resulting in high production efficiency. The first sensor 222 and the fourth sensor 9 monitor the torque and stroke generated during the tightening process, improving stability.

[0058] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A tightening gun head, characterized in that: The invention comprises a nail feeding assembly (5), wherein the nail feeding assembly (5) comprises a knife bar guide groove (53), a guide tube (56), a telescopic tube (58), a spring (581) and a support block (582), wherein the guide tube (56) can abut against the telescopic tube (58), and the telescopic tube (58) can communicate with the knife bar guide groove (53), and one end of the spring (581) can be detachably accommodated in the telescopic tube (58), and the other end can be detachably mounted on the support block (582), and the tightening gun comprises a knife bar (220) The knife rod (220) is movably accommodated in the knife rod guide groove (53). When the knife rod (220) moves downward, the telescopic tube (58) is in a stressed state. After receiving the downward pressure of the knife rod (220), the telescopic tube (58) withdraws from the knife rod guide groove (53) and compresses the spring (581); when the knife rod moves upward, the telescopic tube (58) is in an unstressed state, and the restoring force of the spring (581) drives the telescopic tube (58) to enter the knife rod guide groove (53).

2. The tightening gun head according to claim 1, characterized in that: A fourth groove (532) is provided on the knife rod guide groove (53), and one end of the telescopic tube (58) is movably accommodated in the fourth groove (532).

3. The tightening gun head according to claim 2, characterized in that: A sixth through hole (533) is provided on the inner wall of the fourth groove (532), and the end of the telescopic tube (58) is accommodated in the sixth through hole (533).

4. The tightening gun head according to claim 3, characterized in that: The telescopic tube (58) includes a first end portion (584) and a second end portion (585). In an unstressed state, the first end portion (584) is located in the knife rod guide groove (53), and the second end portion (585) abuts against the edge of the sixth through hole (533), and the telescopic tube (58) is connected to the knife rod guide groove (53).

5. The tightening gun head according to claim 4, characterized in that: In a stressed state, the first end portion (584) abuts against the knife rod (220), and the second end portion (585) is offset from the edge of the sixth through hole (533).

6. The tightening gun head according to claim 5, characterized in that: In an unstressed state, the edge of the telescopic tube (58) abuts against the edge of the conduit (56), and the telescopic tube (58) is communicated with the conduit (56).

7. The tightening gun head according to claim 6, characterized in that: In a stressed state, the edge of the telescopic tube (58) is offset from the edge of the conduit (56).

8. The tightening gun head according to claim 1, characterized in that: A countersunk hole (583) is provided on the telescopic tube (58), and one end of the spring (581) is accommodated in the countersunk hole (583).

9. The tightening gun head according to claim 8, characterized in that: The nail feeding assembly (5) further comprises a fifth connecting plate (37), and the supporting block (582) is detachably mounted on the fifth connecting plate (37).

10. The tightening gun head according to claim 1, characterized in that: The knife rod guide groove (53) is also fixedly connected to a pressing plate (51), and the pressing plate (51) is a circular ring structure.

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