Binding gun with adjustable tensioning force

Abstract

The utility model provides a strapping gun with adjustable tensioning force, which comprises a strapping mechanism and a wire feeding mechanism, and the wire feeding mechanism is arranged on the strapping mechanism. According to the strapping gun with the adjustable strapping force, the designed wire clamping resistance device can adjust the strapping force applied to the strapping wire, on one hand, enough strapping force is provided for the strapping execution tail end, on the other hand, the strapping wire is prevented from loosening, and the strapping gun is convenient to use. The godet assembly is matched with the wire feeding assembly to realize free switching between a wire feeding state and a wire feeding stopping state; and meanwhile, the buffering mechanism is further arranged, the good buffering effect can be achieved, the limiting stopping mechanism can prevent the binding gun from being collided and being pulled by the binding wire from damaging equipment, and the good protection effect can be achieved on the binding gun.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar binding, in particular to a binding gun with adjustable tensioning force. Background Art

[0002] Rebar tying is the process of tying the intersections of transversely arranged steel bars and longitudinally arranged steel bars. It is a rigid process in construction. The current operating methods mainly include manual tying and machine tying.

[0003] Pure manual tying will waste a lot of manpower and have low tying efficiency, which will seriously affect the subsequent construction;

[0004] During the binding process of machine binding, the binding gun needs to move multiple times to complete the binding of a node, which seriously affects its binding efficiency. In addition, during the use of existing binding guns, the binding wire delivered is prone to insufficient tension, and the binding wrapped around the steel bars by the binding gun is loose when executing the binding. On the other hand, during the binding process, the binding wire lacks tension and is prone to entanglement and wire jumping in the wire feeding mechanism, causing equipment shutdown, or even damage to the equipment. The end actuator of the binding gun lacks a protective device, and it may be pulled by the binding wire when it goes up, or hit the steel bars when it goes down, causing immeasurable consequences. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a strapping gun with adjustable tensioning force. The wire clamping resistance device designed by the utility model can adjust the tensioning force applied to the binding wire. On the one hand, it provides sufficient tensioning force to the binding execution end, and on the other hand, it prevents the binding wire from loosening. The wire guide disc assembly and the wire feeding assembly cooperate to realize the free switching of the wire feeding and wire feeding stop states; at the same time, a buffer mechanism is also provided, which can play a good buffering effect. The limit stop mechanism can prevent the strapping gun from being damaged when it collides with and is pulled by the strapping wire, and can play a good protective role for the strapping gun.

[0006] Technical solution: To achieve the above purpose, the utility model provides a tying gun with adjustable tensioning force, comprising a tying mechanism and a wire feeding mechanism, wherein the wire feeding mechanism is arranged on the tying mechanism;

[0007] The wire feeding mechanism includes a wire feeding arm, a wire guide disc assembly, a wire feeding assembly and a wire clamping resistance device, the wire guide disc assembly is installed on the wire feeding arm, the wire feeding assembly is arranged on the wire feeding arm, the wire clamping resistance device is arranged on the wire feeding arm, the wire clamping resistance device is located at the wire outlet end of the wire feeding assembly, and the wire guide disc assembly is located at the wire inlet end of the wire feeding assembly.

[0008] Preferably, the lashing mechanism comprises a lashing actuator, a lashing fixing seat, a buffer mechanism and a limit stop mechanism, the lashing actuator is arranged on the lashing fixing seat, the buffer mechanism and the limit stop mechanism are arranged on the lashing fixing seat and both are connected to the lashing actuator;

[0009] The lashing fixing seat comprises a fixing plate and a fixing side plate, and the fixing plate and the fixing side plate are fixedly and vertically connected;

[0010] The buffer mechanism comprises a swing block, a swing cover plate, a group of buffer springs and a spring seat;

[0011] The spring seat is arranged on the fixed side plate, the lashing actuator is rotatably mounted on the fixed side plate and is connected to the swing cover plate through the fixed side plate, the swing block is fixed on the swing cover plate, and the buffer spring is arranged between the spring seat and the swing block;

[0012] The limit stop mechanism includes a sensing plate and a Hall element switch, wherein the sensing plate is fixed on the swing cover plate, and the Hall element switch is arranged on one side of the fixed side plate. The lashing actuator rotates under force, and the rotation torque is transmitted to the buffer spring through the swing block, which plays a good buffering role. At the same time, if the rotation angle of the lashing actuator is too large (pulled by the lashing wire when going up, and hits an obstacle when going down), the sensing plate rotates out of the sensing range of the Hall element switch, and the Hall element switch issues a command to stop it.

[0013] In addition, it also includes a longitudinal horizontal moving module, the upper part of which is connected to the wire feeding arm, and the lower part of which is connected to the binding fixed seat through a sliding seat; the longitudinal horizontal moving module is provided with a photoelectric limit switch, and the sliding seat is provided with a baffle. The longitudinal horizontal moving module can make the binding mechanism move longitudinally, and the binding mechanism realizes the binding of the edge of the steel mesh; the photoelectric limit switch and the baffle cooperate to limit the longitudinal movement distance of the binding mechanism.

[0014] Wherein, the wire clamping resistance device includes a resistance mounting frame, a resistance bracket, an electromagnet driving device, a driving connecting rod, a resistance pressure plate and a resistance guide hole anvil, the resistance mounting frame is arranged on the wire feeding arm, the resistance bracket is fixed on the resistance mounting frame, the electromagnet driving device, the driving connecting rod, the resistance pressure plate and the resistance guide hole anvil are all arranged on the resistance bracket, the electromagnet driving device is connected to the resistance pressure plate through the driving connecting rod, and the end of the resistance pressure plate is located in the resistance guide hole anvil. The utility model is used for a wire feeding mechanism with adjustable tensioning force for steel bar binding. A wire clamping resistance device is added to the wire feeding mechanism, and resistance is applied to the binding wire during the wire feeding process, so that it can provide sufficient tension at the end of the binding execution, thereby improving the tightness of the binding; on the other hand, during the wire feeding process, the binding wire is in a tight state under the action of the wire clamping resistance device, which avoids loose winding of the binding wire and makes it more suitable for automatic binding of the binding gun.

[0015] Preferably, the driving connecting rod includes a resistance fork and a swing rod, one end of the resistance fork is hinged to the driving rod of the electromagnet driving device, and the other end is connected to the swing rod, and the swing rod is perpendicular to the resistance fork, the resistance fork can drive the swing rod to rotate, the bottom of the swing rod is connected to the resistance pressure plate, and the end of the resistance pressure plate is a smooth cylindrical surface. The electromagnet driving device can drive the resistance fork to rotate by telescoping, thereby driving the swing rod to rotate, and the swing rod drives the resistance pressure plate to change the feeding amount of its cylindrical surface on the resistance guide hole anvil, thereby adjusting the resistance applied to the binding wire.

[0016] Furthermore, the wire guide disc assembly includes a wire guide disc mounting frame, a wire guide disc and a wire guide disc brake mechanism, the wire guide disc mounting frame is mounted on the wire feeding arm frame, the wire guide disc is rotatably arranged in the middle of the wire guide disc mounting frame through a rotating shaft, and the wire guide disc brake mechanism is arranged on the wire guide disc mounting frame.

[0017] Specifically, the wire guide disc brake mechanism includes a brake sprocket, a brake electromagnet driving device, and a brake lever. The brake sprocket is coaxially arranged at the bottom of the wire guide disc, the brake lever is connected to the brake electromagnet driving device, the brake lever can be engaged with the brake sprocket, and the brake electromagnet driving device is arranged on the wire guide disc mounting frame. When the front end does not need to supply wire or fails, the brake electromagnet driving device drives the brake lever to engage with the brake sprocket to complete the locking of the wire guide disc.

[0018] Furthermore, the wire feeding assembly includes a wire feeding mounting frame, a wire feeding motor and a wire feeding guide assembly. The wire feeding mounting frame is mounted on a wire feeding arm, the wire feeding motor is fixed on the wire feeding mounting frame, and the wire feeding guide assembly is connected to the wire feeding motor.

[0019] Preferably, the wire feeding guide assembly comprises a guide housing, a group of guide driving wheels, a group of clamping wheels and a guide tube, the guide driving wheels are rotatably mounted in the guide housing, the wire feeding motor is connected to the guide driving wheels through gears, the clamping wheels are in contact with the guide driving wheels, and a guide tube is arranged between the guide driving wheels. The guide driving wheels cooperate with the clamping wheels to pull and guide the binding wire.

[0020] Furthermore, the clamping light wheel is rotatably installed in the housing, one end of the housing is hinged to the guide housing and a torsion spring is arranged between the two, and the other end of the housing is connected to the guide housing through a buckle; the cylindrical surface of the guide drive wheel is provided with a plurality of wire guide grooves. When the buckle is released, the housing and the clamping light wheel are lifted upward under the action of the torsion spring, which is convenient for troubleshooting the internal fault of the wire feeding guide assembly.

[0021] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0022] 1. The utility model provides a strapping gun with adjustable tensioning force. The wire clamping resistance device designed by the utility model can adjust the tensioning force applied to the binding wire. On the one hand, it provides sufficient tensioning force to the binding execution end, and on the other hand, it prevents the binding wire from loosening. The wire guide disc assembly cooperates with the wire feeding assembly to realize the free switching of the wire feeding state and the wire feeding stop state. At the same time, a buffer mechanism is also provided, which can play a good buffering effect. The limit stop mechanism can prevent the strapping gun from being damaged when it hits or is pulled by the strapping wire, and can play a good protective role for the strapping gun.

[0023] 2. The wire feeding guide assembly in the utility model is designed with a guide drive wheel with a wire guide groove, a clamping wheel that cooperates with the guide drive wheel to clamp, and a wire guide tube, which can achieve the benign transportation of the binding wire and avoid wire entanglement and wire jumping. At the same time, the buckle design of the clamping wheel and the guide shell can effectively eliminate internal faults of the wire feeding guide assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a strapping gun with adjustable tensioning force according to the utility model;

[0025] Figure 2 This is an axonometric view of a strapping gun with adjustable tensioning force according to the utility model;

[0026] Figure 3 It is a structural schematic diagram of the binding mechanism in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the wire clamping resistance device in the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the wire guide disc assembly in the utility model;

[0029] Figure 6 This is a structural schematic diagram of the guide assembly of the central conveyor of the utility model;

[0030] Figure 7 It is a cross-sectional view of the guide assembly of the conveyor in the utility model;

[0031] Figure 8 This is a schematic diagram of the installation of the binding mechanism and the wire feeding mechanism in Example 2.

[0032] In the figure: 1-binding mechanism, 11-binding actuator, 12-binding fixed seat, 121-fixed plate, 122-fixed side plate, 13-buffer mechanism, 131-swing block, 132-swing cover plate, 133-buffer spring, 134-spring seat, 14-limit stop mechanism, 141-sensing plate, 142-Hall element switch, 15-longitudinal and horizontal moving module, 16-swing cylinder, 2-wire feeder, 21-wire feeder arm, 22-wire guide disc assembly, 221-wire guide disc mounting frame, 222-wire guide disc, 223-wire guide disc brake mechanism, 2231-brake gear disc, 223 2-brake electromagnet drive device, 2233-brake lever, 23-wire feeding assembly, 231-wire feeding mounting frame, 232-wire feeding motor, 233-wire feeding guide assembly, 2331-guide housing, 2332-guide driving wheel, 2333-pressure light wheel, 2334-guide tube, 23331-housing, 23332-torsion spring, 24-wire clamping resistance device, 241-resistance mounting frame, 242-resistance bracket, 243-electromagnet drive device, 244-driving connecting rod, 2441-resistance fork, 2442-rocker, 245-resistance pressure plate, 246-guide hole anvil. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0034] Example 1

[0035] In one embodiment, Figure 1-Figure 2 As shown: a tying gun with adjustable tensioning force, comprising a tying mechanism 1 and a wire feeding mechanism 2, wherein the wire feeding mechanism 2 is arranged on the tying mechanism 1;

[0036] The wire feeding mechanism 2 includes a wire feeding arm 21, a wire guide disc assembly 22, a wire feeding assembly 23 and a wire clamping resistance device 24, wherein the wire guide disc assembly 22 is installed on the wire feeding arm 21, the wire feeding assembly 23 is arranged on the wire feeding arm 21, the wire clamping resistance device 24 is arranged on the wire feeding arm 21, the wire clamping resistance device 24 is located at the wire outlet end of the wire feeding assembly 23, and the wire guide disc assembly 22 is located at the wire inlet end of the wire feeding assembly 23.

[0037] like Figure 3 As shown, the lashing mechanism 1 comprises a lashing actuator 11, a lashing fixing seat 12, a buffer mechanism 13 and a limit stop mechanism 14, wherein the lashing actuator 11 is arranged on the lashing fixing seat 12, and the buffer mechanism 13 and the limit stop mechanism 14 are arranged on the lashing fixing seat 12 and both are connected to the lashing actuator 11;

[0038] The lashing fixing seat 12 comprises a fixing plate 121 and a fixing side plate 122, and the fixing plate 121 and the fixing side plate 122 are fixedly connected vertically;

[0039] The buffer mechanism 13 includes a swing block 131, a swing cover plate 132, a group of buffer springs 133, and a spring seat 134;

[0040] The spring seat 134 is arranged on the fixed side plate 122, the lashing actuator 11 is rotatably mounted on the fixed side plate 122 and passes through the fixed side plate 122 to be connected with the swing cover plate 132, the swing block 131 is fixed on the swing cover plate 132, and the buffer spring 133 is arranged between the spring seat 134 and the swing block 131;

[0041] The limit stop mechanism 14 includes a sensing plate 141 and a Hall element switch 142 . The sensing plate 141 is fixed on the swing cover plate 132 , and the Hall element switch 142 is arranged on one side of the fixed side plate 122 .

[0042] Please refer again Figure 3 The strapping gun also includes a longitudinal horizontal moving module 15, the upper part of which is connected to the wire feeding arm 21, and the lower part of which is connected to the binding fixed seat 12 through a sliding seat 151; a photoelectric limit switch 152 is provided on the longitudinal horizontal moving module 15, and a baffle 153 is provided on the sliding seat 151.

[0043] like Figure 4 As shown, the wire clamping resistance device 4 includes a resistance mounting frame 41, a resistance bracket 42, an electromagnet driving device 43, a driving connecting rod 44, a resistance pressure plate 45 and a resistance guide hole anvil 46. The resistance mounting frame 41 is arranged on the wire feeding arm 1, and the resistance bracket 42 is fixed on the resistance mounting frame 41. The electromagnet driving device 43, the driving connecting rod 44, the resistance pressure plate 45 and the resistance guide hole anvil 46 are all arranged on the resistance bracket 42. The electromagnet driving device 43 is connected to the resistance pressure plate 45 through the driving connecting rod 44, and the end of the resistance pressure plate 45 is located in the resistance guide hole anvil 46.

[0044] The driving connecting rod 44 includes a resistance fork 441 and a rocker rod 442. One end of the resistance fork 441 is hinged to the driving rod of the electromagnet driving device 43, and the other end is connected to the rocker rod 442. The rocker rod 442 is perpendicular to the resistance fork 441. The resistance fork 441 can drive the rocker rod 442 to rotate. The bottom of the rocker rod 442 is connected to the resistance pressure plate 45, and the end of the resistance pressure plate 45 is a smooth cylindrical surface.

[0045] like Figure 5As shown, the wire guide disc assembly 2 includes a wire guide disc mounting frame 21, a wire guide disc 22 and a wire guide disc brake mechanism 23. The wire guide disc mounting frame 21 is arranged on the wire feeding arm frame 1, the wire guide disc 22 is rotatably arranged in the middle of the wire guide disc mounting frame 21 through a rotating shaft, and the wire guide disc brake mechanism 23 is arranged on the wire guide disc mounting frame 21.

[0046] The wire guide disc brake mechanism 23 includes a brake sprocket 231, a brake electromagnet driving device 232, and a brake lever 233. The brake sprocket 231 is coaxially arranged at the bottom of the wire guide disc 22. The brake lever 233 is connected to the brake electromagnet driving device 232. The brake lever 2233 can be engaged with the brake sprocket 2231. The brake electromagnet driving device 2232 is arranged on the wire guide disc mounting frame 221.

[0047] like Figure 6 As shown, the wire feeding assembly 3 includes a wire feeding mounting frame 31, a wire feeding motor 32 and a wire feeding guide assembly 33. The wire feeding mounting frame 31 is arranged on the wire feeding arm 1, the wire feeding motor 32 is fixed on the wire feeding mounting frame 31, and the wire feeding guide assembly 33 is connected to the wire feeding motor 32.

[0048] A further optimized solution is that the wire feeding guide assembly 33 includes a guide shell 331, a group of guide drive wheels 332, a group of clamping light wheels 333 and a guide tube 334. The guide drive wheel 332 is rotatably installed in the guide shell 331, the wire feeding motor 32 is connected to the guide drive wheel 332 through a gear, the clamping light wheel 333 is in contact with the guide drive wheel 332, and a guide tube 334 is arranged between the guide drive wheels 332.

[0049] In addition, the clamping light wheel 333 is rotatably installed in the shell 3331, one end of the shell 3331 is hinged to the guide shell 331 and a torsion spring 3332 is arranged between the two, and the other end of the shell 3331 is connected to the guide shell 331 through a buckle; the cylindrical surface of the guide drive wheel 332 is provided with a plurality of wire guide grooves.

[0050] Example 2

[0051] The contents not listed in this embodiment are the same as those in Embodiment 1. Figure 7 As shown: the binding mechanism 1 is connected to the wire feeder 2 through the swing cylinder 16, the fixed plate 121 is connected to the bottom of the swing cylinder 16, and the upper part of the swing cylinder 16 is fixedly connected to the wire feeder arm 21. The swing cylinder 16 can realize the rotation of the binding actuator 11, so that the binding mechanism 1 can realize the 8-shaped binding of the cross nodes of the steel mesh at 90 degrees.

[0052] The above embodiment discloses a wire feeding mechanism with adjustable tensioning force for steel bar binding. In actual use, the binding gun in embodiment 1 and the binding gun in embodiment 2 are installed on the lifting truss in combination, and the binding gun in embodiment 1 is preferably installed on the edge, and the binding gun in embodiment 2 is installed in the middle. The working principle is as follows:

[0053] The binding wire is wound around the wire guide disc 222, one end of which passes through the wire feeding guide assembly 23 and is wound around the guide driving wheel 2332, and then passes through the guide hole anvil plate 246 in the wire clamping resistance device 24 and contacts the resistance pressure plate 245, and finally is sent to the binding gun. Before or during work, the operator can adjust the wire clamping resistance device 24 according to the on-site conditions, turn on the electromagnet drive device 243 to drive the connecting rod 244 to make the resistance pressure plate 245 close to the binding wire, increase the resistance between the electromagnet drive device 243 and the resistance pressure plate 245, and then the tension of the binding gun is greater, otherwise the tension of the binding gun can be reduced; when it is necessary to pause the wire feeding, the brake electromagnet drive device 2232 drives the brake lever 2233 to rotate to facilitate the engagement of the brake gear disc 2231, thereby locking the wire guide disc 222.

[0054] The binding actuator 11 clamps the binding wire, and the swing cylinder 16 drives the binding actuator 11 to rotate 90° to achieve cross binding. The binding gun located at the edge can adjust the longitudinal position of the binding actuator 11 through the longitudinal horizontal moving module 15 according to the actual needs of binding, so as to achieve the binding and fixation of the edge steel bars.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A strapping gun with adjustable tensioning force, characterized in that: It comprises a binding mechanism (1) and a wire feeding mechanism (2), wherein the wire feeding mechanism (2) is arranged on the binding mechanism (1); The wire feeding mechanism (2) comprises a wire feeding arm (21), a wire guide disc assembly (22), a wire feeding assembly (23) and a wire clamping resistance device (24); the wire guide disc assembly (22) is mounted on the wire feeding arm (21); the wire feeding assembly (23) is arranged on the wire feeding arm (21); the wire clamping resistance device (24) is arranged on the wire feeding arm (21); the wire clamping resistance device (24) is located at a wire outlet end of the wire feeding assembly (23); and the wire guide disc assembly (22) is located at a wire inlet end of the wire feeding assembly (23).

2. A strapping gun with adjustable tensioning force according to claim 1, characterized in that: The lashing mechanism (1) comprises a lashing actuator (11), a lashing fixing seat (12), a buffer mechanism (13) and a limit stop mechanism (14); the lashing actuator (11) is arranged on the lashing fixing seat (12); the buffer mechanism (13) and the limit stop mechanism (14) are arranged on the lashing fixing seat (12) and both are connected to the lashing actuator (11); The lashing fixing seat (12) comprises a fixing plate (121) and a fixing side plate (122), wherein the fixing plate (121) and the fixing side plate (122) are fixedly connected vertically; The buffer mechanism (13) comprises a swing block (131), a swing cover plate (132), a group of buffer springs (133), and a spring seat (134); The spring seat (134) is arranged on one side of the fixed side plate (122); the lashing actuator (11) is rotatably mounted on the fixed side plate (122) and passes through the fixed side plate (122) to be connected to the swing cover plate (132); the swing block (131) is fixedly arranged on the swing cover plate (132); and the buffer spring (133) is arranged between the spring seat (134) and the swing block (131); The limit stop mechanism (14) comprises a sensing plate (141) and a Hall element switch (142); the sensing plate (141) is fixedly mounted on the swing cover plate (132); and the Hall element switch (142) is disposed on one side of the fixed side plate (122).

3. The strapping gun with adjustable tensioning force according to claim 1, characterized in that: It also comprises a longitudinal horizontal movable module (15), the upper part of which is connected to the wire feeding arm (21), and the lower part of which is connected to the binding fixing seat (12) via a sliding seat (151); a photoelectric limit switch (152) is provided on the longitudinal horizontal movable module (15), and a baffle (153) is provided on the sliding seat (151).

4. The strapping gun with adjustable tensioning force according to claim 1, characterized in that: The wire clamping resistance device (24) comprises a resistance mounting frame (241), a resistance bracket (242), an electromagnet driving device (243), a driving connecting rod (244), a resistance pressing plate (245) and a resistance guide hole anvil (246); the resistance mounting frame (241) is arranged on the wire feeding arm frame (21); the resistance bracket (242) is fixed on the resistance mounting frame (241); the electromagnet driving device (243), the driving connecting rod (244), the resistance pressing plate (245) and the resistance guide hole anvil (246) are all arranged on the resistance bracket (242); the electromagnet driving device (243) is connected to the resistance pressing plate (245) via the driving connecting rod (244); and the end of the resistance pressing plate (245) is located inside the resistance guide hole anvil (246).

5. The strapping gun with adjustable tensioning force according to claim 4, characterized in that: The driving connecting rod (244) comprises a resistance fork (2441) and a rocker rod (2442); one end of the resistance fork (2441) is hinged to the driving rod of the electromagnet driving device (243); the other end is connected to the rocker rod (2442); the rocker rod (2442) is perpendicular to the resistance fork (2441); the resistance fork (2441) can drive the rocker rod (2442) to rotate; the bottom of the rocker rod (2442) is connected to the resistance pressure plate (245); the end of the resistance pressure plate (245) is a smooth cylindrical surface.

6. The strapping gun with adjustable tensioning force according to claim 1, characterized in that: The wire guide disc assembly (22) comprises a wire guide disc mounting frame (221), a wire guide disc (222) and a wire guide disc brake mechanism (223); the wire guide disc mounting frame (221) is arranged on a wire feeding arm frame (21); the wire guide disc (222) is rotatably arranged in the middle of the wire guide disc mounting frame (221) via a rotating shaft; and the wire guide disc brake mechanism (223) is arranged on the wire guide disc mounting frame (221).

7. A strapping gun with adjustable tensioning force according to claim 6, characterized in that: The wire guide disc brake mechanism (223) comprises a brake sprocket (2231), a brake electromagnet drive device (2232), and a brake lever (2233); the brake sprocket (2231) is coaxially arranged at the bottom of the wire guide disc (222); the brake lever (2233) is connected to the brake electromagnet drive device (2232); the brake lever (2233) can be engaged with the brake sprocket (2231); and the brake electromagnet drive device (2232) is arranged on the wire guide disc mounting frame (221).

8. The strapping gun with adjustable tensioning force according to claim 1, characterized in that: The wire feeding assembly (23) comprises a wire feeding mounting frame (231), a wire feeding motor (232) and a wire feeding guide assembly (233); the wire feeding mounting frame (231) is arranged on the wire feeding arm frame (21); the wire feeding motor (232) is fixedly arranged on the wire feeding mounting frame (231); and the wire feeding guide assembly (233) is connected to the wire feeding motor (232).

9. The strapping gun with adjustable tensioning force according to claim 8, characterized in that: The wire feeding guide assembly (233) comprises a guide housing (2331), a group of guide drive wheels (2332), a group of clamping wheels (2333) and a guide tube (2334); the guide drive wheel (2332) is rotatably mounted in the guide housing (2331); the wire feeding motor (232) is connected to the guide drive wheel (2332) via a gear; the clamping wheel (2333) is in contact with the guide drive wheel (2332); and a guide tube (2334) is arranged between the group of guide drive wheels (2332).

10. The strapping gun with adjustable tensioning force according to claim 9, characterized in that: The clamping light wheel (2333) is rotatably mounted in a housing (23331); one end of the housing (23331) is hinged to the guide housing (2331) and a torsion spring (23332) is arranged between the two; the other end of the housing (23331) is connected to the guide housing (2331) via a buckle; and a spiral wire guide groove is arranged on the cylindrical surface of the guide drive wheel (2332).

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