A rivet gun with tension detection function

Abstract

The present invention relates to the technical field of automatic rivet guns, and in particular to a rivet gun with a tension detection function, which includes a gun body, a nail clamping mechanism, a tension detector and a driving mechanism, wherein a muzzle is arranged at one end of the gun body, and the nail clamping mechanism, the tension detector and the driving mechanism are arranged in sequence along the direction of the gun body away from the muzzle; the driving mechanism is provided with a telescopic rod, one end of the tension detector is connected to the nail clamping mechanism, and the other end of the tension detector is connected to the telescopic rod; a nail feeding through hole is arranged in the middle of the tension detector. The structural design of the present invention is simple and compact, and the rivet gun can realize tension monitoring, and the tension monitoring is accurate and timely, which is convenient for the operator to control the tension within a reasonable range, thereby improving the quality and efficiency of riveting.

Description

Technical Field

[0001] The invention relates to the technical field of automatic rivet guns, in particular to a rivet gun with a tension detection function. Background Art

[0002] The most commonly used riveting technology is single-sided riveting technology, and the implementation tools include manual riveting tools, pneumatic riveting tools, AC electric riveting tools and rechargeable electric riveting tools; riveting is mainly used for the connection of aluminum, iron and stainless steel plates. Among them, the pull riveting gun is widely used in decoration, automobile manufacturing and modification, containers, electrical appliances, home appliances, instruments, bags and machinery manufacturing industries. It has the advantages of convenient riveting, fast riveting speed and light weight.

[0003] However, with the development of riveting technology, many products will strictly control the quality of rivets during the production process to ensure that the quality of product production meets the standards. At present, the quality inspection of rivets is to test the breaking force of rivets to determine whether the rivets meet the use standards. Now people can only put the rivets in a tensile tester, clamp the two ends of the rivets, and then break them to detect the quality of the rivets. The tensile tester is accurate and reliable, but it takes more than ten minutes to detect a rivet. If 10% of a thousand rivets are drawn for quality inspection, 100 rivets must be inspected. How long will it take? In addition, when using a rivet gun for riveting operations, the tension will be too large or too small because it is impossible to monitor the tension in real time and make adjustments. Excessive tension will cause the tail teeth to be broken or not installed in place, and too small tension will cause the installation to be in place and not firm. Therefore, it is impossible to ensure that the tension value is within a reasonable range when riveting, resulting in unstable quality of parts assembly and product quality. The above problems urgently need an effective solution. Summary of the invention

[0004] The purpose of the present invention is to provide a rivet gun capable of performing real-time detection of the pulling force of a rivet in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides a rivet gun with a tension detection function, which comprises a gun body, a nail clamping mechanism, a tension detector and a driving mechanism, wherein a muzzle is arranged at one end of the gun body, and the nail clamping mechanism, the tension detector and the driving mechanism are arranged in sequence along the direction of the gun body away from the muzzle; the driving mechanism is provided with a telescopic rod, one end of the tension detector is connected to the nail clamping mechanism, and the other end of the tension detector is connected to the telescopic rod; a nail feeding through hole is arranged in the middle of the tension detector.

[0007] Wherein, the gun body is provided with a receiving cavity for receiving the tension detector, and the maximum outer diameter of the tension detector is less than or equal to the inner diameter of the receiving cavity.

[0008] Among them, the clamping mechanism includes a connecting sleeve and a clamping nail assembly, an end of the tension detector close to the clamping nail mechanism is provided with an external threaded rod, and an end of the tension detector close to the driving mechanism is provided with an internal threaded sleeve, the nail feeding through hole is located on the central axis of the tension detector, and the nail feeding through hole passes through the internal threaded sleeve and the external threaded rod; one end of the connecting sleeve is screwed to the external threaded rod of the tension detector, and the other end of the connecting sleeve is connected to the clamping nail assembly; the telescopic rod of the driving mechanism is screwed to the internal threaded sleeve of the tension detector.

[0009] Furthermore, the nail clamping mechanism also includes a needle guide tube, one end of which is connected to the nail clamping assembly, and the other end of which is inserted into the nail feeding through hole and the telescopic rod in sequence.

[0010] Furthermore, the clamping nail assembly includes a claw piece, a clamping sleeve arranged in the gun body and connected to the connecting bushing, a plug for clamping the claw piece, and a spring for providing thrust to the plug. An inner conical hole is arranged at one end of the clamping sleeve close to the muzzle, and the claw piece is installed in the inner conical hole; the plug is pressed against a side of the claw piece close to the connecting bushing; one end of the spring is abutted against the connecting bushing, and the other end of the spring is abutted against the plug; the plug is connected to the guide needle tube and is hollow.

[0011] The tension detector is provided with a signal connection line, and a threading groove is provided at a position of the gun body corresponding to the signal connection line; and a wire protection component for protecting the signal connection line is provided on the outer side of the gun body.

[0012] Furthermore, the wire protection assembly includes a first wire protection tube, a bend wire protection device and a protection box cover, the first wire protection tube is arranged on the outside of the gun body, and the axial direction of the first wire protection tube is parallel to the axial direction of the gun body; a bend wire protection device is arranged between the wire inlet of the first wire protection tube and the wire outlet of the tension detector; the protection box cover is used to cover the first wire protection tube and the bend wire protection device.

[0013] Furthermore, the wire bending protection device includes a second wire protection tube and a wire protection clamp block, one end of the second wire protection tube is connected to the wire outlet of the tension detector, and the other end of the second wire protection tube protrudes out of the gun body; one end of the wire protection clamp block clamps the first wire protection tube, and the other end of the wire protection clamp block clamps the second wire protection tube.

[0014] Furthermore, an open groove is provided on one side of the second wire protection tube.

[0015] Furthermore, a flange is provided on the outer side of the gun body, and a positioning through hole for the first wire protection tube to pass through is provided on the flange.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a rivet gun with a tension detection function, in which a tension detector is added between a driving mechanism and a clamping mechanism. When the driving mechanism drives the telescopic rod to pull the tension detector and pull the clamping mechanism together, the tension detector is subjected to tension and measures the tension value of the rivet gun in real time, which is convenient for the operator to judge whether the rivet meets the specification standard, and then judge the riveting quality of the rivet; at the same time, in order to facilitate the transfer of the rivet core after it is broken, a hollow nail feeding through hole is provided on the tension detector, so that the broken nail core can be transferred to a designated position for collection. The structural design of the present invention is simple and compact, the rivet gun can realize tension monitoring, and the tension monitoring is accurate and timely, which is convenient for the operator to control the tension within a reasonable range, thereby improving the quality and efficiency of riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural cross-sectional view of the present invention;

[0019] Figure 2 It is a schematic diagram of the structural decomposition of the nail clamping mechanism, the tension detector and the driving mechanism of the present invention;

[0020] Figure 3 is a schematic structural diagram of a second wire protection tube of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the wire protection box cover and the gun body of the present invention being decomposed;

[0022] Figure 5 It is a schematic diagram of the appearance structure of the present invention.

[0023] Description of Reference Numerals

[0024] 1. Gun body; 11. Gun muzzle; 12. Nail row port; 13. Threading groove; 14. Flange; 141. Positioning hole; 2. Nail clamping mechanism; 21. Connecting bushing; 22. Guide needle tube; 23. Head; 24. Clamping sleeve; 25. Inner tapered hole; 26. Claw; 27. Spring; 3. Tension detector; 31. Nail feeding hole; 4. Driving mechanism; 41. Telescopic rod; 411. Output slot; 5. Wire protection assembly; 51. First wire protection tube; 52. Second wire protection tube; 521. Opening slot; 53. Wire protection clamp block; 531. Left clamp block; 532. Right clamp block; 54. Protective box cover. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0026] like Figures 1 to 5 As shown, the present invention provides a rivet gun with a tension detection function, which includes a gun body 1, a nail clamping mechanism 2, a tension detector 3 and a driving mechanism 4. One end of the gun body 1 is provided with a muzzle 11, and the nail clamping mechanism 2, the tension detector 3 and the driving mechanism 4 are arranged in sequence along the direction of the gun body 1 away from the muzzle 11; the driving mechanism 4 is provided with a telescopic rod 41, one end of the tension detector 3 is connected to the nail clamping mechanism 2, and the other end of the tension detector 3 is connected to the telescopic rod 41; the middle part of the tension detector 3 is provided with a nail feeding through hole 31. Specifically, the tension detector 3 can be a tension sensor or other instrument that can monitor and detect tension data. The driving mechanism 4 drives the telescopic rod 41 to telescopically move back and forth, and the telescopic rod 41 moves back and forth along the axial direction of the gun body 1. The nail clamping mechanism 2 is used to clamp the nail core of the rivet. The driving mechanism 4 may be a cylinder mechanism, a hydraulic cylinder mechanism or an electric mechanism, wherein the telescopic rod 41 is a piston rod in the cylinder mechanism or the hydraulic cylinder mechanism, or the telescopic rod 41 is driven to move by the cooperation of a motor, a screw rod and a nut in the electric mechanism.

[0027] In actual application, when the rivet core is inserted into the muzzle 11, the clamping mechanism 2 clamps the rivet core, and then the driving mechanism 4 drives the telescopic rod 41 to move backward in the gun body 1 (i.e., move away from the muzzle 11). The backward pulling of the telescopic rod 41 pulls the tension detector 3 and the clamping mechanism 2 to move backward. At this time, the pulled clamping mechanism 2 also breaks the rivet core; at the same time, at the moment when the core is broken, the telescopic rod 41 and the clamping mechanism 2 respectively pull the tension detector 3 to the maximum, and the tension detector 3 measures the instantaneous tension value of the rivet gun, that is, the tension of the rivet to be broken. After the core is broken, under the action of suction or other external forces, the core can pass through the nail feeding hole 31 of the tension detector 3 and be transferred to the nail storage cavity of the gun body 1 or transferred to the outside of the gun body 1.

[0028] In summary, the existing rivet gun drives the clamping mechanism 2 through the driving mechanism 4 to pull out the nail core of the rivet, and the nail core will be transferred to the nail storage chamber behind the gun body 1 or transferred outside the gun body 1 for collection. In order to realize the real-time tension monitoring of the rivet gun simply and compactly, the present invention adds a tension detector 3 between the driving mechanism 4 and the clamping mechanism 2. When the driving mechanism 4 drives the telescopic rod 41 to pull the tension detector 3 and the clamping mechanism 2, the tension detector 3 is subjected to the tension and measures the tension value of the rivet gun in real time, which is convenient for the operator to judge whether the rivet meets the specification standard, and then judge the riveting quality of the rivet; at the same time, in order to facilitate the transfer of the nail core of the rivet after it is pulled off, a hollow nail feeding through hole 31 is provided on the tension detector 3, so that the nail core after being pulled off can be transferred to a designated position for collection. The structural design of the present invention is simple and compact, and the rivet gun can realize tension monitoring, and the tension monitoring is accurate and timely, which is convenient for the operator to control the tension within a reasonable range, thereby improving the quality and efficiency of riveting.

[0029] In this embodiment, if Figure 1 As shown, the telescopic rod 41 is provided with an output slot 411 connected to the nail feeding through hole 31. The rear end of the gun body 1 of this embodiment is provided with a nail discharging opening 12. In actual application, after the nail core of the rivet is broken, the suction force in the gun body 1 is used by the Venturi principle, and the nail core is transferred to the outside of the gun body 1 in sequence through the nail feeding through hole 31 of the tension detector 3, the output slot 411 of the telescopic rod 41, and the nail discharging opening 12 of the gun body 1 under the action of the suction force.

[0030] In the present technical solution, the gun body 1 is provided with a receiving cavity for receiving the tension detector 3, and the maximum outer diameter of the tension detector 3 is less than or equal to the inner diameter of the receiving cavity. The length of the receiving cavity is greater than the length of the tension detector 3, and the tension detector 3 can move axially in the receiving cavity during operation.

[0031] The tension sensor with a through hole in a suitable range generally has an outer diameter of 70mm to 100mm, which is large in size and weight and is not suitable for installation in a rivet gun. In order to allow the tension detector to be installed in the gun body 1 and reduce the weight of the gun body 1, the inventor designs the outer diameter of the tension detector 3 in the technical solution to be 25mm to 40mm.

[0032] Among the current rivet guns, some have a tension detection function, such as the application number: 201921242591.8, and the patent name: a rivet gun structure with monitoring; in this patent, a pressure sensor is set on the outside of the gun body, and then connected to the hydraulic oil in the gun body through a pipeline to detect the oil pressure during operation, and a slide bar and a displacement sensor are set on the gun head to detect the distance moved by the piston rod during riveting; finally, the displacement of the piston rod and the size of the oil pressure are converted into the tension of the rivet gun during riveting through a formula. However, this structural method has the following disadvantages: First, its tension is calculated through two variables through a formula, and the errors in the two variables during measurement are large, and the accuracy of the obtained values ​​is not high. Second, the structure is cumbersome and complicated, and many accessories are used, and they are all installed on the gun body, which will cause the weight of the gun body to be heavy, and the general weight will exceed 5KG. Then the operator cannot easily pick up the gun body 1 for operation, and it is easy to cause excessive fatigue after long-term operation.

[0033] In this embodiment, the inventor designs the tension detector 3 to have a smaller outer diameter, so that the tension detector 3 can be installed in the gun body 1. The appearance is not bloated, simple and practical, and its weight is relatively light, generally about 2KG. The overall structure of the rivet gun is light, simple and compact. It is convenient for the operator to operate and not easy to get tired. In addition, the tension detector 3 is directly connected to the clamping mechanism 2 and the telescopic rod 41 of the driving mechanism 4. Through a simple mechanical connection method, the tension is directly tested, and its test data is more accurate.

[0034] In the present technical solution, the clamping mechanism 2 includes a connecting sleeve 21 and a clamping assembly. An external threaded rod is provided at one end of the tension detector 3 close to the clamping mechanism 2, and an internal threaded sleeve is provided at one end of the tension detector 3 close to the driving mechanism 4. The nail feeding through hole 31 is located on the central axis of the tension detector 3, and the nail feeding through hole 31 passes through the internal threaded sleeve and the external threaded rod; one end of the connecting sleeve 21 is screwed to the external threaded rod of the tension detector 3, and the other end of the connecting sleeve 21 is connected to the clamping assembly; the telescopic rod 41 of the driving mechanism 4 is screwed to the internal threaded sleeve of the tension detector 3. In practical applications, the clamping assembly is used to clamp the nail core of the rivet. The design of the structure is simple and compact, and the connection method makes the connection between the tension detector 3 and the telescopic rod 41 and the clamping assembly more firm and stable.

[0035] In the present technical solution, the nail clamping mechanism 2 further includes a needle guide tube 22, one end of which is connected to the nail clamping assembly, and the other end of which is sequentially inserted into the nail feeding through hole 31 and the telescopic rod 41. Specifically, the other end of the needle guide tube 22 is inserted into the output slot 411 of the telescopic rod 41.

[0036] In practical applications, the needle guide tube 22 is used to guide the nail core. When the telescopic rod 41 of the driving mechanism 4 pulls the tension detector 3 and pulls the connecting bushing 21, the nail clamping assembly that clamps the nail core will stretch the nail core for a certain distance and then break it. Then, the broken nail core is sucked into the needle guide tube 22 under the action of external force, so that the nail core can quickly pass through the nail feeding through hole 31 and the output groove 411, and finally discharged from the nail discharge port 12 of the gun body 1. The design of the needle guide tube 22 can realize the Venturi principle, so that the nail core can be stably and quickly discharged from the gun body 1 for collection.

[0037] In the present technical solution, the clamping nail assembly includes a claw piece 26, a clamping sleeve 24 disposed in the gun body 1 and connected to the connecting bushing 21, a plug 23 for tightening the claw piece 26, and a spring 27 for providing thrust to the plug 23. The clamping sleeve 24 is provided with an inner tapered hole 25 at one end close to the muzzle 11, and the claw piece 26 is installed in the inner tapered hole 25; the plug 23 is pressed against the side of the claw piece 26 close to the connecting bushing 21; one end of the spring 27 is in contact with the connecting bushing 21, and the other end of the spring 27 is in contact with the plug 23; the plug 23 is connected to the guide needle tube 22 and is hollow. Specifically, in the present embodiment, the guide needle tube 22 and the plug 23 can be detachably connected or integrally formed. The number of the claw pieces 26 is at least two or more.

[0038] In actual application, when the connecting bushing 21 is pulled backward under the drive of the telescopic rod 41, the connecting bushing 21 pulls the clamping sleeve 24 to move away from the muzzle 11, and the spring 27 always pushes the head 23 to press the claw piece 26 in the direction of the muzzle 11. At this time, the clamping sleeve 24 moving backward squeezes the claw piece 26 under the action of the conical surface of the inner tapered hole 25 so that the multiple claw pieces 26 are closed to achieve the function of clamping the nail core. When the connecting bushing 21 is further pulled backward, the inner tapered hole 25 of the clamping sleeve 24 drives the multiple claw pieces 26 to pull backward, thereby breaking the nail core. The broken nail core enters the guide needle tube 22 through the inner hole of the head 23.

[0039] In this technical solution, the tension detector 3 is provided with a signal connection line, and the gun body 1 is provided with a threading groove 13 at a position corresponding to the signal connection line; the outer side of the gun body 1 is provided with a wire protection component 5 for protecting the signal connection line.

[0040] In practical applications, the tension detector 3 is provided with a signal connection line for electrically connecting with an electronic device outside the gun body 1, and the signal connection line will pass through the gun body 1 through the threading groove 13. The threading groove 13 is in a long strip shape, and since the tension detector 3 will move inside the gun body 1, the long threading groove 13 facilitates the movement of the signal connection line. The design of the wire protection component 5 can protect the signal connection line outside the gun body 1 to prevent it from being damaged and affecting the operation of the tension detector 3.

[0041] In the present technical solution, the wire protection assembly 5 includes a first wire protection tube 51, a bend wire protection device and a protection box cover 54. The first wire protection tube 51 is arranged on the outside of the gun body 1, and the axial direction of the first wire protection tube 51 is parallel to the axial direction of the gun body 1; a bend wire protection device is arranged between the wire inlet of the first wire protection tube 51 and the wire outlet of the tension detector 3; the protection box cover 54 is used to cover the first wire protection tube 51 and the bend wire protection device.

[0042] In practical applications, because the signal connection line of the tension detector 3 is perpendicular to the axis direction of the gun body 1 and extends out of the gun body 1, when in use, the signal connection line needs to be bent 90 degrees so that the signal connection line can be parallel to the axis of the gun body 1 and pass through the first wire protection tube 51. The wire bending protection device is used to protect the corners of the signal connection line, and the first wire protection tube 51 is used to protect the signal connection line, thereby achieving all-round and non-dead angle protection of the signal connection line to prevent damage to the signal connection line caused by external collision.

[0043] In the technical solution, the bending wire protection device includes a second wire protection tube 52 and a wire protection clamp block 53. One end of the second wire protection tube 52 is connected to the wire outlet of the tension detector 3, and the other end of the second wire protection tube 52 protrudes out of the gun body 1. One end of the wire protection clamp block 53 clamps the first wire protection tube 51, and the other end of the wire protection clamp block 53 clamps the second wire protection tube 52. Specifically, the wire protection clamp block 53 includes a left clamp block 531 and a right clamp block 532.

[0044] In practical applications, the second wire protection tube 52 is used to protect the signal connection line extending from the wire outlet of the tension detector 3 and the part of the signal connection line behind the corner. The wire protection clamp block 53 is used to fix the first wire protection tube 51 and the second wire protection tube 52, so that when the tension detector 3 moves, the first wire protection tube 51 and the second wire protection tube 52 can keep moving synchronously to prevent the signal connection line from being pulled and damaged.

[0045] In the technical solution, an open slot 521 is provided on one side of the second wire protection tube 52. The design of the open slot 521 is to form an escape space so that the signal connection line can achieve a 90-degree corner in the open slot 521 without interference.

[0046] In the present technical solution, a flange 14 is provided on the outer side of the gun body 1, and a positioning through hole 141 is provided on the flange 14 for the first wire protection tube 51 to pass through. This design allows the first wire protection tube 51 to be positioned so that the first wire protection tube 51 can always move in a straight line along the axis direction of the gun body 1, preventing the first wire protection tube 51 from moving and deviating, thereby more effectively protecting the signal connection line and ensuring the accuracy of the detection data.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A rivet gun with a tension detection function, characterized in that: The invention comprises a gun body (1), a nail clamping mechanism (2), a tension detector (3) and a driving mechanism (4), wherein a muzzle (11) is arranged at one end of the gun body (1), and the nail clamping mechanism (2), the tension detector (3) and the driving mechanism (4) are arranged in sequence along the direction of the gun body (1) away from the muzzle (11); the driving mechanism (4) is provided with a telescopic rod (41), one end of the tension detector (3) is connected to the nail clamping mechanism (2), and the other end of the tension detector (3) is connected to the telescopic rod (41); a nail feeding through hole (31) is arranged in the middle of the tension detector (3); the tension detector (3) is provided with a signal connection line, and a threading groove (13) is arranged at a position of the gun body (1) corresponding to the signal connection line; a wire protection component (5) for protecting the signal connection line is arranged on the outer side of the gun body (1); The nail clamping mechanism (2) comprises a connecting sleeve (21) and a nail clamping assembly; an end of the tension detector (3) close to the nail clamping mechanism (2) is provided with an external threaded rod; an end of the tension detector (3) close to the driving mechanism (4) is provided with an internal threaded sleeve; the nail feeding through hole (31) is located on the central axis of the tension detector (3), and the nail feeding through hole (31) passes through the internal threaded sleeve and the external threaded rod; one end of the connecting sleeve (21) is screwed to the external threaded rod of the tension detector (3), and the other end of the connecting sleeve (21) is connected to the nail clamping assembly; the telescopic rod (41) of the driving mechanism (4) is screwed to the internal threaded sleeve of the tension detector (3); the nail clamping mechanism (2) also comprises a needle guide tube (22), one end of which is connected to the nail clamping assembly; The telescopic rod (41) is provided with an output slot (411) connected to the nail feeding through hole (31), the rear end of the gun body (1) is provided with a nail row opening (12), and the other end of the needle guide tube (22) is inserted into the nail feeding through hole (31) and the output slot (411) of the telescopic rod (41); The wire protection assembly (5) comprises a first wire protection tube (51), a bend wire protection device and a protection box cover (54); the first wire protection tube (51) is arranged on the outside of the gun body (1), and the axial direction of the first wire protection tube (51) is arranged parallel to the axial direction of the gun body (1); a bend wire protection device is arranged between the wire inlet of the first wire protection tube (51) and the wire outlet of the tension detector (3); the protection box cover (54) is used to cover the first wire protection tube (51) and the bend wire protection device; The wire bending protection device comprises a second wire protection tube (52) and a wire protection clamp block (53); one end of the second wire protection tube (52) is connected to the wire outlet of the tension detector (3), and the other end of the second wire protection tube (52) protrudes out of the gun body (1); one end of the wire protection clamp block (53) clamps the first wire protection tube (51), and the other end of the wire protection clamp block (53) clamps the second wire protection tube (52).

2. A rivet gun with a tension detection function according to claim 1, characterized in that: The gun body (1) is provided with a receiving cavity for receiving the tension detector (3), and the maximum outer diameter of the tension detector (3) is less than or equal to the inner diameter of the receiving cavity.

3. The rivet gun with tension detection function according to claim 1, characterized in that: The clamping nail assembly comprises a claw piece (26), a clamping sleeve (24) arranged in the gun body (1) and connected to the connecting bushing (21), a head (23) for pressing the claw piece (26), and a spring (27) for providing a thrust to the head (23); an inner tapered hole (25) is arranged at one end of the clamping sleeve (24) close to the muzzle (11), and the claw piece (26) is installed in the inner tapered hole (25); the head (23) presses against one side of the claw piece (26) close to the connecting bushing (21); one end of the spring (27) abuts against the connecting bushing (21), and the other end of the spring (27) abuts against the head (23); the head (23) is connected to the needle guide tube (22) and is hollow.

4. The rivet gun with tension detection function according to claim 1, characterized in that: An open groove (521) is provided on one side of the second wire protection tube (52).

5. A rivet gun with a tension detection function according to claim 1 or 4, characterized in that: A flange (14) is arranged on the outer side of the gun body (1), and a positioning through hole (141) for the first wire protection tube (51) to pass through is arranged on the flange (14).

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