Wire feed mechanism for welding guns

Abstract

The invention discloses a wire feeding mechanism for a welding gun, which is connected to the entire welding circuit as a conductor to realize the transmission of welding current. The welding wire is output for welding operation. The welding shielding gas is delivered for welding operation. The pressing force of the wire feeding wheel on the welding wire can be adjusted. The welding wire conduit is positioned on the main body, the welding wire transmission is more stable, and the welding wire conduit is easy to replace. The technology integrates a mechanical gas valve. The structure is compact and the volume is small, and the use of the welding gun can effectively reduce the labor intensity.

Description

Technical Field

[0001] The present invention relates to metal arc welding in the field of welding technology, and in particular to a wire feeding mechanism used on a welding gun, which is generally applied to handheld welding guns, such as wire drawing guns and push-drawing guns. Background Art

[0002] The wire feeding mechanism is generally used on a welding machine or a handheld welding gun, such as a wire drawing gun and a push-draw wire gun. The invention is used on a welding gun, especially a handheld welding gun.

[0003] As a handheld tool, its convenience of use should be taken into consideration when developing this type of product, such as small size, light weight, simple operation, and wide application scenarios.

[0004] Currently, this type of technology from different manufacturers has certain limitations.

[0005] 1. Large size, not conducive to welding in certain positions;

[0006] 2. Heavy weight and high labor intensity;

[0007] 3. Complex operation (mainly reflected in the clamping of the welding wire and the adjustment of the clamping force);

[0008] 4. Some scenarios are not convenient to use and are not suitable for use on welding machines without solenoid valves. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides a wire feeding mechanism for a welding gun, which can adjust the pressing force of the wire feeding wheel on the welding wire. The welding wire guide tube is positioned on the main body, the welding wire transmission is more stable, and the welding wire guide tube is easy to replace. A mechanical air valve is integrated. The structure is compact and the volume is small, and the use of the welding gun can effectively reduce the labor intensity.

[0010] The technical solution of the present invention is: a wire feeding mechanism for a welding gun comprises a main body; a welding wire driving assembly, a welding wire pressing force adjusting assembly and a welding wire pressing structure assembly are arranged on the main body;

[0011] The welding wire driving assembly comprises a driving wheel and a driving motor; the driving wheel is arranged above the main body, the outer circumferential surface of the driving wheel is processed with a driving wheel slot capable of clamping the welding wire, the bottom of the driving wheel is connected to the driving motor, and the driving motor drives the rotation to drive the welding wire in the driving wheel slot to move;

[0012] The main body is provided with a welding wire pressing force adjusting component installation hole, and the welding wire pressing force adjusting component is installed in the welding wire pressing force adjusting component installation hole;

[0013] The welding wire pressing force adjusting assembly comprises a welding wire pressing force adjusting knob, a screw and a welding wire pressing force adjusting spring; the welding wire pressing force adjusting spring is installed in the mounting hole of the welding wire pressing force adjusting assembly, the first end of the welding wire pressing force adjusting spring is connected to the first end of the screw, the screw body is connected to the mounting hole of the welding wire pressing force adjusting assembly through a thread, and the second end of the screw is connected to the welding wire pressing force adjusting knob; by rotating the welding wire pressing force adjusting knob, the screw can be driven to move back and forth in the mounting hole of the welding wire pressing force adjusting assembly, thereby driving the welding wire pressing force adjusting spring to move back and forth in the mounting hole of the welding wire pressing force adjusting assembly;

[0014] The welding wire clamping structure assembly includes a clamping arm, a clamping wheel, a spring sheet, a clamping arm rotation fixing screw and a spring sheet fixing screw; the first end of the spring sheet is fixed to the main body by the spring sheet fixing screw; the middle part of the clamping arm is fixed to the main body by the clamping arm rotation fixing screw, and the clamping arm can rotate around the clamping arm rotation fixing screw; the first end of the clamping arm is connected to the second end of the welding wire clamping force adjustment spring, and the clamping wheel is installed on the second end of the clamping arm; the second end of the clamping arm is also provided with a thrust arm, and the bottom of the thrust arm is provided with a The spring piece of the connection limit position; when the welding wire is in a non-compression state, the welding wire is clamped in the driving wheel slot of the driving wheel and moves with the driving wheel, and the two ends of the clamping arm are fixed and limited by the welding wire clamping force adjusting spring and the spring piece support; when the welding wire needs to be compressed, the spring piece is pressed so that the second end of the spring piece is disengaged from the spring piece limit position, and the clamping arm is pushed by the elastic force of the welding wire clamping force adjusting spring so that the second end of the clamping arm rotates toward the direction close to the driving wheel until the clamping wheel contacts the welding wire clamped in the driving wheel and compresses the welding wire.

[0015] Furthermore, a gas passage running through the entire body is provided on the body along the length direction of the body;

[0016] The main body is also provided with a gas valve structure component mounting hole, the gas valve structure component mounting hole is connected with the gas channel, a gas valve structure component is installed in the gas valve structure component mounting hole, and the gas valve structure component can open or close the gas channel.

[0017] Furthermore, the gas valve structural assembly includes a gas valve cover, a gas valve spring and a gas valve stem;

[0018] The mounting hole of the air valve structure assembly includes a large cylindrical hole at the top, a transition step surface in the middle and a small cylindrical hole at the bottom;

[0019] The sealing cylindrical surface at the top of the air valve sealing cover can be installed and positioned by interference fit with the top of the large cylindrical hole; a first annular groove for installing a sealing ring is provided on the outer circumferential surface of the air valve sealing cover, and after the sealing ring is installed in the first annular groove, it can be sealed by interference fit with the large cylindrical hole;

[0020] The top of the valve stem is provided with a second annular groove for installing a sealing ring, and after the sealing ring is installed in the second annular groove, it can be sealed with the large cylindrical hole by interference fit; the lower end of the valve stem is provided with a third annular groove for installing a sealing ring and a fourth annular groove for installing a sealing ring, and after the sealing ring is installed in the third annular groove and the fourth annular groove, it can be sealed with the small cylindrical hole by interference fit; the bottom of the valve stem protrudes from the valve structure assembly installation hole;

[0021] A valve stem blind hole is provided at the top end of the air valve stem, a sealing cover blind hole is provided at the bottom end of the air valve cover, and two ends of the air valve spring are respectively installed in the valve stem blind hole and the sealing cover blind hole; when the air valve stem is not subject to force, the elastic force of the air valve spring supports the air valve stem to move downward to seal the gas passage; when the bottom of the rod body of the air valve stem is subject to force to move upward, the air valve stem opens the gas passage.

[0022] Furthermore, a wire feeding tube positioning structure component installation hole is provided on the main body, and a wire feeding tube positioning structure component is installed in the wire feeding tube positioning structure component installation hole;

[0023] The wire feeding tube positioning structure assembly comprises a guide rod, a guide rod fixing screw, a positioning cap and a positioning cap fixing screw;

[0024] The guide rod is installed in the mounting hole of the wire feeding tube positioning structure assembly and is fixed by the guide rod fixing screw; one end of the welding wire guide tube is fixedly connected to the positioning cap by a thread, and then the other end of the welding wire guide tube is inserted from one end of the guide rod until the positioning cap is brought to the corresponding matching position on the guide rod, and then the positioning cap is fixed to the guide rod by the positioning cap fixing screw.

[0025] Furthermore, the first end of the screw is a screw boss that can be connected to the first end of the welding wire clamping force adjusting spring, the middle part of the screw body is processed with a screw external thread that can be matched with the mounting hole of the welding wire clamping force adjusting assembly, and the second end of the screw is processed with a screw limiting plane that can be matched with the welding wire clamping force adjusting knob for limiting the position.

[0026] The beneficial effects of the present invention are: providing a wire feeding mechanism for a welding gun, which is connected to the entire welding circuit as a conductor to realize the transmission of welding current. Outputting welding wire for welding operation. Delivering welding shielding gas for welding operation. The pressing force of the wire feeding wheel on the welding wire can be adjusted. The welding wire conduit is positioned on the main body, the welding wire transmission is more stable, and the welding wire conduit is easy to replace. The technology integrates a mechanical gas valve. The structure is compact and the volume is small, and the use of the welding gun can effectively reduce the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the wire feeding mechanism used in the welding gun;

[0028] Figure 2 Assembly drawing of welding wire clamping structure assembly;

[0029] Figure 3 The figure is a cross-sectional view of a welding wire pressing force adjustment component;

[0030] Figure 4 This is an exploded view of the welding wire clamping force adjustment component;

[0031] Figure 5 This is the structural diagram of the clamping arm;

[0032] Figure 6 This is the structural diagram of the clamping arm;

[0033] Figure 7 It is the structure diagram of the shrapnel;

[0034] Figure 8 It is the screw structure diagram;

[0035] Fig. 9 This is a schematic diagram of opening the clamping arm;

[0036] Fig.10 It is a schematic diagram of a closed clamping arm;

[0037] Fig.11 This is a schematic diagram of the welding wire being clamped in the driving wheel slot;

[0038] Fig.12 It is the principle diagram of the clamping arm and the spring;

[0039] Fig.13 It is an exploded view of the gas valve structure assembly;

[0040] Fig.14 It is a cross-sectional view of the gas valve structure component;

[0041] Fig.15 It is the installation hole structure diagram of the gas valve structure component;

[0042] Fig.16 The gas valve spring is in a compressed state, and the valve stem closes the gas passage under the action of the spring force;

[0043] Fig.17 To press the valve stem, the gas valve spring continues to be compressed and the gas passage opens;

[0044] Fig.18 This is the gas valve cover structure diagram;

[0045] Fig.19 This is the valve stem structure diagram;

[0046] Fig. 20 Schematic diagram of gas channel;

[0047] Fig.21 This is a cross-sectional view of the wire feed tube positioning structural components.

[0048] In the figure: 1 is welding wire, 2 is wire feeding tube, 3 is welding wire conduit, 4 is clamp, 5 is clamping wheel, 6 is driving wheel, 7 is driving motor;

[0049] 301 is a gas valve cover, 302 is a gas valve spring, and 303 is a gas valve stem;

[0050] 205 is a gas channel;

[0051] 401 is a rotation fixing screw of the clamping arm, 402 is a clamping arm, 403 is a spring fixing screw, and 404 is a spring;

[0052] 501 is a welding wire pressing force adjusting spring, 502 is a screw rod, and 503 is a welding wire pressing force adjusting knob;

[0053] 601 is a guide rod, 602 is a guide rod fixing screw, 603 is a positioning cap fixing screw, and 604 is a positioning cap;

[0054] 701 is a large cylindrical hole, 702 is a transition step surface, 703 is a small cylindrical hole, and 704 is a sealing ring;

[0055] 801 is the first annular groove, 802 is the blind hole of the cover, 803 is the cylindrical surface of the cover, 804 is the blind hole of the valve stem, 805 is the second annular groove, 806 is the third annular groove, and 807 is the fourth annular groove;

[0056] 903 is a thrust arm, 904 is a spring limit stop;

[0057] 1001 is the screw boss, 1002 is the screw, and 1003 is the screw limiting plane.

[0058] A-Press the spring. DETAILED DESCRIPTION

[0059] The present invention will be further described below in conjunction with the accompanying drawings.

[0060] like Figure 1As shown, the wire feeding mechanism for a welding gun comprises a main body on which a welding wire driving assembly, a welding wire pressing force adjusting assembly, a welding wire pressing structure assembly, an air valve structure assembly and a wire feeding tube positioning structure assembly are arranged.

[0061] The welding wire driving assembly includes a driving wheel 6 and a driving motor 7. The driving wheel 6 is arranged above the main body, and the outer circumferential surface of the driving wheel 6 is processed with a driving wheel slot for clamping the welding wire. The bottom of the driving wheel 6 is connected to the driving motor 7, and the driving motor 7 drives the rotation to drive the welding wire in the driving wheel slot to move.

[0062] like Figure 2-12 As shown, a welding wire pressing force adjusting component installation hole is opened on the main body, and the welding wire pressing force adjusting component is installed in the welding wire pressing force adjusting component installation hole.

[0063] The welding wire pressing force adjustment component includes a welding wire pressing force adjustment knob 503, a screw rod 502 and a welding wire pressing force adjustment spring 501. The welding wire pressing force adjustment spring 501 is installed in the mounting hole of the welding wire pressing force adjustment component, the first end of the welding wire pressing force adjustment spring 501 is connected to the first end of the screw rod 502, the body of the screw rod 502 is connected to the mounting hole of the welding wire pressing force adjustment component through a thread, and the second end of the screw rod 502 is connected to the welding wire pressing force adjustment knob 503. By rotating the welding wire pressing force adjustment knob 503, the screw rod 502 can be driven to move back and forth in the mounting hole of the welding wire pressing force adjustment component, thereby driving the welding wire pressing force adjustment spring 501 to move back and forth in the mounting hole of the welding wire pressing force adjustment component. Preferably, the first end of the screw 502 is a screw boss 1001 that can be connected to the first end of the welding wire clamping force adjusting spring 501, the middle part of the screw body 502 is processed with a screw external thread 1002 that can be matched with the mounting hole of the welding wire clamping force adjusting assembly, and the second end of the screw 502 is processed with a screw limiting plane 1003 that can be matched with the welding wire clamping force adjusting knob 503 for limiting positioning.

[0064] The welding wire clamping structure assembly includes a clamping arm 402, a clamping wheel 5, a spring 404, a clamping arm rotation fixing screw 401 and a spring fixing screw 403. The first end of the spring 404 is fixed to the main body by the spring fixing screw 403. The middle part of the clamping arm 402 is fixed to the main body by the clamping arm rotation fixing screw 401, and the clamping arm 402 can rotate around the clamping arm rotation fixing screw 401. The first end of the clamping arm 402 is connected to the second end of the welding wire clamping force adjustment spring 501, and the clamping wheel 5 is installed at the second end of the clamping arm 402. The second end of the clamping arm 402 is also provided with a thrust arm 903, and the bottom of the thrust arm 903 is provided with a spring limit stop 904 that can be matched with the second end of the spring 404 to limit the position. When the welding wire is in a non-compression state, the welding wire is clamped in the driving wheel slot of the driving wheel 6 and moves with the driving wheel, and the two ends of the clamping arm 402 are fixed and limited by the welding wire clamping force adjustment spring 501 and the spring sheet 404. When the welding wire needs to be compressed, the spring sheet 404 is pressed so that the second end of the spring sheet 404 is disengaged from the spring sheet limit stop 904, and the clamping arm 402 is pushed by the elastic force of the welding wire clamping force adjustment spring 501 so that the second end of the clamping arm 402 rotates toward the direction close to the driving wheel 6 until the clamping wheel 5 contacts the welding wire clamped in the driving wheel 6 and compresses the welding wire.

[0065] like Figure 13-20 As shown, a gas passage 205 is provided on the main body along the length direction of the main body and runs through the entire main body.

[0066] The main body is also provided with a gas valve structure component mounting hole, which is communicated with the gas channel 205 . A gas valve structure component is installed in the gas valve structure component mounting hole, and the gas valve structure component can open or close the gas channel 205 .

[0067] The gas valve structural component includes a gas valve cover 301 , a gas valve spring 302 and a gas valve stem 303 .

[0068] The installation hole of the air valve structure assembly includes a large cylindrical hole 701 at the top, a transition step surface 702 in the middle, and a small cylindrical hole 703 at the bottom.

[0069] The sealing cylindrical surface 803 at the top of the gas valve sealing cover 301 can be installed and positioned by interference fit with the top of the large cylindrical hole 701. A first annular groove 801 for installing a sealing ring is provided on the outer circumferential surface of the gas valve sealing cover 301. After the sealing ring is installed in the first annular groove 801, it can be sealed by interference fit with the large cylindrical hole 701.

[0070] The top of the valve stem 303 is provided with a second annular groove 805 for installing a sealing ring. After the sealing ring is installed in the second annular groove 805, it can be sealed by interference fit with the large cylindrical hole 701. The lower end of the valve stem 303 is provided with a third annular groove 806 and a fourth annular groove 807 for installing a sealing ring. After the sealing ring is installed in the third annular groove 806 and the fourth annular groove 807, it can be sealed by interference fit with the small cylindrical hole 703. The bottom of the valve stem 303 protrudes from the valve structure assembly installation hole.

[0071] The top of the gas valve stem 303 is provided with a valve stem blind hole 804, the bottom of the gas valve cover 301 is provided with a cover blind hole 802, and the two ends of the gas valve spring 302 are respectively installed in the valve stem blind hole 804 and the cover blind hole 802. When the gas valve stem 303 is not subjected to force, the elastic force of the gas valve spring 302 supports the gas valve stem 303 to move downward to seal the gas passage 205. When the bottom of the rod body of the gas valve stem 303 is subjected to force to move upward, the gas valve stem 303 opens the gas passage 205.

[0072] like Fig.21 As shown, a wire feeding tube positioning structure assembly installation hole is opened on the main body, and a wire feeding tube positioning structure assembly is installed in the wire feeding tube positioning structure assembly installation hole.

[0073] The wire feeding tube positioning structure assembly includes a guide rod 601 , a guide rod fixing screw 602 , a positioning cap 604 and a positioning cap fixing screw 603 .

[0074] The guide rod 601 is installed in the installation hole of the wire feeding tube positioning structure assembly and fixed by the guide rod fixing screw 602. One end of the welding wire conduit 3 is fixedly connected with the positioning cap 604 by threading, and then the other end of the welding wire conduit 3 is inserted from one end of the guide rod 601 until the positioning cap 604 is brought to the corresponding matching position on the guide rod 601, and then the positioning cap 604 is fixed to the guide rod 601 by the positioning cap fixing screw 603.

[0075] When in use, check whether the clamping arm is in the clamping state or the closed state. If it is in the closed state, open the clamping arm. At this time, the spring will pop up and snap into the spring limit stop on the bottom of the clamping arm. Then the welding wire is introduced through the wire feeding tube and passes through the driving wheel to the end of the gun neck. The driving wheel is installed on the motor. When the motor works, the welding wire is continuously output.

[0076] When the welding wire needs to be compressed, check and confirm that the welding wire is in the groove on the driving wheel, press the spring sheet, and the spring sheet will disengage from the gear position on the clamping arm. The clamping arm will rotate around its positioning axis at a certain angle under the action of the spring force. When the clamping wheel on the clamping arm contacts the welding wire in the groove on the driving wheel, the welding wire is compressed.

[0077] When the welding wire clamping force needs to be adjusted, turn the welding wire clamping force adjustment knob, the compression of the welding wire clamping force adjustment spring will increase or decrease, and the elastic force of the welding wire clamping force adjustment spring on the clamping arm will increase or decrease, so as to adjust the clamping force of the clamping wheel on the welding wire to meet the needs of different application scenarios.

[0078] The control method of welding shielding gas on and off, the gas is delivered to the main body through the cable assembly. The main body and other parts form a gas valve. The sealing ring is installed on the cover and the valve stem. At this time, the gas valve spring is in a compressed state. The gas valve spring applies pressure to the valve stem. The valve stem and the main body form a sealed cavity, and the gas is sealed in the body. Press the valve stem of the gas valve, the valve stem moves, and the gas valve spring continues to be compressed. At this time, the valve stem and the main body no longer form a sealed cavity, and the gas flows out.

[0079] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wire feeding mechanism for a welding gun, characterized in that: It comprises a main body; the main body is provided with a welding wire driving assembly, a welding wire pressing force adjusting assembly and a welding wire pressing structure assembly; The welding wire drive assembly comprises a driving wheel (6) and a driving motor (7); the driving wheel (6) is arranged above the main body, the outer circumferential surface of the driving wheel (6) is processed with a driving wheel slot capable of clamping the welding wire, the bottom of the driving wheel (6) is connected to the driving motor (7), and the driving motor (7) drives the driving wheel (6) to rotate, thereby driving the welding wire in the driving wheel slot to move; The main body is provided with a welding wire pressing force adjusting component installation hole, and the welding wire pressing force adjusting component is installed in the welding wire pressing force adjusting component installation hole; The welding wire pressing force adjustment component comprises a welding wire pressing force adjustment knob (503), a screw rod (502) and a welding wire pressing force adjustment spring (501); the welding wire pressing force adjustment spring (501) is installed in the welding wire pressing force adjustment component installation hole, the first end of the welding wire pressing force adjustment spring (501) is connected to the first end of the screw rod (502), the screw rod (502) body is connected to the welding wire pressing force adjustment component installation hole through a thread, and the second end of the screw rod (502) is connected to the welding wire pressing force adjustment knob (503); by rotating the welding wire pressing force adjustment knob (503), the screw rod (502) can be driven to move back and forth in the welding wire pressing force adjustment component installation hole, thereby driving the welding wire pressing force adjustment spring (501) to move back and forth in the welding wire pressing force adjustment component installation hole; The welding wire clamping structure assembly comprises a clamping arm (402), a clamping wheel (5), a spring (404), a clamping arm rotation fixing screw (401) and a spring fixing screw (403); the first end of the spring (404) is fixed to the main body by the spring fixing screw (403); the middle part of the clamping arm (402) is fixed to the main body by the clamping arm rotation fixing screw (401), and the clamping arm (402) can rotate around the clamping arm rotation fixing screw (401); the first end of the clamping arm (402) is connected to the second end of the welding wire clamping force adjustment spring (501), and the second end of the clamping arm (402) is installed with the clamping wheel (5); the second end of the clamping arm (402) is also provided with a thrust arm (903), and the bottom of the thrust arm (903) is provided with a spring that can be used to adjust the welding wire clamping force. a spring-piece limit stop (904) matched with the second end of the spring piece (404) for limiting the position; when the welding wire is in a non-compressed state, the welding wire is clamped in the driving wheel clamping slot of the driving wheel (6) and moves with the driving wheel, and the two ends of the clamping arm (402) are fixed and limited by the welding wire clamping force adjustment spring (501) and the spring piece (404); when the welding wire needs to be compressed, the spring piece (404) is pressed so that the second end of the spring piece (404) is disengaged from the spring-piece limit stop (904), and the clamping arm (402) is pushed by the elastic force of the welding wire clamping force adjustment spring (501) so that the second end of the clamping arm (402) rotates in a direction close to the driving wheel (6) until the clamping wheel (5) contacts the welding wire clamped in the driving wheel (6) and compresses the welding wire.

2. The wire feeding mechanism for a welding gun according to claim 1, characterized in that: The main body is provided with a gas passage (205) extending through the entire main body along the length direction of the main body; The main body is also provided with a gas valve structure component mounting hole, the gas valve structure component mounting hole is communicated with the gas channel (205), a gas valve structure component is mounted in the gas valve structure component mounting hole, and the gas valve structure component can open or close the gas channel (205).

3. The wire feeding mechanism for a welding gun according to claim 2, characterized in that: The gas valve structural component comprises a gas valve cover (301), a gas valve spring (302) and a gas valve stem (303); The air valve structural component mounting hole comprises a large cylindrical hole (701) at the top, a transition step surface (702) in the middle, and a small cylindrical hole (703) at the bottom; The sealing cylindrical surface (803) at the top of the air valve sealing cover (301) can be installed and positioned by interference fit with the top of the large cylindrical hole (701); a first annular groove (801) for installing a sealing ring is provided on the outer circumferential surface of the air valve sealing cover (301); after the sealing ring is installed in the first annular groove (801), it can be sealed by interference fit with the large cylindrical hole (701); The top of the rod body of the gas valve stem (303) is provided with a second annular groove (805) for installing a sealing ring, and after the sealing ring is installed in the second annular groove (805), it can be sealed by interference fit with the large cylindrical hole (701); the lower end of the rod body of the gas valve stem (303) is provided with a third annular groove (806) for installing a sealing ring and a fourth annular groove (807) for installing a sealing ring, and after the sealing ring is installed in the third annular groove (806) and the fourth annular groove (807), they can be sealed by interference fit with the small cylindrical hole (703); the bottom of the rod body of the gas valve stem (303) protrudes from the mounting hole of the gas valve structure component; A valve stem blind hole (804) is formed at the top end of the gas valve stem (303), a cover blind hole (802) is formed at the bottom end of the gas valve cover (301), and two ends of the gas valve spring (302) are respectively installed in the valve stem blind hole (804) and the cover blind hole (802); when the gas valve stem (303) is not subjected to force, the elastic force of the gas valve spring (302) supports the gas valve stem (303) to move downward to seal the gas passage (205); when the bottom of the rod body of the gas valve stem (303) is subjected to force to move upward, the gas valve stem (303) opens the gas passage (205).

4. The wire feeding mechanism for a welding gun according to claim 1, characterized in that: The main body is provided with a wire feeding tube positioning structure component installation hole, and the wire feeding tube positioning structure component is installed in the wire feeding tube positioning structure component installation hole; The wire feeding tube positioning structure assembly comprises a guide rod (601), a guide rod fixing screw (602), a positioning cap (604) and a positioning cap fixing screw (603); The guide rod (601) is installed in the installation hole of the wire feeding tube positioning structure assembly and fixed by the guide rod fixing screw (602); one end of the welding wire guide tube (3) is fixedly connected to the positioning cap (604) by means of a thread, and then the other end of the welding wire guide tube (3) is inserted from one end of the guide rod (601) until the positioning cap (604) is brought to the corresponding matching position on the guide rod (601), and then the positioning cap (604) is fixed to the guide rod (601) by means of the positioning cap fixing screw (603).

5. The wire feeding mechanism for a welding gun according to claim 1, characterized in that: The first end of the screw rod (502) is a screw rod boss (1001) that can be connected to the first end of the welding wire clamping force adjustment spring (501), the middle part of the screw rod (502) body is processed with a screw rod external thread (1002) that can be matched with the welding wire clamping force adjustment component installation hole, and the second end of the screw rod (502) is processed with a screw rod limiting plane (1003) that can be matched with the welding wire clamping force adjustment knob (503) for limiting.

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