CN220178378U - Gas shielded welding gun - Google Patents

Abstract

The utility model provides a gas shielded welding gun, comprising: the welding gun comprises a welding gun main body, a welding gun pipe section and a protective sleeve, wherein the welding gun main body comprises a welding gun pipe section and a protective sleeve which are connected with each other; the contact tip assembly is movably arranged so as to extend out of the protective sleeve or retract into the protective sleeve; the gas supply pipe is used for conveying welding protective gas and comprises a gas supply pipe section and a cooling pipe section which are communicated with each other, the gas supply pipe section is arranged in the welding gun pipe section and the contact tip assembly in a penetrating mode, the cooling pipe section is arranged between the contact tip assembly and the protective sleeve and is arranged on the outer wall of the contact tip assembly, and the outlet of the cooling pipe section is communicated with the cavity of the protective sleeve. By the technical scheme provided by the utility model, the problems that the relative positions of the contact tip assembly and the welding gun main body in the prior art are not adjustable and the utilization rate of welding shielding gas is low can be solved.

Description

Gas shielded welding gun

Technical Field

The utility model relates to the technical field of gas shielded welding, in particular to a gas shielded welding gun.

Background

The welding port of the gas shielded welding gun in the prior art is usually positioned at the end part of the contact tip assembly, and because the relative position of the contact tip assembly and the welding gun main body is not adjustable, in some special welding situations, such as when a welding groove is relatively narrow, the contact tip assembly is difficult to extend into a welding position due to the influence of the size of the welding gun main body, and the welding effect is influenced. On the other hand, in the gas shielded welding gun of the prior art, the welding shielding gas conveyed by the gas feeding pipe generally adopts CO ₂ And the gas is used for protecting the welding position and assisting the welding, but the welding protection gas in the prior art only assists the welding, so that the utilization rate is low.

Disclosure of Invention

The utility model provides a gas shielded welding gun, which aims to solve the problems that the relative positions of a conductive nozzle assembly and a welding gun main body in the prior art are not adjustable and the utilization rate of welding shielding gas is low.

In order to solve the above problems, the present utility model provides a gas shielded welding gun comprising: the welding gun comprises a welding gun main body, a welding gun pipe section and a protective sleeve, wherein the welding gun main body comprises a welding gun pipe section and a protective sleeve which are connected with each other; the contact tip assembly is movably arranged so as to extend out of the protective sleeve or retract into the protective sleeve; the gas supply pipe is used for conveying welding protective gas and comprises a gas supply pipe section and a cooling pipe section which are communicated with each other, the gas supply pipe section is arranged in the welding gun pipe section and the contact tip assembly in a penetrating mode, the cooling pipe section is arranged between the contact tip assembly and the protective sleeve and is arranged on the outer wall of the contact tip assembly, and the outlet of the cooling pipe section is communicated with the cavity of the protective sleeve.

Further, the contact tip assembly includes a contact tip holder and a welding contact tip, the welding contact tip is inserted at one end of the contact tip holder, the cooling tube section is a spiral tube section and is wound around the outer periphery of the contact tip holder, and one end of the welding gun tube section, which faces the protection sleeve, is provided with a locking assembly for restricting movement of the contact tip holder, so as to lock or unlock the contact tip assembly.

Further, the locking assembly comprises a locking ring, the locking ring is sleeved on the contact tip seat, the locking ring is provided with a locking end, the radial size of the locking end is adjustable to lock or loosen the contact tip assembly, and the inner wall of the protection sleeve is detachably abutted with the outer peripheral surface of the locking ring to adjust the radial size of the locking end.

Further, the protection sleeve is movably sleeved at one end of the welding gun pipe section, the protection sleeve comprises a sleeved section, a locking matching section and a protection section which are sequentially connected, the radial size of the sleeved section is larger than that of the protection section, the radial size of the locking matching section gradually decreases in the direction of the sleeved section towards the protection section, the sleeved section and the welding gun pipe section are in sleeved matching, the cooling pipe section is located in the protection section, and the locking matching section and the locking assembly are detachably abutted to control the locking assembly to lock or loosen the conductive nozzle assembly.

Further, the welding gun pipe section is provided with external threads, the protection sleeve is provided with internal threads, and the protection sleeve is in threaded connection with the welding gun pipe section.

Further, welder pipeline section is including rotating adjusting part, fixed section and nozzle segment, and protective case and nozzle segment deviate from the one end connection of fixed section, and the electric conduction mouth subassembly wears to establish in the nozzle segment, and fixed section and nozzle segment are connected through rotating adjusting part, rotate adjusting part and are used for adjusting the angle between fixed section and the nozzle segment.

Further, the rotation adjusting assembly comprises a ball head piece and a positioning piece, one end of the fixing section is provided with a ball groove, the ball head piece is arranged at one end of the nozzle section and can be rotatably arranged in the ball groove, or one end of the nozzle section is provided with a ball groove, and the ball head piece is arranged at one end of the fixing section and can be rotatably arranged in the ball groove; the fixing section is provided with a positioning hole communicated with the spherical groove, and the positioning piece is movably arranged in the positioning hole in a penetrating manner and is abutted with the ball head piece so as to limit the position of the ball head piece in the spherical groove.

Further, the gas shielded welding gun further comprises a wire feeding mechanism, the wire feeding mechanism comprises a roller assembly, a gap adjusting assembly and a fixing assembly, the side wall of the welding gun pipe section is provided with a mounting groove, the fixing assembly is arranged on the mounting groove, the roller assembly is located in a cavity of the welding gun pipe section and is arranged on the fixing assembly and/or the gap adjusting assembly, the roller assembly is provided with a wire feeding gap used for penetrating a welding wire, and the gap adjusting assembly is arranged on the fixing assembly and can adjust the size of the wire feeding gap.

Further, the roller assembly comprises a first roller group and a second roller group which extend along the radial direction of the welding gun pipe section, the first roller group and the second roller group form a wire feeding gap along the radial gap of the welding gun pipe section, the second roller group is rotatably arranged on the fixing assembly, the gap adjusting assembly comprises a roller seat and an adjusting screw, the first roller group is arranged on the roller seat, and the adjusting screw penetrates through the fixing assembly and is in threaded connection with the fixing assembly so as to adjust the distance between the first roller group and the second roller group.

Further, the wire feeding mechanism further comprises a driving assembly, wherein the driving assembly is arranged on the fixing assembly and is in driving connection with the roller assembly so as to drive the roller assembly to rotate and convey welding wires in the wire feeding gap.

By applying the technical scheme of the utility model, the utility model provides a gas shielded welding gun, which comprises the following steps: the welding gun comprises a welding gun main body, a welding gun pipe section and a protective sleeve, wherein the welding gun main body comprises a welding gun pipe section and a protective sleeve which are connected with each other; the contact tip assembly is movably arranged so as to extend out of the protective sleeve or retract into the protective sleeve; the gas supply pipe is used for conveying welding protective gas and comprises a gas supply pipe section and a cooling pipe section which are communicated with each other, the gas supply pipe section is arranged in the welding gun pipe section and the contact tip assembly in a penetrating mode, the cooling pipe section is arranged between the contact tip assembly and the protective sleeve and is arranged on the outer wall of the contact tip assembly, and the outlet of the cooling pipe section is communicated with the cavity of the protective sleeve. By adopting the scheme, through the movement of the contact tip assembly relative to the welding gun main body, the contact tip assembly can extend out of the protective sleeve or retract into the protective sleeve according to actual welding working conditions, the situation that the contact tip assembly is difficult to extend into a welding position and further influences a welding effect due to the size influence of the welding gun main body when a welding groove is narrower in the prior art is avoided, and the applicability of the gas shielded welding gun is improved. Further, the cooling pipe section of the air supply pipe is arranged around the contact tip assembly and is communicated with the cavity in the protective sleeve, the low-temperature welding protective gas firstly passes through the air supply pipe section and flows into the cooling pipe section, the cooling of welding flux or welding wires inside the contact tip assembly is realized through the flow in the cooling pipe section, and then the welding protective gas flows out from the cooling pipe section to the protective sleeve and plays an auxiliary welding effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic diagram of a gas shielded welding gun according to an embodiment of the present utility model;

FIG. 2 shows a cross-sectional view of the gas shielded welding gun of FIG. 1;

FIG. 3 illustrates a cross-sectional view of the gas shielded welding gun of FIG. 1 from another perspective;

FIG. 4 is a schematic view showing the structure of a locking ring in the gas shielded welding gun of FIG. 1;

figure 5 shows a cross-sectional view of the locking ring of figure 4.

Wherein the above figures include the following reference numerals:

10. a welding gun main body; 11. a welding gun pipe section; 111. a locking ring; 1112. a locking end; 112. a fixed section; 113. a nozzle section; 1131. a transfer section; 1132. a bakelite section; 1133. a brass ring; 114. a rotation adjustment assembly; 1141. a ball head member; 1142. a positioning piece; 12. a protective sleeve; 121. a sleeving section; 122. locking the matching section; 123. a protection section;

20. a contact tip assembly; 21. a contact tip holder; 22. welding the conductive nozzle;

30. an air supply pipe; 31. a gas supply pipe section; 311. a first pipe section; 312. a second pipe section; 32. cooling the pipe section;

40. a wire feeding mechanism; 41. a roller assembly; 411. a first roller set; 412. a second roller set; 42. a gap adjustment assembly; 421. a roller seat; 422. adjusting a screw; 43. a fixing assembly; 431. a first fixing member; 432. a second fixing member; 433. a gasket; 44. a drive assembly; 441. a bracket; 442. and driving the motor.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, an embodiment of the present utility model provides a gas shielded welding gun including: a torch body 10, the torch body 10 including a torch section 11 and a protection sleeve 12 connected to each other; a contact tip assembly 20, a portion of the contact tip assembly 20 being disposed through the welding gun tube segment 11, another portion of the contact tip assembly 20 being disposed through the protective sleeve 12, the contact tip assembly 20 being movably disposed so as to extend out of the protective sleeve 12 or retract into the protective sleeve 12; the gas supply pipe 30 is used for conveying welding shielding gas, the gas supply pipe 30 comprises a gas supply pipe section 31 and a cooling pipe section 32 which are communicated with each other, the gas supply pipe section 31 is arranged in the welding gun pipe section 11 and the contact tip assembly 20 in a penetrating mode, the cooling pipe section 32 is arranged between the contact tip assembly 20 and the protection sleeve 12 and is arranged on the outer wall of the contact tip assembly 20, and the outlet of the cooling pipe section 32 is communicated with the cavity of the protection sleeve 12.

In this embodiment, through the movement of the contact tip assembly 20 relative to the welding gun main body 10, the contact tip assembly 20 can extend out of the protection sleeve 12 or retract into the protection sleeve 12 according to actual welding conditions, so that the situation that the contact tip assembly 20 is difficult to extend into a welding position to affect a welding effect due to the influence of the size of the welding gun main body 10 when a welding groove is narrower in the prior art is avoided, and the applicability of the gas protection welding gun is improved. Further, the cooling tube section 32 of the air supply tube 30 is disposed around the contact tip assembly 20 and is communicated with the cavity in the protective sleeve 12, the low-temperature welding protective gas firstly passes through the air supply tube section 31 and flows into the cooling tube section 32, the welding flux or welding wire inside the contact tip assembly 20 is cooled through the flow in the cooling tube section 32, and then the welding protective gas flows out from the cooling tube section 32 to the protective sleeve 12 and plays an auxiliary welding effect.

As shown in fig. 2 to 5, the contact tip assembly 20 includes a contact tip holder 21 and a welding contact tip 22, the welding contact tip 22 is provided at one end of the contact tip holder 21 in a penetrating manner, the cooling tube section 32 is a spiral tube section and is wound around the outer circumference of the contact tip holder 21, one end of the welding gun tube section 11 facing the protection sleeve 12 has a locking assembly for restricting movement of the contact tip assembly 20, and the locking assembly is used for locking or releasing the contact tip assembly 20.

In this embodiment, the contact tip seat 21 and the welding contact tip 22 are connected end to end and have fixed relative positions, and the welding contact tip 22 can extend out of the protective sleeve 12 or retract into the protective sleeve 12 according to actual conditions, so that the applicability of the gas shielded welding gun is improved. The tightness of the contact tip seat 21 is limited by the locking assembly so as to limit the movement of the contact tip assembly 20, avoid the condition that the welding is affected due to random movement of the welding contact tip 22 in the welding gun main body 10, and ensure the reliability and stability of the gas shielded welding gun. Further, the cooling tube section 32 is designed as a spiral tube section, so that the arrangement and processing of the cooling tube section 32 are facilitated while the heat exchange effect of the cooling tube section 32 on the contact tip assembly 20 is ensured. The air supply pipe 30 in this embodiment is a red copper hose having a diameter of 5 mm.

Specifically, the locking assembly includes a locking ring 111, the locking ring 111 is sleeved on the contact tip seat 21, the locking ring 111 has a locking end 1112, a radial dimension of the locking end 1112 is adjustable to lock or unlock the contact tip assembly 20, and an inner wall of the protection sleeve 12 and an outer circumferential surface of the locking ring 111 are detachably abutted to adjust the radial dimension of the locking end 1112.

In the present embodiment, the contact tip seat 21 passes through the locking ring 111 and is in limit fit with the inner ring of the locking ring 111, when the contact tip assembly 20 needs to be locked, the radial dimension of the locking end 1112 becomes smaller, and the contact tip seat 21 is abutted with and clamped on the contact tip seat 21 in the circumferential direction, so that the movement of the contact tip seat 21 and the welding contact tip 22 in the axial direction of the welding gun pipe section 11 is limited; when it is desired to loosen the contact tip assembly 20, the radial dimension of the locking end 1112 becomes larger and separates its abutment with the contact tip holder 21, thereby making the contact tip holder 21 and the welding contact tip 22 connected to each other movable in the axial direction of the gun segment 11. It will be appreciated that when the radial dimension of the locking end 1112 is equal to the outer diameter of the contact tip holder 21 and there is a continuing trend of decreasing, the locking end 1112 locks the contact tip holder 21, and when the radial dimension of the locking end 1112 is greater than the contact tip holder 21, the contact tip holder 21 is movable. The arrangement is convenient for setting and processing the locking assembly, and meanwhile, the locking of the contact tip assembly 20 is ensured to be stable and reliable.

Optionally, in this embodiment, the outer circumferential surface of the locking ring 111 is a conical surface, and the side wall of the locking ring 111 on the side where the locking end 1112 is located has a plurality of slots extending along the axial direction, and the plurality of slots are distributed along the circumferential direction of the locking ring 111. This arrangement facilitates the adjustment of the radial dimension of the locking end 1112 and ensures the structural strength and reliability of the locking ring 111. Wherein the radial dimension of the outer circumferential conical surface of the locking ring 111 gradually decreases in the direction of the welding gun pipe segment 11 towards the protection sleeve 12.

As shown in fig. 2 and 3, the protection sleeve 12 is movably sleeved at one end of the welding gun pipe section 11, the protection sleeve 12 comprises a sleeved section 121, a locking matching section 122 and a protection section 123 which are sequentially connected, the radial dimension of the sleeved section 121 is larger than that of the protection section 123, the radial dimension of the locking matching section 122 gradually decreases in the direction of the sleeved section 121 towards the protection section 123, the sleeved section 121 and the welding gun pipe section 11 are sleeved and matched, the cooling pipe section 32 is positioned in the protection section 123, and the locking matching section 122 and the locking assembly are detachably abutted to control the locking assembly to lock or release the conductive nozzle assembly 20.

In this embodiment, the radial dimension of the locking end 1112 can be adjusted by moving the protective sleeve 12, so as to lock or unlock the contact tip assembly 20, and no additional auxiliary assembly is required, which is convenient for operation and is beneficial to the miniaturization of the gas shielded welding gun. Specifically, the inner peripheral surface of the locking matching section 122 is adapted to the outer peripheral surface of the locking ring 111, the inner peripheral surface of the sleeve section 121 is in limit fit with the outer peripheral surface of the welding gun tube section 11, during the sleeve-setting process of the sleeve section 121, the locking matching section 122 moves towards the direction close to the locking ring 111 and is abutted to the locking ring 111, the radial dimension of the locking end 1112 of the locking ring 111 is gradually reduced along with the movement of the locking matching section 122 until the locking end 1112 locks the contact tip assembly 20, and the locking of the contact tip assembly 20 is achieved while the installation of the protection sleeve 12 is completed. Conversely, during the process of disassembling the sleeve joint section 121, the locking mating section 122 moves away from the locking ring 111 and gradually separates from the locking ring 111, and the radial dimension of the locking end 1112 of the locking ring 111 gradually increases along with the movement of the locking mating section 122 until the locking end 1112 releases the clamping of the contact tip assembly 20, so that the contact tip assembly 20 is movable, and an operator can conveniently adjust the extension and retraction of the contact tip assembly 20 according to the actual welding working condition. The contact tip assembly 20 can be tightly placed by disassembling and assembling the protective sleeve 12, the structure is simple, the control is reliable, and the applicability of the gas protection welding gun is improved.

Specifically, the welding gun pipe segment 11 has an external thread, the protection sleeve 12 has an internal thread, and the protection sleeve 12 is screwed with the welding gun pipe segment 11. The arrangement is convenient for dismounting the protective sleeve 12, and meanwhile, the threaded connection can limit the free movement of the protective sleeve 12, so that the condition that the protective sleeve 12 is easy to fall off from the welding gun pipe section 11 to cause failure of a locking assembly and even failure of a gas protection welding gun is avoided, and the reliability of the gas protection welding gun is ensured. Wherein the external thread of the welding gun pipe section 11 is positioned at the periphery of one end of the welding gun pipe section facing the protection sleeve 12, and the internal thread of the protection sleeve 12 is positioned in the sleeving section 121.

Further, the welding gun segment 11 includes a rotation adjusting assembly 114, a fixed segment 112 and a nozzle segment 113, one ends of the protective sleeve 12 and the nozzle segment 113 facing away from the fixed segment 112 are connected, the contact tip assembly 20 is arranged in the nozzle segment 113 in a penetrating manner, the fixed segment 112 and the nozzle segment 113 are connected through the rotation adjusting assembly 114, and the rotation adjusting assembly 114 is used for adjusting an angle between the fixed segment 112 and the nozzle segment 113. The arrangement is that the nozzle section 113 is adjusted in a rotating manner relative to the fixed section 112 through the rotating adjusting assembly 114, so that an operator can adjust the welding angle of the gas shielded welding gun according to actual conditions, and the applicability of the gas shielded welding gun is improved.

As shown in fig. 2 and 3, the rotation adjusting assembly 114 includes a ball member 1141 and a positioning member 1142, one end of the fixed section 112 has a ball groove, the ball member 1141 is disposed at one end of the nozzle section 113 and rotatably disposed in the ball groove, or one end of the nozzle section 113 has a ball groove, the ball member 1141 is disposed at one end of the fixed section 112 and rotatably disposed in the ball groove; the fixing section 112 has a positioning hole communicated with the spherical groove, and the positioning member 1142 is movably inserted into the positioning hole and abuts against the ball member 1141 to define the position of the ball member 1141 in the spherical groove.

In this embodiment, the fixed segment 112 and the nozzle segment 113 are rotationally coupled by the engagement of the ball member 1141 with the ball slot, and the rotational restriction of the ball member 1141 is achieved by the movable positioning member. Specifically, the positioning member is a positioning bolt, the positioning hole is a bolt hole, the positioning bolt is in threaded connection with the bolt hole, when the positioning bolt is penetrated in the bolt hole and is abutted against the ball head member 1141, the ball head member 1141 cannot rotate due to extrusion trend, and when the ball head member 1141 needs to be rotated, the positioning bolt is only required to be rotated out of a part so that the extrusion limiting effect of the positioning bolt on the ball head member 1141 is eliminated, namely, the positioning bolt and the ball head member 1141 are separated, and the ball head member 1141 can rotate in the spherical groove. The welding angle is convenient for the operation of operators, is adjusted according to actual conditions, and is easy to process. Specifically, the positioning members 1142 and the positioning holes are at least two groups to ensure the limiting effect on the ball head member 1141, and the welding angle in this embodiment is adjustable to 45 ° at maximum, that is, the angle between the axis of the fixed section 112 and the axis of the nozzle section 113 is 45 ° at maximum.

Optionally, the nozzle segment 113 includes a adaptor segment 1131, a bakelite segment 1132, and two brass rings 1133, the bakelite segment 1132 is sleeved with the adaptor segment 1131 and welded by the brass rings 1133, the protection sleeve 12 is sleeved with the bakelite segment 1132 and welded by another brass ring 1133, and the rotation adjusting assembly 114 is disposed at one end of the adaptor segment 1131 facing away from the bakelite segment 1132. In this way, the nozzle segment 113 is welded and connected through the brass ring 1133 after being separately processed, so as to ensure the processing precision and stability of the welding gun pipe segment 11. Wherein, a brass ring 1133 for connecting the protection sleeve 12 and the bakelite section 1132 is sleeved on the periphery of one end of the bakelite section 1132 deviating from the adapting section 1131, optionally, one end of the bakelite section 1132 deviating from the adapting section 1131 is flush with the end of the brass ring 1133 sleeved on the periphery of the bakelite section 1132, the end of the locking ring 111 is connected with two flush ends, and the outer radial direction of the locking ring 111 is gradually reduced in the direction of the bakelite section 1132 deviating from the adapting section 1131.

As shown in fig. 1 to 3, the gas shielded welding gun further includes a wire feeding mechanism 40, the wire feeding mechanism 40 includes a roller assembly 41, a gap adjusting assembly 42 and a fixing assembly 43, the side wall of the welding gun pipe section 11 has a mounting groove, the fixing assembly 43 is disposed on the mounting groove, the roller assembly 41 is located in the cavity of the welding gun pipe section 11 and is disposed on the fixing assembly 43 and/or the gap adjusting assembly 42, the roller assembly 41 has a wire feeding gap for passing welding wire, and the gap adjusting assembly 42 is disposed on the fixing assembly 43 and can adjust the size of the wire feeding gap.

In this embodiment, the roller assembly 41 and the gap adjusting assembly 42 are installed through the fixing assembly 43, the correction and guiding of the welding wire in the welding gun pipe section 11 are achieved through the wire feeding gap of the roller assembly 41, the situation that the welding wire is easy to be misplaced and deviate in the process of being conveyed to the conductive nozzle assembly 20 due to the overlong welding gun pipe section 11 is avoided, and the reliability and stability of conveying the welding wire are ensured. Further, the size of the wire feeding gap is adjusted through the gap adjusting assembly 42 so as to be suitable for welding wires of different types and sizes, and the applicability of the gas shielded welding gun is improved.

Specifically, the gas shielded welding gun further comprises a wire feeder for feeding welding wires into the welding gun pipe section 11, and the welding wires entering the welding gun pipe section 11 are fed to the position of the conductive nozzle assembly 20 through correction guiding of the wire feeding mechanism 40 due to the fact that the wire feeding position of the wire feeder is far (5-10 m) from the conductive nozzle assembly 20, so that the welding wires are fed. The gas shielded welding gun provided by the embodiment is suitable for solid welding wires and flux-cored wires with the thickness of 1.2mm-1.6mm, and is not suitable for stranded welding wires.

Further, the roller assembly 41 includes a first roller group 411 and a second roller group 412 extending along the radial direction of the welding gun pipe section 11, the first roller group 411 and the second roller group 412 form a wire feeding gap along the radial gap of the welding gun pipe section 11, the second roller group 412 is rotatably disposed on the fixing assembly 43, the gap adjusting assembly 42 includes a roller seat 421 and an adjusting screw 422, the first roller group 411 is disposed on the roller seat 421, and the adjusting screw 422 passes through the fixing assembly 43 and is in threaded connection with the fixing assembly 43 so as to adjust the distance between the first roller group 411 and the second roller group 412. The arrangement is that the first roller group 411 can be moved through the threaded connection of the adjusting screw 422 and the fixing component 43, and then the size of a wire feeding gap formed by the first roller group 411 and the second roller group 412 is adjusted, so that the wire feeding device is simple in structure and reliable in adjustment.

Alternatively, as shown in fig. 1 to 3, the fixing assembly includes a first fixing member 431, a second fixing member 432, and a spacer 433, the first fixing member 431 is disposed in the mounting groove, the spacer 433 is disposed between the bottom wall of the mounting groove and the first fixing member 431, the second roller set 412 is rotatably disposed on the first fixing member 431, the second fixing member 432 is disposed on the first fixing member 431, the second fixing member 432 has a threaded hole thereon, and the adjusting screw 422 is threadedly coupled to the threaded hole. In this embodiment, the first fixing member 431 and the second fixing member 432 are integrally disposed and perpendicular to each other, so that the second roller set 412 and the adjusting screw 422 are conveniently disposed and the first roller set 411 is conveniently adjusted, and the reliability of connection between the wire feeding mechanism and the welding gun tube 11 and the reliability and applicability of correction and guiding of the welding wire by the wire feeding mechanism 40 are ensured.

As shown in fig. 1 and 3, the wire feeding mechanism 40 further includes a driving assembly 44, and the driving assembly 44 is disposed on the fixing assembly 43 and is in driving connection with the roller assembly 41 to drive the roller assembly 41 to rotate and feed the welding wire in the wire feeding gap. In this embodiment, the driving assembly 44 includes a bracket 441 and a driving motor 442, the bracket 441 is disposed on a side of the fixing assembly 43 facing away from the welding gun tube segment 11, the driving motor 442 is disposed in the bracket 441, and an output shaft of the driving motor 442 passes through the fixing assembly 43 and is in driving connection with the roller assembly 41 to drive the roller assembly 41 to rotate and convey welding wires in the wire feeding gap. By means of the arrangement, rotation driving of the second roller set 412 is achieved through the driving motor 442, transmission of welding wires passing through the wire feeding gap is achieved, and wire feeding effect is guaranteed.

Alternatively, as shown in fig. 2, the first roller group 411 includes at least one wire feeding roller, the second roller group 412 includes at least two wire feeding rollers, the wire feeding rollers of the first roller group 411 and the wire feeding rollers of the second roller group 412 are alternately arranged along the axial direction of the welding gun pipe section 11, and the outer circumference of the wire feeding rollers has an annular guiding groove for guiding the welding wire.

In this embodiment, the first roller set 411 includes one wire feeding roller, the second roller set 412 includes two wire feeding rollers, the plurality of wire feeding rollers are located on the same vertical plane, and the two wire feeding rollers of the second roller set 412 are located on the same horizontal plane. The device is arranged in such a way, so that straightening and guiding of welding wires passing through the wire feeding gap are realized, and an auxiliary wire feeding effect is ensured. Further, the outer peripheral surfaces of the three wire feeding rollers are provided with annular guide grooves so as to limit and guide welding wires in the wire feeding gaps, so that deviation or movement of the welding wires along the axial direction of the wire feeding rollers in the moving process is avoided, and the reliability of auxiliary wire feeding is ensured. The output shaft of the driving motor 442 in this embodiment is drivingly connected to one wire feeding roller of the second roller set 412, so as to implement transmission of the welding wire passing through the wire feeding gap.

Alternatively, as shown in fig. 3, the air supply pipe section 31 includes a first pipe section 311 and a second pipe section 312 connected to each other, a side of the second pipe section 312 facing away from the first pipe section 311 communicates with the cooling pipe section 32, an axis of the second pipe section 312 coincides with an axis of the welding gun pipe section 11, and an axis of the first pipe section 311 is spaced from an axis of the welding gun pipe section 11 to avoid the wire feeding mechanism 40. The arrangement prevents the wire feeding or the air feeding from being affected by the mutual interference of the installation positions of the air feeding pipe section 31 and the wire feeding mechanism 40 in the welding gun pipe section 11, and ensures the reliability of the gas shielded welding gun.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A gas shielded welding gun, comprising:

a welding gun main body (10), wherein the welding gun main body (10) comprises a welding gun pipe section (11) and a protective sleeve (12) which are connected with each other;

a contact tip assembly (20), a portion of the contact tip assembly (20) being disposed through the welding gun tube segment (11), another portion of the contact tip assembly (20) being disposed through the protective sleeve (12), the contact tip assembly (20) being movably disposed to extend out of the protective sleeve (12) or retract into the protective sleeve (12);

the welding gun comprises an air supply pipe (30) for conveying welding protective gas, wherein the air supply pipe (30) comprises an air supply pipe section (31) and a cooling pipe section (32) which are communicated with each other, the air supply pipe section (31) is arranged in the welding gun pipe section (11) and the contact tip assembly (20) in a penetrating mode, the cooling pipe section (32) is located between the contact tip assembly (20) and the protective sleeve (12) and is arranged on the outer wall of the contact tip assembly (20), and the outlet of the cooling pipe section (32) is communicated with the cavity of the protective sleeve (12).

2. The gas shielded welding gun according to claim 1, wherein the contact tip assembly (20) includes a contact tip holder (21) and a welding contact tip (22), the welding contact tip (22) is provided to pass through one end of the contact tip holder (21), the cooling tube section (32) is a coil tube section and is wound around the outer periphery of the contact tip holder (21), and one end of the welding gun tube section (11) facing the protective sleeve (12) has a locking assembly for restricting movement of the contact tip holder (21) to lock or unlock the contact tip assembly (20).

3. A gas shielded welding gun according to claim 2, wherein the locking assembly includes a locking ring (111), the locking ring (111) is sleeved on the contact tip seat (21), the locking ring (111) has a locking end (1112), a radial dimension of the locking end (1112) is adjustable to lock or unlock the contact tip assembly (20), and an inner wall of the protection sleeve (12) and an outer circumferential surface of the locking ring (111) are detachably abutted to adjust a radial dimension of the locking end (1112).

4. The gas shielded welding gun according to claim 2, wherein the protection sleeve (12) is movably sleeved at one end of the welding gun pipe section (11), the protection sleeve (12) comprises a sleeved section (121), a locking fit section (122) and a protection section (123) which are sequentially connected, the radial dimension of the sleeved section (121) is larger than that of the protection section (123), the radial dimension of the locking fit section (122) gradually decreases in the direction of the sleeved section (121) towards the protection section (123), the sleeved section (121) and the welding gun pipe section (11) are in sleeved fit, the cooling pipe section (32) is positioned in the protection section (123), and the locking fit section (122) and the locking assembly are detachably abutted to control the locking assembly to lock or unlock the conductive nozzle assembly (20).

5. A gas shielded welding gun according to claim 1, wherein the welding gun pipe section (11) has an external thread, the protection sleeve (12) has an internal thread, and the protection sleeve (12) and the welding gun pipe section (11) are screwed.

6. The gas shielded welding gun of claim 1, wherein the gun segment (11) includes a rotation adjustment assembly (114), a fixed segment (112) and a nozzle segment (113), the protective sleeve (12) and the nozzle segment (113) are connected at an end facing away from the fixed segment (112), the contact tip assembly (20) is disposed through the nozzle segment (113), the fixed segment (112) and the nozzle segment (113) are connected by the rotation adjustment assembly (114), and the rotation adjustment assembly (114) is configured to adjust an angle between the fixed segment (112) and the nozzle segment (113).

7. The gas shielded welding gun of claim 6, wherein the rotation adjustment assembly (114) includes a ball head member (1141) and a positioning member (1142), one end of the fixed section (112) having a spherical groove, the ball head member (1141) being disposed at one end of the nozzle section (113) and rotatably disposed in the spherical groove, or one end of the nozzle section (113) having a spherical groove, the ball head member (1141) being disposed at one end of the fixed section (112) and rotatably disposed in the spherical groove; the fixing section (112) is provided with a positioning hole communicated with the spherical groove, and the positioning piece (1142) is movably arranged in the positioning hole in a penetrating mode and is abutted with the ball head piece (1141) so as to limit the position of the ball head piece (1141) in the spherical groove.

8. The gas shielded welding gun according to claim 1, further comprising a wire feeding mechanism (40), the wire feeding mechanism (40) comprising a roller assembly (41), a gap adjusting assembly (42) and a fixing assembly (43), the side wall of the welding gun pipe section (11) having a mounting groove, the fixing assembly (43) being disposed on the mounting groove, the roller assembly (41) being located in the cavity of the welding gun pipe section (11) and being disposed on the fixing assembly (43) and/or the gap adjusting assembly (42), the roller assembly (41) having a wire feeding gap for passing a welding wire, the gap adjusting assembly (42) being disposed on the fixing assembly (43) and being adjustable in the size of the wire feeding gap.

9. The gas shielded welding gun of claim 8, wherein the roller assembly (41) includes a first roller set (411) and a second roller set (412) extending radially of the welding gun segment (11), the first roller set (411) and the second roller set (412) forming the wire feed gap along a gap radially of the welding gun segment (11), the second roller set (412) rotatably disposed on the stationary assembly (43), the gap adjustment assembly (42) including a roller set (421) and an adjustment screw (422), the first roller set (411) disposed on the roller set (421), the adjustment screw (422) passing through the stationary assembly (43) and threadably coupled to the stationary assembly (43) to adjust a distance of the first roller set (411) relative to the second roller set (412).

10. The gas shielded welding gun of claim 8, wherein the wire feed mechanism (40) further comprises a drive assembly (44), the drive assembly (44) being disposed on the stationary assembly (43) and in driving connection with the roller assembly (41) to drive the roller assembly (41) to rotate and feed the welding wire within the wire feed gap.