A welding gun neck seat and gun cable seat cooperation structure

Abstract

The utility model relates to welding torch technical field, concretely relates to a welding torch neck seat and gun cable seat cooperation structure, including gun neck seat, including a plurality of first limiting portions interval setting along the circumferential direction, and the one end surface of gun neck seat is equipped with first water inlet channel, first backwater channel, first wire feeding channel, first gas feeding channel, gun cable seat, including a plurality of second limiting portions interval setting along the circumferential direction, and the one end surface of gun cable seat is equipped with second water inlet channel, second backwater channel, second wire feeding channel, second gas feeding channel, sealing pad is equipped with water inlet hole, backwater hole, wire feeding hole, gas feeding hole, and sealing pad is located between gun neck seat and gun cable seat. The steps of separately processing several small cylinders and welding with the base body are saved, the structure is simplified, and the reliability is improved; the aperture of the channel can be larger, the cooling effect can be improved, and the risk of blockage can be reduced; the overall flat compression type sealing pad can reduce the processing difficulty and improve the sealing property.

Description

Technical Field

[0001] This utility model relates to the field of welding torch technology, specifically to a welding torch neck seat and torch cable seat cooperation structure. Background Technology

[0002] Gas metal arc welding (GMAW) torches can be classified into two types based on their cooling method: air-cooled and water-cooled. Water-cooled torches have additional water circulation cooling pipes compared to air-cooled torches; the rest of the structure is basically the same. For example... Figure 1 The basic components of the welding torch shown include a torch neck 21, a torch cable 24, and a crash barrier 23. The torch neck 21 and the torch cable 24 are detachable. The end of the torch neck 21 has a torch neck seat 11, and the head of the torch cable 24 has a torch cable seat 12. The torch neck seat 11 has a step, and the head of the torch cable seat 12 has external threads. The torch neck seat 11 and the torch cable seat 12 are pressed together by a lock nut 22. The connection between the torch neck seat 11 and the torch cable seat 12 must at least meet the following requirements: electrical conductivity, air supply, and cooling water inflow and outflow. The connection between the torch neck seat 11 and the torch cable seat 12 must be stable and must not have relative torsion under external force.

[0003] like Figure 2 As shown, several cylinders are welded to the end face of the gun neck seat 11. Each cylinder has a through hole and a sealing groove on its outer side, and an O-ring 19 is fitted onto it. One end of the cable holder 12 has channels corresponding to the cylinders, used for the inflow and outflow of cooling water and the inflow of protective gas, respectively defined as the water inlet channel 13, water return channel 16, wire feed channel 14, and air supply channel 15. The outer diameter of the O-ring 19 is interference-fitted with the corresponding channel on the cable holder 12 to ensure the sealing of the water and air passages. The cylinders on the gun neck seat 11 designed as wire feed hose channels have relatively large diameters; to increase torsional strength, one or two pins 17 and pin holes 18 are generally provided, located on the gun neck seat 11 and cable holder 12, respectively.

[0004] The above structure has the following defects in actual use: (1) Due to the limitation of the welding torch's external dimensions, the cylinder on the torch neck seat cannot be made too large, usually with an outer diameter of 6-7mm. At the same time, an O-ring groove must be machined, and its inner diameter can only be made too small, usually 3-3.5mm. As a result, the cylinder has low strength. During use, the lock nut may loosen accidentally or during installation, which may cause the cylinder to deform or even break and become scrap. The smaller inner hole also limits the flow of cooling water and shielding gas, causing the torch body to overheat or the weld to have a vent hole. During long-term use of the welding torch, the smaller inner hole may also become blocked due to the accumulation of impurities or copper rust in the cooling water, causing the cooling water to stop flowing and burning out the welding torch. (2) The positional accuracy requirements between the multiple cylinders on the torch neck seat and the corresponding holes on the torch cable seat are extremely high, which increases the processing difficulty and processing cost. (3) The cylinder and the torch neck seat need to be processed separately and then assembled and brazed together. The processing, assembly and welding processes are all very demanding, resulting in high costs. (4) The O-ring on the cylinder and the hole of the cable seat are interference fit. Since the O-ring is extremely small and has very little elastic margin, slight scratches on the O-ring during installation or slight aging of the rubber material during long-term use will cause sealing failure and cooling water leakage. (5) In order to improve the torsional strength between the gun neck seat and the cable seat, it is necessary to add pins and pin hole structures, thereby increasing the complexity of the entire structure and processing cost. Utility Model Content

[0005] The purpose of this invention is to provide a welding torch neck seat and torch cable seat mating structure to solve the problems of small hole size mentioned above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The welding torch neck seat and torch cable seat mating structure includes a torch neck seat, which includes a plurality of first limiting parts spaced apart along the circumferential direction. One end face of the torch neck seat is provided with a first water inlet channel, a first water return channel, a first wire feeding channel and a first air supply channel. The gun cable holder includes a number of second limiting parts spaced apart along the circumference. One end face of the gun cable holder is provided with a second water inlet channel, a second water return channel, a second wire feeding channel, and a second air supply channel. The second limiting parts are inserted into and cooperate with the first limiting parts to achieve the anti-rotation cooperation between the gun neck seat and the gun cable holder. The sealing gasket is equipped with a water inlet hole, a water return hole, a wire feed hole, and an air supply hole. The sealing gasket is located between the gun neck seat and the gun cable seat.

[0007] Furthermore, the sealing gasket has an annular protrusion on the outer edge of the water inlet, water return, wire feed, and air supply holes to form a sealing part that seals against one end face of the gun neck seat or one end face of the gun cable seat.

[0008] Furthermore, the sealing gasket has a cylindrical protrusion at at least one of the water inlet, water outlet, and air supply holes for insertion into the corresponding channel of the gun neck seat or gun cable seat.

[0009] Furthermore, the sealing gasket is provided with cylindrical protrusions at the water inlet, water return, and air supply holes, respectively for insertion into the second water inlet channel, second water return channel, and second air supply channel of the gun cable holder.

[0010] Furthermore, one end face of the gun neck seat or one end face of the gun cable seat is a planar structure.

[0011] Furthermore, the first limiting part is an external tooth, and the second limiting part is an internal tooth.

[0012] Furthermore, one of the outer teeth and one of the inner teeth are mutually cooperating anti-fooling teeth.

[0013] Furthermore, the first limiting part is a convex strip, and the second limiting part is a groove.

[0014] Furthermore, each of the first limiting portions of the gun neck seat is provided on the cylindrical plug end, the gun neck seat is provided with a shoulder for axial limiting, one end face of the gun cable seat is concave, and the gun cable seat also has an outer end face that mates with the shoulder.

[0015] Furthermore, one end face of the gun cable holder is formed by the bottom surface of a concave circular groove, and each of the second limiting portions is arranged on the inner sidewall of the circular groove.

[0016] The beneficial effects of this utility model are: (1) The design of small cylinders and O-rings in the existing technology has been abandoned. The entire structure has no small and easily damaged parts, which improves the reliability of the parts. It also eliminates the step of separate processing and welding to the base, which simplifies the structure and manufacturing process.

[0017] (2) Without changing the overall dimensions of the gun neck seat and gun cable seat joint, the diameter of the channel can be at least the outer diameter of the original cylinder, which can increase the area of ​​the water and air channels, improve the cooling effect, and reduce the risk of the channel being blocked by impurities and copper rust.

[0018] (3) A single rubber pad replaces multiple small O-rings in the prior art. Corresponding wire feeding holes, air supply holes, water inlet holes, and water return holes are designed on the rubber pad. The edges of the holes are provided with protrusions to increase the sealing performance. Since the size and elasticity of the rubber pad can be made larger, and the sealing structure has changed from the original hole and shaft fit to a plane pressing fit, it not only reduces the processing difficulty, but also greatly improves the reliability of use and the life of the seal.

[0019] (4) The tooth shape design of the inner and outer teeth can be made into a foolproof structure, and some of the teeth are designed to be different from the tooth shape of other teeth. There is only one direction that can be inserted between the gun neck seat and the gun cable seat, ensuring the consistency of the installation direction each time.

[0020] (5) The internal and external teeth can be completed by gear cutting or die extrusion, which results in low cost and high efficiency in mass production.

[0021] (6) The gun neck seat and the gun cable seat are connected by the meshing of the internal and external teeth to achieve the anti-torsion function. The more teeth there are, the larger the meshing area is, and the higher the anti-torsion strength is. Attached Figure Description Figure 1 This is a schematic diagram of the basic structure of a welding torch in the prior art; Figure 2 This is an exploded schematic diagram of the gun neck mount and the gun cable mount that mates with it in the prior art; Figure 3 This is an exploded view of the welding torch neck seat and torch cable seat mating structure of this utility model; Figure 4 This is a structural diagram of the sealing gasket; Figure 5 This is a cross-sectional schematic diagram of the gun neck seat in other embodiments.

[0022] 11. Gun neck seat; 12. Gun cable seat; 13. Water inlet channel; 14. Wire feed channel; 15. Air supply channel; 16. Water return channel; 17. Pin; 18. Pin hole; 19. O-ring; 21. Gun neck; 22. Lock nut; 23. Collision protector; 24. Gun cable; 3. Gun neck seat; 31. First limiting part; 32. First end face; 33. First wire feed channel; 34. First water inlet channel; 35. First air supply channel; 36. First water return channel; 37. Shoulder; 4. Sealing gasket; 41. Water inlet hole; 42. Air supply hole; 43. Water return hole; 44. Insertion protrusion; 45. Wire feed hole; 46. Annular protrusion; 5. Gun cable seat; 51. Second limiting part; 52. Second end face; 53. Second water inlet channel; 54. Second air supply channel; 55. Second water return channel; 56. Second wire feed channel; 57. Anti-fooling tooth; 58. Outer end face. Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] Embodiments of this utility model: like Figures 3-4 As shown, the welding torch neck seat and torch cable seat mating structure includes a torch neck seat 3, a torch cable seat 5, and a sealing gasket 4 installed between the two. The sealing gasket 4 achieves the sealing of the corresponding water and air passages at the joint.

[0024] The gun neck seat 3 includes a plurality of first limiting parts 31 spaced apart along the circumference, and each first limiting part 31 of the gun neck seat 3 is disposed on a cylindrical insertion end. The first limiting part 31 is an external tooth, which can be completed by tooth shaping or die extrusion, resulting in low cost and high efficiency for mass production.

[0025] The gun neck seat 3 has a first water inlet channel 34, a first water return channel 36, a first wire feeding channel 33, and a first air supply channel 35 on one end face. This end face of the gun neck seat 3 is a planar structure, defined as the first end face 32; each channel is designed perpendicular to this end face. This structure is significantly different from the existing technology that brazes several cylinders onto the end face. It eliminates the need for small cylindrical structures, that is, it eliminates the need for separately machining each cylinder (corresponding to the hollow cylindrical structure of the air and water passages) and welding steps, and the structure is simplified, improving reliability.

[0026] The cable holder 5 includes a plurality of second limiting portions 51 spaced apart along the circumferential direction. One end face of the cable holder 5 is provided with a second water inlet channel 53, a second water return channel 55, a second wire feeding channel 56, and a second air supply channel 54. One end face of the cable holder 5 is a planar structure, defined as the second end face 52, and this end face of the cable holder 5 is concave. The bottom surface of the concave circular groove is formed on one end face of the cable holder 5, and each of the second limiting portions 51 is distributed on the inner sidewall, i.e., the inner circumferential surface, of the circular groove. The second limiting portions 51 are internal teeth.

[0027] The second limiting part 51 engages with the first limiting part 31 to achieve an anti-rotation fit between the gun neck seat 3 and the gun cable seat 5, improving the strength after their docking and eliminating the need for an additional pin for axial connection and anti-torsion. Eliminating the pin and pin hole increases the effective usable area of ​​the first end face 32 and the second end face 52, allowing for larger diameter designs for the gas and water channels, improving cooling efficiency and reducing the risk of blockage by impurities and copper rust. The anti-torsion function between the gun neck seat 3 and the gun cable seat 5 is achieved through the meshing of internal and external teeth; the more teeth, the larger the meshing area, and the higher the torsional strength.

[0028] Further optimization involves one external tooth and one internal tooth being a mutually cooperating anti-fooling tooth 57 (one side is marked), whose shape is different from the other external and internal teeth, making it easy to distinguish and thus facilitating the docking of the gun neck seat 3 and the gun cable seat 5.

[0029] The gun neck seat 3 is provided with a shoulder 37 for axial positioning. The gun cable seat 5 also has an outer end face 58 that mates with the shoulder 37. The end of the gun cable seat 5 adjacent to the outer end face 58 is provided with an external thread section for mates with a lock nut to press the gun neck seat 3 and the gun cable seat 5 together. The sealing gasket 4 is pressed together and plays a sealing role.

[0030] The sealing gasket 4 has a water inlet 41, a water return 43, a wire feed hole 45, and an air supply hole 42. The sealing gasket 4 is located between the gun neck seat 3 and the gun cable seat 5. The sealing gasket 4 is made of rubber.

[0031] The sealing gasket 4 has an annular protrusion 46 on the outer edge of the water inlet hole 41, water return hole 43, wire feed hole 45, and air supply hole 42, which is used to form a sealing part that seals with one end face of the gun neck seat 3 or one end face of the gun cable seat 5, thereby improving the sealing performance.

[0032] The sealing gasket 4 has cylindrical protrusions 44 at the water inlet 41, water return 43, and air supply 42, respectively, for insertion into the second water inlet channel 53, the second water return channel 55, and the second air supply channel 54 of the gun cable holder 5. In other embodiments, the sealing gasket 4 may also have cylindrical protrusions 44 at at least one or two of the water inlet 41, water return 43, and air supply 42, which serve a positioning function, facilitate assembly, and prevent the sealing gasket 4 from deviating.

[0033] The first water inlet channel 34, water inlet hole 41, and second water inlet channel 53 are correspondingly arranged to form a water inlet channel; the first return water channel 36, return water hole 43, and second return water channel 55 are correspondingly arranged to form a return water channel; the first air supply channel 35, air supply hole 42, and second air supply channel 54 are correspondingly arranged; the first wire feeding channel 33, wire feeding hole 45, and second wire feeding channel 56 are correspondingly arranged to allow the wire feeding tube to pass through.

[0034] In other embodiments, the shapes of the first limiting part and the second limiting part can be varied. The first limiting part is a convex strip, and the second limiting part is a groove. The convex strip can be a rectangular strip, a trapezoidal strip, a triangle, an arc, etc., and the structure of the groove can be adapted to it.

[0035] Figure 3 The gun neck seat shown has a large number of external teeth; in other embodiments, such as... Figure 5 As shown, the number of first limiting parts can also be reduced. The first limiting parts adopts an outwardly convex arc segment with intervals, one of which is smaller as a foolproof design. The gun cable seat is provided with a matching second limiting part, and the two are inserted into each other.

[0036] The welding torch neck seat and cable seat of this utility model have the following technical advantages: (1) The design of small cylinders and O-rings in the existing technology has been abandoned. The entire structure has no small and easily damaged parts, which improves the reliability of the parts. It also eliminates the step of separate processing and welding to the base, which simplifies the structure and manufacturing process.

[0037] (2) Without changing the overall dimensions of the gun neck seat and gun cable seat joint, the aperture of the channel can be at least the outer diameter of the original cylindrical structure, thereby increasing the area of ​​the water channel and air channel, improving the cooling effect, and reducing the risk of the channel being blocked by impurities and copper rust.

[0038] (3) A single rubber pad replaces multiple small O-rings in the prior art. Corresponding wire feeding holes, air supply holes, water inlet holes, and water return holes are designed on the rubber pad. The edges of the holes are provided with protrusions to increase the sealing performance. Since the size and elasticity of the rubber pad can be made larger, and the sealing structure has changed from the original hole and shaft fit to a plane pressing fit, the processing difficulty has been reduced, and the reliability and life of the seal have been greatly improved.

[0039] (4) The tooth shape design of the inner and outer teeth can be made into a foolproof structure, and some of the teeth are designed to be different from the tooth shape of other teeth. There is only one direction that can be inserted between the gun neck seat and the gun cable seat, ensuring the consistency of the installation direction each time.

[0040] (5) The internal and external teeth can be completed by gear cutting or die extrusion, which results in low cost and high efficiency in mass production.

[0041] (6) The gun neck seat and the gun cable seat are connected by the meshing of the internal and external teeth to achieve the anti-torsion function. The more teeth there are, the larger the meshing area is, and the higher the anti-torsion strength is.

Claims

1. A welding torch neck seat and torch cable seat mating structure, characterized in that: It includes a gun neck seat, including a plurality of first limiting parts spaced apart along the circumference, and one end face of the gun neck seat is provided with a first water inlet channel, a first water return channel, a first wire feeding channel and a first air supply channel; The gun cable holder includes a number of second limiting parts spaced apart along the circumference. One end face of the gun cable holder is provided with a second water inlet channel, a second water return channel, a second wire feeding channel, and a second air supply channel. The second limiting parts are inserted into and cooperate with the first limiting parts to achieve the anti-rotation cooperation between the gun neck seat and the gun cable holder. The sealing gasket is equipped with a water inlet hole, a water return hole, a wire feed hole, and an air supply hole. The sealing gasket is located between the gun neck seat and the gun cable seat.

2. The welding torch neck seat and torch cable seat mating structure according to claim 1, characterized in that: The sealing gasket has an annular protrusion on the outer edge of the water inlet, water return, wire feed, and air supply holes to form a sealing part that seals against one end face of the gun neck seat or one end face of the gun cable seat.

3. The welding torch neck seat and torch cable seat mating structure according to claim 2, characterized in that: The sealing gasket has a cylindrical protrusion at at least one of the water inlet, water outlet, and air supply holes, for insertion into the corresponding channel of the gun neck seat or gun cable seat.

4. The welding torch neck seat and torch cable seat mating structure according to claim 3, characterized in that: The sealing gasket has cylindrical protrusions at the water inlet, water return, and air supply holes, which are respectively used to insert into the second water inlet channel, the second water return channel, and the second air supply channel of the gun cable holder.

5. The welding torch neck seat and torch cable seat mating structure according to claim 1, characterized in that: One end face of the gun neck seat or one end face of the gun cable seat is a planar structure.

6. The welding torch neck seat and torch cable seat mating structure according to claim 1, characterized in that: The first limiting part is an external tooth, and the second limiting part is an internal tooth.

7. The welding torch neck seat and torch cable seat mating structure according to claim 6, characterized in that: One of the outer teeth and one of the inner teeth are interlocking anti-fooling teeth.

8. The welding torch neck seat and torch cable seat mating structure according to claim 1, characterized in that: The first limiting part is a convex strip, and the second limiting part is a groove.

9. The welding torch neck seat and torch cable seat mating structure according to claim 1, characterized in that: Each of the first limiting portions of the gun neck seat is provided on the cylindrical plug end. The gun neck seat is provided with a shoulder for axial limiting. One end face of the gun cable seat is concave. The gun cable seat also has an outer end face that mates with the shoulder.

10. The welding torch neck seat and torch cable seat mating structure according to claim 9, characterized in that: One end face of the gun cable holder is formed by the bottom surface of a concave circular groove, and each of the second limiting portions is arranged on the inner sidewall of the circular groove.

Images