Matching structure of gun neck seat and gun cable seat of welding gun

Abstract

The invention relates to the technical field of welding guns, in particular to a welding gun neck seat and gun cable seat matching structure which comprises a gun neck seat and a plurality of first limiting parts arranged at intervals in the circumferential direction, 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 gas feeding channel; the gun cable seat comprises a plurality of second limiting parts which are arranged at intervals in the circumferential direction, and one end face of the gun cable seat is provided with a second water inlet channel, a second water return channel, a second wire feeding channel and a second air feeding channel; the sealing gasket is provided with a water inlet hole, a water return hole, a wire feeding hole and an air feeding hole, and the sealing gasket is located between the gun neck seat and the gun cable seat. The steps of independently machining a plurality of small cylinders and then welding the small cylinders with the base body are omitted, the structure is simplified, and the reliability is improved; the aperture of the channel can be increased, the cooling effect can be improved, and the blocking risk is reduced; the whole flat pressing type sealing gasket can reduce the machining difficulty and improve the sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding gun, in particular to a welding gun neck seat and cable seat cooperation structure. BACKGROUND

[0002] The welding gun of shielded metal arc welding can be divided into two types of air-cooled welding gun and water-cooled welding gun according to the cooling mode of cold robot welding gun. The water-cooled welding gun has a water circulation cooling water pipe in addition to the water-cooled welding gun, and the rest of the structure is basically the same. Figure 1 As shown in the basic structure of the welding gun: including gun neck 21, cable 24, anti-collision device 23, gun neck 21 and cable 24 are detachable, the tail end of gun neck 21 has gun neck seat 11, the head of cable 24 has cable seat 12, gun neck seat 11 has a step, the head of cable seat 12 has external threads, and gun neck seat 11 and cable seat 12 are pressed together by lock nut 22. The connection between the gun neck seat 11 and the cable seat 12 at least needs to meet: electric conduction, gas supply, cooling water inflow and outflow, stable connection between the gun neck seat 11 and the cable seat 12, and no relative twist under external force.

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

[0004] The above structure has the following defects in actual use: (1) Due to the limitation of the size of the welding gun, the cylinder on the gun neck seat cannot be made larger, and the outer diameter is usually 6-7 mm. At the same time, the O-ring groove needs to be machined, and the inner hole diameter can only be made smaller, usually 3-3.5 mm. Therefore, the strength of the cylinder is low, and the accidental loosening of the lock nut during use or the careless installation may cause deformation or even breakage of the cylinder. The smaller inner hole also limits the flow of cooling water and protective gas, causing overheating of the gun body or air hole defects in the weld. In addition, the smaller inner hole may be blocked due to the accumulation of impurities or copper rust in the cooling water, causing the cooling water to stop flowing and the welding gun to burn out. (2) The position precision between the multiple cylinders on the gun neck seat and the corresponding hole channels on the gun cable seat is extremely high, which increases the processing difficulty and cost. (3) The cylinder and the gun neck seat need to be machined separately and then assembled and brazed together, which requires high processing, assembly and welding technology, resulting in high cost. (4) The O-ring on the cylinder is in interference fit with the hole channel of the gun cable seat. Due to the small size of the O-ring, the elastic allowance is small. During installation, slight scratches on the O-ring or slight aging of the rubber material during long-term use may cause sealing failure and cooling water leakage accidents. (5) In order to improve the torsional strength between the gun neck seat and the gun cable seat, a pin and pin hole structure needs to be added, which increases the complexity of the entire structure and the processing cost. SUMMARY

[0005] The purpose of the present application is to provide a welding gun neck seat and cable seat cooperation structure to solve the above-mentioned problems of small hole size and the like.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: The welding gun neck seat and cable seat cooperation structure comprises a gun neck seat, a plurality of first limiting parts are arranged along the circumferential direction, and a first water inlet channel, a first water return channel, a first wire feeding channel and a first gas feeding channel are arranged on one end face of the gun neck seat. The gun cable seat comprises a plurality of second limiting parts arranged along the circumferential direction, and a second water inlet channel, a second water return channel, a second wire feeding channel and a second gas feeding channel are arranged on one end face of the gun cable seat. The second limiting part and the first limiting part are inserted and connected to realize the rotation-stopping cooperation of the gun neck seat and the gun cable seat. The sealing gasket is provided with a water inlet hole, a water return hole, a wire feeding hole and a gas feeding hole, and the sealing gasket is located between the gun neck seat and the gun cable seat.

[0007] Further, the sealing gasket is provided with an annular protrusion on the outer edge of the water inlet hole, the water return hole, the wire feeding hole and the gas feeding hole, which is used to form a sealing part with one end face of the gun neck seat or one end face of the gun cable seat.

[0008] Further, the sealing gasket is provided with a cylindrical protrusion at at least one of the water inlet hole, the water return hole and the air supply hole, which is used for inserting into the corresponding channel of the gun neck seat or the gun cable seat.

[0009] Further, the sealing gasket is provided with a cylindrical protrusion at at least one of the water inlet hole, the water return hole and the air supply hole, which is used for inserting into the corresponding channel of the gun neck seat or the gun cable seat.

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

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

[0012] Further, one of the external tooth and the internal tooth is a foolproof tooth matched with the other.

[0013] Further, the first limiting part is a protrusion, and the second limiting part is a groove.

[0014] Further, the first limiting part of the gun neck seat is arranged on a cylindrical plug end, the gun neck seat is provided with an axial limiting shoulder, and one end surface of the gun cable seat is concave, and the gun cable seat further has an outer end surface matched with the shoulder.

[0015] Further, one end surface of the gun cable seat is a bottom surface of a concave circular groove, and the second limiting parts are arranged on the inner side wall of the circular groove.

[0016] The present application has the following beneficial effects: (1) The present application discards the small cylinder and O-ring scheme in the prior art, and the entire structure does not have small and fragile components, thereby improving the reliability of the components; and the step of separately processing and then welding with the base body is omitted, thereby simplifying the structure and manufacturing process.

[0017] (2) In the case where the overall outer dimension of the joint of the gun neck seat and the gun cable seat is unchanged, the hole diameter of the channel can be at least the original designed outer diameter of the cylinder, the area of the water and air channels can be increased, the cooling effect can be improved, and the risk of blockage of the channel by impurities and copper rust can be reduced.

[0018] (3) The present application uses a whole rubber gasket to replace the multiple small O-rings in the prior art, and the rubber gasket is provided with corresponding wire feeding holes, air supply holes, water inlet holes and water return holes, and the edges of the holes are provided with protrusions to increase the sealing performance. Since the size and elastic allowance of the rubber gasket can be made larger, and the sealing structure is changed from the original hole and shaft cooperation to planar compression cooperation, the processing difficulty is reduced, and the use reliability and service life of the sealing element are greatly improved.

[0019] (4) The tooth shape design of the inner tooth and the outer tooth can be designed as a foolproof structure, part of the teeth is designed to be different from the tooth shape of other teeth, and there is only one direction between the gun neck seat and the gun cable seat for insertion, thereby ensuring the consistency of the installation direction each time.

[0020] (5) The inner tooth and the outer tooth can be completed by gear shaping or die extrusion, and the batch production cost is low and the efficiency is high.

[0021] (6) The anti-torsion function is realized by the meshing between the inner tooth and the outer tooth between the gun neck seat and the gun cable seat, the more the number of teeth is, the larger the meshing area is, and the higher the anti-torsion strength is. BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is a schematic diagram of the basic structure of the welding gun in the prior art; Figure 2 It is an exploded schematic diagram of the gun neck seat and the gun cable seat cooperating with each other in the prior art; Figure 3 It is an exploded schematic diagram of the gun neck seat and the gun cable seat cooperating with each other in the prior art; Figure 4 It is a structure diagram of the sealing gasket; Figure 5 It is a sectional view of the gun neck seat in other embodiments.

[0022] 11, gun neck seat; 12, gun cable seat; 13, water inlet channel; 14, wire feeding channel; 15, gas feeding channel; 16, water return channel; 17, pin; 18, pin hole; 19, O-ring; 21, gun neck; 22, lock nut; 23, anti-collision device; 24, gun cable; 3, gun neck seat; 31, first limiting part; 32, first end face; 33, first wire feeding channel; 34, first water inlet channel; 35, first gas feeding channel; 36, first water return channel; 37, shaft shoulder; 4, sealing gasket; 41, water inlet hole; 42, gas feeding hole; 43, water return hole; 44, insertion protrusion; 45, wire feeding hole; 46, annular protrusion; 5, gun cable seat; 51, second limiting part; 52, second end face; 53, second water inlet channel; 54, second gas feeding channel; 55, second water return channel; 56, second wire feeding channel; 57, foolproof tooth; 58, outer end face. DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0023] Embodiments of the present application: As Figures 3-4As shown, the welding gun neck seat and gun cable seat matching structure, including gun neck seat 3, gun cable seat 5 and installed between the sealing pad 4, through the sealing pad 4 to realize the corresponding water, gas sealing at the interface.

[0024] Gun neck seat 3, including a plurality of first limiting part 31 is arranged along the circumferential direction, each first limiting part 31 of gun neck seat 3 is arranged on the cylindrical plug end. The first limiting part 31 is the outer tooth, which can be completed by gear cutting or die extrusion, with low batch production cost and high efficiency.

[0025] One end surface of gun neck seat 3 is provided with first water inlet channel 34, first backwater channel 36, first wire feeding channel 33, first gas feeding channel 35. The one end surface of gun neck seat 3 is a plane structure, defined as the first end surface 32; each channel is designed perpendicular to the end surface. This structure is obviously different from the existing technology in which several cylinders are brazed on the end surface. The small cylinder structure is omitted, that is, the steps of separately processing each cylinder (corresponding to the hollow cylindrical structure of gas and water channels) and welding are omitted, and the structure is simplified, improving the reliability.

[0026] Gun cable seat 5, including a plurality of second limiting part 51 is arranged along the circumferential direction, one end surface of gun cable seat 5 is provided with second water inlet channel 53, second backwater channel 55, second wire feeding channel 56, second gas feeding channel 54. One end surface of gun cable seat 5 is a plane structure, defined as second end surface 52, and the one end surface of gun cable seat 5 is concave. The one end surface of gun cable seat 5 is the bottom surface of the circular groove, and each second limiting part 51 is distributed on the inner side wall of the circular groove, that is, the inner circumferential surface. The second limiting part 51 is the inner tooth.

[0027] The second limiting part 51 and the first limiting part 31 are inserted and matched to realize the rotation stopping cooperation of the gun neck seat 3 and the gun cable seat 5, improve the strength after the butt joint of the two, so as to cancel the additional pin which plays the role of axial connection and anti-torsion. After canceling the pin and the pin hole, the effective utilization area of the first end surface 32 and the second end surface 52 is increased, the hole diameter of the gas channel and the water channel can be designed relatively larger, the cooling effect is improved, and the risk of blockage of the channel by impurities and copper rust is reduced. The anti-torsion function between gun neck seat 3 and gun cable seat 5 is completed by the meshing between inner tooth and outer tooth. The more the number of teeth is, the larger the meshing area is, and the higher the anti-torsion strength is.

[0028] Further optimization, one of the outer teeth and one of the inner teeth are mutually matched anti-stupid teeth 57 (one side is marked), which are different from the shapes of other outer teeth and inner teeth, so as to be easily distinguished, thereby facilitating the butt joint of gun neck seat 3 and 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 torch cable seat mating structure of the present invention has the following technical advantages: (1) Abandon the existing technology in the small cylinder and O-ring scheme, the whole structure without small, broken parts, improve the reliability of components; also saved the separate processing and welding with the base step, simplifying the structure and manufacturing process.

[0037] (2) In the gun neck seat and gun cable seat joint overall size unchanged, the channel hole diameter can be at least the original cylindrical structure of the outer diameter size, and can increase the water channel, gas channel area, improve the cooling effect, but also reduce the risk of channel blocked by impurities and copper rust.

[0038] (3) With a whole rubber pad, instead of the existing technology in the multiple small O-ring, the rubber pad on the design of the corresponding hole, hole, gas hole, water inlet hole, back hole, and the edge of the hole is provided with a convex, to increase the sealing, because the size and elastic allowance of rubber pad can be done larger, and the sealing structure from the original hole, shaft cooperation into a plane compression fit, reduce the processing difficulty, also greatly improve the use of reliability and sealing life.

[0039] (4) The tooth shape design of the inner and outer teeth can be designed as a foolproof structure, part of the teeth are designed to be different from the tooth shape of the other teeth, and there is only one direction between the gun neck seat and the gun cable seat. Insertable, to ensure the consistency of the installation direction each time.

[0040] (5) The inner and outer teeth can be completed by gear cutting or die extrusion, with low batch production cost and high efficiency.

[0041] (6) The inner and outer teeth are engaged between the gun neck seat and the gun cable seat, and the anti-torsion function is realized. The more the number of teeth is, the larger the meshing area is, and the higher the anti-torsion strength is.

Claims

1. A structure for the cooperation between a gun neck seat and a gun cable seat, characterized in that: The gun neck seat comprises a plurality of first limiting parts arranged at intervals in the circumferential direction, and one end surface 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 gas feeding channel. The gun cable seat comprises a plurality of second limiting parts arranged at intervals in the circumferential direction, and one end surface of the gun cable seat is provided with a second water inlet channel, a second water return channel, a second wire feeding channel and a second gas feeding channel. The sealing gasket is located between the gun neck seat and the gun cable seat.

2. The welding torch neck seat and cable seat mating structure of claim 1, wherein: The sealing gasket is provided with an annular protrusion outside the water inlet hole, the water return hole, the wire feeding hole and the gas feeding hole, which is used to form a sealing part in sealing cooperation with one end surface of the gun neck seat or one end surface of the gun cable seat.

3. The welding torch neck seat and cable seat mating structure of claim 2, wherein: The sealing gasket is provided with a cylindrical plug at at least one of the water inlet hole, the water return hole, the wire feeding hole and the gas feeding hole, which is used to be inserted into the corresponding channel of the gun neck seat or the gun cable seat.

4. The welding torch neck seat and cable seat mating structure according to claim 3, wherein: The sealing gasket is provided with a cylindrical plug at each of the water inlet hole, the water return hole, the wire feeding hole and the gas feeding hole, which is used to be inserted into the second water inlet channel, the second water return channel and the second gas feeding channel of the gun cable seat, respectively.

5. The welding torch neck seat and cable seat mating structure of claim 1, wherein: One end surface of the gun neck seat or one end surface of the gun cable seat is a flat structure.

6. The welding torch neck seat and cable seat mating structure of claim 1, wherein: The first limiting part is an external tooth, and the second limiting part is an internal tooth.

7. The welding torch neck seat and cable seat mating structure according to claim 6, wherein: One external tooth and one internal tooth are mutually matched foolproof teeth.

8. The welding torch neck seat and cable seat mating structure of claim 1, wherein: The first limiting part is a protruding strip, and the second limiting part is a recess.

9. The welding torch neck seat and cable seat mating structure of claim 1, wherein: Each first limiting part of the gun neck seat is arranged on a cylindrical plug-in end head, the gun neck seat is provided with an axial limiting shaft shoulder, and one end surface of the gun cable seat is formed in a concave shape.

10. The welding torch neck seat and cable seat mating structure of claim 9, wherein: One end surface of the gun cable seat is formed in a concave bottom surface of a circular groove, and each second limiting part is distributed on the inner side wall of the circular groove.

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