Structure of a welding torch for an electric spark surfacing repair machine

Abstract

The present invention discloses a welding torch structure of an electric spark surfacing repair machine, which includes: a front cover of the welding torch, a wire clamp, a threaded sleeve, a set screw, an outer sleeve, a snap ring, a bearing I, a main shaft assembly, a spring, a carbon brush assembly, an inner sleeve, a bearing II, an insulating coupling, a motor coupling, a reduction motor assembly, a screw I, a hand-held gun sleeve and a screw II. The carbon brush assembly structure of the present invention is not prone to electric spark erosion, making the structure of the carbon brush body smaller and the carbon brush wire not need to be exposed outside, so that the welding torch can be used stably and safely; the carbon brush is installed inside the outer sleeve, and the elastic force of the spring makes the carbon brush closely fit on the outer side of the brass sleeve of the main shaft assembly to form reliable conduction. The outer sleeve, the threaded sleeve and the insulating coupling are all made of non-metallic materials to improve the heat insulation and insulation effects of the welding torch; the carbon brush assembly is enclosed inside the gun body, and external splashing metal particles cannot enter.

Description

Technical Field

[0001] The present invention relates to the field of technical welding devices, and particularly to a welding torch structure of an electric spark surfacing repair machine. Background Art

[0002] The welding torch of an electric spark surfacing repair machine is an important electromechanical device. For example, a water-cooled electric spark repair machine welding torch with the application number 201720039157.4 includes a wire clamp, a carbon brush, a carbon brush fixing body, a gun housing, a tail flange, a water-cooling body, a first water pipe, a second water pipe, a motor, a cable clamp block, a connecting cable, a water circulation cavity, a gun shaft, a cable connecting piece, a spring insulating bracket, a spring and a bearing. The carbon brush fixing body is arranged at the front end of the water-cooling body, the spring is arranged at the rear end of the carbon brush fixing body, and the carbon brush is embedded at the front end of the carbon brush fixing body. The carbon brush fixing body and the carbon brush are driven to move back and forth by the spring, the water-cooling body does not move, and the bearing is directly attached to the water-cooling body, playing a role in cooling the bearing, with good cooling effect and extended service life. At the same time, the spring only pushes the carbon brush fixing body and the carbon brush, with light weight and no interference from other factors, and good pushing effect.

[0003] In the existing cold welding technology, during the operation of the welding torch, the following obvious defects often occur: 1. When the welding wire is surfacing with the workpiece, metal splash particles are generated and then fall between the carbon brush structure and the wire clamp, resulting in a gap between the carbon brush structure and the wire clamp, causing vibration and electric spark erosion between the carbon brush structure and the wire clamp; 2. The electric spark erosion will continuously damage the carbon brush body, leading to rapid consumption and damage of the carbon brush. At the same time, the vibration of the carbon brush structure will continuously pull the wire, easily causing the wire head to fall off, ultimately resulting in the welding torch being unable to work, affecting normal use, and reducing the service life and efficiency.

[0004] Therefore, it is necessary to improve and optimize the existing electric spark surfacing repair machine welding torch to meet the actual use requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding torch structure of an electric spark surfacing repair machine, which can effectively improve the service life and use efficiency of the welding torch, so as to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A welding torch structure of an electric spark surfacing repair machine includes: a welding torch front cover, a wire clamp, a threaded sleeve, a set screw, an outer sleeve, a circlip, a bearing one, a main shaft assembly, a spring, a carbon brush assembly, an inner sleeve, a bearing two, an insulating coupling, a motor coupling, a reduction motor assembly, a screw one, a hand-held gun sleeve and a screw two;

[0008] Among them, the main shaft assembly includes a main shaft and a brass sleeve, the carbon brush assembly includes a carbon brush body and a wire, and the reduction motor assembly includes a reduction motor and a motor connecting plate;

[0009] The front cover of the welding torch is arranged at the front end of the wire clamp, the wire clamp is fixed on the main shaft assembly, the main shaft assembly is fixed inside the inner sleeve through the first bearing and the second bearing, the snap ring fixes the axial positioning of the main shaft assembly, the carbon brush assemblies are distributed and symmetrically installed on both sides of the main shaft assembly and inside the outer sleeve, the spring makes the carbon brush body of the carbon brush assembly closely fit with the brass sleeve of the main shaft assembly, and the wire of the carbon brush assembly passes through the inner sleeve and the motor connecting plate;

[0010] The threaded sleeve is fixed at the front end of the inner sleeve through two set screws, the motor connecting plate is fixedly connected with the reduction motor, the motor connecting plate is installed at the tail of the inner sleeve through the first screw, the insulating coupling and the motor coupling are installed between the tail of the main shaft assembly and the front part of the reduction motor shaft, and the hand-held gun sleeve is installed at the tail of the outer sleeve through the second screw.

[0011] Preferably, there are 2 carbon brush assemblies, which are symmetrically distributed on the circumferential surface of the inner sleeve.

[0012] Preferably, the structural length of the inner sleeve is set to 20 mm - 200 mm.

[0013] Preferably, the main shaft and the brass sleeve are connected by interference fit, and the main shaft assembly and the inner sleeve are sequentially fixed and installed through a snap ring, the first bearing, and the second bearing.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The structure of the carbon brush assembly of the present invention is not prone to electric spark erosion, so that the structure of the carbon brush body becomes smaller, and the carbon brush wire does not need to be exposed outside, enabling the welding torch to be used stably and safely;

[0016] 2. The structure of the present invention installs the carbon brush inside the outer sleeve, and through the elastic force of the spring, the carbon brush is closely attached to the outer side of the brass sleeve of the main shaft assembly to form reliable conduction. The outer sleeve, the threaded sleeve, and the insulating coupling all use non-metallic materials, improving the heat insulation and insulation effects of the welding torch;

[0017] 3. The present invention encloses the carbon brush assembly inside the gun body, and external flying metal particles cannot enter. Description of the Drawings

[0018] Figure 1 is an exploded schematic view of the overall structure of the present invention;

[0019] Figure 2 is a schematic view of the split structure of the front section of the present invention;

[0020] Figure 3 Schematic diagram of the latter-stage splitting structure of the present invention;

[0021] Figure 4 Cross-sectional view of the overall structure of the present invention;

[0022] Figure 5 Schematic diagram of the overall structure of the present invention;

[0023] Figure 6 Schematic diagram of the splitting structure of the hand-held gun holster of the present invention;

[0024] Figure 7 Schematic diagram of the carbon brush assembly structure of the present invention;

[0025] Figure 8 Schematic diagram of the speed reduction motor assembly structure of the present invention;

[0026] Figure 9 Schematic diagram of the inner sleeve structure of the present invention;

[0027] Figure 10 Schematic diagram of the main shaft assembly structure of the present invention;

[0028] Figure 11 Cross-sectional view of the main shaft assembly of the present invention.

[0029] In the figure: 1 front cover of the welding torch, 2 wire clamp, 3 threaded sleeve, 4 set screw, 5 outer sleeve, 6 circlip, 7 bearing one, 8 main shaft assembly, 81 main shaft, 82 brass sleeve, 9 spring, 10 carbon brush assembly, 101 carbon brush body, 102 wire, 11 inner sleeve, 12 bearing two, 13 insulating coupling, 14 motor coupling, 15 speed reduction motor assembly, 151 motor connecting plate, 152 speed reduction motor, 16 screw one, 17 hand-held gun holster, 18 screw two. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-11 , the present invention provides a technical solution:

[0032] A welding torch structure of an electric spark surfacing repair machine, comprising: a welding torch front cover 1, a wire clamp 2, a threaded sleeve 3, a set screw 4, an outer sleeve 5, a circlip 6, a bearing one 7, a spindle assembly 8, a spring 9, a carbon brush assembly 10, an inner sleeve 11, a bearing two 12, an insulating coupling 13, a motor coupling 14, a speed reduction motor assembly 15, a screw one 16, a hand-held gun sleeve 17 and a screw two 18. The above-mentioned various fittings are connected and installed in sequence according to the illustrated order attached to the instruction manual, so as to form a welding torch. Figure 1 The welding torch is thus formed by connecting and installing the above components in the order shown in the attached drawings of the instruction manual.

[0033] Among them, the spindle assembly 8 is composed of a spindle 81 and a brass sleeve 82. The brass sleeve 82 is sleeved on the outer side wall of the spindle 81. The carbon brush assembly 10 includes a carbon brush body 101 and a wire 102. The carbon brush body 101 is fixedly connected to the wire 102. The speed reduction motor assembly 15 includes a speed reduction motor 152 and a motor connecting plate 151. The motor connecting plate 151 is fixed on the speed reduction motor 152 by four screws to form the speed reduction motor assembly 15.

[0034] The welding torch front cover 1 is arranged at the front end of the wire clamp 2. The wire clamp 2 is fixed on the spindle assembly 8. The spindle assembly 8 is fixed inside the inner sleeve 11 through the bearing one 7 and the bearing two 12. The circlip 6 fixes the axial positioning of the spindle assembly 8, so that the spindle assembly 8 cannot move axially and will not become loose. The carbon brush assemblies 10 are distributed and symmetrically installed on both sides of the spindle assembly 8 and inside the outer sleeve 5. The spring 9 makes the carbon brush body 101 of the carbon brush assembly 10 closely fit with the brass sleeve 82 of the spindle assembly 8. The wires 102 of the carbon brush assembly 10 sequentially pass through the inner sleeve 11 and the motor connecting plate 152, and the carbon brush assemblies 10 are all installed inside the outer sleeve 5. Moreover, the outer sleeve 5, the threaded sleeve 3 and the insulating coupling 13 are all made of non-metallic materials to improve the heat insulation and insulation effects of the welding torch. At the same time, the carbon brush assembly 10 is enclosed inside the gun body, and external splashing metal particles cannot enter.

[0035] The threaded sleeve 3 is fixed to the front end of the inner sleeve 11 by two set screws 4. The motor connecting plate 151 is fixedly connected to the speed reduction motor 152. The motor connecting plate 151 is installed at the tail of the inner sleeve 11 through the screw one 16. The insulating coupling 13 and the motor coupling 14 are installed between the tail of the spindle assembly 8 and the front part of the output shaft of the speed reduction motor 152. And the output shaft end of the speed reduction motor 152 passes through the motor connecting plate 151, so that the output shaft of the speed reduction motor 152 is connected to the motor coupling 14. And the hand-held gun sleeve 17 is installed at the tail of the outer sleeve 5 through the screw two 18. The hand-held gun sleeve 17 is used for the user to hold with the hand.

[0036] As a preference, as attached to the instruction manual Figure 3As shown, the carbon brush assembly 10 is provided with two pieces, symmetrically distributed on the circumferential surface of the inner sleeve 11. The inner sleeve 11 is provided with grooves for inserting the carbon brush assembly 10. During the working process, the carbon brush assembly 10 remains stationary while the main shaft assembly 8 makes a rotary motion.

[0037] As a preference, as shown in the attached drawings of the specification Figure 9 As shown, the structural length of the inner sleeve 11 is set to 20 mm - 200 mm, which is used to correspondingly realize the functions of inserting and installing the threaded sleeve 3, the main shaft assembly 8, the carbon brush assembly 10, the reduction motor assembly 15 and the outer sleeve 5.

[0038] As a preference, the main shaft 81 and the brass sleeve 82 are connected by interference fit. In this way, the connection effect between the main shaft 81 and the brass sleeve 82 is better. The main shaft assembly 8 and the inner sleeve 11 are fixedly installed in sequence through the circlip 6, the first bearing 7 and the second bearing 12, so as to realize the connection mode between the inner sleeve 11 and the main shaft assembly 8.

[0039] Working principle: In the present invention, the reduction motor 152 drives the main shaft assembly 8 to make a rotary motion, and at the same time drives the wire clamp 2 to make a continuous rotary motion. At the same time, the welding torch current is conducted to the wire clamp 2 through the carbon brush assembly 10 and then through the main shaft assembly 8. The carbon brush assembly 10 remains stationary while the main shaft assembly 8 makes a rotary motion. The carbon brush body 101 is closely attached to the outer side of the brass sleeve 82 of the main shaft assembly 8 through the spring 9 to conduct large current. This welding torch has a compact structure and no electric spark and electro-erosion phenomenon, so as to achieve the effects that the wire 102 is not exposed, the weight is reduced and the service life is extended.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Structure of the welding torch of an electric spark surfacing repair machine, characterized in that, it includes: welding torch front cover (1), wire clamp (2), threaded sleeve (3), set screw (4), outer sleeve (5), circlip (6), bearing one (7), main shaft assembly (8), spring (9), carbon brush assembly (10), inner sleeve (11), bearing two (12), insulating coupling (13), motor coupling (14), reduction motor assembly (15), screw one (16), hand-held gun sleeve (17) and screw two (18); wherein, the main shaft assembly (8) includes a main shaft (81) and a brass sleeve (82), the carbon brush assembly (10) includes a carbon brush body (101) and a wire (102), and the reduction motor assembly (15) includes a reduction motor (152) and a motor connecting plate (151); the welding torch front cover (1) is arranged at the front end of the wire clamp (2), the wire clamp (2) is fixed on the main shaft assembly (8), the main shaft assembly (8) is fixed inside the inner sleeve (11) through bearing one (7) and bearing two (12), the circlip (6) fixes the axial positioning of the main shaft assembly (8), the carbon brush assembly (10) is distributed and installed on both sides of the main shaft assembly (8) and symmetrically installed inside the outer sleeve (5), the spring (9) makes the carbon brush body (101) of the carbon brush assembly (10) closely fit with the brass sleeve (82) of the main shaft assembly (8), and the wire (102) of the carbon brush assembly (10) passes through the inner sleeve (11) and the motor connecting plate (151); the threaded sleeve (3) is fixed to the front end of the inner sleeve (11) through two set screws (4), the motor connecting plate (151) is fixedly connected with the reduction motor (152), the motor connecting plate (151) is installed at the tail of the inner sleeve (11) through screw one (16), the insulating coupling (13) and the motor coupling (14) are installed between the tail of the main shaft assembly (8) and the front part of the shaft of the reduction motor (152), and the hand-held gun sleeve (17) is installed at the tail of the outer sleeve (5) through screw two (18); there are 2 carbon brush assemblies (10), and they are symmetrically distributed on the circumferential surface of the inner sleeve (11); the structural length of the inner sleeve (11) is set to be 20mm - 200mm.

2. The structure of the welding torch of an electric spark surfacing repair machine according to claim 1, characterized in that: the main shaft (81) and the brass sleeve (82) are connected by interference fit, and the main shaft assembly (8) and the inner sleeve (11) are fixedly installed in sequence through a circlip (6), bearing one (7), and bearing two (12).

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