KR200394104Y1 - Portable welding torch - Google Patents

Abstract

The present invention connects the torch body case to the back of the electrode holder for easy welding at home or factory, installs an inverter therein, and uses a high frequency transformer using air core or ferrite core to reduce the size and weight of the inverter. The present invention relates to a portable welding torch having a blower installed at a rear side thereof to supply air to a heat sink, and a welding rod holder (20) for holding a welding rod (21); A torch body case 30 connected to the rear of the electrode holder 20 and having an outlet 31 through which air is discharged; An inverter 40 installed inside the torch body case 30; A blower (50) installed at the rear of the torch body case (30); A handle 60 attached to the bottom of the torch body case 30; An operation switch 61 installed on the handle 60; It is composed of a clamp 70 which provides a negative electrode to the base material to be welded, and is easy to carry by embedding a welding rod holder and an inverter in a case of one body, and by installing a blower at the rear of the body case. The heat generated can be released into the air.

Description

Portable welding torch {Portable welding torch}

The present invention relates to a portable welding torch, in particular to connect the torch body case to the back of the electrode holder for easy welding at home or factory, to install the inverter therein and to reduce the size and weight of the inverter air core or ferrite The present invention relates to a portable welding torch using a high frequency transformer using a core and a blower installed at a rear thereof to supply air to a heat sink.

The inverter used in conventional electric welding converts a direct current rectified from a commercial power source into an alternating current using a plurality of electronic switches, and then converts the voltage into a transformer and rectifies the resulting direct current. In this way, the inverter needs to convert commercial power into high voltage and high current power using electronic switches and transformers. Therefore, heavy and bulky transformers with iron cores are used.

1 shows an inverter welder used for conventional electric welding.

The inverter 1 includes an electronic switch, a control element, a rectifier element, a transformer, and the like to convert commercial power into high voltage and high current power. The high voltage and high current power generated by the inverter 1 is supplied to the electrode holder 2 through the electric wire 6 and flows to the base material 4 to be welded through the electrode 3 so as to be heated by high voltage and high current. This occurs and the base material 4 and the welding rod 3 are melted and welded to each other. At this time, the high voltage and high current supplied to the base material return to the inverter 1 through the clamp 5 and the electric wire 6.

As such, the conventional electric welding machine is inconvenient to move and simple welding at home or factory site because it uses an inverter with a bulky and heavy transformer to convert commercial power into high voltage and high current.

In order to eliminate the inconvenience of the conventional electric arc welding machine, an electric arc welding machine which can be carried in Utility Registration No. 20-0270921 is disclosed, and a perspective view showing the configuration thereof is shown in FIG.

This conventional electric arc welder is provided with a connecting portion 8 formed of (+) and (-) at the lower end of the body on which the handle 7 is formed. The control unit 9 is provided with a switch to adjust the current in the upper portion of the connection (8). A reel 10 having a rotary handle 10a attached to the rear of the body may be rotatably integrated, and a headlamp 130 for selectively illuminating the light may be mounted inside the body 11. do. In addition, by attaching the shoulder strap 13 to the seating groove 12 on the upper surface of the welder, it is possible to weld while carrying on the shoulder of the welder.

This conventional electric arc welding machine is inconvenient to carry by attaching a shoulder strap to carry a conventional inverter, and was inconvenient to simply weld in a home or a factory.

The present invention was devised to solve various problems as described above, and an object of the present invention is to provide a portable welding torch that is built in a welding rod holder and reduces the volume and weight of the inverter.

Another object of the present invention is to provide a portable welding torch that can discharge the heat generated from the built-in inverter and the handle into the air by installing a blower in the electrode holder.

Still another object of the present invention is to provide a portable welding torch which can be manipulated by a finger to hold the welding rod while the welding torch is held by the handle.

Portable welding torch according to the present invention for achieving the above object and the electrode holder for holding the electrode; A torch body case connected to the rear side of the electrode holder and having a discharge port through which air can be discharged; An inverter installed inside the torch body case; A blower installed at a rear side of the torch body case; A handle attached to a bottom surface of the torch body case; An operation switch installed at the handle; It consists of a clamp that provides a negative electrode to the substrate being welded.

The electrode holder is cylindrical with a closed front, a holder cap for covering and protecting the front of the holder having a welding rod insertion hole is formed over the right middle and side of the front surface; A holding stator, which is a part into which a welding rod is fitted, and a holding stator, which are integral with the holding stator, and having a spring cavity, a first wheel cavity, and a pull lever cavity, in which a traction spring, a first wheel, and a traction lever are respectively installed. A fixed body; A holding mover in close contact with the holding stator under the close contact force by the traction spring; A traction spring installed in the spring cavity to provide traction to a traction line inserted therein; A first wheel installed in the first wheel cavity and changing the direction of the tow line to convert to the second wheel; A second wheel for changing the direction of the tow line coming out of the first wheel) to switch to the tow lever; Characterized in that the traction lever is fixed to the traction cord that is changed in direction from the second wheel.

The electric wire for supplying the high voltage and the high current generated by the inverter to the lever is attached to the inner surface of the neck portion connecting the torch body and the lever while being spirally attached to be cooled by the wind of the blower passing through the torch body. It features.

In order to reduce the volume and light weight of the transformer constituting the inverter, it is characterized by using a high frequency transformer using a hollow core or ferrite core.

In order to cool the heat generated in the reactor constituting the inverter, the reactor is disposed on the front of the heat sink to contact the air discharged through the heat sink, characterized in that for cooling the heat generated in the reactor.

Hereinafter, the configuration, operation and effects of the present invention will be described in detail with reference to the accompanying drawings showing examples.

3 is an exploded perspective view showing a portable welding torch according to the present invention.

Portable welding torch according to the present invention and the electrode holder 20 for holding the electrode 21; A torch body case 30 connected to the rear of the electrode holder 20 and having an outlet 31 through which air is discharged; An inverter 40 installed inside the torch body case 30; A blower (50) installed at the rear of the torch body case (30); A handle 60 attached to the bottom of the torch body case 30; An operation switch 61 installed on the handle 60; And a clamp 70 providing a negative electrode to the base material to be welded.

4 is an exploded perspective view of the electrode holder and the holder lever.

The electrode holder 20 has a cylindrical cap with a closed front face, and includes a holder cap 21 for covering and protecting the front side of the holder 20 having a welding rod insertion hole 21a which is formed over the right middle side and the middle side of the front face; Spring cavities integral with the holding stator 22a and the holding stator 22a, which are portions to which the welding rod is fitted, and the traction spring 25, the first wheel 27, and the traction lever 29 are respectively installed therein. A holding stationary body 22 in which a portion 22c, a first wheel cavity 22d and a pull lever cavity 22e are formed; A holding mover 23 which is in close contact with the holding stator 22a by a close contact force by the traction spring 25; A traction spring (26) installed in the spring cavity (22c) to provide traction to the traction cord (25) fitted therein; A first wheel (27) installed in the first wheel cavity (22d) to change the direction of the tow line (25) to switch to the second wheel (228); A second wheel 28 for changing the direction of the tow line 25 exiting the first wheel 27 to switch to the tow lever 29; It is composed of a traction lever 29 is fixed to the traction cord 25 that is changed in direction from the second wheel (28).

The holder cap 21 covers the holding stator 22a and the holding mover 23 of the electrode holder 20 to prevent contact with external objects or workers to prevent electric shock and short circuit. A welding rod insertion hole 21a is formed in the front right side and the middle side of the front face of the holder cap 21 so that the welding rod 21b is formed even when the holder cap 21 covers the holding stator 22a and the holding mover 23. It can be fitted between the holding stator 22a and the holding mover 23.

The holding fixing body 22 is integral with the holding stator 22a and the holding stator 22a in close contact with the holding mover 23 to sandwich the welding rod 21b therebetween, and has a traction spring therein. 26, the body part 22b in which the spring cavity 22c in which the 1st wheel 27 and the pull lever 29 are respectively installed, the 1st wheel cavity 22d, and the pull lever cavity 22e are formed, respectively. It consists of.

The holding mover 23 is connected to the tow line 25 by a screw 23c which is inserted into and fixed to a fixture 25a attached to one end of the tow line 25. It is fitted to the mover fitting portion 22f formed at the front end of the body portion 22b in a state connected to the tow line 25, wherein the tow spring 26 fitted to the tow line 25 is a spring cavity 22c. Since the holding mover 23 is pushed forward, the holding mover 23 is brought into close contact with the holding stator 22a.

The welding rod fitting groove 23a is formed on the front surface of the holding mover 23 so that the welding rod 21b can be inserted by the welding rod fitting groove 23a when the holding mover 23 comes into close contact with the holding stator 22a. A space is formed.

When the first wheel cavity 22d is formed in the middle of the body portion 22b, it is with the spring cavity 22c through the tow line hole 22g, and the wheel fixing screw 27b fastened to the screw hole 22h. Is fitted through the hinge hole 27a of the first wheel 27 and is fixed to the body portion 22b so that the first wheel 27 is pivotally installed on the wheel fixing screw 27b.

Thus, the traction cord 25 connected to the holding mover 23 exits the first wheel cavities 22d through the traction cord holes 22g via the spring cavities 22c and winds around the first wheel 27 half a turn. Uh, we switch down.

The tow line 25 wound on the first wheel 27 and turned down is wound on the second wheel 28 again and its direction is reversed, and the end thereof is fixed to the tow lever 29 by the tow line fixing screw 29c. Is fixed by.

In the state where the second wheel 28 is sandwiched between a pair of fixing protrusions 29d and 29d formed on the front surface of the pull lever 29, the second wheel fixing screw 28b has a hinge hole 28a and a protrusion hole 29d. And the second wheel fixing screw 28b as a hinge axis is rotatably installed.

The pull lever 29 has a rectangular flange-shaped protrusion 29a formed thereon, and a hinge hole 29b is formed at the center of the protrusion 29a. The projection 29a can be rotated forward and backward by the hinge hole 29a being fitted and fixed by the lever fixing screw 29e fitted in the lever fixing hole 22i while being fitted in the lever cavity 22e. Is installed.

5 is an assembled perspective view of the electrode holder.

The holder cap 21 has a welding rod insertion hole 21a formed over the right side and the middle side of the front face thereof, so that the welding rod can be held even when the holder cap 21 covers the holding stator 22a and the holding mover 23. 21b can be fitted between the holding stator 22a and the holding mover 23.

In other words, when the pull lever 29 is pulled back, the pull line 25 attached thereto is pulled back, and the holding mover 23 is reversed accordingly. When the holding mover 23 moves backward, a gap is formed between the holding stator 22a and the welding rod 21b is inserted into this gap, and when the lever 29 is released, the retracting lever 29 is released by the elasticity of the traction spring 26. As the holding mover 23 is advanced to come into close contact with the holding stator 22a, the melting rod 21b sandwiched therebetween is held.

Torch body case 30 is shaped like a bottle with a spout, the front surface corresponding to the spout of the bottle is coupled to the upper portion of the welding holder 20 by a coupling screw (not shown) or the like. In addition, the neck portion of the torch body case 30 is formed with a plurality of outlets 31 through which air can be discharged so that the air sucked from the blower 50 installed in the rear of the torch body case 30 is discharged.

The body of the torch body case 30 has a hollow cylindrical shape, and the components constituting the inverter 40 are installed therein. In order to reduce the volume and weight of the transformer 43 of the inverter 40, a high frequency transformer using air core or ferrite core is used.

In addition, in order to cool the heat generated in the reactor 41 of the inverter 40, the reactor 41 is disposed on the front surface of the heat sink 44 to bring the reactor 41 into contact with the air discharged through the heat sink 44. Cool the heat generated from

In order to supply the high voltage and high current output from the reactor 41 of the inverter 40 to the lever 20 holding the welding rod 21, the electric wire 42 is extended from the reactor 41 so that the rear surface of the lever 20 is extended. It is connected to the connector 24 protruding to.

Since high voltage and high current flow through the electric wire 42, heat is generated. Therefore, in order to cool the heat generated by the electric wire 42, the spirally attached to the inner surface of the neck portion of the torch body case 30 to be cooled by the flow of air passing through the neck portion of the torch body case 30. .

Figure 6 shows the installation state of the electric wire installed inside the enlarged inner surface of the neck portion of the torch body case according to the present invention.

Torch body case 30 is a pair of left and right as shown in Figure 3 so that the two can be separated to install an inverter 40 therein. In addition, the electric wire 42 extending from the reactor 41 of the inverter 40 is connected to the connector 24 formed to protrude to the rear end of the lever 20, the electric wire 42 is connected to the connector 24 Before it is attached while forming a spiral on the inner surface of the neck portion 32 of the torch body case 30. Therefore, since it is in contact with the wind blown by the blower 50, heat generated by the high voltage and high current is lost to the blown wind, and the electric wire 42 is cooled.

A handle 60 is formed at the bottom of the torch body case 30, and a switch 61a and a trigger 61b for pressing the switch are installed at an upper portion of the handle 60. When the trigger 61b of the switch 61a is turned on, commercial power is supplied to the inverter 40 and the blower 50.

When the commercial power source is connected to the inverter 40, the inverter 40 rectifies, smoothes, and switches the commercial power source to AC and converts the commercial power source to a high voltage to generate a high voltage and high current, and the reactor 41. After the reactive power is removed, the electric power is supplied to the lever 20 through the electric wire 41. The welding rod 21 is bitten to the lever 20 so that a high voltage and a high current are supplied. When the user contacts the welding rod 21 with the base metal, an arc is generated due to the flow of the high voltage and high current, and the welding rod and the base material melt by the heat. Melt and adhere to each other.

On the other hand, when the trigger 61b is pressed, the commercial power is also supplied to the blower 50 to blow the blower 50, and the blown air takes heat from the heat exchanger 44 and contacts the heat exchanger 44. Cool the switching and rectifiers.

The heat exchanger 44 according to the present invention is composed of a pair of left and right heat sinks 44a and 44b, and the heat sinks 44a and 44b are installed such that fin-shaped portions face each other, and are almost adjacent or overlapped with each other. The sealed air passage is formed to increase the heat exchange rate of the heat sinks 44a and 44b.

The blower 50 is installed on the rear surfaces of the heat sinks 44a and 44b thus formed, so that the blown wind passes directly between the heat sinks 44a and 44b to increase the blowing efficiency.

As described above, according to the portable welding torch of the present invention, a welding rod holder and an inverter are built into a case of one body for easy portability, and a blower is installed at the rear of the body case to draw heat generated from the built-in inverter and the handle into the air. Can be discharged.

1 is an inverter welding machine used in conventional electric welding,

2 is a conventional portable electric arc welding machine,

3 is an exploded perspective view showing a portable welding torch according to the present invention;

4 is an exploded perspective view of a welding rod holder and a holder lever;

5 is an assembled perspective view of the electrode holder;

Figure 6 is an installation state of the electric wire is installed inside the enlarged inner surface of the neck portion of the torch body case according to the present invention.

<Description of Symbols for Main Parts of Drawings>

20: electrode holder 21: holder cap

30: torch body case 31: outlet

32: Thu 40: Inverter

41: reactor 42: electric cable

43: transformer 44: heat sink

50: blower 60: handle

61a: switch 61b: trigger

70: clamp

Claims (5)

A welding rod holder 20 for holding the welding rod 21; A torch body case 30 connected to the rear of the electrode holder 20 and having an outlet 31 through which air is discharged; An inverter 40 installed inside the torch body case 30; A blower (50) installed at the rear of the torch body case (30); A handle 60 attached to the bottom of the torch body case 30; An operation switch 61 installed on the handle 60; A portable welding torch, comprising: a clamp (70) for providing a negative electrode to a substrate to be welded. The method of claim 1, The electrode holder 20 is cylindrical with a closed front, and includes a holder cap 21 for covering and protecting the front side of the holder 20 having a welding rod insertion hole 21a that is formed over the right side and the middle side of the front face. ; Spring cavities integral with the holding stator 22a and the holding stator 22a, which are portions to which the welding rod is fitted, and the traction spring 25, the first wheel 27, and the traction lever 29 are respectively installed therein. A holding stationary body 22 in which a portion 22c, a first wheel cavity 22d and a pull lever cavity 22e are formed; A holding mover 23 which is in close contact with the holding stator 22a by a close contact force by the traction spring 25; A traction spring (26) installed in the spring cavity (22c) to provide traction to the traction cord (25) fitted therein; A first wheel (27) installed in the first wheel cavity (22d) to change the direction of the tow line (25) to the second wheel (28); A second wheel 28 for changing the direction of the tow line 25 exiting the first wheel 27 to switch to the tow lever 29; Portable welding torch, characterized in that consisting of a traction lever 29 is fixed to the traction cord 25 that is changed in direction in the second wheel (28). The method of claim 1, An electric wire 42 for supplying the high voltage and high current generated by the inverter 40 to the electrode holder 20 spirally forms an inner surface of a neck portion connecting the torch body 30 and the electrode holder 20. Portable welding torch, characterized in that the cooling by the wind of the blower (50) passing through the torch body 30 is attached while rotating. The method of claim 1, Portable welding torch, characterized in that to use a high frequency transformer using a hollow core or ferrite core to reduce the volume of the transformer (43) constituting the inverter (40) and light weight. The method of claim 1, In order to cool the heat generated in the reactor 41 constituting the inverter 40, the reactor 41 is disposed on the front surface of the heat sink 44 so as to be in contact with the air discharged through the heat sink 44. Portable welding torch characterized in that to cool the heat generated in 41).