KR200144441Y1 - Power connector of welder - Google Patents

Abstract

The present invention discloses an improved power connector for connecting a power cable of a welder.

The conventional power connector is to twist the fixing pin of the plug to the L-shaped groove of the socket, there is a problem that is easily separated by an external impact or the like to stop the welding work or cause a safety accident.

In the present invention, the coupling lever and the locking step are formed correspondingly to the plug and the socket so that the power connector is maintained in a stable coupling state by the combination of both.

Description

Power connector of welder

1 is a block diagram showing the general configuration of a semi-automatic carbon dioxide welding machine.

2 is a main perspective view showing a connection portion of a cable and a hose in a conventional connection method.

3 is a partially cutaway exploded side cross-sectional view of the power connector of FIG.

Figure 4 is an exploded perspective view showing the configuration of the power connector of the present invention.

5 is a partially cutaway exploded side cross-sectional view.

6 and 7 are side views showing other configurations of the inventive socket.

* Explanation of symbols for main parts of the drawings

10: plug 11: insulation jacket

12: connection terminal 20: socket

21 Insulation jacket 22 Coupling mount

30: coupling lever 31: hook

40: jam jaw 41: inlet groove

The present invention relates to a power connector for connecting a power cable of a welder, and more particularly to a power connector suitable for use in a protective gas metal arc welder.

Shield gas metal arc welding (shield gas metal arc welding) is a welding method to form a welding atmosphere with a protective gas to improve the welding efficiency and quality, and to enable the welding of the material impossible by the coated arc welding. Protection is also (Tungsten Inert Gas) TIG gas metal arc welding the welding processes, such as rain (非) yonggeuk (溶極) expression welding process and, MIG (Metal Inert Gas) or carbon dioxide (CO ₂₎ or MAG (Meta Active Gas) welding techniques, such as There is a melt welding method using a consumable electrode. In molten protective gas metal arc welding, a metal wire is used as a consumable electrode to continuously supply a welding rod. In this case, a wire feeding device is a wire feeding device.

FIG. 1 shows a general configuration of a semi-automatic carbon dioxide gas welding machine. A molten protective gas metal arc welding machine such as a MIG welding machine has a configuration substantially similar thereto.

In FIG. 1, the welding machine V connected to the power source AC supplies a welding current and carbon dioxide gas (inert gas in the case of MIG, mixed gas in the case of MAG) is supplied from a gas bomb B. A wire feeder (F) is used for continuous supply of the wire (W). The wire (W) is wound around the spool (S) installed in the wire feeder (F) and the wire feeder (F). ) Is supplied to the torch (T).

The wire feeder (F) is composed of a portable size and weight for the convenience of welding work, and between the welding machine (V) and the gas cylinder (B), a power cable (P), a control cable (C), and a gas hose, which are usually several tens of meters long, Connected to (G).

The welding current supplied to the power cable P is connected to the wire W fed from the wire feeder F, and the atmosphere gas such as carbon dioxide gas supplied to the gas hose G is connected to the wire W from the torch T. Is sprayed around). Meanwhile, the control cable C transmits a control signal for controlling the welding machine V from the wire feeder F or a separate controller.

Here, the coupler (K1) of the power cable (P) and the coupler (K2) of the control cable (C) is a power cable (P) rather than separately manufactured to be fixed to the connection portion (L) of the wire feeder (F). ) Or the control cable (C) as needed, and install the connector of the general configuration to the connection (L).

The connector of the power table P is generally referred to as a power connector, and the configuration of the power connector used as the coupler K1 of the power cable P in FIG. 2 is shown in FIG.

In FIG. 3, the power connector is composed of a male and a couple of plugs 10 and a socket 20 that can be coupled to and detached from each other. First, the plug 10 is provided with a connection terminal 12 of a conductive metal which is covered with an insulating sheath 11 such as rubber or plastic and protrudes. On the other hand, the socket 20 is constituted by a connection mount 22 of a conductive metal having a connection hole 23 into which the connection terminal 12 is to be inserted and covered with an insulating shell 21 such as rubber.

In order to maintain the engagement state of the plug 10 and the socket 20, the fixing pin 13 protrudes from the tip of the connection terminal 12 of the plug 10, and the connection hole of the connection mount 22 is formed. On one side of 23, an L-shaped groove 24 corresponding thereto is formed.

In the L-shaped groove 24, the fixed end 25 is extended by 90 degrees from the inside thereof. When the connecting terminal 12 is inserted into the connecting hole 23, the fixing pin 13 of the connecting terminal 12 becomes L. When the socket 10 and the mount 20 are twisted by a predetermined angle, the fixing pin 13 enters the inside of the fixed end 25 of the L-shaped groove 24 and enters the socket 10 and the socket 10. This prevents axial separation of the mount 20.

However, since such a power connector is used in a welding site with a harsh working environment, it is easy to be touched or impacted by an operator or peripheral equipment. Since the plug 10 and the socket 20 of the power connector are twisted and coupled, the fixing pin 13 of the plug 10 is fixed to the L-shaped groove 24 of the socket 10 by an external force such as an impact. Flows easily)

The separation of the plug 10 and the socket 20 is not only interruption of the welding work, but also welding work such as gas welding is mainly used in the construction site of ships or steel structures, so that a large power boosted to hundreds of A or thousands of V is possible. The risk of causing a fatal safety accident due to short-circuiting of the welding voltage was still present.

In addition, since the conventional L-shaped groove 24 is formed inside the connection hole 23, in order to manufacture it, the connection mount 22 has to be manufactured through expensive precision machining processes such as electric discharge machining, There was also a problem of increased cost.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a power connector of a welding machine that is easy to manufacture and which can maintain a stable coupling state.

In order to achieve the above object, the power connector according to the present invention has a hook at the tip of at least a plurality of positions on the outer circumference of the insulating shell of either the plug or the socket, and preferably elastically inward toward the inside. It is provided with a plurality of engaging levers for pressing, and when engaging the plug and the socket on the outer circumference of the insulation shell of the other of the plug or socket to form a locking jaw that is caught by the hook at a position corresponding to the position of the hook of the coupling lever It is done.

According to this configuration, when the plug is inserted into the socket, the hook of the coupling lever is elastically coupled to the locking jaw so that the coupling between the plug and the socket is stably maintained. Accordingly, problems such as interruption of welding work or occurrence of a safety accident are solved. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 and 5, the plug 10 is provided with a connection terminal 12 coated with an insulating sheath 11, and the socket 20 has a connection hole 23 into which the connection terminal 12 is to be inserted. The connection mount 22 formed is also covered with an insulating sheath 21.

Coupling lever 30 having a hook 31 formed at the tip of the plug 10 and the socket 20 in the outer circumference of the insulating shell 11 of any one of the plug 10 and the socket 20 (plug shown in the embodiment shown); ) Is provided in a plurality of at least two or more extending to the outside of the connection terminal (12).

The coupling lever 30 is hinged by a bracket 32 installed on the insulating shell 11, and is preferably elastically pressed inwardly by an appropriate elastic means. As the resilient means, the leaf spring 33 is illustrated on the upper side of FIG. 5 and the torsion spring 34 on the lower side, and the elastic means can be configured in various ways.

Meanwhile, the other end of the plug 10 or the socket 20, in the illustrated embodiment, corresponds to the tip hook 31 of the coupling lever 30 of the plug 10 when the outer shell of the insulation shell 21 is coupled to the socket 20 in the illustrated embodiment. In the position, the latching jaw 40 in which this hook 31 is caught is formed, respectively.

Accordingly, when the connecting terminal 12 of the plug 10 is inserted into the connecting hole 23 in the connecting mount 22 of the socket 20, the hook 31 of the coupling lever 30 is connected to the latching jaw 40. Hanging plug 10 and the socket 20 is maintained in a coupled state.

In this case, when the coupling lever 30 is not provided with an elastic means, the locking jaw 40 preferably has a size that the hook 31 can be brought into close contact and is coupled by press fit. On the other hand, when the elastic means such as the leaf spring 33 or the torsion spring 34 is provided, the locking jaw 40 may have a size with a margin.

However, in such a configuration, the coupling lever 30 of the plug 10 does not enter the alignment (align) state of the engaging jaw 40 of the socket 20, the coupling between the two is not made, even in the coupling state of the coupling lever ( Only the coupling between the tip hook 31 and the locking step 40 of the 30 is difficult to maintain a stable state of engagement.

Accordingly, an inlet groove 41 having a width into which the coupling lever 30 can enter is formed at the front end side of the insulation shell 11 of the socket 10 to guide the hook 31 directly to the locking jaw 40. It is desirable to.

In the coupling state of the plug 10 and the socket 20, the sidewalls 41a of the sidewalls 41a of the inlet groove 41 serve as a limiting jaw to prevent the coupling lever 30 from flowing, thereby more firmly coupling the power connector. Will be maintained.

Although the present invention has been described through one specific embodiment, the present invention may be configured in various ways as necessary.

For example, the illustrated embodiment is provided with two engaging lever 30 and the locking jaw 40, but may be configured by arranging three radially if necessary.

In addition, although the locking jaw 40 is shown in FIG. 4 and FIG. 5 as being composed of two grooves drawn from the outer surface of the insulating shell 21, the locking jaw 40 is shown in FIG. A locking jaw 40 'constituted by a groove extending in a ring shape along the outer circumference of the insulating sheath 21 of the socket 20, or as shown in FIG. It may be configured as a locking step (40) formed by giving a step (段 差).

In the configuration of FIGS. 6 and 7, since the locking projections 40 ′ and 40 are formed over the entire circumference of the socket 20, no separate inlet grooves (41 in FIGS. 4 and 5) are provided. It is preferable not to. Then, since the plug 10 and the socket 20 can be rotated relative to each other to maintain a coupled state, the plug 10 and the socket 20 can also prevent twisting of the power cable (P in FIGS. 1 and 2).

Regardless of the configuration, the power connector of the present invention has an effect of stably coupling the plug and the socket without separation, thereby ensuring the reliability and safety of the welding operation.

Claims (4)

A power connector of a welding machine, comprising: a plug in which a conductive connecting terminal is covered with an insulating sheath, and a socket in which a connection mount having a connection hole into which the plug is inserted is covered with an insulating sheath, wherein the plug 10 or the socket Two or more coupling levers 30 which are hinged on one of the insulating shells 11 and 21, and hooks 31 are formed at the ends thereof and extend outwardly of the connection terminal 12. And the hook 31 of the coupling lever 30 when the plug 10 and the socket 20 are coupled to each other on the insulating shell 11 and 21 of the plug 10 or the socket 20. It is installed at a corresponding position to guide the entrance of the engaging jaw (40, 40 ', 40) and the engaging lever 30, the side wall 41a of the plug 10 and the socket ( When the coupling 20 is coupled, the locking projection 40 of the plug 10 or the socket 20 is formed to prevent the coupling lever 30 from flowing. Is a power connector of the welder, characterized in that it comprises an inlet groove (41) formed in the end of the insulating sheath (21) of the side. The power connector of claim 1, wherein elastic means (33, 34) are provided to elastically press the coupling lever (30) inwardly. The power connector of claim 1, wherein the locking jaw (40 ′) extends in a ring shape along the outer circumference of the insulation shell (11, 21). The power connector of claim 1, wherein the locking step (40) is formed by giving a step to the insulation shell (11, 21).