JPS607901Y2 - Welding torch power supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device mainly applied to a welding torch attached to the wrist of an industrial robot.

The applicant of this application has previously developed a method for attaching this kind of solution torch.
A wrist mechanism is constructed by arranging a pair of sprocket bodies on both outer sides in a rotating case having a rotating shaft extending forward, and a welding torch is superimposed and bonded to the front of the rotating shaft using a power supply body at its root. I proposed a formula to derive it, but
In this case, the power supply body, together with the welding torch, is rotated and oscillated by the operation of the wrist mechanism, and when a power supply cable or other power supply means is attached to it, it may be twisted or bent. This is undesirable because it tends to impair durability and puts a large load on the wrist mechanism.

The purpose of the present invention is to obtain a device that does not have the above disadvantages.A rotating case 2 having a rotating shaft 1 extending forward is provided with a pair of sprocket bodies 3 on both outer sides. In the mechanism 4, a welding torch 5 is overlapped and bonded to the front surface of the rotating shaft 1 with a power supply 6 at its root, and a guide is provided through a bracket 7 extending forward to the rotating case 2. A block 8 is fixedly installed, and a power supply brush 9 is provided on the block 8, and the brush 9 is brought into contact with the circumferential surface of the power supply body 6.

To explain in detail what is shown in the figure, the wrist mechanism 4 is a frame housing 11 at the tip of an arm member 10 extending forward from the robot body.
One of the two sprocket bodies 3, 3 is connected to the rotating case 2 via a pin 12, etc., and the other is connected to the rotating shaft 1 via a bevel gear mechanism 13.
Accordingly, according to the other rotation, the rotary shaft 1 is rotated about the longitudinal axis X-X, and when the one rotation is performed, the rotary shaft 1 is rotated along with the rotary case 2. 2 axis, that is, the horizontal axis Y-Y, to give a so-called swinging motion.

In the drawings, reference numeral 14.14 indicates a chino that drives each sprocket body 3.3.

As clearly shown in FIG. 2, the bracket 7 extends on the upper surface of the power supply body 6 and has the guide block 8 on its lower surface with an insulating layer 1.
The power supply brush 9 is slidably supported by the power supply brush 9 and extends downward, and is resiliently repelled downward by a spring 16 at the base.

The block 8 extends laterally and is provided with a power supply section 17 at its outer end, and the brush 9 is connected to the power supply section 17 via a flexible power supply member 18.

The torch 5 has a core wire guide member 19 at its tail end, which is fitted into the power supply body 6, and is fastened thereto with a cap nut 20 on the front surface.

Further, the power supply body 6 is superimposed on the front surface of the rotating shaft 1 via an insulating material 21 and fixed with a screw 22, and has a rotary case 23 on the outer periphery of the front thereof, which is prevented from rotating with a pin 24. In addition, a gas supply port 25 is provided.

To explain its operation, as described above, the operation of the wrist mechanism 4 freely imparts rotation and oscillation to the rotating shaft 1, and the welding torch 5, together with the power supply body 6 at the base, is accompanied by this. When rotating, the power supply body 6 only causes sliding on the circumferential surface between it and the power supply brush 9, and good power supply is continued.Furthermore, when the power supply body 6 swings, the power supply body 6 moves against the power supply brush 9. 9 integrally interlocks with the rotating case 2,
In this way, both 6 and 9 are maintained in their contact state, and the same good power supply is continued, and furthermore, during such operation, the power supply section 17 only moves to some extent along with the rotating case 2. No twisting or bending occurs in the power supply cable or other power supply means between the power supply and the power source.

In this way, according to the present invention, the power supply brush 9 is provided on the side surface of the power supply body 6 and is in contact with the power supply brush 9, and this is supported by the guide block 8 fixed on the rotating case 2 side. When connecting to an external power source via a cable or other power supply means, there is no twisting or bending of the cable, which has the effect of eliminating the above-mentioned disadvantages.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway plan view of one example of the proposed device;
The figure is a sectional view taken along the line ■-■, and Figure 3 is a front view thereof. 1... Rotating shaft, 2... Rotating case, 3
, 3...Sprocket body, 4...Wrist mechanism, 5...Welding torch, 6...Power supply body, 7...Bracket, 8... Guide block, 9... Power supply brush.

Claims (1)

[Scope of utility model registration request] A wrist mechanism 4 is constructed by disposing a pair of sprocket bodies 3 on both outer sides in a rotating case 2 having a rotating shaft 1 extending forward.
and a welding torch 5 on the front surface of the rotating shaft 1.
In this type, a guide block 8 is fixed to the rotary case 2 via a bracket 7 extending forward, and a power supply brush 9 is attached to the guide block 8, and the brush 9, a power supply device for a welding torch that is brought into contact with the circumferential surface of the power supply body 6;