JPS5856067Y2 - Power supply device for C type welding gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device for a so-called C-type welding gun in which a movable electrode on the piston rod side of the cylinder faces a fixed electrode on the yoke side attached to the cylinder.

Generally, power is supplied to the movable electrode in this type of gun using a flexible copper plate that is curved in a U-shape and inserted between the piston rod and the yoke.

For this reason, the distance between the piston rod and the yoke must be maintained to allow sufficient flexibility of the flexible copper plate, which inconveniently increases the size of the gun.

The present invention has been devised to improve the above disadvantages, and the object is to provide a power supply device that supplies power to a movable electrode using the sliding portion of the piston rod.

To explain this with respect to the illustrated embodiment, 1 represents a cylinder, and a yoke 2 is attached to the outer casing of the cylinder 1.
A movable electrode 4 faces the fixed electrode 3 provided on the cylinder 1.
It is provided at the tip of a piston rod 5 that slides inside, and is formed into a so-called C-type gun.

At the rear end of the yoke 2, there is provided a yoke-side cable attachment part 7 for attaching a cable 6 having two terminals 6a and 6b forming a Yin-Yang pair, and a rod-side cable attached opposite to the attachment part 7 is provided. The mounting portion 8 is connected via a conductor 9 to a feeder 10 into which the piston rod 5 is slidably inserted, and the sliding surface of the feeder 10 is provided with inclined blades as shown in FIG. A conductive ring 13 formed by a continuous conductive plate 12 is interposed, and power is supplied to the rod 5 through the ring 13.

Note that the conductive ring 13 may be provided on the inner circumferential surface of the bearing portion 14 of the cylinder 1 or the outer circumferential surface of the piston of the piston rod 5 instead of being provided on the feeder 10 described above. It is formed as a feeder to which one terminal of the cable 6 is connected.

Since the present invention is constructed as described above, power is supplied to the movable electrode 4 via the conductive ring 13 that is in contact with the sliding piston rod 5. A conductive ring 13 formed by a conductive plate 12 having continuous inclined blades is provided on the sliding part of the rod 5, and power is supplied to the movable electrode via the ring 13. Compared to the case where flexible copper plates are provided, the spacing between them can be narrowed enough to obtain a small welding gun, and the inclined vanes 11 of the conductive ring 13 always maintain a constant level with respect to the sliding movement of the piston rod. Since contact can be made with contact pressure, a large current can flow, and even when power is supplied using a cable that is not a pair of Yin and Yang, it has the effect that power can be supplied without causing the cable to slide.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway side view, Fig. 2 is a slope view of a conductive plate, 1... cylinder;
2... Yoke, 3... Fixed electrode, 4... Movable electrode, 5... Piston rod, 11... Vane, 12...
- Conductive plate, 13... conductive ring.

Claims (1)

[Scope of utility model registration request] In a C-type welding gun in which a movable electrode 4 on the piston rod 5 side of the cylinder 1 is opposed to a fixed electrode 3 on the yoke 2 side attached to the cylinder 1, an inclined blade 11 is continuous on the sliding part of the piston rod 5. A conductive ring 13 formed with a conductive plate 12 is provided, and the conductive ring 13
A power supply device for a C-type welding gun, characterized in that power is supplied to the movable electrode 4 via the movable electrode 4.