Electric heating – Metal heating – By arc
Patent
1992-09-23
1994-07-05
Shaw, Clifford C.
Electric heating
Metal heating
By arc
B23K 9133
Patent
active
053269586
DESCRIPTION:
BRIEF SUMMARY
The invention is aimed at a drive device for so-called push-pull welding torches having continuously consumable wire electrodes.
So-called push-pull welding torches, i.e. electric welding torches having a continuously consumable wire electrode, in which the wire electrode is driven and pulled, are known in principle.
U.S. Pat. No. 2,719,245 discloses a feeding device for feeding welding wire to welding torches, in which feeding device the handle of the welding gun extends perpendicularly to the feed direction of the welding wire. Arranged laterally next to the handle is the drive unit consisting of drive motor, gearing and wire drive roller, the motor shaft of the drive motor being arranged at right angles to the wire feed axis.
Described in U.S. Pat. No. 3,210,522 is a welding gun in whose handle the drive motor of the welding-wire feed unit is arranged. The handle is arranged at right angles to the wire feed axis, and the gearing and the wire drive roller are arranged above the handle in a housing. CH-A-462 344 discloses a welding torch wherein the handle is coaxial with the wire feed axis and the wire electrode is passed through the handle. The drive motor is positioned with in the area of the handle enclosed by the hand resulting in a thick handle difficult to grasp.
However, the disadvantage of the push-pull torches on the market is that they have an unfavorable distribution of weight and often large-sized handles which are difficult to grasp.
The object of the present invention is to provide a structural design for a drive device for continuously consumable wire electrodes of electric welding torches whose handle is designed to be small and easy to grasp and in which the drive unit is arranged with a well-balanced distribution of weight in a housing part connected to the handle.
This object is achieved by a drive device for continuously consumable wire electrodes of electric welding torches, comprising a housing having a handle and a housing part arranged outside the area of the handle enclosed by the hand and having a drive unit arranged therein consisting of a wire drive roller and a drive motor arranged outside the wire feed axis acting on the wire drive roller via gearing and the motor shaft of the drive motor running in a horizontal plane which is at a distance from the parallel horizontal plane in which the wire feed axis runs when the welding torch is in a horizontal position, characterized in that the handle is designed to be coaxial to the wire feed axis, and the wire electrode is passed through the handle and the housing part, the housing part for accommodating the drive unit for the wire electrode is formed on the front side or rear side of the handle and the drive motor is arranged in such way that its motor shaft runs at right angles to the wire feed axis whereby a perpendicular plane running longitudinally through the wire feed axis intersects the motor shaft of the drive motor in the area of its armature.
The handle is arranged coaxially to the wire feed axis. When the welding torch is in a horizontal position, the wire feed axis runs in a horizontal plane. Handle and housing part for the drive unit are arranged relative to one another in such a way that the wire is not deflected in the housing of the drive device. When the welding torch is in the horizontal position, the shaft of the drive motor runs in a horizontal plane which is at a distance from the parallel plane in which the wire feed axis runs, and the plane in which the motor shaft runs can be arranged below or above the horizontal plane in which the wire feed axis runs.
In one embodiment, the housing part for accommodating the drive unit is arranged on the front side or end face of the handle. In this case, the group of hoses is attached to the rear end of the handle, and not only the wire electrode but also the supply lines are passed through the handle of the housing part having the drive unit into the torch neck inserted into the end face of the housing part of the drive unit.
In another embodiment, the torch neck is direc
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patent: 2606267 (1952-08-01), McElrath, Jr.
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patent: 3811611 (1974-05-01), Tholander et al.
patent: 4179056 (1979-12-01), Schmerling
patent: 4703156 (1987-10-01), Hayes
patent: 4954690 (1990-09-01), Kensrue
Alexander Binzel GmbH & Co. KG
Shaw Clifford C.
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