JPH05285660A - Wire feeder for torch welding - Google Patents

Abstract

PURPOSE:To reduce an interval between a motor and a head and to reduce the size of the wire feeder by fixing the motor and a head axis on the opposite side of the head. CONSTITUTION:There is a screw 4 at a left end of an output axis 3 of the hollow motor 1 and a boss part 7 of the head 6 provided with a roller 5 for feeding a wire is screwed thereon. A right end of the output axis 3 is then passed through the inside of the motor 1 toward a side wall 8 of the opposite side of the head 6 and the notched surface 10 for fixing the output axis is formed on a projecting part 9 to project outward from the side wall 8. The size of the wire feeder is reduced as compared with a conventional case where the notched surface for fixing the output axis is constituted between the motor 1 and the head 6 and the rotation of the motor can be stabilized by forming this constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torch welding wire feeder for feeding a welding wire by a roller.

[0002]

2. Description of the Related Art Conventionally, there is a torch welding wire feeder as shown in FIG. That is, 21 is a hollow motor, the output shaft 22 of the motor 21 penetrates through the center of the motor, and a screw 23 is formed at one end of the output shaft 22. A head 25 having a wire feeding roller 24 is screwed on. A through hole 26 for wire feeding is formed at the center of the output shaft 22 in the axial direction. In addition, 27 is a track as shown by a virtual line.
A connecting member for connecting the cable 28.

And, such a torch welding wire is used.
In the feeding device of FIG. 3, a wire 29 from a wire reel (not shown) passes through a through hole 26 formed in the output shaft 22 of the hollow motor 21 and is pulled and corrected by the roller 24. It passes through the roller 24 in the head 25, is sent from the connecting member 27 to the torch cable 28, and is used for torch welding.

By the way, in the above-mentioned torch welding wire feeder, the head 25 is screwed and assembled to one end of the output shaft 22 of the motor 21, so that the motor 21 and the head 25 are joined together. A cutout surface 30 for fixing the output shaft is formed on the output shaft between them, and the cutout surface 30 is held by a wrench or the like so that the output shaft 22 is fixed so as not to rotate, and the head 25 is rotated while rotating the head 25. Is assembled to the screw 22 of the output shaft 32 by screwing.

[0005]

[Problems to be Solved by the Invention]
1 and a cutout surface 3 for fixing the output shaft to the output shaft between the head 25
In order to form 0, the head 25 is arranged at a position distant from the motor 21 and the apparatus becomes large as a whole, and the inertial force due to the weight of the head 25 greatly affects the rotation of the motor. It makes the rotation of the influence motor unstable.
There is a problem.

The present invention has been made in view of the above problems of the prior art, and its object is to change the position of the cutout surface for fixing the output shaft to a motor. It is an object of the present invention to provide a torch welding wire feeder in which the distance between the head and the head is reduced, the wire feeder is downsized, and the rotation of the motor is stable.

[0007]

In order to achieve the above object, a feed device for a torch welding wire according to the present invention is a wire which is axially centered on an output shaft which penetrates a central portion of a hollow motor. -A feed device for a torch welding wire in which a feed through-hole is bored and a screw formed at one end of the output shaft is screwed with a head of a feed roller. The other end of the output shaft is projected from the side wall of the hollow motor, and a notch surface for fixing the output shaft is formed on the protruding portion.

[0008]

[Operation] Torch welding wire constructed as described above
Feed device, the wire is attached to one end of the motor output shaft.
When screwing and assembling the head of the feeding roller, the notch surface for fixing the output shaft formed on the protruding portion at the other end of the output shaft is held by a spanner etc. to prevent the output shaft from rotating. It is preferable that the head is screwed and assembled to the screw of the output shaft while rotating the head in a fixed state.

When the torch welding wire feeder is used, the protrusion serves as a guide for guiding the wire into the output shaft of the motor, and between the motor and the head. Since there is no cutout surface for fixing the output shaft, the interval can be shortened accordingly.

[0010]

Embodiment An embodiment of the present invention will be described with reference to FIG.
In FIG. 1, reference numeral 1 is a hollow mold installed in the box 2.
The output shaft 3 of the hollow motor 1 passes through the center of the motor. A screw 4 is formed at one end of the output shaft 3, and a boss portion 7 of a head 6 equipped with a wire feeding roller 5 is screwed onto the screw 4.

The other end of the output shaft 3 penetrates the inside of the motor 1 toward the side wall 8 opposite to the head 6 side, projects outward from the side wall 8, and outputs to the projecting portion 9. A notch surface 10 for fixing the shaft is formed, and a through hole 11 for wire feeding is formed at the center of the output shaft 3 in the axial direction. In addition, 12 is a torch cable 1 as shown by a virtual line.
3 is a connecting member for connecting the three.

In the torch welding wire feeder having the above structure, the wire reel (not shown) is used.
When the wire 14 from the ruler is fed into the box 2, first, the protrusion 9 is passed through the through hole 11 of the output shaft 3 in the hollow motor 1.
It passes through the roller 5 in the head 6, is straightened by being pulled by the roller 5, is straightened, is sent from the connecting member 12 to the torch cable 13, and is used for torch welding. is there.

When the head 6 of the wire feeding roller 5 is screwed and assembled to one end of the output shaft 3 of the motor 1, it is formed on the protruding portion 9 at the other end of the output shaft 3. The head 6 is screwed and assembled to the screw 4 of the output shaft 3 while rotating the head 6 while holding the notched surface 10 for fixing the output shaft with a wrench or the like and fixing the output shaft 3 so as not to rotate. To

As described above, since there is no cutout surface for fixing the output shaft between the motor 1 and the head 6, the space between them is shortened accordingly. Also, the protrusion 9 is a wire-1.
4 also serves as a guide for guiding the motor 4 into the output shaft 3 of the motor 1.

[0015]

Since the present invention is constructed as described above, there is no cutout surface for fixing the output shaft between the motor and the head, and the space between them is shortened accordingly. Therefore, the entire apparatus is downsized, and the inertial force due to the weight of the head is reduced, so that a very stable rotation of the motor can be obtained.

Further, since the protruding portion having the cutout surface for fixing the output shaft also serves as a wire feeding guide, it is possible to provide a torch welding wire feeding device capable of feeding the wire in a stable manner. Become.

[Brief description of drawings]

FIG. 1 is a side view of a torch welding wire feeder according to the present invention.

FIG. 2 is a side view of a conventional torch welding wire feeder.

[Explanation of symbols]

 1 Hollow Motor 3 Output Shaft 4 Screw 5 Roller 6 Head 8 Side Wall 9 Projection 10 Cutout Surface for Fixing Output Shaft 11 Through Hole 14 Wire-

Claims (1)

[Claims] 1. A wire feed through hole is formed in an output shaft passing through a central portion of a hollow motor at an axial center, and a screw formed at one end of the output shaft is used for wire feed. In a torch welding wire feeder having a roller head screwed thereto, the other end of the output shaft is projected from the side wall of the hollow motor, and the notch surface for fixing the output shaft is provided on the projection. The feed device for the torch welding wire, which is characterized in that