JPS5886845A - Husing machine - Google Patents

Abstract

PURPOSE:To remove defectives positively by pressure-welding commutator bars corresponding to the winding starting and winding ending sections of a coil by fusing pressing force smaller than other commutator bars. CONSTITUTION:A detector 24 for detcting the positions of the commutator bars of the winding starting section and winding ending section of the coil is mounted. A core lifter 20 is positioned at the central section of the fusing machine 18, two electrodes 21 are arranged while being opposed in the left and right direction, and the electrodes 21 are pressed by means of a cylinder 22. The commutator bars corresponding to the winding starting section and winding ending section of the coil are pressure-welded by fusing pressing force smaller than other commutator bars on the basis of detecting signals from the detector 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fusing machine that electrically and mechanically connects a commutator piece and a coil of a commutator of a motor rotor.

FIG. 1 shows a motor rotor 10 processed by a fusing machine, in which reference numeral 11 indicates a rotating shaft of the motor, 12 a commutator fixed on the rotating shaft 11, and 13
is also an iron core fixed on the rotating shaft 11, around which a coil 14 is wound, and one coil 14 is electrically connected to the commutator 12.

FIG. 2 shows a cross-sectional view of the commutator 12 shown in FIG.
A plurality of commutator pieces are arranged and fixed at equal intervals on the outer peripheral surface of the commutator 7, and a hook portion 16a is formed at the end on the iron core 13 side. Each time the enamelled wire constituting the coil 14 is wound around the iron core 13, it is hooked onto the hook portion 16a, one by one.In particular, the hook portion 16a, on which the winding start and end portions of the coil 14 are hung, is hooked onto the hook portion 16a. Two enameled wires are hooked up.

Normally, a motor rotor is subjected to fusing work to electrically and mechanically connect the coil 14 and the commutator pieces 16 after winding the coil 14 around the iron core 13. use The conventional fusing machine presses the tip of the hook part 16a from the outside of the circumference under the same fusing pressurizing conditions.
After further curving a, the tip portion of the hook portion 16a is electrically welded onto the outer periphery of the commutator piece 16, and at the same time, the heat generated at this time destroys the coating of the enameled wire and also welds the enameled wire to the hook portion 16a. Was.

Therefore, in the hook portion 16a of the commutator piece 16 on which the winding start portion and winding end portion of the coil 14 are hung, the two coils 14 hooked on the hook portion 16a are
There was a risk that excessive fusing pressure would be applied to the coil 14 and the coil 14 would be disconnected at that portion. Furthermore, if the fusing pressure is reduced in order to prevent the coil 14 from breaking, there will be insufficient pressure at the hook portion 16a where only one enameled wire is hung, and the covering of the enameled wire may be destroyed. There was a risk that defects such as electrical non-conductivity would occur.

Based on a detection signal from a detection device that detects the position of the commutator piece in the coil, the commutator pieces corresponding to the winding start and end parts of the coil are crimped with a smaller fusing pressure than other pieces. We are trying to provide a fusing machine that can provide an appropriate fusing pressure by welding, and can reliably eliminate defects such as disconnection of the coil or lack of electrical continuity between the commutator piece and the coil. It is something to do.

The embodiment of this disuse shown in FIGS. 3 to 5 will be described in detail below. In the description, parts that are the same as those in the prior art are designated by the same reference numerals.

That is, FIG. 3 shows a fusing machine 18 for the motor rotor 10, and 19 is a moving device for the fusing machine 18, which moves the motor rotor 10 after winding the coil 14. It can be fed sequentially from the left to the center, and after fusing is completed, it can be fed sequentially from the center to the right. A core lifter 20 is located in the center of the fusing machine 18 and is composed of a holding member 20a that rotatably holds the motor rotor 10 and an air cylinder 20b that moves the holding member 20a in the vertical direction. Therefore, the holding member 20a is movable between an original position shown by a solid line in FIG. 4, an intermediate stop position shown by a chain line, and a working position for fusing the motor rotor 10. 21 are arranged opposite to each other in the left and right direction.
The electrodes are pressurized by cylinders 22 on their sides. 23 is a control panel. Also, 24 is the coil 1
This is a detection device for detecting the position of the commutator piece 16 at the winding start portion and winding end portion of No. 4, and is attached to the fusing machine 18 so as to be movable in the left-right direction in FIG.

25 is a hollow rotating shaft that constitutes the detection device 24;
It has a gear at one end and is rotatably supported on the frame 26. 27 is a motor for rotationally driving the hollow rotating shaft 25; 28 is a rotating shaft supported within the hollow rotating shaft 25 so as to be movable in the left-right direction in FIG. 5; rotates with 25,
The movable range of the rotary shaft 28 is determined by the key 29 and the elongated groove 30 provided in the rotary shaft 28.

Reference numeral 31 designates a part of the sensor installed at the tip of the rotary ring 28, and claw portions 31a are formed to protrude and face each other. As shown in FIG. 5, the claw portions 31a are formed so as to be fit into two recesses 32 formed on the side surface of the resin portion 17 of the commutator 12, which is not on the iron core 13 side. Moreover, the recess 32
are formed corresponding to the winding start part and the winding end part of the coil 14, and therefore, by fitting the claw part 31a into the recess 32, the winding start part and the winding end part of the coil 14 of the commutator piece 16 can be adjusted. can be detected. A spring 33 is located between the hollow rotating ring 25 and the sensor part 3'1, and urges the sensor part 31 toward the commutator 12 side. 34 is a stopper installed on the rotating shaft 28; 35
is a limit switch I arranged at the rear of the rotating shaft 28.

In the device configured as described above, the fusing process will be explained. First, the motor rotor 10, on which the coil 14 is wound by the winding machine, is moved by the moving device 19.
The core lifter 20 then lifts the core lifter 20 to an intermediate stop position. After that, the detection device 24 moves forward toward the motor rotor 10 side. Then, the claw part 31a of the sensor part 31 hits the resin part 17 of the commutator 12, and the detection device 24 except the sensor part 31 (rotary shaft 28) moves further forward, but the sensor part 31 (rotary shaft 28) It stops in place while compressing the spring 33. Then, when the rotating shaft 28 closes the limit switch 35, the movement of the detection device @24 is stopped.

Next, when the limit switch 35 is turned on, the motor 27 rotates, thereby rotating the hollow rotating shaft 25 and the rotating ring 28 (sensor part 31). As the sensor portion 31 rotates, the claw portion 31a fits into the recess 32 of the commutator 12 by the elastic action of the spring 33, and the commutator piece 16 on which the winding start and end portions of the coil 14 are hung. When detected, the rotating shaft 28 slides toward the commutator 12 and opens the limit switch 35. When the limit switch 35 is opened, the motor 27 rotates the rotating shaft 28 together with the motor rotor 10 to a predetermined position and stops. That is, the commutator 12 is rotated by the rotating shaft 28 via the sensor part 31 on the rain retaining member 20a, and the commutator pieces 16 at the winding start and end of the coil 14 are in a horizontal state. Time stops. Then, the detection device 24 is retracted and the motor rotor 10 is further lifted by the core lifter 20 to the working position.

First, for the winding start part and the winding end part of the coil 14, and for the hook part 16a of the commutator piece 16,
The left and right electrodes 21 are simultaneously pressed by the cylinder 22, and as shown in FIG. , the coating is broken on the enameled wire and the enameled wire is also welded to the hook portion 16a. After that, the motor rotor 10 is connected to the commutator piece 16
are rotated one by one on the holding member 2Oa, and the enameled wires are welded one by one with an appropriate fusing pressure greater than or equal to the fusing pressure described above, and the enameled wire is also attached to the hook part 1.
6a is well welded. When the fusing is completed, the motor rotor 10 is lowered to the moving device 19 by the core lifter 20, and is sequentially conveyed by the moving device 19.

As described above, the present invention includes a detection device that detects the position of the commutator piece at the winding start portion and winding end portion of the coil,
Based on the detection signal from the detection device, the commutator pieces corresponding to the winding start and winding ends of the coil can be crimped and welded with a smaller fusing pressure than other pieces. This prevents the coil from breaking or becoming electrically insulated between the coil and the commutator pieces, thereby significantly reducing the defect rate in the commutator fusing process.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the motor rotor, Fig. 2 is a cross-sectional view of the main part of the commutator, Fig. 3 is a front view of the fusing machine adopting this invention, and Fig. 4 is an enlarged side view of the main part. Figure, 5th
The figure is an enlarged sectional view of the main part of Fig. 4, and Fig. 6 is a sectional view of the main part after crimping and welding of the commutator piece part where two coils are hung.
FIG. 7 is a cross-sectional view of the main part of the commutator piece on which one coil is attached after pressure welding. Explanation of symbols 10 is the motor rotor, 12 is the commutator, 1
4 is a coil, 16 is a commutator piece, 16a is a hook portion, 18
2 is a using machine, and 24 is a detection device. Patent applicant Figure 1 Figure 3 Figure 4 Figure 2 Mu @ Figure 5 JQ

Claims (1)

[Claims] In a fusing machine that sequentially pressure-welds a plurality of commutator pieces constituting the commutator of a motor rotor and a coil hooked on the hook portion of each commutator piece, the coil winding start point and winding A detection device is provided for detecting the orientation of the commutator piece at the end, and based on a detection signal from the detection device, the commutator pieces corresponding to the winding start portion and the winding end portion of the coil are compared with other ones. This fusing machine is characterized by crimp welding with a small fusing force.