JPH11164530A - Structure of end part of rotor coil and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate forming work and length-adjusting and cutting work of an end turn for improvement of efficiency of assembling work, by forming fitting contact surfaces on the fitting portion of a rotor coil end turn of a final arcuate shape to be assembled on to a rotor and the fitting surface of the rotor coil end turn to be connected. SOLUTION: A rotor coil end part is bent to a final arcuate shape when assembled in the stage of manufacturing the coil. Then, it is cut to the length of a rotor coil end turn 4 before assembling so that fitting portions 5a and 6a of a rotor coil end turn 4 can be matched in the assembled state. Also, the fitting portions 5a, 6a, of the rotor coil turn 4 has an easy-to-connect structure for connecting the fitting surfaces. This structure enables the fitting portions 5a, 6a to be matched easily and connected simply, by inserting a rotor coil into the slot of a rotor shaft coil. Thus, it is possible to cut the usual forming work of the rotor coil end turn 4 and the cutting work for adjusting the fitting portion length, thereby improving the efficiency of the assembling work of the rotor coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotor coil end structure and a method of manufacturing the same.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional method of assembling a split rotor coil involves firstly shaping a rotor coil end turn 4 before assembly with a wooden hammer or the like (not shown).
To the shape of the outer circumference of. After shaping, the joints 5 and 6 of the rotor coil end turns 4 before assembly are cut so that the joints of the rotor coil end turns 4 before assembly match. Next, the shaping jig 2 for the rotor coil end turn 3 is mounted on the outer periphery of the rotor shaft 1 and the rotor coil end turn 3 is assembled on the outer periphery to produce a rotor coil.

[0003]

However, in the above-described conventional method of assembling the rotor coil, the rotor coil end turn 4 before assembly is hit with a wooden hammer or the like to conform to the outer shape of the shaping jig 2. After shaping in this manner, it was necessary to cut the rotor coil end turn 4 before assembly so that the seam 5 and seam 6 coincided with each other to obtain a rotor coil end turn 3 having an appropriate length. There was a problem that the workability of shaping the previous rotor coil end turn 4 and cutting work for cutting the rotor coil end turn 4 to an appropriate length was poor, and time was required.

The present invention (corresponding to claims 1 to 4) provides:
The purpose of the present invention is to solve the above-mentioned problem of the prior art. The purpose is to form the end of the rotor coil of the rotating electric machine by bending to form and lengthen the split rotor coil end turn in the assembling process. An object of the present invention is to provide a rotary electric machine rotor coil end structure and a method for manufacturing the same, which can omit the adjustment.

[0005]

In order to achieve the above object, the rotor coil end structure according to the first aspect of the present invention has a final arc shape in a state where the rotor coil is assembled to the rotor when a single product is manufactured. The joint surface of the rotor coil end turn connected to the joint of the final arc-shaped rotor coil end turn is a butt joint surface.

According to a second aspect of the present invention, there is provided a method for manufacturing an end portion of a rotor coil, which has a final arc shape in an assembled state to a rotor after bending the end portion of the rotor coil at the time of manufacturing a single rotor coil. In this manner, the joint of the rotor coil end turns is machined into a butt joint surface.

According to a third aspect of the present invention, there is provided a rotor coil end structure which is connected to a joint of a final arc-shaped rotor coil end turn in an assembled state to a rotor when a single rotor coil is manufactured. The joint of the end turns is a stepped joint surface.

According to a fourth aspect of the present invention, there is provided a method of manufacturing an end portion of a rotor coil, wherein the bending of the end portion of the rotor coil is performed before bending the rotor coil at the time of manufacturing the single rotor coil by taking into account the elongation due to the bending process. The joint of the rotor coil end turns is machined into a stepped joint surface so as to have a final arc shape in an assembled state.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a first embodiment (corresponding to claims 1 and 2) of the present invention. As shown in the figure, the rotor coil end of the rotary electric machine of the present embodiment includes a coil end straight portion 8, a coil end corner 7, and a rotor coil end turn 4. The rotor coil end is bent into a final arc shape at the time of assembling at the coil manufacturing stage, and then rotated before assembly so that the seam 5a of the rotor coil end turn 4 and the seam 6a coincide in the assembled state. The child coil end turn 4 is cut to the length. In addition, the joints 5a and 6a of the rotor coil end turn 4 have a butted surface joining structure in which joining is easy.

Next, the operation of this embodiment will be described.
Since the end turn 4 before assembling the rotor coil is formed so as to have a final arc shape and an appropriate length at the time of assembling, the end turn 4 is inserted only by inserting the rotor coil into a rotor shaft coil slot (not shown). 5a and 6a can be easily matched and joined. Accordingly, the conventional shaping operation of the rotor coil end turn 4 and the cutting operation for adjusting the length of the joint can be omitted, so that the efficiency of the rotor coil assembling operation is improved.

FIG. 2 is a perspective view of a second embodiment (corresponding to claims 3 and 4) of the present invention. As shown in the figure, the rotor coil end of the rotary electric machine of the present embodiment includes a coil end straight portion 8, a coil end corner 7, and a rotor coil end turn 4. At the time of assembling at the coil manufacturing stage, this rotor coil end is bent into the final arc shape,
Joint 5b and Joint 6b of rotor coil end turn 4
Are cut to the length of the rotor coil end turn 4 before assembly so that they match in the assembled state. Also, the joint 5b and the joint 6b of the rotor coil end turn 4 have a stepped structure that is easy to join, and the end of the rotor coil is adjusted so that the joint 5b and the joint 6b coincide in the assembled state. Considering the elongation of corner 7 due to bending, joint 5 before bending
b and the joint 6b are processed into a stepped structure.

Next, the operation of this embodiment will be described.
Since the end turn 4 before the assembly of the rotor coil has a final arc shape and an appropriate length at the time of assembly, the end turn 4 is combined with the joint 5b only by inserting the rotor coil into a rotor shaft coil slot (not shown). The eyes 6a can be easily matched and joined. Therefore, the shaping work of the end turn 4 and the cutting work for adjusting the length of the seam 5b and the seam 6b as in the related art can be omitted, so that the efficiency of the assembly work of the rotor coil is improved.

[0013]

As described above, the present invention (Claim 1)
According to claim 4), in the rotor coil manufacturing stage, the end turn is machined so as to have a final arc shape and an appropriate length at the time of assembly at the time of assembly, so that the joint portion of the end portion of the rotor coil is joined. Has a structure that can be easily joined.
Therefore, in the assembled state where the rotor coil is inserted into the rotor shaft coil slot, the conventional end-turn shaping operation and length adjustment cutting operation can be omitted,
Since the joints at the ends of the rotor coil can be easily matched and joined, the efficiency of the assembly work of the rotor coil is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotor coil end according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a rotor coil end according to a second embodiment of the present invention.

FIG. 3 is an essential part cross-sectional view showing a conventional method of assembling a rotor coil end of a rotating electric machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotor shaft, 2 ... Shaping jig, 3 ... Rotor coil end turn after assembling, 4 ... Rotor coil end turn before assembling, 5, 5a, 5b, 6, 6a, 6b ... Rotor coil end Turn joint, 7: rotor coil end corner, 8: rotor coil end straight section.

Claims (4)

[Claims] When a rotor coil is manufactured separately, the rotor coil is formed into a final arc shape in an assembled state to a rotor, and a mating surface of the rotor coil end turn connected to a joint of the rotor coil end turn of the final arc shape is abutted. A rotor coil end structure having a mating joint surface. 2. After bending the end portion of the rotor coil when the rotor coil is manufactured separately, the joint of the rotor coil end turns is joined so as to have a final arc shape in an assembled state to the rotor. A method of manufacturing an end portion of a rotor coil, wherein the end portion is processed. 3. The joint of the rotor coil end turn connected to the joint of the rotor arc end turn having the final arc shape in the assembled state to the rotor when the rotor coil is manufactured separately is a stepped joint surface. A rotor coil end structure. 4. A rotor coil end turn having a final arc shape in an assembled state to a rotor in consideration of elongation due to bending before bending a rotor coil end portion at the time of manufacturing a single rotor coil. A method of manufacturing an end portion of a rotor coil, characterized in that a joint of (i) is processed into a stepped joint surface.