JPH07163099A - Method for fixing rotor component of rotating electric machine - Google Patents

Abstract

PURPOSE:To unite a laminated iron core and components into one body easily by forming recessions on the rear sides of protrusions formed between the outer and inner peripheries of the laminated iron core leaving space for joining parts, engaging the protrusions and the recessions lightly, inserting rotor components into the inner and outer peripheries of the laminated iron core, and applying pressure to the laminated iron core in the axial direction. CONSTITUTION:Before a thin steel sheet 2 for constituting a rotor core 1 is punched into a ringlike shape, joining parts 21 are formed between a hole for inserting a rotary shaft 4 into and the inside diameter of magnets 5. At the same time, protrusions 21 are formed on the front surface side of the steel sheet 2, and recessions 23 on its rear side with a die. After a rotary shaft 4 is positioned, a specified number of steel sheets 2 are laminated engaging the protrusions 22 and the recessions 23 lightly, and magnets 5 are fitted to its periphery. Following this, axial-direction pressure application is performed with a pressure applying jig 6, and the laminated iron core is swollen in the outside and inside directions of the diameter, and the magnets 5 and the rotary shaft 4 are united into a body. Consequently, it becomes possible to simplify a press die and to curtail the assembly manday.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing rotor parts such as a rotary shaft and a magnet to a rotor core of a rotary electric machine.

[0002]

2. Description of the Related Art Conventionally, when fixing rotor parts such as a rotary shaft and a magnet to a rotor core, the rotary shaft is fixed by press fitting or shrink fitting in a fitting hole provided at the center of the rotor core. An adhesive is applied to the surface of the magnet and fixed to the outer circumference of the rotor core by adhesion. Also, when the rotor core is composed of a plurality of laminated cores, in order to couple the adjacent laminated cores in the vicinity of the outer periphery of the rotor core, a protrusion protruding in the axial direction of one of the laminated cores is provided and adjacent to each other. There is one in which the protrusion of one of the laminated cores is press-fitted into the recess formed in the back of the protrusion of the other laminated core. In this case, by pressing the protrusion into the recess, the outer periphery of the rotor core near the recess is bulged. Utilizing this phenomenon, after fitting a ring-shaped rotor part such as a magnet through a slight gap on the outer circumference of the rotor core, a protrusion is press-fitted into the recess to keep the space between adjacent laminated cores. There is one in which the bulging portion on the outer periphery of the rotor iron core is pressed against the rotor component while being combined with each other to fix the rotor iron core and the rotor component fitted to the outer periphery thereof (for example, actual open flat 1-9438).

[0003]

However, in the prior art of fixing the rotor parts to the rotor core by adhesion, curing heating is required to obtain the adhesive force of the adhesive, and a heating device is required, and It has a drawback that it requires a curing time, and it takes a lot of cost and processing time. Also,
When fixing the rotor component to the rotor core by shrink fitting, the heating device and heating / cooling time are also required, which is disadvantageous in that much cost and processing time are required. Further, in the case where a protrusion is formed in the vicinity of the outer periphery of the rotor core to join the adjacent laminated cores, the ring-shaped rotor part fitted to the outer periphery of the rotor core can be fixed, but the inner part of the rotor cannot be fixed. Cannot fix the axis of rotation. for that reason,
It is necessary to provide another protrusion around the fitting hole into which the rotary shaft is fitted, which causes a problem that the press die for processing the protrusion is complicated and expensive. It is an object of the present invention to provide a rotor component fixing method for a rotary electric machine, which has a simple press die for processing the protrusion and can reduce the number of processing steps.

[0004]

In order to solve the above problems, the present invention provides a rotor core by laminating a plurality of ring-shaped laminated cores, and the rotor is provided on the inner circumference and outer circumference of the rotor core. In a rotor component fixing method of a rotary electric machine for fixing components, a protrusion is formed by leaving a connecting portion between the outer periphery and the inner periphery of the laminated iron core, and a concave portion is formed on the back side of the protrusion, the laminated iron core. By lightly fitting the protrusions of the above into the recesses of the adjacent laminated cores, inserting the rotor parts in the state in which there is a gap in the inner circumference and the outer circumference of the laminated cores respectively, and by pressing the laminated cores in the axial direction, The protrusions of the laminated core are press-fitted into the recesses of the adjacent laminated cores, the joints are bulged in the radial direction, and the laminated core and the rotor parts inserted in the inner and outer circumferences of the laminated core are integrated. It is fixed to.

[0005]

With the above means, the protrusions and the recesses of the laminated cores adjacent to each other are lightly fitted, and the rotor parts such as the rotating shaft and the magnet are inserted into the inner circumference and the outer circumference, respectively, and the laminated cores are axially moved. Pressurize. As a result, the protrusions of the laminated core are press-fitted into the recesses of the adjacent laminated cores, the joints are pressed and bulge in the radial direction, and the outer and inner joints of the laminated cores are pressed against the rotor parts respectively. hand,
The laminated core and the inner peripheral side and the rotor parts fixed to the inner peripheral side are simultaneously fixed together.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of the present invention, showing a processing state. In the figure, a rotor core 1 is constructed by laminating a plurality of laminated cores 2 obtained by punching thin steel plates into a ring shape. The laminated core 2 has an outer circumference D as shown in FIG.
Between the inner periphery d and the inner periphery d, leaving a slight joint 21
And a recess 23 is formed on the back side of the protrusion 22. When stacking a plurality of laminated cores 2 while bonding them to each other, the protrusions 22 of the laminated cores 2 are lightly fitted beforehand to the recesses 23 of the adjacent laminated cores 2. First, Fig. 1
As shown in FIGS. 2A and 2A, the rotary shaft 4 is mounted in the positioning hole 31 of the positioning jig 3, and then the plurality of laminated iron cores 2 are inserted into the rotary shaft 4 with a gap. Next, the ring-shaped magnet 5 is fitted to the outer circumference of the laminated iron core 2 with a gap. Next, as shown in FIGS. 1B and 1B, a ring-shaped recess 61 that allows the protrusion 22 of the laminated iron core 2 to escape.
A pressing jig 6 having the above is placed on the laminated iron core 2 and pressed by a press in the axial direction. Then, the protrusions 22 are press-fitted into the recesses 23 of the adjacent laminated iron cores 2, the joint portions 21 are pressed, and the protrusions 22 are radially bulged to form the bulged portions 24,
The bulging portion 24 causes the connecting portion 21 on the outer peripheral side of the laminated iron core 2 to press the magnet 5, and the connecting portion 21 on the inner peripheral side is formed.
Presses the rotary shaft 4 to simultaneously fix the laminated iron core 2, the rotary shaft and the magnet 5 integrally.

[0007]

As described above, according to the present invention, a protrusion having a simple shape is provided on a laminated core, and a simple pressing jig and a press are used to join the laminated cores and at the same time Since the rotating shaft inserted in the inner circumference and the magnet inserted in the outer circumference can be fixed to the laminated iron core, the press die becomes simple,
This has the effect of reducing the man-hours for assembling the rotor parts.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, (a) shows a state before pressurization, and (b) shows a state after pressurization.

FIG. 2 is a plan view of FIG. 1, where (a) shows a state before pressurization and (b) shows a state after pressurization.

3A is a plan view showing a laminated core of an embodiment of the present invention, and FIG. 3B is a side sectional view thereof.

[Explanation of symbols]

1 rotor core, 2 laminated core, 21 joint part, 22
Projection portion, 23 concave portion, 24 bulging portion, 3 positioning jig, 31 positioning hole, 4 rotating shaft, 5 magnet,
6 Pressure jig

Claims (1)

[Claims] 1. A rotor component fixing method for a rotating electric machine, comprising: forming a rotor core by laminating a plurality of ring-shaped laminated cores; and fixing rotor components to an inner circumference and an outer circumference of the rotor core. A protrusion is formed by leaving a connecting portion between the outer circumference and the inner circumference of the laminated core, a recess is formed on the back side of the protrusion, and the protrusion of the laminated core is lightly fitted into the recess of the adjacent laminated core. , The rotor core is inserted with a gap between the inner and outer circumferences of the laminated core, and the protrusions of the laminated core are pressed into the recesses of the adjacent laminated cores by axially pressing the laminated core. Then, the joint portion is bulged in the radial direction to integrally fix the laminated core and the rotor component inserted into the inner circumference and the outer circumference of the laminated core, thereby fixing the rotor component of the rotating electric machine. Method.