JP2585494Y2 - Rotating electric machine rotor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a rotating electric machine in which a plurality of magnets are circumferentially fixed to a rotating shaft.

[0002]

2. Description of the Related Art There is a rotary electric machine rotor in which a plurality of magnets are circumferentially fixed on a peripheral surface of a rotating shaft. FIG. 3 shows an example of such a conventional rotary electric machine rotor.
An intermediate portion in the length direction is a large diameter portion 13, and a plurality of magnets 12 are bonded and fixed to the outer peripheral surface of the large diameter portion 13. Each magnet 12 has a C-shaped cross section, is fixed circumferentially along the outer peripheral surface of the rotor 13, and its outer periphery is covered and fixed with an adhesive impregnated tape 14.

If it is necessary to adjust the balance in such a rotor, balancers 16 are attached to both ends of the large diameter portion 13 as balance weights as shown in FIG. The balance can be adjusted by making a hole in the hole 16 with a drill or the like.

[0004]

According to the conventional rotary electric machine rotor, the balancer plate 16 may come off and fly due to the centrifugal force generated when the rotor rotates. In addition to the above adhesive, a reinforcing adhesive must be used in combination. Further, since the balance adjustment is performed by forming a hole in the balancer plate 16 with a drill, the workability is poor and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to prevent the balance weight from scattering at low cost and to provide a rotating electric machine capable of easily adjusting the balance. It is intended to provide a rotor.

[0006]

The present invention in order to achieve the above object, there is provided a means for solving], in a rotor in which a plurality of magnets are fixed circumferentially on the outer periphery of the rotating shaft, to cover the magnet
It has a tape or resin for securing a more magnets, the Te
Tape or resin is an opening with an open end in the axial direction.
The tape or resin is formed so that the axial end
Parts form a flange projecting in the axial direction than the magnet, the flange is bent in the axial side tapered, balance
The weights are placed at the openings at both ends in the axial direction.
It is characterized in that it is fixed and held to the flange and the rotor end face .

[0007]

If the end of the tape or the resin in the axial direction is projected in the axial direction to form a flange, and if the balance weight is fixed to the inside of the flange and to the end face of the rotor, the balance weight is covered by the flange. There is no scattering due to the centrifugal force of the rotor rotation. Adhesion for reinforcing the balance weight is unnecessary, and there is no need to newly provide a component for balance adjustment.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rotary electric machine according to an embodiment of the present invention; 1 and 2
In the middle part of the rotating shaft 1 in the longitudinal direction, the large-diameter portion 3
Are formed. The large-diameter portion 3 is a columnar portion integral with the rotating shaft, and a plurality of magnets 2 are circumferentially mounted on the outer peripheral surface of the large-diameter portion 3. The magnet 2 has a C-shaped cross section and is fixed to the peripheral surface of the large diameter portion 3 using an adhesive. The magnet 2 attached to the peripheral surface of the large-diameter portion 3 is covered with a tape 4 impregnated with an adhesive and fixed.

The tape 4 has an axial dimension longer than the axial dimension of the large-diameter portion 3, and a portion protruding from both ends of the tape 4 beyond both axial ends of the large-diameter portion 3 becomes a brim portion 5. The flange portion 5 is bent in a tapered shape toward the end face of the large diameter portion 3.

A balance weight 6 having an appropriate weight is mounted inside the flange 5 to adjust the balance of the rotor. The balance weight 6 is fixed at two places, the end face of the large diameter part 3 and the flange part 5, so that the holding weight is strong, and the balance weight 6 is covered with the flange part 5 formed by bending the tape 4 toward the end face side of the large diameter part 3. Therefore, the rotor does not fly due to centrifugal force or the like when rotating.

As described above, a plurality of magnets 2 are provided on the outer circumference of the large-diameter portion 3 of the rotary shaft 1 in a circumferential shape, and the outer circumference of each of the magnets 2 is covered with the tape 4 impregnated with an adhesive. The taper 4 is formed from the tape 4 projecting from both ends in the axial direction of the large-diameter portion 3 and the collar 5 is bent in a tapered shape, and a balance weight is mounted in the collar 5 to achieve balance. Therefore, it is not necessary to add an extra configuration such as reinforcing bonding to the rotor. Further, since the balance weight 6 is simply mounted in the collar 5, the balance can be easily adjusted, and the balance weight 6 can be prevented from being scattered by the collar 5.

In the embodiment described above, the large-diameter portion 3
Although a tape impregnated with an adhesive was used as a member covering the outer peripheral surface of the above, the present invention is not limited to this. For example, a resin or the like may be used instead of the tape 4. The effect is the same.

[0013]

According to the present invention, in a rotor in which a plurality of magnets are fixed circumferentially on the outer periphery of a rotating shaft, the above magnets are used.
Have tape or resin to fix the magnet by covering
Then, this tape or resin has an open end in the axial direction .
The tape or resin is formed so as to be an opening.
The axial end of the shaft protrudes in the axial direction beyond the magnet to form a flange, and the flange is tapered toward the shaft.
The balance weights are placed at the openings at both ends in the axial direction.
In this case , the balance weight is fixed and held to the rotor end face, so that the balance weight can be prevented from coming off the rotor and scattered, and the reinforcing adhesive for reinforcing the balance weight can be used. Since it becomes unnecessary, the manufacturing cost of the rotor of the rotating electric machine can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a rotor of a rotating electric machine according to the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a sectional view showing an example of a rotor of a conventional rotating electric machine.

FIG. 4 is a sectional view showing an example in which a balance weight is attached to the rotor of the rotary electric machine;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary shaft 2 Magnet 3 Large diameter part 4 Tape 5 Brim part 6 Balance weight

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotor in which a plurality of magnets are circumferentially fixed on the outer periphery of a rotating shaft, the rotor having a tape or a resin for fixing the magnets by covering the magnets.
Or the resin should be an opening with an open end in the axial direction.
Are formed in the axial end of the tape or resin protrudes in the axial direction than the magnetic <br/> stone to form a flange portion, the flange portion
It is bent in a tapered shape on the shaft side,
Are connected to the collar at the openings at both ends in the axial direction.
A rotor of a rotating electric machine fixed and held to a rotor end face .