JP2000324734A - Rotating system electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation preventing mechanism of a rotating system electrical apparatus such as a generator, a motor, etc., which particularly can surely prevent a stator from rotation with a simple work and at reduced cost in material cost, etc. SOLUTION: In a rotating system electric apparatus such as a motor, etc., a stator is pressed against a frame to be fixed by pressure but it may be that the stator slips due to the counter-force of a rotary driving force. For that reason, by utilizing notches of stator plates which are used for positioning and phase alignment of the stator plates layered to compose the stator, nails 28 formed in the frame are bent and engaged with the notches to prevent the stator 12 from rotating relative to the frame in the rotation direction of the apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electrical device such as a motor, and more particularly to a rotating electrical device having a stator rotation preventing mechanism.

[0002]

2. Description of the Related Art A rotary electric device such as an electric motor or a generator includes a rotor connected to a rotating shaft and a stator attached to the outer peripheral surface of the rotor with a small gap. . The rotor and the stator are provided with windings, permanent magnets, and the like, and the rotor is driven to rotate in accordance with the exciting current supplied to the stator or the exciting current supplied to the rotor, or the electromotive force is externally applied. Take out.

[0003] In such a rotary electric device, the frame, which is the outer frame of the rotary electric device, and the stator are mounted as follows. FIG. 10 is a diagram illustrating a conventional frame and stator mounting configuration. As shown in FIG. 1, in the conventional mounting configuration, the stator 2 is mounted by, for example, press-fitting a frame 1 having an outer diameter Φ. That is, a stator 2 having an outer diameter Φ ″ which is the same as the inner diameter Φ ′ of the frame 1 or slightly larger than the inner diameter Φ ′ is inserted through one opening of the frame 1, and the inner peripheral surface of the frame 1 and the outer peripheral surface of the stator 2 are inserted. Is pressed in and fixed.

However, in the case of press-fixing as described above, the stator 2 may be displaced in the circumferential direction with respect to the frame 1. For example, since the reaction force of the rotational driving force generated by the motor is applied in the circumferential direction of the stator 2, the stator 2
Spins idle. For this reason, it is necessary to prevent the stator 2 from rotating. Therefore, the rotation of the stator 2 is conventionally stopped by the following method. (A) First, in the method shown in FIG. 11, after the stator 2 is press-fitted into the frame 1, a hole 3 reaching the stator 2 from the peripheral surface of the frame 1 is opened using a drill or the like, and a pin 4 is driven into the hole 3. It is. (B) On the other hand, in the method shown in FIG. 12, after the stator 2 is press-fitted into the frame 1, arc welding 6 is performed on the hole 5 formed in the frame 1. The fusion bonding is performed to stop the rotation of the stator 2. In this case, the holes 5 provided in the frame 1 are formed in advance, for example, at the stage of manufacturing the frame 1.

[0005]

The above-mentioned conventional rotation preventing mechanism has the following problems. First, in the method (a) shown in FIG. 11, it is necessary to perform a drilling process using a drill or the like and further perform a driving operation of the pins 4. Therefore, there is a problem in the number of work steps and the number of parts.

In the method (b) shown in FIG. 12 as well, it is necessary to perform the arc welding 6 on the hole 5, which requires a welding device, and the welding work is also difficult. The present invention
In order to solve the above-mentioned problems, an object of the present invention is to provide a rotation-stopping mechanism for a rotary-type electric device capable of reliably performing a rotation-stopping mechanism for a rotary-type electric device with a simple operation, and reducing welding equipment and the number of parts.

[0007]

According to an aspect of the present invention, there is provided a stator, a rotor provided with a predetermined gap on an inner periphery of the stator, and a pressure contact fixed to an outer periphery of the stator. In the rotating electrical apparatus having the frame, the stator uses a stator plate having a notch for phase matching formed in a part of the peripheral surface, and a plurality of stator plates are arranged by matching the positions of the notches for phase matching. Are formed by laminating the stator plates, and the frame is provided with claws corresponding to the positions of the notches for phase matching of the stator,
The claw provided on the frame is achieved by providing a rotary electric device that fits into a notch for phase adjustment formed on the stator.

Here, the stator is formed by laminating a plurality of stator plates, which are thin plates of a magnetic material such as a silicon steel plate. Each stator plate has a notch for phase matching, and the position of the notch for phase matching is determined. The stator plates are stacked on the basis of the reference. The frame is an outer frame that covers the stator, and the stator having the above configuration is pressed into the frame to fix the stator to the frame.

A claw is formed on the frame at a position corresponding to the notch for phase matching, and the claw is fitted into the notch for phase matching. The contact between the claw and the notch for phase matching prevents the electric motor or the like from rotating the stator in the same direction as the rotor rotates.

Therefore, according to the aspect of the present invention, the notch for adjusting the phase of the stator plate used when assembling the stator is used, and after the stator is assembled, the notch is formed by the notch for adjusting the phase. The configuration is such that the claws of the frame are fitted to form a rotation preventing mechanism for the stator.

According to a second aspect of the present invention, in the invention according to the first aspect, the pawl provided on the frame is formed by, for example, press-fitting the stator into the frame and then bending the pawl to fit the pawl for the phase adjustment. It is a configuration that fits into the notch.

In this embodiment, after the stator is press-fitted into the frame, the claws are bent toward the stator, and the claws are fitted into the notches for phase matching to prevent the stator from rotating. With such a configuration, the rotation stopping mechanism of the stator can be easily completed.

According to a third aspect of the present invention, in the second aspect, the claw has, for example, a U-shaped cut portion,
The U-shaped cut portion is bent into the notch for phase matching.

By configuring the pawls in this manner, the pawls can be easily fitted into the notches for phase matching, and a stator rotation preventing mechanism can be configured more easily. However, the shape of the cut portion is not limited to a U-shape, but may be a U-shape, a V-shape, a W-shape, or the like.
It can be formed into various shapes that can be bent, such as a letter shape.

According to a fourth aspect, in the third aspect, the U-shaped cut portion is formed, for example, in a direction of a rotation axis. This example specifies the direction in which the U-shaped notch is formed. With such a configuration, the U-shaped notch is folded into the notch for phase matching, and idle rotation generated with rotation of the stator is performed. To prevent In this case, idling of the stator is prevented by the contact of the side surface of the claw with the notch for phase matching.

According to a fifth aspect, in the third aspect, the U-shaped cut portion is formed, for example, in a rotation direction of the rotor. This example also specifies the direction in which the U-shaped notch is formed. In this example, the U-shaped notch is formed in the direction of rotation of the rotor.
Therefore, the U-shaped cut portion is folded into the notch for phase matching to prevent idling caused by the rotation of the stator. In this case, the idling of the stator is prevented by the contact between the tip of the pawl and the notching for phase matching. Is done.

Therefore, in this case, when stopping the idling of the stator, a rotational force is not applied from the side of the claw, but
Rotational force is applied from the tip of the claw, and the lower end of the claw abuts against the side surface of the stator, so that the stator can be more reliably prevented from idling.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment,
An example of an electric motor will be described as a rotating electric device.

FIG. 1 is a cross-sectional view of an electric motor according to the present embodiment, which is an example of an electric motor employing a rotation preventing mechanism for a stator. The electric motor 10 includes a rotor (rotor) 11 and a stator (stator) 12, and is covered with a frame 13 that covers the outer periphery of the stator 11 and left and right end brackets 14 and 15. The rotor 11 is fixed to a rotating shaft 16, and the rotation of the rotor 11 is output to the outside via the rotating shaft 16.

The rotating shaft 16 is mounted on end brackets 14 and 15 via bearings 18 and 19. A bearing holder 20 for mounting the bearing 18 to the end bracket 14 is provided on the bearing 18 side.

The stator 12 is formed by laminating a plurality of stator plates 22 made of, for example, a silicon steel plate, and has a predetermined length. Further, a winding 24 is wound around a slot to be described later on the stator 12, and a part of the winding 24 protrudes from a side surface of the stator 12, and the protruding portion is molded with resin or the like.

The outer peripheral surface of the stator 12 is
3 is press-fitted. Therefore, the stator 12 and the frame 13 are in pressure contact with each other, and this assembling method will be described later.

On the other hand, end brackets 14 and 15 are located on both sides of the stator 12,
Reference numerals 4 and 15 are attached to the above-mentioned frame 13 with screws 25. Here, the end brackets 14 and 15 are formed in a bottomed cylindrical shape.

Next, each component of the electric motor 10 having the above configuration will be specifically described. FIG. 2 shows the stator 12 described above.
FIG. 2 is a diagram showing an external configuration of the apparatus. As described above, the stator 1
Numeral 2 is formed by laminating a number of stator plates (silicon steel plates) 22, and windings 24 are wound around slots (described later) formed in the stator 12. A cutout 26 extending in the direction of the rotation axis is formed in a part of the outer peripheral surface of the stator 12. The notch 26 extends approximately half the length L / 2 of the entire length L of the stator 12 and has a predetermined depth.

FIG. 3 is a view for explaining a specific configuration of the stator plate 22 constituting the stator 12 described above. The stator plate 22 is made of, for example, a silicon steel plate having a thickness of 0.5 mm, and has a notch 27 for phase matching for forming the above-described notch 26 on the peripheral surface. The plurality of grooves formed on the inner peripheral surface of the stator plate 22
This is a slot 29 for installing the winding 24 described above.

The above-described stator 12 has a notch 2 for phase matching.
The stator plate 22 is sequentially laminated in the axial direction while adjusting the position of the stator 7, and rotated by 180 degrees at L / 2, and the stator 1 is rotated.
Create the second core. Thereafter, the windings 24 are disposed in the above-described slots 29 and assembled.

FIG. 4 shows the appearance of the frame 13 described above. The frame 13 is formed of a steel plate, and has a notch 26 (a notch 27 for phase matching) provided in the stator 12 described above.
Is formed at a position corresponding to. Claw 28 is U
A cut is made in the U-shaped portion 28a of the claw 28, and the dotted line 28b in FIG.
The character portion 28a is configured to be bent downward.

Next, the stator 1 constructed as described above will be described.
2, the electric motor 10 shown in FIG. 1 described above is created by using the frame 13, the rotor 11, and the like. First, the stator 12 assembled by laminating a large number of stator plates 22 is attached to the frame 13 based on the notch 27 for phase matching as described above. This attachment press-fits the stator 12 into the frame 13 as described above. In this case, first, as shown in FIG. 5, the claw 28 formed on the frame 13 is aligned with the notch 26 formed on the stator 12, and the stator 12 is press-fitted from the right side of the frame 13, for example.
The notch 26 is formed at the same time as the notch 27 for phase matching formed on the stator plate 22 as described above.

Next, the press-fitting of the stator 12 is performed as described above, and when the stator 12 reaches a predetermined position of the frame 13, the press-fitting operation is completed. FIG. 6 is a cross-sectional view after the stator 12 is press-fitted into the frame 13 and the press-fitting process is completed, and is a cross-sectional view mainly showing a fitting portion between the notch 26 and the claw 28 described above. When the press-fitting of the stator 12 is completed, the cut of the U-shaped portion 28a of the above-described claw 28 is bent downward, and the U-shaped portion 28a is fitted into the cutout 26 as shown in FIG.
At this time, the U-shaped portion 28a may be bent until the U-shaped portion 28a bites into the notch 26.

When the claw 28 is fitted into the notch 26 as described above, even if a reaction force is applied to the stator 12, the claw 28
The (U-shaped portion 28a) abuts against the side surface of the notch 26 to prevent the stator 12 from turning around.

Incidentally, the pressing force existing between the stator 12 and the frame 13 is sufficient for fixing the stator 12 in the axial direction. That is, the displacement force in the axial direction of the stator 12 is smaller than the above-described reaction force in the rotation direction, and can be sufficiently held by the above-described pressing force.

Next, the stator 12 is press-fitted as described above, and is mounted on the frame 13.
Attach end brackets 14 and 15 to (and frame 13). This mounting is performed with screws 25,
Finally, the rotor 16 fixed to the rotating shaft 16 is attached, and the assembly of the electric motor 10 is completed.

Next, after assembling the electric motor 10, for example, a three-phase alternating current is applied to the winding 24 to generate a rotating magnetic field, and
Is driven to rotate. In this case, the stator 12 also attempts to rotate in the same direction, but the side face of the claw 28 (U-shaped portion 28a) of the present example comes into contact with the notch 26, and the rotation of the stator 12 is prevented.

As described above, in the present embodiment, the stator 12
The notch 26 is provided on the outer periphery of the
8 (U-shaped portion 28 a) is pushed into the notch 26, for example, to be bitten to stop the rotation of the stator 12. In particular, the notch 26 of the present embodiment is used when assembling the stator 12 (stacking the stator plates 22). At this time, the notch 27 for phase adjustment used for phase adjustment (position alignment) of each stator plate 22 is inserted into the notch 2 for stopping rotation after assembly.
6 is used.

Therefore, when producing the stator 12,
For the purpose of merely positioning, for example, it is conceivable to use a stator plate 30 having a shape shown in FIG. 7, but it cannot be used to stop the stator 12. Can not. That is, in this case, the stator 12 (the stator plate 3
The notch 31 formed in 0) has a cross-sectional shape in which the claw 28 cannot be fitted, and can be used for phase matching, but cannot be applied to stop rotation of the stator 12.

As described above, by configuring the rotation stopping mechanism of the stator 12, the number of assembling steps of the rotation stopping mechanism of the stator 12 is reduced, and as a result, the assembling of the electric motor 10 is facilitated and the special pins are driven. Electric motor 1 without any processing or welding work and without the need for special equipment
0 can be assembled.

In the above description of the embodiment, the shape of the claw 28 is U-shaped. However, the shape is not limited to the U-shape, and may be other shapes such as a U-shape, a V-shape, or a W-shape. However, any configuration may be used as long as it can fit into the notch 26 by bending.

The claw 28 formed on the frame 13 is
It is good also as a structure provided with two or more. In this case, a corresponding number of notches 26 may be formed in the frame 13, and a plurality of claws 28 may be fitted one by one into the corresponding notches 26, or a plurality of claws 28 may be fitted into one notch 26. It may be.

In the above description of the embodiment, the claw 28 formed on the frame 13 has the U-shaped portion 28a formed in the direction of the rotation axis as shown in FIG. May be formed in the idle direction. In this case, the U-shaped portion 28a is formed such that the tip of the U-shaped portion 28a is in a direction to receive the rotational force (idling rotational force) of the stator 12. With this configuration, the stator 1
In the idle rotation of No. 2, the tip of the claw 28 (U-shaped portion 28a) is notched 26.
, And the idle rotation of the stator 12 is prevented. In this case, the claw 28 (U-shaped portion 28a)
A rotational force is applied from the tip of the notch, and the lower end of the claw 28 (U-shaped portion 28a) abuts against the bottom surface of the notch 26 formed in the stator 12, so that idling of the stator 12 can be more reliably prevented. In the embodiment, the attachment of the frame 13 and the end brackets 14 and 15 was performed with screws 25 as shown in FIG. However, as shown in FIG. 9, a configuration may be adopted in which the screws 25 'are tightened from the side and the frame 13 and the end brackets 14 (and 15) are attached. The configuration shown in FIG. 9 is more general.

Furthermore, the frame rotation preventing mechanism of the present invention can be applied to any of a direct current (DC) motor and an alternating current (AC) motor, and can also be applied to other rotary electric devices such as a generator and a phase shifter. can do.

[0041]

As described above, according to the present invention,
The notch for preventing idling can be formed using the notch for phase matching used in assembling the stator.

Further, there is no need to perform complicated operations such as drilling and pin driving after the press-fitting of the stator, so that the number of man-hours during assembly can be reduced. Further, the conventional welding equipment is not required, and the electric motor and the like can be produced with smaller equipment.

Further, since pins and welding materials are not used, the number of parts can be reduced, and the cost of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric motor employing a frame rotation preventing mechanism according to an embodiment.

FIG. 2 is a diagram showing an external configuration of a stator.

FIG. 3 is a diagram illustrating a configuration of a stator plate.

FIG. 4 is a diagram showing an external configuration of a frame.

FIG. 5 is a diagram showing a mounting configuration of a frame and a stator.

FIG. 6 is a sectional view after a stator is press-fitted into a frame.

FIG. 7 is a diagram showing an example of a stator plate that cannot be used in this example.

FIG. 8 is an external view of the frame when the forming direction of the claw (U-shaped portion) is adjusted to the rotation direction of the stator.

FIG. 9 is a modification of the present embodiment.

FIG. 10 is a diagram illustrating a conventional frame and stator mounting configuration.

FIG. 11 is a diagram illustrating a conventional configuration in which a frame and a stator are attached by pins.

FIG. 12 is a diagram illustrating a conventional configuration in which a frame and a stator are attached by welding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric motor 11 Rotor (rotor) 12 Stator (stator) 13 Frame 14, 15 End bracket 16 Rotating shaft 18, 19 Bearing 20 Bearing holder 22 Stator plate 23 Notch 24 Winding 25, 25 'Screw 26 Notch 27 Phase matching Notch 28 Claw 28a U-shaped part 28b Dotted line 29 Slot 30 Stator plate 31 Notch for phase matching

Claims (5)

[Claims] 1. A rotating electrical apparatus comprising: a stator; a rotor disposed with a predetermined gap on an inner periphery of the stator; and a frame fixedly pressed on an outer periphery of the stator. Using a stator plate having a notch for phase matching formed on a part of the peripheral surface, stacking a number of the stator plates so that the position of the notch for phase matching is matched, A claw provided corresponding to a position of the notch for phase adjustment of the stator; a claw provided on the frame is fitted into a notch for phase adjustment formed on the stator; . 2. The rotating mechanism according to claim 1, wherein the pawl provided on the frame presses the stator into the frame, bends the pawl, and fits the pawl into the notch for phase matching. Electrical equipment. 3. The claw has a U-shaped notch,
3. The rotary electric device according to claim 2, wherein the U-shaped cut portion is bent into the notch for phase matching. 4. The rotary electric device according to claim 3, wherein the U-shaped cut portion is formed in a direction of a rotation axis. 5. The U-shaped cut portion is formed in a direction of rotation of the rotor.
A rotating electrical device as described.