JPH1141864A - Rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the air gap in assembly or attaching condition of a rotating electric machine. SOLUTION: A stator 9 is made by winding a plurality of coils 9 around a core 9a, and a rotor 10 is provided around the stator 9. This stator 10 is made by bonding a plurality of rotor magnets 10b to a housing 10a, and at the housing 10a, a plurality of gap-measuring holes 10e are made opposite to an air gap 15. In this case, a gage 23 is inserted into the air gap 15 from the gap-measuring hole 10e in the setup condition or assembly condition of the motor 11, and based on the insertion state to the air gap 15 of the gage 23, the width dimension w of the air gap 15 can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine having a configuration for measuring an air gap between a stator and a rotor.

[0002]

For example, in the case of an outer rotor type three-phase DC brushless motor, the air gap is controlled by the dimensional accuracy of each of the stator and the rotor, and the air gap is controlled in the assembled state or the assembled state of the motor. Could not be measured. For this reason, the air gap varies due to the material, processing accuracy, process capability, and the like during mass production, and the electric characteristics, torque characteristics, electromagnetic noise, vibration, and the like of the motor may not be stabilized. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotating electric machine capable of actually measuring an air gap in an assembled state or an assembled state.

[0003]

The rotary electric machine according to the present invention is characterized in that a gap measuring hole for measuring an air gap between the stator and the rotor is provided. According to the above means, a gauge is inserted into the air gap from the gap measurement hole in the assembled state or the assembled state of the rotating electric machine, and the width of the air gap is actually measured based on the insertion state of the gauge into the air gap, or the gap measurement is performed. The width of the air gap can be measured based on the visual recognition of the air gap through the hole. For this reason, the air gap can be adjusted based on the actual measurement result of the air gap, and the air gap that is not within the predetermined range can be excluded, so that the electrical characteristics, torque characteristics, electromagnetic noise, vibration, and the like are stabilized.

According to a second aspect of the present invention, a gap measuring hole is provided in the rotor, and a part of a surface of the gap measuring hole is substantially linear with one surface of a rotor magnet forming an air gap with the stator. It has features in what it does. According to the above means, the gauge can be inserted into the air gap along a portion of the surface of the gap measurement hole along one surface of the rotor magnet. For this reason, the gauge is prevented from being hooked on the stator, and the workability of inserting the gauge into the air gap is improved.

According to a third aspect of the present invention, the rotor has a housing made of metal, a rotor magnet, and a resin portion for integrating the housing and the rotor magnet, and a gap measurement hole is provided in the resin portion. Is characterized in that the creepage surface is constituted by the resin portion. According to the above means, the surface of the gap measurement hole is made of resin. For this reason, it becomes difficult for the gauge to be caught between different materials (for example, between a metal housing and a resin portion), and the workability of inserting the gauge into the gap measurement hole is improved.

According to a fourth aspect of the present invention, the rotor has a metal housing, a rotor magnet, a resin portion for integrating the housing and the rotor magnet, and a gap measuring hole is provided in the housing. It is characterized in that the creepage is constituted by the housing. According to the above means, the surface of the gap measuring hole is formed by the metal housing. For this reason, the gauge is prevented from being caught between different materials, and the workability of inserting the gauge into the gap measurement hole is improved.

The rotating electric machine according to the fifth aspect is characterized in that a gap measuring hole is formed in a bearing bracket that supports a rotating shaft of a rotor. According to the above means, the gap measurement hole can be provided even when there is no space corresponding to the air gap in the rotor or the like.

[0008] The rotating electric machine according to claim 6 is characterized in that the insertion start end of the gauge is inclined or arcuate on the surface of the gap measuring hole. According to the above-described means, when the gauge is inserted into the gap measurement hole, it is difficult for the gauge to be hooked on the insertion start end of the gap measurement hole, so that the workability of inserting the gauge into the gap measurement hole is improved.

[0009] The rotary electric machine according to claim 7 is characterized in that the radial width of the gap measuring hole is larger than the air gap. According to the above means, since the radial width of the gap measurement hole is larger than the air gap, it is easy to insert the gauge into the air gap through the gap measurement hole.

[0010]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. First, in FIG.
A water receiving tank 3 is provided in the outer box 1 through a plurality of elastic suspension mechanisms 2.
Are elastically suspended. At the bottom of the water receiving tank 3, FIG.
As shown in FIG. 1, an upper cup 5 made of metal is screwed, and an outer ring of a roller bearing 5a is fixed to the center of the upper cup 5.

A metal lower cup 6 is welded to the upper cup 5. An outer ring of a roller bearing 6a is fixed to the center of the lower cup 6, and a cylindrical tank shaft 7 is fixed to the inner ring of the roller bearing 5a and the inner ring of the roller bearing 6a. As shown in FIG. 3, a rotary tank 8 is screwed to the upper end of the tank shaft 7, and the rotary tank 8 is housed in the water receiving tank 3.

A stator 9 is screwed to the lower cup 6, as shown in FIG. This stator 9 has 36
It is mainly composed of a pole-shaped stator core 9a, two insulating covers 9b covering the stator core 9a in the axial direction, and 36 coils 9c.
Are provided with both insulating covers 9b on each tooth of the stator core 9a.
It is wound from above.

The rotor 10 includes a disk-shaped housing 10a made of an iron plate, 24 rotor magnets 10b adhered to the inner peripheral surface of the housing 10a, and a housing 10a.
and a resin bracket 10c formed at the center of the bracket a. A metal pipe boss 10d is embedded in the bracket 10c. still,
Reference numeral 11 denotes an outer rotor type three-phase DC brushless motor including the stator 9 and the rotor 10.

A stirring shaft 12 is housed in the tank shaft 7, and at the upper end of the stirring shaft 12, as shown in FIG.
The stirrer 13 is screwed in the rotary tank 8. As shown in FIG. 2, a boss 10d of the rotor 10 is inserted into the lower end of the stirring shaft 12. A screw 14 is fastened to the lower end of the stirring shaft 12, and the rotor 10 is fixed to the stirring shaft 12 by fastening a boss 10 d between the screw 14 and the stirring shaft 12. .

FIG. 1 shows a housing 10a of the rotor 10.
As shown in FIG.
Are formed (only one is shown). Each of the gap measurement holes 10e faces the air gap 15 between the stator 9 and the rotor 10, and the inner peripheral portion of the surface of each of the gap measurement holes 10e vertically extends the outer peripheral surface of the stator core 9a. The outer peripheral portion of the surface along each of the gap measurement holes 10e is located within a curved surface extending vertically downward from the inner peripheral surface of the rotor magnet 10b.

The design value of the radial width W of the air gap 15 is 1.0 mm. The tolerance of the air gap 15 is ± 0.5 mm, and this tolerance takes into account the assembly tolerance when assembling the stator 9 and the rotor 10 and the mass production processing tolerance when mass-producing the stator 9 and the rotor 10. It was done.

At the upper end of the outer box 1, as shown in FIG.
An operation panel 16 is mounted on the front side, in which a DC power supply circuit for converting a commercial AC power supply to a double-voltage DC power supply and six IGBTs are connected in a three-phase bridge. An inverter circuit, a control device mainly composed of a microcomputer (both not shown), and the like are incorporated. The output side of the inverter circuit is connected to the coil 9c of each phase of the stator 9, and the control device performs PWM control of each IGBT of the inverter circuit, thereby causing the DC power supply circuit to control each phase through the inverter circuit. The driving power is supplied to the coil 9c, and the stirring shaft 12 and the stirring body 13 are rotated at the target speed integrally with the rotor 10.

On the outer peripheral surface of the tank shaft 7, as shown in FIG.
A clutch holder 17 is fixed between the lower cup 6 and the rotor 10, and a clutch 19 is rotatably connected to an outer portion of the clutch holder 17 via a shaft 18. A convex portion 19a is formed on the clutch 19, and one end of a toggle spring 20 is pushed into the convex portion 19a. The toggle spring 20 is formed of a compression coil spring.

The other end of the toggle spring 20 is pushed into a concave portion (not shown) of the clutch holder 18, and the toggle spring 20 is configured such that the convex portion 19a of the clutch 19 moves in the direction of the arrow A of the neutral line α. In some cases, the clutch 19 is urged in the direction of arrow A so that the projection 19a of the clutch 19
If it is in the direction, the clutch 19 is urged in the direction opposite to the arrow A.

The housing 10a of the rotor 10 is provided with a plurality of engaging projections 10f extending radially. Each of these engaging projections 10f is made of synthetic resin,
It is formed integrally when the bracket 10c is formed. A coupling projection 19b is formed on the lower surface of the clutch 19, and as shown by a two-dot chain line, when the clutch 19 is turned in the direction indicated by the arrow A, the coupling projection 19b is engaged with the engagement projection 10f. It is engaged between.

When the rotor 10 rotates in this state, the torque of the rotor 10 is transmitted from the connecting projection 19b to the tank shaft 7 via the clutch 19 and the clutch holder 17, and the clutch holder 17, the clutch 19, and the tank shaft 7 The rotary tank 8 rotates integrally. At the same time, the rotational force of the rotor 10 is transmitted to the agitator 13 through the agitator shaft 12, and the agitator 13 rotates in synchronization with the rotary tub 8, thereby performing a dehydration operation (so-called direct drive method).

The upper cup 5 and the lower cup 6 have a screw 21
Is fixed, and a lever 22 is rotatably mounted on the screw 21. A torsion coil spring (not shown) is mounted on the outer periphery of the screw 21, and the torsion coil spring biases the lever 22 so that the lever 22 retracts outside the rotation locus of the clutch 19. ing. Further, a lever motor (not shown) is connected to the lever 22. When the lever 22 rotates in accordance with the operation of the lever motor and enters the rotation locus of the clutch 19, the rotor 1
The clutch 19, which rotates integrally with the clutch 0, comes into contact with the lever 22, and rotates around the shaft 18 in the direction of arrow A as indicated by the solid line.

On the upper surface of the clutch 19, a restraining projection 19c is formed. A clutch engagement hole 6b is formed in the lower cup 6, and when the clutch 19 rotates in the direction of arrow A and the restraining projection 19c engages in the clutch engagement hole 6b, the coupling projection of the clutch 19 is formed. The engagement between the portion 19b and the engagement protrusion 10f of the rotor 10 is released, and the rotation of the tank shaft 7 is restrained via the clutch 19, the clutch holder 17, and the lower cup 6. Therefore, the rotational force of the rotor 10 is
The washing operation is carried out only to the stirring body 13 through the passage.

When the lever motor operates and the lever 22 rotates with the restraining projection 19c of the clutch 19 engaged with the clutch engagement hole 6b of the lower cup 6, the lever 22 comes into contact with the clutch 19, As shown by the two-dot chain line in FIG.
The clutch 19 rotates in the direction opposite to the arrow A. Then, the connecting projection 19b of the clutch 19 is connected to the engagement projection 10 of the rotor 10.
Thus, the engagement between the restraining projection 19c of the clutch 19 and the clutch engagement hole 6b of the lower cup 6 is released.

In the case of the above-mentioned washing machine, gauges 23 (see FIG. 1) of various sizes corresponding to the radial width W of the air gap 15 are prepared, and the radial width W of the air gap 15 is measured. First, the stator 9 is fixed to the lower cup 6, the rotor 10 is fixed to the stirring shaft 12, and the motor 11 is attached to the washing machine. Next, as shown by a two-dot chain line in FIG.
A plurality of gauges 23 are inserted into the air gap 15, and whether the radial width W of the air gap 15 is within the range of “1.0 ± 0.5 mm” based on the insertion state of each gauge 23 into the air gap 15 is determined. Confirm.

According to the above embodiment, the gap measuring hole 10e for measuring the air gap 15 between the stator 9 and the rotor 10 is provided. For this reason, the width W of the air gap 15 is actually measured in the assembled state of the motor 11, and the air gap 15 is adjusted based on the actual measurement result of the width W, or the motor 11 in which the air gap 15 is not within a predetermined range is excluded. Therefore, the electrical characteristics, torque characteristics, electromagnetic noise, vibration, and the like of the motor 11 are stabilized.

Further, the outer peripheral portion of the surface of the gap measuring hole 10e and the inner peripheral surface of the rotor magnet 10b are made straight. For this reason, the gauge 23 is connected to the gap measurement hole 10e.
Can be inserted into the air gap 15 along the inner peripheral surface of the rotor magnet 10b from the outer peripheral portion of the rotor magnet 10b, thereby preventing the gauge 23 from being caught on the outer peripheral portion of the stator core 9a. Therefore, the workability of inserting the gauge 23 into the air gap 15 is improved, so that the work of measuring the air gap 16 is performed quickly and accurately.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. First, in FIG. 5, a plurality of holes 10g are formed below the air gap 15 in the housing 10a (only one hole is shown). Further, a resin portion 10h is formed on an outer peripheral portion of the housing 10a. The resin portion 10h is integrally formed at the time of forming the bracket portion 10c and the plurality of engaging projections 10f.
b is fixed to the housing 10a.

As shown in FIG. 4, a gap measuring hole 10i is formed in each hole 10g in the resin portion 10h. Each of the gap measurement holes 10i has a surface (inner surface) entirely formed of a resin portion 10h, and an inner peripheral portion of the surface of each of the gap measurement holes 10i has an inclined shape that is inclined toward the outer periphery as going upward. The outer peripheral portion of the creepage surface of each gap measurement hole 10i has an inclined shape that is inclined toward the inner peripheral side as going upward.

The inner peripheral portion of the surface of each gap measuring hole 10i is located on the inner peripheral side from the outer peripheral surface of the stator core 9a.
The outer peripheral portion of the surface of each gap measurement hole 10i has an upper end portion in a straight line with the inner peripheral surface of the rotor magnet 10b, and the radial width of each gap measurement hole 10i is set to be larger than the air gap 15. I have.

According to the above embodiment, the gap measuring hole 10
The surface of i was constituted by the resin portion 10h. For this reason, unlike the case where the surface of the gap measurement hole 10i is formed by the resin portion 10h and the housing 10a, the gauge 23
When the gauge 23 is inserted into the gap measuring hole 10i, the gage 23 is prevented from being caught at the boundary between the resin portion 10h and the housing 10a, so that the workability of inserting the gauge 23 into the gap measuring hole 10i is improved.

The surface of the gap measurement hole 10i is inclined. Therefore, when the gauge 23 is inserted into the gap measurement hole 10i, the gauge 23 is prevented from being hooked on the lower end (the insertion start end of the gauge 23) of the gap measurement hole 10i. The workability of inserting the gauge 23 is further improved.

Since the width of the gap measurement hole 10i in the radial direction is larger than that of the air gap 15, the gauge 23 can be easily inserted into the air gap 15 through the gap measurement hole 10i. In particular, when the radial width dimension of the air gap 15 has a plus tolerance (specifically, +0.5 mm), the radial width dimension of the gap measurement hole 10 i is larger than the air gap 15.
If they are the same, the gauge 23 corresponding to the plus tolerance cannot be inserted into the gap measurement hole 10i. On the other hand, the radial width of the gap measurement hole 10 i is
If it is larger, the plus tolerance gauge 23 can be easily inserted into the gap measurement hole 10i.

Since the upper end on the outer peripheral side of the surface of the gap measuring hole 10i is aligned with the inner peripheral surface of the rotor magnet 10b, the gauge 23 is connected to the gap measuring hole 10e.
Can be inserted into the air gap 15 along the inner peripheral surface of the rotor magnet 10b. Therefore, the gauge 23 is prevented from being hooked on the stator core 9a, and the workability of inserting the gauge 23 into the air gap 15 is improved.

Next, a third embodiment of the present invention will be described with reference to FIG. The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. Housing 10a of rotor 10
Are formed with a plurality of gap measurement holes 10j.
These gap measurement holes 10j are formed by pressing (pressing) the housing 10a, and the entire surface of each gap measurement hole 10j is constituted by the housing 10a.

The lower surface of the surface of each gap measurement hole 10j has an arc shape (R shape). The inner peripheral portion of the outer surface of each of the gap measurement holes 10j is located on the inner peripheral side of the outer peripheral surface of the stator core 9a. Each gap measurement hole 10 is linear with the peripheral surface.
The radial width dimension of j is set larger than the air gap 15.

According to the above embodiment, the gap measuring hole 10
j was formed by the housing 10a. Therefore, unlike the case where the surface of the gap measurement hole 10j is formed by the resin portion 10h and the housing 10a, when the gauge 23 is inserted into the gap measurement hole 10j, the gauge 23 is moved by the boundary between the resin portion 10h and the housing 10a. Is prevented from being caught by the
Insertion workability into the gap measurement hole 10j is improved.

The lower end of the surface of the gap measurement hole 10j is formed in an arc shape. Therefore, when inserting the gauge 23 into the gap measurement hole 10j, the gap measurement hole 2
Gauge 23 is prevented from being hooked on the lower end of 3.
In particular, the surface of the gap measurement hole 10j is
In the case where the gap measuring hole 10j is formed, it is difficult to form the lower end of the surface of the gap measuring hole 10j in an inclined shape.

Further, since the radial width of the gap measurement hole 10j is made larger than the air gap 15, the gauge 23 can be easily inserted into the air gap 15 through the gap measurement hole 10j. At the same time, the positive tolerance gauge 23 can be easily inserted into the gap measurement hole 10j.

The upper end on the outer peripheral side of the surface of the gap measurement hole 10j is aligned with the inner peripheral surface of the rotor magnet 10b. Therefore, the gauge 23 can be easily inserted into the air gap 15 along the inner peripheral surface of the rotor magnet 10b from the gap measurement hole 10j.

In the first to third embodiments, the width W of the air gap 15 is measured by inserting the gauge 23 into the air gap 15 through the gap measuring holes 10e, 10i, 10j. The present invention is not limited to this. For example, the gap measurement holes 10e, 10i,
The width dimension W of the air gap 15 may be visually measured as the air gap 15 is visually observed through the inside of 10j.

In the first to third embodiments,
Although a plurality of gap measurement holes 10e, 10i, and 10j are formed in the rotor 10, the invention is not limited to this. For example, only one gap measurement hole may be formed. In addition, the first to third
In the embodiment, the gap measurement holes 10e, 10i, 1
Although 0j has a rectangular shape (arc shape) extending in the circumferential direction, it is not limited to this, and may be, for example, a circular shape or an elliptical shape extending in the circumferential direction.

In the first to third embodiments,
Although the present invention has been applied to the outer rotor type DC brushless motor, the present invention is not limited to this, and can be applied to various motors such as an inner rotor type DC brushless motor and a capacitor induction motor. FIG. 7 shows a fourth embodiment in which the present invention is applied to a condenser induction motor 28 for rotating a rotating tub and a stirring body of a washing machine. Hereinafter, a fourth embodiment of the present invention will be described in detail.

The outer race of the roller bearing 24a and the outer ring of the roller bearing 25a are fixed to the bearing brackets 24 and 25, and the rotating shaft 26a of the rotor 26 is fixed to the inner ring of the roller bearing 24a and the inner ring of the roller bearing 25a. I have. The bearing brackets 24 and 25
Is formed of a metal such as iron or stainless steel.

A stator 27 is fixed to the bearing brackets 24 and 25. The stator 27 is formed by winding a plurality of coils 27b around a stator core 27a, and a plurality of gap measurement holes 24b and 25b are formed in the bearing brackets 24 and 25. The gap measurement holes 24b and 25b face the air gap between the rotor 26 and the stator 27, and the radial width of each gap measurement hole 24b and 25b is determined by the air gap 29 between the rotor 26 and the stator 27. It is set larger.

According to the above embodiment, the plurality of gauges 23 are inserted into the air gap 29 through the gap measuring holes 24b and 25b in the assembled state of the motor 28 or the assembled state to the washing machine. Then, based on the state of insertion of each gauge 23 into the air gap 29, it is measured whether the radial width of the air gap 29 is within a predetermined range. Therefore, the air gap 29 can be adjusted based on the measurement result, and the motor 28 whose air gap 29 is not within the predetermined range can be excluded, so that the electric characteristics, torque characteristics, electromagnetic sound, vibration, etc. of the motor 28 are stable. Become

Further, since the gap measuring holes 24b and 25b are formed in the bearing brackets 24 and 25, the gap measuring holes 24b and 25b can be provided even when the rotor 26 and the stator 27 have no space corresponding to the air gap. become.

In the fourth embodiment, the burring process or the like is performed at the time of forming each of the gap measurement holes 24b and 25b.
The circumference of 5b may be formed in an arc shape. In the case of this configuration, the gauge 23 is prevented from being hooked on the insertion start ends of the gap measurement holes 24b and 25b, so that the workability of inserting the gauge 23 into the gap measurement holes 24b and 25b is improved.

In the fourth embodiment, the width of the air gap 29 is measured by inserting the gauge 23 into the air gap 28 through the gap measuring holes 24b and 25b. However, the present invention is not limited to this. Instead, for example, the width of the air gap 29 may be visually measured as the air gap 29 is visually observed through the gap measurement holes 24b and 25b. In the fourth embodiment, a plurality of gap measurement holes 24b and 25b are formed in the bearing brackets 24 and 25. However, the present invention is not limited to this.
Only one may be formed.

In the fourth embodiment, the gap measuring holes 24b are formed in both the bearing brackets 24 and 25.
And 25b are formed, but the invention is not limited to this. For example, gap measurement holes 24b and 25b may be formed in one of the bearing brackets 24 and 25.

[0051]

As is apparent from the above description, the rotating electric machine of the present invention has the following effects. According to the first aspect, a gap measuring hole for measuring an air gap between the stator and the rotor is provided. For this reason, the width of the air gap is actually measured in the assembled state or the assembled state of the rotating electric machine, and the air gap can be adjusted based on the actual measurement result, and the air gap that is not within the predetermined range can be excluded. Electrical characteristics, torque characteristics, electromagnetic sound, vibration, etc. are stabilized.

According to the second aspect, a part of the surface of the gap measuring hole and one surface of the rotor magnet are made straight. For this reason, the gauge can be inserted into the air gap along the one surface of the rotor magnet from the gap measurement hole, so that the workability of inserting the gauge into the air gap is improved.

According to the third aspect, the surface of the gap measuring hole is made of resin. For this reason, the gauge is prevented from being caught between different materials, and the workability of inserting the gauge into the gap measurement hole is improved.

According to the fourth aspect of the present invention, the surface of the gap measuring hole is formed of a metal housing. For this reason, the gauge is prevented from being caught between different materials, and the workability of inserting the gauge into the gap measurement hole is improved.

According to the fifth aspect of the present invention, since the gap measuring hole is formed in the bearing bracket, the gap measuring hole can be provided even when there is no space corresponding to the air gap in the rotor or the like.

According to the sixth aspect of the present invention, at least a part of the surface of the gap measuring hole is formed in an inclined shape or an arc shape. For this reason, the gauge is prevented from being caught on the insertion start end of the gap measurement hole, and the workability of inserting the gauge into the gap measurement hole is improved.

According to the seventh aspect of the present invention, since the radial width of the gap measuring hole is made larger than the air gap, it is easy to insert the gauge into the air gap through the gap measuring hole.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention (a is a cross-sectional view showing a main part of a motor, and b is a view showing an arrow X direction).

FIG. 2 is a sectional view showing a clutch, a lever, a motor, and the like.

FIG. 3 is a cross-sectional view showing the entire configuration of the washing machine.

FIG. 4 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 2;

FIG. 6 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 7 is a view showing a fourth embodiment of the present invention (a is a cross-sectional view showing a condenser induction motor, and b is a cross-sectional view showing an enlarged main part).

[Explanation of symbols]

9 is a stator, 10 is a rotor, 10b is a rotor magnet, 10e is a gap measurement hole, 10h is a resin part, 10i.
Is a gap measurement hole, 10j is a gap measurement hole, 11 is a motor, 15 is an air gap, 23 is a gauge, 24 is a bearing bracket, 24b is a gap measurement hole, 25 is a bearing bracket, 25b is a gap measurement hole, 26 is a rotor, 27
Denotes a stator, 28 denotes a motor, and 29 denotes an air gap.

Claims (7)

[Claims] 1. A rotating electric machine having a gap measuring hole for measuring an air gap between a stator and a rotor. 2. A gap measuring hole is provided in a rotor, and a part of a surface of the gap measuring hole is substantially linear with one surface of a rotor magnet forming an air gap between the gap measuring hole and a stator. Rotating electric machine. 3. The rotor has a metal housing, a rotor magnet, a resin part for integrating the housing and the rotor magnet, a gap measuring hole is provided in the resin part, and a surface of the gap measuring hole is the resin part. The rotating electric machine according to claim 1, wherein the rotating electric machine is configured by: 4. The rotor has a metal housing, a rotor magnet, a resin part for integrating the housing and the rotor magnet, a gap measuring hole is provided in the housing, and a surface of the gap measuring hole is formed by the housing. The rotating electric machine according to claim 1, wherein the rotating electric machine is provided. 5. The rotating electric machine according to claim 1, wherein the gap measuring hole is formed in a bearing bracket that supports a rotating shaft of the rotor. 6. The rotating electric machine according to claim 1, wherein the insertion start end of the gauge has an inclined or arcuate shape along the surface of the gap measuring hole. 7. The air gap according to claim 1, wherein the radial width of the gap measuring hole is larger than the air gap.
The rotating electric machine according to any one of the above.