JP2001128393A - Dynamo-electric machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo-electric machine which assures sufficient accuracy at the end position of teeth member, even in a molded stator. SOLUTION: In a dynamo-electric machinery, consisting of a stator formed of resin mold of the laminate of a stator iron steel 1, a rotor having a rotating shaft and end bracket holding the stator and rotor or the like, the internal circumference surface of stator is provided a groove 16, which is formed in the angle of equal interval and extended linearly in the shaft direction. The groove 16 has the deeper side formed in the shape of an inverted wedge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rotating electric machine,
In particular, the present invention relates to a small rotating electric machine in which a stator in which a stator iron plate including a ring member and a teeth member is laminated is improved.

[0002]

2. Description of the Related Art As an electric device for converting electric energy into mechanical energy, an electric motor (motor) is known. In an electric motor, an electric system and a mechanical system are coupled, and a relative motion between a magnetic field and a conductor, an electromagnetic force between a magnetic field and a current, an attractive force between magnetic fields, a repulsive force, and the like are used. As one type of electric motor, a rotating electric machine that performs a rotating motion is known, and a DC motor, an AC motor, or the like is used.

[0003] A rotating electric machine such as an AC servomotor,
As shown in FIG. 5, the motor includes a stator including a stator core 101 and a stator coil 102, a rotor 103, a frame 105, end brackets 106 and 107, and the like. The stator is swaged with a stack of stator iron plates,
Alternatively, the stator core 101 may be fixed by laser welding or the like.
The stator coil 1 is inserted into the groove of the stator core 101.
02 is formed. The stator iron plate is formed, for example, by punching a strip-shaped iron plate. The punched shape has a main body functioning as a magnetic circuit, and a corner provided with a through bolt hole for fixing the stator to the end bracket 106. It is generally composed of The rotor 103 has a rotating shaft 104 and is rotatably held by end brackets 106 and 107 by bearings 108 and 109. Bearing 1
08 is protected by a bearing holding cover 133. The load side end bracket 106 has a through bolt hole and an external mounting bolt hole, fixes the stator with the through bolt hole and the through bolt, and is externally mounted by the external mounting bolt hole and the external mounting bolt. . Note that an encoder 110 is provided, and position and speed detection and the like are performed.

Conventionally, it has been proposed to use a ring member and a teeth member as a stator iron plate of a rotating electric machine (for example, see Japanese Patent Application Laid-Open No. 63-299752).
The ring member has a donut shape and has an insertion groove.
The teeth member has an elongated plate shape, and has an insertion portion, a root portion, a shoulder portion, and a foot portion. The ring member and the tooth member are manufactured by laminating each other, attaching a coil, inserting an insertion portion of the tooth member into an insertion groove of the ring member, fixing the same, and finally injecting a mold resin.

However, in the prior art, the inner peripheral surface of the stator has not been studied in detail, and the surface has no irregularities. For this reason, the positioning of the teeth member depends on the accuracy of the insertion portion, and the error at the tip portion has been large. For this reason, there is a slight change in torque depending on the rotational position of the rotor, and vibration during rotation is likely to occur.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and has as its object to provide a rotating electric machine which can ensure sufficient positional accuracy of the tip end of a tooth member even in a molded stator. It is an object.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a rotating electric machine comprising a stator in which a laminate of stator iron plates is resin-molded, a rotor having a rotating shaft, an end bracket for holding the stator and the rotor, and the like. To
The rotating electric machine is formed at equal intervals and has a straight groove in the axial direction.

Further, the present invention is the rotating electric machine, wherein the groove has an inverted wedge shape with a large depth.

The present invention is the rotating electric machine, wherein the groove has a plate shape.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. FIGS. 1 to 5 show an embodiment of the rotating electric machine according to the embodiment.
This will be described with reference to FIG. FIG. 1 is an explanatory cross-sectional view of a rotating electric machine according to an embodiment. FIG. 2 is an explanatory diagram of a jig in a manufacturing process of the rotating electric machine according to the embodiment. FIG. 3 is an explanatory diagram of a coil indicating groove in the rotating electric machine according to the embodiment. FIG. 4 is an explanatory diagram of a modification of the jig in the manufacturing process of the rotating electric machine according to the embodiment. FIG. 5 is an explanatory diagram of the rotating electric machine.

An embodiment will be described. As shown in FIG. 4, the rotating electric machine according to the present embodiment includes a stator including a stator core 101 and a stator coil 102, a rotor 103, a frame 104, end brackets 106 and 107, and the like.
1, the stator is manufactured by laminating a plurality of stator iron plates 1 and fixing them by molding, and has a groove 16 on the inner peripheral surface. Two adjacent teeth members 1 are provided inside the stator in contact with the groove 16.
An air gap is provided between the tips of the third and the third. Stator iron plate 1 includes ring member 11 and teeth member 13. The ring member 11 has an insertion groove 12 and the like. The tooth member 13 has a convex portion 14, a shoulder portion 15, a foot portion 16, and the like, and a coil 17 is provided around the tooth member 13. Rotor 10
Reference numeral 3 has a rotating shaft 104 and is rotatably held by end brackets 106 and 107 by bearings 108 and 109. Frame 105 houses the stator and is coupled to end brackets 106,107. The load-side end bracket 106 has a flange attachment portion. Further, an encoder 110 is provided, and position and speed detection and the like are performed.

Next, a method of manufacturing the rotating electric machine according to the embodiment will be described. A laminated body of the ring member 11 and a laminated body of the tooth member 13 are formed by an ordinary method, and the projection 14 of the tooth member is inserted into the insertion groove 12 of the ring member. Next, as shown in FIG. 2, the jig 18a is hung on the foot 15 of the tooth member, and the mold resin is injected while applying a force in the direction of the center serving as the rotor rotation axis. By extracting, a rotating electric machine is manufactured. As a result, since the mold resin is not injected into the portion where the jig 18a is present, the portion where the jig 18a is extracted becomes the groove 16 as shown in FIG. And jig 1
8a is placed between the tips of the two teeth members, and the resulting groove 16 will indicate the location of the gap between the two teeth members, ie, a slot opening indicating groove. Since the jig has an inverted wedge shape with a large depth, the formed slot opening indicating groove also has an inverted wedge shape with a large depth. The side surface 15a of the foot 15 of the teeth member
By tilting the teeth toward the center line 19 (to the right in the figure) outward from the direction parallel to the center line 19 of the tooth member, the degree of engagement between the jig and the tooth member is ensured.

A modification of the jig will be described. In this example, as a shape of a jig, as shown in FIG. 4, a plate-shaped portion is hung on the foot 15 of the tooth member. Otherwise, it is the same as FIG. Therefore, the formed groove has a plate shape. Note that the side surface 15b of the foot 15 of the tooth member has little effect on the degree of engagement between the jig and the tooth member.

[0014]

According to the present invention, the gap (slot opening) between the molded teeth members becomes accurate, and a rotating electric machine with less torque fluctuation can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a rotating electric machine according to an embodiment.

FIG. 2 is an explanatory diagram of a jig in a manufacturing process of the rotating electric machine according to the embodiment.

FIG. 3 is an explanatory diagram of a coil opening indicating groove in the rotary electric machine according to the embodiment.

FIG. 4 is an explanatory view of a modification of a jig in a manufacturing process of the rotating electric machine according to the embodiment.

FIG. 5 is an explanatory diagram of the rotating electric machine according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron plate 11 Ring member 12 Insertion groove 13 Teeth member 14 Convex part 15, 15a, 15b Foot 16 Groove 17 Coil 18 Jig 19 Center line 101 Stator core 102 Stator coil 103 Rotor 104 Rotation axis 105 Frame 106, 107 End bracket 108, 109 Bearing 110 Encoder

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor ▲ Yanagi ▼ Eiji Tadashi 7-1-1 Higashi-Narashino, Narashino-shi, Chiba F-term in the Industrial Equipment Group, Hitachi, Ltd. 5H002 AA07 AB06 AC06 AC07 AC08 AE07 AE08

Claims (3)

[Claims] 1. A rotating electric machine comprising a stator in which a laminated body of stator iron plates is resin-molded, a rotor having a rotating shaft, an end bracket for holding the stator and the rotor, and the like. A rotating electric machine characterized by having a straight groove in the axial direction. 2. The rotating electric machine according to claim 1, wherein the groove has an inverted wedge shape with a large depth. 3. The rotating electric machine according to claim 1, wherein the groove has a plate shape.