JPH069350U - Rotor core of rotating electric machine - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to obtain a rotor core of a rotating electric machine that can cool a rotor core around which a winding is wound, without increasing the size of the rotating electric machine. [Structure] A plurality of radially formed teeth 7 of a rotor core 6 are provided with first teeth 7a and second teeth 7b having different shapes and are alternately arranged. Then, the tip outer peripheral portion 9b of the second tooth 7b is curved toward the winding portion 8 side of the first tooth, and there is no change between the respective winding portions 8 of each tooth 7, and the tip end of the first tooth 7a. The gap between the outer peripheral portion 9a and the outer peripheral portion 9b at the tip of the second tooth 7b is increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotor core of a rotary electric machine, and more particularly, to a rotor core of the rotary electric machine provided with a cooling mechanism.

[0002]

[Prior art]

 Conventionally, there is a rotor core of a rotating electric machine provided with a cooling mechanism as disclosed in Japanese Patent Laid-Open No. SHO 61-121940, which is shown in FIG. According to this, the rotary electric machine 30 is fixed to the bottomed cylindrical housing 31 forming the outer frame, the end plate 32 that covers the one-directional opening side of the housing 31, and the radial inner circumference of the housing 31. A magnet 33, a rotor core 34 that is provided so as to face the inner circumference of the magnet 33, and has a winding wound around it, and a rotating shaft 35 that penetrates in the thrust direction of the rotor core 34 and that rotates with the rotor core 34. A bearing 36 for supporting the rotary shaft 35, a commutator 37 fixed to the rotary shaft 35 and rotating with the rotary shaft 35, a brush 38 disposed on the end plate 32 and abutting against the circumferential surface of the commutator 37 in the radial direction are provided. There is.

The rotor core 34 is formed by laminating a plurality of rotor core plates 34 a, and the rotor core plates 34 a on both ends in the thrust direction of the rotor core 34 are in opposite directions, That is, one side is bent toward the bottom of the housing 31, and the other side is bent toward the end plate 32. Therefore, fan-shaped cooling fans 34b are formed at both ends in the thrust direction of the rotor core 34.

With the above-described configuration, the commutator 37 and the rotating shaft 35 rotate, and at the same time, the rotor core 34 around which the winding is wound also rotates. When the cooling fan 34b formed on the rotor core 34 rotates, air flows from one side of the rotor core 34 toward the other side, and the inside of the rotor core 34 can be cooled.

[0005]

[Problems to be solved by the device]

 However, by providing the cooling fan in the thrust direction of the rotor core in this way, there is a problem that the length of the rotor core in the thrust direction becomes large and the main body of the rotary electric machine becomes large in size. Further, in the case of forming a rotor core by stacking a plurality of rotor core plates as in this conventional example, the shape of the rotor core plates on both ends in the thrust direction is the rotor core laminated between them. There is also a problem that the lamination process becomes complicated because it is different from the plate shape.

Therefore, an object of the present invention is to obtain a rotor core of a rotating electric machine that can cool a rotor core around which a winding is wound, without inviting an increase in the size of the rotating electric machine.

[0007]

[Means for Solving the Problems]

 According to the present invention, the first tooth is formed of a tip outer peripheral portion facing the rotating electric machine stator and a winding portion around which the winding is wound, and the tip outer peripheral portion curved toward the winding portion and the winding are wound. A rotor core of a rotating electric machine, comprising: a second tooth including a wound winding portion, wherein the first tooth and the second tooth are alternately arranged. It is used as a rotor core of a rotating electric machine.

[0008]

[Action]

 According to the present invention, since the tip outer peripheral portion of the second tooth is curved toward the winding portion side of the first tooth, the first core and the second tooth are rotated by the rotation of the rotor core. Air flows into the center side of the rotation axis of the rotor core from between the teeth. At this time, the air flows along the tip outer periphery of the second tooth from the rear side in the rotation direction of the rotor core at the tip outer periphery of the second tooth, and then the second tooth. Next to the teeth of the rotor core, the coil collides with the winding portion of the first tooth located on the rear side in the rotation direction of the rotor core, and further collides with the winding portion of the second tooth.

[0009]

[Effect of device]

 As described above, according to the present invention, by forming the fan shape by the teeth of the rotor core and using the rotor core itself as a cooling fan, it is possible to cool the rotor core around which the winding is wound. As a result, it is possible to cool the entire inside of the rotating electric machine.

[0010]

【Example】

 An embodiment of a rotating electric machine having a rotor core of the rotating electric machine according to the present invention will be described with reference to FIGS. As shown in FIG. 2, the rotary electric machine 1 is fixed to the motor housing 2 having a bottomed cylindrical shape and a flange 2a formed on the opening side of the motor housing 2 with bolts 15 so that the opening side of the motor housing 2 is fixed to the opening side. An outer shell is formed by the end housing 3 that covers.

A magnet 4 is adhered and fixed to the radially inner peripheral surface of the motor housing 2, and a rotor is rotatably disposed on the inner peripheral side of the magnet 4. The rotor 5 includes a rotor core 6 in which a plurality of rotor core plates 6 a are laminated, and a winding wire 10 wound around a winding portion 8 which is a root portion of a tooth 7 formed on the rotor core 6. And an output shaft 11 that penetrates an insertion opening 6b formed at the center of the rotor core 6 in the radial direction and rotates together with the rotor core 6, and a commutator 12 fixed to the end housing 3 side of the output shaft 11. Is equipped with.

The output shaft 11 is rotatably supported by a bearing 13 fitted in the recess 2 b of the motor housing 2 and a bearing 14 fitted in the recess 3 a of the end housing 3. ing. Further, an end plate 17 on which a brush device 16 that abuts the commutator 12 is loaded is fixed to the end housing 3 by a bolt 18.

As shown in FIG. 1, a plurality of teeth 7 are radially formed on the rotor core plate 6a. Here, the teeth 7 have a first tooth 7a and a second tooth 7b having different shapes, which are alternately formed.

As shown in FIG. 3, the first tooth 7a is provided with a winding portion 8 around which a winding is wound, and a winding portion 8 continuously provided from the winding portion 8 and gradually widening toward the outer peripheral side. It is formed from the outer peripheral portion 9a. The second teeth 7b are provided continuously with a winding portion 8 around which a winding is wound, and with this winding portion 8, and the width is gradually curved from a width wider than the predetermined width. It is formed from the tip outer peripheral portion 9b which becomes narrow. Further, the first teeth 7a are formed longer than the second teeth 7b by the length A.

As a result, a gap B is formed between the tip outer peripheral portion 9a of the first tooth 7a and the tip outer peripheral portion 9b of the second tooth 7b. In this embodiment, when a plurality of rotor core plates 6a are laminated, the teeth 7 are laminated so as to be parallel to the axial direction of the output shaft 11 (see FIG. 2).

In the above structure, the rotor core 6 rotates together with the output shaft 11 so that the teeth 7 scratch the surrounding air to cool the rotor core 6, the winding 10, and the like. For example, as shown in FIG. 3, when the rotor core 6 rotates in the arrow M direction, air flows in the arrow m direction. That is, the air that has flowed in between the tip outer peripheral portion 9a of the first tooth 7a and the tip outer peripheral portion 9b of the second tooth 7b is wound around the winding portion 8 of the first tooth 7a. 10 as well as the winding 10 wound around the winding portion 8 of the second tooth 7 b. Therefore, the teeth 7 and the windings 10 can be cooled.

Further, when rotating in the direction of arrow N, air flows in in the direction of arrow n. Then, similarly to the above, the teeth 7 and the windings 10 can be cooled.

Further, the air scraped by the teeth 7 flows as shown by the arrow in FIG. That is, the warm air passing between the teeth of the rotor core 6 and the air outside the rotary electric machine 1 are ventilated by the ventilation holes 19 provided in the motor housing 2 and the end housing 3, respectively. . Therefore, the inside of the rotary electric machine 1 can be cooled.

Another embodiment of a rotating electric machine having a rotor core of the rotating electric machine according to the present invention will be described with reference to FIG. The rotating electric machine 20 is different from the rotating electric machine 1 in the shape of the rotor core 6 described above, and since the other structures are the same as those of the rotating electric machine 1, the description of the other structures is omitted.

The rotor core 21 of the rotary electric machine 20 is formed by laminating the rotor core plates 6a while shifting them by a predetermined angle. Thereby, the teeth 7 are skewed by a predetermined angle with respect to the output shaft 11 in the axial direction. Therefore, the cooling fan effect by the rotor core 21 is further improved.

Further, in all the above-mentioned embodiments, the tip outer peripheral portion 9a of the first tooth 7a and the tip outer peripheral portion of the second tooth 7b are not changed without changing the interval between the winding portions 8 of each tooth 7. It is possible to make a large gap with 9b.

In all of the above-mentioned embodiments, the first teeth 7a are longer than the second teeth 7b by the length A, but it is possible to obtain the cooling effect even with the same length.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of a rotating electric machine having a rotor core of the rotating electric machine according to the present invention. (C-C sectional view in FIG. 2)

FIG. 2 is a partial cross-sectional side view showing an embodiment of a rotary electric machine having a rotor core of the rotary electric machine according to the present invention.

FIG. 3 is an explanatory view of an enlarged principle of a main part of the present invention.

FIG. 4 is a partial sectional side view showing another embodiment of a rotating electric machine having a rotor core of the rotating electric machine according to the present invention.

FIG. 5 is a partial cross-sectional front view of a rotary electric machine having a rotor core of a conventional rotary electric machine.

[Explanation of symbols]

 1 Rotating Electric Machine 2 Motor Housing 4 Magnet 6 Rotor Core 7a First Teeth 7b Second Teeth 8 Winding Part 9a Tip Outer Part 9b Tip Outer Part

Claims (1)

[Scope of utility model registration request] 1. A first tooth consisting of a tip outer peripheral portion facing a rotating electric machine stator and a winding portion around which a winding is wound, a tip outer peripheral portion curved toward the winding portion side, and a winding. A rotor core of a rotating electric machine, comprising: a second tooth including a winding portion around which a wire is wound, wherein the first tooth and the second tooth are alternately arranged. The rotor core of the rotating electric machine that features.