阅读说明：本技术 旋转电机 (Rotating electrical machine ) 是由 户谷章人 细谷昌宏 于 2018-05-15 设计创作，主要内容包括：本发明的目的在于提供一种一方面防止线圈的崩散另一方面达成小型化、高功率化的旋转电机。本发明的旋转电机具备：定子,其具有定子铁心、安装在所述定子铁心上的线圈架以及缠绕在所述线圈架的绕线部而产生磁通势的线圈；以及转子,其设置在所述定子的内周侧；该旋转电机的特征在于,所述绕线部在所述旋转电机的旋转轴的轴向上的端面具有限制该绕线部上缠绕的线圈的位置的限制部。(The invention aims to provide a rotating electric machine which prevents coil collapse and achieves miniaturization and high power. A rotating electric machine according to the present invention includes: a stator having a stator core, a bobbin attached to the stator core, and a coil wound around a winding portion of the bobbin to generate magnetomotive force; and a rotor provided on an inner peripheral side of the stator; the rotating electrical machine is characterized in that an end surface of the winding portion in an axial direction of a rotating shaft of the rotating electrical machine is provided with a limiting portion for limiting a position of a coil wound on the winding portion.)

1. A rotating electrical machine is provided with:

a stator having a stator core, a bobbin attached to the stator core, and a coil wound around a winding portion of the bobbin to generate magnetomotive force; and

a rotor provided on an inner peripheral side of the stator;

the rotating electric machine is characterized in that,

an end surface of the winding portion in an axial direction of a rotating shaft of the rotating electrical machine has a regulating portion that regulates a position of a coil wound around the winding portion.

2. The rotating electric machine according to claim 1,

the stator core has a plurality of core pivotal teeth and a core back portion connecting the plurality of core pivotal teeth in a circumferential direction of the rotary shaft,

the winding portion is disposed so as to cover the core pivoting portion,

the stator has a plurality of slots formed therein,

the coil is a concentrated winding coil with at least two layers wound on the winding part,

the coil is composed of conductor parts arranged in the slots and a crossover wire connecting the conductor parts,

the restricting portion is a protrusion protruding in the axial direction,

the protrusion abuts against a portion of the crossover of the first layer of windings, i.e., the first layer of windings, to limit the position of the crossover in the radial direction of the rotating shaft.

3. The rotating electric machine according to claim 2,

when the winding order of the conductor part wound last to the core pivotal tooth part among the first layer of windings is set as (x), a part of the crossover wire connected to the conductor part wound in the order of (x-2) and the conductor part wound in the order of (x-1) is brought into contact with the protrusion part, thereby limiting the position of the crossover wire in the radial direction,

the winding of the second layer is a winding of the second layer, which is a winding of the conductor part or the second layer corresponding to the winding order (x +1) and is disposed adjacent to the conductor part having the winding order (x-1).

4. The rotating electric machine according to claim 2,

the wire that is in contact with the protrusion among the crossover wires is bent so that a position in contact with the protrusion is recessed toward the radial inner diameter side.

5. The rotating electric machine according to claim 2,

the protrusion is provided at a central position in the circumferential direction of the core pivotal teeth portion.

6. The rotating electric machine according to claim 2,

an inclined surface or a notch is provided on the outer peripheral surface of the protrusion, the surface of the protrusion abutting against the overlapping wire.

Technical Field

The present invention relates to a rotary electric machine, and more particularly, to a structure of a bobbin around which a coil is wound.

Background

Conventionally, as a structure of a rotating electric machine, there is a structure in which a bobbin is attached to a stator core and a coil is wound around the bobbin. In such a configuration, when the coil is wound around the bobbin, it is preferable to wind the coil so as not to collapse in order to ensure the reliability of the rotating electric machine.

For example, in the invention described in japanese patent application laid-open No. 2008-148515, a projection projecting in the circumferential direction with respect to the rotation shaft of the rotating electrical machine is provided on the bobbin, and the coil is wound around the projection, thereby preventing the coil from collapsing.

Disclosure of Invention

Problems to be solved by the invention

However, in the invention described in japanese patent application laid-open No. 2008-148515, the projection projects in the circumferential direction, that is, projects so as to narrow the groove in the circumferential direction, and therefore the coil occupying space in the groove is reduced. Thus, the rotating electric machine is increased in size to secure the space occupied by the coil, and if the space occupied by the coil is reduced, the power of the rotating electric machine is reduced.

The invention aims to provide a rotating electric machine which prevents coil collapse and achieves miniaturization and high power.

Means for solving the problems

In order to achieve the above object, a rotating electric machine according to the present invention includes: a stator having a stator core, a bobbin attached to the stator core, and a coil wound around a winding portion of the bobbin to generate magnetomotive force; and a rotor provided on an inner peripheral side of the stator; the rotating electrical machine is characterized in that an end surface of the winding portion in an axial direction of a rotating shaft of the rotating electrical machine is provided with a limiting portion for limiting a position of a coil wound on the winding portion.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to provide a rotating electric machine that can prevent coil collapse and achieve a reduction in size and an increase in power.

Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is a perspective view of an electric power steering motor 100 according to embodiment 1 of the present invention.

Fig. 2 is a side view showing the electric power steering motor 100 shown in fig. 1 cut in such a manner that the rotation shaft 5 is visible in a state of being housed in the case 1.

Fig. 3 is a plan view of the stator core 2 shown in fig. 1, as viewed from the axial direction of the rotating shaft of the motor 100.

Fig. 4 is a plan view of the stator 101 shown in fig. 1, as viewed from the axial direction of the rotating shaft of the motor 100.

Fig. 5 is a perspective view showing a state in which the coil 4 is wound around two adjacent cores among the plurality of divided cores 2a shown in fig. 1.

Fig. 6 is a view illustrating a state in which a coil is wound around one of the plurality of divided cores 2a shown in fig. 1.

Fig. 7 is a plan view of one of the bobbin assemblies 73 viewed from the direction a shown in fig. 5.

Fig. 8 is a diagram further illustrating the winding of the coil 4 on the bobbin 3 with reference to the bobbin assembly 73 shown in fig. 7.

Fig. 9 is an enlarged view of the vicinity of the slot 2e of the stator 101 shown in fig. 4.

Fig. 10 is a schematic side sectional view showing a case where the projection 46 has an inclined surface.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the drawings and the following description illustrate specific embodiments consistent with the principles of the invention, and are intended to be understood in the present context and not to limit the invention in any way.

The rotating electric machine according to the present invention will be described below by taking an electric power steering motor that assists steering of a vehicle as an example, but the present invention can be applied to other rotating electric machines as a matter of course.