JPH09163654A - Stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for motor which can prevent, by simple constitution, imperfect insulation which is to be caused by that crossover lines come into contact with each other in an intersecting part and rub together. SOLUTION: A crossover line positioned at slit-shaped notch 8 (9 or 10) side, out of intersecting crossover lines 2a3, 3a3 (4a3, 2a3 or 3a3, 4a3), is arranged in the slit-shaped notch 8 (9 or 10). Other crossover line out of intersecting crossover lines 2a3, 3a3 (4a3, 2a3 or 3a3, 4a3) is anchored with an anchor protrusion part 6a (6c or 6e). The respective intersecting crossover lines 2a3, 3a3 (4a3, 2a3 or 3a3, 4a3) are maintained in a mutually isolated state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator in which a connecting wire between windings of a plurality of teeth provided on a stator core does not come into contact with connecting wires or windings of other phases. Is.

[0002]

2. Description of the Related Art FIG. 7 shows a stator of an inner rotor type three-phase brushless motor. This stator includes a stator core 1 and Y used for the stator core 1.
It has lead wires 2, 3, 4 for coils for connection (see FIG. 10).

As shown in FIGS. 7 to 9, the stator core 1 includes a tubular portion 5 and a plurality of tooth portions 5a to 5f which are provided on the inner surface of the tubular portion 5 at circumferentially spaced intervals. , Each tooth 5a
5f to 5f, and has locking projections 6a to 6f that are projected from the end surface of the tubular portion 5 in this order.

The tooth portions 5a to 5f are provided at intervals of 60 ° in the circumferential direction. The tooth portions 5a and 5d, the tooth portion 5b,
5e and the tooth portions 5c and 5f are opposed to each other.

Windings 2a1 and 2a2 (coil portions) of the coil lead wire 2 are wound around the facing tooth portions 5a and 5d, respectively, and windings 3a1 of the coil lead wire 3 are wound around the facing tooth portions 5b and 5e. , 3a2 (coil part) are wound respectively, and windings 4a1, 4a1,
4a2 (coil part) is wound.

In addition, the windings 2a1 and 2a2, the windings 3a1 and 3a2, and the windings 4a1 and 4a2 arranged with the two windings thus arranged are connected to each other by connecting wires 2a3, 3a3 and 4 respectively.
It is connected to every other two by a3. Therefore, winding 2
a1, 2a2, windings 3a1, 3a2, and winding 4a
The currents flowing through 1, 4a2 (or the windings 2a1, 2a2, the windings 3a1, 3a2, and the voltages applied to the windings 4a1, 4a2) are in phase with each other. Moreover, at this time, the phases of the voltage (or current) of the windings 2a1 and 2a2, the windings 3a1 and 3a2, and the windings 4a1 and 4a2 are shifted by 120 °.

[0007] Further, each crossover line 2a3, 3a3, crossover line 2a
3, 4a3 and crossovers 3a3, 4a3 are locking projections 6a, 6
It is locked in the state of intersecting with c and 6e respectively, and the crossover 2
a3 is arranged on the windings 3a1 and 4a1, the connecting wire 3a3 is arranged on the windings 4a2 and 2a1, and the connecting wire 4a3 is formed on the winding 2a.
It is arranged on 2, 3a2.

[0008]

However, the crossovers 2a3, 3a3, the crossovers 2a3, 4a3, and the crossover 3a are to be solved.
3, 4a3 contact the locking projections 6a, 6c, 6e at their intersections, the crossover 2a3 contacts the windings 3a1, 4a1, the crossover 3a3 contacts the windings 4a2, 2a1,
Since the crossover 4a3 is in contact with the windings 2a2 and 3a2, if the crossing portions or contact portions rub against each other due to vibration during motor operation and the insulating layer of the conducting wire becomes thin, insulation at the crossing portions or contact portions will be poor. There was a problem that it would be enough.

As a method of avoiding such a problem, there is a method of fixing each intersection or contact portion with a varnish or tightening and fixing with a string or a band, but this requires a lot of labor and a high cost. There was a problem of becoming.

Therefore, a first object of the present invention is to provide a stator for a motor, which can surely prevent insulation failure due to contact between the crossover wires and rubbing at the crossing portions and rubbing with a simple structure.

A second object of the present invention is to provide a stator for a motor, which can prevent insulation failure due to contact between the crossover wire and the windings of other phases and rubbing with a simple structure. is there.

[0012]

In order to achieve the first object of the present invention, a first aspect of the present invention is to provide a cylindrical portion and a plurality of projections provided on an inner surface of the cylindrical portion at circumferential intervals. Stator core having tooth portions, windings wound around the plurality of tooth portions, and a plurality of crossover wires in which every other one of the plurality of windings or every other plurality of windings are connected to each other to be in phase with each other. In the stator for a motor, wherein the plurality of crossover wires are arranged such that adjacent ones of the plurality of windings have mutually different phases,
It is characterized in that the stator for a motor is provided with an intersecting portion separating means for keeping the portions where the plurality of crossovers intersect with each other in a state of being separated from each other.

The invention according to claim 2 is, in claim 1, according to claim 1, wherein a slit-shaped notch formed in the tubular portion and opening at an end face of the tubular portion corresponding to an intersection of the connecting lines, The intersecting portion separating means is composed of a locking projection protruding from the end face and provided adjacent to the slit-shaped notch, and is located on the slit-shaped notch side of the intersecting connecting lines. One is disposed in the slit-shaped notch, the other crossing crossover is locked to the locking projection, and the crossing crossovers are maintained in a state of being separated from each other. It is characterized by

Further, in order to achieve the above-mentioned second object, the invention of claim 3 provides a cylindrical portion and a plurality of teeth projecting from the inner surface of the cylindrical portion at intervals in the circumferential direction. A stator core having a portion, a winding wound around the plurality of tooth portions, and a plurality of crossover wires in which every other one or a plurality of the plurality of windings are connected to each other and are in phase with each other. In the motor stator, wherein the plurality of crossover wires make adjacent ones of the plurality of windings different in phase from each other,
The motor stator is provided with a crossover separating means for maintaining the crossover and the other windings between the windings connected by the crossover in a mutually separated state.

According to a fourth aspect of the present invention, in the third aspect, the inner peripheral wall forming the annular groove is provided as the connecting line separating means by forming an annular groove opening at the end face in the cylindrical portion. A slit-shaped notch opening to the end face is formed on the inner peripheral wall corresponding to the intersection of the crossovers, and a locking protrusion protruding from the end face is provided adjacent to the slit-shaped notch, Of the intersecting crossovers, those located on the slit-shaped notch side are arranged in the slit-like notch, and other crossing crossovers are locked to the locking projections, Each crossover wire is disposed in the annular groove at a portion other than a crossing portion of the crossover wire, and the crossover wire and other windings between windings connected by the crossover wire are separated from each other. It is characterized by being maintained.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows a stator of an inner rotor type three-phase brushless motor. This stator is
The stator core 1 and the Y-connection coil conductors 2, 3, and 4 (see FIG. 4) used for the stator core 1 are provided.

As shown in FIGS. 1, 2 and 5, the stator core 1 includes a tubular portion 5 and a plurality of tooth portions provided on the inner surface of the tubular portion 5 so as to project at intervals in the circumferential direction. 5a to 5f and pin-shaped locking projections 6a to 6f that are located between the teeth 5a to 5f and are projected from the end surface 5g of the tubular portion 5 in this order. The tooth portions 5a to 5f are provided at intervals of 60 ° in the circumferential direction, and the tooth portions 5a and 5d, the tooth portions 5b and 5e, and the tooth portions 5c and 5f are opposed to each other. The locking projections 6a to 6f are provided by fixing pins arranged parallel to the center line of the tubular portion 5 to the inner surface of the tubular portion 5 at 60 ° intervals.

An annular groove 7 is formed at one end of the cylindrical portion 5 so as to extend annularly in the circumferential direction and open to the end face 5g, and an inner peripheral wall 7a (crossover line) forming the annular groove 7 is formed. A separating means) and an outer peripheral wall 7b are provided. Moreover,
The inner peripheral wall 7a is formed with slit-shaped notches 8, 9, 10 which are adjacent to the locking projections 6a, 6c, 6e and open to the end face 5g. The locking projection 6a and the slit-shaped cutout 8, the locking projection 6c and the slit-shaped cutout 9, and the locking projection 6e and the slit-shaped cutout 10 respectively constitute an intersection separating means.

Windings 2a1 and 2a2 (coil portions) of the coil lead wire 2 are wound around the above-mentioned facing tooth portions 5a and 5d, respectively, and windings of the coil lead wire 3 are wound around the facing tooth portions 5b and 5e. 3a1 and 3a2 (coil portions) are respectively wound, and windings 4a of the coil conductor wire 4 are provided on the facing tooth portions 5c and 5f.
1, 4a2 (coil part) are respectively wound.

Moreover, the windings 2a1 and 2a2, the windings 3a1 and 3a2, and the windings 4a1 and 4a2 arranged with the two windings thus arranged are connected to each other by connecting wires 2a3, 3a3 and 4 respectively.
It is connected to every other two by a3. Therefore, winding 2
a1, 2a2, windings 3a1, 3a2, and winding 4a
The currents flowing through 1, 4a2 (or the windings 2a1, 2a2, the windings 3a1, 3a2, and the voltages applied to the windings 4a1, 4a2) are in phase with each other. Moreover, at this time, the phases of the voltage (or current) of the windings 2a1 and 2a2, the windings 3a1 and 3a2, and the windings 4a1 and 4a2 are shifted by 120 °.

At the intersection of the above-mentioned crossovers 2a3, 3a3, the crossover 2a3 is arranged in the slit-shaped notch 8, and the crossover 3a3 is locked by the locking projection 6a. Further, the crossover 2a3 is disposed in the slit-shaped notch 9 at the intersection of the crossovers 2a3 and 4a3, and the crossover 4a3 is engaged with the locking projection 6.
c. Further, the crossover 3a3 is arranged in the slit-shaped notch 10 at the intersection of the crossovers 3a3 and 4a3, and the crossover 4a3 is locked to the locking projection 6e.

Moreover, each connecting wire 2a3, 3a3, 4a3
Are arranged in the annular groove 7 at a portion slightly apart from the intersection. As a result, the inner peripheral wall 7b keeps the connecting wire 2a3 and the windings 3a1 and 4a1, the connecting wire 3a3 and the windings 4a2 and 2a1, and the connecting wire 4a3 and the windings 2a2 and 3a2 separated from each other. .

In the embodiment described above, the slit-shaped notches 8, 9, 10 and the locking projections 6a, 6c, 6e are used to connect the crossovers 2a3, 3a3, the crossovers 2a3, 4a3 and the crossover 3a.
Although an example is shown in which 3,4a3 is prevented from directly contacting each other at the intersection, the present invention is not limited to this.

For example, as shown in FIG. 6, two notches 11 and 12 opened to the end face are provided on the respective locking projections 6a and 6a.
c and 6e are formed in a cross shape, respectively, and cut 11,
By arranging the crossovers 2a3, 3a3, the crossovers 2a3, 4a3 and the crossovers 3a3, 4a3 on 12, respectively, the crossovers 2a3, 3a3, the crossovers 2a3, 4a3 and the crossover 3a
It may be possible to prevent the 3, 4a 3 from directly contacting each other at the intersection.

[0026]

As described above, according to the invention of claim 1, a stator core having a tubular portion and a plurality of tooth portions projecting from the inner surface of the tubular portion at intervals in the circumferential direction,
A plurality of windings wound around the plurality of tooth portions; and a plurality of crossover wires that connect every other one or a plurality of the plurality of windings to each other so as to be in phase with each other, In a stator for a motor in which a wire has a plurality of adjacent windings in different phases, a crossing part spacing means is provided for maintaining the part where the plurality of crossing wires intersect with each other in a mutually separated state. Since the configuration is adopted, it is possible to prevent the insulation failure due to contact between the crossovers and rubbing at the crossing portion and rubbing with each other with a simple configuration.

The invention according to claim 2 is, in claim 1, according to claim 1, wherein a slit-like notch formed in the tubular portion and opening to an end face of the tubular portion at a crossing portion of the connecting lines, The intersecting portion separating means is composed of a locking projection protruding from the end face and provided adjacent to the slit-shaped notch, and is located on the slit-shaped notch side of the intersecting connecting lines. A structure in which an object is arranged in the slit-shaped notch, another object of the crossing crossover is locked to the locking projection, and the crossing crossovers are kept separated from each other. Therefore, it is possible to prevent the insulation failure due to the contact and rubbing of the crossovers at the intersections with a simple configuration, and it is possible to easily perform the wiring of the crossovers.

Further, in the invention of claim 3, a stator core having a tubular portion and a plurality of tooth portions projecting from the inner surface of the tubular portion at intervals in the circumferential direction, and the plurality of tooth portions. A plurality of windings, and a plurality of crossovers that connect every other one or a plurality of the plurality of windings to each other so as to be in phase with each other, and the plurality of crossovers have a plurality of windings. In a motor stator in which adjacent ones of the coils have different phases from each other, the crossover wire maintains the crossover wire and other windings between the windings connected by the crossover wire in a mutually separated state. Since the separating means is provided, it is possible to prevent the crossover from coming into contact with the windings of other phases and rubbing them to cause insulation failure with a simple configuration.

According to a fourth aspect of the present invention, in the third aspect, an annular groove having an end face is formed in the cylindrical portion, and an inner peripheral wall forming the annular groove is provided as the connecting line separating means. A slit-shaped notch that opens to the end face is formed on the inner peripheral wall corresponding to the intersection of the crossovers, and a locking protrusion protruding from the end face is provided adjacent to the slit-shaped notch, Of the crossing crossovers, those located on the slit-shaped notch side are arranged in the slit-shaped notch, and other crossing crossovers are locked to the locking projections, The crossover wires are arranged in the annular groove at portions other than intersections thereof, and the crossover wires and other windings between windings connected by the crossover wires are separated from each other. Since the configuration is maintained, the crossovers Can be prevented with a simple structure to become defective insulation by rubbing contact in part, the wiring connecting wire can be easily performed.

In addition, it is possible to prevent insulation failure due to contact between the crossover wire and the winding of another phase and rubbing, and most of the crossover wire is provided in the annular groove. As a result, the crossover wire is not inadvertently gripped when handling the stator core. With these configurations,
It is easy to automate wiring such as windings and crossovers.

[Brief description of the drawings]

FIG. 1 is a plan view of a motor stator according to the present invention.

2A is a partially enlarged view of FIG. 1, and FIG. 2B is an explanatory view of FIG. 2A viewed from the direction of arrow A.

FIG. 3 is a perspective view of the portion shown in FIG.

4 (a) is an explanatory view of a Y connection of the motor stator shown in FIG. 1, and FIG. 4 (b) is a development explanatory view showing a relationship between each winding of FIG.

5 (a) is a plan view of the stator core shown in FIG. 1, (b).
FIG. 3A is a side view of (a), and (c) is a bottom view of (b).

FIG. 6 is a perspective view of a main part showing another example of the present invention.

FIG. 7 is a plan view of a conventional motor stator.

FIG. 8 is a plan view of the stator core of FIG.

9A is a partially enlarged view of FIG. 7, and FIG. 9B is an explanatory view of FIG.

10A is an explanatory view of a Y connection of the motor stator shown in FIG. 7, and FIG. 10B is a development explanatory view showing a relationship between each winding of FIG.

[Description of Reference Signs] 1 ... Stator core 2, 3, 4 ... Conductor wire for coil 2a1, 2a2, 3a1, 3a2, 3a1, 3a2 ... Winding wire 2a3, 3a3, 4a3 ... Crossover wire 5 ... Cylindrical portion 6a-6f ... Locking Projection (part of crossing part separating means) 7 ... Annular groove 7a ... Inner peripheral wall (crossover separating part) 7b ... Outer peripheral wall 8, 9, 10 ... Slit-like notch (part of crossing part separating part) 11, 12 … Notches (intersection separating means)

Claims (4)

[Claims] 1. A stator core having a tubular portion and a plurality of tooth portions projecting from the inner surface of the tubular portion at intervals in the circumferential direction, and a winding wound around the plurality of tooth portions. , A plurality of crossovers that connect every other one of the plurality of windings or ones of the plurality of windings that are in phase with each other so as to be in phase with each other. A motor stator having different phases, wherein a crossing portion spacing means is provided for maintaining the portions where the plurality of crossovers intersect with each other in a mutually separated state. 2. A slit-shaped notch formed in the tubular portion and opening to an end face of the tubular portion corresponding to an intersection of the crossovers, and a slit-shaped notch that protrudes from the end face and is adjacent to the slit-shaped notch. The engaging portion is provided with the intersecting portion separating means, and the one that is located on the slit-shaped notch side among the intersecting crossovers is disposed in the slit-shaped notch, 2. The motor according to claim 1, wherein the other crossing crossover wire is locked to the locking projection so that the crossing crossover wires are kept apart from each other. For stator. 3. A stator core having a tubular portion and a plurality of tooth portions projecting from the inner surface of the tubular portion at intervals in the circumferential direction, and a winding wound around the plurality of tooth portions. , A plurality of crossovers that connect every other one of the plurality of windings or ones of the plurality of windings that are in phase with each other so as to be in phase with each other. In the motor stator configured to have different phases, crossover wire spacing means for maintaining the crossover wire and other windings between the windings connected by the crossover wire in a state of being separated from each other is provided. Characteristic motor stator. 4. An inner peripheral wall forming the annular groove is provided as the connecting line separating means by forming an annular groove opening at an end face in the cylindrical portion, and the inner peripheral wall corresponding to an intersection of the connecting lines. A slit-shaped notch that opens to the end face is formed on the inner peripheral wall, and a locking protrusion that protrudes from the end face is provided adjacent to the slit-shaped notch, and the slit-shaped notch side of the intersecting crossovers. What is located is arranged in the slit-shaped notch, and the other crossing crossover wire is locked to the locking projection, and each crossover wire is a part other than the crossing part of each other. Is arranged in the annular groove, and the crossover wire and other windings between the windings connected by the crossover wire are maintained in a state of being separated from each other. The stator for the motor according to.