JPH11299159A - Connecting ring of stator for motor and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the manufacturing work of a connecting ring efficiently, and to make it possible to effectively improve the yield. SOLUTION: A connecting ring 44a is manufactured in the following processes. First, a perpend reuler line is cut into pieces of a given length. Then, a ring 45a is formed by bending it to form a ring shape. The inside circumferential side of the ring 45a is partially cut out, and by bending those cutout parts in the direction of the center, connecting ends 47a are formed with each separated at a given angle. Then, by crushing the end parts of the ring 45a, a terminal part 46a is provided and a hole 49a is formed in this terminal part 46a.

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 plurality of stator cores each having a conductor wire wound thereon are housed integrally in a housing in a state of being connected to each other in an annular shape. The present invention relates to a connection ring of a motor stator for electrically connecting the conductive wires to each other and a method of manufacturing the same.

[0002]

2. Description of the Related Art Normally, a stator of a motor has a plurality of projections formed radially on an inner peripheral surface of a substantially cylindrical body, and a conductor is wound around grooves of the projections. However, it has been pointed out that the operation of winding the conductor is extremely complicated.

Therefore, for example, Japanese Patent Application Laid-Open No. Hei 7-163070
There is known a stator disclosed in Japanese Unexamined Patent Publication (Kokai) Publication. The stator includes a plurality of stator cores formed as a substantially T-shaped elastic body having a head and a leg, and the stator core has a recess at one end in a circumferential direction of the head, and A convex portion corresponding to the concave portion is formed in the portion, and the convex portion is fitted into a concave portion of another adjacent stator core and connected circumferentially to form a stator.

[0004] In the stator configured as described above, after the conductor wire is wound around the legs of the stator core, the stator cores are connected to each other by fitting the concave portions and the convex portions to each other in a circumferential shape. Next, the stator core is inserted into the housing in a state where it is fastened in the axial direction by the holding body, and the fastening force by the holding body is released. Crimp.

In this type of stator, a conductive wire (coil) wound around each stator core is electrically connected to a connection end projecting from the inner periphery of a connection ring (so-called bus plate) toward the center. Have been. For example, in a three-phase motor, three connection rings that are insulated from each other are used, and each connection ring is provided with a connection end that is connected to every third conductor wire of a stator core that is connected in a circumferential shape. Have been. The three connection rings are mounted on the stator so as to overlap each other with their connection ends connected to predetermined conductors.

[0006]

The above-mentioned connection ring is usually manufactured by stamping a metal plate. For this reason, it is pointed out that a large amount of discarded plate material is generated and the yield is extremely low.

SUMMARY OF THE INVENTION The present invention solves this kind of problem and efficiently performs the operation of manufacturing a connection ring.
An object of the present invention is to provide a motor stator connecting ring capable of effectively improving the yield and a method of manufacturing the same.

[0008]

According to the connecting ring for a motor stator and the method for manufacturing the same according to the present invention, a wire body is formed by bending a wire into a ring shape, while the wire is partially cut out. By bending the notch portion, a connection end connected to a conductor wound around the predetermined stator core is obtained. For this reason, compared with the conventional method of punching a connection ring from a plate material, the yield of the material is greatly improved, and it is extremely economical. In addition, since the connection ring is manufactured from the wire, the processing operation is effectively simplified, and the processing cost can be reduced.

Here, a terminal portion connected to the connector by performing a molding process is provided at an end portion of the wire, so that predetermined conductors are connected to each other, and other than the terminal portion, a general-purpose portion is provided. And can be easily applied to various motors. In addition, the wire is preliminarily provided with an insulating coating, so that there is no need to perform a coating process on the formed connection ring. Therefore, the manufacturing process of the connection ring can be simplified and the cost can be reduced.

[0010]

FIG. 1 is a schematic front view of a motor generator 10 to which a motor stator connection ring according to an embodiment of the present invention is applied, and FIG. 2 is a longitudinal sectional view of the motor generator 10. FIG.

The motor generator 10 is incorporated in, for example, a hybrid vehicle having an internal combustion engine that generates a driving force by burning gasoline. It has the function of assisting.

The motor generator 10 includes a circular rotor 12 fixed to a crankshaft 11 extending from an internal combustion engine (not shown), and a donut-shaped stator 14 mounted on the outer periphery of the rotor 12. A plurality of magnets 16 are provided on the outer periphery of the rotor 12 with N poles and S magnets.
The poles are arranged alternately.

The stator 14 includes a plurality of stator cores 18 arranged in the circumferential direction.
(Conducting wire) 22 wound around an outer peripheral portion of the stator core 1 via a guide member 20 having a substantially U-shaped cross section,
The stator cores 18 are connected to each other in an annular shape.
And a stator housing 26 for screw-fixing the cylindrical member 24.

The stator core 18 is formed by laminating a predetermined number of plates made of an iron-based material having the same shape and elasticity. As shown in FIGS. 1 and 3, the stator core 18 has a substantially T-shaped shape including a head 28 and a leg 30. A circular arc-shaped outer peripheral surface 32 is formed on the head 28 in contact with the inner peripheral surface 24a of the cylindrical member 24, and a convex portion 34 is formed at one end of the head 28 in the circumferential direction. At the other end, a concave portion 36 corresponding to the convex portion 34 is formed.

The cylindrical member 24 has a substantially ring shape made of an iron-based material. On one side surface 24b of the cylindrical member 24, a plurality of holes 38 for screwing the cylindrical member 24 to the stator housing 26 are formed.
The other side surface 24c of the cylindrical member 24 has a sensor mounting hole 4
0a to 40c are integrally provided by press molding.

As shown in FIG. 2, on the internal combustion engine side of the guide member 20, a circumferential groove portion 42 is formed along the outer peripheral side of the stator core 18, and the circumferential groove portion 42 includes three conductive grooves according to the present embodiment. Connection ring (bus plate) 44
a to 44c are mounted in an overlapping manner.

As shown in FIGS. 4 and 5, the connection rings 44a to 44c are formed by bending a copper wire into a ring shape, and the ring bodies 45a to 45c and the ring bodies 45a to 45c. It is provided with a plurality of connection ends 47a to 47c obtained by partially notching the circumferential side and bending the notched portion. The connection ends 47a to 47c are respectively connected to every two coils 22 wound around the stator core 18, and when the number of the coils 22 is 18, six at a predetermined angle. Are provided.

Both ends or one end of the ring main bodies 45a to 45c are subjected to a crushing process so that the terminal portions 46 are formed.
a to 46c are provided, and the terminal portions 46a to 46c are provided.
Holes 49a to 49c for bolt insertion are formed in c.
As shown in FIG. 1, terminal portions 46 a to 46 c protruding outward from the connection rings 44 a to 44 c are electrically connected to terminal plates 50 a to 50 c derived from a connector 48 provided on the stator housing 26. .

Coil 22 wound around stator core 18
Connection ring 51 to connect the center taps of
Is provided. The connection ring 51 is a ring body 5 obtained by bending a copper wire into a ring shape.
3 and a plurality of connection ends 55 obtained by partially cutting out the outer peripheral side of the ring main body 53 and bending the cutout outward. The 18 connection ends 55 are provided at predetermined intervals corresponding to the number of coils 22.

Sensor mounting holes 40a-40 of cylindrical member 24
Position detection sensors 52a to 52c for detecting the rotational position of the rotor 12 with respect to the stator 14 are mounted on c (see FIG. 2). A disc-shaped flywheel 56 is fixed to the rotor 12 via bolts 54, and a detection plate 60 is fixed to the flywheel 56 via bolts 58. This detection plate 60
Is formed with a hole 62 so as to face the position detection sensors 52a to 52c.

The flywheel 56 includes a clutch mechanism 64
Is composed. The clutch mechanism 64 is connected to a transmission 66 that switches a driving force and transmits the switching to a drive shaft (not shown).

The process of manufacturing the connecting ring 44a of the stator 14 in the motor generator 10 thus configured will be described below. In addition, connection ring 4
4b and 44c are manufactured similarly to the connection ring 44a, and the description of the manufacturing process is omitted.

First, for example, a copper rectangular wire (wire) having a width of 6 mm and a thickness of 1.6 mm is prepared. The rectangular wire is preliminarily coated with an enamel film, and after cutting the rectangular wire at predetermined lengths, the rectangular wire is bent into a ring to form a ring main body 45a.

Therefore, the inner peripheral side of the ring main body 45a is partially cut out, and the cutout portion is bent toward the center to form a plurality of connection ends 47a separated by a predetermined angle. Next, at least one end of the ring main body 45a is subjected to a crushing process to form a terminal portion 46a, and the terminal portion 46a is provided with a hole 49a.
Is formed. The connection end 47a and the terminal 46a
Is subjected to a treatment for removing the enamel coating.

On the other hand, the connection ring 51 is
It is manufactured in substantially the same manner as described above, and will be briefly described below. First, for example, the width is 4 mm and the thickness is 1. mm.
A copper flat wire (wire) coated with a 6 mm enamel coating is prepared. After this rectangular wire is cut at predetermined lengths, it is bent into a ring shape to form the ring main body 53. Next, the outer peripheral side of the ring main body 53 is partially cut out, and the cutout portion is bent outward in a radial direction to form a plurality of connection ends 55 separated by a predetermined angle.

Then, as shown in FIG. 6, the plurality of stator cores 18 provided with the coils 22 are integrally press-fitted into the cylindrical member 24 in a state of being connected in a ring shape.
Further, on the internal combustion engine side of the guide member 20, connection rings 44 a to 44 c are mounted so as to overlap with the orbital groove portion 42 along the outer peripheral side of the stator core 18, and the inner peripheral side of the stator core 18 of the guide member 20. The connection ring 51 is mounted along (see FIG. 7).

In this case, in the present embodiment, after the rectangular wire is cut into predetermined lengths and then bent into a ring shape, the ring bodies 45a to 45c are formed, while the ring bodies 45a to 45c are formed. A plurality of connection ends 47a-4 are formed by partially notching and bending the inner peripheral side.
7c is formed. Next, the end portions of the ring main bodies 45a to 45c are subjected to a crushing process to thereby form the terminal portions 46a.
To 46c are provided.

Therefore, as compared with the conventional method of punching a connection ring from a copper plate, the yield of the material is greatly improved, and the effect of being extremely economical can be obtained. Moreover, since the connection rings 44a to 44c are manufactured from the flat wire, the processing operation is effectively simplified, and the processing cost can be reduced.

Further, the rectangular wire is previously coated with an enamel coating which is an insulating coating.
The work of performing the coating process on the a to 44c becomes unnecessary. Therefore, there is an advantage that the manufacturing process of the connection rings 44a to 44c can be simplified and the cost can be effectively reduced.

In the connection rings 44a to 44c, the terminal portions 46a to 46c are specially formed portions, and the ring main bodies 45a to 45c are general-purpose portions, so that it is possible to easily cope with various stator structures. This has the effect of being excellent in versatility.

Further, in the present embodiment, the description has been made using the motor generator 10 incorporated in the hybrid vehicle. However, the present invention is not limited to this, and can be applied to motors having various structures.

[0032]

According to the connecting ring of the stator for a motor and the method of manufacturing the same according to the present invention, the wire is bent into a ring shape to obtain a ring main body, while the wire is partially cut out and the notch is formed. The portion is bent to form a connection end which is connected to a conductor wound around the predetermined stator core. For this reason, compared with the conventional method of punching a connection ring from a plate material, the yield of the material is greatly improved, and it is extremely economical. In addition, since the connection ring is manufactured from the wire, the processing operation is effectively simplified, and the processing cost can be reduced. This allows the connecting ring to be manufactured efficiently and economically.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a motor generator in which a connection ring of a motor stator according to an embodiment of the present invention is incorporated.

FIG. 2 is an explanatory longitudinal sectional view of the motor generator.

FIG. 3 is an exploded perspective view of a stator constituting the motor generator.

FIG. 4 is an explanatory perspective view of the connection ring.

FIG. 5 is an explanatory plan view of the connection ring.

FIG. 6 is an explanatory perspective view of a state where the stator core is pressed into the cylindrical member.

FIG. 7 is an explanatory perspective view of a state where a connection ring is assembled to the stator core.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motor generator 12 ... Rotor 14 ... Stator 18 ... Stator core 20 ... Guide member 22 ... Coil 24 ... Cylindrical member 26 ... Stator housing 44a-44c, 51 ... Connection ring 45a-45c,
53 ... Ring body 46a-46c ... Terminal parts 47a-47c,
55 ... connection end

Claims (5)

[Claims] 1. A motor stator in which a plurality of stator cores each having a conductive wire wound thereon are integrally housed in a housing in a state of being connected to each other in an annular shape, wherein the conductive wires wound around a predetermined stator core are electrically connected to each other. A ring body obtained by bending a wire into a ring shape, and partially cutting out the wire, and being obtained by bending the cutout portion. A connection end connected to the conductive wire wound around the predetermined stator core, and a connection ring for a motor stator. 2. The connection ring for a motor stator according to claim 1, wherein a terminal portion connected to the connector by performing a molding process is provided at an end of the wire. 3. A stator for a motor in which a plurality of stator cores each wound with a conductive wire are housed integrally in a housing in a state of being connected to each other in an annular shape, wherein the conductive wires wound around a predetermined stator core are electrically connected to each other. A method of manufacturing a connection ring for connecting a wire to a ring body by bending the wire into a ring shape, forming a ring body, and partially notching the wire, and bending the notch. Forming a connection end connected to the conductor wound around the predetermined stator core by performing the method. A method for manufacturing a connection ring of a stator for a motor, comprising: 4. The method according to claim 3, wherein the wire is preliminarily coated with an insulating coating. 5. A method according to claim 3, wherein a terminal portion connected to a connector is formed by subjecting an end of said wire to a molding process.