JP2001095187A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor provided with an armature iron core which can be precisely wound with an armature winding without oscillating the armature winding. SOLUTION: When a first turn 40a of an armature winding is wound around a most upper part D1 of a slant face 31a, the armature winding 40a slips down to a most lower part D4 of the slant face 31a and adheres closely to an inner wall 35a of a side plate 35 and the slant face 31a. Then, when a second turn 40b of the armature winding is wound around the most upper part D1, the armature winding 40b slips down to a second lower part D3, one step higher than the most lower part D4, and adheres closely to the first turn 40a of the armature winding and the slant face 31a. A third turn 40c and a fourth turn 40d of the armature winding are wound in like manner. As a result, the first to fourth turns 40a-40d of the armature winding are wound from the most upper part D1 to the most lower part D4, adhering closely to each other with no space nor overlapping between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having an armature core, and more particularly to a motor having an armature winding wound around an armature core with high accuracy.

[0002]

2. Description of the Related Art Conventionally, as an armature core, a split laminated core divided into a plurality of pieces in a rotation direction is known. FIG.
FIG. 3A is an explanatory plan view of the armature core viewed from the rotation axis direction. FIG. 3B is a plan view of the divided laminated cores constituting the armature core shown in FIG. It is the explanatory view of the outer surface seen along. FIG. 4 is a cross-sectional view in which an armature winding is wound around the split laminated core shown in FIG. 3 in a direction orthogonal to the rotation axis. FIG. 5 is an explanatory diagram showing a winding device for winding an armature winding around a divided laminated core. As shown in FIG. 3A, the armature core 60 is configured by a divided laminated core 50 divided into a plurality in the rotation direction. As shown in FIG. 3B, the divided laminated core 50 includes a plurality of core pieces 5.
1, and an armature winding 53 is wound around the slot 52 a plurality of times, as shown in FIG.

In the winding step of the armature winding 53, FIG.
The winding device 70 shown in FIG. Winding device 70
Are a servomotor 71, a rotary shaft 74 connected to a rotary shaft 72 of the servomotor 71 via a clutch 73, and a bearing 75 for supporting the rotary shaft 74.
And a base 76 to which the bearing 75 is fixed.
The winding device 70 is attached to the tip of a rotating shaft 74 protruding from the base 76, and
0, a mounting jig 77 for detachably mounting 0, three tension rollers 78 for applying tension to the armature winding 53 wound on a reel (not shown), and a direction indicated by an arrow F1 via the tension rollers 78. Swinging device 8 for swinging armature winding 53 in the direction shown by arrow F2 by holding member 79 for inserting and holding armature winding 53 sent out to
0. Then, when the servo motor 71 rotates, the divided laminated core 50 mounted on the mounting jig 77 rotates, and the armature winding 53 is wound on both side surfaces and both end surfaces of the divided laminated core 50. At this time, since the swing member 79 attached to the swing device 80 swings in the direction of the arrow F2, the armature winding 53 reciprocates on both side surfaces and both end surfaces of the divided laminated core 50 in the width direction. , And as shown in FIG. Note that the split laminated core 50
A resin end form 54 is provided at both ends in the longitudinal direction.
Are formed respectively. In addition, the armature core 60
A method of welding split laminated cores 50 adjacent to each other,
Alternatively, it is manufactured by a method of fixing by resin molding or the like.

[0004]

However, even when the method of winding the armature winding 53 around the divided laminated core 50 using the winding device 70 is used, the armature winding 53 is not In some cases, winding could not be performed to the depth of the slot 52, or a gap was generated between the armature windings 53. That is,
It was difficult to increase the winding accuracy of the armature winding 53. Further, since the winding device 70 includes the swing device 80, there is also a problem that the cost is increased.

Therefore, the present invention has been made to solve the above-mentioned problem, and when winding an armature winding around an armature core, the armature winding does not have to swing. It is an object of the present invention to provide a motor having an armature core capable of winding an armature winding with high accuracy.

[0006]

Means for Solving the Problems, Functions and Effects of the Invention
In order to achieve the above object, according to the first aspect of the present invention, an electric machine in which, in a portion around which an armature winding is wound, both end faces in a longitudinal direction are respectively inclined in a direction intersecting a rotation axis. The technical means of having an iron core is used.

In other words, when winding the armature winding around the armature core, if the winding is started from a high position on the inclined end surfaces, the armature winding slides down to a low position along the inclined surface. Similarly, the armature winding to be wound next slides down along the inclined surface in the same manner, and comes into close contact with the armature winding wound last time. Or later,
Similarly, by repeating the winding a predetermined number of times, the armature windings can be automatically aligned from one end of the both end surfaces to the other end without any gap and without overlapping irregularly. Therefore, the armature winding can be accurately wound around the armature core without swinging the armature winding at the time of winding as in the related art.

According to the second aspect of the present invention, members formed of an insulating material are attached to both ends of the armature core in the longitudinal direction, and the longitudinal end faces of the members are respectively rotated. The technical means of being inclined in a direction crossing the axis is used.

That is, when winding the armature winding around the armature core from the high position of the inclined end face of the above member, the armature winding slides to a low position along the inclined surface. The armature winding to be wound next also slides down along the inclined surface in the same manner, and comes into close contact with the previously wound armature winding. Thereafter, similarly, by repeating the winding a predetermined number of times, the armature winding can be automatically aligned from one end of the both end surfaces to the other end without any gap and without overlapping irregularly. it can. Therefore, the armature winding can be accurately wound around the armature core without swinging the armature winding at the time of winding as in the related art. In particular, since the above-mentioned member is formed of an insulating material, the effect of insulating the armature core and the armature winding can also be obtained.

According to a third aspect of the present invention, in the motor according to the first or second aspect, a technical means that the winding is a single winding is used. That is, when it is necessary to wind only one armature winding around the armature core, if a part of the armature winding becomes double, the winding must be restarted from the beginning, but as described above, Each time the armature winding is wound, the armature winding slides down on the inclined surface and comes into close contact with the armature winding wound last time, so that a part of the armature winding can be prevented from being doubled. For example, as described in an embodiment of the invention described below, in the case of a DC brushless motor used in an electric power steering device (EPS) provided in a vehicle such as an automobile, the power supply is as low as 12 V, for example. Voltage
Since a large current cannot be passed through the armature winding, the resistance of the armature winding increases when winding a small-diameter armature winding like other DC brushless motors. The resistance is prevented from increasing by winding only a single thick armature winding. Therefore, when only one armature winding is wound around the armature core of such a DC brushless motor, a part of the armature winding is doubled by using the invention according to claim 1 or 2. In addition, single winding can be reliably performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, an electric power steering device (EP) provided in a vehicle such as an automobile is used as the motor according to the embodiment of the present invention.
The DC brushless motor used in S) will be described as an example. FIG. 1A shows a divided laminated core 10 constituting an armature core provided in the DC brushless motor according to this embodiment, and an iron core piece 11 constituting the divided laminated core 10.
And caps 2 attached to both ends of the split laminated core 10
FIG. 1B is an explanatory diagram showing 0 and 30. FIG.
It is an explanatory view showing the state where caps 20 and 30 were attached to armature iron core 10 shown in (A), and armature winding 40 was wound. FIG. 2A is a cross-sectional view showing a part of the cross section taken along the line AA in FIG. 1B, and FIG.
It is BB arrow sectional drawing of (B).

[Structure of Armature Iron Core] The armature iron core provided in the DC brushless motor according to this embodiment is shown in FIG.
And as shown in FIG. 4, the laminated cores divided into a plurality in the circumferential direction are joined to each other. FIG.
As shown in (A), the split laminated core 10 has a plane substantially T
A plurality of iron core pieces 11 formed in a letter shape are laminated. Slots 12, 12 around which the armature winding 40 (FIG. 2) is wound are formed on opposing side surfaces along the longitudinal direction of the divided laminated core 10. The cap 30 attached to the right end of the split laminated core 10 on the drawing is an armature winding 40
The main body 31 is provided with fitting pieces 32 and 33 that fit into two fitting holes (not shown) formed at the right end of the divided laminated core 10 in the drawing. Are formed to protrude. Further, substantially plate-like side plates 34 and 35 are formed on both side surfaces of the main body 31. Side plates 34, 35
As shown in FIG. 2A, the role of preventing the armature winding 40 wound around the main body 31 from coming off the main body 31 when the armature winding 40 is wound around the divided laminated core 10. Having. As shown in FIG. 2A, an axis P2 parallel to the rotation axis P1 (see FIG. 3) of the motor is provided at the right end of the main body 31 in the drawing.
An inclined surface 31a inclined toward is formed. When the right end in FIG. 1A of the divided laminated core 10 is the lower end in FIG. 3B, the inclined surface 31a is
The gradient becomes upward toward the axis P2.

[0013] Engagement holes 11b, 11 for engaging the cap 20 are formed in the core piece 11a on the left end of the divided laminated iron core 10.
The cap 20 has a projection (not shown) formed at the right end of the cap 20 to engage with the engagement holes 11b and 11c, respectively. The cap 20 includes a substantially triangular prism-shaped main body 21 around which the armature winding 40 is wound. On both sides of the main body 21, a substantially plate-shaped side plate 22,
23 are formed. The side plates 22 and 23 are
It has the same role as the side plates 34 and 35 formed at zero.
An inclined surface 21a is formed at the left end of the main body 21 in the drawing. Like the inclined surface 31a formed on the cap 30, the inclined surface 21a is also inclined toward an axis P2 parallel to the rotation axis P1 of the motor. When the left end of the divided laminated core 10 in FIG. 1A is the upper end in FIG. 3B, the inclined surface 31a has a downward slope from the axis P2. In this embodiment, the caps 20 and 30 are
Each is formed of an insulating material, for example, a synthetic resin.

[Winding of Armature Winding] In the step of winding the armature winding 40 on the divided laminated core 50 having the above-described structure, for example, the swing device 80 shown in FIG. Use the omitted one. The first turn armature winding 40a is connected to the uppermost part D1 of the slope 31a (FIG. 2).
(A)), since the armature winding 40a is tensioned by each tension roller 78 (FIG. 5), it slides down to the lowermost part D4 of the inclined surface 31a, and the inner wall 35a of the side plate 35 And the inclined surface 31a. When the armature winding 40b of the second turn is similarly wound around the uppermost portion D1, a portion D3 which is immediately above the lowermost portion D4 is formed.
And is brought into close contact with the armature winding 40a wound on the first turn and the inclined surface 31a. Similarly, the armature winding 40c wound on the third turn is in close contact with the armature winding 40b wound on the second turn and the inclined surface 31a, and the armature winding 40d wound on the fourth turn The armature winding 40c wound on the third turn and the inclined surface 31a are in close contact with each other, and as shown in FIG. 40d is the inclined surface 3
The upper portion D1a is wound around the uppermost portion D1 to the lowermost portion D4 without any gap and without any overlap. The armature winding 40 is wound on the inclined surface 21a of the cap 20 in the same manner as on the inclined surface 31a.

As described above, if the DC brushless motor of this embodiment is used, the ends of the caps 20 and 30 attached to both ends of the divided laminated iron core 10 in the longitudinal direction, respectively, with respect to the rotation direction of the motor. Because the armature winding 40 is sloping, the armature winding 40 slides down from the uppermost portion D1 to the lowermost portion D4 of the inclined surface when the armature winding 40 is wound. The armature winding 40 can be accurately wound around the divided laminated core 10 without swinging the wire 40. In particular, electric power steering devices (EP
When only a single thick armature winding is wound, such as a DC brushless motor used in S), partial overlap is not allowed, but the above-described split laminated core 50 is applied. As a result, the armature windings can be wound in an aligned manner so as not to cause a part of overlap, so that the manufacturing efficiency in the step of winding the armature windings can be improved. Further, since the inclined surfaces 21a and 31a are each formed of a synthetic resin and have low friction, the armature winding 40
Can easily slide down on the inclined surface.

Further, the inclined surfaces 21a and 31a are
It can also be formed in a waveform as shown in FIG. In this case, in order to improve the sliding of the armature winding 40 on the inclined surface, a waveform having a small step is desirable. If this inclined surface is used, the armature winding 40 can be positioned with high accuracy. Further, in the above-described embodiment, a DC brushless motor used in an electric power steering device (EPS) provided in a vehicle such as an automobile has been described as an example of the motor according to the present invention. Of course, it can be applied to other motors such as a brushless motor or a stepping motor. Incidentally, the split laminated core 10 corresponds to the armature core of the present invention, and the cap 2
0 and 30 correspond to the members, and the inclined surfaces 21a and 31a correspond to the end surfaces.

[Brief description of the drawings]

FIG. 1A shows a DC according to an embodiment of the present invention.
FIG. 1B is an explanatory view showing a divided laminated core constituting an armature core, a core piece constituting a divided laminated core, and caps attached to both ends of the divided laminated core provided in the brushless motor, and FIG. FIG. 2 is an explanatory view showing a state in which a cap is attached to the armature core shown in FIG.

FIG. 2A is a cross-sectional view showing a part of a cross section taken along line AA of FIG. 1B, and FIG. 2B is a cross-sectional view of FIG.
FIG. 2B is a cross-sectional view taken along the line BB of FIG. 2B, and FIG. 2C is an explanatory diagram illustrating a modified example of the inclined surfaces 21a and 31a.

3A is an explanatory plan view of the armature core viewed from a rotation axis direction, and FIG. 3B is a diagram illustrating a split lamination constituting the armature core shown in FIG. 3A; FIG. 3 is an outer surface explanatory view of the iron core viewed along the rotation axis direction.

FIG. 4 is a cross-sectional view in which an armature winding is wound around the divided laminated core shown in FIG. 3 and cut in a direction orthogonal to a rotation axis.

FIG. 5 is an explanatory view showing a conventional winding device for winding an armature winding around a divided laminated core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Split laminated core (armature core) 12 Slot 20, 30 Cap (member) 21a, 31a Inclined surface (end surface) 40 Armature winding

Claims (3)

[Claims] 1. A motor comprising an armature core in which both end faces in a longitudinal direction of a portion where an armature winding is wound are inclined in a direction intersecting a rotation axis. 2. A member formed of an insulating material is attached to each of both ends in the longitudinal direction of the armature core, and the longitudinal end faces of each member are inclined in directions intersecting the rotation axis. Motor. 3. The motor according to claim 1, wherein the winding is a single winding.