JP2874168B2 - Field assembly - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field assembly of a commutator motor used for home electric appliances, power tools and the like.

FIG. 6 shows a field assembly of a conventional commutator motor. In FIG. 6, reference numeral 1 denotes a core as a magnetic path. Reference numeral 2 denotes a coil, which is wound in a slot 3 of the core 1 via an insulating paper 4. 5a and 5b are winding start lines of the coil 2, and 6a and 6b are winding end lines of the coil 2 similarly. Reference numeral 11 denotes a binding thread for fixing the coil 2 after winding.

Hereinafter, the assembling operation of the field assembly configured as described above will be described.

First, the insulating paper 4 is inserted into the slot 3 of the core 1 and the winding start wires 5a and 5b are fixed, and the coil 2 is wound by a predetermined number of turns. 6a and 6b are the end lines of the winding. Thereafter, the coil 2 is fixed with the binding thread 11.

However, in the above configuration, a winding guide is usually required at the time of winding, and the guide is used as a guide to wind the coil 2. The heat dissipation of the coil 2 during the motor operation is poor.

The present invention is directed to improving the heat dissipation of a coil end portion with a simple configuration in relation to the above problems.

Means for Solving the Problems In order to achieve this object, the field assembly of the present invention prevents the coil from sticking to the middle between the inner wall and the outer wall of the coil end storage portion of the winding frame, and only a sufficient gap can be obtained. A hollow separator having a thickness of 3 mm is integrally formed, and a gap through which air naturally flows is formed between the coils wound around the coil end storage portion of the winding frame.

Operation The present invention makes it possible to wind a coil by a single bobbin with the above-described configuration. After the winding is fixed to one terminal on the winding frame at the beginning of the winding, a predetermined number of windings is applied to one of the separators in the coil end housing.
After half winding is aligned and then winding the remaining number of turns on the other side of the separator, the end winding is fixed to the other of the terminals to complete the coil. At this time, voids are formed in the coil at the coil end portion over the entire area of the separator portion, so that heat does not easily accumulate on the inner surface of the coil, and at the same time, the surface area of the coil contacting air increases, so that heat dissipation can be improved.

Also, since the winding can be individually aligned and wound on the bobbin,
Tapping of the coil or winding with a different number of turns for each pole of the field assembly can be easily performed.

Embodiment A field assembly according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a field core divided into a yoke portion 1a and a pole portion 1b, 2 is a coil, 3 is a slot, 4a, 4
b is a slot insulating portion, 5a and 5b are winding start lines, 6a and 6b are winding end lines, 7 is a terminal, 8 is a winding frame, slot insulating portions 4a and 4b around which the coil 2 is wound, and a coil end storing portion. The inner wall 9a, the outer wall 9b, and the coil are prevented from adhering to each other, and a hollow separator 10 having a thickness enough to obtain a sufficient gap is integrally formed.

Regarding the field assembly configured as described above,
The assembly configuration will be described with reference to FIGS. 1, 2, 3, 4, and 5. FIG.

First, FIG. 2 shows details of the winding frame 8, in which the slot insulating portion 4a is located on the same plane as the outer wall 9b of the coil end storage portion, and after winding, the field core 1a of FIG. Slot part 3
It has a hardness and shape that can be bent into a shape. 9c is an end surface insulating portion at both end surfaces of the core, which prevents the coil from adhering and places a hollow separator 10 having a thickness enough to obtain a sufficient gap between the inner wall 9a of the coil end housing portion and the outer wall 9b of the outer wall 9b. The center of the support. Terminal 7 is the outer wall 9b before winding
It is fixed to.

FIG. 3 shows a completed coil in which the coil 2 is aligned and wound on a winding frame 8 and a winding start wire 5b and a winding end wire 6b are connected to a terminal 7. At this time, the coil 2 in the portion surrounding the separator 10 has all the gaps of 2 mm or more with the separator 10 interposed therebetween, and the maximum height of the coil 2 is at least 2 mm lower than the hole height of the separator 10.

4b is a pole portion of the split core and a wedge-shaped convex portion 1c.
It has. In FIG. 5, reference numeral 1a denotes a yoke portion of the split core.
It has a concave portion 1d for combining the wedge-shaped convex portion 1c in the figure.

As described above, first, the winding is connected to one terminal 7 provided on the winding frame 8 with the winding start wire 5b, and any one of the separators 10 between the inner wall 9a and the outer wall 9b of the coil end storing portion is connected. On one side, half of the predetermined number of turns are aligned and then on the other side, the remaining number of turns are aligned, and the winding end line 6b is connected to the other terminal 7 to complete the coil. to make. At this time, the coil 2 at the coil end is 2 m over the entire area of the separator 10.
A gap of m or more is formed.

Next, the completed coil body is inserted into the pole portion 1b of the divided field core, and the slot insulating portion 4a of the winding frame 8 is deformed by a jig or the like into a shape along the slot 3 of the yoke portion 1a of the field core. The wedge-shaped protrusion 1c of the pole portion 1b of the field core and the recess 1d for fitting the yoke portion 1a are pressed together and fixed to complete the field assembly.

Effect of the Invention As described above, the present invention provides a hollow separator having a thickness sufficient to prevent the coil from adhering between the inner wall and the outer wall of the coil end storage portion, and providing a sufficient gap, and The following effects can be obtained by the configuration in which the winding is performed separately on both sides of the separator, and the winding start line and the winding end line are connected to the terminals on the winding frame.

(1) By arranging the windings of the coil on both sides of the separator at the coil end part by 1/2 of a predetermined number of turns and forming a winding, a gap is formed between both coils of the separator part, so that when the motor is running The heat generated by the internal coil of the coil end can be quickly transmitted to the outside, the surface area of the coil exposed to air can be increased, and the effect of increasing the amount of heat dissipation and reducing the temperature rise of the coil can be obtained.

(2) Since the aligned windings can be individually formed by the winding frame alone, tapping of the coil and adjustment of the number of individual windings can be easily performed.

(3) Since a finished coil can be formed by aligning and winding on the winding frame, various managements are facilitated in terms of production due to an increase in winding speed and a structure completely separated from the field core.

(4) By forming the separator integrally with the winding frame portion, the coil can be easily formed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a field assembly according to an embodiment of the present invention, FIG. 2 is a detailed perspective view of a bobbin of FIG. 1, and FIG. 3 is a bobbin of FIG. Perspective view of completed coil wound in detail view, 4th
5 and 5 are perspective views of the pole and yoke structure of the split field core of FIG. 1, and FIG. 6 is a perspective view of a conventional field assembly. 1 ... field core, 2 ... coil, 3 ... slot, 8 ...
... Reel, 9a ... Inner wall, 9b ... Outer wall, 10 ... Separator.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 3/00-3/52

Claims (3)

(57) [Claims] 1. A coil wound around a winding frame made of an insulating material, a part of the coil is separated every half of a predetermined number of turns,
A field assembly, wherein a separator that forms a gap through which air naturally flows between one of the separated closely-wound coils and the other closely-wound coil is provided in the winding-frame coil end storage portion. 2. A winding frame in which a separator is formed integrally with an end surface insulating portion, a coil wound on the winding frame, and a yoke portion containing the winding frame, wherein the coil is partially formed by the separator. A field assembly that is separated and forms a gap between the separated coils through which air naturally flows. 3. The field assembly according to claim 2, wherein the separator is provided in the winding coil end storage portion.