JPH03226253A - Stator for commutator motor - Google Patents

Abstract

PURPOSE:To facilitate assembling by a method wherein a square retaining member, pinching a stator core, whose magnetic pole is wound by a coil, from both surfaces, is provided with projections, retaining the beginning and the end of the coil, and positioning boss on the periphery of the same. CONSTITUTION:A coil 3 is wound around magnetic poles 4 on the internal peripheral surface of a stator core 1 formed by laminating a plurality of steel sheets 2. An insulating sheet 5 is inserted between the coil 3 and the core 1. The core 1 is pinched by square retaining members 6 from both surfaces of the same. On the other hand, the retaining member 6 is provided with a plurality of projections 10 on the four sides of the same to retain the beginning end and the final end of the coil 3. Bosses 7 are established on the left and right sides of the retaining member 6 to engage them with recesses 8 provided at the left and right of the core 1 to effect positioning. Further, the retaining member 6 is provided with one pair of left and right curved parts 9 while a rotor, omitted from drawings, is inserted between the curved parts 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application This invention relates to a stator for a commutator motor, and more particularly to improvements in a coil holder for holding a coil wound around the magnetic poles of the stator.

(Conventional technology) As a stator for a commutator motor, for example, the one disclosed in Japanese Utility Model Publication No. 10456/1983 is known. This publication describes a stator in which a coil retainer is provided in a connecting part that connects coil holding parts located at both ends of a stator core, and has a terminal block that holds a terminal protruding in a direction perpendicular to the extension line of the connecting part. It is shown.

(c) Problems to be Solved by the Invention However, in the above structure, when press-fitting a morph into a frame, if the terminal is press-fitted with the terminal protruding outward, there is a possibility that a defect may occur during press-fitting. Also, if the terminals were bent, there was a possibility that they would break. On the other hand, if the terminal is hard enough to not break, the workability becomes poor and the number of parts tends to increase.

This invention was made in consideration of the above-mentioned circumstances, and in order to avoid an increase in the number of parts and to avoid getting in the way when inserting the coil or rotor, the coil winding start and winding end are not disturbed. After press-fitting the frame, it is possible to easily connect the wires to the cylinder part to provide the stator of the commutator motor.

(d)! Means for Solving IM This invention consists of a stator core, a coil wound around the @ pole of the stator core, and a coil holder attached to both rear surfaces of the stator core to hold the coil in a fixed shape. The stator core has a positioning recess into which the protrusion provided on the surface of the coil holder facing the stator core fits, and the coil holder has a positioning recess in which the protrusion fits into the coil holder. A stator for a commutator motor characterized by having a plurality of end holding protrusions that individually hold two parts in a removable manner.

(E) A plurality of end-holding protrusions provided on the surface of the working coil holder facing away from the stator core separately hold two separate locations near the winding start and winding ends of the coil. . As a result, the beginning and end of the coil color 3 will be temporarily attached to the coil holder.
, which facilitates the work of press-fitting the stator core into the frame.

(F) EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following examples.

In FIGS. 1 and 8, a stator core 1 is formed by laminating a plurality of iron core plates 2 and fixing them by V[CS caulking. A pair of magnetic poles 4 around which a coil 3 is wound are formed protruding from the inner surface of the stator core I. A disconnected sheet 5 having a width larger than the thickness of the stator core is attached to the stator core l from its inner surface to both sides of the magnetic pole 4 in order to reliably insulate between the stator core 1 and the coil 3.

6 is a coil holder, the back surface of which is the stator core l.
A boss 7 for positioning is erected on the surface facing the respective rear surfaces 1a and Ib.

As shown in FIG. 2, this boss 7 is provided on the side surface of the stator core l and fitted into the positioning recess 8. As shown in FIG. A convex curved portion 9 is formed on the surface of the stator core 1, corresponding to the magnetic pole 1 of the stator core 1. Also, the side 6 where the curved portion 9 is provided
On both sides of a and 6b and on the sides 6c and 6d without the curved part 9,
Each end holding protrusion lO is integrally provided upright.

The end holding protrusions 10, which will be described in detail later, are used to removably hold two separate locations near the winding start and winding end of the coil 3. and the third
As shown in the figure, the end holding protrusion 10 is the upper piece! O
1 and a lower piece 102. The lower piece 102 is integrally erected on the surface of the coil holder 6 adjacent to the first through hole required for coloring. The upper piece 101 is the lower piece 1
02 so that a gap 12 is created between the upper end 102a of the
In addition, the coil holder 6 is formed to have a surface that slopes upward toward the outside. This allows the gap 12
The coil conductor is held and released 1-94. Incidentally, the inclined surface: i, C formed on the lower piece 102
It would be nice to have Lola's hand.

This end KS holding protrusion 10, as shown in FIG.
A part of the back side mold may be formed by a screw bottle B and may be molded using a mold. This is because it is necessary to change the gap 12 when the wire diameter of the coil conductor changes.

That is, the recess C1i of the front side mold C, the back side mold A
The threaded bottle B is inserted loosely, but the screwed bottle B
is screwed into the back side mold A, so the height H can be easily changed. By changing this height H, it is possible to form end holding protrusions with different thicknesses of the upper piece 101, that is, with different gaps 12, as shown in FIGS. 5A and 5H. Through hole 11 in coil holder 6
This is what can be done with this threaded bottle.

For assembly, an insulating sheet 5 is attached to a predetermined portion of the inner surface of the stator core 1, and a coil holder 6 is attached to each back surface 1λ, tb, and then the coil 3 is wound around the magnetic pole 4. The coil 3 is held in a constant shape by the curved portion 9 of the coil holder 6. 6th
As shown in the figure, near the winding start end 13 and winding end I4 of the coil 3! ! , each side 6a,
The end holding protrusions erected on eb are held in an amount of 0, and are further held on the end holding protrusions lO erected on the sides 6c and 6d by an automatic coil winding machine. In this state, the stator 1 is press-fitted into the frame 15.

In addition, in FIG. 6, 16 is a rotor, which is located at the center of the stator l. In the same figure, brushes,
Rotor windings, commutators, etc. are omitted from illustration.

When the press-fitting is completed, the coil conductor is pulled in the direction of the frame 15 by the needle 17 of the automatic coil winding machine, and the coil conductor is sequentially pulled toward the side 6c.
, 6d, the coil conductor is detached from the end holding protrusion 10 erected. Then, the end portion of the coil conductor is pulled out from the through hole I8 of the frame 15, inserted into the brush hole 19 of the frame 15, and welded to the brush fitting 22 of the brush terminal 21 fixed with the screw 20 or the power terminal 23. (Illustrated in Figure 7). This completes the assembly of the commutator motor.

(G) Effects of the Invention According to the present invention, since the coil is held in a fixed shape by the coil holder, it is no longer necessary to perform the Kunis treatment to prevent the coil from falling toward the rotor. Since the holding protrusions hold the vicinity of the winding start and winding end of the coil, the coil conductor can be reliably connected to the brush terminal or power supply terminal without providing additional parts such as terminals.

[Brief explanation of drawings]

Fig. 1 is a side view of an embodiment of the present invention, Fig. 2 is a front view of a coil holder in the embodiment, Fig. 3 is a perspective view of an end holding protrusion of the coil holder, and Fig. 4. FIG. 5A is a configuration explanatory diagram showing the configuration of the mold including the peak cross section of the end holding protrusion.
6 and 7 are longitudinal cross-sectional views of main parts showing configurations when the gap between the end holding protrusions is wide and narrow, respectively.
The figures are a front view showing the structure of the embodiment in which the stator is press-fitted into the frame and the ends of the coil conductors are processed, and FIG. 8 is an exploded perspective view showing the relationship between the stator and the frame. !... Stator core, 3... Coil,
4... Magnetic pole, 6... Coil holder, 7
...Boss, 8...Positioning recess, 10
,... End holding protrusion, 13... Winding start end, 14... Winding end end. Nod 3 Figure 01 0 Figure Fsi'! Akane Gaphiro 2

Claims (1)

[Claims] 1. Consists of a stator core, a coil wound around the magnetic poles of the stator core, and a coil holder attached to both rear surfaces of the stator core to hold the coil in a fixed shape.
The stator core has a positioning recess into which a protrusion provided on the surface of the coil holder facing the stator core fits,
and a rectifier characterized in that the coil holder has a plurality of end-holding protrusions on the surface facing away from the stator core that individually hold two separate locations near the winding start and end ends of the coil. Child motor stator.