JPS58139652A - Assembling structure of field coil and forming method therefor - Google Patents

Abstract

PURPOSE:To prevent the damage of a field coil due to contact of a penetrating bolt by restricting the strand coil by a pressing die at the inner and outer peripheries, press deforming the coil, and bending a flat conductor in parallel. CONSTITUTION:A groove 10a which restricts the profile shape of a field coil 11 is formed on a lower die 10 which is mounted on a press, a strand coil is engaged within the groove 10a, an upper die 4 is operated, a flat conductor 2 is bent in parallel and a field coil 11 is manufactured. Then, the coil 11 is secured so that the neck 8a of a pole 8 is inserted into the inner peripheral surface of the field coil 6 and the bottom surface of the coil 6 is held by the inner peripheral surface of a cylindrical yoke 7. In this manner, a dead space which is formed of the inner peripheral surface of the field coil and the neck of the pole is removed, and formed, thereby preventing the damage of the field coil due to the contact with a penetrating bolt.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly structure and a method for forming a wild coil, particularly a filled coil of a DC motor used as a prime mover of a starter.

Conventionally, this type of assembly structure and molding method is shown in Figure 1 (IL).
There were those shown in (d). First, Figure 1 (a), (
In b), the unwound coil is a +1) Tfi filled coil, in which a rectangular conductor (2) is wound around a formwork (not shown) with intervening insulating paper (8) interposed therebetween. Next, this unwound film f1) is molded into the shape shown in FIG. 1(C) using a molding press die. That is, in Figure 1 (0), (4)
is a press upper die, and f! is one of the yokes described below. 1iIr
It has an R-shaped part (41) equal to the I7J curvature, and the above unwound coil (1) is placed between the outer 141-shaped part (5&) of the lower mold (5) and R-shaped into the shape shown. Obtain the filled coil (6). Next, as shown in Fig. 1 (+1), the above-mentioned filled coil (
6), and the Ill part (8L) of the magnetic pole (8) is 1il of the filled coil (6)! ili, and is fixed to the inner circumferential surface of the yoke (7) so as to sandwich the bottom surface of the filled coil (6) with the polar arc portion (8b). (9) is a through bolt for screwing the field device configured as shown in the figure to the machine frame (not shown). In addition, in order to facilitate R bending of the filled coil (6), the magnetic pole neck (8
With respect to &), an inner circumferential surface angle of (is formed, and accordingly, a void δ shown in the figure is formed on the inner circumferential surface of the fill fill (6). Regarding the operation of the field device having the above configuration, Since this is well known, the explanation will be omitted.

The conventional device is assembled as described above, but in this case, the end face of the filled coil (6) is close to the through bolt (9), so there are drawbacks such as there is a risk that they will come into contact with each other and cause a ground fault.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and the outer shape is regulated so as to completely eliminate the dead space formed by the inner peripheral surface of the filled coil and the neck of the magnetic pole. The aim is to provide products with the excellent effects described below by performing R-forming processing.

An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 2 (&), αQ is a lower die mounted on the press device, and is a concave groove (10 &) that regulates the outer shape of the filled coil. have. And the above-mentioned figure 1 (&
) is inserted into the concave groove (1OA) and the same hill shape (4) as shown in Fig. 1 (0) is operated, and the filled coil (B) is press-formed. The shape shown in the figure (parallel bending of rectangular conductor (2)) K is manufactured.

Note that (4b) is a protruding portion having the same cross-sectional shape as the neck (8&) of the magnetic pole (8), which controls the shape of the inner circumferential surface during the above-mentioned pressure molding to ensure processing. Next, the above-mentioned filled coil (b) is taken out from the lower mold αQ, as shown in Fig. 2(b).
As shown in FIG. 1, the mounting is performed in the same manner as described in connection with the conventional device shown in FIG. The configuration other than the above is the same as that of the conventional device shown in FIG. 1, so the same reference numerals are used and the explanation thereof will be omitted.

If you do the above, you can create a rectangular conductor (2
) by parallel bending, the neck (8&) of the magnetic pole (8) and the inside 11i of the filled fill (b)! There is no dead space between the outer surface of the filled coil 4 and the through bolt (9).
The drawbacks such as ground faults explained in the conventional device shown in the figure are eliminated.

In the above description, the press die used for parallel bending of the rectangular conducting wire of the unwound coil is provided with a concave groove in the lower die and the upper m'
In the above description, the upper die may have grooves, or the upper die and the lower die may each have grooves. in this case,
As described above, according to the present invention, the unwound coil is press-deformed by controlling the inner and outer edges with a press mold, and the flat conductor is made into a rectangular conductor. Since it is bent in parallel, damage to the filled coil due to contact with the through bolt is prevented, and the space factor around the filled coil is improved (because there is no dead space), making the motor (especially the field device 1) smaller and lighter. It has an extremely excellent effect that it can be obtained at low cost with a simple structure and method.

[Brief explanation of drawings]

Figure 1 (IL) is a plan view of the material before processing using the conventional equipment;
Ti! fI(b) Fi Fig. 1 (&) A-Ali sectional view, 1st! II (0) is a sectional view of the main parts showing the configuration for explaining the conventional processing method, Fig. 1 @)#i Fig. 1 is an assembled sectional view of the product manufactured by (0), Fig. 2 (&) 2 is a cross-sectional view of main parts showing a manufacturing method according to an embodiment of the present invention, and FIG.
FIG. 2(b) is a partial sectional view of a field device manufactured by the method shown in FIG. 2(&). In the figure, [1] Fi unwound coil, (2) Id rectangular conductor, (
4) Pigeon I! , (7) is the yoke, (8) is the magnetic pole, (81)
is the gIA part, GO is the lower mold, (10m) is the concave groove, and gyi is the wild coil. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - Figure 2 (6)

Claims (1)

[Scope of Claims] (1) It has a cylindrical yoke and a magnetic pole fixed to the curved surface inside the yoke, and is made of a rectangular conductor wound closely and parallel to the outside 1i11 of the neck of the magnetic pole. A filled coil assembly structure characterized by being equipped with a filled coil. (2) In advance, a rectangular conductor is wound around a frame having a cross section of the magnetic pole neck to make an unwound coil, and this unwound coil is placed in a molding press mold C (upper mold and lower mold) that regulates the internal and external shapes. make use of,
A wild coil characterized in that it has an inner circumferential surface shape that is equal to the radius of the inner curved surface of the yoke and larger than the surface shape of the magnetic pole m portion, and that the outer l1iiiI side surface is press-molded so as to be parallel to the magnetic pole neck. molding method. (8) The method for molding a filled coil according to claim 2, characterized in that a press mold for molding is used in which either the upper or lower mold is provided with a groove for fitting the unwound coil. (4) A molding press mold having concave grooves for fitting unwound coils distributed to each of the lower molds is used. Molding method.