JPH0521973Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to a cup-shaped armature coil body, in particular, a rectangular prototype coil formed by winding coil wire is provided, A plurality of phase coils are bent in the circumferential direction so that the central part of the long side is located on one end surface of the imaginary cylinder, and both U-shaped free ends of the prototype coil are located on the circumferential surface of the imaginary cylinder. This invention relates to a cup-shaped armature coil body formed in a staggered manner.

(b) Prior art As disclosed in Japanese Utility Model Application Publication No. 53-75702, this type of conventional device uses winding of coil wire to
A rectangular prototype coil having flat opposite short sides and flat opposite long sides is formed, the center part of the opposite long sides of this prototype coil is located on one end surface of an imaginary cylinder, and both U-shaped free ends of the prototype coil are placed in an imaginary column. A plurality of phase coils are formed by bending so as to be located on the circumferential surface of the cylinder.
The phase coils are shifted in the circumferential direction to form a cup-shaped armature coil body. A perspective view of this coil body is shown in FIG. As is clear from this drawing, the U-shaped free end 2 of each phase coil 1 has a pair of coil sides 3,
3 and a coil end 4, this pair of coil sides are parallel to the length direction of the imaginary cylinder and do not intersect with the coil sides 3 of the other phase coils 1. Coupling between the coil wires in each phase coil and between adjacent phase coils 1, 1 at the coil end 4 is achieved by once melting a molten layer provided on the surface of the coil wire and then hardening it.

In this way, in the conventional armature coil body, the adjacent coil wires of one coil wire are always the same in the annular shape of the original coil because each phase coil is a flat aligned winding, especially on the coil sides. The disadvantage is that the coil wire tends to unravel and the mechanical strength of the coil sides is weak.

(c) Purpose of the invention The present invention has been devised in view of the above points, and is an electrical machine that can improve both productivity and mechanical strength by improving the coupling structure between coil wires and between phase coils. It is intended to provide a child coil body.

(d) Structure of the device In order to achieve the above object, a prototype coil having opposing short sides and opposing long sides formed by winding coil wires made of self-fused conductor wires is fused together. A phase coil is formed by bending the prototype coil so that the approximate center of its opposing long sides is located on one end surface of the imaginary cylinder, and both U-shaped free ends of the prototype coil are located on the circumferential surface of the imaginary cylinder. It is a cup-shaped armature coil body made by heating a plurality of coil wires and phase coils by heating them in a cup-shaped state by shifting them in the circumferential direction. A pair of coil sides of the free end are inclined in opposite directions with respect to the length direction of the circumferential surface, and the coil sides of at least adjacent phase coils among the phase coils obliquely intersect with each other, and the coil ends at this oblique part. The sides are fused together by the heating described above. That is,
Instead of forming a prototype coil into phase coils after bonding the self-fused conductors and then arranging each phase coil in a cup shape while shifting its position, it is possible to wind the coil wire using self-fused wires. This is a cup-shaped armature coil body in which the coil wires and phase coils are connected by heating the cup-shaped state using multiple prototype coils (fixing all at once after shaping into the cup shape). The coil sides of adjacent phase coils form an oblique part during the shaping process into a cup shape, and at this oblique part, the coil sides are fused together by the heating described above. be.

(E) Embodiment An embodiment of the present invention will be described below based on the drawings.

FIG. 2 is a perspective view of the prototype coil. The prototype coil 5 is formed by winding a coil wire made of self-fused wire, and has a rectangular shape having opposing short sides 6, 6 and opposing long sides 7, 7. Each side of this rectangle is rod-shaped, and its A-A cross section to D-D cross section is the third
As shown in the figure, it is approximately semicircular.

This prototype coil 5 has a central portion 8 of its opposing long sides 7, 7, specifically, between points E and E on one long side and between points F and F on the other long side of the cylindrical jig 9. It is located on one end surface 10 and bent so that both U-shaped free ends 11, 11 are located on the circumferential surface 12 of the cylindrical jig 9 to form a phase coil. A perspective view of this phase coil 13 is shown in FIG. 4, and a GG sectional view of the central portion 8 and an HH sectional view of the coil side 14 are shown in FIGS. 5A and 5B. As is clear from these drawings, when forming the phase coil 13, the pair of coil sides 14, 14 and the coil end 15 at each U-shaped free end 11 are formed to have a flat cross-section.

Further, as is clear from FIG. 4, each pair of coil sides 1 of both U-shaped free ends 11, 11 of the prototype coil 5
4 and 14 are formed to be inclined in the opposite direction to the length direction of the cylindrical jig 9. In this case, the center portion 8 located on the end surface 10 of the cylindrical jig 9, that is, the distance between the pair of crossover wire portions 16, 16, is set at the coil end 15.
It may be made larger or smaller than the length of .

A cylindrical jig 9 holds a plurality of phase coils 13 as shown in FIG.
By heating, each phase coil 1 is shifted in the circumferential direction.
The cup-shaped armature coil body shown in FIG. 6 is formed by hardening the coil wires constituting the coil wires 3 and hardening the overlapping coil ends 15 of each phase coil and the crossing portions 17 of the coil sides 14 of the adjacent phase coils. .

In the above, multiple phase coils 13 are created individually,
Although this is a case where the armature coil body is created by combining these phase coils, it is also possible to form a plurality of phase coils at the same time to create the armature coil body.

That is, as shown in FIG. 7, the central portions 8 of the plurality of prototype coils 5 are supported between the plurality of pins 18 and 19 provided on one end surface of the cylindrical jig 9, and in this state, the cylindrical jig 9 is
is inserted into the hollow cylinder 20. By heating each phase coil 13 in this inserted state, the armature coil body shown in FIG. 6 is formed. Reference numeral 21 in FIG. 6 is a connection terminal portion connected to the commutator segment.

(f) Effects of the invention As described above, in the cup-shaped armature coil body according to the invention, a cup-shaped armature coil body is formed using a plurality of prototype coils formed by winding coil wires made of self-welding wires. The coil wires and the phase coils are connected by heating in the formed state (fixing all at once after shaping into a cup shape), and the coil sides of adjacent phase coils constitute diagonal parts, and this Since the coil sides are connected to each other even in the diagonal portion, the following effects can be achieved.

(b) Improving productivity by fixing all at once after shaping into a cup shape: After configuring the cup shape from the prototype coil, the coil wires and phase coils are fixed all at once, making it easy and reliable to shape the prototype coil. Moreover, it is highly productive.

(b) Improving mechanical strength by adopting a structure in which the coil sides are joined at the diagonal part: The coil sides of adjacent phase coils constitute a diagonal part, and even in this diagonal part, the coil sides are joined to each other. Therefore, the phase coils are connected not only to the upper and lower edges of the cup shape, but also to the coil sides between them, so the bonding force between the phase coils is strong, and the coil wire at the coil sides is strong. The mechanical strength of the cup-shaped armature coil body is improved as there is no unraveling. Moreover, the coil sides form diagonal parts during the shaping process into a cup shape,
Because they are joined at the diagonal by later bulk fixation,
That is, since the reinforcing structure is constructed in a series of manufacturing steps, there is no need to attach other members, so productivity is not reduced.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the armature coil body of a conventional device;
Figures 2 to 7 show embodiments of the present invention;
The figure is a perspective view of the prototype coil, FIG. 3 is a sectional view of the prototype coil from A-A to D-D, FIG. 4 is a perspective view of the phase coil, and FIGS. 6 is a perspective view of the armature coil body, and FIG. 7 is a perspective view of the molding process of the prototype coil. 6, 6... Opposing short side, 7, 7... Opposing long side, 5
... Prototype coil, 8 ... Center part, 11 ... U-shaped free end, 9 ... Imaginary cylinder (cylindrical jig), 13 ...
Phase coil, 14, 14...Coil side.

Claims (1)

[Scope of utility model registration request] A prototype coil having opposing short sides and opposing long sides formed by winding a coil wire made of a self-fused conductor wire is heated approximately in the center of the opposing long sides without fusing the coil wires together. is located on one end surface of the imaginary cylinder, and a plurality of phase coils are bent in such a manner that both U-shaped free ends of the prototype coil are located on the circumferential surface of the imaginary cylinder, and a plurality of phase coils are shifted in the circumferential direction. A cup-shaped armature coil body formed by fusing the coil wires and the phase coils by heating in a cup-shaped state, the pair of coils at the U-shaped free ends of the phase coils. The sides are inclined in opposite directions with respect to the length direction of the circumferential surface, and the coil sides of at least adjacent phase coils among the phase coils obliquely intersect with each other, and the coil sides intersect with each other at this oblique part. A cup-shaped armature coil body characterized by being fused together by heating.