JPS6243425B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a ironless core armature, which involves winding a multifilamentary wire sheet material in a spiral shape and then cutting it into predetermined dimensions to form a coil body.

In general, one of the manufacturing methods for iron-free core armatures is
A large number of wire rods 1 are arranged in parallel to form a multifilamentary wire sheet material 2.
The multifilamentary sheet material 2 is spirally wound in one direction around the outer periphery of the core material 11 as shown in FIG.
As shown in the figure, another multifilamentary sheet material 2 is spirally wound around the outer circumference of the inner tube 3 in the opposite direction to the inner tube 3 to form an outer tube 4, and a cylindrical body consisting of these inner and outer tubes 3 and 4 is formed. It has been proposed to form a coil body 6 as shown in FIG. 2 by cutting 5 to a predetermined dimension L.
In this manufacturing method, it is necessary to electrically connect the wire rods 1, 1 of the inner and outer cylinders 3, 4 at the end face portions of the coil body 6 to form a closed loop.

Therefore, conventionally, both wire rods 1, which are to be electrically connected to each other,
1, the laser beam was irradiated over the end face of the wire rods 1 to the area shown by the cross hatched area in the same figure, and the two wire rods 1, 1 were laser welded. Since there is a film layer 12 in between, it is difficult to join the wire rods 1, 1, and there is a problem in that the manufacturability is poor.

The present invention has been provided in view of the above-mentioned points, and when joining the wires of the inner cylinder and the outer cylinder forming the coil body, the connection terminal provided on the transparent material is laser welded to the end face of the wire. The first objective is to provide a method for manufacturing a iron-free core armature that enables easy and accurate electrical connection between wires and improves productivity. A second object of the present invention is to provide a method of manufacturing a iron-free core armature that can be simultaneously connected to a daughter plate and achieve cost reduction by simplifying the manufacturing process.

An embodiment of the present invention will be described in detail below with reference to the drawings.
In the present invention, after cutting the cylindrical body 5 formed as shown in FIGS. 1a and 1b to a predetermined dimension L to form the cylindrical body 5, as in the conventional example, at the end surface of the cylindrical body 5, A transparent material 8 provided with a large number of connection terminals 7 for electrical connection between the end faces of the wire rods 1 and 1 of the inner and outer cylinders 3 and 4
The method is characterized in that the connection terminal 7 and the end faces of the wire rods 1 and 1 are laser welded using a wire rod. Figures 4a and b show an annular band-shaped transparent material 8.
An embodiment of the present invention is shown in which a large number of connection terminals 7 are provided on the upper surface, the transparent material 8 is formed from a transparent plate or a transparent film, and the connection terminals 7 are arranged at the same pitch as the winding pitch in the cross section of the coil body 6. Arranged at equal intervals. Further, when the wire rods 1, 1 of the inner and outer cylinders 3, 4 are wound in parallel in the coil body 6, the connection terminals 7 are formed radially on the transparent material 8 as shown in Fig. 5a. When the transparent material 8 and the connecting terminal 7 are wound in different steps, the connecting terminal 7 is formed in an inclined shape as shown in FIG. Alternatively, if the heat generated during welding can be sufficiently withstood, the transparent material 8 may be used only for positioning the connection terminal 7, and the transparent material 8 may be removed after welding.

Therefore, in this embodiment, an annular band-shaped transparent material 8 with connecting terminals 7 as shown in FIGS. 4a and 4b is attached to the end face of the coil body 6 as shown in FIG. Both ends of each connection terminal 7... are made to correspond to the end surfaces of the wire rods 1, 1 of the inner and outer cylinders 3, 4 as shown in Fig. 7 a or b, and then in Fig. 7 a or b, the cross hatched portions A laser beam is irradiated onto the shown portion through the transparent material 8, and both ends of the connection terminal 7 and the end faces of the wires 1, 1 are laser welded to form an electrically closed loop.

8 to 10 show another embodiment of the present invention, in which the transparent material 8 of the previous embodiment and a general commutator plate are integrated. A commutator 10 is provided in which a slave plate 9 is formed of a transparent material, a large number of connection terminals 7 are arranged on the lower surface of the peripheral edge thereof at intervals of the winding pitches as in the previous embodiment, and the upper surface of the central part of the commutator plate 9 is formed. Connect the above connection terminal 7
The commutator 10 in this embodiment is made up of five segments.

Thus, in this embodiment, the commutator plate 9 is arranged so as to cover the opening at one end of the coil body 6, and the connection terminal 7 on the lower surface of the periphery of the commutator plate 9 is brought into contact with the end face of the coil body 6. After that, laser light is irradiated to the cross hatched part in FIG. 9 as shown by the arrow in FIG. At the same time, the commutator plate 9 is connected to the coil body 6.
It is fixed to the end face.

Since the present invention is constructed as described above, the wire ends of the inner and outer cylinders constituting the coil body can be easily electrically connected to each other, and the work of forming an electrically closed loop in the coil body is greatly facilitated. Moreover, since the connecting terminal is provided on a plate-like or film-like transparent material, it has the effect that the positioning of the connecting terminal on the end face of the coil body can be performed extremely easily. In addition, since the laser beam is irradiated onto the connection terminal through the transparent material, the laser welding between the connection terminal and the end face of the wire can be performed accurately and efficiently.

[Brief explanation of the drawing]

Figures 1a and b are explanatory diagrams of the method for forming a coil body which is the premise of the present invention, Figure 2 is a perspective view of the same coil body as above, Figure 3 is an enlarged perspective view of the main part of a conventional example, and Figure 4. a and b are a plan view and a sectional view of a transparent material with a connecting terminal according to an embodiment of the present invention; FIGS. 5 a and b are enlarged perspective views of essential parts showing different aspects of the connecting terminal; FIGS. 7a and 7b are enlarged perspective views of essential parts showing the connection between the connecting terminal and the end surface of the wire corresponding to FIGS. 5a and b, respectively. FIG. An enlarged plan view of a commutator plate according to another embodiment of the present invention, FIG. 9 is an enlarged plan view of the main part showing the connection state between the connecting terminal and the end surface of the wire, and FIG. 10 is an enlarged sectional view of the main part of the same as above. 1 is a wire rod, 2 is a multifilamentary wire sheet material, 3 is an inner tube, 4 is an outer tube, 5 is a cylinder body, 6 is a coil body, 7 is a connection terminal, 8 is a transparent material, 9 is a commutator plate, 10 is a commutator.

Claims (1)

[Claims] 1. A multifilamentary wire sheet material is formed by arranging a large number of wire rods in a planar manner, and this multifilamentary wire sheet material is spirally wound in one direction to form an inner cylinder. A coil body is formed by winding another multi-filamentary sheet material around the outer circumference in a spiral shape in the opposite direction to the inner cylinder to form an outer cylinder, and cutting the cylinder consisting of the inner and outer cylinders to a predetermined length dimension. In a method for manufacturing an iron core armature, a transparent material in the form of a plate or film is formed with connection terminals at the same pitch as the winding pitch in the cross section of the coil body, and this transparent material is attached to the end face of the coil body. A method for manufacturing a iron-free core armature, which comprises joining a connecting terminal and an end face of a wire rod by laser welding to form an electrically closed loop. 2 Connecting terminals are provided on the lower surface of the periphery of the commutator plate made of transparent material at the same pitch as the winding pitch in the cross section of the coil body, and the commutators on the upper surface of the commutator plate are connected to these connecting terminals at appropriate pitch intervals. The iron-core electric machine according to claim 1, characterized in that the connection terminal and the end face of the wire are joined by laser welding to form an electrically closed loop, and at the same time, the coil body and the commutator plate are joined. Method of producing children.