JPS6035900B2 - Iron-free core armature - Google Patents

Description

[Detailed description of the invention] This invention relates to a coreless armature.

The core-less armature, which is the basis of this invention, can be produced in large quantities continuously, has a large degree of freedom in coil patterns, has a uniform coil wire length per turn, has good dynamic balance, and has a good rectified waveform. There are advantages.

That is, as shown in FIGS. 1 to 6, a wire sheet 2 formed of n coil wires 1 arranged in parallel in an insulated state is attached to a core bar 3 in the same way as a so-called multi-thread screw. The winding is performed to form an inner cylinder 4, and then the Hata wire sheet 5 is wound on the inner cylinder 4 in the opposite direction to the inner cylinder 4 in a so-called multi-thread shape to form an outer cylinder 6. (The wire may be wrapped twice inside and outside). And torsion angle 180 (・±
Harm) degree! The plate to be used is cut to form a coil unit 7 as shown in FIG. 2 (L). Further, the closed loop forming opposing portions 8 of the coil wires 1 of each of the outer cylinder 6 and the inner cylinder 4 at both ends of the coil unit 7 are irradiated with a laser beam 9 shown by arrows in FIG. 3 to sequentially join them. The outer cylinder 6 and the inner cylinder 4 form an electrically closed loop, forming a continuous armature winding as shown in FIG. A commutator plate 10 and a shaft 11 are fixed to this coil unit 7 as shown in FIGS. 5 and 6, and jumper wires 13 are used to connect the coil wires 1 and commutator segments 12. Forms an iron core type armature. However, in this ironless core type armature, it is not easy to join the wires because there is a coil coating layer la and a gap 6 between the wires, and the connection part is completely exposed, for example, the commutator segment There was a problem in that frictional metal powder etc. of No. 12 and Arashi Uko easily adhered to the connection part, causing a layer short circuit.

Furthermore, since jumper wires are required, there is a drawback that the number of parts increases and the number of connection operations increases. Therefore, an object of the present invention is to provide a coreless armature that can improve productivity.

An embodiment of the first invention is shown in FIGS. 7 to 14.

That is, this ironless core type armature has a coil unit 14
A ring-shaped body 15 is formed of a transparent film or a transparent substrate so as to cover the end face of the ring-shaped body 15, and a large number of conductive pieces 16 are arranged on both sides of the ring-shaped body 15 in contact with each other at a pitch of the coil wire in the circumferential direction. Provided according to the number. As shown in FIG. 8, a ring-shaped body 15 is placed on the end face of the coil unit 14, and using its transparency, a laser beam 17 is projected from the surface of the conductive piece 15.
6 and the loop-forming opposing portion of the wire 1... are welded. Further, as shown in FIG. 9, the ring-shaped body 15 is heated and pressurized using a heat punch to heat-seal the ring-shaped body 15 to the coil coating 14a of the coil unit 14, thereby completely insulating the end portion of the coil unit 14. 12 to 14 show a continuous production process, in which conductive strip groups 20 to 21 arranged in a ring shape are arranged in the longitudinal direction on a band-shaped transparent plate (or film) 19, and coil units 24 and Bring... into contact. A laser beam S is projected from the upper surface of the transparent plate 19 to weld the conductive piece and the wire, and then a ring-shaped body 15 is punched out by hot pressing using a die 25, a heating punch 26, and cutting punches 27 and 28. At the same time, it is fused to the end face of the coil unit 24. 29 is a coil holding plate.

For installation of commutator plate and shaft, see Figures 1 to 6.
This is the same as the case shown in the figure.

With this configuration, the end face of the coil unit can be completely sealed by the ring-shaped body 15, and a layer short can be prevented.

The conductive pieces 16 can be easily arranged at a predetermined pitch by etching or the like, and can be easily aligned with the end face of the coil all at once. Furthermore, by using the method shown in FIGS. 12 to 14, continuous mass production of coil end face treatment becomes possible, and productivity can be greatly improved. An embodiment of the second invention is shown in FIGS. 15 to 22.

That is, in this ironless core type armature, instead of the ring-shaped body of the embodiment of the first invention, the commutator plate 30 provided with the wheels N and bosses M is made transparent, and the back surface of the commutator plate 30 is made transparent. The conductive pieces 31 are arranged in a ring shape (similar to the embodiment of the first invention), and the commutator plate 301 has a plurality of extending pieces 32 projecting in the direction of the flea. A connecting piece 34 for connecting the commutator segment 33 and the conductive piece 31 is provided on the piece 32. This commutator plate 30 is made by laser welding the conductive piece and the inner and outer wires of the coil unit 35, as in the embodiment of the first invention, and further pressing the extension piece 32 with a pressure punch 36, as shown in FIG. The connection piece 34 is folded back to the end of the commutator segment 33 (FIG. 21) and soldered to the commutator segment 33 (H).

With this configuration, this iron-less core type armature can perform the thread connection of the coil unit 35 and the installation of the commutator plate 30 at the same time, so that productivity can be further improved compared to the embodiment of the first invention. Furthermore, jumper wires such as lead wires are not required and automation is possible.

This greatly reduces the number of parts and reduces costs. Other effects similar to those of the embodiment of the first invention are obtained. As described above, in the ironless core type armature of the present invention, a double tube is formed with the Aoi wire constituting the armature coil, which is cut and separated into predetermined lengths, and a winding is formed by end face connection processing. In the coil roof, the end surface is laterally formed into the end surface treatment member.

A forming conductive piece is provided and touches the end of the coil unit,
Furthermore, since it is connected to the wire and heat-sealed to the wire sheath of the coil unit, the end processing work of the coil unit can be greatly streamlined, and the electrical insulation of the end of the coil unit is ensured, preventing layer shorts. In addition, since conductive pieces are provided on the commutator plate and the windings are formed at the same time as the commutator plate is installed, the number of parts can be reduced, productivity can be further improved, and costs can be reduced. It has the effect of being able to.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the wire wound into a cylindrical shape to form a coil unit, Figure 2 is a perspective view of the coil unit separated by cutting it into predetermined lengths, and Figure 3 is an enlarged view of its main parts. A perspective view, FIG. 4 is a perspective view showing the winding state of the armature winding,
Fig. 5 is a perspective view showing the connection state of the ends of the coil unit, Fig. 6 is a perspective view of the armature winding, and Fig. 7 is an exploded view showing the process of attaching the ring-shaped body in an embodiment of the first invention. Perspective view, No. 8
The figure is a perspective view showing the ring-shaped body installed state, Fig. 9 is an exploded perspective view showing the hot press state, and Fig. 10 is Fig. 11
An X-ray cross-sectional view, FIG. 11 is an enlarged perspective view of the end of the coil unit with the ring-shaped body attached, FIG. 12 is a cross-sectional view showing the pressed state in the continuous mass production process, and FIG. 13 is the end of the coil unit in the continuous mass production process. Fig. 14 is a perspective view of a winding formed by welding ring-shaped bodies, Fig. 15 is a plan view of a commutator plate according to an embodiment of the second invention, and Fig. 16 is a side view thereof. 17 is an exploded perspective view showing the installation process of the commutator plate and the coil unit, FIG. 18 is an enlarged plan view of the main part in the installed state, FIG. 19 is a sectional view of the main part in the welded state of the conductive piece, FIG. 20 is a sectional view of the extended piece in a pressed state, FIG. 21 is a sectional view of the saddle piece in a folded state, and FIG. 22 is a perspective view of the armature. 14, 35... Coil unit, 15... Ring-shaped body (
end treatment member), 16, 31... conductive piece, 30...
...Commutator plate, 34...Connection piece. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 7 Figure 9 Figure 10 Figure 11 Figure 12 Figure 14 Figure 13 Figure 15 Figure 16 Figure 17 Figure 20 Figure 18 Figure 19 Figure 21 Figure 22

Claims (1)

[Scope of Claims] 1. A coil unit formed by forming an inner and outer double cylinder with a large number of wires constituting the armature winding and cutting and separating them into predetermined lengths, and a coil unit formed by cutting and separating into a predetermined length, and An end processing member that is fused and has conductive pieces arranged along the circumferential direction of the end of the coil unit to mutually connect the closed loop forming opposing parts of the inner and outer strands of the coil unit. Iron core type armature. 2. The ironless core type armature according to claim 1, wherein the end treatment member is a transparent body, and the conductive piece and the wire are laser welded through the transparent body. 3. A coil unit formed by forming an inner and outer double cylinder with a large number of wires constituting the armature winding, and cutting and separating this into a predetermined length, and a commutator segment. A commutator plate attached to the end portion, and a conductive conductor arranged in a ring shape on the mounting surface side of the commutator plate and interconnecting the opposing portions of the inner and outer wires of the coil unit to form a closed loop. and a connecting portion for connecting a predetermined one of the conductive pieces to a commutator of the commutator plate. 4. The commutator plate is a transparent body, the conductive piece and the wire are laser welded through the transparent body, and the connection part is integrally formed with a predetermined one of the conductive piece, and the commutator segment is folded back. The iron core type armature according to claim 3, which is connected to the iron core type armature according to claim 3.