JPS5822939B2 - Rotor block manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a rotor flock for use in mini motors and the like.

Conventionally, the rotor block of a mini motor has been constructed by fitting a commutator plate opening into the opening of a cylindrical coil tube as shown in Fig. The bare wire section C was connected to the copper surface of the commutator board opening using solder.

However, with this conventional manufacturing method for rotor blocks for mini motors, the length of the coils varies, making it difficult to maintain dynamic balance, and the end faces of the coils are uneven, making it difficult to make electrical connections with the commutator plate opening. 7111.

Therefore, there is a drawback that the reliability of the coupling is low, and continuous high-speed winding is difficult because the insulating film in the portion corresponding to the tap must be peeled off during or after winding.

The present invention was developed in view of these conventional drawbacks, and it facilitates the winding work of coil wire, enables high-speed automatic winding, stabilizes the coil dimensions, and improves dynamic balance. The comb is easy to remove, stabilizes the electrical connection between the coil and commutator, and enables automatic wiring.

Hereinafter, the present invention will be explained based on the drawings.

Fig. 2 is a perspective view showing one embodiment of the rotor block of the present invention, Fig. 3 is a cross-sectional view of the state in which the end edge of the coil tube and the surface of the commutator plate are connected with a wire, and Fig. 4 is a coil FIG. 5 is a vertical cross-sectional view of the tube in a state where the diameter is reduced, and FIG. 5 is a cross-sectional view.

In the figure, 1 is a coil tube formed into a cylindrical shape by winding a coil wire 2, 3 is a metal core, and 4 is a press mold.

First, the core metal 3 is inserted into the inner space of the coil tube 1,
A press die 4 is pressurized from the outer periphery of the coil cylinder 1.

Reference numeral 5 is a peel-off mold whose upper surface is roughened in the shape of a file, and it reciprocates as shown by arrow A or rotates as shown by arrow B.

That is, the outer diameter of the core metal 3 is formed to be smaller than the inner diameter of the coil tube 1, and therefore, both ends of the coil tube 1 are provided between the end of the core metal 3 and the surface of the peeling mold 5.

Next, the press mold 4 applies pressure in the direction of the center of the coil tube 1 as shown by arrow C, applying force to the outer diameter of the coil tube 1 and reducing the diameter of the coil tube 1 itself.

Due to this pressing force, the length of the cylinder increases slightly, and the upper edge
The lower end edge of the coil tube 1 is in pressure contact with the stepped portion of the peelable mold 5.
Press against the file-like surface.

In this state, move the peeling mold 5 slightly back and forth in the direction of arrow A or arrow B.
direction.

The surface of the end edge of the coil tube 1 is peeled off to expose the bare wire portion.

Next, the bare wire portion at the edge of the coil tube 1 and the copper surface portion 7a on the surface of the commutator plate 7 are connected to the bonding wire 6 by thermocompression bonding.

When the wires are connected by thermocompression bonding in this manner, the electrical connection between the coil and the commutator plate is stabilized, and the wire connection can be performed automatically.

According to the manufacturing method of the rotorp seven pieces of the present invention,
The coil tube is compressed in the mold and its edges are peeled off, so the length of the coil tube can be set accurately and dynamic balance can be easily achieved.

As a result, the coil tube of the rotor block can be wound very easily, and high-speed automatic winding can be performed.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the shape of a conventional rotor block;
Fig. 2 is a perspective view showing one embodiment of the rotor block of the present invention, Fig. 3 is a cross-sectional view of the state in which the end edge of the coil cylinder and the surface of the commutator plate are connected with a pounding wire, and Fig. 4 is a coil FIG. 5 is a vertical cross-sectional view of the tube in a state where the diameter is reduced, and FIG. 5 is a cross-sectional view. 1... Coil tube, 2... Coil wire,
3...Core metal, 4...Press mold, 5...
... Peeling type, 6... Bonding wire.

Claims (1)

[Claims] 1. A core metal is inserted into the inner cavity of a coil tube formed by winding a coil wire into a tube shape, and the diameter of the coil tube is reduced by applying pressure with a press die from the outer surface of the peripheral wall of the coil tube.
The insulation film of the coil wire is peeled off with a peeling die that is in contact with the edge of the coil tube, and the conductive part of the commutator plate fitted into the opening of the coil tube and the bare wire portion of the coil wire are separated. A manufacturing method for a rotor block characterized by connecting it with a connecting wire.