JPS59201645A - Coil sheet for coreless type armature - Google Patents

Abstract

PURPOSE:To eliminate the inclination of a plurality of coil strands even if a twisting force is applied by aligning in parallel the coil strands of trapezoidal sectional shape alternately so that the upper bottom of the trapezoidal shape is disposed in a reverse direction. CONSTITUTION:Coil sheets 3 for a coreless armature are aligned in parallel so that a plurality of coil strands 4 of trapezoidal sectional shape are alternately disposed at the upper bottom is arranged in a reverse direction. Since thus constructed, the inclination of the strands 4 does not occur even if forces are applied as designated by arrows to both side faces of the coil sheet 3 at the front and back surfaces of the sheet 3, and the pitch of the strands 4 can be accurately maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a coil sheet for an ironless core type armature.

[Background technology]

In general, a coil unit for a non-ferrous core type armature is made up of a coil sheet 2 for a non-ferrous core type armature, which is made up of coil wires 1 made of Hakusen wires arranged side by side in an upright state, as shown in Fig. 1. is twisted onto the cylindrical surface to form a spiral inner cylindrical coil (
(not shown) and an outer cylindrical coil (not shown) with the twist direction in the opposite direction.
) is formed on the outer periphery of this inner cylindrical coil, and the end of the inner cylindrical coil wire and the end of the coil tension wire of the outer cylindrical coil are electrically connected using welding auxiliary wires on both the upper and lower end surfaces of the cylinder. Created by connecting. Note that the ironless core type armature is constructed by providing this coil unit with a commutator and a shaft. However, when the coil sheet 2 is twisted onto the cylindrical surface in this way, the coil wires 1 made up of flat wires are tilted at the center of the coil sheet 2, resulting in poor alignment, as shown in FIG. However, there has been a problem in that it is difficult to properly connect the coil wires of the inner cylinder and the outer cylinder using the welding auxiliary wire.

[Purpose of the invention]

An object of the present invention is to provide a coil sheet for an iron-core type armature in which the coil wires do not tilt even when a torsional force is applied.

[Structure of the invention]

The ironless core type armature coil sheet of the present invention is characterized in that a number of coil wires each having a trapezoidal cross-sectional shape are arranged in parallel so that the upper bases of the trapezoids alternate in opposite directions. It is grilled.

In other words, by arranging coil wires with trapezoidal cross-sectional shapes in parallel so that the trapezoids are reversed, the wires are held together by the wedge principle even when torsional force is applied. As a result, the strands become tilted.

Next, the present invention will be explained based on examples.

FIG. 3 is a block diagram of an embodiment of the present invention.

That is, this ironless core type armature coil sheet 3 is constructed by arranging a plurality of coil wires 4 each having a valley-shaped cross section so that the upper bases of the trapezoids alternate in opposite directions. .

Because of this structure, even if force is applied to the front and back surfaces of the coil sheet 3 as shown by the arrows, or even if force is applied to both sides of the coil sheet 3 as shown by the arrows, the coil wire 4 will not move. They hold each other together using the wedge principle. Therefore, even if a twisting force is applied, the coil wire 4 does not tilt at all, and the pitch of the coil wire 4 can be maintained with high precision.

In addition, using such a coil sheet 3, the inner cylindrical coil 5
and an outer cylindrical coil 6 (Fig. 4).
When making a coil unit, as shown in FIG. Since the lower base (upper base) is in contact with the upper base (lower base), even if the ends 8°9 of the coil wires of the inner cylindrical coil 5 and the outer cylindrical coil 6 are misaligned, both This makes it easier to attach the welding auxiliary wire that connects the ends 8 and 9. In other words, in the case of an inner cylindrical coil and an outer cylindrical coil using a coil tension made of flat wire, as shown in FIG. Attaching the auxiliary wire will be difficult. However, the coil sheet 3 according to this invention
(Fig. 3 1), the welding assistance is within the range shown by the hatching in Fig. 5 and within the range where the end 9 of the coil wire of the outer cylindrical coil 6 is moved one pitch to the left from that state. Since the wire is attached within the range, even if the end of the coil wire is misaligned, the welding auxiliary wire 12 can be attached as shown in FIG.
can be easily installed.

〔Effect of the invention〕

In the iron-free armature coil sheet of the present invention, a plurality of coil wires each having a trapezoidal cross-sectional shape are arranged side by side so that the upper bases of the trapezoids are alternately oriented in opposite directions, thereby preventing twisting. Even if the wires are applied, the coil wires will be held together by the wedge principle, and the wires will no longer be tilted.

[Brief explanation of drawings]

Fig. 1 is an end view of a conventional coil sheet, Fig. 2 is an explanatory view of the coil sheet in a state where a twist is added to it, Fig. 3 is an end view of an embodiment of the present invention, and Fig. 4 is an end view of a conventional coil sheet. Fig. 5 is a partially enlarged plan view of the end face of the coil unit, Fig. 6 is a partially enlarged plan view of the end face of the coil unit using the conventional example, and Fig. 7 is a welded version of Fig. 5. It is a state diagram with an auxiliary line attached. 3... Coil sheet 4... Coil wire agent Patent attorney Takehiko Matsumoto

Claims (1)

[Claims] (1) A coil sheet for an iron-free armature, characterized in that a plurality of coil wires each having a trapezoidal cross-sectional shape are arranged in parallel so that the upper bases of the trapezoids alternate in opposite directions.