JPS5829585B2 - armature - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an armature having a commutator, and its purpose is to eliminate the riser conventionally provided on the commutator and provide an armature that firmly fixes the armature coil. It is something to do.

The following description will be made based on one drawing.

FIGS. 1 and 2 are a side view and a front view showing a conventional connection between an armature coil and a commutator.

In the figure, 1 is a commutator manufactured by arranging segments 2 having an annular cross-section and filling them with a synthetic resin molding material P, and has a riser 3.

This riser 3 has a groove 2A to which the armature coil 4 is connected.

This commutator 1 is fixed to a rotating shaft 5 via a bush 6.

On the other hand, the end of the armature coil 4 fixed to the rotation shaft 5 and attached to the core having a slot is connected to the riser 3.
are inserted into the two grooves and connected by soldering.

A binding wire 7 made of piano wire is attached to the outer periphery of the armature coil 4 to prevent the coil 4 from flying out due to centrifugal force or the like during rotation.

In such a conventional armature, the commutator 1 has a riser 3 and must have grooves 2A, so the manufacturing process is complicated, the material yield is poor, and the commutator is expensive.

Also, after inserting the armature coil 4 into the two grooves of the riser 3,
In order to compress the outermost periphery of the two grooves to help prevent the coil 4 from flying out, the two grooves are made larger than the outermost periphery of the coil 4 by l.

Therefore, bind 7 had to be placed 41 points away from riser 3.

Generally, when the armature rotates, the connection between the commutator and the armature coil tends to separate due to centrifugal force, and the most effective way to do this is to bind the connection.

but. Due to the above structure, it is not possible to bind the part that is most exposed to centrifugal force, and in order to cover it, the binding wire 7 must be made of a material with strong rigidity such as piano wire, which makes work easier. was bad.

FIG. 3 is a half-sectional side view showing the connection between the armature coil and the commutator of the armature of the present invention, and FIG. 4 is a part of the front view of FIG. 3.

Part 3 below. The present invention will be explained in detail in FIG. 4 (however, the same reference numerals as in FIGS. 1 and 2 are equivalent animals).

), the mold material P integrally forms an L-shaped coil guide plate P0 on the electric machine coil 4 side.

This guide plate has a groove P3 at least equal to the insertion width of the armature coil 4, and its depth is set so that the outer diameter of the guide plate and the outer diameter of the coil are approximately equal when the armature coil is inserted and set. be.

Segment 2 is also generally straight and conventional.

No riser is actively provided, and the armature coil 4 is positioned entirely by the guide plate P1 described above.

Therefore, to connect the armature coil 4 and commutator 1, first insert the lower coil 41 of the armature coil along the groove P3 of the guide plate P1, abut it on the connection part 21 of the segment 2, and then insert the upper coil 42 thereon. It is mounted and integrally plated with tin, for example, and then fixed by electric resistance welding.

Thereafter, as shown in FIG. 3, a bind 71 impregnated with a thermosetting resin is applied so as to cover the outer periphery of the tip of the armature coil 4 and the outer periphery of the guide plate P□.

This bind 71 is a fibrous member (actually, a glass tape is used).

) is used as a base material, and at the same time as the armature is treated with varnish, it is impregnated with varnish and hardened.

According to the embodiments described above: (1) Since the riser has become extremely small, the cost of the commutator can be reduced to half of the conventional cost.

(2) Since the binding can be applied even to the armature coil connected to the commutator, it is possible to effectively prevent the armature coil from flying out from the commutator due to centrifugal force, resulting in poor connection.

(3) Workability is improved by switching the connection between the commutator and armature coil from soldering to welding.

(4) Since the binding material is changed from piano wire to a fibrous member, workability is improved, and since the member shrinks when heated, it can be fixed more firmly.

As described above, the present invention makes it possible to easily and firmly fix the armature coil without actively providing a commutator riser.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the connection between the armature coil and commutator of a conventional armature, and FIG. 2 is a front view of FIG. 1. FIG. 3 is a side view showing the connection between the armature coil and the commutator of the armature of the present invention, and FIG. 4 is a front view of FIG. 3. Explanation of symbols, 1... Commutator, 2... Riser, 2 people... Groove, 3... Segment, 4... Electric machine Child coil 5...Axis,
7... Bind.

Claims (1)

[Claims] 1. In an armature coil that is inserted into a slot of an armature core, a commutator segment that connects one end of the armature coil, and a bind that is wound around the outer periphery of one end of the armature coil. , the segments have substantially the same outer diameter in the longitudinal direction, one end of the segment has an armature coil directly fixed by welding, and the outer periphery of the armature coil located directly above the welded part is made of thermosetting shrinkable resin. An armature characterized by being wound with a fibrous band impregnated with.