JPS58136252A - Miniature induction motor - Google Patents

Abstract

PURPOSE:To reduce the number of parts to be assembled and to simplify the assembling work of an induction motor by superposing a pair of cores engaged with bobbins, on which coils are wound at both ends in a cross shape and associating the cores with a yoke having projections at an interval of 90 deg. at the inner periphery. CONSTITUTION:A pair of cores, each of which is formed by engaging both ends of a core 3 produced by laminating a plurality of core plates with a bobbin 6, on which a coil 7 is wound in advance, are formed, and a yoke 1 is formed by laminating a plurality of yoke plates having projections 2 at an interval of 90 deg. at the inner periphery. The cores 3 include one main pole and the other interpole. Since a pair of cores 3 engaged with the bobbin 6 are mounted on the yoke 1, the cores 3 are mounted to the yoke 1 in a cross shaped by press-fitting the projections 2 formed at an interval of 90 deg. at the inner periphery of the ring- shaped yoke 1 at the notches 5 of both ends of the cores 3. In this manner, the number of parts to be assembled can be reduced, and the assembling work can be simplified.

Description

[Detailed Description of the Invention] The present invention relates to a small-sized induction motor J machine, and its purpose is to simplify the winding work and reduce the assembly cost by winding the coil around the bobbin in advance. To provide a small guide tip.

Conventional small 1N! 4 electric motor, a small induction motor was manufactured by inserting a pre-wound coil into a coil groove provided in a stator core.

However, in the case of small-sized induction motors with low output or high voltage, this manufacturing method reduces the wire diameter of the coil, so there is a risk of wire breakage when inserting the coil. It requires interlayer insulating paper to insulate the main coil and auxiliary coil,
Furthermore, it is necessary to perform a shaping operation to make the coil end have a predetermined size and shape, and a binding operation for the coil end to prevent the coil from becoming disordered.

The present invention simplifies these complicated assembly operations and provides a small-sized induction motor with fewer assembled parts, and will be described below with reference to FIG. IIK. Figure 1 is a plan view of the inside of a small paddy 4 electric motor based on an unexploded 8AK, and Figure 2 is an AOA of the 1st figure.
It is a sectional view at K. +11 in Figures 1 and 2
+81i31 has a hole (4) for the rotor in the center, and a strip with a notch $f61 (Il) at the tip. Iron core made of stacked iron core plates, +4 + 1 is fill (
7) is a bobbin that is wrapped with electrically insulating material.

In addition, fllll#''i rotor, (9) is a lead wire.

Compact # according to the present invention with the above configuration! The conductive motor is assembled as follows. First, a coil (
A pair of bobbins (6) wound with 7) are made, and a yoke +1+ is made by stacking a plurality of other yoke plates. It is assumed that one of the pair of iron cores +31+31 is used for the main magnetic pole and the other for the complementary magnetic pole.

Therefore, the iron core t31t31 into which the bobbin (6) is fitted
In order to attach the pair to the yoke, press-fit the protrusions m tel fil provided at 901i1 intervals into the inner periphery of the ring-shaped yoke f1+ at the notches t5i (6) at both ends of the iron core +3++ll. ll a pair of yoke (1
) in a cross shape. It is assumed that the thickness of the yoke +1) and the sum of the thickness of the iron core +31F3+ pair are equal.

Next, the rotor (8) is attached inside the rotor hole (4) of the iron core +31 (3).

The small-sized induction bolting machine of the present invention, which can be easily assembled, is made of a pair of bobbins with pre-wound coils inserted into both ends of an iron core made by stacking a plurality of iron core plates. A made by stacking multiple N iron plates with protrusions on the a! By press-fitting the iron protrusion into the notch at the tip of the iron core, the iron core and yoke are integrated in a cross shape, and both 11i'i main magnetic poles of one iron core and both ends of the other iron core are used as auxiliary magnetic poles. This eliminates all of the drawbacks of the conventional small electric conduction motor of this type as described above, and it is easy to assemble and has a low assembly cost.

[Brief explanation of the drawing]

Figure 1 is a plan view of the inside of the small IW calyx electric auxiliary device according to the present invention, and Figure 2 is a sectional view taken along A-0-A in Figure 1.

Claims (1)

[Claims] +11 An iron core is formed by stacking strip-shaped iron core plates with a hole for the rotor in the center and a notch at the tip, and a yoke is formed by stacking ring-shaped yoke plates with projections at 90 intervals inside. The pair of iron cores each having a bobbin on which a coil has been previously wound are fitted from both ends are stacked in a cross shape,
A small induction motor characterized in that one of the iron cores is used as a main pole iron core and the other is used as a submagnetic pole iron core, and a protrusion of the yoke is press-fitted into the yoke into a notch at the tip of the iron core. .