JPS5989552A - Motor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor having an improved structure for assembling a brush lead wire insulator to a yoke used in a motor such as a starter.

In conventional assembly, taking a starter as an example, first a field pole that applies a magnetic field to the armature is attached to a hollow cylindrical yoke that forms the outer shell of the motor in the motor component. Next, the brush lead wire, which has two branches on one side, is inserted into the U-shaped section (1) of the arc-shaped insulator, and in that state, it is inserted into the yoke, and several places around the inner circumference of the yoke are squeezed and fixed using a large press machine. Met. Furthermore, the conventional assembly structure requires the installation of a large press machine to tighten and fix the assembly, and has the drawback of poor assembly performance.

An object of the present invention is to simplify the structure for assembling an insulator for storing and fixing a brush lead wire to a yoke, thereby improving assemblability.

That is, the motor according to the present invention is provided with a yoke having a claw on its inner surface that is fitted and fixed, and an insulator provided with an outer peripheral part that elastically deforms when the yoke comes into contact with the claw to accommodate and fix the brush lead cotton. There is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described. 1st
The figure shows insulator 1 and brush lead cotton 2 shown in figure 2.
It is in a state where it is stored. FIG. 3 is a sectional view of the insulator 1. The insulator 1 is made of flexible resin, insulates the brush lead wire 2, and has an arc shape. 1
A is a part (2) where the brush lead wire 2 is drawn out from the connector terminal side 2a. The groove 1b engages with the claw 4C on the inner surface of the yoke 4 during assembly, and fixes the insulator 1 in the axial direction.

The recess IC branches into two brush lead wires 2, and a brush pigtail 2 with a kudzu brush 2b attached at the end that energizes the armature.
After assembling C, pinch and secure. 1d is brush pigtail 2
This is the storage section for C. The outer periphery 1e is larger than the inner diameter of the yoke 4, and when assembled, is elastically bent to the inside of the storage portion 1d to store and fix the brush pigtail 2C. Reference numeral 3 denotes a field pole using a permanent magnet, which applies rotational force while the armature is energized, and is fixed to the inner surface of the yoke 4. FIG. 4 is an assembly diagram of the insulator 1 in which the brush lead wire 2 is housed and fixed to the yoke 4, and FIG. 5 is a sectional view taken along the OA line in FIG. 4. The hole 4a of the yoke 4 is the lead-out portion 1 of the brush lead wire 2.
This is where a is inserted. Two protrusions 4b on the internal surface
holds the arc-shaped end face of the insulator 1 to prevent the inside of the insulator 1 from shifting. Several claws 4C inside the yoke 4 are provided at positions that match the grooves 1b of the insulator 1 during assembly.

(3) Next, the operation of the above configuration will be explained. The connector terminal side 2a of the brush lead wire 2 is passed through the drawer portion 1a, and the brush pigtail 2c is stored in the storage portion 1d. After fixing the field pole 3 to the inner surface of the yoke 4, the insulator 1 containing the brush lead wire 2 as shown in FIG. 1 is pushed into the yoke 4. Since the insulator 1 is made of flexible resin, when it is pushed in, the outer periphery 1e is bent inside the storage part 1d.
The yoke 4 moves forward until the groove 1d engages with several pawls 4c on the inner periphery of the yoke 4, and at the same time when the pawls 4c and the groove 1b match, the pushing of the insulator 1 is stopped by the field pole 3. In this assembled state, the outer periphery 1e of the insulator 1 is always pushing the inside of the yoke 4 by elastic restoring force as shown in FIG. 5, so the insulator 1 is fixed to the yoke 4 as shown in FIG. holds the end face, and the drawer part 1
By passing the hole 4a through the hole 4a, displacement can be prevented. Further, the brush pigtail 2 is sandwiched and fixed in the recess lc after being assembled.

Other embodiments of the present invention include the following (4): can be given.

(1) Cuts are made in several places on the outer periphery 1e of the insulator 1 to make it easier to push it into the yoke 4.

(2) The claws 4c inside the yoke are made into one continuous stepped part.

(3) The field pole 3 has a ball core and a field coil type (4) The insulator 1 is not arc-shaped but ring-shaped.

(5) If there is no lead-out portion 1a of the brush lead wire 2, only the protrusion 4b of the yoke 4 prevents the insulator 1 from shifting.

(6) If there is no protrusion 4b, the insulator 1 is prevented from shifting only by the combination of the pull-out portion 1a and the hole 4a.

(7) The insulator 1 is fixed by the grooves 1b of the insulator 1 and the claws 4c at several places on the inner surface of the yoke 7, and by providing the grooves 1b only in the portions corresponding to the claws 4c, it also serves to prevent the insulator 1 from slipping.

(8) As shown in FIG. 6, in the OB cross section of FIG. 4, (5) a support reinforcing portion 1f for the brush pigtail 2C is provided in the depression 1d which is the fixing portion of the tephra pigtail 2c.

(9) The insulator 1 is fixed in the axial direction using the groove IC and the claw 4.
C only, and do not contact the field pole.

As described above, according to the present invention, since the insulator is fixed to the yoke by the restoring force generated by the elastic deformation of the insulator, there is no need for tightening and fixing. The structure is simple and the worker can push it in and fix it by hand, which has the excellent effect of improving assembly ease.

[Brief Description of the Drawings] Fig. 1 is a combination diagram of an insulator and a brush lead wire according to the present invention, Fig. 2 is a configuration diagram of a brush lead wire, Fig. 3 is a cross-sectional view of an insulator according to the present invention, and Fig. 4 is a diagram of a combination of an insulator and a brush lead wire according to the present invention. 5 is a cross-sectional view taken along the OA line in FIG. 4, and FIG. 6 is an explanatory view of another embodiment taken along the OB cross-section in FIG. 4. l... Insulator, 1b... Groove, 1d... Storage portion, 1e... Outer periphery, 2... Brush lead wire, 3...
...Field pole, 4...Yoke, 4C...Claw. (6) Figure 1 Figure 3 e Figure 5 Figure 2 Figure 4 Figure 6

Claims (1)

[Claims] In a motor in which a brush lead wire having a brush at its tip is housed and fixed inside a yoke, an insulator is provided with an outer peripheral part for storing and fixing the brush lead wire by elastic deformation;
A motor comprising a claw provided on an inner surface of the yoke to fit and fix the insulator, and to maintain elastic deformation of the insulator.