JPH09131026A - Stator structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retain a magnet board firmly and surely to a stator molded item, by setting a magnet board in the opening of a stator molded item, and setting a magnet board in a V groove, and also, bringing a salient tongue piece provided at the stator molded item into elastic contact with the rear of the magnet board. SOLUTION: A plurality of openings 5 are made at the periphery of a stator molded item 1. A magnet plate 5 arc in sectional form is fitted in the opening 2. The straight nonarc-shaped face 5a of the magnet plate 5 is set in a V groove 3a, and a salient tongue piece is in elastic contact with the rear 5b of the magnet plate 5, and it pushes the magnet plate 5 outward, and suppresses the backlash of the magnet plate 5, being pressed by the outer case 6 provided at the periphery of the stator molded item 1. As a result, the angle in axial direction and circumferential direction of the magnet plate 3 can be decided accurately, performing the positioning of the magnet plate 5 of the magnet plate 5 simply and accurately without using an adhesive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator structure, and more particularly to a novel improvement for fitting a magnet plate to a molded stator body to obtain a stator.

[0002]

2. Description of the Related Art As a conventional stator structure of this type, generally, a method of positioning and adhering a magnet plate to the outer circumference of a cylindrical or cylindrical rotor by using a jig or a mold is used. Although a method of attaching a thin plate spring to a molded stator body to hold the magnet plate has been used, in practice, a bonding method has been widely used.

[0003]

Since the conventional stator structure is configured as described above, there are the following problems. That is, a jig is required to accurately position the magnet plate at a predetermined position of the rotor, and it is difficult to handle the adhesive at the time of bonding, which is a great obstacle in mass production. Further, in the structure in which a thin spring is assembled to the stator molded body to hold the magnet plate, it is extremely difficult to maintain the reliability of holding the magnet plate during rotation as the number of parts increases.

The present invention has been made to solve the above problems, and particularly provides a stator structure in which a magnet plate is fitted to a molded stator body to obtain a stator. The purpose is to

[0005]

A stator structure according to the present invention comprises a molded stator body, a plurality of openings formed in the peripheral surface of the stator body, and an axial direction formed between the openings. Magnet holders, V-shaped grooves formed in the magnet holders, protruding tongues formed on the end side of the stator molded body, and magnets fitted in the openings and having an arc-shaped cross section. A plate, the magnet plate is fitted in the V-shaped groove, and the protruding tongue is elastically contacted with the back surface of the magnet plate.

More specifically, the stator molded body is provided with an outer case. Therefore, when the magnet plate is fitted into the opening of the stator molded body, this magnet plate is V-shaped formed in the magnet holder of the opening.
Since the projecting tongue provided on the stator molded body makes elastic contact with the back surface of the magnet plate while fitting into the mold groove,
Each magnet plate is firmly and reliably held by the stator molded body.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the stator structure according to the present invention will be described below in detail with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral 1 denotes a tubular stator molded body which is resin-molded by a well-known molding means, and a plurality of openings 2 are formed on the peripheral surface of the stator molded body 1. ing. A magnet holder 3 having a thickness corresponding to the thickness of the stator body 1 is formed between the openings 2, and the magnet holder 3 is formed in a V shape on both sides in the circumferential direction. The formed V-shaped groove 3a is formed along the axial direction. A protruding tongue piece 4 projects in the axial direction on the end 1a side of the stator molded body 1, and the inner surface 1 of the stator molded body 1
It is integrally formed on the b side.

A magnet plate 5 having an arc-shaped cross section is fitted in the opening 2, and a linear non-arc surface 5a of the magnet plate 5 is fitted in the V-shaped groove 3a. However, the protruding tongue 4 is the back surface 5 of the magnet plate 5.
Since the magnet plate 5 is elastically contacted with b, the magnet plate 5 is pushed outward and pressed by the outer case 6 provided on the outer periphery of the stator molded body 1, so that the rattling of the magnet plate 5 is suppressed. Although the above-mentioned protruding tongue piece 1a is described only on one end side, it may be provided on both end sides.

[0009]

Since the stator structure according to the present invention is constructed as described above, the following effects can be obtained. That is, by fitting the magnet plate into the opening formed integrally with the stator molded body, the positioning of the magnet plate can be performed easily and accurately without using an adhesive, and the magnet plate can be positioned in the axial and circumferential directions. The angle is accurately determined, and the V-shaped groove of the opening holds the magnet plate so that it does not fall inward, and the protruding tongue allows the magnet plate to be pressed against the outer case to prevent rattling of the magnet plate.

[Brief description of the drawings]

1 is a cross-sectional view showing a stator structure according to the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

[Explanation of symbols]

 1 Stator Formed Body 2 Opening 3 Magnet Holder 3a V-shaped Groove 4 Projecting Tongue Piece 5 Magnet Plate 5b Back Side 6 Outer Case

Claims (2)

[Claims] 1. A molded stator body (1) formed by molding.
A plurality of openings (2) formed in the peripheral surface of the stator molded body (1), a magnet holder (3) formed between the openings (2) and extending in the axial direction, Magnet holder
V-shaped groove (3a) formed in (3) and the stator molded body (1)
Protruding tongue piece (4) formed on the end (1a) side of the opening (2)
And a magnet plate (5) having an arc-shaped cross section
The magnet plate (5) is configured to fit into the V-shaped groove (3a) and the protruding tongue (4) is elastically contacted with the back surface (5b) of the magnet plate (5). Stator structure to 2. The stator structure according to claim 1, wherein a cylindrical outer case (6) is provided on the outer periphery of the stator molded body (1).