JPS609355A - Field magnet unit of rotary electric machine - Google Patents

Abstract

PURPOSE:To improve the vibration resistance by inserting wedge-shaped bush attached to a yoke between magnets to hold the magnets by a pressed and expanded pipe material. CONSTITUTION:A projection 1a is projected on the inner periphery of a yoke 1. A wedge-shaped stationary member 4 formed on nylon of nonmagnetic material is axially and radially immovably engaged fixedly with the projection 1a of the yoke 1 via a recess 4a formed on the lower surface. A thick pipe material 3 is inserted between field magnets 2, and a stationary member 3a is formed at the material 3. The magnet 2 is interposed fixedly between the member 3a and the member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a field magnet device for a rotating electric machine, and particularly to a means for fixing a magnet.

Conventionally, the common method for fixing field magnets to the corks of rotating electric machines such as starters has been to use adhesives, and in rare cases they have also been fixed using springs, etc. However, adhesives and springs are not sufficient. There was a drawback that vibration resistance could not be ensured.

In order to solve the above-mentioned drawbacks, the present invention creates a strong field magnet with sufficient vibration resistance by sandwiching the magnet between a wedge-shaped bush attached to a yoke and a pipe material inserted between the magnets and suppressed and expanded. One of its objectives is to provide equipment.

Embodiments of the present invention will be described below with reference to embodiments not shown in the drawings. FIG. 1 is a partially cross-sectional horizontal hole diagram showing the configuration of an embodiment of the field magnet device for a rotating electrical machine according to the present invention, and FIG. 2 is a schematic diagram of the inner peripheral surface of the field magnet device shown in FIG. 1 partially opened. In the figure, l is a yoke made of magnetic material, 1a is a protrusion formed on the inner peripheral surface of IJ yoke 1, and 4 is a non-e eye? A wedge-shaped fixing member made of nylon or the like is fixed to the protrusion 1a of the yoke in a recess 4a formed in the surface so as not to be movable in the axial and radial directions;
It is inserted between two field magnets and brought into contact with the radial side surface of the magnet 2, and the axial side surface of the magnet 2 is supported by the support part 4b, making it impossible for the magnet to move in the axial direction. It should be fixed so that it does. 3 has a uniform wall thickness inserted between the field magnets 2.
A pipe material made of non-magnetic material such as aluminum or brass is pressed until it becomes approximately equal to the radial thickness of the field magnet 2 to form the fixing member 3a and generate a pressing force between the two field magnets 20. There is. Reference numeral 5 denotes a through bolt, which is passed through the hollow part of the fixing member 3a made of the pipe material, and is used to fix the yoke 1 to an end frame housing (not shown) or the like. The pipe material may have an elliptical shape, a polygonal shape, etc. in addition to the cylindrical shape, as long as it is a material with a uniform thickness that can be compressed.

As described above, in the field magnet device for a rotating electrical machine according to the present invention, a wedge-shaped fixing member made of a non-magnetic material is fixed to a projection formed on the inner circumferential surface of a yoke, and a wedge-shaped fixing member made of a non-magnetic material is Since the field magnet is clamped and fixed between the fixing member formed by pressing a pipe material with a uniform wall thickness, the deformation pressing force of the fixing member made of the pipe material, the wedge-shaped fixing member, and the pipe material are This has a great effect in that the field magnet can be firmly fixed to the yoke by the wedge surface of the fixing member, and has a great effect in that it has sufficient vibration resistance.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a partial cross-sectional schematic diagram showing the configuration of an embodiment of a field magnet device for a rotating electric machine according to the present invention, and FIG. 2 is an internal view of the field magnet device shown in FIG. FIG. 3 is a partially exploded view of the circumference. DESCRIPTION OF SYMBOLS 1... Yoke, 2... Field magnet, la... Protrusion, 4... Wedge-shaped fixing member +4a... Recessed part,
3... Vibrator material, 3a... Pressed fixing member, 4
b...Support part, 5...Through z1! 'Ruto. Representative Patent Attorney Takashi Okabe Figure 1 Figure 2

Claims (1)

[Claims] A fixing member having a wedge surface between it and a magnet made of a non-magnetic material fixed to a projection formed by punching out on the inner peripheral surface of the yoke, and a material of uniform thickness made of a non-magnetic material (for example, a pipe material)
A field magnet device for a rotating electric machine, characterized in that a field magnet is clamped and fixed between a fixing member formed by pressing a field magnet.