JPS6271457A - Stator core for motor - Google Patents

Abstract

PURPOSE:To prevent winding leakage and the automatic pull-around of a crossover by simple structure by integrally fixing an end plate with a member for obviating winding leakage and a crossover guide at both ends of a core proper in which magnetic-substance plates are laminated. CONSTITUTION:In a stator core on which a stator winding is wound directly by a winding machine, end plates 12 are mounted integrally to both end surfaces of a core proper 11 formed by laminating magnetic-substance plates by rivets 13, etc. Winding support bars 12a for preventing the generation of winding leakage at a time when the stator winding is wound and crossover guides 12b for pulling around crossovers are shaped integrally to the end plate 12. Accordingly, the prevention of winding leakage and the pull-around of the crossover are conducted by using the same end plates 12 even when the thickness of laminating of the core proper 11 changes, thus enabling manufacture of small- quantity products at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a stator core of an electric motor in which a stator winding is directly wound by a winding machine.

[Technical Background of the Invention] In the case where the stator core is directly wound with a winding machine, the stator core is equipped with a winding support rod for preventing winding leakage and a crossover wire guide for routing the crossover wire. It is necessary to provide Therefore, in the past, the winding support rod and the crossover wire guide were integrally molded in a slot insulator made of synthetic resin, and the molded product was inserted and fixed to both ends of the stator core, or the stator core was injection molded with synthetic resin. The winding support rod and the crossover wire guide are directly molded onto the wire. However, such a method requires a complicated mold, which is not desirable in terms of cost, and is particularly unsuitable for small-volume production.

[Object of the Invention] This invention was made in view of the above-mentioned drawbacks of the conventional art.
The object is to provide a stator core for an electric motor that has a winding support rod and a crossover wire guide that has a simple structure and can be manufactured at low cost.

[Embodiment] Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

This stator core 10 has a core body 11 formed by laminating magnetic plates punched into a predetermined shape, and according to this embodiment, the core body 11 has six blades 11a and disposed between them. Similarly, six slots llb are formed.

According to the present invention, end plates 12, 12 are arranged at both ends of the core body 11, respectively. Each end plate 12 is preferably made of the same magnetic plate as the core sheet constituting the core body 11, and each end plate 12 has six winding support rods 12a provided at positions corresponding to the respective blade portions 11a, Six crossing rod guides 12b are formed at positions corresponding to the respective slots 12b. In this case, the winding support rod 12a and the crossing rod guide 12b are punched out integrally with the end plate 12, and are formed by bending predetermined portions thereof at substantially right angles in the same direction.

This end plate 12.12 is stacked on both ends of the core body 11,
It is assembled integrally with rivets 13, and the parts other than the inner surface (not shown) of each blade part 11a and the outer surface of the core body 11 including the end plates 12 and 12 are coated with powder made of, for example, epoxy resin for electrical insulation. will be applied.

Thereafter, the stator winding 14 is wound around the base of each blade portion 11a through the slots llb using a winding machine (not shown). As a result, the stator winding 14 can be wound in an orderly manner without causing leakage wires. Further, by providing the crossover wire guide 12b, the fixed winding 14
The crossover wire 14a can be routed in a predetermined direction using a winding machine.

In the above embodiment, the end plate 12 is made of a magnetic plate, but depending on the case, it may be made of a heat-resistant synthetic resin.

[Effects] As is clear from the embodiments described above, according to the present invention, in the stator core of an electric motor on which the stator winding is directly wound by a winding machine, the windings are attached to both ends of the core body. To prevent wire leakage during winding of a fixed winding by arranging an end plate having a support rod and a crossover wire guide, and to automatically draw the crossover wire by a winding machine. I can do it. Further, according to the present invention, it is possible to cope with changes in the stacking thickness of the core body, etc., without changing the shape, and it is particularly suitable for small-volume production products.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a stator core of an electric motor according to the present invention, and FIG. 2 is an exploded perspective view of the same stator core. In the figure, 10 is a stator core, 11 is a core body, 11a is a blade, llb is a slot, and 12 is an end plate. 12a is a winding support rod, 12b is a crossover wire guide, 13 is a rivet, 14 is a stator winding, and 14a is a crossover wire.

Claims (3)

[Claims] (1) In the stator core of an electric motor, on which the stator winding is directly wound by a winding machine, a core body made of laminated magnetic plates punched into a predetermined shape is equipped with winding leakage prevention caps at both ends. A stator core for an electric motor, characterized in that end plates having a winding support rod and a crossover wire guide for routing the crossover wire are stacked and fixed integrally. (2) In claim (1), the end plate is integrally punched out of a magnetic plate in a form including the winding support rod and the crossover wire guide, and both the winding support rod and the crossover wire guide are A stator core of an electric motor characterized by being bent at right angles in the same direction. (3) Claim (1) is characterized in that the core body including the end plate is coated with electrically insulating powder coating except for the inner surface of the blade portion and the outer surface of the core body. Stator core of electric motor.