Insulating member for a core of a motor
AssigneeFanuc Corporation
InventorsHiroyuki Uchida, Tomonaga Yamamoto, Takeshi Tamaki
Life of this patent
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Abstract
An insulating member (10), which is disposed in each of slots (20) in a stator core (16) of a motor in order to insulate electrically the core (16) and windings (22) set in the slots (20), comprises a main insulating section 30, which covers the inner wall surface of the slot (20), and auxiliary insulating sections (32) having desired flexibility and flexural repulsiveness to substantially close and opening (26) of the slot. The auxiliary insulating sections (32) are easily deformed to allow the slot opening (26) to open partially when it is subjected to an external force, and are restored to their original state such that the opening (26) is closed when the external force is removed.
Claims8
A single insulating member for a core of a motor, the single insulating member electrically insulating a stator core of the motor, formed with a plurality of sets of slots and slot openings arranged in a circumferential direction thereof so that teeth are formed between the adjacent slots, and windings are set in the slots, comprising:
- n main insulating sections which have boundary lines on either side thereof, extending substantially parallel to the axial direction of the stator, and a region capable of covering the whole inner wall surface of a slot extending parallel to the axial direction of the stator;
- and
- n auxiliary insulating sections integrally extending from said individual boundary lines on either side of each of the main insulating sections, in directions perpendicular to the axial direction of the stator, and having the respective distal end edges thereof butting on or overlapping each other in the center of the slot opening, thereby substantially closing said slot opening,
- wherein said n auxiliary insulating sections are formed of a material such that a region thereof or a region in the vicinity thereof is deformed to open the slot opening partially when an external force of a magnitude of at least a predetermined level is applied to the region and is restored to the original form thereof to close the slot opening when the external force is removed, and
- wherein n is equal to the number of slots in the core.
A method for forming an insulating member for a motor core, comprising:
- (a) locating a stator core of a motor, which is formed with a plurality of sets of slots and slot openings arranged in a circumferential direction, as an insert in a mold so that annular spaces are defined between the mold and the stator core, along respective inner peripheral walls of the individual slots and an inside of the slot openings continuous therewith;
- (b) forming an insulating member integrally with the stator core by injecting a resin material into each of said defined annular spaces and solidifying the material;
- and
- (c) rupturing, along the axial direction of the stator core, the portion of said insulating member which faces the inside of the slot opening when setting windings in the stator core.
Dependencies are inferred from the claim text.