Coil insertion method and coil insertion device

Abstract

The invention relates to a coil insertion method and a coil insertion device. In the process of embedding a polyphase coil in a stator core groove and under the state that a coil curve part protrudes from the stator core top end, the curve part is expanded towards the direction deviating a stator core axle center, and the coil at the lower part and the coil at the upper part do not conflict with each other. The coil insertion device is provided with a coil end expansion means implementing the above method. Even when a polyphase coil is inserted, a coil insertion method and a coil insertion device which can reduce the height of the coil at the end part which protruding from the stator core end face.

Description

technical field [0001] The present invention relates to a coil insertion method and a coil insertion device for inserting a pre-wound coil into a slot of a stator core, and more specifically relates to an expansion process and an expansion method for an inserted coil end. Background technique [0002] A conventional coil insertion device for inserting a coil into a stator core slot and a coil insertion method using the device are well known. The coil insertion method has better workability than the direct winding method, but has a disadvantage that the height of the end coil protruding from the end surface of the stator core is high. [0003] In order to solve this problem, Japanese Patent Application Publication No. 2003-230258 introduced movable brandy grooves and fixed brandy grooves around the embedding wire stripper, only by increasing the thickness of the movable brandy grooves that move synchronously with the embedding wire strippers. The technology of increasing the...

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Problems solved by technology

[0004] However, when the above-mentioned coil insertion method is adopted, the coil insertion mechanism must have a movable brand groove in addition to the fixed brand groove and the embedded wire stripper, which increases the number of parts.

Also, when the above-mentioned coil insertion method is applied to multi-phase coils inserted at the same time, the coils hung on the thicker brandy grooves will make the end coils become taller due to the thickness, so the above-mentioned technique is not suitable for multi-phase coils. Phase coil insertion

[0005] In addition, even if the thickness of the brandy slot is not thick, when the multi-phase coils are inserted at the same time, because the inner side of the upper end curve of the coil inserted into the slot first will conflict with the outer side of the upper end curve of the coil inserted into the slot later, other equipment must be used to adjust The part where the coil is expected to collide is inserted first and shaped to form a curved shape, so the coil at the end becomes taller

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