Leading-out device for a lead wire of a DC motor and a method of leading out a lead wire
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKyohei Yamamoto, Shuzou Isozumi
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Abstract
The end of a lead wire of a DC motor composed of twisted wires is formed into a flat shape by welding the twisted wires together, and is inserted or installed through a grommet with the smaller or shorter dimension of the flat shape oriented in the axial direction of the motor.
Claims19
A lead-out arrangement for passing an electrical conductor of a DC starter motor of an internal combustion engine through a generally cylindrical housing thereof, comprising:
- a) a resilient grommet disposed in an aperture in a side of the housing,
- b) an electrical conductor composed of a plurality of twisted wires, said wires being metallurgically bonded together to form a solid, unitary lead at an end portion of the conductor extending through the grommet and into an interior of the housing, perpendicular thereto,
- c) said end portion defining, in cross-section, a generally flattened shape having a larger, width dimension oriented perpendicular to an axis of the housing and a smaller, thickness dimension oriented parallel to the housing axis,
- d) an inner conductor of the motor disposed within the housing at a terminus of the end portion, and
- e) a weld establishing electrical connection between said inner conductor and said terminus.
A method of leading a twisted wires electrical conductor through an aperture in a side of a generally cylindrical housing of a DC starter motor, comprising the steps of:
- a) disposing a resilient grommet in the aperture,
- b) metallurgically bonding the twisted wires together to form a solid, unitary lead at an end portion of the conductor such that said end portion defines, in cross-section, a generally flattened shape,
- c) inserting the end portion through the grommet and into an interior of the housing such that a larger, width dimension of the flattened shape is oriented perpendicular to an axis of the housing and a smaller, thickness dimension is oriented parallel to the housing axis, and
- d) welding a terminus of the end portion to an inner conductor of the motor disposed within the housing.
A method of leading a twisted wires electrical conductor through an aperture in a side of a generally cylindrical housing of a DC motor, comprising the steps of:
- a) metallurgically bonding an end of the twisted wires electrical conductor to form a solid, unitary lead at an end portion of the conductor having a generally flattened shape,
- b) protruding the end portion by a predetermined dimension and integrally molding a resin with the end portion to form a grommet,
- c) installing the grommet and integral end portion in the aperture of the motor housing from the outside of the motor such that a larger, width dimension of the flattened shape is oriented perpendicular to an axis of the housing and a smaller, thickness dimension is oriented parallel to the housing axis, and
- d) metallurgically bonding a terminal of the motor to the protruded end portion.
Dependencies are inferred from the claim text.