POWER TOOL
First Claim
1. A power tool comprising:
- a commutator motor including a rotor and a stator having a substantially cylindrical stator core;
a fan that is provided to face one axial end of the stator core, that has a plurality of blades and that is rotatable coaxially with the rotor; and
a stator coil bundle that includes a bundle of magnetic wires and that is fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the one end of the stator core in a rotational axis direction of the rotor,wherein, with respect to the rotational axis direction, a minimum internal diameter of the coil end portion is smaller than a maximum external diameter of the fan, andwherein the coil end portion has a fan facing portion that faces the fan along a direction perpendicular to the rotational axis direction.
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Accused Products
Abstract
According to an aspect of the invention, there is provided a power tool including: a commutator motor including a rotor and a stator having a substantially cylindrical stator core; a fan provided to face one axial end of the stator core so as to be rotatable coaxially with the rotor; and a stator coil bundle fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the stator core in a rotational axis direction of the rotor, wherein a minimum internal diameter of the coil end portion is smaller than a maximum external diameter of the fan, and wherein the coil end portion has a fan facing portion that faces the fan along a direction perpendicular to the rotational axis direction.
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Citations
15 Claims
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1. A power tool comprising:
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a commutator motor including a rotor and a stator having a substantially cylindrical stator core; a fan that is provided to face one axial end of the stator core, that has a plurality of blades and that is rotatable coaxially with the rotor; and a stator coil bundle that includes a bundle of magnetic wires and that is fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the one end of the stator core in a rotational axis direction of the rotor, wherein, with respect to the rotational axis direction, a minimum internal diameter of the coil end portion is smaller than a maximum external diameter of the fan, and wherein the coil end portion has a fan facing portion that faces the fan along a direction perpendicular to the rotational axis direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power tool comprising:
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a commutator motor including a rotor and a stator having a substantially cylindrical stator core; a fan that is provided to face one axial end of the stator core, that has a plurality of blades and that is rotatable coaxially with the rotor; and a stator coil bundle that includes a bundle of magnetic wires and that is fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the one end of the stator core in a rotational axis direction of the rotor, wherein the coil end portion is substantially plate-shaped, and wherein the coil end portion is formed so that an internal diameter thereof with respect to the rotational axis direction increases from a base portion that is positioned in the vicinity of the stator core toward a protruding end portion.
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13. A power tool comprising:
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a commutator motor including a rotor and a stator having a substantially cylindrical stator core; a fan that is provided to face one axial end of the stator core, that has a plurality of blades and that is rotatable coaxially with the rotor; and a stator coil bundle that includes a bundle of magnetic wires and that is fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the one end of the stator core in a rotational axis direction of the rotor, wherein the fan includes a centrifugal fan, wherein, with respect to the rotational axis direction, a maximum external diameter of the coil end portion is greater than or equal to a maximum external diameter of the stator core, and wherein the coil end portion forms a fan guide that defines a air flow path toward the centrifugal fan.
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14. A power tool comprising:
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a commutator motor including a rotor and a stator having a substantially cylindrical stator core; a fan that is provided to face one axial end of the stator core, that has a plurality of blades and that is rotatable coaxially with the rotor; and a stator coil bundle that includes a bundle of magnetic wires and that is fixed to an inner peripheral surface of the stator core, the stator coil bundle having a coil end portion that protrudes more than the one end of the stator core in a rotational axis direction of the rotor, wherein at least the coil end portion of the stator coil bundle is resin-molded, and wherein the coil end portion is formed so that an internal diameter thereof with respect to the rotational axis direction increases from a base portion that is positioned in the vicinity of the stator core toward a protruding end portion. - View Dependent Claims (15)
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Specification