Electric power tool
AssigneeMakita Corporation
InventorsRyosuke SUZUKI, Akira NIWA
Life of this patent
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Abstract
An electric power tool is configured to drive a tool bit. The electric power tool includes a motor that includes a stator and a rotor. The stator includes a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator. The rotor is rotatable with respect to the stator. The rotor includes a rotor core and a rotation shaft. The first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.
Claims16
An electric power tool configured to drive a tool bit, comprising:
- a motor that includes:
- a stator including a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator;
- and
- a rotor rotatable with respect to the stator, the rotor including a rotor core and a rotation shaft, wherein
- the first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.
An electric power tool configured to drive a tool bit, comprising:
- a motor that includes:
- a stator including a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator;
- and
- a rotor rotatable with respect to the stator, the rotor including a rotor core and a rotation shaft, wherein
- the first insulator and the second insulator engage with one another to be secured to the stator core.
An electric power tool configured to drive a tool bit, comprising:
- a motor that includes:
- a stator including a cylindrical stator core and an insulator, the stator core including an inner peripheral side with a slot, the insulator including a fitting portion disposed to protrude on a ring portion installed on an end surface of the stator core, the fitting portion fitting to the slot;
- and
- a rotor rotatable with respect to the stator, the rotor including a rotor core and a rotation shaft, wherein
- a groove is depressed along an outer periphery of the protruding part of the fitting portion on the ring portion.
An electric power tool configured to drive a tool bit, comprising:
- a motor that includes:
- a stator including a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator;
- and
- a rotor rotatable with respect to the stator, the rotor including a rotor core and a rotation shaft, wherein
- a first insulation paper is interposed between the stator core and the coil in the slot, and a second insulation paper is disposed integrally with or independent of the first insulation paper on a center side of the stator core with respect to the coil, the second insulation paper overlaps with the first insulation paper in a radial direction of the stator core.
Dependencies are inferred from the claim text.