Power tool
AssigneeMakita Corporation
InventorsYoshitaka MACHIDA, Taro HISANO
Life of this patent
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Abstract
A power tool has a motor, a rotary shaft and a housing. The rotary shaft has a first end portion on a first direction side and a second end portion on a second direction side in an axial direction of the rotary shaft. The housing is configured to store a lubricant on the first direction side of the first end portion of the rotary shaft. The rotary shaft has a first hole and a second hole. The first hole extends in the axial direction and that has a first opening in the first end portion of the rotary shaft. The second hole extends in a direction crossing an axis of the rotary shaft, that communicates with the first hole. The second hole has a second opening in an outer peripheral surface of the rotary shaft. A spiral part is provided within the first hole.
Claims17
A power tool, comprising:
- a motor;
- a rotary shaft that is rotationally driven by the motor and that has a first end portion on a first direction side and a second end portion on a second direction side opposite to the first direction side in an axial direction of the rotary shaft;
- and
- a housing that houses the rotary shaft and into which a lubricant is introduced, the housing being configured to store the lubricant on the first direction side of the first end portion of the rotary shaft,
- wherein:
- the rotary shaft has:
- a first hole that extends in the axial direction of the rotary shaft and that has a first opening in the first end portion of the rotary shaft, and a second hole that extends in a direction crossing an axis of the rotary shaft, that communicates with the first hole on the second direction side of the first opening, and that has a second opening in an outer peripheral surface of the rotary shaft, and
- a spiral part is provided within the first hole.
Dependencies are inferred from the claim text.