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US 11,453,109 B2Granted
Power tool
AssigneeMakita Corporation
InventorTatsuo Nakashima
Life of this patent
Estimating the term…
Abstract
The durability of a reduction mechanism is improved. An impact wrench includes a brushless motor, a sun gear rotatable by the brushless motor, a planetary gear meshing with the sun gear, an internal gear meshing with the planetary gear and having a first recess on an outer circumference, a gear case holding the internal gear and having a second recess on an inner circumference, a spindle holding the planetary gear, and a pin disposed in the first recess and in the second recess.
Claims14
A power tool, comprising:
- a motor;
- a sun gear rotatable by the motor;
- a planetary gear meshing with the sun gear;
- an internal gear meshing with the planetary gear, the internal gear having first recesses on an outer circumference;
- a gear case holding the internal gear, the gear case having second recesses on an inner circumference;
- a spindle holding the planetary gear;
- a first pin in one of the first recesses and in one of the second recesses, the first pin being elastically deformable;
- and
- a second pin in another of the first recesses and another of the second recesses, the second pin being elastically undeformable.
6 more elements
A power tool, comprising:
- a motor;
- a sun gear rotatable by the motor;
- a planetary gear meshing with the sun gear;
- an internal gear meshing with the planetary gear, the internal gear including a tab member on an end face of the internal gear in an axial direction;
- a gear case holding the internal gear, the gear case including a receiver to receive the tab member;
- a spindle holding the planetary gear;
- and
- an elastic piece between the internal gear and the gear case,
- wherein the elastic piece is deformable elastically in a circumferential direction of the internal gear to allow the tab member to come in contact with the receiver.
6 more elements
Dependencies are inferred from the claim text.