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US 2020/0215678 A1Published application
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.
Claims20
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 a first recess on an outer circumference;
- a gear case holding the internal gear, the gear case having a second recess on an inner circumference;
- a spindle holding the planetary gear;
- and
- at least one pin disposed in the first recess and in the second recess.
5 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 having a first recess on an outer circumference;
- a gear case holding the internal gear, the gear case having the second recess on an inner circumference;
- a spindle holding the planetary gear;
- and
- at least one pin disposed in the first recess and in the second recess, the pin being elastically deformable when the internal gear rotates with respect to the gear case.
5 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;
- a gear case holding the internal gear;
- a spindle holding the planetary gear;
- at least one tab member arranged on one of the internal gear or the gear case;
- at least one receiver arranged on the other of the internal gear or the gear case to receive the tab member;
- and
- at least one elastic piece located between the internal gear and the gear case,
- wherein the elastic piece deforms elastically in a circumferential direction of the internal gear to allow the tab member to come in contact with the receiver.
8 more elements
Dependencies are inferred from the claim text.