Impact tool
AssigneeMakita Corporation
InventorsRyunosuke Kumagai, Tokuo Hirabayashi, Hidenori Nagasaka, Manabu Sugimoto
Life of this patent
Estimating the term…
Abstract
An impact driver or impact tool includes a motor, a motor housing that houses the motor, a grip housing integrally provided with the motor housing, a hammer case is disposed frontward of the motor housing, a spindle rotated by the motor, a hammer housed inside the hammer case and configured to be rotated by the spindle, and an anvil housed inside the hammer case which anvil is configured to be impacted by the hammer. In this impact driver, a length from a rear end of the motor housing to a front end of the anvil (i.e., the front-rear length of a main body) is less than 128 mm.
Claims20
An impact tool, comprising:
- a motor;
- a motor housing for housing the motor;
- a grip housing integrally formed with the motor housing;
- a hammer case disposed frontward of the motor housing;
- a bearing configured to hold a rotary shaft of the motor;
- a bearing holding wall configured to hold the bearing and that is held by the hammer case;
- a first protruding part on the motor housing;
- a second protruding part on the bearing holding wall;
- a spindle operatively connected to the motor and configured to be rotated by the motor;
- a hammer housed inside the hammer case and configured to be rotated by the spindle;
- and
- an anvil housed inside the hammer case and configured to be impacted by the hammer;
- wherein a length from a rear end of the motor housing to a front end of the anvil is less than 128 mm;
- the second protruding part is disposed rearward of the first protruding part;
- and
- the second protruding part is a rear part of the bearing holding wall and is disposed on the outer side in the radial directions of the bearing.
An impact tool, including:
- a motor;
- a motor housing for housing the motor;
- a grip housing integrally formed with the motor housing;
- a hammer case disposed frontward of the motor housing;
- a spindle operatively connected to the motor and configured to be rotated by the motor;
- a hammer housed inside the hammer case and configured to be rotated by the spindle;
- an anvil housed inside the hammer case and configured to be impacted by the hammer;
- a bearing that holds the anvil and is disposed at a front part of the hammer case;
- a washer disposed between the anvil and the hammer case;
- and
- a projecting part extending from the hammer case to the anvil;
- and
- wherein the projecting part is disposed on an inner diameter side of the washer;
- and
- a length from a rear end of the motor housing to a front end of the anvil is less than 128 mm.
An impact tool, comprising:
- a motor;
- a motor housing enclosing the motor;
- a grip housing integrally formed with the motor housing;
- a hammer case extending from the motor housing;
- a spindle operatively connected to the motor and configured to be rotated by the motor;
- a hammer inside the hammer case and configured to be rotated by the spindle;
- and
- an anvil housed inside the hammer case and configured to be impacted by the hammer;
- wherein:
- the spindle includes a radial projection having an opening;
- a planetary gear is mounted on the radial projection by a pin having a first portion supporting the planetary gear and a second portion projecting into the opening, wherein a diameter of the second portion of the pin is less than a diameter of the first portion of the pin and wherein the first portion of the pin is too large to pass through the opening.
An impact tool, comprising:
- a motor;
- a motor housing enclosing the motor;
- a grip housing integrally formed with the motor housing;
- a hammer case extending from the motor housing;
- a spindle operatively connected to the motor and configured to be rotated by the motor;
- a hammer inside the hammer case and configured to be rotated by the spindle, the hammer being axially shiftable between first and second positions;
- an anvil housed inside the hammer case and configured to be impacted by the hammer;
- and
- a planetary gear mechanism including an internal gear and at least one planetary gear mounted to the spindle;
- wherein a portion of the hammer axially overlaps a portion of the internal gear when the hammer is in the first position.
Dependencies are inferred from the claim text.