Electric power tool
AssigneeMakita Corporation
InventorsDing Zhao, Daiki Imaida
Life of this patent
Estimating the term…
Abstract
An electric power tool includes: a grip extending in a front-rear direction; a motor housing disposed forward of the grip; a motor disposed inside the motor housing and including a stator and a rotor, the rotor being rotatable with respect to the stator; a bevel gear configured to rotate integrally with the rotor and including a shaft extending in the front-rear direction; a spindle directly or indirectly rotated via the bevel gear and extending in a direction intersecting the front-rear direction; a tool accessory holder rotated by the spindle; a case to accommodate the bevel gear and the spindle; and a bearing held by the case and configured to hold the bevel gear to be rotatable.
Claims17
An electric power tool comprising:
- a grip extending in a front-rear direction;
- a motor housing disposed forward of the grip;
- a motor disposed inside the motor housing and including a stator and a rotor, the rotor being rotatable with respect to the stator;
- a bevel gear configured to rotate integrally with the rotor and including a shaft extending in the front-rear direction;
- a spindle rotated by rotational force of the rotor transmitted via the bevel gear and extending in a direction intersecting the front-rear direction;
- a tool accessory holder rotated by the spindle;
- a case to accommodate the bevel gear and the spindle;
- and
- a bearing held by the case and configured to hold the bevel gear to be rotatable;
- wherein
- the case includes:
- a radial support surface to support a radial load acting on the bearing and a front support surface to support a forward thrust load acting on the bearing;
- the motor housing and the case are connected to each other in the front-rear direction;
- and
- the motor housing includes a rear support surface to support a rearward thrust load acting on the bearing.
An electric power tool comprising:
- a grip extending in a front-rear direction;
- a motor housing disposed forward of the grip;
- a motor disposed inside the motor housing and including a stator and a rotor, the rotor being rotatable with respect to the stator;
- a pinion gear configured to rotate integrally with the rotor;
- a speed reducing mechanism connected to the pinion gear;
- a spindle connected to the speed reducing mechanism and extending in a direction intersecting the front-rear direction;
- a tool accessory holder rotated by the spindle;
- a case to accommodate the pinion gear, the speed reducing mechanism, and the spindle;
- and
- a bearing held by the case and configured to hold the pinion gear to be rotatable;
- wherein
- the motor housing and the case are connected to each other in a front-rear direction;
- the bearing is clamped between the motor housing and the case;
- the case has an accommodating recess being recessed forward from a rear portion of the case and configured to accommodate the bearing;
- and
- the motor housing includes a support wall to support a rear surface of the bearing on a front surface of the motor housing.
An electric power tool comprising:
- a grip extending in a front-rear direction;
- a motor housing disposed forward of the grip;
- a motor disposed inside the motor housing and including a stator and a rotor, the rotor being rotatable with respect to the stator;
- a bevel gear rotated by the rotor and including a shaft extending in the front-rear direction;
- a spindle rotated by rotational force of the rotor transmitted via the bevel gear and extending in a direction intersecting the front-rear direction;
- a tool accessory holder rotated by the spindle;
- a case to accommodate the bevel gear and the spindle;
- a bearing held by the case and configured to hold the bevel gear to be rotatable;
- an intermediate support member having a front surface coming in contact with the bearing;
- and
- a fixing member coming in contact with a rear surface of the intermediate support member to fix the intermediate support member, together with the case, only by clamping.
Dependencies are inferred from the claim text.