Electric tool
AssigneeKoki Holdings Co., Ltd.
InventorsYuuki Takeda, Hironori Sakai
Life of this patent
Estimating the term…
Abstract
An electric tool includes a housing; a brushless motor, housed in the housing; an output shaft configured to hold a tip tool; a switching circuit controlling the brushless motor; a circuit board; a case, accommodating the circuit board, the case is filled with a resin, wherein the resin covers at least a part of the circuit board; the housing includes a motor housing element and a cover element covering at least a part of the case. The motor housing element includes a motor housing part accommodating the brushless motor, and a fixing part, configured to fix the case to the motor housing by the fixing part abutting the case.
Claims20
An electric tool comprising:
- a housing;
- a brushless motor, housed in the housing, the brushless motor having a rotary shaft extending in a front-rear direction;
- an output shaft, disposed at a front of the brushless motor, the output shaft configured to hold a tip tool;
- a switching circuit controlling the brushless motor;
- a circuit board, disposed at a rear of the brushless motor, the switching circuit is loaded to the circuit board;
- a case, accommodating the circuit board, the case is filled with a resin, wherein the resin covers at least a part of the circuit board;
- wherein the housing comprises:
- a motor housing element including:
- a motor housing part, formed in a substantially cylindrical shape, the motor housing part accommodating the brushless motor;
- a fixing part, configured to abut the case and to fix the case to the motor housing;
- a cover element that is a component different from the motor housing element, the cover element covering at least a part of the case which is fixed to the motor housing element.
An electric tool comprising:
- a brushless motor, having a rotary shaft extending in a front-rear direction;
- a housing comprising:
- a motor housing element, having an opening disposed at a front, the opening is configured for inserting the brushless motor;
- a cover element that is a component different from the motor housing element;
- an output shaft, disposed at a front of the brushless motor, the output shaft configured to hold a tip tool;
- a switching circuit controlling the brushless motor;
- a circuit board, disposed at a rear of the brushless motor, the switching circuit is loaded to the circuit board;
- wherein the motor housing element includes a motor housing part, accommodating the brushless motor,
- wherein, at an outside part of the motor housing, the circuit board is fixed to the motor housing element,
- wherein the cover element is connected to the motor housing part so as to cover the circuit board which is fixed to the motor housing element.
An electric tool comprising:
- a brushless motor, having a rotary shaft extending in a front-rear direction;
- a housing comprising:
- a motor housing element, having an opening disposed at a front, the opening is configured for inserting the brushless motor;
- a cover element that is a component different from the motor housing element;
- an output shaft, disposed at a front of the brushless motor, the output shaft configured to hold a tip tool;
- a switching circuit controlling the brushless motor;
- a circuit board, disposed at a rear of the brushless motor, the switching circuit is loaded to the circuit board;
- wherein the motor housing element includes a motor housing part, accommodating the brushless motor,
- wherein the motor housing element is provided with a cover portion at a rear of the motor housing part, the cover portion covers at least a part of the circuit board in a direction orthogonal to the front-rear direction,
- wherein the cover element is connected to the motor housing part so as to cover another part of the circuit board that is not covered by the cover portion.
Dependencies are inferred from the claim text.