Electric tool
AssigneeKoki Holdings Co., Ltd.
InventorsKen MIYAZAWA, Ryo Suzuki
Life of this patent
Estimating the term…
Abstract
An electric tool is provided, including: a cylindrical motor housing accommodating and supporting a motor; and a cooling fan attached to a rotation shaft of the motor, in which the motor is cooled by flowing air generated by the cooling fan from a back side toward a front side of the motor housing. A fan guide guiding cooling air is provided in front of an insulator of a stator of the motor. The fan guide includes a first cylindrical part covering a rotation space of the cooling fan, a guide surface, and a second cylindrical part extending backward from the guide surface. A labyrinth space is formed by the insulator and the second cylindrical part. By providing the labyrinth space, it is possible to block the flow of cooling air from an outer peripheral side of the stator to an opening.
Claims15
An electric tool, having:
- a motor, having a stator, a rotor located inside the stator, and a rotation shaft extending from one side to an other side;
- a motor housing of a cylindrical shape, accommodating and supporting the motor;
- a cooling fan, attached to the rotation shaft of the motor and rotating in synchronization with the motor;
- and
- a power transmission mechanism, transmitting a rotational force of the motor to a tip tool, wherein
- the motor is cooled by flowing an air generated by the cooling fan from an opening on one side of the motor housing toward an opening on the other side of the motor housing, wherein
- the stator has a nonmagnetic insulator at one side of the stator, and
- a fan guide is provided, guiding a cooling air generated by the cooling fan from an intake port to an exhaust port, and
- the fan guide has a first cylindrical part, a guide surface connected to the first cylindrical part, and a second cylindrical part connected to the guide surface, and guides the cooling air to concentrate inside the stator, and
- an end portion provided at one side of the second cylindrical part is located on one side than an opening surface provided on the other side of the insulator.
An electric tool, having:
- a motor;
- a power conversion mechanism, driving a tip tool by rotation of the motor;
- a fan, rotated by driving of the motor;
- a housing, having an intake port and an exhaust port and accommodating the motor and the fan;
- and
- a filter member, provided at the intake port, wherein
- the filter member is attachable and detachable in an opening direction of the intake port, and has a locking part extending in a direction intersecting the opening direction of the intake port, and
- the locking part suppresses falling-off of the filter member by engaging with the housing.
Dependencies are inferred from the claim text.