Reciprocating tool
AssigneeMakita Corporation
InventorsRyosuke HARA, Tomohiro UKAI
Life of this patent
Estimating the term…
Abstract
A reciprocating tool includes a motor, a reciprocating member, and a crank mechanism. The motor is disposed in a housing. The reciprocating member projects from the housing. The crank mechanism converts rotation of a rotation shaft of the motor into reciprocation of the reciprocating member. The crank mechanism rotates around an axis in a lateral direction by rotation transmission from the rotation shaft, and the crank mechanism includes a crank member having an eccentric pin, a connecting rod coupling the eccentric pin to the reciprocating member, and a balancer coupled to the eccentric pin, and the balancer is supported by the eccentric pin alone in the housing.
Claims8
A rechargeable reciprocating saw comprising:
- a brushless motor that includes a rotation shaft extending in a front-rear direction;
- a reciprocation converting mechanism that is driven by the rotation shaft;
- a slider that is reciprocally driven in the front-rear direction by the reciprocation converting mechanism;
- a tool holder connected to an end of the slider opposite from the reciprocation converting mechanism in the front-rear direction;
- a motor housing that houses the brushless motor;
- a handle housing that connects to the motor housing and forms a handle of the rechargeable reciprocating saw;
- a front housing that houses the reciprocation converting mechanism;
- a battery mounting portion disposed in a lower portion of the handle housing;
- a control circuit board (1) housed in the battery mounting portion and (2) that controls the brushless motor;
- and
- a fan on the rotation shaft that rotates with the rotation shaft;
- wherein:
- the battery mounting portion includes a battery mounting portion air intake opening;
- and
- the battery mounting portion air intake opening, the circuit board, the fan and brushless motor are located such that air suctioned through the battery mounting portion air intake opening by rotation of the fan sequentially cools the control circuit board and the brushless motor.
A rechargeable reciprocating saw comprising:
- a brushless motor that includes a rotation shaft extending in a front-rear direction;
- a fan rotated by the rotation shaft;
- a reciprocation converting mechanism that is driven by the rotation shaft;
- a slider that is reciprocally driven in the front-rear direction by the reciprocation converting mechanism;
- a tool holder connected to an end of to the slider opposite from the reciprocation converting mechanism in the front-rear direction;
- a motor housing that houses the brushless motor;
- a loop type handle housing that connects to the motor housing;
- a front housing that houses the reciprocation converting mechanism;
- a battery mounting portion disposed in a lower portion of the handle housing;
- and
- a control circuit board (1) housed in the battery mounting portion and (2) that controls the brushless motor;
- wherein:
- the handle housing includes a first air intake opening;
- the battery mounting portion includes a second air intake opening;
- and
- the first air take opening, the second air intake opening, the fan, the motor housing and the handle housing are located such that air suctioned through the first air intake opening and the second air intake opening by rotation of the fan is introduced to the motor housing through the handle housing.
Dependencies are inferred from the claim text.