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.
Claims11
A power tool, comprising:
- a stator that includes a stator core, an insulator which engages the stator core, and a coil wound around the insulator;
- a rotor that is rotatable relative to the stator and includes a rotation shaft, a rotor core around the rotation shaft, and a permanent magnet fixed to the rotor core;
- an integrally molded main body cylinder outside the stator and having a front portion that is open;
- a bearing holder that is integral with a rear portion of the main body cylinder;
- a first anchor piece that (i) is integral with an upper portion of the main body cylinder and (ii) has a first through hole that extends in a right/left direction;
- a second anchor piece that (i) is integral with a lower portion of the main body cylinder and (ii) has a second through hole that extends in the right/left direction;
- a front housing that houses a gear configured to be driven by the rotor;
- a rear housing that has a first half housing on a right side of the main body cylinder and a second half housing on a left side of the main body cylinder;
- a first screw that extends in the right/left direction and assembles the first half housing and the second half housing via the first through hole;
- and
- a second screw that extends in the right/left direction and assembles the first half housing and the second half housing via the second through hole.
A power tool, comprising:
- a stator that includes a stator core, an insulator which engages the stator core, and a coil wound around the insulator;
- a rotor that is rotatable relative to the stator and includes a rotation shaft, a rotor core around the rotation shaft, and a permanent magnet fixed to the rotor core;
- an integrally molded main body cylinder outside the stator and having a front portion that is open;
- a bearing holder that is integral with a rear portion of the main body cylinder;
- a right handle front portion on a right side of the main body cylinder;
- a right handle upper portion coupled to the right handle front portion;
- a right handle lower portion that is (i) coupled to the right handle front portion and (ii) below the right handle upper portion;
- a right handle rear portion coupled to the right handle upper portion and the right handle lower portion;
- a left handle front portion on a left side of the main body cylinder;
- a left handle upper portion coupled to the left handle front portion;
- a left handle lower portion that is (i) coupled to the left handle front portion and (ii) below the left handle upper portion;
- a left handle rear portion coupled to the left handle upper portion and the left handle lower portion;
- a control circuit board inside the right handle lower portion and the left handle lower portion;
- a front housing that houses a gear configured to be driven by the rotor;
- and
- four screws that fix the main body cylinder to the front housing.
Dependencies are inferred from the claim text.