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.
Claims13
A power tool, comprising:
- a brushless motor that includes (i) a stator including a cylindrically-shaped stator core and an insulator, (ii) a rotor that (a) includes a rotor core and permanent magnets and (b) is inside the stator, and (iii) a rotation shaft which is fixed to the rotor and that extends in a front-rear direction;
- an inner motor housing including an integrally molded cylinder portion, covering an outer periphery of the stator, and a bearing holder integrally molded to the cylinder portion;
- a rear housing including a loop-shaped handle housing and an outer motor housing (i) integrally formed with the handle housing and (ii) covering at least a part of an outer periphery of the inner motor housing;
- a front housing in front of the rear housing in the front-rear direction;
- a gear (i) in the interior of the front housing and (ii) configured to be driven by the rotation shaft;
- a cover on an outer periphery of the front housing;
- and
- a battery mounting portion on a lower portion of the rear housing.
A power tool, comprising:
- a brushless motor that includes (i) a stator including a cylindrically-shaped stator core and an insulator, (ii) a rotor that (a) includes a rotor core and permanent magnets and (b) is inside the stator, and (iii) a rotation shaft fixed to the rotor and that extends in a front-rear direction;
- an inner motor housing including an integrally molded cylinder portion that covers an outer periphery of the stator and a bearing holder coupled to the cylinder portion;
- a rear housing including a loop-shaped handle housing that comprises a handle upper portion, a handle lower portion, a handle front portion and a handle rear portion;
- an outer motor housing (i) integrally formed with the handle housing and (ii) covering at least a part of an outer periphery of the inner motor housing;
- a front housing in front of the rear housing;
- a gear (i) in the interior of the front housing and (ii) configured to be driven by the rotation shaft;
- a cover on an outer periphery of the front housing;
- and
- a switch on the handle rear portion;
- wherein:
- the handle front portion includes first air intake openings in a rear face of the handle front portion;
- the handle lower portion includes second air intake openings and the first and second air intake openings and the brushless motor are configured and arranged such that air passing through the first and second air intake openings flows into the brushless motor.
Dependencies are inferred from the claim text.