Work tool

Patent metadata

Field	Value
Publication number	US-10828765-B2
Application number	US-202016745861-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Mar 29, 2017
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

A work tool includes an an elongate outer housing, an elongate inner housing, a motor, a spindle, and a transmitting mechanism. The inner housing includes a first end part, a second end part, an extending part and an elastic connection part. The motor, the spindle and the transmitting mechanism are disposed in the first end part of the inner housing. The first end part is connected to the outer housing via a first elastic member. The second end part includes a power-source-related device configured to enable power supply from a power source to the motor. The elastic connection part includes second elastic members connecting the extending part and the second end part. The second elastic members are spaced apart from each other in a circumferential direction around the longitudinal direction.

First claim

What is claimed is:

1. A work tool configured to perform an operation on a workpiece by driving a tool accessory, the work tool comprising:
a motor having an output shaft, the output shaft being rotatable around a first axis;
a spindle having a tool mounting part and configured to reciprocally rotate within a prescribed angle range around a second axis by power of the motor and thereby oscillate the tool accessory mounted to the tool mounting part within an oscillation plane, the tool mounting part being configured such that the tool accessory is removably mounted thereto, the second axis being parallel to the first axis, the oscillation plane being orthogonal to the second axis; and
an elongate housing in which the motor and the spindle are housed, wherein:
when a longitudinal direction of the housing is defined as a front-rear direction, the housing includes:
a front housing part in which at least the spindle is housed; and
a rear housing part connected to a rear end portion of the front housing part and extending rearward,

the front housing part includes a first contact part, the first contact part having at least one first contact surface, the at least one first contact surface extending in a direction crossing the oscillation plane,
the rear housing part includes a second contact part, the second contact part having at least one second contact surface, the at least one second contact surface extending in the direction crossing the oscillation plane, and
the first and second contact parts are connected together in a state in which the at least one first contact surface and the at least one second contact surface are held in contact with each other.

2. The work tool as defined in claim 1 , wherein, when an extending direction of the first and second axes is defined as an up-down direction, and a direction orthogonal to the front-rear direction and the up-down direction is defined as a left-right direction, the at least one first contact surface and the at least one second contact surface are arranged to extend in a direction crossing the left-right direction.

3. The work tool as defined in claim 1 , wherein the motor is housed behind the spindle in the front housing part.

4. The work tool as defined in claim 3 , wherein the first contact part is disposed behind the motor.

5. The work tool as defined in claim 1 , wherein the front and rear housing parts respectively have first and second mating surfaces, the first and second mating surfaces being parallel to the oscillation plane.

6. The work tool as defined in claim 1 , wherein:
when an extending direction of the first and second axes is defined as an up-down direction, and a direction orthogonal to the front-rear direction and the up-down direction is defined as a left-right direction, the rear housing part includes left and right parts divided in the left-right direction,
the at least one first contact surface includes:
a left first contact surface provided on a left side of the first contact part; and
a right first contact surface provided on a right side of the first contact part,

the second contact part includes:
a left contact part provided in the left part; and
a right contact part provided in the right part,

the at least one second contact surface includes:
a left second contact surface provided on the left contact part; and
a right second contact surface provided on the right contact part, and

the first contact part and the second contact part are fixed with a screw in a state in which the first contact part is held between the left contact part and the right contact part, and the left first contact surface and the right first contact surface are respectively held in contact with the left second contact surface and the right second contact surface.

7. The work tool as defined in claim 1 , wherein the front housing part is made of metal and the rear housing part is made of resin.

8. The work tool as defined in claim 1 , wherein the first contact part is arranged along a virtual plane including the first axis and the second axis.

9. The work tool as defined in claim 1 , further comprising an outer housing that covers the housing, wherein the housing and the outer housing are connected via at least one elastic member.

10. The work tool as defined in claim 1 , wherein:
the front housing part includes:
a spindle housing part in which the spindle is housed; and
a motor housing part disposed behind the spindle housing part and housing the motor, and

the first contact part extends rearward from a rear end of the motor housing part.

11. The work tool as defined in claim 10 , wherein:
the rear housing part includes:
an extending part extending rearward from the motor housing part;
a rear part; and
an elastic connection part elastically connecting the extending part and the rear part.

12. The work tool as defined in claim 11 , wherein the second contact part includes at least one projection formed on an inner side of the extending part and protruding toward a virtual plane including the first axis and the second axis.

13. The work tool as defined in claim 12 , wherein:
the first contact part includes at least one through hole,
the at least one projection includes at least one large-diameter part and at least one small-diameter part, the at least one large-diameter part and the at least one small-diameter part being coaxially and contiguously formed with each other,
the at least one second contact surface is formed by at least one protruding end surface of the at least one large-diameter part, and
the first and second contact parts are connected together in a state in which the at least one small-diameter part is inserted into the at least one through hole.

14. The work tool as defined in claim 11 , wherein the rear part includes a power-source-related device configured to enable power supply from a power source to the motor.

Assignees

• Makita Corp

Inventors

• Aoki Yonosuke

Classifications

• B25F5/006 Primary

  Vibration damping means · CPC title

• B25F5/001

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• B25F3/00 Primary

  Associations of tools for different working operations with one portable power-drive means; Adapters therefor · CPC title

• B23D51/1615

  with shock absorbing means · CPC title

• F16H21/40

  for interconverting rotary motion and oscillating motion · CPC title