Power tool

Patent metadata

Field	Value
Publication number	US-2018205293-A1
Application number	US-201815919712-A
Country	US
Kind code	A1
Filing date	Mar 13, 2018
Priority date	Mar 17, 2014
Publication date	Jul 19, 2018
Grant date	—

Abstract

A power tool includes a brushless motor having a stator and a rotor, which includes a rotary shaft extending in a front-rear direction of the power tool. The rotary shaft rotates a spindle that extends in an up-down direction of the power tool. A fan is fixedly coupled to the rotary shaft and rotates therewith. A switch is disposed rearward of the brushless motor and a controller is disposed rearward of the switch in the front-rear direction. A battery pack is disposed rearward of the controller. A main-body housing houses the brushless motor, the switch and the controller. The main-body housing includes a first tubular part, which houses the brushless motor, and a second tubular part, which houses the switch. The diameter of the second tubular part is smaller than the diameter of the first tubular part.

First claim

1 .- 20 . (canceled)

21 . A power tool comprising:
a tubular housing having a front-rear direction defined along a longitudinal direction of the tubular housing, a motor housed in the tubular housing, a switch disposed in the tubular housing and oriented such that a button of the switch faces forward in the front-rear direction, the button being movable in the front-rear direction, an operating member disposed on an exterior surface of the tubular housing and being slidable in the front-rear direction, a slide part slidably housed within the tubular housing, the slide part being operably coupled to the operating member so as to be slidable in the front-rear direction in conjunction with the operating member, and a pressing mechanism operably disposed between the slide part and the switch, the pressing mechanism being configured to turn ON the switch when the slide part is moved forward in the front-rear direction by the operating member and to turn OFF the switch when the slide part is moved rearward in the front-rear direction by the operating member.

22 . The power tool according to claim 21 , wherein one axial end side of the tubular housing faces forward.

23 . The power tool according to claim 21 , wherein:
the pressing mechanism comprises a lever pivotably supported inside the tubular housing, a first end portion of the lever is connected to the slide part, a second end portion of the lever is disposed forward of the button, and the lever pivots in accordance with sliding movement of the slide part such that the second end of the lever depresses the button when the slide part is moved forward.

24 . The power tool according to claim 21 , further comprising:
a pin supported by a support boss that protrudes from an inner surface of the tubular housing, wherein the pressing mechanism is pivotably supported on the tubular housing via the pin.

25 . The power tool according to claim 23 , further comprising:
a button member configured to integrally move forward and rearward in engagement with the second end portion of the lever, wherein the button member is disposed between the second end portion of the lever and the button, and the second end portion of the lever depresses the button via the button member when the lever pivots.

26 . A power tool, comprising:
a first tubular housing portion that houses a motor, a second tubular housing portion disposed rearward of the first tubular housing portion, the second tubular housing portion being narrower than the first tubular housing portion, and a switch disposed in the second tubular housing portion, wherein the switch includes: a button that faces forward and is movable in a front-rear direction of the first and second tubular housing portions and one or more wires extending from a rear side portion of the switch.

27 . The power tool according to claim 26 , further comprising:
an operating member disposed in a groove defined on an exterior surface of the first tubular housing portion and being slidable in a front-rear direction to turn the switch ON and OFF.

28 . The power tool according to claim 27 , further comprising:
a slide part slidably housed in the first tubular housing portions, the slide part being operably coupled to the operating member so as to be slidable in the front-rear direction in conjunction with the operating member, and a pressing mechanism operably disposed between the slide part and the switch, the pressing mechanism being configured to depress the button of the switch rearward when the slide part is moved forward by the operating member and to allow the button to move frontward when the slide part is moved rearward by the operating member.

29 . The power tool according to claim 28 , further comprising:
a spindle configured to be rotated by the rotary shaft of the motor and extending in an up-down direction of the power tool that is at least substantially perpendicular to the front-rear direction; wherein the switch is disposed rearward of the motor in the front-rear direction.

30 . The power tool according to claim 29 , wherein:
the operating member comprises a switch knob. the slide part comprises a slide plate operably coupled between the switch and the switch knob, the slide plate being slidably guided in a guide part provided on an inner surface of the main-body housing and extending in the front-rear direction.

31 . The power tool according to claim 30 , further comprising:
a retaining rib holding the switch and being disposed on the second tubular housing portion, wherein a space is defined in the second tubular housing portion downward of the retaining rib in the up-down direction, and a power-supply line or the signal line connected to the motor is wired through the space.

32 . The power tool according to claim 31 , further comprising a disk operably coupled to the spindle, wherein the power tool is a grinder.

33 . A power tool comprising:
a tubular housing having a front-rear direction defined along a longitudinal direction of the tubular housing, the tubular housing comprising a first tubular housing portion disposed frontward of a second tubular housing portion that is narrower than the first tubular housing portion, a motor disposed in the first tubular housing portion, a push button switch disposed in the second tubular housing portion and oriented such that a button of the push button switch faces forward in the front-rear direction, the button being movable in the front-rear direction, a switch knob disposed on an exterior surface of the first tubular housing portion and being slidable in the front-rear direction, a slider slidably housed within the first tubular housing portion, the slider having a first end portion coupled to the switch knob, and a lever pivotably supported within the tubular housing, wherein a first end portion of the lever is coupled to a second end portion of the slider, and a second end portion of the lever is configured to depress the button of the push button switch rearward when the slider is moved forward in the front-rear direction by the switch knob and to allow the button to move frontward when the slider is moved rearward in the front-rear direction by the switch knob.

34 . The power tool according to claim 33 , further comprising one or more wires extending from a rear side portion of the push button switch.

35 . The power tool according to claim 34 , further comprising:
a pin supported by a support boss that protrudes from an inner surface of the tubular housing, wherein the lever is pivotably supported on the tubular housing via the pin.

36 . The power tool according to claim 35 , further comprising:
a spindle configured to be rotated by the rotary shaft of the motor and extending in an up-down direction of the power tool that is at least substantially perpendicular to the front-rear direction; wherein the switch is disposed rearward of the motor in the front-rear direction.

37 . The power tool according to claim 36 , further comprising a disk operably coupled to the spindle, wherein the power tool is a grinder.

38 . The power tool according to claim 33 , further comprising:
a retaining rib holding the push button switch and being disposed on the second tubular housing portion, wherein a space is defined in the second tubular housing portion downward of the retaining rib in the up-down direction, and a power-supply line or the signal line connected to the motor is wired through the space.

39 . The power

Assignees

• Makita Corp

Inventors

• Kawakami Takahiro
• Nakahama Masatoshi

Classifications

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title

• B25F5/008

  Cooling means · CPC title

• B24B23/02

  with rotating grinding tools; Accessories therefor · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• H02K11/27

  Devices for sensing current, or actuated thereby (overcurrent protection responsive to temperature of the machines or parts thereof, e.g. windings, H02K11/25) · CPC title