Power tool and rotary impact tool

Patent metadata

Field	Value
Publication number	US-10040178-B2
Application number	US-201514698186-A
Country	US
Kind code	B2
Filing date	Apr 28, 2015
Priority date	May 27, 2014
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

To provide a power tool and a rotary impact tool capable of suppressing transmission of vibration to a circuit board and so on from a drive portion connecting to a motor as a vibration generation source. An impact wrench includes a motor housing which houses a motor or a grip housing, a battery holding housing connecting to the motor housing or the grip housing through an elastic body and a control circuit board housed in the battery holding housing for controlling the motor.

First claim

What is claimed is:

1. A power tool comprising:
a first housing which houses a motor;
a second housing connecting to the first housing through an elastic body disposed on an outer side of the first housing and on an inner side of the second housing, the elastic body configured to have a shock absorbing effect;
a control circuit board housed in the second housing and configured to control the motor;
a battery holding housing formed in the second housing; and
a battery attached to the battery holding housing.

2. The power tool according to claim 1 ,
wherein a grip housing is formed in the first housing,
the first housing comprises a first half and a second half,
a first screw is configured to fix the first haft of the first housing to the second half of the first housing,
the second housing comprises a first half and a second half, and
a second screw is configured to fix the first half of the second housing to the second half of the second housing.

3. The power tool according to claim 2 ,
wherein a display portion displaying the state of the power tool is formed in the battery holding housing.

4. The power tool according to claim 3 ,
wherein the control circuit board has a capacitor, and
the capacitor is arranged in a center area in a right and left direction of the control circuit board.

5. The power tool according to claim 3 , further comprising:
an impact mechanism configured to impact an output portion of the power tool.

6. The power tool according to claim 2 ,
wherein the control circuit board is held through a case made of a resin.

7. The power tool according to claim 2 ,
wherein the control circuit board has a capacitor, and
the capacitor is arranged in a center area in a right and left direction of the control circuit board.

8. The power tool according to claim 2 , further comprising:
an impact mechanism configured to impact an output portion of the power tool.

9. The power tool according to claim 2 , wherein
a trigger for energizing the motor is held by the grip housing.

10. The power tool according to claim 2 , wherein
the elastic body has a ring shape.

11. The power tool according to claim 1 ,
wherein the control circuit board is held through a case made of a resin.

12. The power tool according to claim 1 ,
wherein the control circuit board has a capacitor, and
the capacitor is arranged in a center area in a right and left direction of the control circuit board.

13. The power tool according to claim 1 , further comprising:
an impact mechanism configured to impact an output portion of the power tool.

Assignees

• Makita Corp

Inventors

• Kondo Tomoyuki
• Hirabayashi Tokuo

Classifications

• B25F5/006

  Vibration damping means · CPC title

• B25B21/02 Primary

  with means for imparting impact to screwdriver blade or nut socket · CPC title

• B25F5/001

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

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title