Power tool

Patent metadata

Field	Value
Publication number	US-12290867-B2
Application number	US-202318101245-A
Country	US
Kind code	B2
Filing date	Jan 25, 2023
Priority date	Nov 28, 2019
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A power tool includes a spindle, a motor, an inner housing and an outer housing elastically connected to the inner housing. The inner housing is formed by a first inner housing portion formed of metal connected to a second inner housing portion formed of synthetic polymer. The first inner housing portion includes a housing part disposed in a front part of the outer housing, and a first extending part extending rearward from the housing part and disposed in a grip part of the outer housing. The second inner housing portion includes a second extending part that has a tubular shape and at least partially surrounds the first extending part, and a rear end part connected to the second extending part and disposed in a rear part of the outer housing. The first extending part extends rearward of a center of the second extending part in the front-rear direction.

First claim

What is claimed is:

1. A power tool configured to drive a tool accessory in an oscillating manner, the power tool comprising:
an outer housing that is a hollow body having a longitudinal axis that defines a front-rear direction of the power tool, the outer housing including a front part, a rear part and a grip part, the grip part connecting the front part and the rear part and being configured to be held by a user;
an inner housing extending in the front-rear direction within the outer housing and elastically connected to the outer housing, the inner housing including a front part disposed within the front part of the outer housing, a rear part disposed within the rear part of the outer housing and an extending part extending rearward from the front part of the inner housing within the grip part of the outer housing;
a spindle housed in the front part of the inner housing and configured to be driven in rotary oscillating motion within a specified angle range around a first axis that defines an up-down direction of the power tool, the spindle having a lower end portion configured to removably receive the tool accessory;
a control device housed in the rear part of the inner housing and configured to control operation of the power tool;
a holder disposed in and directly connected to the extending part of the inner housing and holding an electric wire that extends from the control device; and
a weight held on the extending part of the inner housing and directly engaging the holder,
wherein:
the holder is located between the extending part and the weight in the up-down direction,
the weight increases the moment of inertia of the inner housing with respect to the first axis;
the holder includes a protrusion that extends upward from an upper surface of the holder in the up-down direction at a location that is in-between front and rear ends of the holder in the front-rear direction, and
the weight has a projection that engages in the protrusion of the holder.

2. The power tool as defined in claim 1 , wherein the holder is formed separately from the inner housing and is housed within the extending part.

3. The power tool as defined in claim 1 , wherein:
the holder has a passage extending through the holder in the front-rear direction, and
the holder is formed by a body and a cover being connected to each other.

4. The power tool as defined in claim 3 , wherein:
the holder is located below the weight in the up-down direction, and
the protrusion is located on the cover of the holder.

5. The power tool as defined in claim 1 , wherein:
the inner housing is formed by a first inner housing portion connected to a second inner housing portion,
the first inner housing portion includes:
a housing part that houses at least the spindle and that forms at least a portion of the front part of the inner housing; and
a first extending part that extends rearward from the housing part and that forms a portion of the extending part,

the second inner housing portion includes a second extending part that forms a portion of the extending part,
a direction that is orthogonal to the up-down direction and to the front-rear direction is defined as a left-right direction of the power tool,
the second inner housing portion is formed by a left member and a right member being connected together in the left-right direction, and
the first extending part is held between the left member and the right member.

6. The power tool as defined in claim 5 , wherein the first inner housing portion and the holder are configured to be partially engaged with each other.

7. The power tool as defined in claim 6 , wherein:
the second extending part has a tubular shape,
the holder is formed as an elongate tubular body that extends in the front-rear direction above the first extending part of the first inner housing portion within the second extending part.

8. The power tool as defined in claim 7 , wherein:
the holder is located below the weight in the up-down direction, and
the protrusion is located on the cover of the holder.

9. The power tool as defined in claim 8 , wherein the weight is held between the left member and the right member.

10. The power tool as defined in claim 9 , wherein:
the first inner housing portion is formed of metal, and
the left member and the right member of the second inner housing portion are formed of synthetic resin.

11. The power tool as defined in claim 9 , wherein the weight is held between the left member and the right member.

12. The power tool as defined in claim 9 , wherein the first inner housing portion is formed of metal.

13. The power tool as defined in claim 12 , wherein the left member and the right member of the second inner housing portion are formed of synthetic resin.

14. The power tool as defined in claim 1 , wherein the protrusion is located on a cover of the holder.

15. The power tool as defined in claim 14 , wherein:
the holder has a passage extending through the holder in the front-rear direction, and
the protrusion of the holder is disposed entirely outside of the passage.

16. The power tool as defined in claim 15 , wherein the holder includes a projection piece that projects from a side surface of the holder and directly engages the extending part.

17. The power tool as defined in claim 1 , wherein the holder is fitted in a recess defined in lower surface of the extending part and extending in the up-down direction.

18. A power tool configured to drive a tool accessory in an oscillating manner, the power tool comprising:
an outer housing that is a hollow body having a longitudinal axis that defines a front-rear direction of the power tool, the outer housing including a front part, a rear part and a grip part, the grip part connecting the front part and the rear part and being configured to be held by a user;
an inner housing extending in the front-rear direction within the outer housing and elastically connected to the outer housing, the inner housing including a front part disposed within the front part of the outer housing, a rear part disposed within the rear part of the outer housing and an extending part extending rearward from the front part of the inner housing within the grip part of the outer housing;
a spindle housed in the front part of the inner housing and configured to be driven in rotary oscillating motion within a specified angle range around a first axis that defines an up-down direction of the power tool, the spindle having a lower end portion configured to removably receive the tool accessory;
a control device housed in the rear part of the inner housing and configured to control operation of the power tool;
a holder disposed in the extending part of the inner housing and holding an electric wire that extends from the control device; and
a weight provided at the extending part of the inner housing;
wherein:
the holder is located below the weight,
the holder has a passage extending through the holder in the front-rear direction,
the holder comprises a cover connected to a body,
the body of the holder has an elongate channel shape that extends in the front-rear direction along the extending part,
the body of the holder includes (i) a peripheral wall that defines the passage, and (ii) an opening that is provided in the peripheral wall and that extends over an entire length of the body,
the cover is connected to the body to cover the opening,
the extending part is integral with the front part of the inner housing such that there are no seams between the extending part and the fro

Assignees

• Makita Corp

Inventors

• Aoki Yonosuke

Classifications

• B24B23/04 Primary

  with oscillating grinding tools; Accessories therefor · CPC title

• B26D2001/006

  the cutting blade having a special shape, e.g. a special outline, serrations · CPC title

• B26D2001/004

  not rotating · CPC title

• B25F5/006

  Vibration damping means · CPC title

• B27B19/006

  with oscillating saw blades; Hand saws with oscillating saw blades · CPC title