Power tool

Patent metadata

Field	Value
Publication number	US-11148272-B2
Application number	US-201916558439-A
Country	US
Kind code	B2
Filing date	Sep 3, 2019
Priority date	Feb 1, 2013
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A power tool ( 100 ) comprises a motor ( 110 ) operably driving a tool bit ( 119 ), a tool body ( 101 ) housing the motor ( 110 ), a handle ( 109 ) coupled to the tool body ( 101 ), and at least two battery mount parts ( 160 A, 160 B) defined on the handle ( 109 ) and/or the tool body ( 101 ). Each of the battery mount parts ( 160 A, 160 B) comprises a battery engaging part ( 161 ) configured to detachably engage with battery packs ( 170 A, 170 B) by sliding the battery packs ( 170 A, 170 B) relative to the battery engaging part ( 161 ) in a direction perpendicular to the longitudinal direction of the tool bit ( 119 ).

First claim

The invention claimed is:

1. A power tool, comprising:
a tool body,
a motor disposed in the tool body,
a tool bit movably supported by the tool body and being drivable along a driving axis using power supplied by the motor,
a handle having a first end connected to the tool body and a second end opposite of the first end along a handle-extending direction that intersects the first and second ends and is perpendicular to the driving axis of the tool bit, and
first and second battery mount parts integrally connected to a second end of the handle and to the tool body,
wherein:
each of the first and second battery mount parts is configured to respectively slidably receive and retain first and second battery packs,
each of the first and second battery mount parts comprises (i) a pair of spaced-apart, parallel guide rails that extend perpendicular to the driving axis such that a surface extending between the guide rails is substantially perpendicular to the handle-extending direction, and (ii) at least one battery connection terminal configured to be directly electrically connected to the first or the second battery pack;
the first and second battery packs and the first and second battery mount parts are configured such that: (a) the first and second battery packs are respectively slid into engagement with the first and second battery mount parts in a direction perpendicular to both of the driving axis and the handle-extending direction and (b) the first and second battery packs, when respectively retained by the first and second battery mount parts, are aligned side-by-side in a direction parallel to the driving axis and transverse to the handle-extending direction;
a grip portion is defined on the handle between the first and second ends of the handle along the handle-extending direction and is configured to be held by a user by inserting four fingers of the user through a through opening formed between the handle and the tool body;
a first line extends perpendicular to the driving axis and intersects the grip portion and the first battery pack mount,
a second line extends parallel to the first line and intersects the through opening and the second battery pack mount,
a third line extends parallel to the driving axis and intersects the first and second battery pack mounts and the motor, and
the second battery pack mount is disposed between the first battery pack mount part and the motor along the third line.

2. The power tool according to claim 1 , wherein the first and second battery mount parts are arranged on a side opposite to the tool bit with respect to the motor along the driving axis.

3. The power tool according to claim 1 , wherein the first and second battery mount parts and the first and second battery packs are configured such that the first and second battery packs have a length, when respectively mounted on the first and second battery mount parts along the driving axis that is shorter than a length of the first and second battery packs in the direction perpendicular to both of the driving axis and the handle-extending direction.

4. The power tool according to claim 1 , wherein each of the first and second battery mount parts comprises an elastic member which protrudes perpendicular to the driving axis and contacts the respective battery pack when the first and second battery packs are respectively mounted on the first and second battery mount parts.

5. The power tool according to claim 1 , wherein the first and second battery mount parts are provided on the tool body at one side with respect to the handle-extending direction.

6. The power hammer tool according to claim 1 , wherein the motor is arranged such that the driving axis intersects a rotational axis of a rotary shaft of the motor.

7. A hammer drill comprising:
a housing having first and second battery mount parts integrally formed on a surface of the housing,
a motor disposed within the housing and operatively driving a tool bit having a longitudinal axis,
a handle having a first end coupled to a first portion of the housing and a second end coupled to a second portion of the housing such that a through opening is defined between the housing and the handle, the through opening being sized to receive a user's fingers,
wherein:
a first direction is parallel to the longitudinal axis of the tool bit, a second direction is perpendicular to the first direction and a third direction is perpendicular to both the first and second directions,
the first battery mount part is spaced apart from the first end of the handle in the second direction,
the first battery mount part comprises a first pair of guide rails and a first battery contact terminal that extend in parallel to the third direction and the second battery mount part comprises a second pair of guide rails and a second battery contact terminal that also extend in parallel to the third direction,
the first and second pairs of guide rails and the first and second battery contact terminals are respectively configured to physically mount and electrically connect to first and second battery packs by sliding in the third direction,
a first line extending in the second direction intersects the handle and the first battery mount,
a second line in parallel to the first line intersects the through opening and the second battery pack, and
a third line extending in the first direction intersects the first pair of guide rails, the second pair of guide rails and the motor, the second pair of guide rails being disposed between the first pair of guide rails and the motor in the first direction.

8. The hammer drill according to claim 7 , further comprising a trigger switch configured to start and stop the motor, the trigger switch being disposed on the handle facing the through opening.

9. The hammer drill according to claim 7 , wherein:
the motor comprises a rotary shaft that rotates about a rotational axis, and
the third line intersects the rotary shaft.

10. The hammer drill according to claim 9 , further comprising a gear transmission operably coupling the rotary shaft to the tool bit,
wherein:
the gear transmission is disposed in the housing, and
a fourth line parallel to the first and second lines intersects the gear transmission and the motor.

11. The hammer drill according to claim 10 , further comprising:
a trigger switch configured to start and stop the motor, the trigger switch being disposed on the handle facing the through opening; and
the first and second battery packs respectively mounted on the first and second pairs of guide rails,
wherein the first and second battery packs respectively have first and second flat surfaces on an opposite side of the battery packs that connects to the first and second pairs of guide rails,
the first and second flat surfaces are coplanar and are both parallel to the first direction and the third direction when the first and second battery packs respectively mounted on the first and second pairs of guide rails, and
the first and second battery packs are longer in the third direction than in the first direction.

12. The hammer drill according to claim 11 , further comprising first and second elastic members respectively protruding in the second direction from the first and second battery pack mounts and respectively elastically contacting the first and second battery packs.

13. The hammer drill according to claim 12 , wherein the tool bit and the first portion of the handle are at opposite ends of the hammer drill in the first direction.

14. The hammer drill according to claim 13 , wherein the longitudinal axis of the tool bit intersects the through op

Assignees

• Makita Corp

Inventors

• Yoshikane Kiyonobu
• Takeuchi Hajime
• Tada Yoshiro
• Furusawa Masanori
• Miwa Masao
• Onoda Shinji
• Machida Yoshitaka

Classifications

• B25F5/02

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

• B25D16/00 Primary

  Portable percussive machines with superimposed rotation {, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit (combined percussion and rotary drilling adapted for earth drilling E21B6/00)} · CPC title