Self-propelled, dust-collecting robot

Patent metadata

Field	Value
Publication number	US-11564545-B2
Application number	US-201916423339-A
Country	US
Kind code	B2
Filing date	May 28, 2019
Priority date	Oct 3, 2014
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A self-propelled, dust-collecting robot includes a main-body part including a dust collection box, and a first battery pack, which has a case, at least one battery cell in the case, a control circuit board having a controller mounted in the case, and a discharge terminal. The main body part includes a first battery pack mount having a connector to which the first battery pack is removably connectable. The first battery pack is configured for use in an electric power tool.

First claim

We claim:

1. A self-propelled, dust-collecting robot, comprising:
a main-body part including a bottom wall, a dust collection box, and a front wall portion spaced from a rear wall portion in a first direction;
a first battery pack having a case, at least one battery cell in the case, a control circuit board having a controller mounted in the case, and a discharge terminal;
a first drive wheel;
a second drive wheel spaced from the first drive wheel in a second direction perpendicular to the first direction, the first drive wheel and the second drive wheel being supported by the main-body part and being rotatable around a drive wheel axis of rotation;
a first castor and a second castor disposed between the drive wheel axis of rotation and the rear wall portion, each of the first and second castors respectively including a castor wheel rotatable about an axle axis of an axle and a support shaft attached to the housing and defining a pivot axis substantially perpendicular to the axle axis, each of the castor wheels being pivotable about the respective pivot axis; and
a dust-collecting opening extending through the bottom wall between the drive wheel axis of rotation and the front wall portion;
wherein:
the main body part includes a first battery pack mount having a connector to which the first battery pack is removably connectable,
the first battery pack is configured for use in an electric power tool,
the first drive wheel is bounded by a first plane perpendicular to the drive wheel axis of rotation,
the second drive wheel is bounded by a second plane perpendicular to the drive wheel axis of rotation,
the pivot axis of the first castor and the pivot axis of the second castor are located between the first plane and the second plane,
the first castor and the second castor are spaced from the dust-collecting opening in a direction opposite the first direction,
the first castor is spaced from the second castor in the second direction, and
the first battery pack does not overlie the drive wheel axis of rotation when the first and second drive wheels and the first and second castors support the robot on a support surface.

2. The self-propelled dust-collecting robot according to claim 1 , wherein:
the first battery pack mount includes a vertical wall,
the connector is located on the vertical wall and
the first battery pack is configured to connect to the connector via movement in a first vertical direction and to disconnect from the connector via a movement in second vertical direction opposite the first vertical direction.

3. The self-propelled dust-collecting robot according to claim 1 , wherein:
the main body part has a substantially cylindrical outer wall;
the first battery pack mount includes a first electrical terminal and a second electrical terminal separated by a gap, and
a radius of the cylindrical outer wall passes through the gap without intersecting the first or second electrical terminal.

4. The self-propelled dust-collecting robot according to claim 3 , wherein:
the first battery pack mount includes a first guide rail and a second guide rail, and
the radius of the cylindrical outer wall passes between the first and second guide rails without intersecting the first or second guide rails.

5. The self-propelled dust-collecting robot according to claim 4 , wherein the first and second electrical terminals are located between the first and second guide rails.

6. The self-propelled dust-collecting robot according to claim 5 , further including:
a second battery pack mount configured in a manner identical to the first battery pack mount and
a second battery pack connected to the second battery pack mount.

7. The self-propelled dust-collecting robot according to claim 6 , wherein the first and second battery packs are externally mounted on the main body part.

8. The self-propelled dust-collecting robot according to claim 6 ,
wherein the main body part has an interior;
wherein the dust-collecting robot further includes:
a vacuum unit having a dust-collection motor in the interior and connected to the dust-collecting opening and configured to draw dust into the dust-collecting opening; and
wherein at least a portion of the first castor is located directly beneath the first battery pack and at least a portion of the second castor is located directly beneath the second battery pack.

9. A self-propelled, dust-collecting robot, comprising:
a housing having an interior, a bottom wall, and a front wall portion spaced from a rear wall portion in a first direction;
a first drive wheel;
a second drive wheel spaced from the first drive wheel in a second direction perpendicular to the first direction, the first drive wheel and the second drive wheel being supported by the housing and being rotatable around a drive wheel axis of rotation;
a dust-collecting opening extending through the bottom wall between the drive wheel axis of rotation and the front wall portion;
a vacuum unit having a dust-collection motor in the interior connected to the dust-collecting opening and configured to draw dust into the dust-collecting opening;
a first castor and a second castor disposed between the drive wheel axis of rotation and the rear wall portion, each of the first and second castors respectively including a castor wheel rotatable about an axle axis of an axle and a support shaft attached to the housing and defining a pivot axis substantially perpendicular to the axle axis, each of the castor wheels being pivotable about the respective pivot axis;
a first power tool battery pack and a second power tool battery pack respectively mounted to the housing at locations between the drive wheel axis of rotation and the rear wall portion,
wherein:
at least a portion of the first castor is located directly beneath the first power tool battery pack and at least a portion of the second castor is located directly beneath the second power tool battery pack,
the first drive wheel is bounded by a first plane perpendicular to the drive wheel axis of rotation,
the second drive wheel is bounded by a second plane perpendicular to the drive wheel axis of rotation,
the pivot axis of the first castor and the pivot axis of the second castor are located between the first plane and the second plane,
the first castor and the second castor are spaced from the dust-collecting opening in a direction opposite the first direction,
the first castor is spaced from the second castor in the second direction, and
the first battery pack and the second battery pack do not overlie the drive wheel axis of rotation when the first and second drive wheels and the first and second castors support the robot on a support surface.

10. The self-propelled, dust-collecting robot according to claim 9 , wherein the first battery pack and the second battery pack are respectively mounted on first and second pairs of guide rails that extend on the housing in a third direction perpendicular to the first direction and to the second direction such that the first and second battery packs sandwich the dust-collection motor in the second direction and are removable from the guide rails in the third direction.

11. The self-propelled, dust-collecting robot according to claim 10 , wherein:
the first battery pack includes a first side and a second side opposite the first side,
the first side of the first battery pack includes an electrical connector in contact with an electrical connector of the first battery pack mount and
the second side of the first battery pack is radially spaced from the first side of the first battery pack and is located at a periphery of the main body part.

12. The self-propelled

Assignees

• Makita Corp

Inventors

• Koura Kentaro
• Shinma Yasutoshi

Classifications

• A47L9/2868

  Arrangements for power supply of vacuum cleaners or the accessories thereof · CPC title

• A47L2201/00

  Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation · CPC title

• A47L9/2884 Primary

  Details of arrangements of batteries or their installation · CPC title

• A47L9/1418

  Impermeable dust collecting bags · CPC title