Rotary brush and robotic dust collector

Patent metadata

Field	Value
Publication number	US-2021093136-A1
Application number	US-202016998549-A
Country	US
Kind code	A1
Filing date	Aug 20, 2020
Priority date	Sep 30, 2019
Publication date	Apr 1, 2021
Grant date	—

Abstract

A rotary brush is easily attachable to and detachable from a body with less separation from the body during cleaning. A rotary brush attachable to a driving shaft rotatable about a rotation axis and including a protrusion includes a brush, a base to which the brush is attached, and a locking member that comes in contact with the base and the driving shaft to lock the base to the driving shaft.

First claim

What is claimed is:

1 . A rotary brush attachable to a driving shaft, the driving shaft being rotatable about a rotation axis and including a protrusion, the rotary brush comprising:
a brush; a base to which the brush is attached; and a locking member configured to come in contact with the base and the driving shaft to lock the base to the driving shaft.

2 . The rotary brush according to claim 1 , wherein
the base has a hole having an end from which the protrusion protrudes, and the locking member includes a fastener having an opening to allow the protrusion to pass through, and configured to come in contact with the protrusion while at least partially surrounding the protrusion.

3 . The rotary brush according to claim 2 , wherein
the fastener is elastically deformable.

4 . The rotary brush according to claim 2 , wherein
the base includes a guide orthogonal to the rotation axis, and the locking member includes
a slide portion guided by the guide, and
a cap supporting the fastener.

5 . The rotary brush according to claim 4 , wherein
the cap includes a positioning unit positioning the fastener.

6 . The rotary brush according to claim 5 , wherein
the fastener includes
a fastening portion configured to at least partially surround the driving shaft; and
a tab protruding from the fastening portion in an axial direction parallel to the rotation axis, and
the positioning unit has a recess into which the tab is fitted.

7 . The rotary brush according to claim 5 , wherein
the positioning unit includes a wall at least partially surrounding the fastener.

8 . The rotary brush according to claim 2 , wherein
the locking member includes a cap integral with the fastener.

9 . The rotary brush according to claim 4 , wherein
the cap covers the protrusion.

10 . The rotary brush according to claim 4 , wherein
the guide includes
a first guide groove extending in a guide direction, and
a second guide groove facing the first guide groove, and
the slide portion includes
a first slide tab received in the first guide groove, and
a second slide tab received in the second guide groove.

11 . The rotary brush according to claim 4 , wherein
the guide has
a guide surface surrounding the end of the hole, and
a guide rib on the guide surface, and
the slide portion has
a slide surface facing the guide surface, and
a slide groove at least partially receiving the guide rib.

12 . The rotary brush according to claim 11 , wherein
the guide rib partially surrounds the hole.

13 . The rotary brush according to claim 2 , wherein
the fastener is at least partially receivable in a groove on the protrusion.

14 . The rotary brush according to claim 1 , wherein
the locking member is movable between a lock position to be in contact with the driving shaft and an unlock position to be separate from the driving shaft.

15 . The rotary brush according to claim 14 , wherein
the base includes a disengagement reducing unit located to reduce disengagement from the locking member at the unlock position.

16 . The rotary brush according to claim 1 , wherein
the base has a first facing surface facing a first support surface surrounding the driving shaft and orthogonal to the rotation axis.

17 . The rotary brush according to claim 1 , wherein
the base has a second facing surface facing a second support surface surrounding the driving shaft and including a flat surface parallel to the rotation axis.

18 . The rotary brush according to claim 3 , wherein
the base includes a guide orthogonal to the rotation axis, and the locking member includes
a slide portion guided by the guide, and
a cap supporting the fastener.

19 . The rotary brush according to claim 6 , wherein
the positioning unit includes a wall at least partially surrounding the fastener.

20 . A robotic dust collector, comprising:
a housing including a bottom surface having a suction port; a brush motor accommodated in the housing; a driving shaft driven by the brush motor to rotate about a rotation axis; and the rotary brush according to claim 1 attached to the driving shaft.

Assignees

• Makita Corp

Inventors

• Koura Kentaro
• Sumiyoshi Hirotaka

Classifications

• A47L9/2884

  Details of arrangements of batteries or their installation · CPC title

• A47L9/0411

  driven by electric motor · CPC title

• A47L9/04

  with driven brushes or agitators · CPC title

• A47L9/00

  Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners · CPC title

• A47L9/0466 Primary

  Rotating tools · CPC title