Vacuum cleaner

Patent metadata

Field	Value
Publication number	US-2021161338-A1
Application number	US-202016984508-A
Country	US
Kind code	A1
Filing date	Aug 4, 2020
Priority date	Dec 3, 2019
Publication date	Jun 3, 2021
Grant date	—

Abstract

A vacuum cleaner includes a suction nozzle including a housing that defines an inlet, a first shaft disposed at a side of the housing, a driver configured to rotate the first shaft, a rotating brush that extends along an axis and is configured to, based on rotation of the first shaft, rotate about the axis to thereby move dust on a surface to toward the inlet, a detachable cover configured to rotatably support a first end of the rotating brush, and a second shaft disposed at a second end of the rotating brush and configured to engage with the first shaft to rotate the rotating brush. The first shaft and the second shaft are configured to contact each other and to define first contact surfaces that have a spiral shape about the axis and that are configured to transfer rotational force from the first shaft to the second shaft.

First claim

What is claimed is:

1 . A vacuum cleaner comprising:
a main body configured to generate a differential air pressure with respect to an outside of the vacuum cleaner; and a suction nozzle configured to suction dust from the outside based on the differential air pressure, the suction nozzle comprising:
a housing that defines an inlet configured to receive the dust,
a first shaft disposed at a side of the housing,
a driver disposed at the housing and configured to rotate the first shaft,
a rotating brush that extends along an axis and is configured to, based on rotation of the first shaft, rotate about the axis to thereby move the dust on a surface to toward the inlet,
a detachable cover configured to rotatably support a first end of the rotating brush, and
a second shaft disposed at a second end of the rotating brush and configured to engage with the first shaft to rotate the rotating brush,
wherein the first shaft and the second shaft are configured to come into contact with each other and to define a plurality of first contact surfaces having a spiral shape about the axis of the rotating brush, the first contact surfaces being configured to transfer a rotational force from the first shaft to the second shaft.

2 . The vacuum cleaner of claim 1 , wherein the first shaft and the second shaft are configured to further define a plurality of second contact surfaces, the second contact surfaces extending in parallel to the axis of the rotating brush and being configured to transfer a rotational inertia of the rotating brush to the first shaft.

3 . The vacuum cleaner of claim 1 , wherein the first contact surfaces are axisymmetric with respect to the axis of the rotating brush.

4 . The vacuum cleaner of claim 3 , wherein the first contact surfaces are curved along a rotational direction of the first shaft and extend in a direction from the second end of the rotating brush toward the first end of the rotating brush.

5 . The vacuum cleaner of claim 4 , wherein the first shaft and the second shaft are configured to contact each other at the first contact surfaces and slide with respect to each other, and
wherein the first shaft is configured to push the second shaft in an axial direction of the rotating brush through the first contact surfaces.

6 . The vacuum cleaner of claim 5 , wherein the first shaft and the second shaft are configured to further define a plurality of second contact surfaces, the second contact surface extending in parallel to the axis of the rotating brush and being configured to transfer a rotational inertia of the rotating brush to the first shaft, and
wherein the first shaft and the second shaft are configured to, based on the first shaft pushing the second shaft in the axial direction of the rotating brush, be separated from the second contact surfaces.

7 . The vacuum cleaner of claim 1 , wherein the first contact surfaces extend toward the axis of the rotating brush as the first shaft extends in a direction from the second end of the rotating brush toward the first end of the rotating brush.

8 . The vacuum cleaner of claim 1 , wherein a surface area of the first contact surfaces decreases as the first shaft extends in a direction from the second end of the rotating brush toward the first end of the rotating brush.

9 . The vacuum cleaner of claim 2 , wherein the second contact surfaces are axisymmetric with respect to the axis of the rotating brush.

10 . The vacuum cleaner of claim 1 , wherein the first shaft comprises a plurality of first transfer portions configured to insert into the second end of the rotating brush, and
wherein the second shaft comprises a plurality of second transfer portions that are configured to come into contact with the first transfer portions to thereby define the plurality of first contact surfaces.

11 . The vacuum cleaner of claim 1 , wherein the housing defines a side hole configured to receive the first shaft.

12 . The vacuum cleaner of claim 11 , wherein the second shaft is disposed in a through-hole of the rotating brush and defines an aperture that is configured to receive the first shaft passing through the side hole of the housing.

13 . The vacuum cleaner of claim 1 , further comprising a third shaft inserted into the first end of the rotating brush,
wherein the detachable cover is configured to cover the third shaft.

14 . A vacuum cleaner comprising:
a main body configured to generate a differential air pressure with respect to an outside of the vacuum cleaner; and a suction nozzle configured to suction dust from the outside based on the differential air pressure, the suction nozzle comprising:
a housing that defines an inlet configured to receive the dust,
a first shaft disposed at a side of the housing, the first shaft comprising a plurality of first surfaces,
a driver disposed at the housing and configured to rotate the first shaft,
a rotating brush that extends along an axis and is configured to, based on rotation of the first shaft, rotate about the axis to thereby move the dust on a surface toward the inlet,
a detachable cover configured to rotatably support a first end of the rotating brush, and
a second shaft disposed at a second end of the rotating brush and configured to engage with the first shaft to rotate the rotating brush, the second shaft comprising a plurality of second surfaces configured to come into contact with the first surfaces to thereby define a plurality of first contact surfaces,
wherein the plurality of first contact surfaces have a spiral shape about the axis of the rotating brush and are configured to transfer a rotational force from the first shaft to the second shaft.

15 . The vacuum cleaner of claim 14 , wherein the first shaft further comprises a plurality of third surfaces, and
wherein the second shaft further comprises a plurality of fourth surfaces that are configured to come into contact with the third surfaces to thereby define a plurality of second contact surfaces, the second contact surfaces extending in parallel to the axis of the rotating brush and being configured to transfer a rotational inertia of the rotating brush to the first shaft.

16 . The vacuum cleaner of claim 15 , wherein the first contact surfaces are curved along a rotational direction of the first shaft and extend in a direction from the second end of the rotating brush to the first end of the rotating brush,
wherein one of the first surfaces and one of the second surfaces are configured to slide with respect to each other based on the rotational force being applied from the first shaft to the second shaft, and wherein the first shaft is configured to push the second shaft in an axial direction of the rotating brush.

17 . The vacuum cleaner of claim 14 , wherein the first shaft further comprises a plurality of third surfaces,
wherein the second shaft further comprises a plurality of fourth surfaces that are configured to come into contact with the third surfaces to thereby define a plurality of second contact surfaces, the second contact surfaces extending in parallel to the axis of the rotating brush and being configured to transfer a rotational inertia of the rotating brush to the first shaft, and wherein one of the third surfaces and one of the fourth surfaces are configured to, based on the first shaft pushing the second shaft in an axial direction of the rotating brush, be spaced apart from each other.

18 . The vacuum cleaner of claim 14 , wherein the first shaft comprises a plurality of first transfer portions that define

Assignees

• Lg Electronics Inc

Inventors

• Hwang Phil Jae
• Ryu Chung Jae
• Kim Chiwan
• Lee Gyoungmin
• Park Yun Bo

Classifications

• A47L5/26

  with driven dust-loosening tools · CPC title

• A47L9/0477 Primary

  Rolls · CPC title

• A46B13/006

  formed by winding a strip tuft in a helix about the body · CPC title

• A47L9/0411 Primary

  driven by electric motor · CPC title

• A47L9/242

  Hose or pipe couplings · CPC title