US20060032013A1 - Brush assembly of cleaner - Google Patents
Brush assembly of cleaner Download PDFInfo
- Publication number
- US20060032013A1 US20060032013A1 US11/034,773 US3477305A US2006032013A1 US 20060032013 A1 US20060032013 A1 US 20060032013A1 US 3477305 A US3477305 A US 3477305A US 2006032013 A1 US2006032013 A1 US 2006032013A1
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- US
- United States
- Prior art keywords
- brush
- magnet
- driving motor
- force
- rotary shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- 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
- A47L9/0009—Storing devices ; Supports, stands or holders
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/02—Floor surfacing or polishing machines
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- 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
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0411—Driving means for the brushes or agitators driven by electric motor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- 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
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2201/00—Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
Definitions
- the present invention relates to a brush assembly of a cleaner, and particularly, to a brush assembly of a cleaner capable of preventing motor damage by keeping the motor rotating when a brush cannot be rotated by being caught by a stuff or the like.
- a robot cleaner performs a cleaning operation while moving for itself without manipulation of a user, moves to a charging station if power of a battery is consumed during cleaning, and moves back to a cleaning zone to perform a cleaning operation when the battery charge is completed.
- a brush assembly for sweeping up dirt or foreign substances from a floor is installed at a suction opening through which dirt is sucked, of the robot cleaner.
- FIG. 1 is a side view showing a brush assembly of a robot cleaner in accordance with the conventional art.
- the brush assembly in accordance with the conventional art includes a driving motor 102 for generating a rotary force; a brush 106 rotatably installed at a suction opening of the robot cleaner, for sweeping up dirt and foreign substances from a floor; and a driving force transfer device 120 for transferring a rotary force of the driving motor 102 to the brush 106 .
- the driving force transfer device 120 includes a driving pulley 108 mounted at a rotary shaft 104 of the driving motor 102 ; a driven pulley 110 mounted at a rotary shaft 116 of the brush 106 ; and a belt 112 wound between the driving pulley 108 an the driven pulley 110 to transfer a driving force.
- the driving force transfer device includes a driving gear mounted at the rotary shaft of the driving motor; and a driven gear mounted at the rotary shaft of the brush, and transfers a driving force as the driving gear and the driven gear are engaged with each other.
- the brush driving force transfer device in accordance with the conventional art mechanically transfers a rotary force of the driving motor to the brush, a motor overload occurs as the brush cannot be rotated by being caught by a stuff or the like, causing motor damage.
- an object of the present invention is to provide a brush assembly of a cleaner capable of preventing motor damage by normally rotating a driving motor when a brush cannot be rotated by being caught by a stuff or the like.
- a brush assembly of a cleaner comprising: a driving motor mounted at a cleaner main body, for generating a rotary force; a brush rotatably disposed at a suction opening formed at the cleaner main body; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor.
- the driving force transfer device comprises: a first magnet mounted at a rotary shaft of the driving motor; and a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.
- the attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.
- the driving force transfer device comprises: a magnetic body mounted at a rotary shaft of the motor; and a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.
- the driving force transfer device comprises: a magnet mounted at a rotary shaft of the driving motor; and a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.
- a brush assembly of a robot cleaner provided with a suction opening at the center of a bottom of a cleaner main body, performing a cleaning operation while moving for itself, and automatically charging a battery, comprising: a driving motor mounted at the cleaner main body, for generating a rotary force; a brush rotatably disposed at the suction opening; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring the rotary force of the driving motor to the brush, and preventing transfer of a load generated at the brush to the motor.
- FIG. 1 is a side view showing a brush assembly of a cleaner in accordance with the conventional art
- FIG. 2 is a front view of a cleaner in accordance with one embodiment of the present invention.
- FIG. 3 is a rear view of the cleaner in accordance with one embodiment of the present invention.
- FIG. 4 is a sectional view of the cleaner in accordance with one embodiment of the present invention.
- FIG. 5 is a perspective view of a brush assembly of the cleaner in accordance with one embodiment of the present invention.
- FIG. 6 is a side view of the brush assembly of the cleaner in accordance with one embodiment of the present invention.
- FIGS. 7 and 8 are views showing operation of the brush assembly of the cleaner in accordance with one embodiment of the present invention.
- a plurality of embodiments of a brush assembly of a cleaner in accordance with the present invention may exist, and the most embodiment will be described.
- FIG. 2 is a side view of a robot cleaner in accordance with one embodiment of the present invention
- FIG. 3 is a rear view of the robot cleaner in accordance with one embodiment of the present invention
- FIG. 4 is a sectional view of the robot cleaner in accordance with one embodiment of the present invention.
- the robot cleaner in accordance with the present invention includes: a cleaner main body 10 ; a suction fan 12 mounted in the cleaner main body 10 , for generating a suction force of the cleaner; a filter container 16 mounted in front of the suction fan 12 and having therein a filter 14 for collecting dirt or filth sucked by the suction fan 12 ; a suction opening 20 connected to the filter container 16 through a suction pipe 18 and formed at a lower side of the main body 10 to suck dirt or filth on a floor 30 ; and a brush assembly 22 rotatably mounted at one side of the suction opening 20 , for sweeping up the dirt and filth from the floor 30 .
- An ultrasonic wave transmitter 24 for transmitting ultrasonic waves when the cleaner main body 10 moves, and an ultrasonic wave receiver 26 for receiving the ultrasonic waves transmitted from the ultrasonic wave transmitter 24 are mounted at the front of the cleaner main body 10 to detect a position of an obstacle.
- a charging terminal 28 is mounted at a rear of the cleaner main body 10 , and a battery 32 is charged as the charging terminal 28 is connected to a connection terminal 42 installed on a wall 40 of a room.
- a light emitting unit 34 for inducing the charging terminal 28 to the connection terminal 42 is installed at the rear of the cleaner main body 10
- a light receiving unit 44 for receiving an optical signal emitted from the light emitting unit 34 is installed on the wall 40 of the room, where the connection terminal 42 is installed.
- a pair of driving wheels 38 driven by a motor 36 , and auxiliary wheels 48 supporting the cleaner main body 10 and maintaining a horizontal state are mounted at a lower side of the cleaner main body 10 .
- FIG. 5 is a perspective view of a brush assembly in accordance with one embodiment of the present invention
- FIG. 6 is a side view of the brush assembly in accordance with one embodiment of the present invention.
- the brush assembly 22 includes: a driving motor 50 mounted at the main body 10 , for generating a rotary force; a brush 52 rotatably disposed at the suction opening 20 ; and a driving force transfer device 58 installed between a rotary shaft 54 of the driving motor 50 and a rotary shaft 56 of the brush 52 to transfer a rotary force of the driving motor 50 to the brush 52 , and protecting the driving motor 50 by preventing a load generated at the brush 52 , for example, as the brush 52 is caught by a stuff, from being transferred to the driving motor 50 .
- the driving force transfer device 58 includes a first magnet 60 mounted at a rotary shaft 54 of the driving motor 50 to be rotated therewith; and a second magnet 62 mounted at a rotary shaft 56 of the brush 52 and disposed to face the first magnet 60 , so that an attractive force works between the first magnet 60 and the second magnet 62 .
- each of the first magnet 60 and the second magnet 62 is formed as a disc shape, and the attractive force working between the first magnet 60 and the second magnet 62 is set to be smaller than a rotary force of the driving motor 50 .
- surfaces of the first magnet 60 and the second magnet 62 which face each other, have opposite polarities, so that an attractive force can work between the first magnet 60 and the second magnet 62 .
- a facing surface of the first magnet 60 has a north (N) pole
- a facing surface of the second magnet 62 has a south (S) pole.
- the driving force transfer device includes a magnetic body (not shown) mounted at the rotary shaft 54 of the driving motor 50 ; and a magnet (not shown) mounted at the rotary shaft 56 of the brush 52 and disposed to face the magnetic body. Therefore, a rotary force of the driving motor 50 is transferred to the brush 52 by an attractive force working between the magnetic body and the magnet. If a load is generated, for example, as the brush 52 is caught by a stuff, a magnetism of the magnet is overcome, and only the magnetic body is rotated, thereby preventing transfer of the load generated at the brush to the driving motor 50 .
- a magnet (not shown) is mounted at the rotary shaft 54 of the driving motor 50
- a magnetic body (not sown) is mounted at the rotary shaft 56 of the brush 52 , wherein the magnet and the magnetic body are disposed to face each other.
- FIGS. 7 and 8 are views showing the operation of the brush assembly of the cleaner in accordance with the present invention.
- the brush is rotated 52 , sweeping up the dirt and filth from the floor into the suction opening 20 .
- a rotary force of the driving motor 50 is transferred to the brush 52 through the driving force transfer device 58 , thereby rotating the brush 52 .
- the driving force transfer device 58 will now be described. First, as shown in FIG. 7 , when the driving motor 50 is driven, the first magnet 60 mounted at the rotary shaft 54 of the driving motor 50 is rotated, and the second magnet 62 positioned to face the first magnet 60 is rotated by an attractive force working between itself and the first magnet 60 , thereby rotating the second brush 52 connected to the second magnet 62 .
- the driving motor 50 is continuously and normally rotated because the rotary force of the driving motor 50 is greater than the attractive force working between the first magnet 60 and the second magnet 62 . Accordingly, the driving motor damage due to an overload can be prevented.
- the first magnet and the second magnet are disposed between the driving motor and the brush in a facing manner, and a rotary force of the driving motor is transferred to the brush by an attractive force working between the first magnet and the second magnet, so that the driving motor is normally rotated even if rotation of the brush is stopped as the brush is caught by a stuff or the like. Accordingly, the driving motor can be prevented from being damaged by an overload.
- the brush is driven only by a force corresponding to an attractive force working between the first magnet and the second magnet, if friction severely occurs between the brush and the floor, the brush stops rotating, thereby preventing floor damage.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
A brush assembly of a cleaner includes a driving motor mounted at a cleaner main body, for generating a rotary force; a brush rotatably disposed at a suction opening formed at the cleaner main body; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor. Accordingly, the driving motor can be continuously rotated even if the brush cannot be rotated by being caught by a stuff or the like, thereby preventing motor damage.
Description
- 1. Field of the Invention
- The present invention relates to a brush assembly of a cleaner, and particularly, to a brush assembly of a cleaner capable of preventing motor damage by keeping the motor rotating when a brush cannot be rotated by being caught by a stuff or the like.
- 2. Description of the Background Art
- In general, a robot cleaner performs a cleaning operation while moving for itself without manipulation of a user, moves to a charging station if power of a battery is consumed during cleaning, and moves back to a cleaning zone to perform a cleaning operation when the battery charge is completed.
- A brush assembly for sweeping up dirt or foreign substances from a floor is installed at a suction opening through which dirt is sucked, of the robot cleaner.
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FIG. 1 is a side view showing a brush assembly of a robot cleaner in accordance with the conventional art. - The brush assembly in accordance with the conventional art includes a
driving motor 102 for generating a rotary force; abrush 106 rotatably installed at a suction opening of the robot cleaner, for sweeping up dirt and foreign substances from a floor; and a drivingforce transfer device 120 for transferring a rotary force of the drivingmotor 102 to thebrush 106. - Here, the driving
force transfer device 120 includes adriving pulley 108 mounted at arotary shaft 104 of thedriving motor 102; a drivenpulley 110 mounted at arotary shaft 116 of thebrush 106; and abelt 112 wound between thedriving pulley 108 an the drivenpulley 110 to transfer a driving force. - In another embodiment, the driving force transfer device includes a driving gear mounted at the rotary shaft of the driving motor; and a driven gear mounted at the rotary shaft of the brush, and transfers a driving force as the driving gear and the driven gear are engaged with each other.
- However, because the brush driving force transfer device in accordance with the conventional art mechanically transfers a rotary force of the driving motor to the brush, a motor overload occurs as the brush cannot be rotated by being caught by a stuff or the like, causing motor damage.
- Therefore, an object of the present invention is to provide a brush assembly of a cleaner capable of preventing motor damage by normally rotating a driving motor when a brush cannot be rotated by being caught by a stuff or the like.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a brush assembly of a cleaner comprising: a driving motor mounted at a cleaner main body, for generating a rotary force; a brush rotatably disposed at a suction opening formed at the cleaner main body; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor.
- The driving force transfer device comprises: a first magnet mounted at a rotary shaft of the driving motor; and a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.
- The attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.
- The driving force transfer device comprises: a magnetic body mounted at a rotary shaft of the motor; and a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.
- The driving force transfer device comprises: a magnet mounted at a rotary shaft of the driving motor; and a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.
- To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a brush assembly of a robot cleaner provided with a suction opening at the center of a bottom of a cleaner main body, performing a cleaning operation while moving for itself, and automatically charging a battery, comprising: a driving motor mounted at the cleaner main body, for generating a rotary force; a brush rotatably disposed at the suction opening; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring the rotary force of the driving motor to the brush, and preventing transfer of a load generated at the brush to the motor.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a unit of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
- In the drawings:
-
FIG. 1 is a side view showing a brush assembly of a cleaner in accordance with the conventional art; -
FIG. 2 is a front view of a cleaner in accordance with one embodiment of the present invention; -
FIG. 3 is a rear view of the cleaner in accordance with one embodiment of the present invention; -
FIG. 4 is a sectional view of the cleaner in accordance with one embodiment of the present invention; -
FIG. 5 is a perspective view of a brush assembly of the cleaner in accordance with one embodiment of the present invention; -
FIG. 6 is a side view of the brush assembly of the cleaner in accordance with one embodiment of the present invention; and -
FIGS. 7 and 8 are views showing operation of the brush assembly of the cleaner in accordance with one embodiment of the present invention. - Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
- A plurality of embodiments of a brush assembly of a cleaner in accordance with the present invention may exist, and the most embodiment will be described.
-
FIG. 2 is a side view of a robot cleaner in accordance with one embodiment of the present invention,FIG. 3 is a rear view of the robot cleaner in accordance with one embodiment of the present invention, andFIG. 4 is a sectional view of the robot cleaner in accordance with one embodiment of the present invention. - The robot cleaner in accordance with the present invention includes: a cleaner
main body 10; asuction fan 12 mounted in the cleanermain body 10, for generating a suction force of the cleaner; afilter container 16 mounted in front of thesuction fan 12 and having therein afilter 14 for collecting dirt or filth sucked by thesuction fan 12; a suction opening 20 connected to thefilter container 16 through asuction pipe 18 and formed at a lower side of themain body 10 to suck dirt or filth on afloor 30; and abrush assembly 22 rotatably mounted at one side of the suction opening 20, for sweeping up the dirt and filth from thefloor 30. - An
ultrasonic wave transmitter 24 for transmitting ultrasonic waves when the cleanermain body 10 moves, and anultrasonic wave receiver 26 for receiving the ultrasonic waves transmitted from theultrasonic wave transmitter 24 are mounted at the front of the cleanermain body 10 to detect a position of an obstacle. - A
charging terminal 28 is mounted at a rear of the cleanermain body 10, and abattery 32 is charged as thecharging terminal 28 is connected to aconnection terminal 42 installed on awall 40 of a room. In addition, alight emitting unit 34 for inducing thecharging terminal 28 to theconnection terminal 42 is installed at the rear of the cleanermain body 10, and alight receiving unit 44 for receiving an optical signal emitted from thelight emitting unit 34 is installed on thewall 40 of the room, where theconnection terminal 42 is installed. - A pair of driving
wheels 38 driven by amotor 36, andauxiliary wheels 48 supporting the cleanermain body 10 and maintaining a horizontal state are mounted at a lower side of the cleanermain body 10. -
FIG. 5 is a perspective view of a brush assembly in accordance with one embodiment of the present invention, andFIG. 6 is a side view of the brush assembly in accordance with one embodiment of the present invention. - The
brush assembly 22 includes: a drivingmotor 50 mounted at themain body 10, for generating a rotary force; abrush 52 rotatably disposed at thesuction opening 20; and a drivingforce transfer device 58 installed between arotary shaft 54 of thedriving motor 50 and arotary shaft 56 of thebrush 52 to transfer a rotary force of the drivingmotor 50 to thebrush 52, and protecting thedriving motor 50 by preventing a load generated at thebrush 52, for example, as thebrush 52 is caught by a stuff, from being transferred to the drivingmotor 50. - The driving
force transfer device 58 includes afirst magnet 60 mounted at arotary shaft 54 of the drivingmotor 50 to be rotated therewith; and asecond magnet 62 mounted at arotary shaft 56 of thebrush 52 and disposed to face thefirst magnet 60, so that an attractive force works between thefirst magnet 60 and thesecond magnet 62. - Here, each of the
first magnet 60 and thesecond magnet 62 is formed as a disc shape, and the attractive force working between thefirst magnet 60 and thesecond magnet 62 is set to be smaller than a rotary force of thedriving motor 50. - And, surfaces of the
first magnet 60 and thesecond magnet 62, which face each other, have opposite polarities, so that an attractive force can work between thefirst magnet 60 and thesecond magnet 62. Namely, as one embodiment, if a facing surface of thefirst magnet 60 has a north (N) pole, a facing surface of thesecond magnet 62 has a south (S) pole. - In another embodiment, the driving force transfer device includes a magnetic body (not shown) mounted at the
rotary shaft 54 of the drivingmotor 50; and a magnet (not shown) mounted at therotary shaft 56 of thebrush 52 and disposed to face the magnetic body. Therefore, a rotary force of the drivingmotor 50 is transferred to thebrush 52 by an attractive force working between the magnetic body and the magnet. If a load is generated, for example, as thebrush 52 is caught by a stuff, a magnetism of the magnet is overcome, and only the magnetic body is rotated, thereby preventing transfer of the load generated at the brush to thedriving motor 50. - In still another embodiment of the driving force transfer device, a magnet (not shown) is mounted at the
rotary shaft 54 of the drivingmotor 50, and a magnetic body (not sown) is mounted at therotary shaft 56 of thebrush 52, wherein the magnet and the magnetic body are disposed to face each other. - Operation of the cleaner in accordance with present invention will now be described.
-
FIGS. 7 and 8 are views showing the operation of the brush assembly of the cleaner in accordance with the present invention. - When a user presses an operation button, power of a
battery 32 is transmitted to thesuction fan 12, and thesuction fan 12 is driven. Then, a suction force is generated by the driving of thesuction fan 12, and thus dirt or filth on thefloor 30 are sucked to the suction opening 20 and collected in thefilter 14 through thesuction pipe 18. - At this time, the brush is rotated 52, sweeping up the dirt and filth from the floor into the suction opening 20. Namely, a rotary force of the driving
motor 50 is transferred to thebrush 52 through the drivingforce transfer device 58, thereby rotating thebrush 52. - The operation of the driving
force transfer device 58 will now be described. First, as shown inFIG. 7 , when thedriving motor 50 is driven, thefirst magnet 60 mounted at therotary shaft 54 of thedriving motor 50 is rotated, and thesecond magnet 62 positioned to face thefirst magnet 60 is rotated by an attractive force working between itself and thefirst magnet 60, thereby rotating thesecond brush 52 connected to thesecond magnet 62. - As shown in
FIG. 8 , even if thebrush 52 cannot be rotated as astuff 70 or the like is undesirably put between thebrush 52 and the suction opening 20 during a cleaning operation, the drivingmotor 50 is continuously and normally rotated because the rotary force of the drivingmotor 50 is greater than the attractive force working between thefirst magnet 60 and thesecond magnet 62. Accordingly, the driving motor damage due to an overload can be prevented. - In the brush assembly of the cleaner constructed and operated in such a manner, the first magnet and the second magnet are disposed between the driving motor and the brush in a facing manner, and a rotary force of the driving motor is transferred to the brush by an attractive force working between the first magnet and the second magnet, so that the driving motor is normally rotated even if rotation of the brush is stopped as the brush is caught by a stuff or the like. Accordingly, the driving motor can be prevented from being damaged by an overload.
- In addition, because the brush is driven only by a force corresponding to an attractive force working between the first magnet and the second magnet, if friction severely occurs between the brush and the floor, the brush stops rotating, thereby preventing floor damage.
- As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (12)
1. A brush assembly of a cleaner comprising:
a driving motor mounted at a cleaner main body, for generating a rotary force;
a brush rotatably disposed at a suction opening formed at the cleaner main body; and
a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor.
2. The brush assembly of claim 1 , wherein the driving force transfer device comprises:
a first magnet mounted at a rotary shaft of the driving motor; and
a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.
3. The brush assembly of claim 2 , wherein the attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.
4. The brush assembly of claim 1 , wherein the driving force transfer device comprises:
a magnetic body mounted at a rotary shaft of the motor; and
a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.
5. The brush assembly of claim 4 , wherein an attractive force working between the magnetic body and the magnet is set to be smaller than the rotary force of the driving motor.
6. The brush assembly of claim 1 , wherein the driving force transfer device comprises:
a magnet mounted at a rotary shaft of the driving motor; and
a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.
7. A brush assembly of a robot cleaner provided with a suction opening at the center of a bottom of a cleaner main body, performing a cleaning operation while moving for itself, and automatically charging a battery, comprising:
a driving motor mounted at the cleaner main body, for generating a rotary force;
a brush rotatably disposed at the suction opening; and
a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring the rotary force of the driving motor to the brush, and preventing transfer of a load generated at the brush to the motor.
8. The brush assembly of claim 7 , wherein the driving force transfer device comprises:
a first magnet mounted at a rotary shaft of the driving motor; and
a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.
9. The brush assembly of claim 8 , wherein the attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.
10. The brush assembly of claim 7 , wherein the driving force transfer device comprises:
a magnetic body mounted at a rotary shaft of the motor; and
a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.
11. The brush assembly of claim 10 , wherein the attractive force working between the magnetic body and the magnet is set to be smaller than the rotary force of the driving motor.
12. The brush assembly of claim 7 , the driving force transfer device comprises:
a magnet mounted at a rotary shaft of the driving motor; and
a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR63916/2004 | 2004-08-13 | ||
KR1020040063916A KR20060015082A (en) | 2004-08-13 | 2004-08-13 | Brush power transmission apparatus of robot cleaner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060032013A1 true US20060032013A1 (en) | 2006-02-16 |
Family
ID=36075613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/034,773 Abandoned US20060032013A1 (en) | 2004-08-13 | 2005-01-14 | Brush assembly of cleaner |
Country Status (3)
Country | Link |
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US (1) | US20060032013A1 (en) |
KR (1) | KR20060015082A (en) |
CN (1) | CN1732836A (en) |
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EP2417892A1 (en) * | 2009-06-30 | 2012-02-15 | LG Electronics Inc. | Robot cleaner |
CN103156547A (en) * | 2013-04-11 | 2013-06-19 | 苏州益节智能科技有限公司 | Intelligent vacuum cleaner |
JP2014518700A (en) * | 2011-05-03 | 2014-08-07 | コーニンクレッカ フィリップス エヌ ヴェ | A device including a movable function body and a safety mechanism for stopping the operation of the function body |
EP2762050A4 (en) * | 2011-09-29 | 2015-09-09 | Sharp Kk | Cleaning robot |
US9811089B2 (en) | 2013-12-19 | 2017-11-07 | Aktiebolaget Electrolux | Robotic cleaning device with perimeter recording function |
US9939529B2 (en) | 2012-08-27 | 2018-04-10 | Aktiebolaget Electrolux | Robot positioning system |
US9946263B2 (en) | 2013-12-19 | 2018-04-17 | Aktiebolaget Electrolux | Prioritizing cleaning areas |
US10045675B2 (en) | 2013-12-19 | 2018-08-14 | Aktiebolaget Electrolux | Robotic vacuum cleaner with side brush moving in spiral pattern |
US10149589B2 (en) | 2013-12-19 | 2018-12-11 | Aktiebolaget Electrolux | Sensing climb of obstacle of a robotic cleaning device |
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US10874274B2 (en) | 2015-09-03 | 2020-12-29 | Aktiebolaget Electrolux | System of robotic cleaning devices |
US11169533B2 (en) | 2016-03-15 | 2021-11-09 | Aktiebolaget Electrolux | Robotic cleaning device and a method at the robotic cleaning device of performing cliff detection |
US11122953B2 (en) | 2016-05-11 | 2021-09-21 | Aktiebolaget Electrolux | Robotic cleaning device |
US11474533B2 (en) | 2017-06-02 | 2022-10-18 | Aktiebolaget Electrolux | Method of detecting a difference in level of a surface in front of a robotic cleaning device |
US11921517B2 (en) | 2017-09-26 | 2024-03-05 | Aktiebolaget Electrolux | Controlling movement of a robotic cleaning device |
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WO2020237171A1 (en) * | 2019-05-23 | 2020-11-26 | Sharkninja Operating Llc | Drive system for a surface treatment apparatus and a surface treatment apparatus having the same |
Also Published As
Publication number | Publication date |
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CN1732836A (en) | 2006-02-15 |
KR20060015082A (en) | 2006-02-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, YOUNG-GIE;REEL/FRAME:016176/0247 Effective date: 20041227 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |