EP1492646B1 - A system for grinding floor surfaces - Google Patents

A system for grinding floor surfaces Download PDF

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Publication number
EP1492646B1
EP1492646B1 EP03710559A EP03710559A EP1492646B1 EP 1492646 B1 EP1492646 B1 EP 1492646B1 EP 03710559 A EP03710559 A EP 03710559A EP 03710559 A EP03710559 A EP 03710559A EP 1492646 B1 EP1492646 B1 EP 1492646B1
Authority
EP
European Patent Office
Prior art keywords
grinding
drive motor
grinding machine
operator
control unit
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.)
Expired - Lifetime
Application number
EP03710559A
Other languages
German (de)
French (fr)
Other versions
EP1492646A1 (en
Inventor
Håkan THYSELL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HTC Sweden AB
Original Assignee
HTC Sweden AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HTC Sweden AB filed Critical HTC Sweden AB
Publication of EP1492646A1 publication Critical patent/EP1492646A1/en
Application granted granted Critical
Publication of EP1492646B1 publication Critical patent/EP1492646B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces

Definitions

  • the present invention relates to a system according to the pre-characterising clause of claim 1.
  • US 6238277 B1 discloses a mobile machine of the said type.
  • EP 0 845 326 A1 discloses a floor grinding machine having a motor-driven grinding or polishing disc, moved across the floor surface to be treated, enclosed by a housing provided with a handle for guiding the movement of the device across the floor.
  • the grinding or polishing disc is formed by four smaller discs positioned in a circle and simultaneously driven in different directions.
  • the object of the present invention is to release the operator of the grinding machine from the actual propulsion of the machine. This is achieved in that the invention has the features specified in the characterising part of the patent claim.
  • the invention furthermore affords the advantage that a dust/sludge suction unit, which is coupled to the grinding machine via a suction hose, can be located in close proximity to the grinding machine in the space normally occupied by the operator.
  • the suction hose can thereby be made shorter so that the flow losses therein are reduced and the suction capacity is increased. If this increased suction capacity cannot be utilised in order to improve the result, there is the alternative option of reducing the energy required for the suction, thereby achieving an energy saving.
  • the operator is normally not required to continuously steer the machine but can concentrate on monitoring the grinding result and if necessary increasing or reducing the rate of advance, removing any obstacles or even controlling more than one grinding machine.
  • FIG. 1 generally denotes a mobile machine for grinding floor surfaces according to the present invention.
  • Fig. 1 shows how a dust suction unit 3 is connected to the grinding machine 1 by a very short suction hose 2.
  • the short suction hose 2 affords great advantages and is possible due to the fact that the dust suction unit 3 can be located in the space normally occupied by an operator.
  • the grinding machine comprises a housing 1a with a drive motor 1b arranged thereon and is supported partly by two wheels 4, 5 and partly by grinding disks 1c1, 1c2, 1c3, 1c4 located at the bottom of the housing and rotatably supported on a planet disk 1d.
  • a drive motor 1b arranged thereon and is supported partly by two wheels 4, 5 and partly by grinding disks 1c1, 1c2, 1c3, 1c4 located at the bottom of the housing and rotatably supported on a planet disk 1d.
  • these are operatively connected to the motor 1b in a manner not further specified here, since this operative connection is not the subject matter of the present invention.
  • a drive motor 4a, 5a is mechanically connected to each wheel 4, 5 and is in turn electrically connected by leads 4b, 5b to a control unit 6.
  • the latter comprises means, familiar to the person skilled in the art, for controlling the motors 4a, 4b and hence the direction of rotation and the rotational speed of the wheels 4, 5 as a function of control signals from an operating device 7, which is manually actuated by an operator 8.
  • the control signals are transmitted from the operating device 7 to the control unit 6 via radio communications units in the operating device 7 and the control unit 6, as illustrated by antennae 6a and 7a connected to these respectively.
  • the arrangement according to the invention allows the operator 8, from a location affording a good, clear view of the floor surface that is to be ground, to carry out this grinding and, if so required, to briefly study the grinding result at close quarters, and if required to control the machine in order to locally repeat the grinding.
  • the said electrical cables are suitably brought together on a carriage (not shown) or suspended above the floor surface that is to be ground.

Abstract

The present invention relates to an arrangement in a mobile machine ( 1 ) for grinding floor surfaces, comprising a housing ( 1 a), which is supported partly by two wheels ( 4, 5 ) and partly by a number of rotatably supported grinding disks ( 1 c 1, 1 c 2, 1 c 3, 1 c 4 ), which are distributed over planet disk ( 1 d) rotatably supported at the bottom of the housing ( 1 a) and are operatively connected to a drive motor ( 1 b), the planet disk ( 1 d) being designed to be driven by the drive motor ( 1 b). The grinding disks are four in number and the arrangement comprises a drive motor ( 4 a, 5 a) mechanically connected to each wheel ( 4, 5 ) and a control unit ( 6 ) influencing the direction of rotation and the rotational speed of the drive motors ( 4 a, 5 a), the control unit being operatively connected via a radio communications unit to an operating device ( 7 ). The latter is designed for manual actuation by an operator ( 8 ) for remote control of the grinding machine ( 1 ).

Description

  • The present invention relates to a system according to the pre-characterising clause of claim 1.
  • US 6238277 B1 discloses a mobile machine of the said type.
  • EP 0 845 326 A1 discloses a floor grinding machine having a motor-driven grinding or polishing disc, moved across the floor surface to be treated, enclosed by a housing provided with a handle for guiding the movement of the device across the floor. The grinding or polishing disc is formed by four smaller discs positioned in a circle and simultaneously driven in different directions.
  • In grinding floor surfaces the rate at which the grinding machine is advanced by an operator is naturally determined by the time it takes to obtain an acceptable grinding result. This rate is normally only a fraction of normal walking pace, something that the person advancing the machine ultimately finds very uncomfortable and tiring. Although it would be possible to advance the machine at normal walking pace, this would then involve the need for repeated grinding, which may result in a failure to observe any occurrence of sections where the grinding result is unacceptable.
  • The object of the present invention is to release the operator of the grinding machine from the actual propulsion of the machine. This is achieved in that the invention has the features specified in the characterising part of the patent claim.
  • The subordinate claims indicate alternative operative connections between operating devices and the control unit forming part of the arrangement according to the invention.
  • The invention furthermore affords the advantage that a dust/sludge suction unit, which is coupled to the grinding machine via a suction hose, can be located in close proximity to the grinding machine in the space normally occupied by the operator. The suction hose can thereby be made shorter so that the flow losses therein are reduced and the suction capacity is increased. If this increased suction capacity cannot be utilised in order to improve the result, there is the alternative option of reducing the energy required for the suction, thereby achieving an energy saving.
  • The operator is normally not required to continuously steer the machine but can concentrate on monitoring the grinding result and if necessary increasing or reducing the rate of advance, removing any obstacles or even controlling more than one grinding machine.
  • The invention will be explained in more detail below with reference to figures attached, of which:
    • Fig. 1
    shows, in schematic form, a perspective front view of a grinding machine according to the invention having a dust suction unit coupled thereto by a short suction hose;
    Fig. 2
    shows, by way of example, a plan view of the grinding machine according to Fig. 1 from the rear and how an operator controls the grinding machine remotely;
    Fig. 3
    shows grinding disks arranged on a planet disk.
  • In the drawing 1 generally denotes a mobile machine for grinding floor surfaces according to the present invention. Fig. 1 shows how a dust suction unit 3 is connected to the grinding machine 1 by a very short suction hose 2. As already stated, the short suction hose 2 affords great advantages and is possible due to the fact that the dust suction unit 3 can be located in the space normally occupied by an operator.
  • The grinding machine comprises a housing 1a with a drive motor 1b arranged thereon and is supported partly by two wheels 4, 5 and partly by grinding disks 1c1, 1c2, 1c3, 1c4 located at the bottom of the housing and rotatably supported on a planet disk 1d. For driving the planet disk 1d and the grinding disks 1c1, 1 c2, 1c3, 1c4, these are operatively connected to the motor 1b in a manner not further specified here, since this operative connection is not the subject matter of the present invention.
  • According to the invention, a drive motor 4a, 5a is mechanically connected to each wheel 4, 5 and is in turn electrically connected by leads 4b, 5b to a control unit 6. The latter comprises means, familiar to the person skilled in the art, for controlling the motors 4a, 4b and hence the direction of rotation and the rotational speed of the wheels 4, 5 as a function of control signals from an operating device 7, which is manually actuated by an operator 8. The control signals are transmitted from the operating device 7 to the control unit 6 via radio communications units in the operating device 7 and the control unit 6, as illustrated by antennae 6a and 7a connected to these respectively. The arrangement according to the invention allows the operator 8, from a location affording a good, clear view of the floor surface that is to be ground, to carry out this grinding and, if so required, to briefly study the grinding result at close quarters, and if required to control the machine in order to locally repeat the grinding.
  • The operator is naturally able, whenever appropriate, to carry out the grinding in the hitherto conventional way, that is to say by manually guiding the machine 1 by means of control handles le and controls If provided thereon. Also visible on the drawing are connections 1g for electrical cables supplying the motor 1b and the control unit 6. The said electrical cables are suitably brought together on a carriage (not shown) or suspended above the floor surface that is to be ground.

Claims (4)

  1. A system for grinding floor surfaces, comprising a mobile floor grinding machine (1) comprising a housing (1a), which is supported only by two wheels (4, 5) and a number of rotatably supported grinding disks (1c1, 1c2, 1c3, 1c4), which are distributed over a planet disk (1d) rotatably supported at the bottom of the housing (1a) and are operatively connected to a drive motor (1b), the planet disk (1d) being designed to be driven by the drive motor (1b), wherein the grinding disks are four in number, characterized in that the floor grinding machine comprises a respective drive motor (4a, 5a) mechanically connected to each wheel (4,5), and a control unit (6) influencing the direction of rotation and the rotational speed of the drive motors (4a, 5a), the control unit being operatively connected via a radio communications unit to an operating device (7), designed for manual actuation by an operator (8) for remote control of the grinding machine (1).
  2. The system as claimed in claim 1, further comprising a dust/sludge suction unit, which is coupled to the grinding machine via a suction hose, and located in the space normally occupied by the operator.
  3. The system as claimed in claim 1 or 2, wherein a dust suction unit (3) is connected to the floor grinding machine.
  4. The system as claimed in claim 3, wherein dust suction unit (3) is located in the space normally occupied by an operator.
EP03710559A 2002-03-12 2003-02-26 A system for grinding floor surfaces Expired - Lifetime EP1492646B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0200743 2002-03-12
SE0200743A SE525499C2 (en) 2002-03-12 2002-03-12 Device on a mobile machine for grinding floor surfaces
PCT/SE2003/000311 WO2003076131A1 (en) 2002-03-12 2003-02-26 Arrangement in a mobile machine for grinding floor surfaces

Publications (2)

Publication Number Publication Date
EP1492646A1 EP1492646A1 (en) 2005-01-05
EP1492646B1 true EP1492646B1 (en) 2010-09-15

Family

ID=20287237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03710559A Expired - Lifetime EP1492646B1 (en) 2002-03-12 2003-02-26 A system for grinding floor surfaces

Country Status (8)

Country Link
US (1) US20050164616A1 (en)
EP (1) EP1492646B1 (en)
AT (1) ATE481213T1 (en)
AU (1) AU2003214735A1 (en)
DE (1) DE60334197D1 (en)
DK (1) DK1492646T3 (en)
SE (1) SE525499C2 (en)
WO (1) WO2003076131A1 (en)

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US10029341B2 (en) 2014-09-25 2018-07-24 Husqvarna Ab Floor surfacing machine
US10729300B2 (en) 2014-09-25 2020-08-04 Husqvarna Ab Floor surfacing machine
EP3525985B1 (en) * 2016-10-17 2023-06-14 Husqvarna AB Safety arrangement and method for a floor surfacing machine

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US20090023369A1 (en) * 2004-02-13 2009-01-22 Htc Sweden Ab Floor processing machine with tiltable finishing units
US7235003B2 (en) 2004-03-26 2007-06-26 Htc Sweden Ab Method and apparatus for grinding of concrete floors
DE102005062587A1 (en) * 2005-12-27 2007-06-28 Robert Bosch Gmbh Grinding system for grinding workpieces has control unit prepared to provide automatic steering of grinding tool through control of movement device
US20070155285A1 (en) * 2006-01-05 2007-07-05 Cpt, Inc. Riding floor polishing machine
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WO2009027140A1 (en) * 2007-08-30 2009-03-05 Beat Hansemann Floor grinding machine
WO2009041888A1 (en) * 2007-09-28 2009-04-02 Htc Sweden Ab Method and device for creating a stream of air for removing residue particles formed in connection with cutting, grinding and/or polishing of a stone or stone-like material
SE535278C2 (en) * 2010-12-10 2012-06-12 Jan Urban Thysell Device for grinding wherein the device is mobile and includes, inter alia, a freely rotating planetary disk and rotary connected grinding wheels connected via electric motors
EP2741891B1 (en) 2011-08-08 2017-08-30 Veen Holdings Pty Ltd. Grinding apparatus
CN104625901A (en) * 2013-11-07 2015-05-20 丹阳智盛合金有限公司 Aluminum plate grinding machine
AU2017200855B2 (en) * 2014-09-25 2018-02-22 Husqvarna Ab Floor surfacing machine
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AU2017200856B2 (en) * 2014-09-25 2018-02-15 Husqvarna Ab Floor surfacing machine
SE542094C2 (en) * 2014-10-21 2020-02-25 Scanmaskin Sverige Ab Method for achieving efficient and cost-saving sanding of floors and the like
CN105058184A (en) * 2015-08-12 2015-11-18 丹阳市超宇五金磨具有限公司 Remote control wall face grinder
SE541067C2 (en) 2016-06-03 2019-03-26 Husqvarna Ab Floor grinding machine and method of setting a handle for a floor grinding machine
US11633831B2 (en) 2016-06-03 2023-04-25 Husqvarna Ab Grinding head for floor grinding machine comprising at least one belt pulley, floor grinding machines and methods
SE542092C2 (en) 2016-06-03 2020-02-25 Husqvarna Ab Grinding head for floor grinding machine and a floor grinding machine comprising such a grinding head
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Publication number Priority date Publication date Assignee Title
US10029341B2 (en) 2014-09-25 2018-07-24 Husqvarna Ab Floor surfacing machine
US10729300B2 (en) 2014-09-25 2020-08-04 Husqvarna Ab Floor surfacing machine
US11759077B2 (en) 2014-09-25 2023-09-19 Husqvarna Ab Floor surfacing machine
EP3525985B1 (en) * 2016-10-17 2023-06-14 Husqvarna AB Safety arrangement and method for a floor surfacing machine

Also Published As

Publication number Publication date
SE0200743D0 (en) 2002-03-12
ATE481213T1 (en) 2010-10-15
US20050164616A1 (en) 2005-07-28
SE525499C2 (en) 2005-03-01
DE60334197D1 (en) 2010-10-28
DK1492646T3 (en) 2011-01-17
EP1492646A1 (en) 2005-01-05
SE0200743L (en) 2003-09-13
AU2003214735A1 (en) 2003-09-22
WO2003076131A1 (en) 2003-09-18

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