EP2186600A1 - Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton - Google Patents

Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton Download PDF

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Publication number
EP2186600A1
EP2186600A1 EP08019748A EP08019748A EP2186600A1 EP 2186600 A1 EP2186600 A1 EP 2186600A1 EP 08019748 A EP08019748 A EP 08019748A EP 08019748 A EP08019748 A EP 08019748A EP 2186600 A1 EP2186600 A1 EP 2186600A1
Authority
EP
European Patent Office
Prior art keywords
hood
inner sleeve
suction
ring
segment
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.)
Granted
Application number
EP08019748A
Other languages
German (de)
English (en)
Other versions
EP2186600B1 (fr
Inventor
Herbert Buchberger
Alexander Essing
Ingo VIEHBÖCK
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.)
Collomix Ruehr und Mischgeraete GmbH
Original Assignee
Collomix Ruehr und Mischgeraete GmbH
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 Collomix Ruehr und Mischgeraete GmbH filed Critical Collomix Ruehr und Mischgeraete GmbH
Priority to EP20080019748 priority Critical patent/EP2186600B1/fr
Publication of EP2186600A1 publication Critical patent/EP2186600A1/fr
Application granted granted Critical
Publication of EP2186600B1 publication Critical patent/EP2186600B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating 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
    • 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

Definitions

  • the known concrete grinder is designed as a hand-held angle grinder with a motor housing for an electric motor and an attached angle gear, which has the gear neck and the central drive shaft with an end-side threaded pin for mounting and holding the concrete grinding wheel by means of a clamping nut.
  • a suction device can be connected to the suction hood via a suction pipe and the grinding dust is extracted by suction.
  • the suction hood also has a protective function for a user by retaining abraded grit.
  • the funnel-shaped suction hood consists here in one piece of a funnel neck and a hood bell part formed thereon, wherein the suction hood with the funnel part is fixedly screwed to the gear neck.
  • the sealing brush ring resting on the grinding surface during grinding slows down the grinding movement, which unfavorably increases the handling force.
  • this force changes their depending on the support and position of the brush ring elements, so that is lost to an operator of the desirable direct contact with the grinding surface.
  • the bristle length of the sealing brush ring is reduced by wear.
  • the bristle length of the sealing brush ring may possibly only be so long that it no longer rests on the grinding surface with not yet worn grinding elements, but a relatively large gap between the sealing brush ring and the grinding surface is due to the large amounts of sanding dust and eroded abrasive in an inadmissible manner outside the extraction hood. This deficiency can only be remedied by replacing the entire suction hood with a new brush ring.
  • the object of the invention is to develop a generic concrete grinder so that an effective extraction of sanding dust and sanding material can be ensured regardless of the degree of wear of the grinding elements of the grinding wheel.
  • a distance compensation according to the wear of the grinding elements can be performed by a height adjustment of the suction hood. It is thus possible, a minimum distance of about 1 to 3 mm, preferably of about 2 mm, between the free edge of a protective ring of the suction hood, which engages over the concrete grinding wheel edge and adjust a grinding surface, which with increasing wear of the grinding elements or optionally at Replacement by a new grinding wheel is adjustable.
  • the distance of the guard ring edge to the Grinding surface is therefore on the one hand chosen so large that the required air intake is ensured by the environment for the suction and on the other hand by the relatively small gap gap no grinding dust from the suction hood penetrates to the outside.
  • the engagement nose is formed as a radially inwardly facing clamping lug on the clamping ring.
  • this clamping lug engages through an associated slot-shaped recess of the inner sleeve into the spiral groove on the gear neck.
  • the engagement nose can thus act in a further function when contracting the clamping ring as a clamping nose, which exerts a clamping fit at the bottom of the spiral groove.
  • the suction hood form multiple parts, such that the inner sleeve is rotatably received as a funnel neck in the central passage opening of a subsequent hood bell part of the suction hood.
  • the passage opening edge of the hood bell part is held between a lower radially projecting support flange of the inner sleeve and an upwardly spaced spring ring, preferably a snap ring on the inner sleeve, whereby a simple running pivot bearing between the inner sleeve and the hood bell part is formed.
  • a protective disk is used between the spring ring and the passage opening edge of the hood bell part to improve the ease of pivoting and as protection against scratching.
  • the hood bell part and / or an adjoining suction tube has an upwardly projecting extension as a torque transducer, which engages in a height-displaceable manner with respect to the transmission neck fixed torque support.
  • a suction tube is held non-rotatably on the concrete grinder.
  • forces are supported on the suction tube by a connected suction hose.
  • the clamping ring is arranged above the snap ring.
  • a height adjustment is easy to carry out when the inner sleeve is rotatable together with the clamping ring, in particular when the engagement nose is formed as a clamping lug on the clamping ring and engages through the slot-shaped recess of the inner sleeve into the spiral groove.
  • the engagement nose is formed as a clamping lug on the clamping ring and engages through the slot-shaped recess of the inner sleeve into the spiral groove.
  • at least one radially inwardly directed driving lug is attached to the clamping ring, which in a assigned catch opening engages the inner sleeve.
  • a respective driver nose can be attached to the dividing edge of the clamping ring as a vertical web and the driver opening is designed as an associated vertical slot in the inner casing.
  • a horizontally encircling engagement groove is formed according to claim 7 on the outer side of the inner sleeve into which the clamping ring engages with a correspondingly associated inner web.
  • the clamping ring can be designed in the manner of a clamp, wherein in each case at the dividing edge region, a radially projecting clamping block is attached.
  • a tangential clamping screw which can be manually operated via a knurling wheel is guided.
  • a clamping closure known per se could also be provided.
  • the above height adjustment of the suction hood for wear compensation of the grinding elements can be used in differently constructed concrete grinding.
  • This technique is particularly well suited according to claim 9 for a concrete grinder in the form of a hand-held angle grinder, in particular a concrete floor grinder with a tubular, usable as a handle motor housing for an electric motor and an angle gear connected to the Geretehals.
  • the central drive shaft is housed in pivot bearings with an end-side threaded pin for attaching the concrete grinding wheel and for mounting by means of a clamping screw.
  • the suction tube is formed in two parts, wherein a lower shell is integrally formed on the suction hood, in particular on the hood bell part.
  • the upper shell is placed as a separately manufactured component on the lower shell and fastened, in particular clipped.
  • a transversely extending bow handle which is arranged above the angle gear about a transverse axis pivotable and fixable so that the handle portion is in a forward pivoted position on a front angular segment of the hood and is pivoted in a réellegeschwenkten position from this area to the rear and lies approximately above the angle gear.
  • the bow handle is U-shaped and open on one side with a longer U-leg as a handle part, wherein the shorter U-leg is selectively connected to the left or right of the engine or transmission housing pivotable and lockable.
  • This provides an ergonomically favorable grip shape for both left-handed and right-handed users.
  • the hood segment part with a hood segment ring part, the inner sleeve pivotally surrounds.
  • the hood segment part covers a segment clearance of the suction hood from above and in the open position, the hood segment part is pivoted out of the region of the Segementokraums, so that this, and thus a revolving in Segementokrarum grinding wheel edge area are released.
  • the hood segment part is thus held captive on the suction hood or the inner sleeve and can be pivoted without tools in its respective function division.
  • the hood segment part is then held in both the closed position and in the open position by überdrückbare latching connections.
  • Fig. 1 to 3 views of the complete concrete grinder 1 are shown, which is designed as a hand-held angle grinder, in particular for concrete floor grinding work with a tubular, usable as a handle motor housing 2, in which an electric motor is received, which can be switched on and off with a switch 3.
  • the suction hood 9 is designed in several parts and consists in particular of an inner sleeve 11, which comprises a clamping ring 12 and a hood bell part 13.
  • the inner sleeve 11 is rotatably mounted in the hood bell part 13, wherein the hood bell part 13, the grinding wheel 8 engages over the edge with a guard ring 14.
  • the cowl bell part 13 has a forwardly directed portion as a segment clearance 15, which can be covered by a forwardly facing hood segment part 16.
  • the hood segment part 16 is pivotably held by a hood segment ring part 17 on the inner sleeve 11.
  • the segmental space 15 is covered and the suction hood 9 is closed as a whole.
  • the area of the segment free space 15 is released ( Fig. 2 ), so that there protrudes a portion 18 of the rotating grinding wheel 8, for example, for grinding work on the ground in a corner region to a side wall.
  • the hood segment part 16 is set and held in two functional positions.
  • a suction pipe 24 is connected, which extends below and parallel to the motor housing 2.
  • the Suction tube 24 is formed in two parts, wherein a lower shell 25 is integrally formed on the hood bell part 13 and a separate upper shell 26 is clipped onto the lower shell 25.
  • a connection clamping ring 27 is provided at the end of the suction pipe 24, which also holds the upper shell 26 and lower shell 25 of the suction pipe 24 together.
  • a U-shaped bow handle 28 Transverse to the motor housing 2 extends a U-shaped bow handle 28 having a longer U-leg as a handle portion 29, wherein the shorter U-leg 30 is either left or right on the motor housing 2 or slightly offset to the front of the transmission housing pivotally connected and lockable.
  • a radially inwardly projecting clamping nose 44 is formed, which engages through an associated slot-shaped recess 45 of the inner sleeve into a spiral groove 46 on the gear neck 5.
  • the clamping nose 44 and the slot-shaped recess 45 are also inclined according to the inclination of the spiral groove 46.
  • an upwardly projecting extension is formed as Drehmomentetzillon 47 in the region of the connection point of the suction tube 24, which is height-displaceably held in an insertion 48 of a housing-fixed, from the motor housing 2 facing downwards and transversely extending U-support bracket 49.
  • the height adjustment device 10 has the following function:
  • the lower guard ring edge of the hood bell part 13 can be positioned so that compared to the guard ring edge, the grinding elements by about mm project downward and thus a correspondingly large gap between the grinding surface and the guard ring 14 of the hood part 13 is created, on the one hand allows a sufficient air intake and on the other hand can leak small sanding dust. Due to the simple tool-free height adjustment, a simple and quick adaptation to wear of the grinding elements is possible. The respective height adjustment can be easily and quickly fixed with the clamping ring 12.
  • the suction hood 9 and thus also the torque transducer 47 is shown in the insertion opening 48 of the U-support bracket 49 in the lowermost position in which the guard ring 14, the grinding elements 22 of the grinding wheel 8 are covered.
  • the suction hood 9 and thus the torque transducer 47 is shown in the uppermost setting position, in which at a grinding wheel with new or little worn grinding rites 22 these project under the guard ring 14.
  • the easy-to-use height adjustment device 10 can between these two Adjusted extreme positions the above-explained gap setting of about 2 mm for optimal Schleifstaubabsaugung and fixed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP20080019748 2008-11-12 2008-11-12 Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton Expired - Fee Related EP2186600B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20080019748 EP2186600B1 (fr) 2008-11-12 2008-11-12 Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080019748 EP2186600B1 (fr) 2008-11-12 2008-11-12 Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton

Publications (2)

Publication Number Publication Date
EP2186600A1 true EP2186600A1 (fr) 2010-05-19
EP2186600B1 EP2186600B1 (fr) 2011-11-02

Family

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EP20080019748 Expired - Fee Related EP2186600B1 (fr) 2008-11-12 2008-11-12 Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton

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Country Link
EP (1) EP2186600B1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289989A (zh) * 2014-10-31 2015-01-21 浙江丽佳建筑装饰工程有限公司 一种多功能建筑墙面打磨装置
DE102015100118A1 (de) * 2015-01-07 2016-07-07 Metabowerke Gmbh Langhalsschleifer mit Staubschutzeinrichtung
EP3208039A1 (fr) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Meuleuse d'angle a collecteur de poussieres
EP3208040A1 (fr) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Meuleuse d'angle a collecteur de poussieres
DE102016106782A1 (de) * 2016-04-13 2017-10-19 Festool Gmbh Hand-Werkzeugmaschine mit einer Abdeckeinrichtung
EP3300839A1 (fr) * 2016-09-28 2018-04-04 Hilti Aktiengesellschaft Hotte de poussiere pour une machine a meuler
CN108225870A (zh) * 2018-04-23 2018-06-29 郑州大学 一种用于混凝土的磨粉装置
GB2604622A (en) * 2021-03-10 2022-09-14 Swisslogo Ag A guard for a rotatable wheel of a power tool
EP4227039A3 (fr) * 2022-01-19 2023-10-18 Hangzhou Kinty Tool Manufacture Co., Ltd Broyeur de béton et appareil de broyage de béton
CN118046154A (zh) * 2024-04-16 2024-05-17 四川交通职业技术学院 一种桥梁施工用焊接装置及方法
DE102013208809B4 (de) 2013-05-14 2025-09-18 Robert Bosch Gmbh Schutzhaubenvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001925A1 (de) 2012-02-02 2013-08-08 Schleif- und Fräswerkzeuge Höhn Ltd. & Co. KG Oberflächenschleifer, insbesondere Betonschleifer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8914346U1 (de) 1989-12-06 1990-01-25 Festo AG & Co, 73734 Esslingen Motorisch zu einer Rotationsbewegung antreibbares Werkzeug
DE10339335A1 (de) 2003-08-25 2005-03-31 Robert Bosch Gmbh Schleifhandwerkzeugmaschine
CH694756A5 (de) 1999-05-15 2005-07-15 Bosch Gmbh Robert Handgeführter Betonschleifer.
WO2008033377A2 (fr) 2006-09-12 2008-03-20 Black & Decker Inc. Outil de ponçage avec ensemble de tête couplé par pivotement
DE102006041671A1 (de) 2006-09-06 2008-03-27 Robert Bosch Gmbh Schutzhaube einer Handwerkzeugmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8914346U1 (de) 1989-12-06 1990-01-25 Festo AG & Co, 73734 Esslingen Motorisch zu einer Rotationsbewegung antreibbares Werkzeug
CH694756A5 (de) 1999-05-15 2005-07-15 Bosch Gmbh Robert Handgeführter Betonschleifer.
DE10339335A1 (de) 2003-08-25 2005-03-31 Robert Bosch Gmbh Schleifhandwerkzeugmaschine
DE102006041671A1 (de) 2006-09-06 2008-03-27 Robert Bosch Gmbh Schutzhaube einer Handwerkzeugmaschine
WO2008033377A2 (fr) 2006-09-12 2008-03-20 Black & Decker Inc. Outil de ponçage avec ensemble de tête couplé par pivotement

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013208809B4 (de) 2013-05-14 2025-09-18 Robert Bosch Gmbh Schutzhaubenvorrichtung
CN104289989A (zh) * 2014-10-31 2015-01-21 浙江丽佳建筑装饰工程有限公司 一种多功能建筑墙面打磨装置
DE102015100118A1 (de) * 2015-01-07 2016-07-07 Metabowerke Gmbh Langhalsschleifer mit Staubschutzeinrichtung
EP3042738A3 (fr) * 2015-01-07 2016-10-19 Metabowerke GmbH Ponceuse a bras girafe comprenant un dispositif de protection contre la poussiere
WO2017140657A1 (fr) * 2016-02-17 2017-08-24 Hilti Aktiengesellschaft Collecteur de poussière de meuleuse d'angle
WO2017140655A1 (fr) * 2016-02-17 2017-08-24 Hilti Aktiengesellschaft Collecteur de poussière de meuleuse d'angle
EP3208040A1 (fr) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Meuleuse d'angle a collecteur de poussieres
CN108698199A (zh) * 2016-02-17 2018-10-23 喜利得股份公司 角磨机防尘罩
EP3208039A1 (fr) * 2016-02-17 2017-08-23 HILTI Aktiengesellschaft Meuleuse d'angle a collecteur de poussieres
US11878384B2 (en) 2016-04-13 2024-01-23 Festool Gmbh Portable power tool having a covering device
DE102016106782A1 (de) * 2016-04-13 2017-10-19 Festool Gmbh Hand-Werkzeugmaschine mit einer Abdeckeinrichtung
EP3300839A1 (fr) * 2016-09-28 2018-04-04 Hilti Aktiengesellschaft Hotte de poussiere pour une machine a meuler
WO2018059915A1 (fr) * 2016-09-28 2018-04-05 Hilti Aktiengesellschaft Collecteur de poussière d'une meuleuse
CN109689306A (zh) * 2016-09-28 2019-04-26 喜利得股份公司 用于研磨设备的防尘罩
CN109689306B (zh) * 2016-09-28 2022-05-13 喜利得股份公司 用于研磨设备的防尘罩
CN108225870A (zh) * 2018-04-23 2018-06-29 郑州大学 一种用于混凝土的磨粉装置
CN108225870B (zh) * 2018-04-23 2024-03-01 郑州大学 一种用于混凝土的磨粉装置
WO2022189569A1 (fr) * 2021-03-10 2022-09-15 Swisslogo Ag Protection pour roue rotative d'outil motorisé
US12240077B2 (en) 2021-03-10 2025-03-04 Swisslogo Ag Guard for a rotatable wheel of a power tool
GB2604622B (en) * 2021-03-10 2025-04-02 Swisslogo Ag A guard for a rotatable wheel of a power tool
GB2604622A (en) * 2021-03-10 2022-09-14 Swisslogo Ag A guard for a rotatable wheel of a power tool
EP4227039A3 (fr) * 2022-01-19 2023-10-18 Hangzhou Kinty Tool Manufacture Co., Ltd Broyeur de béton et appareil de broyage de béton
CN118046154A (zh) * 2024-04-16 2024-05-17 四川交通职业技术学院 一种桥梁施工用焊接装置及方法

Also Published As

Publication number Publication date
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