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EP1925401B1 - Meuleuse portative à moteur avec mécanisme d'aspiration réglable - Google Patents

Meuleuse portative à moteur avec mécanisme d'aspiration réglable Download PDF

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Publication number
EP1925401B1
EP1925401B1 EP20060024164 EP06024164A EP1925401B1 EP 1925401 B1 EP1925401 B1 EP 1925401B1 EP 20060024164 EP20060024164 EP 20060024164 EP 06024164 A EP06024164 A EP 06024164A EP 1925401 B1 EP1925401 B1 EP 1925401B1
Authority
EP
European Patent Office
Prior art keywords
airway
suction
grinding
hand
grinding plate
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.)
Active
Application number
EP20060024164
Other languages
German (de)
English (en)
Other versions
EP1925401A1 (fr
Inventor
Stefan Dipl.-Ing. Tulodziecki
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.)
Festool GmbH
Original Assignee
Festool 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 Festool GmbH filed Critical Festool GmbH
Priority to EP20060024164 priority Critical patent/EP1925401B1/fr
Priority to DE200650002614 priority patent/DE502006002614D1/de
Publication of EP1925401A1 publication Critical patent/EP1925401A1/fr
Application granted granted Critical
Publication of EP1925401B1 publication Critical patent/EP1925401B1/fr
Active 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
    • 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
    • B24B7/182—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
    • 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
    • B24B55/06—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

Definitions

  • the invention relates to a motor-driven hand grinder with a rotating during operation about a Rotationsachsline grinding pad on which the workpiece to be sanded underside a planar shape exhibiting abrasive is fastened, wherein the sanding pad has air passage openings, so that by means of a suction device air from the bottom of the sanding pad ago can be sucked through the flow openings and a subsequent airway.
  • the sanding pad usually has distributed over its surface arranged through openings, through which the dust air, in which the resulting in the workpiece machining dust particles are sucked off and fed to a dust collector mounted on the sander, for example in the form of a filter bag, or in a separate, connected to the grinder via a suction hose vacuum cleaner can be arranged with a dust separator downstream in the flow direction vacuum generator.
  • Motor-driven hand grinders are also used for sanding building ceilings, so you have to work overhead.
  • Such grinding devices are usually equipped with a rod-like elongated retaining element on which they can be held by the user up against the ceiling.
  • the grinder for the user makes it easier. This is done with simultaneous extraction of the resulting dust particles during grinding.
  • this suction effect can be adjusted by an additional opening with a variable cross section in the suction hood.
  • This variable opening allows the entry of false air in Absaugspalt between the sanding pad and the suction hood, whereby the suction effect can be reduced.
  • the present invention is therefore an object of the invention to provide for the adjustment of the suction effect an alternative solution.
  • a grinding device according to claim 1, wherein between the outer periphery of the sanding pad and the suction hood, an annular circumferential suction gap is formed, which is connected to a second airway, so that air can be sucked through the Absaugspalt and the second airway, and that an adjustable between two positions adjusting device is present, which is assigned to either two airways, so that in each of the two positions one of the airways is free and the other airway is shut off, or only the associated with the second airway, so that in the two positions at free first airway of the second airway is free or shut off.
  • suction hood of this type is known per se.
  • This operating mode is therefore preferably used when grinding a building wall or the same area.
  • the respective hand grinder 1a 1b; 1 c is powered by a motor and is used for grinding building ceilings 2, but it can also be used for sanding building sidewalls or other surfaces.
  • the grinder 1a; 1b; 1c to hold against the ceiling 2 it may be provided with a not shown, rod-like elongated support member which is gripped by the user.
  • the grinder may also comprise a handgrip assembly formed from or disposed on its device housing, such that the rod-like elongate retainer is not necessarily required when the user can reach the surface to be sanded with the grinder held by him on the handle assembly.
  • Each illustrated hand grinder 1a; 1b; 1c has a grinding plate 4 rotating during operation about a rotation axis line 3.
  • the sanding pad 4 is detachably attached to an output shaft 5 whose center line is the axis of rotation axis 3.
  • the drive takes place by means of a drive motor 6, in particular an electric motor, via a drive shaft 7, which can be formed by the motor shaft, and via a mechanical clutch or a transmission 8, expediently a motor speed to the smaller grinding disc speed reducing reduction gear, between the drive shaft. 7 and the output shaft 5.
  • the building ceiling 2 facing bottom 11 of the grinding plate 4 is a flat shape exhibiting abrasive 9, also called abrasive sheet, interchangeably attached.
  • abrasive 9 also called abrasive sheet
  • For detachable attachment of the abrasive 9 is expediently provided over the contact surface between the sanding pad 4 and abrasive 9 extending adhesive device in the form of a Velcro fastener.
  • the grinder 1a; 1b; 1c is held against the building ceiling 2 with the abrasive 9 fastened to the sanding pad 4, so that the abrasive 9 grips the building ceiling 2 in a sanding manner and carries out a material removal there.
  • a gap is drawn between the abrasive 9 and the building ceiling 2.
  • the abrasive 9 is applied to the building ceiling 2.
  • the gap was drawn only for the sake of clarity, in order to be able to indicate the existing despite the plant during operation air flow between the abrasive 9 and the building ceiling 2 by the arrows.
  • the sanding pad 4 has a suction recess 10 that is coaxial with the axis of rotation 3 and that is inserted into the sanding pad 4 from the sanding pad bottom 11.
  • the abrasive 9 includes a suction passage 10 corresponding passage opening 21, so that the Absaugausbloodung 10 remains uncovered.
  • the Absaugausbloodung 10 is covered by one of the sanding pad top 12 facing and the bottom of Absaugausbloodung 10 forming cover wall 13 of the sanding pad 4, which is formed by a sanding pad upper part 14 of rigid material over which the sanding pad 4 is connected to the output shaft 5 ,
  • the cover wall 13 includes a plurality of air passage openings 15, through which the Absaugausinstituung 10 is connected to a arranged above the sanding pad 4 space 16 in the housing of the grinder, which belongs to a first air passage 17.
  • the aspirated air contains dust particles that accumulate during grinding, so that it is dusty air.
  • the extracted dust air is therefore guided to a dust collector 22, which may be arranged on the grinder, in the simplest case, for example, a filter bag, or externally, in particular in a with the grinder via a suction hose 23 connectable vacuum cleaner 24 is arranged.
  • the vacuum cleaner could also be attached directly to the grinder.
  • the dust particles contained in the dust air are deposited on the dust collector 22. The air freed from the dust particles is blown into the environment.
  • the suction device can be formed by a suction blower 25 arranged downstream of the dust separator 22 in the flow direction ( FIGS. 1 . 3 . 5 and 6 ).
  • a suction blower 25 arranged downstream of the dust separator 22 in the flow direction ( FIGS. 1 . 3 . 5 and 6 ).
  • the suction fan 25 may be arranged on the drive shaft 7, a suction fan 26, which is associated with at least the first airway 17.
  • the suctioned air leading rooms, channels, etc., and the Sauggebläserad 26 are sealed so that no air leakage occur and the extracted air can not get to parts of the grinder, which are sensitive to dust. Accordingly, for example the space 16 into which the air passing through openings 15 of the sanding pad 4 passes air, be surrounded by a fixed neck portion 27 of the grinder housing, which is sealed by means of an example formed by a lip seal ring seal 28 against the rotating sanding pad 4. Furthermore, it can be seen from the drawing that the output shaft 5 extending through the space 16 is supported by means of a sealed bearing 29 which creates a seal of the space 16 at the point of entry of the output shaft 5 into the space 16.
  • Sauggebläserad 26 Since the Sauggebläserad 26 is disposed on the motor-side drive shaft 7, it rotates in the case of a arranged between the drive shaft 7 and the output shaft 5 reduction gear 8 at a higher speed than the sanding pad 4, so that you get a correspondingly high suction.
  • a plurality of air passage openings 15 are arranged distributed in a ring around the output shaft 5 around.
  • the AbsaugausNung 10 is enclosed by a ring portion 20 of the grinding plate 4.
  • the suction opening 10 facing inner peripheral wall 30 of the ring portion 20 is formed closed.
  • the ring portion 20 is connected in the axial direction on the one hand tight with the sanding pad upper part 14 and on the other hand, on its underside, the fastening means for securing the abrasive 9. In this way it is ensured that the suction 10 except at the bottom of the sanding pad and the air passage openings 15 is sealed as far as possible.
  • the abrasive 9 is in operation on the building ceiling 2, so that only little air from the environment in radial direction between the abrasive 9 and the building ceiling 2 passes through to Absaugausappelung 10. The air flow is shown symbolically by the arrows.
  • the lower side 11 of the sanding plate 4 forming underside of the ring portion 20 is formed closed, so there is an optimal pressure drop over the radius of the ring portion 20 away as far as possible.
  • the ring portion 20 extends radially outward to the outer periphery of the grinding plate 4, so that it forms its outer periphery.
  • the ring portion 20 further consists of elastically yielding material, in particular foam plastic.
  • the abrasive 9 is supported during operation on this ring section 20 on existing of rigid material sanding pad upper part 14. Due to the elastic yielding training the abrasive element 9 bearing ring section 20 nestles the abrasive 9 also on bumps in the building ceiling 2 at.
  • the suction force exerted on the grinder is proportional to the area of the suction recess 10. This should therefore be as large as possible if a large suction force is desired.
  • the illustrated Absaugausinstituung 10 therefore has in plan view of the sanding pad bottom 11 a circular disk-shaped shape, which is consistently open.
  • the sanding pad can also be formed without the suction recess 10.
  • the passage openings pass through the sanding pad from its top to its bottom.
  • Such a sanding pad has instead of the ring portion 20 a - from the passage openings - continuous sanding pad lower part of elastically yielding material, in particular foamed plastic, which is connected to the illustrated embodiments according to fixed with a sanding pad upper part of rigid material and at Loops on this supports. It is also important in this variant, not shown, that the underside of the sanding pad forms an air passage openings enclosing, closed trained annular surface, so that a corresponding effect as with the bottom of the ring section 20 results.
  • the abrasive has a hole pattern corresponding to the passage openings of the sanding plate.
  • the sanding pad 4 may be surrounded by a suction hood 32 having a larger diameter than the sanding pad 4, so that an annular circumferential gap 33 is formed between the outer circumference of the sanding pad 4 and the suction hood 32.
  • the suction hood 32 may, on its operation during operation, be gripped by the workpiece to be ground, i. the building ceiling 2 facing bottom a sealing brush ring 37 or the like, would be possible, for example, a flexible, circumferential sealing lip, have.
  • the brush ring 37 is in operation on the building ceiling 2 and causes a seal.
  • the gap 33 forms a suction gap, which is connected to a second air path 34, so that air can be sucked through the suction gap 33 and the second air path 34.
  • an adjustable between two positions Verstelleinrichung 35 is provided, which is assigned to either two airways 17, 34 ( Figures 1 and 2 ), so that in each of the two positions one of the airways is free and the other airway is shut off, or is assigned only to the second airway 34 ( FIGS. 3 to 6 ), so that in the two positions with free first airway 17 of the second airway 34 is free or shut off.
  • the grinder from the "suction” in which the grinder is sucked to the workpiece to be sanded be switched to a "normal operation” in which no or only a very small suction to the workpiece.
  • Normal operation is suitable, for example, for grinding vertical walls or floors.
  • a dust extraction, by the second airway 34 is also fed to the dust collector 22.
  • FIGS. 1 . 3 and 5 show the respective grinding device 1a; 1b; 1c in the operating mode "suction mode".
  • the respective device is shown in the operating mode "normal operation”.
  • the first airway 17 and the second airway 34 merge to form a common airway 36 leading to the dust collector 22.
  • the two air paths 17 and 34 can also be separated from each other to the dust separator 22, as in the grinding device 1c according to the FIGS. 5 and 6 the case is.
  • the adjusting device 35 is assigned to both airways 17 and 34, so that in the intake position corresponding to the position of the adjusting device 35, the first airway 17 is free and the second airway 34 is shut off ( FIG. 1 ), and in the position corresponding to the normal operation of the adjusting device 35, the first airway 17 is shut off and the second airway 34 is free ( FIG. 2 ).
  • the adjusting device 35 is in the region of the junction of the two air paths 17 and 34th
  • the adjusting device 35 is assigned only to the second air path 34, so that it is shut off (intake operation according to FIGS Figures 3 and 5 ) or free (normal operation according to the FIGS. 4 and 6 ).
  • the first air path 17 is independent from the position of the adjusting device 35 is always open, so that even in normal operation air flows through the first air passage 17. However, it is a relatively small amount of air, so that the suction effect practically eliminated.
  • the adjusting device is formed by a pivoting flap.
  • the adjustment could also be formed by a slide.
  • the arrangement may be such that in the first airway 17 shut-off position of the adjusting device 35 (FIG. FIG. 2 ) of the adjusting device 35 from the sanding pad 4 facing region of the first air path 17 is connected to the outside atmosphere.
  • the area 38 is connected to the outside atmosphere.
  • both the first air path 17, sitting on the drive shaft 6 Sauggebläserad 26 and the dust separator 22 downstream suction fan 25 is present.
  • the different air flows are each characterized by arrows.
  • suction hood 32 seen from the gap 33, is sealed to the grinder housing.

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)

Claims (11)

  1. Meuleuse portative actionnée par un moteur, comportant une meule, qui est entraînée en rotation autour d'un axe de rotation en cours de service et sur la face inférieure de laquelle, orientée vers la pièce à meuler, peut être fixé un moyen abrasif de forme plate, la meule étant munie d'orifices de passage d'air, de telle sorte que, au moyen d'un dispositif d'aspiration, l'air peut être aspiré depuis la face inférieure de la meule à travers les orifices de passage d'air et une trajectoire d'air dans le prolongement de ceux-ci, la meule (4) étant entourée par une cloche d'aspiration (32), ayant un diamètre supérieur à celui de la meule (4), de telle sorte qu'une fente d'aspiration (33) périphérique annulaire se forme entre le pourtour extérieur de la meule (4) et la cloche d'aspiration (32), caractérisée en ce que la fente d'aspiration (33) périphérique annulaire est reliée à une deuxième trajectoire d'air (34), de telle sorte que l'air peut être aspiré à travers la fente d'aspiration (33) et la deuxième trajectoire d'air (34), et en ce qu'il est prévu un dispositif de réglage (35) réglable entre deux positions, lequel est associé aux deux trajectoires d'air (17, 34), de telle sorte que dans chacune des deux positions, l'une des trajectoires d'air (17, 34) est libre et l'autre trajectoire d'air est fermée, ou est associé seulement à la deuxième trajectoire d'air (34), de telle sorte que dans les deux positions la deuxième trajectoire d'air (34) est libre ou fermée lorsque la première trajectoire d'air (17) est ouverte.
  2. Meuleuse portative selon la revendication 1, caractérisée en ce que, lorsque la première trajectoire d'air (17) est fermée, la zone de la première trajectoire d'air (17), orientée vers la meule (4) vue à partir du dispositif de réglage (35), est reliée à l'atmosphère extérieure.
  3. Meuleuse portative selon la revendication 1 ou 2, caractérisée en ce que la première trajectoire d'air (17) et la deuxième trajectoire d'air (34) se réunissent pour former une trajectoire d'air (36) commune au niveau du dispositif de réglage dans le cas où le dispositif de réglage est associé aux deux trajectoires d'air, et en aval du dispositif de réglage (35) par référence au sens d'aspiration dans le cas où le dispositif de réglage est seulement associé à la deuxième trajectoire d'air (34).
  4. Meuleuse portative selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le dispositif de réglage (35) est formé par un clapet pivotant.
  5. Meuleuse portative selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le dispositif de réglage est formé par un clapet coulissant.
  6. Meuleuse portative selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les orifices de passage d'air (15) sont disposés en cercle autour de l'axe de rotation (3).
  7. Meuleuse portative selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la face inférieure de la meule forme une surface annulaire fermée, entourant les orifices de passage d'air (15).
  8. Meuleuse portative selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la meule (4) comporte un évidement d'aspiration (10), qui est réalisé coaxialement à l'axe de rotation (3) et qui est ménagé dans la meule (4) à partir de la face inférieure (11) de la meule et est masqué par une paroi de recouvrement (13) munie des orifices de passage d'air (15) et orientée vers la face supérieure (12) de la meule, sachant que l'évidement d'aspiration (10) est entouré par une partie annulaire (20) de la meule (4), qui forme la face inférieure de la meule et dont la paroi périphérique intérieure (30), orientée vers l'évidement d'aspiration (10), est fermée et qui, dans la direction axiale, est reliée de manière étanche à une partie supérieure (14) de la meule formant la paroi de recouvrement (13).
  9. Meuleuse portative selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'évidement d'aspiration (10), sur une vue en élévation sur la face inférieure (11) de la meule, a une configuration en forme de disque circulaire.
  10. Meuleuse portative selon l'une quelconque des revendications 1 à 9, caractérisée en ce qu'elle comporte un arbre d'entraînement (7) du côté moteur et un arbre mené (5) du côté meule, actionné par ledit arbre d'entraînement par l'intermédiaire d'un démultiplicateur (8), et en ce qu'une roue (26) de ventilateur d'aspiration, associée au moins à la première trajectoire d'air (17), est montée sur l'arbre d'entraînement (6).
  11. Meuleuse portative selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'elle est réalisée sous la forme d'une meuleuse pour plafond.
EP20060024164 2006-11-22 2006-11-22 Meuleuse portative à moteur avec mécanisme d'aspiration réglable Active EP1925401B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20060024164 EP1925401B1 (fr) 2006-11-22 2006-11-22 Meuleuse portative à moteur avec mécanisme d'aspiration réglable
DE200650002614 DE502006002614D1 (de) 2006-11-22 2006-11-22 Motorgetriebenes Handschleifgerät mit verstellbarer Absaugeinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060024164 EP1925401B1 (fr) 2006-11-22 2006-11-22 Meuleuse portative à moteur avec mécanisme d'aspiration réglable

Publications (2)

Publication Number Publication Date
EP1925401A1 EP1925401A1 (fr) 2008-05-28
EP1925401B1 true EP1925401B1 (fr) 2009-01-07

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Application Number Title Priority Date Filing Date
EP20060024164 Active EP1925401B1 (fr) 2006-11-22 2006-11-22 Meuleuse portative à moteur avec mécanisme d'aspiration réglable

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Country Link
EP (1) EP1925401B1 (fr)
DE (1) DE502006002614D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112643428A (zh) * 2020-12-15 2021-04-13 湖南运达装饰工程有限公司 一种平整度高的装修无尘打磨机
EP3793771B1 (fr) * 2018-05-16 2025-02-19 Festool GmbH Machine-outil mobile à équipement d'aspiration et procédé de commande

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054811B4 (de) * 2009-12-17 2021-06-17 Robert Bosch Gmbh Handwerkzeugmaschine
DE102011076627A1 (de) 2011-05-27 2012-11-29 Robert Bosch Gmbh Motorgetriebenes Handschleifgerät
DE202015100403U1 (de) 2015-01-27 2015-03-18 Polirtlak D.O.O. Schleifstaub-Absaugvorrichtung
DE202015009462U1 (de) * 2015-01-27 2017-09-18 Polirtlak D.O.O. Fahrbare Bodenschleifmaschine und Nachrüstsatz für einen Flügelglätter
GB2554388B8 (en) 2016-09-23 2019-07-17 Motorscrubber Ltd Surface treatment tool
CN108814438B (zh) * 2018-06-25 2020-10-27 周盈裕 一种基于高位空间下的建筑房间清理工具
CN113910033A (zh) * 2021-10-14 2022-01-11 江苏亿亿建设集团有限公司 一种建筑装饰用打磨装置
CN120921211B (zh) * 2025-10-13 2025-12-23 湘潭鑫华特种钢制造有限公司 一种不锈钢铸件生产用打磨装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9801527D0 (en) * 1998-01-23 1998-03-25 Numatic Int Ltd Attachment for a floor maintenance machine
DE19829190B4 (de) * 1998-06-30 2006-12-21 Robert Bosch Gmbh Handschleifmaschine
US5993305A (en) * 1998-10-31 1999-11-30 Chu; Eric Air-drafting dust remover for power sander
DE10329828B4 (de) * 2003-06-27 2009-06-18 Festool Gmbh Handwerkzeugmaschine mit Kühlvorrichtung und Staubabsaugung
DE202005011659U1 (de) * 2005-07-20 2005-11-10 Kammerer, Rolf Schleifgerät für Bauhandwerker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3793771B1 (fr) * 2018-05-16 2025-02-19 Festool GmbH Machine-outil mobile à équipement d'aspiration et procédé de commande
CN112643428A (zh) * 2020-12-15 2021-04-13 湖南运达装饰工程有限公司 一种平整度高的装修无尘打磨机

Also Published As

Publication number Publication date
EP1925401A1 (fr) 2008-05-28
DE502006002614D1 (de) 2009-02-26

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