EP0526844B1 - Appareil pour meuler - Google Patents

Appareil pour meuler Download PDF

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Publication number
EP0526844B1
EP0526844B1 EP92113053A EP92113053A EP0526844B1 EP 0526844 B1 EP0526844 B1 EP 0526844B1 EP 92113053 A EP92113053 A EP 92113053A EP 92113053 A EP92113053 A EP 92113053A EP 0526844 B1 EP0526844 B1 EP 0526844B1
Authority
EP
European Patent Office
Prior art keywords
grinding
suction
grinding tool
suction chamber
connection piece
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
EP92113053A
Other languages
German (de)
English (en)
Other versions
EP0526844A3 (en
EP0526844A2 (fr
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP0526844A2 publication Critical patent/EP0526844A2/fr
Publication of EP0526844A3 publication Critical patent/EP0526844A3/de
Application granted granted Critical
Publication of EP0526844B1 publication Critical patent/EP0526844B1/fr
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
    • 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
    • B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor

Definitions

  • the invention relates to a grinding device with a swivel shaft for the oscillating drive of a grinding tool about a device-fixed swivel axis, the grinding tool having a grinding surface with a triangular basic shape and with side surfaces, delimited by the corner regions, with a suction hood that can be fixed in place with a suction nozzle for suction of grinding dust is, which surrounds the grinding tool from above and at least partially laterally, and wherein the suction hood has a suction chamber into which the suction nozzle opens laterally.
  • Such a grinder is known from DE-A-37 24 747.
  • a plurality of suction openings are provided in the grinding surface, through which dust arising on the grinding surface can be suctioned off via a suction hood attached.
  • grinding devices of this type are only of limited suitability for fine machining of surfaces, in particular if they are made of relatively soft material, such as Acrylic glass, or made of very hard material, e.g. Rock, exist. Even with very careful work, the finest surface scratches cannot be avoided when grinding such materials using dry grinding.
  • a suction hood for a grinding device is also known, which can be placed on the grinding device from above, the suction hood covering the grinding device completely and projecting far at the edges.
  • an orbital sander has also become known, in which a suction hood is provided which surrounds the grinding tool from above and at least partially on the side, and wherein the suction hood has a suction chamber into which the suction nozzle opens laterally. Furthermore, the grinding surface is designed as a closed surface not penetrated by openings.
  • the present invention is accordingly based on the object of providing a grinding device in which the risk of scoring during grinding is reduced and at the same time a good suction effect is ensured.
  • this object is achieved in that, in a grinding device of the type mentioned at the outset, the grinding surface is designed as a closed surface which is not penetrated by openings, in that the suction hood overlaps the side surfaces of the grinding tool and in that the cross section of the suction chamber - viewed in the direction of the pivot axis - tapered from the extraction nozzle to the opposite corner area.
  • the grinding surface is thus designed as a closed surface.
  • the fact that no openings are provided in the grinding surface eliminates the problems which arise in conventional grinding devices at the edges of the suction openings. In this way, protrusions on the edges of suction openings are avoided, which can occur in conventional grinding devices due to greater mechanical stress in the vicinity of suction openings. At the same time, fraying of the grinding surface in the vicinity of suction openings is avoided and a uniform surface treatment is made possible.
  • the suction hood overlaps the side surfaces of the grinding tool, and the cross section of the suction chamber - viewed in the direction of the swivel axis, tapers from the suction nozzle to the opposite corner area.
  • the suction hood only encloses the grinder on the side at a small distance, the freedom of movement when machining edge and corner areas is hardly restricted.
  • the cross section of the suction chamber tapers from the suction nozzle to the opposite side of the grinding tool.
  • the suction chamber has a heart-shaped shape, the tip of the heart shape being assigned to the corner region of the grinding surface and the suction nozzle opening into the suction chamber opposite the tip.
  • the heart-shaped shape of the suction chamber enables a particularly favorable adaptation to the flow conditions. This avoids flow losses and, in connection with the reduction in cross-section in the suction chamber from the suction nozzle to the opposite corner area, achieves a uniform suction effect both at the distant corner area opposite the suction nozzle and at the two lateral corner areas which are closer to the suction nozzle.
  • the suction hood has a central receptacle for attachment to the drive housing, through which the pivot shaft is passed.
  • This version ensures that the suction hood is easily attached to the drive housing.
  • the receiving connector has an extension which projects into the suction chamber and which is sealed against the grinding tool.
  • the suction nozzle has an approximately kidney-shaped cross section with a lower, slightly convex outwardly curved side wall facing the grinding tool, which is assigned an upper, slightly concave outwardly curved side wall.
  • This shape of the suction nozzle enables the lowest possible flow resistance at the point where the suction nozzle opens into the heart-shaped suction channel, in the middle of which the extension of the receiving nozzle is arranged.
  • the suction hood is made of plastic. In this way, simple manufacture by injection molding and low weight are ensured.
  • a grinding device is generally designated by the number 10.
  • a swivel shaft 24 for the oscillating drive of a grinding tool 12 about a swivel axis 14 fixed to the device is arranged in a drive housing 30.
  • the structure and mode of operation of the drive corresponds entirely to the grinding device known from EP 0 244 465 B1.
  • the grinding tool 12 which has a triangular grinding surface 16, is fastened to the free end of the pivot shaft 24.
  • the grinding tool 12 is enclosed by a suction hood, which is designated overall by the number 20.
  • the suction hood 20 has a central receptacle 26, which is slightly tapered on the outside and continues inside the suction hood 20 with a cylindrical extension 38 to the grinding tool 12.
  • the receiving connector 26 is placed on the flange-shaped end of the drive housing 30 and can additionally be fastened thereon, for example, by means of a clamping ring.
  • a sealing ring 39 is embedded in the end face of the extension 38 and bears sealingly on the rear side 32 of the grinding tool 12 facing away from the grinding surface 16.
  • the suction hood 20 is adapted in its outer shape to the triangular shape of the grinding tool 12.
  • the suction hood 20 has three side faces 27, which are arranged symmetrically to the receiving connector 26 and are slightly convex on the outside, which cover the grinding tool 12 on its side faces 34 from the outside and are set back with their end faces 25 by a small distance from the grinding face 16, so that a small gap between a processing surface 44, over which the grinding tool 12 is guided, and the end faces 25 is formed.
  • the three side surfaces 27 of the suction hood are connected to one another by flattened corners 29.
  • the distance between the side surfaces 27 of the suction hood and the side surfaces 34 of the grinding tool 12 is selected such that the grinding tool can be pivoted about the pivot axis 14 by a small pivoting angle of up to approximately 7 ° with a high frequency up to approximately 25,000 vibrations per minute, without the grinding tool 12 touching the side surfaces 27 of the suction hood 20.
  • the side surfaces 27 and the corners 29 of the hood 20 are delimited by a hood cover 31 which extends approximately parallel to the rear side 32 of the grinding tool 12, but is slightly curved toward the central extension 38.
  • the distance between the hood cover 31 and the back 32 of the grinding tool 12 is only a few millimeters.
  • a suction chamber 28 is let into the hood ceiling 31, which extends from a suction nozzle 22 that opens laterally between two corners 29 of the suction hood 20 to the opposite corner 29.
  • the suction chamber 28 has in accordance with the bottom view.
  • Fig. 3 shows a heart shape, with the tip 36 of the heart shape ending directly at the corner 29 of the suction hood.
  • the suction chamber 28 surrounds the central extension 38 symmetrically on both sides and, with its wide end opposite in the tip 36, merges directly into the suction nozzle 22 via an opening 23.
  • the cross section of the suction chamber 28 is tapered from the opening 23 to its opposite tip 36. This is achieved in that the distance h between the hood ceiling 31 and the top of the suction chamber 28 decreases continuously from the side of the suction nozzle 22 to the tip 36. At its tip 36, the suction chamber 28 runs out of the hood ceiling 31.
  • the cross section of the suction nozzle 22 can be seen from FIG. 4.
  • the suction nozzle 22 is approximately kidney-shaped in cross section with a lower, slightly convex outwardly curved side wall 40 facing the grinding tool 12, to which an upper, slightly concave outwardly curved side wall 42 is assigned.
  • the two approximately parallel side walls 40, 42 merge into one another in the edge region via curved sections 43.
  • a plug-in part 21 can be inserted, the cross section of which is matched to the suction nozzle 22, so that there is a largely airtight connection.
  • the plug is in a manner not shown guided parallel to the drive housing 30, can additionally gem.
  • DE 37 24 747 A 1 mentioned at the beginning can be held on the drive housing 30 via a bracket or with a Velcro strap and is connected to a suction device via a suction hose.

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 (6)

  1. Meuleuse avec un arbre pivotant (24), destiné à assurer un entraînement oscillant d'un outil de meulage (12) autour d'un axe de pivotement (14) fixe par rapport à l'appareil, l'outil de meulage (12) présentant une face de meulage (16) à forme de base triangulaire et avec des faces latérales (34), au moyen desquelles sont délimitées des zones d'angle (18), un capot d'aspiration (20) pouvant être bloqué, en position fixe par rapport à l'appareil, étant prévu avec une tubulure d'aspiration (22) destinée à l'évacuation par aspiration de la poussière de meulage et le capot d'aspiration entourant l'outil de meulage (12) par le haut et au moins partiellement latéralement, et le capot d'aspiration (20) présentant une chambre d'aspiration (28) dans laquelle la tubulure d'aspiration (22) débouche latéralement, caractérisée en ce que la surface de meulage (16) est réalisée sous forme de surface fermée, non traversée par des ouvertures, en ce que le capot d'aspiration (20) entoure les surfaces latérales (34) de l'outil de meulage (12) et en ce que - en observant dans la direction de l'axe de pivotement (14) - la section transversale de la chambre d'aspiration (28) va en s'effilant, en allant de la tubulure d'aspiration (22) à la zone d'angle (18) opposée.
  2. Meuleuse selon la revendication 1, caractérisée en ce que la chambre d'aspiration (28) est en forme de coeur, la pointe (36) de la forme en coeur étant associée à une zone d'angle (18) de la face de meulage (16) et la tubulure d'aspiration (22) débouchant dans la chambre d'aspiration (28) à l'opposé de la pointe (36).
  3. Meuleuse selon l'une des revendications précédentes, caractérisée en ce que le capot d'aspiration (20) présente une tubulure de montage (26) centrale, pour assurer la fixation sur le carter d'entraînement (30), tubulure à travers laquelle est guidé l'arbre pivotant (24).
  4. Meuleuse selon la revendication 3, caractérisée en ce que la tubulure de montage (26) présente un prolongement (38) pénétrant dans la chambre d'aspiration (28) et isolé de façon étanche vis-à-vis de l'outil de meulage (12).
  5. Meuleuse selon l'une des revendications précédentes, caractérisée en ce que la tubulure d'aspiration (22) présente une section transversale sensiblement en haricot, avec une paroi latérale (40) inférieure bombée de façon légèrement convexe vers l'extérieur, tournée vers l'outil de meulage (12), à laquelle est associée une paroi latérale supérieure (42), bombée de façon légèrement concave vers l'extérieur.
  6. Meuleuse selon l'une des revendications précédentes, caractérisée en ce que le capot d'aspiration (20) est en matière plastique.
EP92113053A 1991-08-03 1992-07-31 Appareil pour meuler Expired - Lifetime EP0526844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4125796 1991-08-03
DE4125796A DE4125796C1 (fr) 1991-08-03 1991-08-03

Publications (3)

Publication Number Publication Date
EP0526844A2 EP0526844A2 (fr) 1993-02-10
EP0526844A3 EP0526844A3 (en) 1993-04-07
EP0526844B1 true EP0526844B1 (fr) 1995-01-25

Family

ID=6437662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113053A Expired - Lifetime EP0526844B1 (fr) 1991-08-03 1992-07-31 Appareil pour meuler

Country Status (6)

Country Link
US (1) US5319889A (fr)
EP (1) EP0526844B1 (fr)
JP (1) JP2639769B2 (fr)
CA (1) CA2075079A1 (fr)
DE (2) DE4125796C1 (fr)
ES (1) ES2068657T3 (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1258820B (it) * 1992-01-24 1996-02-29 Giuseppe Catalfamo Carteggiatrice a disco con mezzi di aspirazione delle polveri incorporati
JP2829224B2 (ja) * 1992-08-14 1998-11-25 リョービ モーター プロダクツ コーポレーション 研磨装置
US5533926A (en) * 1992-09-04 1996-07-09 Ryobi North America Sandpaper pad and pad support for a detail sander
JPH0663284U (ja) * 1993-02-05 1994-09-06 リョービ株式会社 動力工具の駆動部構造
DE9309965U1 (de) * 1993-07-05 1994-11-03 Robert Bosch Gmbh, 70469 Stuttgart Handwerkzeugmaschine zur Flächenbearbeitung
US5637034A (en) * 1993-08-13 1997-06-10 Ryobi North America, Inc. Detail sander
US5607343A (en) * 1994-08-22 1997-03-04 Ryobi North America Sander vibration isolator
US5833524A (en) * 1994-08-22 1998-11-10 Ryobi Limited Dust collection system for a power tool
EP0726121A3 (fr) * 1995-02-09 1996-10-02 Porter Cable Corp Système de ponçage linéaire
US5743791A (en) * 1995-02-09 1998-04-28 Porter Cable Corporation Sanding system
US5554066A (en) * 1995-02-09 1996-09-10 Proter-Cable Corporation In-line profile sander
US5759094A (en) * 1995-02-09 1998-06-02 Porter-Cable Corporation In-line detail sander
US5558569A (en) * 1995-04-12 1996-09-24 Lee; Tai-Wang Grinding head mounting structure for portable grinding machines
DE19617477A1 (de) * 1996-05-02 1997-11-06 Bosch Gmbh Robert Elektrische Handschleifmaschine
CH695141A5 (de) * 2001-03-05 2005-12-30 Lux Asia Pacific Pte Ltd The L Flächenbearbeitungsvorrichtung zur Verwendung mit einem Absauggerät.
CA2529354A1 (fr) * 2005-12-08 2007-06-08 Luigi Panfili Dispositif de poncage, systeme ainsi equipe, et methode d'utilisation associee
DE102005062887A1 (de) * 2005-12-29 2007-07-05 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Turbineneinheit
US7635293B2 (en) * 2008-02-26 2009-12-22 Storm Pneumtic Tool Co., Ltd. Grinding machine with a length-adjustable dust collecting structure
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
KR101324158B1 (ko) * 2013-04-04 2013-11-05 정석건설산업 주식회사 친환경 분진방지 그라인더 및 이를 이용한 친환경 표면처리 방법
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
CA2822631A1 (fr) 2013-08-01 2015-02-01 A. Richard Tools Co./Outils A. Richard Co. Dispositif de poncage et ensemble de poncage le comprenant
US9387578B2 (en) * 2013-10-28 2016-07-12 Black & Decker Inc. Handle arrangement for sander
US9475172B2 (en) 2014-07-15 2016-10-25 Milwaukee Electric Tool Corporation Adjustable guard for power tool
USD744800S1 (en) 2014-07-16 2015-12-08 Milwaukee Electric Tool Corporation Power tool blade guard
US10906108B2 (en) * 2018-04-24 2021-02-02 Robert Bosch Tool Corporation Blade accessory with guide
US11123839B2 (en) 2018-10-23 2021-09-21 Dustless Depot Llc Grinder dust shroud with input shaft gasket and adjustable mounting mechanism
US11273505B2 (en) 2019-03-27 2022-03-15 Dustless Depot, Llc Circular saw dust collection shroud

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Publication number Priority date Publication date Assignee Title
US2929177A (en) * 1958-05-12 1960-03-22 Black & Decker Mfg Co Sanding apparatus
DE6933862U (de) * 1969-08-27 1970-01-02 Siegfried Mix Vorrichtung zum absaugen des schleifstaubes bei vorsatzschwingschleifgeraeten
US3722147A (en) * 1971-08-16 1973-03-27 L Brenner Air driven abrading device
US3938283A (en) * 1975-02-24 1976-02-17 The Singer Company Dust bag support
SE403445B (sv) * 1975-10-16 1978-08-21 Nederman Bill P Ph Anordning vid partikelsugsystem avsedda att bortsuga partiklar, som bildas vid arbete med tryckluftdrivna arbetsmaskiner for spanavskiljande bearbetning, varvid arbetsmaskinens bearbetningshastighet regleras genom ...
US4071981A (en) * 1976-12-03 1978-02-07 Champayne Roy J Portable abrading machine with dust collecting system
US4296572A (en) * 1978-03-17 1981-10-27 Pedro Quintana Dust removing attachment device for automatic air files
DE8523993U1 (de) * 1985-08-21 1985-11-07 Paul Peter KG, 5900 Siegen Schutz- und Absaugabdeckung
DE3664740D1 (en) * 1985-11-15 1989-09-07 Fein C & E Portable grinder
DE3724747A1 (de) * 1987-07-25 1989-02-02 Fein C & E Schleifgeraet mit staubabsaugeinrichtung
JPH0248218Y2 (fr) * 1987-11-11 1990-12-18
DE3744219A1 (de) * 1987-12-24 1989-07-06 Fein C & E Handschleifmaschine mit verstellbarer schutzhaube
US5125190A (en) * 1990-05-16 1992-06-30 Buser John P Dust collector and shield for rotary grinder

Also Published As

Publication number Publication date
EP0526844A3 (en) 1993-04-07
ES2068657T3 (es) 1995-04-16
CA2075079A1 (fr) 1993-02-04
US5319889A (en) 1994-06-14
DE59201270D1 (de) 1995-03-09
EP0526844A2 (fr) 1993-02-10
JP2639769B2 (ja) 1997-08-13
JPH07100766A (ja) 1995-04-18
DE4125796C1 (fr) 1992-12-24

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