EP0424720B1 - Vorsatzgerät für einen Winkelschleifer - Google Patents

Vorsatzgerät für einen Winkelschleifer Download PDF

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Publication number
EP0424720B1
EP0424720B1 EP90119281A EP90119281A EP0424720B1 EP 0424720 B1 EP0424720 B1 EP 0424720B1 EP 90119281 A EP90119281 A EP 90119281A EP 90119281 A EP90119281 A EP 90119281A EP 0424720 B1 EP0424720 B1 EP 0424720B1
Authority
EP
European Patent Office
Prior art keywords
attachment
tool
angle
holder
bracket
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
EP90119281A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0424720A1 (de
Inventor
Robert Wolff
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.)
Wolfcraft GmbH
Original Assignee
Wolfcraft 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 Wolfcraft GmbH filed Critical Wolfcraft GmbH
Priority to AT90119281T priority Critical patent/ATE91451T1/de
Publication of EP0424720A1 publication Critical patent/EP0424720A1/de
Application granted granted Critical
Publication of EP0424720B1 publication Critical patent/EP0424720B1/de
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
    • 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
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • 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
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • 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
    • B24B23/028—Angle tools

Definitions

  • the invention relates to an attachment for an angle grinder, with an eccentric head which can be screwed onto its output spindle and which acts on a tool carrier via an eccentrically arranged ball bearing, the freedom of movement of which, by means of a flexible linkage device attached to the housing of the angle grinder, to a reciprocating movement in accordance with the eccentricity and is limited to an overlapping pivoting movement around the flexible point of the articulation device.
  • the AEG company has been selling the SS 707 and SS 717 orbital sander types since 1978, in which the tool carrier, which has an eccentric ball bearing, is flexibly articulated by four cylindrical rubber buffers arranged in a rectangle to parts rigidly connected to the drive machine housing in such a way that a rotational movement of the tool carrier is prevented and this only performs a small oscillating circuit movement according to the eccentricity of the ball bearing.
  • These known orbital sanders are designed as attachments for manual drive machines (see catalog AEG DIY system, February 1978). However, they are not suitable for grinding surfaces along edges or in narrow corner areas.
  • the output spindle is provided with an eccentric, which acts via an eccentrically arranged ball bearing on a strip-shaped tool carrier, the freedom of movement by a bolt attached to the grinder housing, which engages in an elongated hole of the strip-shaped tool carrier , is limited to a to-and-fro movement in the longitudinal direction of the ledge and to an overlapping pivoting movement around the bolt, so that the tool carrier describes an elliptical trajectory at its front free end.
  • the tool carrier carries there a rectangular sanding pad at its front free end.
  • this known angle hand grinder is also suitable for sanding and fine sanding on longitudinal edges and in corners.
  • the elliptical, circular movement of the individual abrasive grain enables a very fine sanding, the sanding sheet being worn there almost uniformly over the entire surface.
  • this known device must be purchased as a single device, since its eccentric head and the tool carrier linkage are integrated into the basic device and are therefore not designed as an attachment.
  • the invention has for its object to provide a generic attachment for angle grinders in such a way that it can be used for all types of angle grinders available on the market and allows inexpensive production of a set of different tool carriers.
  • the outer ring of the ball bearing is arranged eccentrically in the rotating eccentric head and a central internal threaded bushing is fastened in the inner ring
  • the articulation device consists of a tab that can be screwed onto a handle screw hole of the angle grinder and that is flexibly connected to the tab , at the lower end of the threaded bushing, radially projecting cantilever part and that the tool carrier is a structurally separate from the articulation device and the eccentric, which is interchangeable.
  • the invention provides a number of advantages.
  • the attachment can be attached to almost all commercially available angle hand grinders via the screw-on bracket, since on the one hand the thread of the output spindle of such devices is standardized and the threaded holes on the head of the known angle grinder on both sides for screwing on additional handles are used for the flexible articulation in the invention. There are therefore no longer any special adapter pieces to be attached to the head of the angle grinder.
  • a further decisive advantage is that when the tool holder is changed, the eccentric head including the ball bearing and also the flexible linkage device remain on the angle grinder and therefore only the tool holder - for example when worn against a new one - or against another type of tool holder must be replaced.
  • Such a grinding plate largely combines the advantages of an arched triangular grinding plate with those of a grinding plate protruding in the form of a finger.
  • the cantilever part can consist of a cup which largely encloses the eccentric head and which protrudes toward the tab and which can be clamped together with the tool carrier by means of a single cap screw on the internally threaded bushing.
  • Fig. 1 shows an angle grinder 1
  • the output spindle 2 is provided with a standardized thread and has two threaded holes 3, 4 provided on both sides of the angle grinder head for optionally screwing on additional handles.
  • the attachment consists of an eccentric head 5 which can be screwed onto the output spindle 2 by means of a threaded bore 6 and rotates with the latter.
  • the eccentric head 5 carries in an eccentric receptacle 8 with respect to the axis 7 of the threaded bore 6 the outer ring 9 of a deep groove ball bearing 10, on the inner ring 11 of which an internally threaded bushing 12 is clamped by means of a cap screw 13 screwed into the internally threaded bushing 12 from above.
  • the outer ring 9 of the ball bearing is clamped to the eccentric head 5 by a plurality of pan head screws 14 distributed over the circumference.
  • the tool carrier 16, which is designed as a grinding plate, can be connected to the eccentric ball bearing 10 by means of a cap screw 15 inserted into the internally threaded bushing 12 from below.
  • the attachment is provided with a flexible articulation device 17, which is only shown schematically in FIG. 1 and in constructive detail in FIGS. 2 to 4.
  • the articulation device 17 comprises a cantilever part 18 which can be clamped directly onto the end face of the internally threaded bushing 12 and between whose radially projecting projection 19 and a tab 20 an elastic rubber buffer 21 is clamped.
  • the tab 20 is directed approximately perpendicular to the tool carrier 16 and is provided with an elongated hole 22 and is fastened by means of a cap screw to the screw hole 4 lying rearward in FIG. 1.
  • a group of different cap screws 23 with washers 24 is assigned to the attachment.
  • the cantilever part 18 of the flexible articulation device 17 consists of a cup 25, which largely encloses the eccentric head 5, on the inner bottom of which a hexagon receptacle 26 is attached for the lower end of the threaded bushing 12 designed as a congruent hexagon head 27.
  • the radially protruding projection 19 which is directed towards the rear during assembly of the attachment, ie under the angle grinder 1, and which has a clamping surface 28 perpendicular to the tool carrier 16, on which the rubber buffer 21 by means of it penetrating head screw 29 is tightened such that the axis of the cylindrical rubber buffer 21 is directed parallel to the tool carrier 16 and at the same time parallel to the transverse central plane of the attachment.
  • the transverse component of the circular movement path 30 is, however, suppressed by the rubber buffer 21 at the rear end of the tool carrier 16, so that the back and forth movement of the grinding plate overlaps a pivoting movement around the articulation point 33 and the grinding plate in its front region 34 has an elliptical movement path 35 executes, which is, however, shown greatly enlarged in Fig. 5. Due to the swiveling movement, the rubber buffer is minimally loaded for compression or expansion, which is indicated by the short arrows on the front side S of the buffer. The buffer is not subjected torsion.
  • the tool carrier or grinding plate 16 shown which has the shape of an elongated hexagon and in which the screwing point 36 is offset on the longitudinal axis L next to the center M of the grinding plate, there is an eccentricity of 0.5 millimeters in the front region 34 of the grinding plate an elliptical trajectory, the short axis is 1 millimeter and the long axis is about 2 to 3 millimeters.
  • the hexagonal tool carrier 16 has at its two opposite ends in the longitudinal axis L each at a right angle R, so that with such a grinding tool optimally along the edge and in the corner of a workpiece 37, which is, for example, a drawer acts, can be worked.
  • the grinding plate is provided on both sides of its longitudinal center M with screw-through openings 38, so that when the front area 34 wears out, the tool carrier can be converted into a position turned through 180 ° and screwed on again.
  • the tab 40 here has at its lower, forwardly bent end a downwardly directed bolt 41 which engages in a horizontal elongated hole 42 in the shoulder 43 of the cantilever part 44.
  • the elongated hole 42 has a width equal to the diameter of the bolt 41, so that the bolt 41 acts as a hinge axis.
  • the length of the elongated hole 42 should be significantly greater than the sum of the diameter of the bolt 41 and the stroke length according to the double arrow 31, for example 20 millimeters, since this facilitates the adaptation of the attachment to the respective angle grinder devices.
  • the articulation device 45 consists of an approximately parallel to the plane of the tool carrier 16 Connecting member 46 which is pivotally mounted on the cantilever 47 and the tab 20 about axes perpendicular to the plane of the tool carrier.
  • Connecting member 46 which is pivotally mounted on the cantilever 47 and the tab 20 about axes perpendicular to the plane of the tool carrier.
  • a hinge sleeve 48 is screwed onto the tab 20 and a sleeve 49 is inserted into the collar part 47.
  • the articulation axes 50, 51 are here made in one piece with the connecting member 46 consisting of round material, which thus has an overall U-shape.
  • ball bearings can also be provided to reduce the bearing friction.
  • the invention is not restricted to the exemplary embodiments shown. Rather, the tool attachment can be assigned different tool carriers with tools for grinding, polishing, corner grinding, scraping or slitting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Golf Clubs (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Liquid Crystal Substances (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP90119281A 1989-10-23 1990-10-08 Vorsatzgerät für einen Winkelschleifer Expired - Lifetime EP0424720B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90119281T ATE91451T1 (de) 1989-10-23 1990-10-08 Vorsatzgeraet fuer einen winkelschleifer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935179A DE3935179A1 (de) 1989-10-23 1989-10-23 Vorsatzgeraet fuer einen winkelschleifer
DE3935179 1989-10-23

Publications (2)

Publication Number Publication Date
EP0424720A1 EP0424720A1 (de) 1991-05-02
EP0424720B1 true EP0424720B1 (de) 1993-07-14

Family

ID=6391972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119281A Expired - Lifetime EP0424720B1 (de) 1989-10-23 1990-10-08 Vorsatzgerät für einen Winkelschleifer

Country Status (7)

Country Link
US (1) US5056268A (da)
EP (1) EP0424720B1 (da)
AT (1) ATE91451T1 (da)
CA (1) CA2022421A1 (da)
DE (2) DE3935179A1 (da)
DK (1) DK0424720T3 (da)
ES (1) ES2044363T3 (da)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118392B4 (de) * 1991-06-05 2010-03-18 Robert Bosch Gmbh Exzenterschleifer
DE4125795C1 (da) * 1991-08-03 1993-02-11 C. & E. Fein Gmbh & Co, 7000 Stuttgart, De
GB9415011D0 (en) * 1994-07-26 1994-09-14 Black & Decker Inc Improved oscillating hand tool
US5759094A (en) 1995-02-09 1998-06-02 Porter-Cable Corporation In-line detail sander
US5743791A (en) * 1995-02-09 1998-04-28 Porter Cable Corporation Sanding system
JPH08309654A (ja) * 1995-05-16 1996-11-26 Ryobi Ltd サンディング工具
DE19617474A1 (de) * 1996-05-02 1997-11-06 Bosch Gmbh Robert Schwingschleifer
US5784789A (en) * 1996-09-18 1998-07-28 Vargas; Joseph J. Rotary trim saw
EP0898051A1 (de) * 1997-08-18 1999-02-24 Bechem, Hannelore Kombination konventioneller Schlitzwerkzeuge mit exzenteraktivierten Fräsbohrwerkzeugen
JP3006591B2 (ja) * 1998-07-02 2000-02-07 信濃電気製錬株式会社 ロール研磨用多孔質砥石及びロール表面の研磨方法
US7780506B2 (en) * 2002-08-05 2010-08-24 Brad R. Wettstein Sanding block
US20080020688A1 (en) * 2003-05-16 2008-01-24 Annis Kent V Tool for working on a surface
US20070184765A1 (en) * 2003-05-16 2007-08-09 Annis Kent V Tool for working on a surface
US6991529B2 (en) * 2003-05-16 2006-01-31 Full Circle International, Inc Hand manipulated tool
US8137370B2 (en) * 2005-11-02 2012-03-20 Stryker Corporation Powered surgical handpiece with improved latch mechanism and rotary to oscillating output drive
CA2529354A1 (en) * 2005-12-08 2007-06-08 Luigi Panfili Sanding device, system including the same, and method of operating associated thereto
WO2007103487A1 (en) * 2006-03-09 2007-09-13 Full Circle International, Inc. Tool for working on a surface
US7717771B1 (en) * 2006-06-30 2010-05-18 Lyerly Dennis J Angle grinder and angle grinder spindle-collet adaptor
USD567053S1 (en) 2006-09-26 2008-04-22 A. Richard S.E.N.C. Sanding device
GB2443199B (en) * 2006-10-27 2008-12-31 David Vincent Byrne A chaser comprising a universal connection means
US7927192B2 (en) * 2007-10-17 2011-04-19 Full Circle International, Inc Tool for working on a surface
US8690637B2 (en) * 2008-12-08 2014-04-08 Toyota Motor Engineering & Manufacturing North America, Inc. Flex-arm devices and methods
EP2404701B1 (en) * 2010-07-05 2013-05-29 Techtronic Power Tools Technology Limited Sander
US8499674B2 (en) 2010-09-22 2013-08-06 Robert Bosch Gmbh Yoke accessory tool for an oscillating tool
DE102010043182A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Tragbare Werkzeugmaschine
US9662800B2 (en) 2011-01-18 2017-05-30 Husqvarna Ab Cutting and dust or slurry collecting assembly and working machine
EP2736675B1 (en) * 2011-07-26 2020-09-23 3M Innovative Properties Company Modular dual-action device
CN102528609B (zh) * 2011-12-30 2014-06-18 中国科学院长春光学精密机械与物理研究所 一种振动抛光磨头
CA2822631A1 (en) 2013-08-01 2015-02-01 A. Richard Tools Co./Outils A. Richard Co. Sanding device, and sanding assembly including the same
CN108000096B (zh) * 2017-12-20 2023-05-09 长安大学 角磨机头壳自动轴承安装机
CN117102999B (zh) * 2023-09-05 2024-04-09 无锡市昌亿机床制造有限公司 一种附带自动对刀卡盘工装的加工设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350098A (en) * 1941-12-31 1944-05-30 Black & Decker Mfg Co Oscillating sander
US2332613A (en) * 1942-04-23 1943-10-26 Lewis R Swank Sander attachment
US2614369A (en) * 1947-07-26 1952-10-21 Fast Inc Du Sanding or rubbing attachment
CH591930A5 (en) * 1976-02-03 1977-10-14 Univlex Ag Polishing disc drive adaptor - has one end eccentrically mounted on intermediate part to give eccentric disc rotation
DE2745129A1 (de) * 1977-10-07 1979-04-12 Miksa Marton Exzenterkopf fuer eine handschleifmaschine
DE3805926C2 (de) * 1988-02-25 1996-04-18 Bosch Gmbh Robert Motorisch angetriebenes Handaggregat mit oszillierender Werkzeugbewegung
EP0333933B1 (en) * 1988-03-22 1993-09-15 Maeda Kiko Company Limited Sanding apparatus

Also Published As

Publication number Publication date
US5056268A (en) 1991-10-15
EP0424720A1 (de) 1991-05-02
ES2044363T3 (es) 1994-01-01
DK0424720T3 (da) 1993-12-13
ATE91451T1 (de) 1993-07-15
DE59001962D1 (de) 1993-08-19
DE3935179A1 (de) 1991-04-25
CA2022421A1 (en) 1991-04-24

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