EP1581365B1 - Lageranordnung zur schwingf higen lagerung eines schleiftell ers an einem schleifger t - Google Patents

Lageranordnung zur schwingf higen lagerung eines schleiftell ers an einem schleifger t Download PDF

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Publication number
EP1581365B1
EP1581365B1 EP03810368A EP03810368A EP1581365B1 EP 1581365 B1 EP1581365 B1 EP 1581365B1 EP 03810368 A EP03810368 A EP 03810368A EP 03810368 A EP03810368 A EP 03810368A EP 1581365 B1 EP1581365 B1 EP 1581365B1
Authority
EP
European Patent Office
Prior art keywords
bearing arrangement
sander
arrangement according
plate
mounting
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
EP03810368A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1581365A1 (de
Inventor
Justus Lamprecht
Tobias Lutz
Christoph Cramer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1581365A1 publication Critical patent/EP1581365A1/de
Application granted granted Critical
Publication of EP1581365B1 publication Critical patent/EP1581365B1/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
    • 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
    • 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 bearing arrangement for the oscillatory mounting of a sanding pad on a grinding device, in particular in a 1/4 blade orbital sander, according to the preamble of claim 1.
  • a bearing assembly is made US Pat. No. 3,862,520 known.
  • the sanding pad is driven by an eccentric to oscillate laterally, the sanding pad being connected to the sanding device by elastic oscillating legs.
  • the oscillating legs prevent, on the one hand, that the rotational movement of this eccentric is transmitted to the sanding pad and thus form an anti-twist device for the sanding pad.
  • the oscillating legs absorb the contact pressure acting on the sanding pad and pass it on to the sanding device.
  • the oscillating legs should consume as little vibration energy as deformation energy in their torsional deformation in order to save electrical energy for the drive, which is particularly important in battery-powered grinders because of the limited battery capacity.
  • the oscillating legs are connected to each other by a plastic bridge and form a unitary component, so that all oscillating legs are mounted together with the plastic bridge.
  • the invention provides a bearing arrangement, according to the claim 1, for the oscillatory storage of a sanding pad on a grinding device, in which the oscillating legs are arranged individually or in groups of several oscillating legs in several separate modules.
  • each module has three oscillating legs, but the individual oscillating legs can also be divided into the individual modules in a different way.
  • each module can also have one, two or four oscillating legs.
  • the elastic connection of the sanding plate with the grinding device does not necessarily have to be made by oscillating legs whose longitudinal extent is substantially greater than their thickness. Rather, it is also possible to use differently shaped vibrating body, if the vibrating body form an elastic connection between the grinding disc and the grinding device.
  • the bearing assembly according to the invention can be used not only in a grinding device, but also in a polishing apparatus in which a polishing plate is driven by an eccentric to lateral swinging movements.
  • the bearing assembly according to the invention connects the polishing plate vibratory with the polishing machine.
  • the individual modules have a bayonet closure for mounting on the grinding device.
  • the attachment of the individual modules is done so preferably by plugging and then moving or twisting the individual modules, which allows installation without tools.
  • the individual modules each have a groove and / or a spring, so that adjacent modules form a tongue and groove connection in the mounted state.
  • the individual modules preferably have a mounting body for attachment to the grinding device and a guide body for guiding the grinding plate, wherein the mounting body is connected by at least one of the oscillating body with the guide body.
  • the guide body with the sanding pad can in this case thus perform relative to the mounting body oscillatory movements, which are generated for example by an eccentric.
  • the guide body for screwing to the sanding pad on a screw which may for example consist of a simple blind hole into which a fastening screw can engage.
  • the attachment of the sanding pad is done so by screws that are screwed from the workpiece side of the sanding pad through the sanding pad into the screw.
  • the guide body preferably has on its side facing the sanding pad a projection which engages positively in a correspondingly adapted fastening receptacle in the sanding pad.
  • the projection on the guide body is out of round to form an anti-rotation.
  • tightening the sanding plate on the bearing assembly according to the invention is the introduced by the mounting screw in the guide body of the bearing assembly torque then derived via the positive and rotationally secure connection between the projection on the guide body and the mounting receptacle of the sanding pad in the sanding pad.
  • the mounting body of the bearing assembly according to the invention is plate-shaped and has at one side edge at least one recess for a correspondingly adapted spring on the grinder.
  • the individual modules are thus attached to the grinder so that the spring engages the grinder in the associated recess on the side edge of the module.
  • the modules are then moved so that the spring on the grinder is no longer over the recess, but detects the side edge of the mounting body and thereby fixed.
  • To disassemble the module must then be moved again so that the spring is above the recess in the side edge of the mounting body, whereupon the module can be easily removed.
  • the mounting body has at least one projection which, in the mounted state, forms a frictional connection with a correspondingly adapted receptacle on the grinding device.
  • this projection directly adjoins the recess in the side edge of the mounting body, so that when moving the mounting body, a frictional or clamping effect is produced, whereby the module is fixed.
  • the mounting body preferably has a spring on the side facing the grinding device and / or on the side facing away from the grinding device, which in the installed state forms a spring-groove connection with a correspondingly adapted groove on the grinding device.
  • the invention is not limited to the bearing arrangement described above, but also includes a complete grinding or polishing device with such a bearing arrangement.
  • FIG. 1 shows an orbital sander 10, which is constructed conventionally and will be briefly described below, to then respond to the peculiarities of the invention.
  • the orbital sander 10 has an electric motor which drives an output shaft 14, wherein the output shaft 14 is additionally rotatably mounted in a ball bearing 16.
  • the output shaft 14 has a free end, to which an eccentric sleeve 18 is pressed, so that the eccentric sleeve 18 is rotatably mounted on the output shaft 14 and fixed in the axial direction.
  • an eccentric sleeve 18 is pressed, so that the eccentric sleeve 18 is rotatably mounted on the output shaft 14 and fixed in the axial direction.
  • the attachment of the eccentric sleeve 18 on the output shaft 14 can also be done in other ways, such as by a screw connection.
  • the eccentric sleeve 18 thus rotates with the output shaft 14 and is therefore balanced with respect to the output shaft 14 in order to avoid vibrations during operation.
  • the eccentric sleeve 18 at its workpiece-side end a cup-shaped, cylindrical receptacle for a ball bearing 20 with an inner ring and an outer ring, wherein the receptacle for the ball bearing 20 with respect to the output shaft 14 is arranged eccentrically.
  • the outer ring of the ball bearing 20 is pressed into the receptacle, while in the inner ring of the ball bearing 20, a sleeve-shaped receiving part 22 is pressed.
  • the sleeve-shaped receiving part 22 serves for fastening a sanding plate 24 and has for this purpose at its tool-side end an internal thread 26, as in particular FIG. 2 is apparent.
  • the sanding pad 24 has a mounting hole 28 for attachment to the sanding device 10 in the middle region, through which a central fastening screw 30 can be screwed into the internal thread 26 of the receiving part 22.
  • the attachment of the grinding plate 24 to the grinder 10 by a screw thus allows a simple way an exchange of the grinding plate 24, so that with the grinder 10 after selection of appropriate grinding plate 24 either a flat grinding or a contour grinding is possible.
  • the grinder 10 has a plurality of elastic oscillating legs 32 made of polyoxymethylene (POM), which guide member 34 rotationally fixed, but laterally yielding.
  • the oscillating legs 32 may also consist of other elastic and resistant materials that show as possible no material fatigue, even with long-term operation and frequent deformations, with exemplified polyamide (PA) and polypropylene (PP) are mentioned.
  • the guide element 34 engages in a formed on the upper side of the grinding plate 24 circumferential collar 36, so that the freedom of movement of the grinding plate 24 is limited to plane-parallel movements.
  • the peripheral collar 36 of the grinding plate 24 is therefore out of round and approximately triangular, whereby the sanding pad 24 is secured against rotation.
  • a rotation of the output shaft 14 thus leads due to the eccentric mounting of the receiving part 22 in the eccentric sleeve 18 to plane-parallel grinding movements of the grinding plate 24th
  • the grinding device 10 has a housing 38 which terminates on its underside by a sealing lip 40 with the top of the grinding plate 24.
  • FIGS. 2a to 2c and 3a and 3b show a module 42 of a four-part bearing assembly, which can be used in a vibratory grinder similar to the orbital sander 10 instead of the guide member 34 with the vibrating legs 32.
  • the module 42 has a mounting plate 44 and a guide plate 46, which are interconnected by three elastic oscillating legs 48, wherein the mounting plate 44, the guide plate 46 and the oscillating legs 48 are made of plastic. Due to their elasticity, the three oscillating legs 48 allow lateral oscillating movement of the sanding plate 24, which is driven by the eccentric sleeve 18.
  • the guide plate 46 In the mounted state, the guide plate 46 is connected to the sanding pad 24.
  • the guide plate 46 has a screw receptacle 50 into which a fastening screw engages in the mounted state, which connects the sanding pad 24 by a screw connection with the guide plate 46.
  • the guide plate 46 on the grinding plate 24 side facing a projection 52 which in the mounted state in a receptacle in engages the sanding pad 24 to produce a positive connection between the sanding pad 24 and the guide plate 46.
  • the projection 52 is in this case out of round and has two flattened sides, whereby an anti-rotation is formed.
  • the mounting plate 44 of the module 42 is connected in the mounted state with the housing 38 of the grinder 10, as shown in FIGS. 3a and 3b is apparent.
  • the connection between the mounting plate 44 and the housing 38 of the grinder 10 takes place here by a Bayonettver gleich, so that a simple assembly and disassembly of the module 42 without tools is possible.
  • the mounting plate 44 on one side edge two recesses 54.1, 54.2, in which in the in FIG. 3a shown assembly position two springs 56.1, 56.2 engage, so that the module 42 can be inserted into the housing 38 on the workpiece side.
  • the springs 56.1, 56.2 slide through the associated recesses 54.1, 54.2 on the mounting plate 44th
  • the module 42 is then removed from the in FIG. 3a shown assembly position in the in FIG. 3b shown end position, the springs 56.1, 56.2 in the end position of the module 42 next to the recesses 54.1, 54.2 on the Rest mounting plate 44 and clamp the mounting plate 44 thereby.
  • two springs 60, 62 are formed on the mounting plate 44, which guide the mounting plate 44 in the assembled state, wherein the spring 60 engages in a correspondingly adapted groove in the housing 38 of the grinder 10.
  • the mounting plate 44 of the module 42 has a wedge-shaped groove 64 into which engages a suitably adapted spring of an adjacent module in the assembled state, so that the individual modules of the bearing assembly according to the invention are mechanically connected to each other and still mounted individually and therefore with a small footprint can.
  • the bearing assembly consists of four modules 42, which are each constructed mirror-inverted and have either the groove 64 or a spring adapted accordingly.
  • the invention is not limited to the preferred embodiment described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP03810368A 2002-11-06 2003-07-11 Lageranordnung zur schwingf higen lagerung eines schleiftell ers an einem schleifger t Expired - Lifetime EP1581365B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251556 2002-11-06
DE10251556A DE10251556A1 (de) 2002-11-06 2002-11-06 Lageranordnung zur schwingfähigen Lagerung eines Schleiftellers an einem Schleifgerät
PCT/DE2003/002337 WO2004041478A1 (de) 2002-11-06 2003-07-11 Lageranordnung zur schwingfähigen lagerung eines schleiftellers an einem schleifgerät

Publications (2)

Publication Number Publication Date
EP1581365A1 EP1581365A1 (de) 2005-10-05
EP1581365B1 true EP1581365B1 (de) 2010-04-07

Family

ID=32115266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03810368A Expired - Lifetime EP1581365B1 (de) 2002-11-06 2003-07-11 Lageranordnung zur schwingf higen lagerung eines schleiftell ers an einem schleifger t

Country Status (6)

Country Link
US (1) US7207872B2 (zh)
EP (1) EP1581365B1 (zh)
JP (1) JP2006504540A (zh)
CN (1) CN100522475C (zh)
DE (2) DE10251556A1 (zh)
WO (1) WO2004041478A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005009739A1 (de) 2005-03-03 2006-09-07 Robert Bosch Gmbh Handwerkzeugmaschine
US8100745B2 (en) * 2007-03-16 2012-01-24 Black & Decker Inc. Low vibration sander with a flexible top handle
JPWO2014132745A1 (ja) * 2013-02-28 2017-02-02 日立工機株式会社 動力工具
JP6342252B2 (ja) * 2014-07-28 2018-06-13 京セラインダストリアルツールズ株式会社 サンダ
CN108067985B (zh) * 2016-11-08 2023-11-07 苏州宝时得电动工具有限公司 砂光机
CN107498461B (zh) * 2017-09-26 2023-12-19 广州市锐恒科技有限公司 一种高效抛光研磨复合主轴
CA3054036A1 (en) * 2018-12-28 2020-06-28 Virtual Machines Inc. Method and system for producing abrasive products

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US2848850A (en) * 1956-08-10 1958-08-26 Rotex Company Electric sanders
US2885833A (en) * 1957-06-19 1959-05-12 Oster Mfg Co John Hand held sanding and abraiding machine
US3336702A (en) * 1964-02-28 1967-08-22 Black & Decker Mfg Co Oscillating platen for abrading tool
US3345784A (en) * 1964-12-29 1967-10-10 Rockwell Mfg Co Orbital finishing sander
GB1216238A (en) * 1968-05-17 1970-12-16 Black & Decker Ltd Improvements in or relating to power-driven abrasive tools
US3815292A (en) * 1972-08-21 1974-06-11 A Hutchins Structure and manufacture of abrading tool having suction system
US3849943A (en) * 1973-02-26 1974-11-26 Rockwell International Corp Power operated sanding machine
US3862520A (en) * 1974-02-14 1975-01-28 Singer Co Support assembly for a portable surface-treating machine
US3918214A (en) 1974-10-02 1975-11-11 Mc Graw Edison Co Vibrating sander
JPS5410625Y2 (zh) * 1974-12-09 1979-05-16
JPS52135592U (zh) * 1976-04-09 1977-10-14
US4095375A (en) * 1977-03-16 1978-06-20 The Singer Company Support assembly for a portable surface-treating machine
JPS56126350U (zh) * 1980-02-21 1981-09-25
US4397120A (en) * 1981-09-01 1983-08-09 Black & Decker Inc. Suspension system for an abrading tool
JPS607953U (ja) * 1983-06-27 1985-01-19 リョービ株式会社 研摩機の集塵装置
US4837981A (en) * 1987-07-06 1989-06-13 Ryobi Limited Power operated sanding machine
JPH0683952B2 (ja) * 1989-09-05 1994-10-26 株式会社マキタ コードレス研摩機
DE59410331D1 (de) * 1994-02-03 2003-11-27 Bosch Gmbh Robert Handwerkzeugmaschine zur Flächenbearbeitung
JP3634995B2 (ja) * 1999-12-07 2005-03-30 株式会社マキタ サンダ
NL1015488C2 (nl) * 2000-06-21 2001-12-28 Skil Europ Bv Vlakschuurmachine met verwisselbaar deel van schuurzool.
GB2380151B (en) * 2001-07-20 2004-09-22 Black & Decker Inc Oscillating hand tool
DE10160265A1 (de) * 2001-12-07 2003-06-18 Bosch Gmbh Robert Handschwingschleifmaschine

Also Published As

Publication number Publication date
US20050164615A1 (en) 2005-07-28
CN1694780A (zh) 2005-11-09
DE50312600D1 (de) 2010-05-20
WO2004041478A1 (de) 2004-05-21
EP1581365A1 (de) 2005-10-05
CN100522475C (zh) 2009-08-05
US7207872B2 (en) 2007-04-24
DE10251556A1 (de) 2004-05-19
JP2006504540A (ja) 2006-02-09

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