EP1687120A1 - Grinding-disk receiving element especially for a hand-guided electric grinding tool - Google Patents

Grinding-disk receiving element especially for a hand-guided electric grinding tool

Info

Publication number
EP1687120A1
EP1687120A1 EP20040786842 EP04786842A EP1687120A1 EP 1687120 A1 EP1687120 A1 EP 1687120A1 EP 20040786842 EP20040786842 EP 20040786842 EP 04786842 A EP04786842 A EP 04786842A EP 1687120 A1 EP1687120 A1 EP 1687120A1
Authority
EP
European Patent Office
Prior art keywords
characterized
bearing flange
grinding
bearing
receptacle according
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
EP20040786842
Other languages
German (de)
French (fr)
Other versions
EP1687120B1 (en
Inventor
Alfred Frech
Tobias Lutz
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
Priority to DE2003152501 priority Critical patent/DE10352501A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/DE2004/002126 priority patent/WO2005049277A1/en
Publication of EP1687120A1 publication Critical patent/EP1687120A1/en
Application granted granted Critical
Publication of EP1687120B1 publication Critical patent/EP1687120B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING, OR SHARPENING
    • B24D9/00Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08Circular back-plates for carrying flexible material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors

Abstract

The invention relates to a grinding-disk receiving element for a hand-guided electric grinding tool, in particular, an eccentric grinder (15). Said grinding disk comprises a bearing flange (2) which comprises several locking journals (3) protruding in an axial direction over the surface (18) and several screw bores (8), also comprising a bearing (1) which is arranged in an axial and a radial direction on the bearing flange (2). The locking journals (3) and the screw bores (8) are arranged in an equidistant manner in relation to each other in a common circle about the central axis of the bearing flange in order to mount the grinding disk (5) on the bearing flange in a simple and safe manner.

Description

Sanding plate receptacle for a hand-held electric sanding tool

State of the art

The invention is based on a grinding plate receptacle for a hand-held electric sanding tool with the generic features of claim 1.

There are known grinding disc recording, in which a ball bearing is used in a two-part bearing flange, so that this existing between the two aluminum parts of the bearing flange is clamped in the axial as well as in rapid dialer direction. This is done by means of screws, which are by a grinding plate with screw holes in one of the two parts of the bearing flange in engagement. The second part of the bearing flange is clamped between the bolt holes provided with the part of the bearing flange and the grinding disc. The screws run lansches by guide grooves on the outside of the second part of the bearing. Such a construction is, however, expensive to manufacture and difficult to assemble.

Furthermore, it is known to arrange on the side facing the grinding plate surface of the bearing flange driving pins, which protrude on a circle around the central axis of the bearing flange on the surface. At the same time a number of screw holes are ordered arrival in the surface lying on another circle. By a screw connection of the grinding plate with the bearing flange, it is quite possible, however, that the driving pins not dip into a bore formed on the grinding plate and the functionality of the grinding tool is therefore not given.

Advantages of the Invention

A grinding Telle Up Name according to the invention having the features of claim 1 has the advantage over the prior is that through the arrangement of driving pins and the screw holes on a common circle about the center axis of the bearing flange at the same time equidistant arrangement of adjacent driving pins or screw holes a simple mounting a sanding disk is given, as there is for this a variety of ways of Aufsteckens. At the same time there can be no incorrect assembly in the assembly of the grinding plate, as the drive pin in any case always in a transit-bore engage the grinding plate.

Characterized in that the driving pins are formed in one piece with the bearing flange, the entire bearing flange can be manufactured in a single operation. This is particularly advantageous in an embodiment of the bearing flange and the driving pins of plastic, because only a single tool for the production of the entire bearing flange is needed.

Characterized in that the driving pins each have an insertion bevel on their free ends, a very simple and safe introduction of this driving pins into through holes in the grinding disc is possible, even when a small rotation of the grinding plate relative to its end position is present at the bearing flange. In that a driving pin and a screw hole are arranged on the circle alternately, a good grip of the grinding disk at the same time Si insurers fastening thereof to the bearing flange is ensured.

Characterized in that the driving pins and the screw holes have essentially the same diameter, the through holes may have the grinding plate and the same diameter. Herewith a larger number is achieved at the possible attachment positions of the grinding plate on the bearing flange, which simplifies the mounting.

Characterized in that a cover disc, defines the bearing which is arranged in a recess of the bearing flange in the axial direction, a very simple and inexpensive to realize possibility of axial fixing of the bearing is achieved. In addition, the bearing is protected from dust. It is particularly advantageous here if the

Cover plate with an engagement part in the radial direction formschlussig engages in the recess of the bearing flange. In this way, a very good axial fixing of the bearing is achieved on the bearing flange.

Characterized in that the cover has a collar, which is engageable with a central hole of an insert plate of a sanding plate in a radial direction formschlussig engaged, the assembly of the grinding plate is simplified to the bearing flange again.

Characterized in that the cover is made of a plastic material, an electrical insulation is achieved with respect to the armature shaft of the electric grinding tool. Further advantageous embodiments of the invention are the subject of the dependent claims.

drawings

An embodiment of the invention is explained in more detail in the following description with reference to the accompanying drawings.

The figures show:

Figure 1 is a perspective view of a bearing,

Figure 2 is a perspective view of a erfindungsge- MAESSEN bearing flange,

Figure 3 is a perspective view of a grinding disc recording according to the invention, in which the two objects of the figures are set together 1 and 2,

Figure 4 is a side view of a cover plate,

Figure 5 is a plan view of a grinding plate,

6 shows a random orbit sander with built according to the invention Sanding plate receptacle according to Figure 3 and still-to-mount grinding plate and

7 shows a random orbit sander as shown in Figure 6 with mounted sanding plate.

1 shows a bearing 1 is shown in the form of a ball bearing. This bearing 1 is used for connecting a drive shaft of a hand-held electric sanding tool with a grinding plate 5 (see Figures 5 to 7).

In Figure 2, an inventive bearing flange 2 is ones shown, provides. At its side facing the grinding plate 5 facing surface 18 has four protruding in the axial direction driving pins 3 are formed. 18 In addition, the surface has also four screw holes. 8

From the view in Figure 3, in which the bearing 1 in a

Recess 17 of the bearing flange 2 is fixed radially by means of press fit is good, the spatial arrangement of the driving pin 3 and the screw holes 8 to detect.

The driving pin 3 and the screw holes 8 are arranged on a common circle about the center axis of the bearing flange. 2 The distances between adjacent driving pins 3 and bolt holes 8 are equal. In addition, the Mitnahmezap en 3, and screw holes 8 are arranged alternately on the circle. Thus, always 8 is a screw hole between two driving pins 3 and vice versa.

The driving pins 3 are formed at their free end with in each case an insertion sixteenth Characterized the grinding plate 5 can be easily screwed to the bearing flange 2 (see Figures 6 and 7).

The mounting flange 2 is preferably integral with the exception spigot joint made of plastic. 3 Thus he has only a very light weight and is very easy and inexpensive to manufacture. For example, it can be produced by a single injection molding process by means of a single injection molding tool. In Figure 4, a cover 4 is shown having an engaging part 7 and a collar. 9 The cover 4 is preferably made of plastic, since it is very light and thereby can be made simple and inexpensive. Moreover, characterized an e- lectrical insulation of the armature shaft (not shown) reaches the eccentric grinder 15 relative to the grinding disc. 5 Further details such as the cover 4 with the mounting flange 2 and the grinding disc 5 cooperates, are shown in Figures 6 and 7 and are set forth below.

5 shows a grinding disc 5 is shown, which is screwed onto the bearing flange 2 (see Figures 6 and 7). The abrasive substrate 5 has an insertion plate 10, which is preferably made of plastic. The insertion plate 10 has a central hole 13 and arranged on a circle around the central axis of the insert plate 10 Absauglocher fourteenth

Is about equidistant from one another are formed eight through-holes 12 are arranged on another circle around the central axis of the insert plate 10 of addition. The radius of this circle corresponds exactly to the radius of the circle on which the driving pins 3 and the bolt holes 8 of the bearing flange 2 are arranged. Thereby, the through-holes 12 of the grinding plate 5 can be brought into coincidence with the driving pin 3 and the bolt holes 8 of the bearing flange. 2 For details, and the drawings is for the assembly of the grinding plate 5 on the bearing flange 2 is carried out 6 and 7 below posted.

The insert plate 10 is umschaumt in known manner with a ümschaumung. 11 Since this is not essential to the invention will not be discussed here to this here. 6 shows a pre-assembled random orbit sander 15 is shown, is mounted in the already inventive Sanding plate receptacle (see Figure 3). Moreover, in the bearing flange 2 of the inventive grinding adjusting up would take the cover disc 4 is inserted. The engagement member 7 (see Figure 4) of the cover plate 4 engages here in the recess 17 (see Figure 2) of the bearing flange 2 and fixed thereby the bearing 1 in the axial direction posted for the bearing flange 2. Thus, yet is only the collar 9 of the cover disc 4 over the surface 18 of the bearing flange 2 out. The cover 4 thus not only acts as an electrical insulation with respect to the armature shaft, but also protects the bearing 1 against dust, which leads to a longer life of the bearing. 1

During assembly of the grinding plate 5 on the bearing flange 2 the cover 4 serves as a centering aid because they advertising seen well through the central hole 13 of the grinding plate 5 the can. Thus, the grinding plate has to be properly located only in its angular position 5, so that the Mitna- hemezapfen engage in the through-holes 12 3 and it can be fixed by means of screws. 6 The screws 6 are preferably four Kunststoffformschrau- ben. The correct setting of the angle of the posted

Grinding plate 5 on the bearing flange 2 is further simplified by the o- ben described import tray 16 of the drive pin. 3

In the example shown in Figure 7 the completely assembled state of the eccentric grinder 15 with grinding plate 5 can be clearly seen that all four driving pins 3 as well as all four screws 6 are located in the through-hole punches 12th In addition, the collar 9 of the cover plate 4 and the central hole 13 of the grinding disc 5 are matched such that the collar 9 formschlussig terminates in a radial direction with the central hole. 13

Finding the right angle is still by the presence of eight possibilities - simplified, in which the sliding plate 5 can be connected to the bearing flange 2 - posted for the angle. This means that installation can be carried out every 45 °.

It will be understood by itself, that the invention, four driving pins 3 and four screw holes is limited by no means 8 to a total of eight through-holes 12 in the grinding disc 5 as well. Just as good can be selected 8 a larger or smaller number of driving lugs 3 and screw hole punches. It is also possible to choose a different sequence of driving lugs 3 and screw holes. 8

Essential to the invention is only that the co acquisition tap 3 and the bolt holes 8 are arranged on a common circle about a central axis of the bearing flange 2 and equidistant from each other. It does not matter whether a through hole 12 impinges on a driving pin 3 or a screw hole. 8 Transmitting summary it can be stated that by inventiveness gemaße Sanding plate receptacle is a very simple assembly of the grinding plate 5 is possible on the Lageflansch 2, wherein simultaneously incorrect assembly is avoided.

Claims

claims
comprising 1. Sanding plate receptacle for a hand-held electric sanding tool, in particular a random orbit sander (15) with a Lagerflahsch (2) protruding more in the axial direction across the surface (18) of driving pins (3) and a plurality of screw holes (8), and with a bearing (1), the processing in both axial and radial RICH on the bearing flange (2) is fixed, characterized in that the driving pins (3) and the screw holes (8) on a common circle about the center axis of the bearing flange (2) equidistantly to one another.
2. Sanding plate receptacle according to claim 1, characterized in that the driving pins (3) in one piece with the bearing flange (2) are formed.
3. Sanding plate receptacle according to claim 1 or 2, characterized in that the bearing flange (2) and the driving pins (3) made of a plastic.
4. Sanding plate receptacle according to any preceding Ansprü- before, characterized in that the driving pins (3) at their free ends each have an insertion bevel (16).
5. Sanding plate receptacle according to any preceding Ansprü- before, characterized in that a driving pin (3) and a screw hole (8) are always arranged alternately on the circle.
6. Sanding plate receptacle according to any preceding Ansprü- before, characterized in that the driving pins (3) and the screw holes (8) have substantially the same diameter.
7. Sanding plate receptacle according to any preceding Anspru- before, characterized in that a cover disc (4) the
Bearing (1) in a recess (17) of the bearing flange (2) is arranged, which sets in the axial direction.
8. Sanding plate receptacle according to claim 7, characterized thereby marked, that the cover plate (4) having an engaging part
(7) formschlussig in the radial direction in the recess (17) engages the bearing flange (2).
9. The Sanding plate receptacle according to any preceding Anspru- before, characterized in that the cover plate (4) has a collar (9) provided with a central hole (13) an insert plate (10) of a grinding plate (5) in the radial direction formschlussig engaged engageable.
10. Sanding plate receptacle according to one of claims 7 to 9, characterized in that the cover plate (4) made of a plastic.
EP20040786842 2003-11-11 2004-09-24 Grinding-disk receiving element especially for a hand-guided electric grinding tool Active EP1687120B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2003152501 DE10352501A1 (en) 2003-11-11 2003-11-11 Sanding plate holder for a hand-held electric grinding tool
PCT/DE2004/002126 WO2005049277A1 (en) 2003-11-11 2004-09-24 Grinding-disk receiving element especially for a hand-guided electric grinding tool

Publications (2)

Publication Number Publication Date
EP1687120A1 true EP1687120A1 (en) 2006-08-09
EP1687120B1 EP1687120B1 (en) 2007-05-30

Family

ID=34530189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040786842 Active EP1687120B1 (en) 2003-11-11 2004-09-24 Grinding-disk receiving element especially for a hand-guided electric grinding tool

Country Status (5)

Country Link
US (1) US7217177B2 (en)
EP (1) EP1687120B1 (en)
CN (1) CN100553887C (en)
DE (2) DE10352501A1 (en)
WO (1) WO2005049277A1 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
US8915499B2 (en) 2010-11-09 2014-12-23 Black & Decker Inc. Universal accessories for oscillating power tools
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
USD856766S1 (en) 2012-07-16 2019-08-20 Black & Decker Inc. Oscillating saw blade

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DE10360252A1 (en) * 2003-12-20 2005-07-21 Robert Bosch Gmbh Tool adapter
DE102006021969A1 (en) 2006-05-04 2007-11-08 C. & E. Fein Gmbh oscillatory
DE102006060310A1 (en) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Auxiliary tool for hand-guided grinding machine tool
DE102007036786A1 (en) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Adapter for a motor-driven machine tool with rotatably driven tool
US7727052B2 (en) * 2007-11-09 2010-06-01 Araca Incorporated Removable polishing pad for chemical mechanical polishing
US8852221B2 (en) 2008-06-11 2014-10-07 Medtronic Ps Medical, Inc. Surgical cutting instrument with near-perimeter interlocking coupling arrangement
US8523868B2 (en) * 2008-06-11 2013-09-03 Medtronic Ps Medical, Inc. Surgical cutting instrument with dual surface interlocking coupling arrangement
US8430725B2 (en) * 2008-12-19 2013-04-30 Jovan Pajovic Abrasive disc construction
CN101890671B (en) * 2009-02-17 2014-05-28 C.& E.泛音有限公司 Tool for grinding or polishing for an oscillation drive
USD619152S1 (en) 2009-12-18 2010-07-06 Techtronic Power Tools Technology Limited Adapter
USD623034S1 (en) 2009-12-18 2010-09-07 Techtronic Power Tools Technology Limited Tool arbor
US10245744B2 (en) 2010-03-22 2019-04-02 Cherif Morcos Accessory for oscillating power tools
CN102259328B (en) * 2010-05-28 2014-07-30 南京德朔实业有限公司 Adapter for adapting working component to shaft end of power tool
US8616562B2 (en) * 2010-06-16 2013-12-31 Robert Bosch Gmbh Adapter for coupling an accessory tool to a drive member of a power tool
USD646542S1 (en) 2010-09-29 2011-10-11 Milwaukee Electric Tool Corporation Accessory interface for a tool
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US10011036B2 (en) * 2015-11-09 2018-07-03 Robert Bosch Tool Corporation Blade and blade attachment system for an oscillating tool
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10207385B2 (en) 2010-04-29 2019-02-19 Black & Decker Inc. Accessories for oscillating power tools
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US10124461B2 (en) 2010-04-29 2018-11-13 Black & Decker Inc. Oscillating tool
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
US9242361B2 (en) 2010-04-29 2016-01-26 Black & Decker Inc. Universal accessories for oscillating power tools
US9539647B2 (en) 2010-04-29 2017-01-10 Black & Decker Inc. Oscillating tool
US10040186B2 (en) 2010-04-29 2018-08-07 Black & Decker Inc. Universal accessories for oscillating power tools
US8915499B2 (en) 2010-11-09 2014-12-23 Black & Decker Inc. Universal accessories for oscillating power tools
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
USD856766S1 (en) 2012-07-16 2019-08-20 Black & Decker Inc. Oscillating saw blade
US10245716B2 (en) 2012-07-16 2019-04-02 Black & Decker Inc. Universal accessories for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools

Also Published As

Publication number Publication date
US7217177B2 (en) 2007-05-15
EP1687120B1 (en) 2007-05-30
DE10352501A1 (en) 2005-06-02
CN100553887C (en) 2009-10-28
DE502004003995D1 (en) 2007-07-12
WO2005049277A1 (en) 2005-06-02
CN1878637A (en) 2006-12-13
US20060217048A1 (en) 2006-09-28

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