EP0906175A1 - Machine manuelle - Google Patents

Machine manuelle

Info

Publication number
EP0906175A1
EP0906175A1 EP97942809A EP97942809A EP0906175A1 EP 0906175 A1 EP0906175 A1 EP 0906175A1 EP 97942809 A EP97942809 A EP 97942809A EP 97942809 A EP97942809 A EP 97942809A EP 0906175 A1 EP0906175 A1 EP 0906175A1
Authority
EP
European Patent Office
Prior art keywords
tool
shaft
hand
saw
disks
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
EP97942809A
Other languages
German (de)
English (en)
Other versions
EP0906175B1 (fr
Inventor
Manfred Kirn
Manfred Bleicher
Gerd Hahn
Justus Lamprecht
David Matzo
Herbert Faerber
Andreas HÖLDERLIN
Jörg DEHDE
Leon Bujalski
Alex Gawron
Michael Holzer, Jr.
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 EP0906175A1 publication Critical patent/EP0906175A1/fr
Application granted granted Critical
Publication of EP0906175B1 publication Critical patent/EP0906175B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9377—Mounting of tool about rod-type shaft
    • Y10T83/9379—At end of shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9464—For rotary tool

Definitions

  • the invention relates to a handheld power tool according to the preamble of claim 1.
  • a hand-held grinding tool known from DE-OS 44 21 480 carries a grinding wheel on its output shaft between two clamping flanges.
  • the outer clamping flange can be clamped against the grinding wheel via a thread.
  • the inner flange is mounted so that it can be rotated with little friction with respect to the output spindle using a solid lubricant.
  • the outer clamping flange can be easily rotated together with the grinding wheel. This means that the outer clamping flange can be loosened with little force and the grinding wheel can be changed easily.
  • the hand tool according to the invention with the characterizing features of claim 1 has the advantage that when the tool shaft is at a standstill, the outer clamping flange or clamping bolt can be easily released by hand without any additional auxiliary tool. Because the self-releasing or tensioning clamping mechanism is arranged inside the hand-held power tool, it is captive and safe from contamination by dust and chips. It also makes it possible to use an inexpensive mass or standard part as a clamping screw or outer clamping flange.
  • the tensioning mechanism essentially consists of a pair of disks with rolling elements arranged in between, which are held in a certain position by a torsion spring, assembly as an assembly is particularly easy to accomplish.
  • the fact that the clamping mechanism can be prefabricated as a structural unit with the drive pinion for the tool shaft means that the assembly effort is low.
  • the flat head of the cap screw and the particularly flat outer flange prevent a reduction in the depth of cut for miter cuts of more than 45 ° compared to straight cuts because, despite the inclined position of the saw shaft, the axially outermost part of the cap screw or the outer flange does not hit the workpiece before reaching for straight cuts greatest depth of cut threatens.
  • a particularly large bearing dimension can be selected by arranging the saw shaft bearing on the outer circumference of the sleeve region of the outer disk. Such a large needle bearing behaves more wear-resistant than needle bearings of comparable smaller diameter.
  • Another advantage of the invention is that the depressions in the pair of disks can be contoured so that the rolling elements pass through a noticeable pressure point, from which the clamping torque no longer increases. This simplifies the handling of the clamping device because the operator receives clear information when the clamping position has been reached and that the clamping is finished.
  • FIG. 1 shows a spatial representation of a circular saw according to the invention
  • FIG. 2 shows a partial longitudinal section of the circular saw according to FIG. 1 in the area of the saw shaft with the clamping mechanism
  • FIGS. 3, 4, 5, 6 exemplary embodiments for the design possibility of the pair of discs in FIG 7, the special contour of a rolling element bearing in one of the disks, which causes a noticeable pressure point as soon as the clamping position is reached.
  • the hand-held circular saw 10 shown in FIG. 1 has a housing 11 with a handle 12 which contains an on / off switch 13 and an electrical connection cable 14.
  • the housing 11 is pivotably arranged on a base plate 15 on a joint 16.
  • the housing 11 contains a motor, not shown. This drives a saw shaft 17 via a drive pinion 28 (FIG. 2) of a motor shaft. This is rotatably mounted about an axis 18.
  • a head screw 20 which can be screwed into an internally threaded section 19 (FIG. 2) of the saw shaft 17 and has a particularly flat head 19 "axially clamps a particularly flat outer flange 21 against a saw blade 22.
  • the saw blade 22 is encompassed by a saw blade housing 24 in its area arranged above the base plate 15 and emerges from the bottom through a through slot 25 arranged in the base plate.
  • FIG. 2 shows the sectional view of the hand-held circular saw 10 in the area of the saw shaft 17. This is in the housing 11 via saw shaft bearings 32, 34 rotatably and axially immovable.
  • the saw shaft 17 is driven by a pinion
  • the pinion 28 is in engagement with an output pinion 30, which sits on the saw shaft 17 in a rotationally fixed manner.
  • the output pinion 30 is in engagement with an output pinion 30, which sits on the saw shaft 17 in a rotationally fixed manner.
  • An outer disk 37 of the pair of disks 35 adjoins the inner disk 36 axially, with a plurality of rolling elements 38 spaced apart from one another being rotatably mounted between the inner and outer disks 36, 37 or being supported and guided such that they can be passed around their respective axis of rotation 39.
  • the inner and outer disks 36, 37 are biased relative to one another via a torsion spring 40, which engages axially in the disks 36, 37 with legs that are not described in more detail.
  • the outer disk 37 continues in a sleeve-like shaft 37 ', which is positively coupled on the end face to the right end face of the inner flange 23 in the viewing direction, the saw shaft bearing 34, which is a needle bearing with a large, seated on the outside of its cylindrical surface
  • Diameter is.
  • the outer disc 37 is rotatably mounted together with the inner flange 23 relative to the saw shaft 17.
  • the saw blade 22 is supported on the left side of the inner flange 23 in the viewing direction, preferably with increased friction, e.g. through areas of increased roughness.
  • the saw shaft 17 has in its left end in the viewing direction an internally threaded section 19 into which the threaded shaft 19 ′ of the cap screw 20 engages in a screwed manner.
  • the head screw 20 is supported axially with its head 19 ′′ against the outer flange 21, which, with a central polygonal hole 46, closely engages around the outside of the end of the saw shaft 17, which is designed as a flat surface, one flat side of which can be seen as a flattening 44.
  • the outer flange 21 is thereby held against rotation against the saw shaft 17.
  • FIGS. 3, 4, 5 and 6 show pairs of disks 35 rotated by 90 ° according to the sectional arrows X-X according to FIG. 2 with differently contoured recesses for receiving the rolling elements 38.
  • Figure 3 shows that the inner disc 36 has a recess 49 with an inclined surface 48 and rounded flanks on which the rolling element 38 can roll as on an inclined plane, delimited on the left and right by rounded flanks.
  • a recess 50 arranged in the outer pane 37 with an angular contour and without an inclined surface holds the rolling element 38 in a cage-like manner, so that it can only change its position with respect to the outer pane 37 minimally.
  • Figure 4 shows the reverse arrangement compared to Figure 3, i.e. H. the inner pane 36 carries a flat recess 149 and the outer pane 37 a recess 150 provided with a bevel 151 and with rounded flanks.
  • the inner and outer disks 36, 37 carry offset and oppositely arranged depressions 49, 150 with inclined surfaces 48, 151.
  • the rolling element 38 in FIG. 6 is guided in a separate, disk-like cage 53.
  • an oblique depression 249 with an unevenness 260 is arranged which, when rolled over by the rolling element 38, causes a pressure point on the tensioning device, from which the tensioning torque no longer increases and which facilitates handling of the tensioning device.
  • the unevenness is to be dimensioned such that rolling the rolling elements 38 back into the loose position can always be carried out easily.
  • the tensioning device works in the following way: the cap screw 20 is turned by hand with respect to the saw shaft 17, the outer flange 21 being axially supported on the saw blade 22, which is thereby pressed against the inner flange 23 with increasing axial force.
  • the inner flange 23 is supported axially to the right in the viewing direction against the outer disk 37 of the disk pair 35 and via the rolling elements 38 against the inner disk 36, the driven pinion 30 and the bearing 32.
  • the torsion spring 40 is preloaded in such a way that it attempts to turn the pair of disks 35 against one another in such a way that the rolling bodies 38 at the lowest point of the recesses 50 or
  • Recess 49 are mounted and that the axial distance between the inner and outer disks 36, 37 is minimal. If the motor and thus the motor shaft 28 are set in motion by actuating the on / off switch 13, the saw shaft 17 rotates together with the driven pinion 30, the pair of discs 35, the rolling elements 38, the inner flange 23, the saw blade 22 and the outer flange 21 and the screw 20. As a result of the screw 20 being tightened only by hand, there is initially a relatively large amount of slip between the saw blade 22 and the inner and outer flanges 21, 23. Because of its inertia, the saw blade 22 tries to stop relative to the saw shaft 17. The saw blade 22 also tries to hold or delay the inner and outer flange 23, 21.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

La présente invention concerne une machine manuelle (10) dotée d'un outil (22) en forme de disque actionné rotativement, par exemple une scie circulaire, une tronçonneuse à meule ou un outil similaire, d'une cage (12) abritant un moteur d'entraînement de broche (17) portant un outil entre un écrou de fixation, une vis de serrage (19), ou un élément similaire, et des brides d'appui (21, 23), dont celle (23) qui se trouve face à la broche (17) est facilement manoeuvrable, se met en rotation sans l'aide d'un outil et prend appui sans friction importante contre l'outil (22). La fiabilité de fixation et de libération de l'outil tient au fait que des moyens de réglage (35) couplés avec la bride d'appui (22) déplacent axialement celle-ci par effet de couple, notamment par l'intermédiaire de l'outil, en direction de ce dernier (22), quand ils entrent en rotation relative par rapport à la broche porte-outil (17), accroissant ainsi la force de serrage exercée sur l'outil (22), et tendent, lorsque l'outil (22) est au repos, à déplacer axialement la bride d'appui (23) en l'éloignant de l'outil (22), entraînant ainsi une détente de la force de serrage.
EP97942809A 1996-11-29 1997-09-06 Machine manuelle Expired - Lifetime EP0906175B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19649514 1996-11-29
DE19649514A DE19649514A1 (de) 1996-11-29 1996-11-29 Handwerkzeugmaschine
PCT/DE1997/001980 WO1998023410A1 (fr) 1996-11-29 1997-09-06 Machine manuelle

Publications (2)

Publication Number Publication Date
EP0906175A1 true EP0906175A1 (fr) 1999-04-07
EP0906175B1 EP0906175B1 (fr) 2002-02-27

Family

ID=7813135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97942809A Expired - Lifetime EP0906175B1 (fr) 1996-11-29 1997-09-06 Machine manuelle

Country Status (5)

Country Link
US (1) US6148526A (fr)
EP (1) EP0906175B1 (fr)
JP (1) JP2000504282A (fr)
DE (2) DE19649514A1 (fr)
WO (1) WO1998023410A1 (fr)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7610836B2 (en) 2000-08-14 2009-11-03 Sd3, Llc Replaceable brake mechanism for power equipment
US7024975B2 (en) 2000-08-14 2006-04-11 Sd3, Llc Brake mechanism for power equipment
US7350444B2 (en) * 2000-08-14 2008-04-01 Sd3, Llc Table saw with improved safety system
US8061245B2 (en) 2000-09-29 2011-11-22 Sd3, Llc Safety methods for use in power equipment
US7210383B2 (en) 2000-08-14 2007-05-01 Sd3, Llc Detection system for power equipment
US7171879B2 (en) 2001-07-02 2007-02-06 Sd3, Llc Discrete proximity detection system
US7827890B2 (en) * 2004-01-29 2010-11-09 Sd3, Llc Table saws with safety systems and systems to mount and index attachments
US7712403B2 (en) 2001-07-03 2010-05-11 Sd3, Llc Actuators for use in fast-acting safety systems
US7707920B2 (en) 2003-12-31 2010-05-04 Sd3, Llc Table saws with safety systems
US7836804B2 (en) 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
US7055417B1 (en) * 1999-10-01 2006-06-06 Sd3, Llc Safety system for power equipment
US7472634B2 (en) * 2003-08-20 2009-01-06 Sd3, Llc Woodworking machines with overmolded arbors
WO2001078929A1 (fr) * 2000-04-12 2001-10-25 Jore Corporation Outil mecanique a profil mince
US7013987B2 (en) * 2000-09-08 2006-03-21 Black & Decker Clutch assembly and clamp mechanism for rotary tool disc
US6645058B2 (en) 2000-11-30 2003-11-11 Black & Decker Inc. Clamp mechanism for rotary tool disc
TWI268188B (en) * 2005-03-28 2006-12-11 Quarton Inc Cut line indicator
DE102006001986A1 (de) * 2006-01-16 2007-07-19 Robert Bosch Gmbh Spannvorrichtung zum lösbaren Befestigen eines scheibenförmigen Werkzeugs
JP4964642B2 (ja) * 2007-03-27 2012-07-04 株式会社マキタ 回転刃具の固定装置
US8695224B2 (en) * 2007-09-13 2014-04-15 Black & Decker Inc. Saw with increased depth of cut
US8230607B2 (en) 2008-05-09 2012-07-31 Milwaukee Electric Tool Corporation Keyless blade clamp for a power tool
US7952073B2 (en) * 2008-08-01 2011-05-31 Direct Electron, Lp Apparatus and method including a direct bombardment detector and a secondary detector for use in electron microscopy
US20110039482A1 (en) * 2009-07-29 2011-02-17 Terry Timmons Grinder
US20110142885A1 (en) 2009-09-16 2011-06-16 Velico Medical, Inc. Spray-dried human plasma
JP2014079874A (ja) * 2012-09-26 2014-05-08 Makita Corp 動力工具
JP2015020237A (ja) * 2013-07-18 2015-02-02 株式会社ディスコ 切削装置
JP6069122B2 (ja) 2013-07-22 2017-02-01 株式会社ディスコ 切削装置
US10118308B2 (en) 2013-10-17 2018-11-06 Sawstop Holding Llc Systems to mount and index riving knives and spreaders in table saws
US10875109B1 (en) 2018-04-30 2020-12-29 Kreg Enterprises, Inc. Adaptive cutting system
FR3118431B1 (fr) * 2020-12-29 2023-03-24 Renault Georges Ets Outil portatif, de type meuleuse ou disqueuse.

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US2586530A (en) * 1948-07-08 1952-02-19 Stanley Works Saw blade holding means
FR1360283A (fr) * 1963-03-26 1964-05-08 Tête et outil pour débroussailler
DE1289292B (de) * 1964-01-25 1969-02-13 Metabowerke Kg Einspannvorrichtung, insbesondere fuer Handkreissaegen
DE3603384A1 (de) * 1986-02-05 1987-08-06 Bosch Gmbh Robert Vorrichtung zum loesbaren befestigen eines scheibenfoermigen werkzeugs
DE3644440A1 (de) * 1986-12-24 1988-07-07 Bosch Gmbh Robert Spanneinrichtung zum loesbaren befestigen eines werkzeuges, insbesondere einer scheibe
IT1238239B (it) * 1990-02-08 1993-07-12 Selco Srl Mandrino porta lama a disco particolarmente per macchine sezionatrici.
EP0569767B1 (fr) * 1992-05-13 1996-01-03 SCHOBER GmbH Werkzeug- und Maschinenbau Support de couteau
GB9304539D0 (en) * 1993-03-05 1993-04-21 Black & Decker Inc A device having a flange lock
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JPH0768464A (ja) * 1993-09-03 1995-03-14 Hitachi Koki Co Ltd 固定側フランジ

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See references of WO9823410A1 *

Also Published As

Publication number Publication date
US6148526A (en) 2000-11-21
EP0906175B1 (fr) 2002-02-27
JP2000504282A (ja) 2000-04-11
DE59706502D1 (de) 2002-04-04
DE19649514A1 (de) 1998-06-04
WO1998023410A1 (fr) 1998-06-04

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