EP2467235B1 - Appareil de meulage d'angle commandé par moteur - Google Patents

Appareil de meulage d'angle commandé par moteur Download PDF

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Publication number
EP2467235B1
EP2467235B1 EP20100773010 EP10773010A EP2467235B1 EP 2467235 B1 EP2467235 B1 EP 2467235B1 EP 20100773010 EP20100773010 EP 20100773010 EP 10773010 A EP10773010 A EP 10773010A EP 2467235 B1 EP2467235 B1 EP 2467235B1
Authority
EP
European Patent Office
Prior art keywords
tool
gear
angle grinder
housing
gear housing
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.)
Active
Application number
EP20100773010
Other languages
German (de)
English (en)
Other versions
EP2467235A1 (fr
Inventor
Ludwig Kuether
Fabian Huber
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke 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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP2467235A1 publication Critical patent/EP2467235A1/fr
Application granted granted Critical
Publication of EP2467235B1 publication Critical patent/EP2467235B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B23/028—Angle 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Definitions

  • the invention relates to a motor, in particular electric motor driven angle grinder, with a motor housing receiving the motor housing and a transmission components receiving gear housing, with a motor shaft and a tool spindle, which are oriented via a crown gear having angular gear arrangement at an angle to each other, wherein a rotating drivable grinding - Or separation tool can be mounted on the tool spindle.
  • the present invention has for its object to improve an angle grinder of the type mentioned in that hard to reach areas, which are limited in particular of each other at an acute angle sections, better or even can be machined.
  • the ring gear is formed hat-shaped and arranged so that a recess forming the hat shape is oriented to the tool facing side of the ring gear and a toothing of the ring gear on the side facing away from the tool radially outside the recess limiting elevation of the ring gear is arranged, and that the recess is dimensioned so that the tool spindle and a tool spindle which supports the tool spindle relative to a flange of the gear housing extend into the recess in the axial direction.
  • a drive component meshing with the ring gear for example a pinion driven by the motor shaft or seated on the motor shaft, can be arranged at least partially within the axial installation space of the ring gear. This also makes optimal use of the available axial space, and it is possible to realize a minimal height of the gear housing in the area of the tool spindle.
  • the flange of the gear housing also extends with a particular concentric section into the recess of the ring gear in the axial direction. In this way, the extending into the recess portion of the flange form a receiving area for the bearing device.
  • the bearing device relative to the flange of the gear housing, in particular with respect to the concentric portion of the flange of the transmission housing, axially secured by an axially acting securing element, in particular a snap ring, against falling out, wherein the axial securing element in a rear grip position with the flange brought is.
  • the gear housing is bevelled on the side facing away from the motor housing side of a longitudinal axis of the tool spindle toward the front and preferably to the sides, such that the extended course of the chamfer does not project beyond a peripheral edge of the tool.
  • the extended taper of the chamfer cuts the plane of the tool well outside and in front of the peripheral edge of the tool.
  • the tool spindle is made as a component separate from the ring gear and extends through the ring gear and on the tool side facing away from the ring gear, a second bearing means is provided for the tool spindle.
  • the gear housing is designed so elongated that a dimension of the gear housing, starting from a longitudinal axis of the tool spindle in the direction of the motor housing is greater than the radius of the tool, so that the tool does not engage under the motor housing .
  • This elongated design of the gear housing which extends a typical handle shape of the motor housing, makes it possible for the first time to arrange the tool so with respect to the components of the gear housing and the motor housing that it does not reach under the motor housing.
  • this opens up the possibility of arranging the tool closer to the gear housing in the direction of the longitudinal axis of the tool spindle, which in turn saves axial overall height of the gear housing area.
  • Independent protection is also claimed for this inventive idea, in particular in conjunction with the feature that the ring gear is hat-shaped and arranged so that a recess forming the hat shape is oriented towards the tool-facing side of the ring gear.
  • the tool device and in particular the gear housing and its components are designed such that even a protective hood for the tool does not reach under the motor housing, but when viewing the power tool from the side perpendicular to the tool spindle next to the end of Motor housing, that is located entirely within the Be-rich of the gear housing.
  • the protective hood and a holder of the protective hood are completely underneath the tool-facing side of the flange of the transmission housing, so that it axially overlaps the installation space of the motor housing, but, as mentioned above, is arranged in front of the motor housing.
  • This also allows an unprecedented flat design of the angle grinder can be re-al700 as a whole, and that measured from a lower tool level to a tool facing away from the top of the gear housing.
  • the Figures 1 and 2 show the usability of a known angle grinder 2 and an angle grinder 4 according to the invention with a flat design.
  • a gear housing 6 builds very high overall and the grinding or cutting tool 8 has with its tool level a large distance from the tool facing side 10 of the gear housing 6.
  • the tool 8 engages under a subsequent to the gear housing motor housing 12. Due to the overall large axial height is the usability of the known angle grinder 2 in hard to reach areas, which are shown here by at an acute angle to each other oriented pipe sections limited.
  • the angle grinder 4 according to the invention builds according to FIG. 2 overall very flat. The height of the transmission housing is greatly reduced compared to known embodiments.
  • the grinding or cutting tool 16 is completely below the transmission housing 14; It does not intervene, as in known embodiments, the motor housing 18. Even a protective cover 20 is provided below the gear housing 14, so it also does not interfere with the motor housing, whereby the overall flat design can be further reduced.
  • FIG. 2 in that the applicability of the angle grinder 4 according to the invention in areas with limited access is considerably improved. According to FIG. 2 it is easy to reach and process the transitional area of the pipes, even if the transition area is limited by an acute angle between the components of only 35 °.
  • FIGS. 3 - 5 show the formation of the drive train of the angle grinder 4 according to the invention, including a bevel gear assembly 22.
  • a motor shaft 26 which is optionally in driving connection via a gear assembly, not shown in detail with a pinion shaft 30 which is aligned with the motor shaft 26.
  • the pinion shaft 30 carries at its front free end a pinion gear 32 which meshes with a ring gear 34 and thus forms the angular gear assembly 22.
  • a tool spindle 36 is as of the ring gear 34 formed separate component and extends through a central shaft opening 38 through the ring gear 34 therethrough.
  • a longitudinal axis 40 of the tool spindle 36 extends at right angles to a longitudinal axis 42 of the pinion shaft 30 and defines an axial direction 43 of the tool spindle.
  • the tool spindle 36 is further passed through a flange 44 of the gear housing 14 in a manner to be described in more detail, wherein the flange 44 is plate-shaped and closes the gear housing 14 to the tool side outwards.
  • a free end portion 46 carries the tool spindle 36 by way of example an external thread 48, on which a clamping means 50 can be screwed, which tightens the tool 16 against an axial abutment portion 52 of the tool spindle 36 or against a seated on the tool spindle horrsch.
  • the angular gear assembly 22 is specifically formed as follows:
  • the ring gear 34 is hat-shaped. It comprises a recess 54 which opens toward the tool side and is delimited by an elevation 56 formed toward the other side of the ring gear 34.
  • This elevation 56 is of dome-shaped design and, viewed from the outside, can have, for example, a cylindrical or conical basic shape, which, however, is not absolutely necessary.
  • Radially outside this elevation 56, the ring gear 34 has a brim-like portion 58 of the hat shape, which carries on its side facing away from the tool and radially outside the elevation 56 a toothing 60 of the ring gear 34.
  • the ring gear 34 is, as shown in the figures and mentioned above, so oriented so that its recess 54 opens to the tool-facing side and that its toothing 60 is formed on the side facing away from the ring gear 34.
  • the pinion shaft 30 and the pinion gear 32 is at least partially provided within the axial space of the ring gear 34 above its teeth 60, which reduces the axial height.
  • a bearing device 62 is received in the form of a rolling bearing. The bearing device 62 is held within a concentric portion 64 of the flange 44 on its tool-facing side.
  • This concentric portion 64 also protrudes axially into the recess 54 of the ring gear 34 and thereby holds the bearing device 62, in particular an outer shell of a ball bearing.
  • the bearing device 62 is axially secured against falling out by an axially acting securing element 66 in the form of a snap ring 68, which can be clipped into an inner circumferential groove 70 in the wall of the concentric section 64.
  • the tool spindle 36 extends through the central shaft opening 38 of the ring gear 34 and protrudes with an end facing away from the tool 72 on an outer side 74 of the survey 56 axially out.
  • a second bearing device 76 is provided, which supports the tool spindle 36 against the gear housing 14. This bearing is from above with a bearing cap 78 (only FIG. 3 ) locked.
  • FIGS. 4 and 5 shown components of the drive train are advantageously designed as a preassembled module.
  • This assembly can be mounted in an exemplary manner by mounting the flange 44 by means of screw to the underside of the transmission housing 14.
  • the gear housing 14 is completed dustproof to the outside.
  • the storage facilities 62 and 76 also assume a sealing function.
  • a dimension H from a tool-facing lower side of the gear housing 14 or its flange 44 to an upper side of the gear housing 6 in the entire region above the tool 16 is advantageously only about 36 mm; at the location of the longitudinal axis 40 of the tool spindle 36, it is only about 34.5 mm.
  • a tangent 82 in a longitudinal center plane of the angle grinder to the gear housing 14, which also touches a peripheral edge 84 of the tool 16 forms with the tool level 86 in the exemplary and preferably illustrated case an angle of only about 35 °. This, too, is the accessibility of acute-angled areas using the angle grinder 4 according to the invention significantly improved.
  • the protective cover 20 mentioned above can be removed from the angle grinder without tools and attached again, it can be locked in different rotational positions.
  • the attachment and tool-free adjustment of the protective cover 20 is in detail in DE 10 2008 059 249.8 the applicant described so that reference is made in this regard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (10)

  1. Appareil de meulage d'angle motorisé (4), notamment entraîné par un moteur électrique, avec un boîtier moteur (18) agencé pour accueillir les composants motorisés et un boîtier transmission (14), agencé pour accueillir les composants de la transmission, avec un arbre moteur (26) et un arbre d'outil (36), qui sont couplés angulairement à travers une roue en coupelle (34) au moyen d'un dispositif de transmission d'angle (22), dans lequel un outil de meulage ou de coupe (16) rotatif est monté sur l'arbre d'outil (36),
    caractérisé en ce que
    la roue en coupelle (34) est conformée en chapeau et est agencée de telle manière qu'une cavité (54) en forme de chapeau est orientée vers le côté outil de la roue en coupelle (34) et comporte une denturé (60) de la roue en coupelle (34) sur le côté opposé à l'outil de la roue en coupelle (34), radialement à l'extérieur d'un bossage (56) détimitant la cavité (54), et en ce que l'arbre d'outil (36) ainsi que le mécanisme de roulement (62) logé à l'opposé d'un flasque (44) du boîtier transmission (14), s'étendant dans la direction axiale dans la cavité (54).
  2. Appareil de meulage d'angle selon la revendication 1,
    caractérisé en ce que,
    le flasque (44) du boîtier transmission (14) s'étend en direction axiale, en particulier avec une section concentrique (64) dans la cavité (54).
  3. Appareil de meulage d'angle selon la revendication 1 ou 2, caractérisé en ce que,
    le mécanisme de roulement (62) est sécurisé, par rapport au flasque (44) du boîtier transmission (14), en particulier par rapport à la section concentrique (64) du flasque (44) du boîtier transmission (14), au moyen d'un élément de sécurisé (66) opérationnel contre une sortie axiale, en particulier une bague ressort (68), qui est mise en place avec le flasque (44) dans une position de préhension arrière.
  4. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    la hauteur (H) du boîtier transmission (14), dans le secteur de l'outil de meulage ou de coupe (16), mesurée dans la direction axiale (43) de l'arbre d'outil (36),
    depuis un bord extérieur (10) orienté vers l'outil jusqu'à un côté supérieur, opposé au boîtier transmission (14), est au plus de 40mm, en particulier au plus de 38mm, en particulier au plus de 36mm, en particulier au plus de 34mm et, en outre, en particulier au plus de 32mm.
  5. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    le boîtier transmission (14) est biseauté sur le côté opposé au boîtier moteur (18) d'un axe longitudinal (40) de l'arbre d'outil (36), vers l'avant, en particulier vers les côtés, de telle manière que le prolongement du biseau ne dépasse pas un rebord périphérique (84) de l'outil (16).
  6. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    une tangente (82) au boîtier transmission (14) forme avec le plan (86) de l'outil (16) au niveau du rebord périphérique (84) de l'outil (16), un angle de 42° au plus, en particulier de 40° au plus, en particulier de 38° au plus, en particulier de 37° au plus et en particulier de 35° au plus.
  7. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    l'arbre d'outil (36) s'étend à travers la roue en coupelle (34) et en ce que du côté de la roue en coupelle (34), dirigé vers l'outil, est prévu un deuxième mécanisme de roulement (76) pour l'arbre d'outil (36).
  8. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    le boîtier transmission (14) est construit en longueur de telle manière que la dimension du boîtier transmission (14), mesurée depuis un arbre longitudinal (40) de l'arbre d'outil (36) en direction du boîtier moteur (18) est supérieure au rayon de l'outil (16), de sorte que l'outil (16) n'est pas inférieur en dimension au boîtier moteur (18).
  9. Appareil de meulage d'angle selon la revendication 8,
    caractérisé en ce que,
    l'outil (16), avec son plan d'outil supérieur et /ou inférieur (86), n'est pas en appui sur moins de la moitié du boîtier moteur (18), lorsque l'appareil est vu de côté et perpendiculairement à l'arbre d'outil (36).
  10. Appareil de meulage d'angle selon l'une des revendications précédentes,
    caractérisé en ce que,
    également un capot de projection (20) pour l'outil (16) n'a pas une dimension inférieure à celle du boîtier moteur (18).
EP20100773010 2009-11-17 2010-10-15 Appareil de meulage d'angle commandé par moteur Active EP2467235B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910053614 DE102009053614B4 (de) 2009-11-17 2009-11-17 Motorisch angetriebenes Winkelschleifgerät
PCT/EP2010/065505 WO2011061022A1 (fr) 2009-11-17 2010-10-15 Appareil de meulage d'angle commandé par moteur

Publications (2)

Publication Number Publication Date
EP2467235A1 EP2467235A1 (fr) 2012-06-27
EP2467235B1 true EP2467235B1 (fr) 2013-12-25

Family

ID=43416518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100773010 Active EP2467235B1 (fr) 2009-11-17 2010-10-15 Appareil de meulage d'angle commandé par moteur

Country Status (4)

Country Link
US (1) US9095950B2 (fr)
EP (1) EP2467235B1 (fr)
DE (1) DE102009053614B4 (fr)
WO (1) WO2011061022A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1039725C2 (nl) * 2012-07-13 2014-01-16 Bosch Gmbh Robert Inrichting voor het bewerken van een werkstuk.
DE102013210962B4 (de) * 2013-06-12 2016-08-04 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektromotorischen Antrieb und mindestens einem ersten Gehäuseteil
DE102013213124A1 (de) 2013-07-04 2015-01-08 Metabowerke Gmbh Winkelschleifgerät
DE102017218668A1 (de) * 2017-10-19 2019-04-25 Robert Bosch Gmbh Handwerkzeugmaschine
KR102417270B1 (ko) * 2020-07-03 2022-07-04 전창수 핸드 그라인더
US20240173839A1 (en) 2022-11-24 2024-05-30 Makita Cororation Power tool

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267781A (en) * 1939-11-09 1941-12-30 Albertson & Co Inc Electric sanding machine
US6386961B1 (en) * 1999-07-19 2002-05-14 Thomas D. Cureton Hand held grinder
SE523815C2 (sv) * 2002-05-22 2004-05-18 Atlas Copco Tools Ab Portabelt kraftverktyg med fettsmord vinkelväxel med separat fettomfördelningselement
DE102006027785A1 (de) * 2006-06-16 2007-12-20 Robert Bosch Gmbh Handwerkzeugmaschine
US7988538B2 (en) * 2006-10-13 2011-08-02 Black & Decker Inc. Large angle grinder
ATE473067T1 (de) * 2006-12-27 2010-07-15 Metabowerke Gmbh Elektrohandwerkzeug mit bremseinrichtung
DE102008059247A1 (de) * 2008-11-20 2010-05-27 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
DE102008059249B4 (de) 2008-11-20 2014-09-11 Metabowerke Gmbh Winkelschleifgerät mit Schutzhaube

Also Published As

Publication number Publication date
WO2011061022A1 (fr) 2011-05-26
DE102009053614A1 (de) 2011-05-19
US20120282846A1 (en) 2012-11-08
US9095950B2 (en) 2015-08-04
EP2467235A1 (fr) 2012-06-27
DE102009053614B4 (de) 2012-02-09

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