EP2821179A1 - Meuleuse d'angle - Google Patents

Meuleuse d'angle Download PDF

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Publication number
EP2821179A1
EP2821179A1 EP13191765.0A EP13191765A EP2821179A1 EP 2821179 A1 EP2821179 A1 EP 2821179A1 EP 13191765 A EP13191765 A EP 13191765A EP 2821179 A1 EP2821179 A1 EP 2821179A1
Authority
EP
European Patent Office
Prior art keywords
tool
tool spindle
ring gear
gear
angle grinder
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.)
Withdrawn
Application number
EP13191765.0A
Other languages
German (de)
English (en)
Inventor
Martin Pietzsch
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 EP2821179A1 publication Critical patent/EP2821179A1/fr
Withdrawn legal-status Critical Current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
    • B24B23/028—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
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/08—Grinders for cutting-off being portable
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/667—Connectors therefor

Definitions

  • the invention relates to an angle grinder according to the preamble of claim 1.
  • the term angle grinder is to be understood in the present case also typical cut-off devices.
  • Angle grinders of this type have become known several times in the art.
  • different ways of forming the angular gear arrangement have been proposed, including the use of belt drives (for example, according to DE 43 42 986 C1 or DE 159 975 A1 ).
  • Angular gear arrangements are also known with a pinion on the motor shaft and a bevel gear or ring gear, which is fastened on the tool spindle (eg. DE 140 65 658 A1 or US 6,386,961 B1 ).
  • a pinion on the motor shaft
  • a bevel gear or ring gear which is fastened on the tool spindle
  • the prior art see, for example EP 0 579 949 A1
  • also proposed flexible drive shafts in the prior art (see, for example EP 0 579 949 A1 ) also proposed flexible drive shafts.
  • German patent applications of the Applicant DE 10 2008 059 247 A1 and DE 10 2009 053 614 A1 also deal with the specific design of an angle grinder, which in particular has a compact and flat construction of the gear housing to allow a simplified accessibility of the angle grinder even in tight processing spaces such as in acute corners or the like.
  • the tool spindle is formed in one piece and at least one bearing seat portion for a rolling bearing, designed as a crown portion of the angular gear assembly, a Supporting section for the grinding tool or for a support flange for the grinding tool and a threaded portion for a clamping means for fixing the grinding tool to the tool spindle. Due to the one-piece design a particularly compact design should be achieved.
  • the present invention is therefore based on the object to provide an alternative solution for an angle grinder of the type described above, which also has a compact and flat construction at least in the region of the gear housing of the angle gear assembly.
  • an angle grinder with a motor for driving a tool spindle wherein the tool spindle is arranged via an angular gear arrangement at an angle to a driving shaft of the motor, and wherein the angular gear assembly is accommodated in an associated gear housing, out of which a free end of Tool spindle is able to extend, on which a disc-shaped, rotatable about the central longitudinal axis of the tool spindle tool by means of a technikzugflansches is fastened.
  • the gear housing is designed such that at least the front gear housing of the angular gear assembly has a facing away from the free end of the tool spindle end surface, wherein the maximum distance between this and an end face of the free end of the tool lock defines a height of the gear housing and wherein the height has predetermined ratio to the diameter of the disk-shaped tool of a maximum of 1 to 2, in particular from 2 to 5.
  • the free end of the tool spindle is thus defined as the area which protrudes from the gear housing and on which the tool can be attached.
  • the tool flange forms a support section for the disk-shaped tool, which can be at least partially brought into contact with these to take a defined position relative to the tool spindle.
  • a clamping device such as a clamping nut
  • the tool can be clamped against the tool flange for attachment to the tool spindle.
  • the tool flange may be formed as a separate element which can be fastened to the tool spindle, or be formed integrally with the tool spindle.
  • the front portion of the transmission case is understood to mean that portion which extends axially from the tool spindle to the front, i.e., the longitudinal axis of the driving shaft of the motor. extending from the engine end remote from the transmission housing.
  • facing away from the free end of the tool spindle end face forms the highest in this area, ie axially remote from an end face of the free end of the tool spindle portion of the front gear housing and consequently limited together with the end face the relevant height of the front gear housing.
  • the end surface facing away from the free end of the tool spindle is formed by an outer surface of the gear housing in the region of the tool spindle.
  • the end surface of the housing and the end face of the tool spindle may be formed parallel to each other or inclined to each other. In this case, at least the maximum distance between them defines the height of the angle grinder in the area of the tool spindle, which has a predetermined ratio of at least 2 to 5 with respect to the diameter of the disk-shaped tool. This ratio of the height to the diameter of the tool designed, for example, as a grinding wheel can in turn ensure improved accessibility of the angle grinder into narrow or pointed corners.
  • the tool-facing end surface of the tool flange spans an imaginary plane which at least partially intersects the motor.
  • the end face of the tool flange facing the free end of the tool spindle denotes the side of the tool flange which is closest to the free end of the tool spindle, which projects out of the housing. As described above, this generally coincides with the gear housing facing top of an adjacent disc-shaped tool and defines an imaginary plane, which is offset relative to the motor housing and the motor in such a way that it at least partially intersects the motor.
  • the gear housing thus has at least in the region of the tool flange a smaller (relative to the tool spindle axis) axial extent than the motor housing and the motor therein.
  • a tangent which can be applied starting from a peripheral edge of the disk-shaped tool to the gear housing, together with the imaginary plane forms an angle of at most 40 °, in particular of at most 35 °, preferably less than 34 °. It is thus defined a tangent which is applied starting from a peripheral edge of a disk-shaped tool to the transmission housing.
  • the inclination of the tangent thus depends on two factors, namely on the one hand the diameter of the grinding tool used and on the other by the specific design of the gear housing, in particular of possibly mounted on the housing bevels, which have a favorable slope for the tangent.
  • This likewise imaginary tangent encloses an angle of maximally 40 ° with the imaginary plane defined above. The smaller the angle, the more of course the accessibility of the angle grinder and thus its handling will be improved.
  • the radius of the disk-shaped tool is smaller than the radial extent of the gear housing from the central longitudinal axis of the tool spindle.
  • the radial extent of the transmission housing accordingly extends in the direction parallel to the tool level.
  • the gear housing according to the invention has a comparatively small extent in the axial direction (relative to the central longitudinal axis of the tool spindle) starting from the central longitudinal axis of the tool spindle, but in the radial direction a greater extent than the radius of the disk-shaped tool.
  • a transmission housing axially shorter than the motor housing can be provided, which in turn improves the accessibility of the angle grinder.
  • the grinding wheel can be mounted independently of the dimensions of the motor housing close to the free end of the tool spindle facing end surface of the gear housing, ie the standing out of the gear housing part of the tool spindle are kept relatively short.
  • the angular gear arrangement comprises a ring gear, wherein the ring gear is formed substantially hat-shaped with a peripheral flange and a receiving portion forming the hat shape, wherein on the flange a toothing of the ring gear is provided, and wherein the receiving portion is suitable, at least to receive a part of a bearing the tool spindle relative to the gear housing bearing device.
  • the receiving portion of the ring gear is thus opened in one direction, wherein the opening of the exception portion is limited in the other direction by an elevation formed to the other side of the ring gear.
  • This survey may be formed dome-shaped and viewed from the outside, for example, cylindrical or conical basic shape.
  • the bearing device may in particular comprise two rolling bearings, which serve for the rotatable mounting of the tool spindle within the gear housing.
  • the receiving section is capable of accommodating not only one but possibly also a plurality of bearings of the bearing device. In this way, even more space can be saved in the axial direction compared to the prior art.
  • the toothing of the ring gear is used for engagement with a pinion gear, which is driven by the motor shaft.
  • the torque is transmitted from the motor shaft to the tool spindle via the teeth of the ring gear.
  • the ring gear can be rotatably connected to the tool spindle, wherein the tool spindle is rotatably supported, for example via two bearings as a bearing device within the gear housing.
  • the toothing of the ring gear can be arranged on a free end of the tool spindle facing side of the ring gear.
  • the toothing of the ring gear is preferably the opening of the receiving portion of the ring gear from the free end of the tool spindle pioneered oriented to provide a particularly space-saving design of the ring gear in the axial direction.
  • the toothing of the ring gear can also be arranged on a side facing away from the free end of the tool spindle side of the ring gear.
  • the opening of the receiving portion of the ring gear is oriented towards the free end of the tool spindle.
  • the angular gear arrangement comprises a ring gear, which is formed substantially disc-shaped, wherein on the outer edge of the ring gear toothing is provided, which is arranged on one side of the ring gear, wherein at least a part of a the tool spindle relative to the gear housing superimposed storage device, preferably all parts of the bearing device is arranged with respect to the ring gear on the same side or are, like the teeth.
  • FIG. 1 shows a machine tool according to the invention in the form of an angle grinder 10 according to a first embodiment.
  • This differs from the embodiments of the FIGS. 2 a to 2 c exclusively in the specific embodiment of an angle gear assembly 14 of the angle grinder 10.
  • the in the FIGS. 2a to 2c For the same features, therefore, the variants shown have the same reference numerals, but depending on the embodiment, the numbers "1", "2" and "3" are prefixed.
  • angle grinder includes a motor 12 having a stator 12 which surrounds a rotor 12b, which rotates with a driving shaft 12c of the motor 12 about its longitudinal axis L1. Furthermore, an angular gear assembly 14 is provided to transmit a transmission of the torque from the driving shaft 12 of the motor 12 to a tool spindle 18 arranged at an angle thereto.
  • the angular gear assembly 14 is received in a gear housing 16 and includes in addition to the tool spindle 18 a tool flange 20, which serves together with a clamping nut 34 for attachment of a disk-shaped tool 22 on the tool spindle 18, a bearing means 28 for supporting the tool spindle 18 within the gear housing 16 as well a ring gear 24 provided for decreasing the input torque from the driving shaft 12c.
  • the tool spindle 18 can rotate together with a tool 22 attached thereto about its central longitudinal axis L 2 .
  • the tool flange is opposite to in FIG. 1 shown lower edge of the motor stator 12a after (in FIG. 1 ) arranged above offset so that its end face facing the tool 20a an imaginary plane E spans, which intersects the motor 12 in the region of its stator 12a.
  • the gear housing 16 includes in the area of the tool spindle 18 one of the free end of the tool spindle 18th opposite end surface 16a and parallel thereto arranged a housing cover 16b.
  • the area of the disc-shaped tool 22 used which extends from the tool spindle 18 in the forward direction, ie, away from the motor 12. Accordingly, the gear housing dimensions in just this front area are particularly relevant for the accessibility of the angle grinder in a narrow processing space.
  • the front region of the transmission housing that region is understood which extends axially relative to the longitudinal axis L 1 from the tool spindle to the front end (of the motor 12) of the transmission housing.
  • facing away from the free end of the tool spindle end surface 16a forms the highest in this area, d. H. axially distal from an end face 18 a of the free end of the tool spindle 18 portion of the front gear housing 16 and thus limited together with the end face 18 a height H of the front gear housing sixteenth
  • an addition to this height H further relevant size for the accessibility of the angle grinder in, for example, corner corners or the like represents the inclination of a tangent T, which is indicated by the angle ⁇ .
  • the tangent T extends from a peripheral edge of the tool 22 along the gear housing 16 and clamped together with the imaginary plane E the angle ⁇ .
  • the actual peripheral edge of the disc 22 since this determines the actual accessibility of the angle grinder 10 in practice.
  • the concrete design of the tool 22 in addition to the diameter D and the height H, the concrete design of the tool 22 as a cranked or as a flat disc before, how well you get with the angle grinder 10 in hard-to-reach processing spaces.
  • the further dimensions of the gear housing 16 from the area of the tool spindle 18 toward the motor 12 therefore only play a role for accessibility insofar as they are not allowed to have any projections extending beyond the tangent T or an abutment of the disk-shaped tool 22 to the Tool flange 20 must be possible without obstruction.
  • a disincentive installation of the tool 22 to the tool flange 20 readily possible and it is a particularly flat structure of the gear housing 16 regardless of the design of the motor housing (not shown) is provided.
  • the ring gear 24 as well as in FIG. 2a shown variant disc-shaped, wherein at the outer edge 28, 126 of the ring gear 24, 124 a toothing 126 a (see. FIG. 2a
  • the teeth serve in a known manner to the driving torque of the driving shaft 12 c of the motor 12 from a drive pinion 30 to the ring gear 24 and thus to transmit the tool spindle 18.
  • the ring gear 24 may, as shown, be formed as a separate element which is rotatably connected to the tool spindle 18, or alternatively be formed integrally with the tool spindle.
  • the ring gear is not disk-shaped, but has a hat-shaped design and, in addition to an outer flange 226, 326, on which the teeth 226a and 326a are formed, has a receiving portion 232, 323 forming the hat shape.
  • the receiving portion 232, 332 of the hat-shaped ring gear 224, 324 is bounded by a protrusion 232 a, 332 a, which is formed dome-shaped and from the outside regarded as an example may have a cylindrical or conical basic shape, but this is not mandatory.
  • the receiving section serves to at least part of the bearing device 228, 328, ie, for example, as in FIG. 2b shown one of the rolling bearings 228a of the bearing device 228 or as in Figure 2c shown to accommodate even both bearings of the bearing device 328.
  • the teeth 226a and 326a are respectively formed on a side of the ring gear 224, 324 facing away from the opening of the receiving portion 232, 323.
  • the bearings of the bearing device 28 can be secured in position within the housing 16, usually by projections or shoulders on the gear housing 16 and by providing a snap ring or the like, regardless of the design of the ring gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)
EP13191765.0A 2013-07-04 2013-11-06 Meuleuse d'angle Withdrawn EP2821179A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013213124.0A DE102013213124A1 (de) 2013-07-04 2013-07-04 Winkelschleifgerät

Publications (1)

Publication Number Publication Date
EP2821179A1 true EP2821179A1 (fr) 2015-01-07

Family

ID=49518837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13191765.0A Withdrawn EP2821179A1 (fr) 2013-07-04 2013-11-06 Meuleuse d'angle

Country Status (3)

Country Link
US (1) US20150017892A1 (fr)
EP (1) EP2821179A1 (fr)
DE (2) DE102013213124A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013215821A1 (de) * 2013-08-09 2015-02-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektromotorischen Antrieb als Direktantrieb
CN110842700A (zh) * 2019-11-26 2020-02-28 衡阳阳光陶瓷有限公司 一种陶瓷胚料外壁修整装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579949A1 (fr) 1992-07-14 1994-01-26 Robert Bosch Gmbh Machine à rectifier les surfaces
DE4342986C1 (de) 1993-12-16 1994-12-15 Metabowerke Kg Motorbetriebenes Handwerkzeug mit Riemenantrieb
US6386961B1 (en) 1999-07-19 2002-05-14 Thomas D. Cureton Hand held grinder
DE10059975A1 (de) 2000-12-02 2002-06-06 Bosch Gmbh Robert Handwerkzeugmaschine
DE10065658A1 (de) 2000-12-29 2002-07-18 Bosch Gmbh Robert Getriebevorrichtung mit einem Getriebegehäuse
DE102008059247A1 (de) 2008-11-20 2010-05-27 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
DE102009053614A1 (de) 2009-11-17 2011-05-19 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE159975C (fr)
US2088330A (en) * 1936-05-16 1937-07-27 Albertson & Co Inc Sanding and polishing machine
US2273626A (en) * 1940-07-11 1942-02-17 Chicago Pneumatic Tool Co Two-speed sander
US3899852A (en) * 1974-08-23 1975-08-19 Singer Co Spindle drive assembly for a surface-treating machine
US6925718B2 (en) * 1999-09-22 2005-08-09 Andreas Stihl Ag & Co. Tool head
GB2383006A (en) * 2001-12-13 2003-06-18 Black & Decker Inc Mechanism for use in a power tool and a power tool including such a mechanism
EP1674215B1 (fr) * 2004-12-23 2016-09-28 Black & Decker Inc. Marteau perforateur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579949A1 (fr) 1992-07-14 1994-01-26 Robert Bosch Gmbh Machine à rectifier les surfaces
DE4342986C1 (de) 1993-12-16 1994-12-15 Metabowerke Kg Motorbetriebenes Handwerkzeug mit Riemenantrieb
US6386961B1 (en) 1999-07-19 2002-05-14 Thomas D. Cureton Hand held grinder
DE10059975A1 (de) 2000-12-02 2002-06-06 Bosch Gmbh Robert Handwerkzeugmaschine
DE10065658A1 (de) 2000-12-29 2002-07-18 Bosch Gmbh Robert Getriebevorrichtung mit einem Getriebegehäuse
DE102008059247A1 (de) 2008-11-20 2010-05-27 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
DE102009053614A1 (de) 2009-11-17 2011-05-19 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät

Also Published As

Publication number Publication date
DE102013213124A1 (de) 2015-01-08
US20150017892A1 (en) 2015-01-15
DE202013012223U1 (de) 2015-09-14

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