EP1737595A1 - Manual routing machine - Google Patents

Manual routing machine

Info

Publication number
EP1737595A1
EP1737595A1 EP05708043A EP05708043A EP1737595A1 EP 1737595 A1 EP1737595 A1 EP 1737595A1 EP 05708043 A EP05708043 A EP 05708043A EP 05708043 A EP05708043 A EP 05708043A EP 1737595 A1 EP1737595 A1 EP 1737595A1
Authority
EP
European Patent Office
Prior art keywords
hand
air
housing
router according
turbine wheel
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Withdrawn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
EP05708043A
Other languages
German (de)
French (fr)
Inventor
Wolfgang Hirschburger
Frank Fuchs
Martin Kraus
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 EP1737595A1 publication Critical patent/EP1737595A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/06—Adaptations for driving, or combinations with, hand-held tools or the like control thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C1/00—Milling machines not designed for particular work or special operations
    • B23C1/20—Portable devices or machines; Hand-driven devices or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2230/00—Details of chip evacuation
    • B23C2230/08—Using suction
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/50—Cutting by use of rotating axially moving tool with product handling or receiving means
    • Y10T408/51—Ejector
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30392—Milling with means to protect operative or machine [e.g., guard, safety device, etc.]
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304088—Milling with means to remove chip
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306216—Randomly manipulated, work supported, or work following device
    • Y10T409/306552—Randomly manipulated
    • Y10T409/306608—End mill [e.g., router, etc.]

Definitions

  • the invention relates to a hand router according to the preamble of claim 1.
  • the invention with the features of claim 1 has the advantage that the drive of the hand operated without its own electric motor, only with the suction air of a vacuum cleaner
  • the router has such a high level of efficiency that when conventional vacuum cleaners are connected and when milling, in particular plasterboard, the grinding dust is effectively extracted.
  • a Pelton turbine provided with a guide grille serves as an alternative drive for the hand router, provides a particularly flat drive with improved, adequate performance.
  • the suction air can be discharged with low flow resistance, which increases the efficiency of the turbine
  • the radial or Pelton turbine with a grille has a particularly long service life because the grinding dust does not get to their moving parts and they do not can be affected by the abrasive effect of the grinding dust.
  • the hand router is provided with a radio or infrared switch with which the vacuum cleaner can be switched on and off, the hand router or the vacuum cleaner can be operated easily and conveniently.
  • the housing of the hand router consists of tubular parts that can be connected to each other by means of a flange, makes it particularly dimensionally stable and robust with a low weight.
  • the grip area of the housing carries a transparent sleeve at its lower end, which surrounds the tool, means that milling work can be carried out safely and precisely controlled.
  • the hand router is particularly convenient and easy to control - almost like a writing instrument - in the operating hand.
  • the hand router tends to nestle the underside of the motor housing or a protective ring in the operating hand to support it, the hand router is particularly easy and easy to control. 0 drawing
  • Figure 1 is a spatial side view of a hand router
  • FIG. 2 shows a spatial longitudinal section of the hand router according to FIG. 1
  • Figure 3 shows a longitudinal section of the hand router
  • Figure 4 shows a cross section of the hand router in the handle area
  • Figure 5 shows a cross section of the hand router on the motor housing
  • Figure 6 is a guide grille of the hand router as a detail
  • FIG. 1 shows a hand router 10 with a housing 12, which is configured at the top as a suction nozzle 15 in the form of a slim tubular part, to which a motor housing 13 continues as a thicker, short tubular, flange-mounted part, which is followed by a step-cylinder an elongated, slender tubular part connects below, which serves as a grip area 14.
  • the grip area 14 ends at the bottom on a straight lower edge with an annular bead 20, on which the operating hand can be supported downwards, secured against slipping off when working with the hand router 10.
  • a transparent sleeve 21 emerges from the hollow cylindrical handle area 14, which concentrically engages around a milling cutter 22, which is carried by an output shaft 23, and through which the milling cutter 22 can be easily controlled during cutting operations.
  • the lower edge 40 of the transparent sleeve 21 is not straight, but is embodied in a meandering shape, so that when milling with the lower edge 40 resting on the workpiece, air can always flow into the transparent sleeve 21 and thus the uninterrupted removal of dust is ensured.
  • the output shaft 23 is driven in rotation via a turbine wheel 32, which is designed as a radial or Pelton turbine wheel. It is supported at the bottom inside the handle area 14 in a roller bearing 24 and at the top in the hub 27 of the guide grille 26 in a needle bearing 25.
  • a turbine wheel 32 which is designed as a radial or Pelton turbine wheel. It is supported at the bottom inside the handle area 14 in a roller bearing 24 and at the top in the hub 27 of the guide grille 26 in a needle bearing 25.
  • the drive shaft 23 is rotatably gripped by the turbine wheel 32 in the center and must follow its rotation.
  • the turbine wheel 32 has a bell-shaped outer contour that is narrow, ie. with a small gap, is gripped by a fixed guide vane 30, Via which the inflowing suction air for driving the radial turbine wheel 34 is soothed or disentangled and thus significantly improves the efficiency of the turbine on the input side.
  • the remaining parts of the motor housing 13 encompass the turbine wheel 23 with a narrow one
  • the guide grille 26 is configured in a star shape or in the manner of a wagon wheel, its hub-like shape
  • Center part 27 carries the needle or roller bearing 25 of the output shaft 23 and, starting from it, radially outwardly striving, spoke-like or vanes 28 designed as blades connect the center part 27 to an outer support ring 271. Between the spoke-like air guiding bodies 28 there are spaces 29 for the exit of the used drive air, which is generated by an external vacuum cleaner
  • the air guiding bodies 29 of the guide grille 26 calm the exhaust air emerging axially, vertically upward from the turbine wheel 32, so that it subsequently flows without significant flow losses with minimal turbulence through the aerodynamically designed suction opening 17 and enters a vacuum cleaner hose (not shown) that can be connected to the suction opening 17 , so that the continuous drive of the turbine wheel 34 is secured
  • FIG. 2 shows a sectional illustration of a hand router 10 similar to that of FIG. 1, but without a protective ring 34 and without separate suction openings but with an air duct which leads to direct contact of the turbine with dust-containing air. The following details can be seen more clearly compared to the assembly representation according to FIG. 1:
  • the upper region 15 of the housing 12 serves as a suction nozzle and, with a lateral mushroom-like widening, forms an upper flange 36, which is screwed to the shorter and thicker tubular motor housing 13 by means of flange screws 42.
  • the guide grid 26 is arranged between the housing parts 15, 13 and radially overlapped by them
  • the outer contour of the drive shaft 23 is configured in a central region as an external hexagon 231 and serves for the positive engagement of the turbine wheel 32 adjoining axially below the guide grille 30.
  • the guiding grille 30 concentrically engages around the radial turbine wheel 34 with the drive shaft 23 and. is provided for non-rotatable installation in the tubular motor housing 13. There it directs the air flowing in axially from below radially inward to the center of the turbine wheel 32, where it can do its work with improved efficiency.
  • the guide vane 26 is axially secured against loss at the bottom on the guide vane 30 and is free from play.
  • FIG. 3 shows a further longitudinal section of a hand router 10 in a modified configuration compared to FIGS. 1 and 2.
  • the output shaft 23 has three bearing points. The lowest and middle one of the bearing points 24, 25 is arranged at the bottom or in the middle in the tubular inner GJ house tube 44 and the top one in the hub 27 of the guide grid 26 in a needle bearing 46.
  • the dust-carrying air is combined with the dust-free "used" drive air in the area of the suction opening 17 and fed to the vacuum cleaner. Together Guiding area of the two types of air arranged to calm or swirl the air are not shown.
  • the suction openings 19 on the underside of the motor housing 13 can be seen particularly clearly, the protective ring 34 being embodied as an integrated part in the handle area 14 and unchanged that the suction openings 19 are closed unintentionally by the operating hand if these are too far up the bottom of the motor housing 13 arrives.
  • the protective ring 34 can also be fitted as a separate part in a form-fitting manner into a corresponding annular groove in the grip area 14.
  • Figure 4 shows a cross section of the handle portion 14, which is designed as an outer tube with a central - inner tube 44, which is fixed with spoke-like spacer strips 50 in its radial distance from the outer tube.
  • slot-like or slot-like suction openings 19 can be seen, through which low-dust air is sucked in to drive the turbine wheel 32.
  • FIG. 5 shows a further cross section of the router 10 in the area of the motor housing 13, with air guide bodies 301 of the guide grille 30 and the threaded holes for flange screws 42 which connect the motor housing 13 axially to the handle area 14. Above that, oval bypass openings 48 can be seen, through which the dust-containing air is guided around the turbine wheel 32 to the suction nozzle 15
  • FIG. 6 shows the Nachleitgitter 26 as a detail, the outside of the support ring 260, the regularly arranged spoke-like air guide 28, the spaces 29 and the hub-like central part 27 can be seen
  • a radio or infrared switch which communicates with a counter switch assigned to the vacuum cleaner and with which the vacuum cleaner and thus the handheld power tool can be switched on and off conveniently and is solved inexpensively.
  • a button is arranged in the handle area of the operating hand for gradual opening or Closing a throttle valve provided that can release or stop the suction air flow or. which opens a bypass opening between the turbine and the vacuum cleaner hose and thus reduces the drive energy for operating the turbine wheel

Abstract

The invention relates to a manual routing machine comprising a housing (12) and a tool (22) that is arranged on said housing in a rotationally driven manner, and can be operated, in accordance with requirements, by means of a suction air flow, especially a vacuum cleaner. Said hand routing machine is especially efficient in that a radial turbine wheel (34) comprising front and rear guiding grids (44, 48) is used as a drive. The housing (12) consists of tubular sections (13, 14, 15) that can especially be gripped by a user's hand and can be interconnected by flanges (36, 38).

Description

Hand-OberfräseHand-router
Stand der TechnikState of the art
Die Erfindung bezieht sich auf eine Hand-Oberfräse nach dem Oberbegriff des Anspruchs 1.The invention relates to a hand router according to the preamble of claim 1.
Aus der Patentschrift US 6347985 B 1 ist eine Handwerkzeugmaschine bekannt, die allein über den Saugluftstrom eines Staubsaugers angetrieben wird. Kernstück dieser Handwerkzeugmaschine ist eine herkömmliche Pelton-Turbine, die die Saugluft des Staubsaugers zum Drehen der Abtriebsspindel und damit zum Antrieb des Werkzeugs nutzt.From US Pat. No. 6,347,985 B1 a hand-held power tool is known which is driven solely by the suction air flow of a vacuum cleaner. The centerpiece of this hand tool is a conventional Pelton turbine, which uses the suction air from the vacuum cleaner to turn the output spindle and thus to drive the tool.
Der Wirkungsgrad herkömmlicher Axial- und Peltonturbinen reicht nicht aus, um mit handelsüblichen Staubsaugern die für eine Hand-Ober se benötigte Arbeits- sowie zugleich Absaugleistung zu erbringen.The efficiency of conventional axial and Pelton turbines is not sufficient to provide the work and suction power required for a hand-held vacuum cleaner with commercially available vacuum cleaners.
Vorteile der ErfindungenAdvantages of the inventions
Die Erfindung mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass der Antrieb der ohne eigenen Elektromotor, nur mit der Saugluft eines Staubsaugers betriebenen Hand-The invention with the features of claim 1 has the advantage that the drive of the hand operated without its own electric motor, only with the suction air of a vacuum cleaner
Oberfräse einen so hohen Wirkungsgrad hat, dass beim Anschluss herkömmlicher Staubsauger und beim Fräsen, insbesondere von Gipsplatten, zugleich eine wirksame Absaugung des Schleifstaubs erreicht wird. Dadurch, dass als alternativer Antrieb der Hand-Oberfräse eine mit Vorleitgitter versehene Peltonturbine dient, ist ein besonders flach bauender Antrieb mit verbesserter, ausreichender Leistung bereitgestellt.The router has such a high level of efficiency that when conventional vacuum cleaners are connected and when milling, in particular plasterboard, the grinding dust is effectively extracted. The fact that a Pelton turbine provided with a guide grille serves as an alternative drive for the hand router, provides a particularly flat drive with improved, adequate performance.
Dadurch, dass Vor- und Nachleitgitter in die Gehäusestruktur der Hand-Oberfräse integriert sind, sind deren Herstellungskosten besonders niedrig.The fact that the preliminary and subsequent guide grilles are integrated into the housing structure of the hand router means that their manufacturing costs are particularly low.
Dadurch, dass das Nachleitgitter mit gekrümmten Schaufeln ausgeführt ist, kann die Saugluft mit geringem Strömungswiderstand abgeführt werden, wodurch der Wirkungs- grad der Turbine erhöht wirdBecause the guide vane is designed with curved blades, the suction air can be discharged with low flow resistance, which increases the efficiency of the turbine
Dadurch, dass das Nachleitgitter als Halterung des oberen Lagers des Turbinenrades dient, ist die Funktion zweiter Bauteile in einem einzigen Bauteil zusammengefasst.The fact that the guide vane serves as a holder for the upper bearing of the turbine wheel means that the function of two components is combined in a single component.
Dadurch, dass der Antrieb im wesentlichen aus Kunststoffteilen besteht, ist die Hand-Because the drive essentially consists of plastic parts, the manual
Oberfräse besonders leicht und handlich.Router particularly light and handy.
Dadurch, dass der Saugluftstrom für den Antrieb der Radial- oder Peltonturbine vom Luftstrom für die Absaugung des Schleifstaubes getrennt ist, hat die Radial- oder Pelton- turbine mit Vorleitgitter eine besonders lange Lebensdauer, weil der Schleifstaub nicht an deren bewegte Teile gelangt und diese nicht durch die abrasive Wirkung des Schleif- staubs beeinträchtigt werden.Because the suction air flow for driving the radial or Pelton turbine is separated from the air flow for extracting the grinding dust, the radial or Pelton turbine with a grille has a particularly long service life because the grinding dust does not get to their moving parts and they do not can be affected by the abrasive effect of the grinding dust.
Dadurch, dass die Antriebsluft für die Turbine aus Seitenschlitzen angesaugt wird, die oben am Gehäusen, weit entfernt von der Schleifstaubbildung angeordnet sind, wird die zum Turbinenrad und den bewegten Teilen bzw. deren Lagerstellen gelangende Schleif- staübmenge äußerst gering gehalten.The fact that the drive air for the turbine is sucked in from side slots which are arranged at the top of the housing, far away from the formation of grinding dust, keeps the amount of grinding dust reaching the turbine wheel and the moving parts or their bearings extremely low.
Dadurch, dass die Hand-Oberfräse mit einem Funk-oder Infrarotschalter versehen ist, mit dem der Staubsauger ein- und ausschaltbar ist, ist eine bequeme und einfache Bedienung der Hand-Oberfräse bzw. des Staubsaugers möglich.Because the hand router is provided with a radio or infrared switch with which the vacuum cleaner can be switched on and off, the hand router or the vacuum cleaner can be operated easily and conveniently.
Dadurch, dass die Drehzahlregelung für die Hand-Oberfräse einer unterschiedlich einstellbaren Luftklappe vorgenommen wird, ist mit einfachen Mitteln eine Anpassung der Werkzeugdrehzahl an jeweils vorliegende Arbeitsbedingungen einfach und kostengünstig möglich.The fact that the speed control for the hand router of a differently adjustable air flap is carried out makes it easy to adapt the Tool speed is easily and inexpensively possible for the respective working conditions.
Dadurch, dass das Gehäuse der Hand-Oberfräse aus rohrartigen, miteinander über Flan- 5 sehe verbiridbaren Teilen besteht, ist es bei geringem Eigengewicht besonders formsteif und robust.The fact that the housing of the hand router consists of tubular parts that can be connected to each other by means of a flange, makes it particularly dimensionally stable and robust with a low weight.
Dadurch, dass der Griffbereich des Gehäuses an seinem unteren Ende eine Klarsichthülse trägt, die das Werkzeug umgreift, können damit Fräsarbeiten sicher und genau kontrol- L 0 lierbar durchgeführt werden.The fact that the grip area of the housing carries a transparent sleeve at its lower end, which surrounds the tool, means that milling work can be carried out safely and precisely controlled.
Dadurch, dass die Unterkante der Klarsichthülse mäanderförmig verläuft, kann von außerhalb der Klarsichthülse stets Luft angesaugt werden, die dem ununterbrochenen Staύbabtransport unmittelbar am Werkzeug dient und dafür sorgt, dass kein Frässtaub in L5 die Umgebungsluft des Bedienenden gelangt.Because the lower edge of the transparent sleeve is meandering, air can always be sucked in from outside the transparent sleeve, which serves for the uninterrupted removal of dust directly on the tool and ensures that no milling dust in L5 gets into the ambient air of the operator.
Dadurch, dass der Griffbereich des Gehäuses unterhalb der Einsaugöffhungen einen Schutzxing trägt, wird verhindert, dass die Einsaugöflhungen ungewollt durch die Bedienhand beim Hantieren mit der Oberfräse verschlossen werden und damit die Leistung 20 der Maschine beeinträchtigt wird "**'The fact that the grip area of the housing beneath the suction openings has a protective xing prevents the suction openings from being closed unintentionally by the operating hand when handling the router and thus impairing the performance 20 of the machine " ** '
Dadurch, dass der Durchmesser des Grifibereichs dem eines Staubsaugerschlauchs entspricht, ist die Hand-Oberfräse besonders bequem und gut kontrollierbar-nahezu wie ein Schreibgerät-in der Bedienhand zu führen.Because the diameter of the grip area corresponds to that of a vacuum cleaner hose, the hand router is particularly convenient and easy to control - almost like a writing instrument - in the operating hand.
25 Dadurch, dass sich in Arbeitsposition der Hand-Oberfräse die Unterseite des Motorgehäuses bzw. einen Schutzring abstützend in die Bedienhand schmiegt, ist die Hand- Oberfräse besonders bequem und gut kontrollierbar zu fuhren. 0 Zeichnung25 Because the hand router tends to nestle the underside of the motor housing or a protective ring in the operating hand to support it, the hand router is particularly easy and easy to control. 0 drawing
Nachstehend wird die vorliegende Erfindung anhand eines Ausführungsbeispiels mit zugehöriger Zeichnung näher erläutert. Es zeigen:The present invention is explained in more detail below on the basis of an exemplary embodiment with the associated drawing. Show it:
Figur 1 eine räumliche Seitenansicht einer Hand-OberfräseFigure 1 is a spatial side view of a hand router
Figur 2 einen räumlichen Längsschnitt der Hand-Oberfräse nach Figur 1FIG. 2 shows a spatial longitudinal section of the hand router according to FIG. 1
Figur 3 einen Längsschnitt der Hand-OberfräseFigure 3 shows a longitudinal section of the hand router
Figur 4 einen Querschnitt der Hand-Oberfräse im Griff bereichFigure 4 shows a cross section of the hand router in the handle area
Figur 5 einen Querschnitt der Hand-Oberfräse an MotorgehäuseFigure 5 shows a cross section of the hand router on the motor housing
Figur 6 ein Nachleitgitter der Hand-Oberfräse als EinzelheitFigure 6 is a guide grille of the hand router as a detail
Beschreibung des AusführungsbeispielsDescription of the embodiment
Figur 1 zeigt eine Hand-Oberfräse 10 mit einem Gehäuse 12, das oben als Absaugstutzen 15 in Form eines schlanken rohrfδrmigen Teils ausgestaltet ist, an den sich nach unten stufenzylindrisch ein Motorgehäuse 13 als dickeres, kurzes rohrförmiges, anflanschbares Teil fortsetzt, an das sich nach unten ein längliches schlankes rohrarliges Teil anschließt, das als Griffbereich 14 dient. Der Griffbereich 14 endet unten an einer geraden Unterkante mit einem Ringwulst 20, an dem sich die Bedienhand nach unten, gegen Abrutschen gesichert beim Arbeiten mit der Hand-Oberfräse 10 abstützen kann.FIG. 1 shows a hand router 10 with a housing 12, which is configured at the top as a suction nozzle 15 in the form of a slim tubular part, to which a motor housing 13 continues as a thicker, short tubular, flange-mounted part, which is followed by a step-cylinder an elongated, slender tubular part connects below, which serves as a grip area 14. The grip area 14 ends at the bottom on a straight lower edge with an annular bead 20, on which the operating hand can be supported downwards, secured against slipping off when working with the hand router 10.
Aus dem hohlzylindrischen Griff bereich 14 tritt unten eine Klarsichthülse 21 aus, die ei- nen Fräser 22, der von einer Abtriebswelle 23 getragen wird, konzentrisch umgreift und durch die hindurch der Fräser 22 bei Schneid arbeiten gut kontrollierbar ist. Die Unterkante 40 der Klarsichthülse 21 ist nicht gerade, sondern mäanderförmig ausgeführt, so dass beim Fräsen mit auf dem Werkstück aufsitzender Unterkante 40 stets Luft in die Klarsichthülse 21 nachfließen kann und damit der ununterbrochene Staubabtransport ge- sichert ist.A transparent sleeve 21 emerges from the hollow cylindrical handle area 14, which concentrically engages around a milling cutter 22, which is carried by an output shaft 23, and through which the milling cutter 22 can be easily controlled during cutting operations. The lower edge 40 of the transparent sleeve 21 is not straight, but is embodied in a meandering shape, so that when milling with the lower edge 40 resting on the workpiece, air can always flow into the transparent sleeve 21 and thus the uninterrupted removal of dust is ensured.
Die Abtriebswelle 23 wird über ein Turbinenrad 32, dass als Radial-oder Peltonturbinen- rad ausgestaltet ist, drehend angetrieben. Sie ist unten im Inneren des Griffbereichs 14 in einem Wälzlager 24 und oben in der Nabe 27 des Nachleitgitters 26 in einen Nadellager 25 gelagert.The output shaft 23 is driven in rotation via a turbine wheel 32, which is designed as a radial or Pelton turbine wheel. It is supported at the bottom inside the handle area 14 in a roller bearing 24 and at the top in the hub 27 of the guide grille 26 in a needle bearing 25.
Die Antriebswelle 23 wird vom Turbinenrad 32 mittig drehfest umgriffen und muss dessen Drehung folgen. Das Turbinenrad 32 hat eine glockenförmige Außenkontur, die eng, dh. mit einem kleinen Spalt, von einem feststehenden Vorleitgitter 30 umgriffen wird, über das die einströmende Saugluft zum Antrieb des Radialturbinenrades 34 beruhigt bzw. entwirbelt wird und damit eingangsseitig den Wirkungsgrad der Turbine erheblich verbessert.The drive shaft 23 is rotatably gripped by the turbine wheel 32 in the center and must follow its rotation. The turbine wheel 32 has a bell-shaped outer contour that is narrow, ie. with a small gap, is gripped by a fixed guide vane 30, Via which the inflowing suction air for driving the radial turbine wheel 34 is soothed or disentangled and thus significantly improves the efficiency of the turbine on the input side.
Die übrigen Teile des Motorgehäuses 13 umgreifen das Turbinenrad 23 mit einem engenThe remaining parts of the motor housing 13 encompass the turbine wheel 23 with a narrow one
Spalt, der oben, am axialen Ende des Turbinenrads 23 in eine geradeaus nach oben führende Absaugöflhung 17 übergeht. An deren Beginn stützt sich das obere Ende des Turbinenrades 23 gemeinsam mit der Abtriebswelle 23 axial an einem Nachleitgitter 26 ab, das als Lagersitz des oberen Wälzlagers 25 der Abtriebswelle 23 dient. Dazu ist das Nachleitgitter 26 sternförmig bzw. wagenradartig ausgestaltet, wobei dessen näbenartigerGap that merges at the top, at the axial end of the turbine wheel 23, into a suction opening 17 leading straight upwards. At the beginning, the upper end of the turbine wheel 23, together with the output shaft 23, is axially supported on a guide grille 26, which serves as the bearing seat of the upper roller bearing 25 of the output shaft 23. For this purpose, the guide grille 26 is configured in a star shape or in the manner of a wagon wheel, its hub-like shape
Mittenteil 27 das Nadel- bzw. Wälzlager 25 der Abtriebswelle 23 trägt und von ihm ausgehend radial nach außen strebende, speichenartige bzw. als Schaufeln ausgestaltete Luftleitkörper 28 das Mittenteil 27 mit einem äußeren Tragring 271 verbinden. Zwischen den speichenartigen Luflleitkörpern 28 befinden sich Zwischenräumen 29 zum Austritt der verbrauchten Antriebsluft, die von einem externen Staubsauger erzeugt wirdCenter part 27 carries the needle or roller bearing 25 of the output shaft 23 and, starting from it, radially outwardly striving, spoke-like or vanes 28 designed as blades connect the center part 27 to an outer support ring 271. Between the spoke-like air guiding bodies 28 there are spaces 29 for the exit of the used drive air, which is generated by an external vacuum cleaner
Die Luftleitkörper 29 des Nachleitgitters 26 beruhigen die axial, senkrecht nach oben aus dem Turbinenrad 32 austretende Abluft, so dass diese anschließend ohne wesentliche Strömungsverluste mit minimalen Verwirbelungen durch die strömungsgünstig gestaltete Absaugöflhung 17 fließt und in einen an die Absaugööhung 17 anschließbaren, nicht dargestellten Staubsaugerschlauch tritt, damit der kontinuierliche Antrieb des Turbinenrades 34 gesichert istThe air guiding bodies 29 of the guide grille 26 calm the exhaust air emerging axially, vertically upward from the turbine wheel 32, so that it subsequently flows without significant flow losses with minimal turbulence through the aerodynamically designed suction opening 17 and enters a vacuum cleaner hose (not shown) that can be connected to the suction opening 17 , so that the continuous drive of the turbine wheel 34 is secured
Zum Betreiben der Hand-Oberfräse 10 strömt Luft durch die Einsaugöflhungen 19 an der Unterseite das Motorgehäuses 13 hindurch über das Vorleitgitter 30 zum Turbinenrad 32, zum Nachleitgitter 26, bevor sie sich mit der staubhaltigen Staubäbsaugluft vermischt. Die Staubäbsaugluft, die den aus dem Schnittkanal des Fräsers 22 herausgeschleuderten Staub abtransportiert, wird über Bypass Kanäle 48 um das Turbinenrad 32, ohne dieses zu berühren herum zur Absaugöflhung 17 geführt und von dort über den Staubsauger- schlauch in einen nicht dargestellten Staubbehälter transportiert.To operate the hand router 10, air flows through the intake openings 19 on the underside of the motor housing 13, through the guide grille 30 to the turbine wheel 32, to the guide grille 26, before it mixes with the dust-containing dust extraction air. The dust extraction air, which transports the dust thrown out of the cutting channel of the milling cutter 22, is guided via bypass channels 48 around the turbine wheel 32 without touching it to the suction opening 17 and from there it is transported via the vacuum cleaner hose into a dust container (not shown).
Die Trennung des Turbinenrads 32 von staubhaltiger Luft wirkt einen Abschleif- und Anlagerungseffekt entgegen, der die Leistung der Radialturbine und deren Lebensdauer verringern würde. Figur 2 zeigt eine Schnittdarstellung einer Hand-Oberfräse 10 ähnlich der der Figur 1, allerdings ohne Schutzring 34 und ohne gesonderte Einsaugöflhungen aber mit einer Luftführung, die zu einem direkten Kontakt der Turbine mit staübhaltiger Luft führt. Darin sind folgende Einzelheiten gegenüber der Zusammenbaudarstellung gemäß Figur 1 deutlicher erkennbar:The separation of the turbine wheel 32 from dusty air counteracts a grinding and attachment effect that would reduce the performance and life of the radial turbine. FIG. 2 shows a sectional illustration of a hand router 10 similar to that of FIG. 1, but without a protective ring 34 and without separate suction openings but with an air duct which leads to direct contact of the turbine with dust-containing air. The following details can be seen more clearly compared to the assembly representation according to FIG. 1:
Der obere Bereich 15 des Gehäuses 12 dient als Absaugstutzen und bildet mit einer seitlichen pilzkopfartigen Verbreiterung einen oberen Flansch 36 , der mit dem kürzeren und dickeren rohrartigen Motorgehäuse 13 mittels Flanschschrauben 42 verschraübt ist. Zwischen den Gehäuseteilen 15, 13 und von diesen radial übergriffen ist das Nachleitgitter 26 angeordnetThe upper region 15 of the housing 12 serves as a suction nozzle and, with a lateral mushroom-like widening, forms an upper flange 36, which is screwed to the shorter and thicker tubular motor housing 13 by means of flange screws 42. The guide grid 26 is arranged between the housing parts 15, 13 and radially overlapped by them
Die Außenkontur der Antriebswelle 23 ist in einem mittleren Bereich als Außensechskant 231 ausgestaltet und dient dem formschlüssigen Eingriff des sich axial unterhalb des Vorleitgitter-» 30 anschließenden Turbinenrades 32.The outer contour of the drive shaft 23 is configured in a central region as an external hexagon 231 and serves for the positive engagement of the turbine wheel 32 adjoining axially below the guide grille 30.
Das Vorleitgitter 30 umgreift das Radialturbinenrad 34 mit der Antriebswelle 23 konzentrisch und. ist zum drehfesten Einbau in das rohrartige Motorgehäuse 13 vorgesehen. Dort lenkt es die axial von unten nachströmende Luft radial nach innen zur Mitte des Turbinenrads 32, wo sie ihre Arbeit mit verbessertem Wirkungsgrad verrichten kann.The guiding grille 30 concentrically engages around the radial turbine wheel 34 with the drive shaft 23 and. is provided for non-rotatable installation in the tubular motor housing 13. There it directs the air flowing in axially from below radially inward to the center of the turbine wheel 32, where it can do its work with improved efficiency.
Innerhalb der Gehäuseteile 15, 13 stützt sich das Nachleitgitter 26 unten am Vorleitgitter 30 axial gegen Verlieren gesichert und spielfrei ab.Within the housing parts 15, 13, the guide vane 26 is axially secured against loss at the bottom on the guide vane 30 and is free from play.
Figur 3 zeigt eine weitere Längsschnitt einer Hand-Oberfräse 10 in gegenüber den Figur- ne 1 und 2 modifizierter Ausgestaltung. Im Unterschied zur Ausgestaltung der Hand- Oberfräse nach Figur 1 und 2 weist die Abtriebswelle 23 drei Lagerstellen auf. Die unterste und mittlerer der Lagerstellen 24, 25 ist unten bzw. in der Mitte im rohrförmigen inneren GJ-ehäuserohr 44 angeordnet und die oberste in der Nabe 27 des Nachleitgitters 26 in einem Nadellager 46.FIG. 3 shows a further longitudinal section of a hand router 10 in a modified configuration compared to FIGS. 1 and 2. In contrast to the design of the hand router according to FIGS. 1 and 2, the output shaft 23 has three bearing points. The lowest and middle one of the bearing points 24, 25 is arranged at the bottom or in the middle in the tubular inner GJ house tube 44 and the top one in the hub 27 of the guide grid 26 in a needle bearing 46.
Die staübtragende Luft wird mit der staubfreien " verbrauchten " Antriebsluft in Bereich der Absaugöflhung 17 zusammengeführt und dem Staubsauger zugeleitet. Im Zusammen- führungsbereich der beiden Luftarten angeordnete Strömungsmittel zur Beruhigung bzw. Entwirbelung der Luft sind nicht mit dargestellt.The dust-carrying air is combined with the dust-free "used" drive air in the area of the suction opening 17 and fed to the vacuum cleaner. Together Guiding area of the two types of air arranged to calm or swirl the air are not shown.
Besonders deutlich ist die Einsaugöflhungen 19 an der Unterseite das Motorgehäuses 13 zu erkennen, wobei der Schutzring 34 als in den Griff bereich 14 integriertes Teil ausgeführt ist und unverändert, dass die Einsaugöflhungen 19 durch die Bedienhand ungewollten verschlossen werden, wenn diese zu weit nach oben an die Unterseite das Motorgehäuses 13 gelangt. Der Schutzring 34 kann auch als gesondertes Teil formschlüssig in eine entsprechende Ringnut des Griffbereich 14 eingepasst sein.The suction openings 19 on the underside of the motor housing 13 can be seen particularly clearly, the protective ring 34 being embodied as an integrated part in the handle area 14 and unchanged that the suction openings 19 are closed unintentionally by the operating hand if these are too far up the bottom of the motor housing 13 arrives. The protective ring 34 can also be fitted as a separate part in a form-fitting manner into a corresponding annular groove in the grip area 14.
Figur 4 zeigt einen Querschnitt des Griff bereichs 14, der als Außenrohr mit einem zentralen --nnenrohr 44 ausgestaltet ist, das mit speichenartigen Abstandsleisten 50 in seinem radialen Abstand zum Außenrohr festgelegt ist.Figure 4 shows a cross section of the handle portion 14, which is designed as an outer tube with a central - inner tube 44, which is fixed with spoke-like spacer strips 50 in its radial distance from the outer tube.
An der Unterseite das Motorgehäuses 13 sind schlitzartige bzw. langlochartige Einsaugöflhungen 19 erkennbar, durch die staubarme Luft zum Antrieb des Turbinenrads 32 angesaugt wird.On the underside of the motor housing 13, slot-like or slot-like suction openings 19 can be seen, through which low-dust air is sucked in to drive the turbine wheel 32.
Figur 5 zeigt einen weiteren Querschnitt der Oberfräse 10 im Bereich das Motorgehäuses 13, wobei Lufüeitkörper 301 des Vorleitgitters 30 und die Gewindelöcher für Flanschsschrauben 42 erkennbar, die das Motorgehäuse 13 axial mit dem Griff bereich 14 verbinden. Darüberbinaus sind ovale Bypassöflhungen 48 erkennbar, durch die hindurch die staubhaltige Luft um das Turbinenrad 32 herum zum Absaugstutzen 15 geführt wirdFIG. 5 shows a further cross section of the router 10 in the area of the motor housing 13, with air guide bodies 301 of the guide grille 30 and the threaded holes for flange screws 42 which connect the motor housing 13 axially to the handle area 14. Above that, oval bypass openings 48 can be seen, through which the dust-containing air is guided around the turbine wheel 32 to the suction nozzle 15
Figur 6 zeigt das Nachleitgitter 26 als Einzelheit, wobei außen der Tragring 260, die regelmäßig angeordneten speichenartigen Luftleitkörper 28, die Zwischenräume 29 und das nabenartige Mittenteil 27 erkennbar sindFigure 6 shows the Nachleitgitter 26 as a detail, the outside of the support ring 260, the regularly arranged spoke-like air guide 28, the spaces 29 and the hub-like central part 27 can be seen
Bei einem nicht dargestellten Ausführungsbeispiel der Hand-Oberfräse - ähnlich den vor- hergehenden Ausführungsbeispielen - trägt deren Gehäuse einen Funk-oder Infrarotschalter, der mit einem dem Staubsauger zugeordneten Gegenschalter kommuniziert und mit dem das Ein-und Ausschalten des Staubsaugers und damit der Handwerkzeugmaschine bequem und kostengünstig gelöst ist. Weiter ist zur Drehzahl- bzw. Leistungsregelung eine im Griffbereich der Bedienhand angeordnetet Taste zum graduellen Öffnen bzw. Schließen einer Drosselklappe vorgesehen, die den Saugluftstrom freigeben oder stoppen kann bzrw. die eine Bypass-Öflhung zwischen der Turbine und dem Staubsaugerschlauch öffnet und damit die Antriebsenergie zum Betreiben des Turbinenrades verringer In an embodiment of the hand router, not shown - similar to the previous embodiments - its housing carries a radio or infrared switch which communicates with a counter switch assigned to the vacuum cleaner and with which the vacuum cleaner and thus the handheld power tool can be switched on and off conveniently and is solved inexpensively. For speed and power control, a button is arranged in the handle area of the operating hand for gradual opening or Closing a throttle valve provided that can release or stop the suction air flow or. which opens a bypass opening between the turbine and the vacuum cleaner hose and thus reduces the drive energy for operating the turbine wheel

Claims

Ansprüche Expectations
1. Hand-Oberf äse (10) mit einem Gehäuse (12) und einem daran drehend antreibbar angeordneten Werkzeug (22), das mittels eines Saugluftstromes, insbesondere über einen Staubsauger, bestimmungsgemäß betreibbar ist, dadurch gekennzeichnet, dass als Antrieb eine saugluftbetreibbare Turbine mit Radial- oder Peltonturbinenrad (32) dient, die mit Mitteln zum Beruhigen der ein- bzw. ausströmenden Luft, inbesondere Vor- und Nachleitgitter (30, 26), versehen ist, wobei das Gehäuse (12) aus mehreren rohrartigen Teilen (13, 14, 15) besteht, die über Flansche (36, 38) axial miteinander verbindbar sind.1. hand-held bevel (10) with a housing (12) and a tool (22) arranged to be rotatably drivable thereon, which can be operated as intended by means of a suction air stream, in particular via a vacuum cleaner, characterized in that a suction air-operated turbine is used as the drive Radial or Pelton turbine wheel (32) is used, which is provided with means for calming the inflowing or outflowing air, in particular pre-and post-grille (30, 26), the housing (12) consisting of several tubular parts (13, 14 , 15), which can be connected axially to one another via flanges (36, 38).
2. Hand-Oberfräse nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (12) im unteren Bereich (14) das Werkzeug (22) konzentrisch umgreift.2. Hand router according to claim 1, characterized in that the housing (12) concentrically engages around the tool (22) in the lower region (14).
3. Hand-Oberfräse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Nachleit- gitter (26) Luftleitkörper (28) aufweist, die als gekrümmte Schaufeln ausgestaltet -• sind3. Hand router according to claim 1 or 2, characterized in that the guide vane (26) has air guide bodies (28) which are designed as curved blades - •
4. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Nachleitgitter (26) als Lagersitz für das Turbinenrad (32) dient.4. Hand router according to one of the preceding claims, characterized in that the guide vane (26) serves as a bearing seat for the turbine wheel (32).
5. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Vorleitgitter (30) und das Nachleitgitter (26) in die Struktur des Motorgehäuses (13) versteifend eingebaut sind5. Hand router according to one of the preceding claims, characterized in that the guide grille (30) and the guide grille (26) are stiffened in the structure of the motor housing (13)
6. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der aus staubarmer Luft bestehende Saugluftstrom zum Antrieb des Turbinenrades (32) von einem Staubluftstrom getrennt geführt ist, so dass staubhaltige, von einem Werkstück abgesaugte Luft nicht in Berührung mit bewegten und/oder die Antriebsluft leitenden Teilen der Handwerkzeugmaschine gelangt. 6. Hand router according to one of the preceding claims, characterized in that the suction air flow consisting of low-dust air for driving the turbine wheel (32) is guided separately from a dust air flow, so that dust-containing air extracted from a workpiece is not in contact with moving and / or the drive air-conducting parts of the hand tool arrive.
7. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Luft zum Antrieb des Turbinenrads (32) über Lufteinströmöffnungen (60) in das Gehäuse (12) eintritt, die weit oberhalb des Werkzeugs (22) angeordnet sind7. Hand router according to one of the preceding claims, characterized in that the air for driving the turbine wheel (32) enters the housing (12) via air inflow openings (60) which are arranged far above the tool (22)
8. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (12) einen Funkschalter trägt, mit dem ein dem Staubsauger ein- bzw. ausschaltender Gegenschalter betätigbar ist und damit zugleich die Hand- Werkzeugmaschine ein- bzw. ausschaltbar ist.8. Hand router according to one of the preceding claims, characterized in that the housing (12) carries a radio switch with which a counter switch which switches the vacuum cleaner on or off can be actuated and thus at the same time the hand-held machine tool can be switched on or off ,
9. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Schalter zur Drehzahleinstellung aufweist, insbesondere als mit einer im Saugluftstrom angeordneten Drosselklappe gekoppelte Bedientaste.9. Hand router according to one of the preceding claims, characterized in that it has a switch for setting the speed, in particular as a control button coupled to a throttle valve arranged in the suction air flow.
10. Hand-Oberfräse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Durchmesser des Griffbereichs (14) dem eines Staubsaugerschlauchs entspricht. 10. Hand router according to one of the preceding claims, characterized in that the diameter of the handle region (14) corresponds to that of a vacuum cleaner hose.
EP05708043A 2004-03-30 2005-02-21 Manual routing machine Withdrawn EP1737595A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004016172A DE102004016172A1 (en) 2004-03-30 2004-03-30 Hand-router
PCT/EP2005/050741 WO2005095036A1 (en) 2004-03-30 2005-02-21 Manual routing machine

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EP1737595A1 true EP1737595A1 (en) 2007-01-03

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CN (1) CN100462170C (en)
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CN1938118A (en) 2007-03-28
DE102004016172A1 (en) 2005-10-20
CN100462170C (en) 2009-02-18
US7455088B2 (en) 2008-11-25
US20060251485A1 (en) 2006-11-09

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