EP2268450A1 - Hand-held machine tool, in particular hand-guided grinding machine - Google Patents

Hand-held machine tool, in particular hand-guided grinding machine

Info

Publication number
EP2268450A1
EP2268450A1 EP08873426A EP08873426A EP2268450A1 EP 2268450 A1 EP2268450 A1 EP 2268450A1 EP 08873426 A EP08873426 A EP 08873426A EP 08873426 A EP08873426 A EP 08873426A EP 2268450 A1 EP2268450 A1 EP 2268450A1
Authority
EP
European Patent Office
Prior art keywords
housing
receiving
hand tool
tool according
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08873426A
Other languages
German (de)
French (fr)
Other versions
EP2268450B1 (en
Inventor
Balazs Bogardi
Roland Kaplar
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 EP2268450A1 publication Critical patent/EP2268450A1/en
Application granted granted Critical
Publication of EP2268450B1 publication Critical patent/EP2268450B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • 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

Definitions

  • Hand tool in particular hand-guided grinding machine
  • the invention relates to a hand tool, in particular a hand-held grinding machine such as an angle grinder.
  • an angle grinder which has in a housing a drive motor for the rotatable drive of a tool receiving shaft.
  • the housing of the power tool is subject to mechanical stresses that come during operation of the vibrations of the drive motor or the tool and the contact between the tool and the workpiece to be machined. The loads acting on the housing in this case may not lead to failure over the life of the power tool.
  • the hand tool including the housing, must be easy and trouble-free to install.
  • the invention is based on the object to simplify the installation of a hand tool and at the same time to ensure a high stability, in particular of the housing of the power tool. This object is achieved with the features of claim 1.
  • the dependent claims indicate expedient developments.
  • the hand tool according to the invention which is in particular a hand-held grinding machine such as an angle grinder, has an at least two-part housing, the two housing parts are to be connected to each other via a connecting device.
  • the connecting device is designed as a plug connection and has a receiving groove on a housing part and a projection engaging in the receiving groove on the other housing part.
  • the groove walls delimiting the receiving groove in this case extend in the mounting direction of the housing parts, ie in the insertion direction of the projection into the receiving groove.
  • This embodiment is characterized by a high stability, since the groove walls, the two housing parts in the transverse direction, i. Stabilize transversely to the mounting or insertion direction. Vibrations and other stresses that occur during operation, therefore, do not lead to a loosening of the connection between the two housing parts. Even in plug-in or mounting direction, a secure connection can be realized, since only a tensile force between the housing parts must be generated, for example via an additional screw to hold the two housing parts together securely; additional adjusting or stabilizing devices for securing the desired mounting position of the two housing parts relative to each other are not required.
  • the final assembly position in Lateral- and longitudinal direction is achieved by inserting the projection in the receiving groove.
  • the improved stability is accompanied by a simplified assembly and the possibility of disassembly, for example, for maintenance purposes.
  • the housing parts are over the
  • connection device connected to each other and can by releasing the connecting device for maintenance purposes again be solved from each other.
  • the division of the housing allows optimum structural adaptation of the respective housing part to the intended use, for example with regard to the choice of material. So it may be useful as housing parts, a motor housing for receiving the drive motor and a
  • Execute gear housing for receiving the tool shaft wherein the motor housing made of a plastic and the gear housing made of a light metal, for example, may consist of aluminum.
  • the connection via groove and projection can be easily realized even with different materials for the housing parts.
  • one of the groove walls of the receiving groove is formed by the outer wall of the relevant housing part.
  • Stabilization section overlapped, which is arranged on the other housing part adjacent to the projection.
  • This stabilizing section has a to the front of the
  • Stabilization section provides additional stability, especially in the transverse direction.
  • Insert housing cutout which is associated with a corresponding housing projection on the other housing part, wherein protrudes in the assembled position of the housing projection in the housing cutout.
  • This housing cutout is formed, for example, part-circular and is conveniently in the mounting or insertion, it thus runs parallel to the engaging in the receiving projection.
  • a receiving cylinder is arranged on a housing part, which serves to receive a connecting screw, wherein the receiving cylinder is associated with a connecting opening on the other housing part through which the connecting screw is passed.
  • the receiving cylinder takes on the threaded portion of the connecting screw.
  • the two housing parts to be connected are, for example, a motor housing for receiving a drive motor and a gear housing for receiving a tool shaft for driving the tool.
  • the receiving cylinder for receiving the connecting screw is preferably formed in this embodiment on the plastic motor housing, which can preferably be produced by plastic injection molding.
  • the light-metal gearbox requires no such receiving cylinder, but only the
  • the connector is expediently offset radially to a drive shaft of the drive motor receiving passage opening in the housing parts.
  • two connectors are provided, each located at a radial distance to the passage opening and in
  • the connectors positioned on both sides ensure that the housing parts are aligned in the desired position axially to each other, so that the drive shaft of the drive motor can be stored without play.
  • the passage opening between the housing parts is advantageously the seat of a bearing for rotatably receiving the drive shaft.
  • 1 is a sectional view of a designed as angle grinder hand tool with a motor housing for receiving the drive motor and a gear housing for receiving the tool shaft,
  • Fig. 2 is a perspective view of the individual
  • Transmission housing with lateral grooves, which serve to receive a corresponding projection on the motor housing and at a radial distance to a passage opening for the drive shaft of the
  • FIG. 5 is a representation corresponding to FIG. 4, but from a different perspective
  • Fig. 7 gear and motor housing from a different perspective
  • 8 shows gearbox and motor housing from yet another perspective
  • the hand-held grinding machine illustrated in FIG. 1 is an angle grinder with a two-part housing, comprising a motor housing 2 for receiving an electric drive motor 4 and a transmission housing 3 for receiving and supporting a tool shaft 7, which carries a tool 8, wherein the tool shaft 7 in a
  • Bearing flange 9 is rotatably mounted in the gear housing 3 and the tool 8 is overlapped by a protective hood 10.
  • the motor housing 2 is made of plastic and is conveniently prepared by plastic injection molding.
  • the transmission housing 3 is preferably made of light metal, for example aluminum and is produced as a casting.
  • a transmission 6 is arranged, via which the rotational movement of an armature or drive shaft 5 of the drive motor 4 is transmitted to the tool shaft 7.
  • a passage piece 12 with a central passage opening 11 for receiving and supporting the armature or drive shaft 5 of the drive motor is introduced into the gearbox housing on the side facing the motor housing.
  • a bearing can be used for rotatably supporting the shaft fifth
  • the receiving groove 14 is part of a plug connection, via which the transmission housing is to be connected to the motor housing.
  • a projection on the motor housing is inserted in the mounted position.
  • the receiving groove 14 is bounded by an inner groove wall 15 and an outer groove wall, wherein the outer groove wall is identical to the outer wall 13 of the transmission housing 3.
  • the receiving groove 14 and the inner groove wall 15 extend to the radial inner side in the direction of the housing interior.
  • the insertion in the receiving groove 14 is in the axial direction of the passage opening 11, which also indicates the mounting direction, in which the motor housing and the gear housing are interconnected.
  • a partially circular housing cutout 17 is introduced, which also extends in the mounting or insertion.
  • Housing cutout 17 serves to receive a corresponding housing projection on the other housing part 2.
  • the receiving groove 14 is located in the immediate vicinity of the housing cutout 17.
  • an axially projecting projection 19 is formed on the motor housing 2, the wall thickness of which is attached to the groove width of the receiving groove in the gear housing 3.
  • the front side of the projection 19 protrudes in the mounted position in the receiving groove.
  • the projection 19 is located at a part-circular housing projection 18 which is associated with the likewise part-circular housing cutout 17 in the transmission housing 3.
  • two stabilizing portions 20 are formed, which engage over the end face of the inner groove wall 15 (FIG. 2), for which purpose a recess 21 is made in the stabilizing portions 20.
  • the projection which is disposed immediately adjacent to the housing projection 18.
  • one or more receiving cylinders 22, which are assigned to the connecting openings 16 and serve to receive the threaded portion of a connecting screw, which is guided through the connecting opening 16, are embodied integrally with the motor housing 2.
  • two substantially hollow cylindrical cross-connection sections 23 can be seen from FIG. 8, which are formed integrally with the motor housing and serve to connect two motor housing parts 2a and 2b shown in FIG. 9, from which the motor housing is constructed.
  • the cross-connection sections 23 extend in the transverse direction, ie transversely to the axis or mounting direction between the engine and transmission housing.

Abstract

A hand-held machine tool comprises a split housing, the two parts of which are to be connected by means of a connecting device that is designed as a plug-in connection and has a receiving groove on one housing part and a projection on the other housing part.

Description

BeSchreibungDescription
Titeltitle
Handwerkzeugmaschine, insbesondere handgeführte SchleifmaschineHand tool, in particular hand-guided grinding machine
Die Erfindung bezieht sich auf eine Handwerkzeugmaschine, insbesondere eine handgeführte Schleifmaschine wie beispielsweise einen Winkelschleifer.The invention relates to a hand tool, in particular a hand-held grinding machine such as an angle grinder.
Stand der TechnikState of the art
In der EP 0 583 270 Bl wird ein Winkelschleifer beschrieben, der in einem Gehäuse einen Antriebsmotor zum drehbaren Antrieb einer ein Werkzeug aufnehmenden Welle aufweist. Das Gehäuse der Handwerkzeugmaschine ist mechanischen Belastungen unterworfen, die im laufenden Betrieb von den Schwingungen des Antriebsmotors bzw. des Werkzeuges und dem Kontakt zwischen dem Werkzeug und dem zu bearbeitenden Werkstück stammen. Die auf das Gehäuse wirkenden Belastungen dürfen hierbei über die Lebensdauer der Handwerkzeugmaschine nicht zu einem Versagen führen.In EP 0 583 270 B1 an angle grinder is described, which has in a housing a drive motor for the rotatable drive of a tool receiving shaft. The housing of the power tool is subject to mechanical stresses that come during operation of the vibrations of the drive motor or the tool and the contact between the tool and the workpiece to be machined. The loads acting on the housing in this case may not lead to failure over the life of the power tool.
Zusätzlich zu den Stabilitätsanforderungen muss die Handwerkzeugmaschine einschließlich des Gehäuses in einfacher und problemloser Weise zu montieren sein.In addition to the stability requirements, the hand tool, including the housing, must be easy and trouble-free to install.
Offenbarung der ErfindungDisclosure of the invention
Der Erfindung liegt die Aufgabe zu Grunde, die Montage einer Handwerkzeugmaschine zu vereinfachen und zugleich eine hohe Stabilität insbesondere des Gehäuses der Handwerkzeugmaschine zu gewährleisten. Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.The invention is based on the object to simplify the installation of a hand tool and at the same time to ensure a high stability, in particular of the housing of the power tool. This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.
Die erfindungsgemäße Handwerkzeugmaschine, bei der es sich insbesondere um eine handgeführte Schleifmaschine wie beispielsweise einen Winkelschleifer handelt, besitzt ein zumindest zweiteiliges Gehäuse, dessen beide Gehäuseteile über eine Verbindungseinrichtung miteinander zu verbinden sind. Die Verbindungseinrichtung ist als eine Steckverbindung ausgebildet und weist eine Aufnahmenut an einem Gehäuseteil und einen in die Aufnahmenut eingreifenden Vorsprung am anderen Gehäuseteil auf. Die die Aufnahmenut begrenzenden Nutwände erstrecken sich hierbei in die Montagerichtung der Gehäuseteile, also in die Einsteckrichtung des Vorsprunges in die Aufnahmenut.The hand tool according to the invention, which is in particular a hand-held grinding machine such as an angle grinder, has an at least two-part housing, the two housing parts are to be connected to each other via a connecting device. The connecting device is designed as a plug connection and has a receiving groove on a housing part and a projection engaging in the receiving groove on the other housing part. The groove walls delimiting the receiving groove in this case extend in the mounting direction of the housing parts, ie in the insertion direction of the projection into the receiving groove.
Diese Ausführung zeichnet sich durch eine hohe Stabilität aus, da die Nutwandungen die beiden Gehäuseteile in Querrichtung, d.h. quer zur Montage- bzw. Einsteckrichtung stabilisieren. Schwingungen und sonstige Belastungen, die im Betrieb entstehen, führen daher nicht zu einem Lösen der Verbindung zwischen den beiden Gehäuseteilen. Auch in Einsteck- bzw. Montagerichtung kann eine sichere Verbindung realisiert werden, da lediglich eine Zugkraft zwischen den Gehäuseteilen erzeugt werden muss, beispielsweise über eine zusätzliche Schraubverbindung, um die beiden Gehäuseteile sicher aneinander zu halten; zusätzliche Justier- oder Stabilisiereinrichtungen für die Sicherung der gewünschten Montageposition der beiden Gehäuseteile relativ zueinander sind nicht erforderlich. Die endgültige Montageposition in Lateral- und in Längsrichtung wird durch das Einführen des Vorsprunges in die Aufnahmenut erreicht.This embodiment is characterized by a high stability, since the groove walls, the two housing parts in the transverse direction, i. Stabilize transversely to the mounting or insertion direction. Vibrations and other stresses that occur during operation, therefore, do not lead to a loosening of the connection between the two housing parts. Even in plug-in or mounting direction, a secure connection can be realized, since only a tensile force between the housing parts must be generated, for example via an additional screw to hold the two housing parts together securely; additional adjusting or stabilizing devices for securing the desired mounting position of the two housing parts relative to each other are not required. The final assembly position in Lateral- and longitudinal direction is achieved by inserting the projection in the receiving groove.
Die verbesserte Stabilität geht einher mit einer vereinfachten Montage sowie der Möglichkeit der Demontage, beispielsweise für Wartungszwecke. Die Gehäuseteile werden über dieThe improved stability is accompanied by a simplified assembly and the possibility of disassembly, for example, for maintenance purposes. The housing parts are over the
Verbindungseinrichtung miteinander verbunden und können durch Lösen der Verbindungseinrichtung für Wartungszwecke wieder voneinander gelöst werden. Außerdem erlaubt die Zweiteilung des Gehäuses eine optimale konstruktive Anpassung des jeweiligen Gehäuseteils an den Einsatzzweck, beispielsweise hinsichtlich der Materialwahl. So kann es zweckmäßig sein, als Gehäuseteile ein Motorgehäuse zur Aufnahme des Antriebsmotors und einConnection device connected to each other and can by releasing the connecting device for maintenance purposes again be solved from each other. In addition, the division of the housing allows optimum structural adaptation of the respective housing part to the intended use, for example with regard to the choice of material. So it may be useful as housing parts, a motor housing for receiving the drive motor and a
Getriebegehäuse zur Aufnahme der Werkzeugwelle auszuführen, wobei das Motorgehäuse aus einem Kunststoff und das Getriebegehäuse aus einem Leichtmetall, beispielsweise aus Aluminium bestehen kann. Die Verbindung über Nut und Vorsprung kann auch bei unterschiedlichen Materialien für die Gehäuseteile problemlos realisiert werden.Execute gear housing for receiving the tool shaft, wherein the motor housing made of a plastic and the gear housing made of a light metal, for example, may consist of aluminum. The connection via groove and projection can be easily realized even with different materials for the housing parts.
Für eine besonders einfache Ausführung kann es zweckmäßig sein, dass eine der Nutwände der Aufnahmenut von der Außenwand des betreffenden Gehäuseteils gebildet ist. Dies hat den Vorteil, dass lediglich die zweite, die Nut begrenzende Nutwand separat von der Gehäusewandung ausgebildet werden muss. Beispielsweise erfolgt dies derart, dass diese zweite Nutwand radial nach innen versetzt ist und sich somit im Inneren des betreffenden Gehäuseteils befindet, so dass nach außen hin keine überstehenden Bauteile der Aufnahmenut vorhanden sind und eine glattflächige Außenwandung erreicht wird. Es muss nur eine separate Nutwandung ausgebildet werden, da die zweite Nutwandung von der Außenwand des Gehäuseteils gebildet ist.For a particularly simple embodiment, it may be expedient that one of the groove walls of the receiving groove is formed by the outer wall of the relevant housing part. This has the advantage that only the second, the groove bounding groove wall must be formed separately from the housing wall. For example, this is done in such a way that this second groove wall is offset radially inward and is thus located in the interior of the relevant housing part, so that no protruding components of the receiving groove are present outwardly and a smooth-surfaced outer wall is achieved. It must be formed only a separate groove wall, since the second groove wall is formed by the outer wall of the housing part.
Vorteilhafterweise wird eine der Nutwandungen, insbesondere die radial innen liegende Nutwand, von einemAdvantageously, one of the groove walls, in particular the radially inner groove wall, of a
Stabilisierungsabschnitt übergriffen, der am anderen Gehäuseteil benachbart zum Vorsprung angeordnet ist. Dieser Stabilisierungsabschnitt weist eine an die Stirnseite derStabilization section overlapped, which is arranged on the other housing part adjacent to the projection. This stabilizing section has a to the front of the
Nutwand angepasste Vertiefung auf, in die die entsprechende Nutwand in der montierten Position einragt. DerGroove wall adapted recess into which projects the corresponding groove wall in the mounted position. Of the
Stabilisierungsabschnitt sorgt für eine zusätzliche Stabilität insbesondere in Querrichtung.Stabilization section provides additional stability, especially in the transverse direction.
Zur Montageerleichterung kann es vorteilhaft sein, in die Außenwand des die Aufnahmenut aufweisenden Gehäuseteils einen - A -To facilitate assembly, it may be advantageous in the outer wall of the receiving groove having a housing part - A -
Gehäuseausschnitt einzubringen, dem ein korrespondierender Gehäusevorsprung am anderen Gehäuseteil zugeordnet ist, wobei in der montieren Position der Gehäusevorsprung in den Gehäuseausschnitt einragt. Dieser Gehäuseausschnitt ist beispielsweise teilkreisförmig ausgebildet und liegt zweckmäßigerweise in der Montage- bzw. Einsteckrichtung, er verläuft somit parallel zu dem in die Aufnahmenut eingreifenden Vorsprung.Insert housing cutout, which is associated with a corresponding housing projection on the other housing part, wherein protrudes in the assembled position of the housing projection in the housing cutout. This housing cutout is formed, for example, part-circular and is conveniently in the mounting or insertion, it thus runs parallel to the engaging in the receiving projection.
Vorteilhafterweise ist an einem Gehäuseteil ein Aufnahmezylinder angeordnet, der zur Aufnahme einer Verbindungsschraube dient, wobei dem Aufnahmezylinder eine Verbindungsöffnung am anderen Gehäuseteil zugeordnet ist, durch die die Verbindungsschraube hindurchgeführt wird. Der Aufnahmezylinder nimmt den Gewindeabschnitt der Verbindungsschraube auf.Advantageously, a receiving cylinder is arranged on a housing part, which serves to receive a connecting screw, wherein the receiving cylinder is associated with a connecting opening on the other housing part through which the connecting screw is passed. The receiving cylinder takes on the threaded portion of the connecting screw.
Bei den beiden zu verbindenden Gehäuseteilen handelt es sich beispielhaft um ein Motorgehäuse zur Aufnahme eines Antriebsmotors und ein Getriebegehäuse zur Aufnahme einer Werkzeugwelle zum Antrieb des Werkzeuges. Der Aufnahmezylinder zur Aufnahme der Verbindungsschraube ist in dieser Ausführung bevorzugt am Kunststoff-Motorgehäuse ausgebildet, das vorzugsweise im Kunststoff-Spritzgussverfahren hergestellt werden kann. Das Leichtmetall-Getriebegehäuse benötigt dagegen keinen derartigen Aufnahmezylinder, sondern lediglich dieThe two housing parts to be connected are, for example, a motor housing for receiving a drive motor and a gear housing for receiving a tool shaft for driving the tool. The receiving cylinder for receiving the connecting screw is preferably formed in this embodiment on the plastic motor housing, which can preferably be produced by plastic injection molding. The light-metal gearbox, however, requires no such receiving cylinder, but only the
Aufnahmeöffnung zum Durchstecken der Verbindungsschraube, so dass das im Gussverfahren herzustellende Leichtmetall- Gehäuseteil einfacher ausgebildet ist und weniger Nachbearbeitung benötigt.Receiving opening for the insertion of the connecting screw, so that the produced by casting process light metal housing part is simpler and requires less reworking.
Die Steckverbindung ist zweckmäßigerweise radial zu einer eine Antriebswelle des Antriebsmotors aufnehmenden Durchtrittsöffnung in den Gehäuseteilen versetzt. In der Regel sind zwei Steckverbindungen vorgesehen, die sich jeweils mit radialem Abstand zu der Durchtrittsöffnung befinden und imThe connector is expediently offset radially to a drive shaft of the drive motor receiving passage opening in the housing parts. In general, two connectors are provided, each located at a radial distance to the passage opening and in
Außenwandbereich der Gehäuseteile angeordnet sind. Die beidseitig positionierten Steckverbindungen stellen sicher, dass die Gehäuseteile in der gewünschten Position axial zueinander ausgerichtet sind, so dass die Antriebswelle des Antriebsmotors spielfrei gelagert werden kann. Die Durchtrittsöffnung zwischen den Gehäuseteilen ist vorteilhafterweise Sitz eines Lagers zur drehbaren Aufnahme der Antriebswelle.Outside wall portion of the housing parts are arranged. The connectors positioned on both sides ensure that the housing parts are aligned in the desired position axially to each other, so that the drive shaft of the drive motor can be stored without play. The passage opening between the housing parts is advantageously the seat of a bearing for rotatably receiving the drive shaft.
Weitere Vorteile und zweckmäßige Ausführungen sind den weiterenFurther advantages and expedient designs are the further
Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:Claims, the description of the figures and the drawings. Show it:
Fig. 1 eine Schnittdarstellung einer als Winkelschleifer ausgebildeten Handwerkzeugmaschine mit einem Motorgehäuse zur Aufnahme des Antriebsmotors und einem Getriebegehäuse zur Aufnahme der Werkzeugwelle,1 is a sectional view of a designed as angle grinder hand tool with a motor housing for receiving the drive motor and a gear housing for receiving the tool shaft,
Fig. 2 eine perspektivische Einzeldarstellung desFig. 2 is a perspective view of the individual
Getriebegehäuses mit seitlichen Aufnahmenuten, die zur Aufnahme eines korrespondierenden Vorsprunges am Motorgehäuse dienen und sich mit radialem Abstand zu einer Durchtrittsöffnung für die Antriebswelle desTransmission housing with lateral grooves, which serve to receive a corresponding projection on the motor housing and at a radial distance to a passage opening for the drive shaft of the
Antriebsmotors befinden,Drive motor are located
Fig. 3 das Getriebegehäuse in einer Seitenansicht,3 shows the transmission housing in a side view,
Fig. 4 eine perspektivische Darstellung von Getriebegehäuse und dem mit dem Getriebegehäuse zu verbindenden Abschnitt des Motorgehäuses,4 is a perspective view of the transmission housing and to be connected to the transmission housing portion of the motor housing,
Fig. 5 eine Fig. 4 entsprechende Darstellung, jedoch aus einer anderen Perspektive,5 is a representation corresponding to FIG. 4, but from a different perspective,
Fig. 6 Getriebe- und Motorgehäuse im montierten Zustand in einer perspektivischen Ansicht,6 gear and motor housing in the assembled state in a perspective view,
Fig. 7 Getriebe- und Motorgehäuse aus einer anderen Perspektive, Fig. 8 Getriebe- und Motorgehäuse aus noch einer anderen Perspektive,Fig. 7 gear and motor housing from a different perspective, 8 shows gearbox and motor housing from yet another perspective,
Fig. 9 die Handwerkzeugmaschine mit Getriebegehäuse und zweigeteiltem Motorgehäuse.9 shows the hand tool with gear housing and two-part motor housing.
In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen .In the figures, the same components are provided with the same reference numerals.
Bei der in Fig. 1 dargestellten handgeführten Schleifmaschine handelt es sich um einen Winkelschleifer mit einem zweiteiligen Gehäuse, bestehend aus einem Motorgehäuse 2 zur Aufnahme eines elektrischen Antriebsmotors 4 und einem Getriebegehäuse 3 zur Aufnahme und Lagerung einer Werkzeugwelle 7, die Träger eines Werkzeuges 8 ist, wobei die Werkzeugwelle 7 in einemThe hand-held grinding machine illustrated in FIG. 1 is an angle grinder with a two-part housing, comprising a motor housing 2 for receiving an electric drive motor 4 and a transmission housing 3 for receiving and supporting a tool shaft 7, which carries a tool 8, wherein the tool shaft 7 in a
Lagerflansch 9 im Getriebegehäuse 3 drehbar gelagert ist und das Werkzeug 8 von einer Schutzhaube 10 übergriffen ist. Das Motorgehäuse 2 besteht aus Kunststoff und wird zweckmäßigerweise im Kunststoff-Spritzgussverfahren hergestellt. Das Getriebegehäuse 3 besteht vorzugsweise aus Leichtmetall, beispielsweise Aluminium und wird als Gussteil hergestellt. Im Getriebegehäuse 3 ist ein Getriebe 6 angeordnet, über das die Drehbewegung einer Anker- bzw. Antriebswelle 5 des Antriebsmotors 4 auf die Werkzeugwelle 7 übertragen wird.Bearing flange 9 is rotatably mounted in the gear housing 3 and the tool 8 is overlapped by a protective hood 10. The motor housing 2 is made of plastic and is conveniently prepared by plastic injection molding. The transmission housing 3 is preferably made of light metal, for example aluminum and is produced as a casting. In the transmission housing 3, a transmission 6 is arranged, via which the rotational movement of an armature or drive shaft 5 of the drive motor 4 is transmitted to the tool shaft 7.
Wie der Einzeldarstellung des Getriebegehäuses 2 gemäß den Figuren 2 und 3 zu entnehmen, ist in das Getriebegehäuse auf der dem Motorgehäuse zugewandten Seite ein Durchtrittsstutzen 12 mit einer zentralen Durchtrittsöffnung 11 zur Aufnahme und Lagerung der Anker- bzw. Antriebswelle 5 des Antriebsmotors eingebracht. In die Durchtrittsöffnung 11 kann ein Lager eingesetzt werden zur drehbaren Lagerung der Welle 5.As can be seen in the detail of the gearbox housing 2 according to FIGS. 2 and 3, a passage piece 12 with a central passage opening 11 for receiving and supporting the armature or drive shaft 5 of the drive motor is introduced into the gearbox housing on the side facing the motor housing. In the passage opening 11, a bearing can be used for rotatably supporting the shaft fifth
Im Seitenwandbereich - mit radialem Abstand zur zentralen Durchtrittsöffnung 11 - befindet sich unmittelbar benachbart zur Außenwand 13 des Getriebegehäuses 3 jeweils eine Aufnahmenut 14, die sich in Achsrichtung der Durchtrittsöffnung 11 erstreckt. Die Aufnahmenut 14 ist Teil einer Steckverbindung, über die das Getriebegehäuse mit dem Motorgehäuse zu verbinden ist. In die Aufnahmenut 14 ist in der montierten Position ein Vorsprung am Motorgehäuse eingesteckt.In the side wall region - at a radial distance from the central passage opening 11 - is immediately adjacent to the outer wall 13 of the gear housing 3 each have a receiving groove 14 which extends in the axial direction of the passage opening 11. The receiving groove 14 is part of a plug connection, via which the transmission housing is to be connected to the motor housing. In the receiving groove 14, a projection on the motor housing is inserted in the mounted position.
Die Aufnahmenut 14 wird von einer inneren Nutwand 15 und einer äußeren Nutwand begrenzt, wobei die äußere Nutwand identisch ist mit der Außenwand 13 des Getriebegehäuses 3. Die Aufnahmenut 14 und die innere Nutwand 15 erstrecken sich zur radialen Innenseite in Richtung des Gehäuseinneren.The receiving groove 14 is bounded by an inner groove wall 15 and an outer groove wall, wherein the outer groove wall is identical to the outer wall 13 of the transmission housing 3. The receiving groove 14 and the inner groove wall 15 extend to the radial inner side in the direction of the housing interior.
Die Einsteckrichtung in die Aufnahmenut 14 liegt in der Achsrichtung der Durchtrittsöffnung 11, die zugleich die Montagerichtung kennzeichnet, in der das Motorgehäuse und das Getriebegehäuse miteinander verbunden werden. DieThe insertion in the receiving groove 14 is in the axial direction of the passage opening 11, which also indicates the mounting direction, in which the motor housing and the gear housing are interconnected. The
Längserstreckung der Aufnahmenut 14 verläuft senkrecht hierzu.Longitudinal extent of the receiving groove 14 extends perpendicular thereto.
In die die Aufnahmenut 14 begrenzende Außenwand 13 ist ein teilkreisförmiger Gehäuseausschnitt 17 eingebracht, der sich ebenfalls in die Montage- bzw. Einsteckrichtung erstreckt. DerIn the receiving groove 14 bounding outer wall 13 is a partially circular housing cutout 17 is introduced, which also extends in the mounting or insertion. Of the
Gehäuseausschnitt 17 dient zur Aufnahme eines korrespondierenden Gehäusevorsprunges am anderen Gehäuseteil 2. Die Aufnahmenut 14 befindet sich in unmittelbarer Nachbarschaft zum Gehäuseausschnitt 17.Housing cutout 17 serves to receive a corresponding housing projection on the other housing part 2. The receiving groove 14 is located in the immediate vicinity of the housing cutout 17.
Zur Sicherung der Verbindung zwischen Getriebegehäuse 3 und Motorgehäuse 2 sind über den Umfang verteilt mehrere außen liegende Verbindungsöffnungen 16 in das Getriebegehäuse 3 eingebracht, durch die jeweils eine Verbindungsschraube hindurch gesteckt werden kann, deren Gewinde mit dem Motorgehäuse verschraubt wird.To secure the connection between the gear housing 3 and the motor housing 2 distributed over the circumference a plurality of external connection openings 16 are introduced into the transmission housing 3, through which a connecting screw can be inserted through each, the thread is screwed to the motor housing.
Wie den Figuren 4 und 5 zu entnehmen, ist am Motorgehäuse 2 ein axial überstehender Vorsprung 19 ausgebildet, dessen Wandstärke an die Nutbreite der Aufnahmenut im Getriebegehäuse 3 angebracht ist. Die Stirnseite des Vorsprunges 19 ragt in der montierten Position in die Aufnahmenut ein. Der Vorsprung 19 befindet sich an einem teilkreisförmigen Gehäusevorsprung 18, der dem ebenfalls teilkreisförmigen Gehäuseausschnitt 17 im Getriebegehäuse 3 zugeordnet ist.As can be seen in FIGS. 4 and 5, an axially projecting projection 19 is formed on the motor housing 2, the wall thickness of which is attached to the groove width of the receiving groove in the gear housing 3. The front side of the projection 19 protrudes in the mounted position in the receiving groove. The projection 19 is located at a part-circular housing projection 18 which is associated with the likewise part-circular housing cutout 17 in the transmission housing 3.
An dem Vorsprung 19 sind zwei Stabilisierungsabschnitte 20 ausgebildet, die die Stirnseite der inneren Nutwand 15 (Fig. 2) übergreifen, wofür in die Stabilisierungsabschnitte 20 eine Ausnehmung 21 eingebracht ist. Dadurch wird insbesondere in Querrichtung, also quer zur Einschub- bzw. Montagerichtung eine Stabilisierung der Verbindung zwischen Motorgehäuse und Getriebegehäuse erreicht.On the projection 19, two stabilizing portions 20 are formed, which engage over the end face of the inner groove wall 15 (FIG. 2), for which purpose a recess 21 is made in the stabilizing portions 20. As a result, stabilization of the connection between the motor housing and the transmission housing is achieved, in particular in the transverse direction, ie transversely to the insertion or mounting direction.
In den Figuren 6 und 7 sind Motorgehäuse 2 und Getriebegehäuse 3 in montierter Position dargestellt. Der teilkreisförmige Vorsprung 18 liegt in dem komplementär geformtenIn Figures 6 and 7, the motor housing 2 and gear housing 3 are shown in the mounted position. The part-circular projection 18 is located in the complementarily shaped
Gehäuseausschnitt 17 an und füllt diesen vollständig aus. In die Aufnahmenut 14 ragt der Vorsprung ein, welcher unmittelbar benachbart zum Gehäusevorsprung 18 angeordnet ist.Housing cutout 17 and fills it completely. In the receiving groove 14 protrudes the projection, which is disposed immediately adjacent to the housing projection 18.
Wie Fig. 8 zu entnehmen, sind einteilig mit dem Motorgehäuse 2 ein bzw. mehrere Aufnahmezylinder 22 ausgeführt, der bzw. die den Verbindungsöffnungen 16 zugeordnet sind und zur Aufnahme des Gewindeabschnitts einer Verbindungsschraube dient, welche durch die Verbindungsöffnung 16 geführt wird. Außerdem sind aus Fig. 8 zwei im Wesentlichen hohlzylindrische Querverbindungsabschnitte 23 zu erkennen, die einteilig mit dem Motorgehäuse ausgebildet sind und zur Verbindung von zwei in Fig. 9 dargestellten Motorgehäuseteilen 2a und 2b dienen, aus denen das Motorgehäuse aufgebaut ist. Die Querverbindungsabschnitte 23 verlaufen in Querrichtung, also quer zur Achs- bzw. Montagerichtung zwischen Motor- und Getriebegehäuse. As can be seen in FIG. 8, one or more receiving cylinders 22, which are assigned to the connecting openings 16 and serve to receive the threaded portion of a connecting screw, which is guided through the connecting opening 16, are embodied integrally with the motor housing 2. In addition, two substantially hollow cylindrical cross-connection sections 23 can be seen from FIG. 8, which are formed integrally with the motor housing and serve to connect two motor housing parts 2a and 2b shown in FIG. 9, from which the motor housing is constructed. The cross-connection sections 23 extend in the transverse direction, ie transversely to the axis or mounting direction between the engine and transmission housing.

Claims

Ansprüche claims
1. Handwerkzeugmaschine, insbesondere handgeführte Schleifmaschine, dadurch gekennzeichnet, dass das Gehäuse der Handwerkzeugmaschine (1) zwei Gehäuseteile (2, 3) umfasst, die über eine Verbindungseinrichtung miteinander zu verbinden sind, und dass die Verbindungseinrichtung eine Steckverbindung umfasst und eine Aufnahmenut (14) an einem Gehäuseteil (3) und einen in montierter Position in die Aufnahmenut (14) eingreifenden Vorsprung (19) am anderen Gehäuseteil (2) aufweist, wobei die die Aufnahmenut (14) begrenzenden Nutwände (15) sich in Montagerichtung erstrecken.1. Hand tool, in particular hand-held grinding machine, characterized in that the housing of the power tool (1) comprises two housing parts (2, 3) which are to be connected to each other via a connecting device, and that the connecting device comprises a plug connection and a receiving groove (14) on a housing part (3) and in a mounted position in the receiving groove (14) engaging projection (19) on the other housing part (2), wherein the receiving groove (14) delimiting groove walls (15) extend in the mounting direction.
2. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass eine Nutwand (15) von der Außenwand (13) des Gehäuseteils (3) gebildet ist.2. Hand tool according to Claim 1, characterized in that a groove wall (15) of the outer wall (13) of the housing part (3) is formed.
3. Handwerkzeugmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Aufnahmenut (14) auf der Innenseite der Außenwand (13) des Gehäuseteils (3) angeordnet ist.3. Hand tool according to Claim 1 or 2, characterized in that the receiving groove (14) on the inside of the outer wall (13) of the housing part (3) is arranged.
4. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass in die Außenwand (13) des die Aufnahmenut (14) aufweisenden Gehäuseteils (3) ein Gehäuseausschnitt (17) eingebracht ist, in den in der montierten Position ein korrespondierender Gehäusevorsprung (18) am anderen Gehäuseteil (2) einragt.4. Hand tool according to one of claims 1 to 3, characterized in that in the outer wall (13) of the receiving groove (14) housing part (3) has a housing cutout (17) is introduced, in which in the mounted position a corresponding housing projection (13). 18) protrudes on the other housing part (2).
5. Handwerkzeugmaschine nach Anspruch 4, dadurch gekennzeichnet, dass die Aufnahmenut (14) sich in5. Hand tool according to Claim 4, characterized in that the receiving groove (14) in
Montagerichtung gesehen unmittelbar an den Gehäuseausschnitt (17) anschließt. Mounting direction seen immediately adjacent to the housing cutout (17).
6. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Nutwand (15) der Aufnahmenut6. Hand tool according to one of claims 1 to 5, characterized in that a groove wall (15) of the receiving groove
(14) von einem Stabilisierungsabschnitt (20) am anderen Gehäuseteil (2) übergriffen ist.(14) of a stabilizing portion (20) on the other housing part (2) is overlapped.
7. Handwerkzeugmaschine nach Anspruch 6, dadurch gekennzeichnet, dass der Stabilisierungsabschnitt (20) mit dem in die Aufnahmenut (15) eingreifenden Vorsprung (19) verbunden ist.7. Hand tool according to Claim 6, characterized in that the stabilizing portion (20) with the in the receiving groove (15) engaging projection (19) is connected.
8. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass an einem Gehäuseteil (2) ein Aufnahmezylinder (22) zur Aufnahme einer Verbindungsschraube vorgesehen ist, wobei der Aufnahmezylinder (22) in der montierten Position mit einer Verbindungsöffnung (16) am anderen Gehäuseteil (3) korrespondiert.8. Hand tool according to one of claims 1 to 7, characterized in that on a housing part (2) a receiving cylinder (22) is provided for receiving a connecting screw, wherein the receiving cylinder (22) in the mounted position with a connection opening (16) on other housing part (3) corresponds.
9. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Gehäuseteile (2, 3) ein9. Hand tool according to one of claims 1 to 8, characterized in that the housing parts (2, 3) a
Motorgehäuse (2) zur Aufnahme eines Antriebsmotors (4) und ein Getriebegehäuse (3) zur Aufnahme einer Werkzeugwelle (7) bilden.Motor housing (2) for receiving a drive motor (4) and a transmission housing (3) for receiving a tool shaft (7) form.
10. Handwerkzeugmaschine nach Anspruch 9, dadurch gekennzeichnet, dass das Motorgehäuse (2) aus Kunststoff gefertigt ist.10. Hand tool according to Claim 9, characterized in that the motor housing (2) is made of plastic.
11. Handwerkzeugmaschine nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass das Getriebegehäuse (3) aus Leichtmetall, insbesondere aus Aluminium gefertigt ist.11. Hand tool according to Claim 9 or 10, characterized in that the gear housing (3) made of light metal, in particular made of aluminum.
12. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Steckverbindung radial versetzt zu einer eine Antriebswelle des Antriebsmotors (4) aufnehmenden Durchtrittsöffnung (11) angeordnet ist.12. Hand tool according to one of claims 1 to 11, characterized in that the plug connection is radially offset from a drive shaft of the drive motor (4) receiving through opening (11) is arranged.
13. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass zwei Steckverbindungen an gegenüberliegenden Gehäuseseiten vorgesehen sind. 13. Hand tool according to one of claims 1 to 12, characterized in that two plug connections are provided on opposite sides of the housing.
EP08873426A 2008-03-18 2008-11-18 Hand-held machine tool, in particular hand-guided grinding machine Active EP2268450B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000728A DE102008000728A1 (en) 2008-03-18 2008-03-18 Hand tool, in particular hand-guided grinding machine
PCT/EP2008/065708 WO2009115142A1 (en) 2008-03-18 2008-11-18 Hand-held machine tool, in particular hand-guided grinding machine

Publications (2)

Publication Number Publication Date
EP2268450A1 true EP2268450A1 (en) 2011-01-05
EP2268450B1 EP2268450B1 (en) 2012-10-10

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EP08873426A Active EP2268450B1 (en) 2008-03-18 2008-11-18 Hand-held machine tool, in particular hand-guided grinding machine

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US (1) US20110014857A1 (en)
EP (1) EP2268450B1 (en)
CN (1) CN101977729B (en)
DE (1) DE102008000728A1 (en)
WO (1) WO2009115142A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014102271A1 (en) * 2013-03-15 2014-09-18 Maxim Integrated Products, Inc. Method and device for granting an access permit
DE102019207973A1 (en) * 2019-05-29 2020-12-03 Robert Bosch Gmbh Hand machine tool
DE102020210628A1 (en) 2020-08-20 2022-02-24 Robert Bosch Gesellschaft mit beschränkter Haftung hand tool

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US4266376A (en) * 1979-02-09 1981-05-12 Black & Decker Inc. Portable electrically energized surface finishing tool
DE4113641A1 (en) 1991-04-26 1992-10-29 Bosch Gmbh Robert HAND MACHINE TOOL
US5642008A (en) * 1995-10-20 1997-06-24 Waxing Corporation Of America, Inc. Power tool motor assembly
JPH10249754A (en) * 1997-02-27 1998-09-22 Robert Bosch Gmbh Hand electric working board
GB0105140D0 (en) 2001-03-02 2001-04-18 Black & Decker Inc Power tool body
DE10231249B4 (en) 2002-07-11 2008-04-30 Robert Bosch Gmbh Hand tool
DE10242738A1 (en) * 2002-09-13 2005-01-20 Robert Bosch Gmbh Hand tool machine, in particular angle grinder
DE102004016171A1 (en) * 2004-03-30 2005-10-20 Bosch Gmbh Robert Hand tool
DE102005061870A1 (en) * 2005-12-23 2007-07-05 Robert Bosch Gmbh Electric-powered hand tool e.g. rotary sanding or polishing tool has two-part housing with one overlapping half linked to the other by vibration dampener
JP4962896B2 (en) * 2006-03-10 2012-06-27 日立工機株式会社 Power tool

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Also Published As

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CN101977729A (en) 2011-02-16
WO2009115142A1 (en) 2009-09-24
DE102008000728A1 (en) 2009-09-24
EP2268450B1 (en) 2012-10-10
US20110014857A1 (en) 2011-01-20
CN101977729B (en) 2013-09-11

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