EP0558893B1 - Motor driven appliance being designed as handhold appliance for grinding, polishing, derosting or suchlike treatment of surfaces - Google Patents

Motor driven appliance being designed as handhold appliance for grinding, polishing, derosting or suchlike treatment of surfaces Download PDF

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Publication number
EP0558893B1
EP0558893B1 EP93100473A EP93100473A EP0558893B1 EP 0558893 B1 EP0558893 B1 EP 0558893B1 EP 93100473 A EP93100473 A EP 93100473A EP 93100473 A EP93100473 A EP 93100473A EP 0558893 B1 EP0558893 B1 EP 0558893B1
Authority
EP
European Patent Office
Prior art keywords
handle
motor housing
tool
motor
guide
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.)
Expired - Lifetime
Application number
EP93100473A
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German (de)
French (fr)
Other versions
EP0558893A3 (en
EP0558893A2 (en
Inventor
Kurt Stoll
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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Filing date
Publication date
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP0558893A2 publication Critical patent/EP0558893A2/en
Publication of EP0558893A3 publication Critical patent/EP0558893A3/en
Application granted granted Critical
Publication of EP0558893B1 publication Critical patent/EP0558893B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • 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
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention relates to a hand-held, motor-driven device for grinding, polishing, rust removal or the like processing of surfaces, with a drive motor arranged in a motor housing, which has a rotating motor shaft during operation, which drives a tool holder for a particularly disk-shaped machining tool a handle connected to the motor housing for holding the device, and with an additional guide handle which is arranged in the direction of the axis of rotation of the tool holder at least approximately at the same height as the handle and protrudes laterally from the motor housing and which is adjustable in circumferential direction with respect to the axis of rotation of the tool holder Motor housing is connected and opposite this in different circumferential positions can be detachably fixed.
  • a device of this type is disclosed in JP-A-55/112759. It has a motor housing that also forms a handle on which the device can be held during machining. The motor housing receives the drive motor, to the motor shaft of which a respective machining tool is connected.
  • An additional guide handle which protrudes from the side of the motor housing, allows the device to be held with both hands and thus more secure guidance during machining. Tilting of the machining tool in relation to a surface to be machined can therefore be largely excluded. Should a force nevertheless act on the device which it intends to throw off the track, such conditions can be counteracted optimally by holding the handle. Even parts of workpieces that are difficult to access can be processed very precisely.
  • the adjustment option of the handle allows adaptation to left-handed or right-handed operation. If the handle is not required, it can be removed.
  • Disassembly of the handle requires releasing a handle plate from the concave Part of a section of a gearbox housing, for which a band has to be loosened and a cover hood has to be removed.
  • the handle extends at an angle to the motor shaft and protrudes laterally from the motor housing, and that the handle has a receiving opening located in the adjustment path of the guide handle, into which the guide handle can be at least partially submerged.
  • the handle protruding from the side of the motor housing allows the device to be held securely during machining. If the guide handle is not required during processing, it can be sunk into the receiving opening of the guide handle, so that it assumes a non-obstructing position without having to be removed.
  • DE-A-25 59 132 shows a device which has a handle which can be swiveled by a maximum of about 300 °. He can be put in a position in which it lies on the side of the motor housing. However, sinking into the handle is not possible.
  • the device described in US-A-4 643 263 has two handles, both of which are designed as swivel handles. An at least partial sinking of one handle in the other is not possible.
  • the guide handle is expediently arranged on the motor housing in a continuously adjustable manner and can be fixed in any circumferential position on the motor housing.
  • the adjustment range preferably extends over 36o °.
  • the guide handle itself is preferably designed as a handle for its adjustment and releasable fixing relative to the motor housing. This saves additional fasteners. It expediently forms a rotary member to be rotated for loosening or fixing, the axis of rotation preferably coinciding with the direction in which it protrudes from the motor housing.
  • the guide handle is arranged on a clamping band surrounding the motor housing in the circumferential direction with respect to the axis of rotation.
  • this clamping band can expediently be braced or released from the motor housing by acting on the guide handle.
  • the device can easily be placed on and / or guided along any reference surface during a machining process. This increases the precision of the machining processes even more in special cases.
  • the device can be connected to a suction device for dust, chips or similar contaminants, hereinafter referred to as a dust suction device.
  • a dust suction device This effectively protects the work area as well as the environment from dirt.
  • the means for dust extraction are processing cumbersome and can contribute to an increase in weight of the device.
  • the device can have a cover part which can be detachably fixed in a cover position with partial covering of the gripping surface on the handle, wherein it forms a suction channel of a dust extraction device opening into the working area of the held processing tool and at the same time with its outer surface as a gripping surface section takes the place of the covered handle section.
  • the handle When the cover is removed, the handle is in its original shape. At times when dust extraction is desired, only the cover part needs to be attached, so that there is a suction channel to which, for example, a suction unit can be connected. Since the outer surface of the cover part takes over the gripping surface function, the handling of the device does not change compared to the removed cover part. This is advantageous for the user.
  • the removable cover part can be realized with practically all motor-driven processing devices or power tools. However, it is particularly advantageous in connection with a device of the type in question here, in which the weight saving plays a significant role.
  • the device shown in the drawing is designed as a hand-held device and is used for grinding, polishing, brushing, rust removal or other comparable work on any object surface.
  • the type of processing mainly depends on the processing tool operated with the device. You could also call the device a hand tool.
  • the device has a motor housing 1 with a substantially circular cylindrical shape on the outside.
  • the two end faces represent the top 2 and the bottom 3 of the motor housing 1.
  • an electric drive motor 4 which is only indicated by dashed lines and which has a driven motor shaft 5 which projects from the motor housing 1 on the underside 3.
  • a tool holder 6 At the free end of the motor shaft 5 there is a tool holder 6, indicated only by dashed lines, which in the exemplary embodiment is formed by a threaded section which cooperates with a clamping nut.
  • a disc-shaped machining tool 7 is detachably and coaxially fixed on it.
  • the exemplary embodiment is a grinding plate covered with an abrasive coating 8.
  • the machining tool 7 Since the machining tool 7 is fixed directly to the motor shaft 5, a compact construction results, with the drive motor 4 being located centrally above the machining tool 7. It is preferably a gearless arrangement, so that the motor speed coincides with the speed of the machining tool 7 and there is no need for weight-increasing, noisy gear means such as meshing gears during operation. While maintaining the advantages, the machining tool 7 could also be seated on a linear extension of the motor shaft 5. In any case, an arrangement is preferred in which the axis of rotation 9 of the machining tool 7 and tool holder 6 coincides with the motor shaft 5, that is to say the axis of rotation 13 thereof.
  • a handle 15 is arranged laterally, in the region of the peripheral surface 14 of the motor housing 1 formed by the cylindrical jacket. It is firmly and permanently connected to the motor housing 1, in particular in that it is formed in one piece with the motor housing 1. In the exemplary embodiment, it has an essentially rod-like shape and extends at an angle to the motor shaft 5, so that it projects laterally from the motor housing 1. 4, the longitudinal axis 16 of the handle 15 expediently runs radially with respect to the circumferential surface 14. In the side view according to FIG. 2, the longitudinal axis 16 can run at right angles to the axis of rotation 13, but is preferably, as shown, slightly inclined, so that the handle 15 rises slightly upwards towards its free end 17. In the exemplary embodiment, the handle 15 starts in the section of the peripheral surface 14 that follows the underside 3. Since its width measured in the height direction is less than the height of the motor housing 1, this protrudes with an upper cylindrical end section 18 over the handle 15.
  • the diameter of the machining tool 7 expediently corresponds at least substantially to the diameter of the motor housing 1.
  • the device also has a second handle, which is referred to as a guide handle 19, since it is gripped by the user mainly for guiding the device.
  • the rigid handle 15 serves rather to hold the device in general and to transmit the contact pressure to a surface on which the machining tool 7 is applied.
  • the guide handle 19 is also arranged laterally, in the region of the circumferential surface 14, on the motor housing 1 and protrudes radially from the latter in particular radially to the axis of rotation 13. Its longitudinal extent, measured in the direction of the free end, is less than that of the handle 15, that is, it projects less than this from the motor housing 1.
  • the guide handle 19 has an essentially button-like shape.
  • a great advantage of the guide handle 19 is that it is adjustable relative to the motor housing 1 in the circumferential direction with respect to the axis of rotation 9.
  • the direction of adjustment is indicated in FIGS. 1 and 4 by the double arrow 20.
  • the guide handle 19 can be releasably fixed with respect to the motor housing 1, forming a practically rigid handle in the fixed state.
  • the guide handle 19 assumes a circumferential position 21 diametrically opposite the handle 15. It stands in the opposite direction to the handle 15 from the motor housing 1.
  • the separate guide handle 19 is held on the motor housing 1 by means of a clamping band 22.
  • This is placed around the motor housing 1 in a coaxial arrangement, wherein it extends in the circumferential direction with respect to the axis of rotation 9 and thus in the direction of adjustment 20 and bears against the circumferential surface 14 .
  • the clamping band 22 can either be tensioned such that it is immovably fixed relative to the motor housing 1, or it can be released so that it together with the guide handle 19 in the direction of adjustment 20 up to the desired circumferential position 21 relative to the motor housing 1 is rotatable.
  • the advantage here is that the guide handle 19 can be adjusted continuously and can be locked in any possible circumferential position.
  • FIG. 4 only a few of the possible circumferential positions are selected as examples.
  • the clamping band 22 assumes a clearly defined position in the direction of the axis of rotation 9 and thus in the height direction 23 of the device, a not shown in the peripheral surface 14, at least partially along the peripheral surface 14 extending recess into which the clamping band 22 is immersed with at least part of its thickness.
  • the flanks of the depression form stops which prevent the clamping band 22 from moving in the height direction 23 without disturbing the movement in the adjustment direction 20.
  • the structure of the guide handle 19 provided in the exemplary embodiment will be explained below. Accordingly, it comprises a threaded part 27 which, starting from the already mentioned outer surface 28 of the clamping band 22, extends radially outwards. In the exemplary embodiment, it is formed by the shaft of a screw 29 which is fixedly placed on the outer surface 28 with the head surface 30 opposite the shaft. For example, a welded or adhesive connection can be provided for the firm connection.
  • a screw part 31 is placed on the threaded part 27 and can be screwed back and forth on the threaded part 27 by turning it according to the double arrow 32 shown in FIG. In the embodiment it has the shape of a ball.
  • a pressing element 33 which is supported on the one hand on the screw part 31 and on the other hand on the peripheral surface 14 of the motor housing 1.
  • it is sleeve-shaped and axially adjustably attached to the screw 29.
  • the pressing surface 34 cooperating with the screw part 31 is spherically complementary to the spherical shape in the exemplary embodiment, so that the pressing force is optimally transmitted.
  • the pressing element 33 is provided with a recess 35 which is continuous in the longitudinal direction of the band and into which the clamping band 22 can dip, the parts of the pressing element 33 lying next to the recess 35 forming pressing parts 36 which support against the peripheral surface 14.
  • the through opening 37 of the pressing element 33 which allows it to be plugged onto the screw part 31, is widened in the area adjacent to the recess 35 in such a way that the screw head is also received.
  • the guide handle 19 of the embodiment is designed as a rotary handle.
  • the pressing element 33 with its pressing parts 36 is pressed against the peripheral surface 14, as a result of this support the clamping band 22 connected to the threaded part 27 being pulled radially outward in the connection area with the threaded part 27.
  • the clamping band 22 is tensioned against the motor housing 1, particularly in the regions diametrically opposite the guide handle 19.
  • the adjustment range of the guide handle 19 extends over 360 degrees. It can therefore be arranged at any point along the peripheral surface 14.
  • the guide handle 19 is arranged at the same height as the attachment point of the handle 15, viewed in the height direction 23. As can be clearly seen from FIG. 2, the guide handle 19 assumes a position in the region of the middle of the height of the handle 15.
  • the width of the guide handle 19 measured in the height direction 23 is less than the correspondingly measured width of the section 38 of the handle 15 directly adjoining the motor housing 1.
  • This section 38 is provided with a receiving opening 39 which passes through the handle 15 in the circumferential direction with respect to the axis of rotation 9. Their cross-sectional contour is selected so that the handle 19 fits through.
  • the guide handle 19 comes to lie very close to the machining tool 7 and thus to the working area 45 of the device. This allows the device to be guided precisely during a machining operation. At the same time, there is the possibility of positioning the guide handle 19 freely at any point on the circumference of the motor housing 1 by the handle 15.
  • the actual task of the receiving opening 39 is, however, to receive the guide handle 19 in a rest position if, owing to special circumstances, it is not required or is a hindrance in the context of the current processing.
  • This rest position is shown in FIG. 4 at 21 ′′.
  • the guide handle 19 comes to rest completely sunk in the handle 15, so that the device has a shape which corresponds to that of a handle-less device without complex removal of the handle 19.
  • the guide handle 19 and in particular its screw part 31 are easily accessible in order to be in the rest position 21 '' to clamp against the motor housing 1 and to be able to loosen it again later. It may also be expedient to match the width of the guide handle 19 to the width of the handle 15 in such a way that the screw part 31 in the rest position 21 ′′ slightly projects beyond the lateral outer surfaces 46 of the handle 15 on both sides and is therefore easy to grasp (not shown). .
  • the receiving opening 39 is closed apart from the lateral openings, in an embodiment not shown it is open at one point on its circumference, in particular towards the top 2. This allows an even better handling of the guide handle 19 in the rest position 21 ′′.
  • the device shown is furthermore provided with a contact surface 47 with which it can be applied and / or displaced along a reference surface formed, for example, by the object to be processed during a machining operation.
  • a contact surface 47 with which it can be applied and / or displaced along a reference surface formed, for example, by the object to be processed during a machining operation.
  • two such contact surfaces 47 are provided, which are arranged in mirror image with respect to a vertical plane containing the axis of rotation 9 and the longitudinal axis 16.
  • the respective contact surface 47 is located in the area of the underside 3 of the motor housing 1, and as shown it can protrude in the direction of the machining tool 7 via the motor housing 1.
  • the contact surface 47 also expediently protrudes radially beyond the peripheral edge 49 of the respective machining tool 7, as can be seen above all from FIG.
  • the respective contact surface 47 is preferably designed as a flat surface which runs in a tangential plane applied to the machining tool 7 or the motor housing 1 or in a plane parallel thereto.
  • the respective contact surface 47 begins at a point 50 of the peripheral surface 14 on both sides of the vertical plane mentioned and extends from there in the direction of the handle 15, its distance from the longitudinal axis 16 increasing with increasing distance from the peripheral surface 14.
  • the contact surfaces 47 are expediently formed integrally on the motor housing 1 and / or the handle 15.
  • the device shown is preferably also designed for dust extraction. It is possible to connect a suction unit (not shown in more detail) and to remove abrasion occurring in the work area 45, hereinafter referred to as dust, from the work area 45.
  • a suction unit not shown in more detail
  • dust abrasion occurring in the work area 45
  • such means are a hindrance or lead to a disadvantageous increase in weight in fine machining operations, so that it is advantageous if the agents can be removed when not in use.
  • a cover part 51 is provided as the means for dust extraction in the device shown. It can be detachably attached to the handle 15 in a covering position that is clearly visible in FIGS. 2 and 3.
  • the gripping surface 52 of the handle 15 that is to say that surface which extends over the circumference of the handle 15 and which the user normally grips with one hand when handling the device, is partially covered in the covering position by the covering part 51. In the exemplary embodiment, this is essentially the downward-facing part 53 of the gripping surface 52, since the cover part 51 sits in the cover position on the underside of the handle 15 facing the work area.
  • the design of the cover part 51 is matched to the shape of the handle 15 in such a way that these two parts delimit between them a suction channel 54 which opens into the working area 45 and which belongs to a dust suction device.
  • the cover part 51 has a groove-like cross-sectional contour which can be seen in FIG. 3, the suction space being delimited on the one hand by the concavely curved inner surface 55 of the cover part 51 and on the other hand directly by the covered gripping surface part 53.
  • the cover part 51 is designed such that the suction channel 54 essentially follows the longitudinal profile of the handle 15 and, when approaching the motor housing 1, runs downward in an arcuate section 56 to the working area 45.
  • the width of the suction channel 54 corresponds essentially to the width of the handle 15. Only in the area of the arc section 56 does the suction channel 54 widen and open into a suction opening 57 which extends in an arc along a peripheral section of the machining tool 7.
  • the cover part 51 can be provided with a sealing trim 58, which in the exemplary embodiment is formed by a bristle partial ring.
  • the cover part 51 can have a connecting section 59, via which, for example, a flexible suction line leading to a suction unit can be connected.
  • the cover part 51 expediently has a rounded outer surface 60. In the cover position, this takes the place of the covered gripping surface part 53, so that it fulfills the gripping surface function and the cover part 51 practically belongs to the handle 15.
  • the device can always be gripped comfortably.
  • the detachable mounting of the cover part 51 on the handle 15 takes place in the exemplary embodiment by means of a plug connection device 61.
  • a longitudinal groove 62 is provided on the handle 15 in the area of the two lateral outer surfaces 46, which run parallel to the longitudinal axis 16.
  • the cover part 51 engages in the longitudinal groove 62 with holding projections 64 which are formed in the region of the longitudinal opening 63 at the edge regions of the cover part 51. If the longitudinal grooves 62 are open towards the free end 17, the retaining projections 64 can be inserted from there without any problems.
  • the slot-like longitudinal opening 63 of the cover part 51 is expediently covered by a device-side guide surface 65.
  • An end section 66 of the cover part 51 protruding beyond the free end 17, as in the exemplary embodiment, is expediently designed to be tubular over the circumference, so that no pressure drop occurs.
  • the cover part 51 can in principle be formed as a tubular part over the entire length, with any holding projections 64 present in the area the outer surface can be molded. It is also possible to make the longitudinal opening 63 closed on both narrow sides, so that the cover part 51 has a tubular shape in the region of both end sections. In this case, the holding projections 64 only extend over the length of the longitudinal opening 63, for example.
  • the abovementioned contact surfaces 47 can also be at least partially provided on the cover part 51. This allows for easy removal from the device should they prove to be a hindrance.
  • cover part described can also be used advantageously in connection with other hand power tools, regardless of their other configuration. Even with machines with a non-rotating processing tool, for example with jigsaws, this measure, which is advantageous for dust extraction, can be easily implemented.
  • the motor housing 1 and the handle 15 advantageously form a device housing which is divided in the middle along the above-mentioned vertical plane (at 67), the two housing halves 68 being detachable from one another for repair and assembly purposes.

Description

Die Erfindung betrifft ein als Handgerät ausgebildetes, motorisch angetriebenes Gerät zum Schleifen, Polieren, Entrosten oder dergleichen Bearbeiten von Oberflächen, mit einem in einem Motorengehäuse angeordneten Antriebsmotor, der eine im Betrieb rotierende Motorwelle aufweist, die einen Werkzeughalter für ein insbesondere scheibenförmiges Bearbeitungswerkzeug antreibt, mit einem mit dem Motorengehäuse verbundenen Handgriff zum Halten des Gerätes, und mit einem zusätzlichen, in Richtung der Rotationsachse des Werkzeughalters zumindest in etwa auf gleicher Höhe wie der Handgriff angeordneten und seitlich vom Motorengehäuse abstehenden Führgriff, der in Umfangsrichtung bezüglich der Rotationsachse des Werkzeughalters verstellbar mit dem Motorengehäuse verbunden ist und sich diesem gegenüber in verschiedenen Umfangspositionen lösbar festlegen läßt.The invention relates to a hand-held, motor-driven device for grinding, polishing, rust removal or the like processing of surfaces, with a drive motor arranged in a motor housing, which has a rotating motor shaft during operation, which drives a tool holder for a particularly disk-shaped machining tool a handle connected to the motor housing for holding the device, and with an additional guide handle which is arranged in the direction of the axis of rotation of the tool holder at least approximately at the same height as the handle and protrudes laterally from the motor housing and which is adjustable in circumferential direction with respect to the axis of rotation of the tool holder Motor housing is connected and opposite this in different circumferential positions can be detachably fixed.

Ein Gerät dieser Art geht aus der JP-A-55/112759 hervor. Es verfügt über ein Motorengehäuse, das gleichzeitig einen Handgriff bildet, an dem das Gerät während der Bearbeitung gehalten werden kann. Das Motorengehäuse nimmt den Antriebsmotor auf, mit dessen Motorwelle ein jeweiliges Bearbeitungswerkzeug verbunden wird.A device of this type is disclosed in JP-A-55/112759. It has a motor housing that also forms a handle on which the device can be held during machining. The motor housing receives the drive motor, to the motor shaft of which a respective machining tool is connected.

Ein zusätzlich verhandener Führgriff, der seitlich vom Motorengehäuse absteht, erlaubt ein beidhändiges Halten des Gerätes und damit eine sicherere Führung während der Bearbeitung. Verkantungen des Bearbeitungswerkzeuges gegenüber einer zu bearbeitenden Oberfläche können daher weitestgehend ausgeschlossen werden. Sollte dennoch auf das Gerät eine Kraft einwirken, die es aus der Bahn zu werfen beabsichtigt, so kann derartigen Gegebenheiten durch das Festhalten des Führgriffes optimal entgegengewirkt werden. Auch schwer zugängliche Stellen von Werkstücken lassen sich sehr präzise bearbeiten. Die Verstellmöglichkeit des Führgriffes ermöglicht eine Anpassung an eine linkshändige oder rechtshändige Bedienung. Wird der Führgriff nicht benötigt, kann er demontiert werden.An additional guide handle, which protrudes from the side of the motor housing, allows the device to be held with both hands and thus more secure guidance during machining. Tilting of the machining tool in relation to a surface to be machined can therefore be largely excluded. Should a force nevertheless act on the device which it intends to throw off the track, such conditions can be counteracted optimally by holding the handle. Even parts of workpieces that are difficult to access can be processed very precisely. The adjustment option of the handle allows adaptation to left-handed or right-handed operation. If the handle is not required, it can be removed.

Die Demontage des Führgriffes erfordert das Lösen einer Griffplatte vom konkaven Teil eines Abschnittes eines Getriebegehäuses, wozu ein Band gelöst und eine Abdeckhaube abgenommen werden muß.Disassembly of the handle requires releasing a handle plate from the concave Part of a section of a gearbox housing, for which a band has to be loosened and a cover hood has to be removed.

Es ist die Aufgabe der vorliegenden Erfindung, ein Gerät der eingangs genannten Art zu schaffen, das sich einfacher handhaben läßt.It is the object of the present invention to provide a device of the type mentioned at the outset which is easier to handle.

Zur Lösung dieser Aufgabe ist vorgesehen, daß der Handgriff winkelig zur Motorwelle verläuft und seitlich vom Motorengehäuse absteht, und daß der Handgriff eine im Verstellweg des Führgriffes liegende Aufnahmeöffnung aufweist, in die der Führgriff zumindest teilweise versenkbar ist.To solve this problem it is provided that the handle extends at an angle to the motor shaft and protrudes laterally from the motor housing, and that the handle has a receiving opening located in the adjustment path of the guide handle, into which the guide handle can be at least partially submerged.

Der seitlich vom Motorengehäuse abstehende Handgriff erlaubt ein sicheres Halten des Gerätes während der Bearbeitung. Wird der Führgriff bei einer Bearbeitung nicht benötigt, läßt er sich in die Aufnahmeöffnung des Führgriffes versenken, so daß er eine nicht hindernde Position einnimmt, ohne abgenommen werden zu müssen.The handle protruding from the side of the motor housing allows the device to be held securely during machining. If the guide handle is not required during processing, it can be sunk into the receiving opening of the guide handle, so that it assumes a non-obstructing position without having to be removed.

Aus der DE-A-25 59 132 geht ein Gerät hervor, das einen Führgriff besitzt, der sich um maximal etwa 3oo° verschwenken läßt. Er kann zwar in eine Position gebracht werden, in der er seitlich am Motorengehäuse anliegt. Ein Versenken im Handgriff ist jedoch nicht möglich.DE-A-25 59 132 shows a device which has a handle which can be swiveled by a maximum of about 300 °. He can be put in a position in which it lies on the side of the motor housing. However, sinking into the handle is not possible.

Das in der US-A-4 643 263 beschriebene Gerät besitzt zwei Griffe, die beide als Schwenkgriffe ausgebildet sind. Ein zumindest teilweises Versenken des einen Griffes im anderen ist nicht möglich.The device described in US-A-4 643 263 has two handles, both of which are designed as swivel handles. An at least partial sinking of one handle in the other is not possible.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen aufgeführt.Advantageous developments of the invention are listed in the subclaims.

Der Führgriff ist zweckmässigerweise stufenlos verstellbar am Motorengehäuse angeordnet und läßt sich in jeder Umfangsposition am Motorengehäuse festlegen. Der Verstellbereich erstreckt sich vorzugsweise über 36o°.The guide handle is expediently arranged on the motor housing in a continuously adjustable manner and can be fixed in any circumferential position on the motor housing. The adjustment range preferably extends over 36o °.

Bevorzugt ist der Führgriff selbst als Handhabe für sein Verstellen und lösbares Festlegen gegenüber dem Motorengehäuse ausgebildet. Man spart dadurch zusätzliche Befestigungsmittel. Er bildet zweckmässigerweise ein zum Lösen oder Festlegen zu drehendes Drehglied, wobei die Drehachse vorzugsweise mit der Richtung seines Abstehens vom Motorengehäuse zusammenfällt.The guide handle itself is preferably designed as a handle for its adjustment and releasable fixing relative to the motor housing. This saves additional fasteners. It expediently forms a rotary member to be rotated for loosening or fixing, the axis of rotation preferably coinciding with the direction in which it protrudes from the motor housing.

Dies hat auch den Vorteil, daß sich der Führgriff auch in der Ruhestellung, in der er zumindest teilweise von Partien des Handgriffes verdeckt ist, problemlos arretieren oder lösen läßt.This also has the advantage that the guide handle can be easily locked or released even in the rest position, in which it is at least partially covered by parts of the handle.

Bei einer besonders einfachen Ausgestaltung ist der Führgriff an einem das Motorengehäuse in Umfangsrichtung bezüglich der Rotationsachse umschließenden Klemmband angeordnet. Bei als Handhabe ausgebildetem Führgriff läßt sich dieses Klemmband zweckmäßigerweise durch Einwirken auf den Führgriff gegenüber dem Motorengehäuse verspannen oder lösen.In a particularly simple embodiment, the guide handle is arranged on a clamping band surrounding the motor housing in the circumferential direction with respect to the axis of rotation. In the case of a guide handle designed as a handle, this clamping band can expediently be braced or released from the motor housing by acting on the guide handle.

Ist im Umfangsbereich des Motorengehäuses eine über den umfangseitigen Rand des jeweiligen Bearbeitungswerkzeuges hinausragende Anlagefläche vorgesehen, läßt sich das Gerät während eines Bearbeitungsvorganges problemlos an einer beliebigen Bezugsfläche anlegen und/oder entlangführen. Die Präzision der Bearbeitungsvorgänge wird dadurch in besonderen Fällen nochmals erhöht.If a contact surface is provided in the peripheral area of the motor housing and protrudes beyond the peripheral edge of the respective machining tool, the device can easily be placed on and / or guided along any reference surface during a machining process. This increases the precision of the machining processes even more in special cases.

Von Vorteil ist es, wenn das Gerät mit einer Absaugeinrichtung für Staub, Späne oder dergleichen Verunreinigungen, nachfolgend als Staub-Absaugeinrichtung bezeichnet, verbindbar ist. Dadurch werden der Arbeitsbereich wie auch die Umgebung wirkungsvoll vor Verschmutzung geschützt. Die Mittel zur Staubabsaugung sind allerdings in manchen Fällen einer Bearbeitung hinderlich und können zu einer Gewichtserhöhung des Gerätes beitragen. Damit diese Nachteile nicht auftreten, kann das Gerät ein Abdeckteil aufweisen, das in einer Abdeckposition unter teilweiser Abdeckung der Greiffläche am Handgriff lösbar festlegbar ist, wobei es einen im Arbeitsbereich des gehalterten Bearbeitungswerkzeuges mündenden Absaugkanal einer Staub-Absaugeinrichtung bildet und zugleich mit seiner Außenfläche als Greifflächenabschnitt an die Stelle der abgedeckten Handgriffspartie tritt.It is advantageous if the device can be connected to a suction device for dust, chips or similar contaminants, hereinafter referred to as a dust suction device. This effectively protects the work area as well as the environment from dirt. In some cases, however, the means for dust extraction are processing cumbersome and can contribute to an increase in weight of the device. So that these disadvantages do not occur, the device can have a cover part which can be detachably fixed in a cover position with partial covering of the gripping surface on the handle, wherein it forms a suction channel of a dust extraction device opening into the working area of the held processing tool and at the same time with its outer surface as a gripping surface section takes the place of the covered handle section.

Bei abgenommenem Abdeckteil liegt somit der Handgriff in seiner ursprünglichen Form vor. Zu Zeiten, zu denen eine Staubabsaugung gewünscht ist, braucht lediglich das Abdeckteil angebracht zu werden, wodurch ein Absaugkanal vorliegt, an dem sich beispielsweise ein Absauaggregat anschließen läßt. Da die Außenfläche des Abdeckteils Greifflächenfunktion übernimmt, ändert sich die Handhabung des Gerätes im Vergleich zum abgenommenen Abdeckteil nicht. Dies ist von Vorteil für den Anwender.When the cover is removed, the handle is in its original shape. At times when dust extraction is desired, only the cover part needs to be attached, so that there is a suction channel to which, for example, a suction unit can be connected. Since the outer surface of the cover part takes over the gripping surface function, the handling of the device does not change compared to the removed cover part. This is advantageous for the user.

Das abnehmbare Abdeckteil läßt sich bei praktisch allen motorisch angetriebenen Bearbeitungsgeräten oder Elektrowerkzeugen verwirklichen. Besonders vorteilhaft ist es allerdings im Zusammenhang mit einem Gerät der hier in Frage stehenden Art, bei dem die Gewichtseinsparung eine erhebliche Rolle spielt.The removable cover part can be realized with practically all motor-driven processing devices or power tools. However, it is particularly advantageous in connection with a device of the type in question here, in which the weight saving plays a significant role.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnung näher erläutert. In dieser zeigen:

Figur 1
eine erste Bauform des erfindungsgemäßen Gerätes in perspektivischer Darstellung bei abgenommenem Abdeckteil,
Figur 2
das Gerät der Figur 1 in einer Seitenansicht bei aufgesetztem in der Abdeckposition befindlichem Abdeckteil, wobei der Bereich des Führgriffes aufgebrochen dargestellt ist,
Figur 3
einen Querschnitt gemäß Schnittlinie III-III aus Fig. 2 und
Figur 4
eine Draufsicht auf das Gerät gemäß Fig. 2, wobei strichpunktiert beispielhaft mögliche Umfangspositionen des Führgriffes angedeutet sind.
The invention is explained in more detail below with reference to the accompanying drawing. In this show:
Figure 1
1 shows a first design of the device according to the invention in a perspective view with the cover part removed,
Figure 2
1 in a side view with the cover part in the cover position, the area of the guide handle being shown broken away,
Figure 3
a cross section along section line III-III of Fig. 2 and
Figure 4
3 shows a plan view of the device according to FIG. 2, with possible circumferential positions of the guide handle being indicated by dash-dotted lines.

Das in der Zeichnung abgebildete Gerät ist als Handgerät ausgebildet und wird zum Schleifen, Polieren, Bürsten, Entrosten oder sonstigen vergleichbaren Arbeiten an beliebigen Gegenstands-Oberflächen eingesetzt. Die Bearbeitungsart hängt hauptsächlich vom jeweils mit dem Gerät betriebenen Bearbeitungswerkzeug ab. Man könnte das Gerät auch als Handwerkzeugmaschine bezeichnen.The device shown in the drawing is designed as a hand-held device and is used for grinding, polishing, brushing, rust removal or other comparable work on any object surface. The type of processing mainly depends on the processing tool operated with the device. You could also call the device a hand tool.

Das Gerät besitzt ein Motorengehäuse 1 mit außen im wesentlichen kreiszylindrischer Gestalt. Die beiden Stirnflächen stellen hierbei die Oberseite 2 und die Unterseite 3 des Motorengehäuses 1 dar.The device has a motor housing 1 with a substantially circular cylindrical shape on the outside. The two end faces represent the top 2 and the bottom 3 of the motor housing 1.

Im Innern des Motorengehäuses 1 ist ein lediglich gestrichelt angedeuteter elektrischer Antriebsmotor 4 untergebracht, der über eine angetriebene Motorwelle 5 verfügt, die an der Unterseite 3 aus dem Motorengehäuse 1 herausragt.In the interior of the motor housing 1 there is accommodated an electric drive motor 4 which is only indicated by dashed lines and which has a driven motor shaft 5 which projects from the motor housing 1 on the underside 3.

Am freien Ende der Motorwelle 5 befindet sich ein lediglich gestrichelt angedeuteter Werkzeughalter 6, der beim Ausführungsbeispiel von einem mit einer Spannmutter zusammenarbeitenden Gewindeabschnitt gebildet ist. An ihm ist lösbar und koaxial ein scheibenförmiges Bearbeitungswerkzeug 7 festgelegt. Beim Ausführungsbeispiel handelt es sich um einen mit einem Schleifbelag 8 belegten Schleifteller.At the free end of the motor shaft 5 there is a tool holder 6, indicated only by dashed lines, which in the exemplary embodiment is formed by a threaded section which cooperates with a clamping nut. A disc-shaped machining tool 7 is detachably and coaxially fixed on it. The exemplary embodiment is a grinding plate covered with an abrasive coating 8.

Da das Bearbeitungswerkzeug 7 unmittelbar an der Motorwelle 5 festgelegt ist, ergibt sich ein kompakter aufbau, wobei sich der Antriebsmotor 4 zentral oberhalb des Bearbeitungswerkzeuges 7 befindet. Bevorzugt handelt es sich um eine getriebelose Anordnung, so daß die Motordrehzahl mit der Drehzahl des Bearbeitungswerkzeuges 7 übereinstimmt und sich gewichtserhöhende, im Betrieb geräuschvolle Getriebemittel wie kämmende Zahnräder erübrigen. Unter Beibehaltung der Vorteile könnte das Bearbeitungswerkzeug 7 auch auf einer linearen Verlängerung der Motorwelle 5 sitzen. Bevorzugt ist auf jeden Fall eine Anordnung, bei der die Rotationsachse 9 des Bearbeitungswerkzeuges 7 und Werkzeughalters 6 mit der Motorwelle 5, daß heißt deren Drehachse 13, zusammenfällt.Since the machining tool 7 is fixed directly to the motor shaft 5, a compact construction results, with the drive motor 4 being located centrally above the machining tool 7. It is preferably a gearless arrangement, so that the motor speed coincides with the speed of the machining tool 7 and there is no need for weight-increasing, noisy gear means such as meshing gears during operation. While maintaining the advantages, the machining tool 7 could also be seated on a linear extension of the motor shaft 5. In any case, an arrangement is preferred in which the axis of rotation 9 of the machining tool 7 and tool holder 6 coincides with the motor shaft 5, that is to say the axis of rotation 13 thereof.

Seitlich, im Bereich der vom zylindrischen Mantel gebildeten Umfangsfläche 14 des Motorengehäuses 1, ist ein Handgriff 15 angeordnet. Er ist fest und unlösbar mit dem Motorengehäuse 1 verbunden, insbesondere indem er einstückig mit dem Motorengehäuse 1 ausgebildet ist. Er verfügt beim Ausführungsbeispiel über eine im wesentlichen stabförmige Gestalt und verläuft winkelig zur Motorwelle 5, so daß er seitlich vom Motorengehäuse 1 absteht. In Draufsicht gemäß Figur 4 gesehen, verläuft die Längsachse 16 des Handgriffes 15 zweckmäßigerweise radial bezüglich der Umfangsfläche 14. In Seitenansicht gemäß Figur 2 gesehen kann die Längsachse 16 im rechten Winkel zur Drehachse 13 verlaufen, ist jedoch vorzugsweise, wie abgebildet, leicht schräg angestellt, so daß der Handgriff 15 zu seinem freien Ende 17 hin leicht nach oben ansteigt. Der Handgriff 15 setzt beim Ausführungsbeispiel in dem auf die Unterseite 3 folgenden Abschnitt der Umfangsfläche 14 an. Da seine in Höhenrichtung gemessene Breite geringer ist als die Höhe des Motorengehäuses 1, ragt dieses mit einem oberen zylindrischen Endabschnitt 18 über den Handgriff 15 vor.A handle 15 is arranged laterally, in the region of the peripheral surface 14 of the motor housing 1 formed by the cylindrical jacket. It is firmly and permanently connected to the motor housing 1, in particular in that it is formed in one piece with the motor housing 1. In the exemplary embodiment, it has an essentially rod-like shape and extends at an angle to the motor shaft 5, so that it projects laterally from the motor housing 1. 4, the longitudinal axis 16 of the handle 15 expediently runs radially with respect to the circumferential surface 14. In the side view according to FIG. 2, the longitudinal axis 16 can run at right angles to the axis of rotation 13, but is preferably, as shown, slightly inclined, so that the handle 15 rises slightly upwards towards its free end 17. In the exemplary embodiment, the handle 15 starts in the section of the peripheral surface 14 that follows the underside 3. Since its width measured in the height direction is less than the height of the motor housing 1, this protrudes with an upper cylindrical end section 18 over the handle 15.

Der Durchmesser des Bearbeitungswerkzeuges 7 entspricht zweckmäßigerweise zumindest im wesentlichen dem Durchmesser des Motorengehäuses 1.The diameter of the machining tool 7 expediently corresponds at least substantially to the diameter of the motor housing 1.

Das Gerät verfügt noch über einen zweiten Griff, der als Führgriff 19 bezeichnet ist, da er vom Anwender hauptsächlich zur Führung des Gerätes erfaßt wird.The device also has a second handle, which is referred to as a guide handle 19, since it is gripped by the user mainly for guiding the device.

Der starre Handgriff 15 hingegen dient eher dem Halten des Gerätes allgemein und zur Übertragung des Anpreßdruckes auf eine Oberfläche, an der das Bearbeitungswerkzeug 7 angelegt wird.The rigid handle 15, on the other hand, serves rather to hold the device in general and to transmit the contact pressure to a surface on which the machining tool 7 is applied.

Der Führgriff 19 ist ebenfalls seitlich, im Bereich der Umfangsfläche 14, am Motorengehäuse 1 angeordnet und steht von diesem quer zur Drehachse 13 insbesondere radial ab. Seine in Richtung zum freien Ende gemessene Längserstreckung ist geringer als diejenige des Handgriffes 15, er steht also weniger weit als dieser vom Motorengehäuse 1 ab. Beim Ausführungsbeispiel besitzt der Führgriff 19 eine im wesentlichen knopfartige Gestalt.The guide handle 19 is also arranged laterally, in the region of the circumferential surface 14, on the motor housing 1 and protrudes radially from the latter in particular radially to the axis of rotation 13. Its longitudinal extent, measured in the direction of the free end, is less than that of the handle 15, that is, it projects less than this from the motor housing 1. In the exemplary embodiment, the guide handle 19 has an essentially button-like shape.

Ein großer Vorteil des Führgriffes 19 besteht darin, daß er in Umfangsrichtung bezüglich der Rotationsachse 9 gegenüber dem Motorengehäuse 1 verstellbar ist. Die Verstellrichtung ist in Figuren 1 und 4 mit dem Doppelpfeil 20 angedeutet. In verschiedenen, sich im Rahmen der Verstellung ergebenden Umfangspositionen , läßt sich der Führgriff 19 jedoch bezüglich dem Motorengehäuse 1 lösbar festlegen, wobei er im festgelegten Zustand einen praktisch starren Griff bildet. Beim dargestellten Ausführungsbeispiel nimmt der Führgriff 19 eine dem Handgriff 15 diametral entgegengesetzte Umfangsposition 21 ein. Er steht also in entgegengesetzter Richtung wie der Handgriff 15 vom Motorengehäuse 1 ab. Ergänzend sind in Figur 4 strichpunktiert einige weitere mögliche Umfangspositionen 21', 21'' eingezeichnet.A great advantage of the guide handle 19 is that it is adjustable relative to the motor housing 1 in the circumferential direction with respect to the axis of rotation 9. The direction of adjustment is indicated in FIGS. 1 and 4 by the double arrow 20. In various circumferential positions resulting from the adjustment, however, the guide handle 19 can be releasably fixed with respect to the motor housing 1, forming a practically rigid handle in the fixed state. In the illustrated embodiment, the guide handle 19 assumes a circumferential position 21 diametrically opposite the handle 15. It stands in the opposite direction to the handle 15 from the motor housing 1. In addition, some further possible circumferential positions 21 ', 21''are shown in dash-dot lines in FIG.

Die Halterung des separaten Führgriffes 19 am Motorengehäuse 1 erfolgt beim Ausführungsbeispiel unter Vermittlung eines Klemmbandes 22. Dieses ist um das Motorengehäuse 1 in koaxialer Anordnung herumgelegt, wobei es sich in Umfangsrichtung bezüglich der Rotationsachse 9 und damit in Verstellrichtung 20 erstreckt und an der Umfangsfläche 14 anliegt. An einer Stelle des Umfanges des beim Ausführungsbeispiel in sich geschlossenen ringförmigen Klemmbandes 22 sitzt an der nach radial außen weisenden Bandfläche der Führgriff 19. Er ist vorzugsweise selbst als Handhabe für sein Verstellen in Verstellrichtung 20 und sein lösbares Festlegen gegenüber dem Motorengehäuse 1 ausgebildet. Durch Einwirken auf den Führgriff 19 kann das Klemmband 22 entweder derart gespannt werden, daß es gegenüber dem Motorgehäuse 1 unverrückbar festliegt, oder es kann gelöst werden, so daß es zusammen mit dem Führgriff 19 in Verstellrichtung 20 bis zur gewünschten Umfangsposition 21 gegenüber dem Motorengehäuse 1 verdrehbar ist.In the exemplary embodiment, the separate guide handle 19 is held on the motor housing 1 by means of a clamping band 22. This is placed around the motor housing 1 in a coaxial arrangement, wherein it extends in the circumferential direction with respect to the axis of rotation 9 and thus in the direction of adjustment 20 and bears against the circumferential surface 14 . At one point on the circumference of the annular clamping band 22, which in the exemplary embodiment is self-contained, sits on the band surface pointing radially outward. By acting on the guide handle 19, the clamping band 22 can either be tensioned such that it is immovably fixed relative to the motor housing 1, or it can be released so that it together with the guide handle 19 in the direction of adjustment 20 up to the desired circumferential position 21 relative to the motor housing 1 is rotatable.

Hierbei ist von Vorteil, daß sich der Führgriff 19 stufenlos verstellen läßt und in jeder möglichen Umfangsposition arretierbar ist. In Figur 4 sind lediglich einige der möglichen Umfangspositionen beispielhaft herausgegriffen.The advantage here is that the guide handle 19 can be adjusted continuously and can be locked in any possible circumferential position. In FIG. 4, only a few of the possible circumferential positions are selected as examples.

Damit das Klemmband 22 in Richtung der Rotationsachse 9 und damit in Höhenrichtung 23 des Gerätes eine klar definierte Stellung einnimmt, kann in die Umfangsfläche 14 eine nicht näher dargestellt, sich zumindest teilweise entlang der Umfangsfläche 14 erstreckende Vertiefung ausgebildet sein, in die das Klemmband 22 mit zumindest einem Teil seiner Dicke eintaucht. Die Flanken der Vertiefung bilden hierbei Anschläge, die das Klemmband 22 am Bewegen in Höhenrichtung 23 hindern, ohne die Bewegung in Verstellrichtung 20 zu stören.So that the clamping band 22 assumes a clearly defined position in the direction of the axis of rotation 9 and thus in the height direction 23 of the device, a not shown in the peripheral surface 14, at least partially along the peripheral surface 14 extending recess into which the clamping band 22 is immersed with at least part of its thickness. The flanks of the depression form stops which prevent the clamping band 22 from moving in the height direction 23 without disturbing the movement in the adjustment direction 20.

Der Aufbau des beim Ausführungsbeispiel vorgesehenen Führgriffes 19 soll nachfolgend erläutert werden. Demgemäß umfaßt er ein Gewindeteil 27, das sich ausgehend von der bereits erwähnten Aussenfläche 28 des Klemmbandes 22 radial nach außen erstreckt. Es ist beim Ausführungsbeispiel vom Schaft einer Schraube 29 gebildet, die mit der dem Schaft entgegengesetzten Kopffläche 30 auf die Aussenfläche 28 fest aufgesetzt ist. Zur festen Verbindung kann beispielsweise eine Schweiß- oder Klebeverbindung vorgesehen sein. Auf das Gewindeteil 27 ist ein Schraubteil 31 aufgesetzt, das sich durch Verdrehen gemäß in Figur 1 eingezeichnetem Doppelpfeil 32 auf dem Gewindeteil 27 hin und her schrauben läßt. Beim Ausführungsbeispiel hat es die Gestalt einer Kugel.The structure of the guide handle 19 provided in the exemplary embodiment will be explained below. Accordingly, it comprises a threaded part 27 which, starting from the already mentioned outer surface 28 of the clamping band 22, extends radially outwards. In the exemplary embodiment, it is formed by the shaft of a screw 29 which is fixedly placed on the outer surface 28 with the head surface 30 opposite the shaft. For example, a welded or adhesive connection can be provided for the firm connection. A screw part 31 is placed on the threaded part 27 and can be screwed back and forth on the threaded part 27 by turning it according to the double arrow 32 shown in FIG. In the embodiment it has the shape of a ball.

Im Bereich zwischen dem Schraubteil 31 und dem Klemmband 22 befindet sich noch ein Drückelement 33, das sich einerseits am Schraubteil 31 und andererseits an der Umfangsfläche 14 des Motorengehäuses 1 abstützt. Es ist beim Ausführungsbeispiel hülsenförmig ausgebildet und axial verstellbar auf die Schraube 29 aufgesteckt.In the area between the screw part 31 and the clamping band 22 there is also a pressing element 33, which is supported on the one hand on the screw part 31 and on the other hand on the peripheral surface 14 of the motor housing 1. In the exemplary embodiment, it is sleeve-shaped and axially adjustably attached to the screw 29.

Seine mit dem Schraubteil 31 zusammenarbeitende Drückfläche 34 ist beim Ausführungsbeispiel sphärisch komplementär zur Kugelgestalt ausgebildet, damit die Drückkraft optimal übertragen wird. An der entgegengesetzten Seite, im Bereich des Klemmbandes 22, ist das Drückelement 33 mit einer in Band-Längsrichtung durchgehenden Ausnehmung 35 versehen, in die das Klemmband 22 eintauchen kann, wobei die neben der Ausnehmung 35 liegenden Partien des Drückelements 33 Drückpartien 36 bilden, die sich gegen die Umfangsfläche 14 stützen.Its pressing surface 34 cooperating with the screw part 31 is spherically complementary to the spherical shape in the exemplary embodiment, so that the pressing force is optimally transmitted. On the opposite side, in the area of the clamping band 22, the pressing element 33 is provided with a recess 35 which is continuous in the longitudinal direction of the band and into which the clamping band 22 can dip, the parts of the pressing element 33 lying next to the recess 35 forming pressing parts 36 which support against the peripheral surface 14.

Die das Aufstecken auf das Schraubteil 31 erlaubende Durchgangsöffnung 37 des Drückelements 33 ist im an die Ausnehmung 35 angrenzenden Bereich derart erweitert, daß auch der Schraubenkopf Aufnahme findet.The through opening 37 of the pressing element 33, which allows it to be plugged onto the screw part 31, is widened in the area adjacent to the recess 35 in such a way that the screw head is also received.

Somit ist also der Führgriff 19 des Ausführungsbeispiels als Drehgriff ausgebildet. Indem man das Schraubteil 31 auf das Gewindeteil 27 aufschraubt, wird das Drückelement 33 mit seinen Drückpartien 36 gegen die Umfangsfläche 14 gedrückt, wobei in Folge dieser Abstützung das mit dem Gewindeteil 27 verbundene Klemmband 22 im Verbindungsbereich mit dem Gewindeteil 27 nach radial außen gezogen wird. Auf diese Weise wird das Klemmband 22 vor allem in den dem Führgriff 19 diametral entgegengesetzten Bereichen gegen das Motorengehäuse 1 gespannt.Thus, the guide handle 19 of the embodiment is designed as a rotary handle. By screwing the screw part 31 onto the threaded part 27, the pressing element 33 with its pressing parts 36 is pressed against the peripheral surface 14, as a result of this support the clamping band 22 connected to the threaded part 27 being pulled radially outward in the connection area with the threaded part 27. In this way, the clamping band 22 is tensioned against the motor housing 1, particularly in the regions diametrically opposite the guide handle 19.

Um eine andere Umfangsposition des Führgriffes 19 einzustellen, braucht lediglich das Schraubteil 31 kurzzeitig gelöst und anschließend der Führgriff 19 zusammen mit dem Klemmband 22 bis zur gewünschten Umfangsposition verschoben werden, wo man das Schraubteil 31 in der beschriebenen Weise wieder festzieht. Vorteilhaft ist hierbei, daß die Verstellung mit einer Hand erfolgen kann, selbst während eines Bearbeitungsvorganges, und ohne den Führgriff 19 vorrübergehend loslassen zu müssen.In order to set a different circumferential position of the guide handle 19, only the screw part 31 needs to be loosened briefly and then the guide handle 19 together with the clamping band 22 to can be moved to the desired circumferential position, where the screw part 31 is tightened again in the manner described. The advantage here is that the adjustment can be done with one hand, even during a machining operation, and without having to let go of the guide handle 19 temporarily.

Beim Ausführungsbeispiel erstreckt sich der Verstellbereich des Führgriffes 19 über 360 Grad. Er läßt sich also an jeder beliebigen Stelle entlang der Umfangsfläche 14 anordnen. Beim Ausführungsbeispiel ist ist der Führgriff 19 in Höhenrichtung 23 gesehen auf gleicher Höhe wie die Ansetzstelle des Handgriffes 15 angeordnet. Wie aus Figur 2 gut ersichtlich ist, nimmt der Führgriff 19 etwa eine Position im Bereich der Höhenmitte des Handgriffes 15 ein. Die in Höhenrichtung 23 gemessene Breite des Führgriffes 19 ist geringer als die entsprechend gemessene Breite des sich unmittelbar an das Motorengehäuse 1 anschließenden Abschnittes 38 des Handgriffes 15. Dieser Abschnitt 38 ist mit einer in Umfangsrichtung bezüglich der Rotationsachse 9 den Handgriff 15 durchquerenden Aufnahmeöffnung 39 versehen. Deren Querschnittskontur ist so gewählt, daß der Führgriff 19 hindurchpaßt. Sie schließt sich unmittelbar an die Umfangsfläche 14 des Motorengehäuses 1 an, das also im Höhenbereich der Aufnahmeöffnung 39 einen kreiszylindrischen Umfangsabschnitt 40 besitzt. Um diesen Umfangsabschnitt 40 ist das Klemmband 20 herumgeschlungen, das also durch die Aufnahmeöffnung 39 hindurchläuft. Oberhalb und unterhalb der Aufnahmeöffnung 39 befinden sich stegartige Griffpartien 44, 44', über die der Handgriff 15 mit dem Motorengehäuse 1 fest verbunden ist.In the exemplary embodiment, the adjustment range of the guide handle 19 extends over 360 degrees. It can therefore be arranged at any point along the peripheral surface 14. In the exemplary embodiment, the guide handle 19 is arranged at the same height as the attachment point of the handle 15, viewed in the height direction 23. As can be clearly seen from FIG. 2, the guide handle 19 assumes a position in the region of the middle of the height of the handle 15. The width of the guide handle 19 measured in the height direction 23 is less than the correspondingly measured width of the section 38 of the handle 15 directly adjoining the motor housing 1. This section 38 is provided with a receiving opening 39 which passes through the handle 15 in the circumferential direction with respect to the axis of rotation 9. Their cross-sectional contour is selected so that the handle 19 fits through. It connects directly to the peripheral surface 14 of the motor housing 1, that is, one in the height region of the receiving opening 39 has circular cylindrical peripheral portion 40. The clamping band 20 is wrapped around this circumferential section 40 and thus runs through the receiving opening 39. Above and below the receiving opening 39 there are web-like handle parts 44, 44 ', via which the handle 15 is firmly connected to the motor housing 1.

Auf diese Weise kommt der Führgriff 19 sehr nahe am Bearbeitungswerkzeug 7 und damit am Arbeitsbereich 45 des Geräts zu Liegen. Dies gestattet ein präzises Führen des Geräts bei einem Bearbeitungsvorgang. Zugleich besteht aber die Möglichkeit, den Führgriff 19 unbehindert vom Handgriff 15 an jeder Stelle des Umfanges des Motorengehäuses 1 zu positionieren.In this way, the guide handle 19 comes to lie very close to the machining tool 7 and thus to the working area 45 of the device. This allows the device to be guided precisely during a machining operation. At the same time, there is the possibility of positioning the guide handle 19 freely at any point on the circumference of the motor housing 1 by the handle 15.

Die eigentliche Aufgabe der Aufnahmeöffnung 39 besteht aber darin, den Führgriff 19 in einer Ruhestellung aufzunehmen, wenn er in Folge besonderer Gegebenheiten im Rahmen der momentanten Bearbeitung nicht benötigt wird oder hinderlich ist. Diese Ruhestellung ist in Figur 4 bei 21'' dargestellt. Hier kommt der Führgriff 19 vollständig versenkt im Handgriff 15 zum Liegen, so daß das Gerät ohne aufwendiges Abnehmen des Führgriffes 19 eine Gestalt aufweist, die derjenigen eines führgrifflosen Gerätes entspricht.The actual task of the receiving opening 39 is, however, to receive the guide handle 19 in a rest position if, owing to special circumstances, it is not required or is a hindrance in the context of the current processing. This rest position is shown in FIG. 4 at 21 ″. Here, the guide handle 19 comes to rest completely sunk in the handle 15, so that the device has a shape which corresponds to that of a handle-less device without complex removal of the handle 19.

Da die Aufnahmeöffnung 39 zu beiden Seiten des Handgriffes 15 hin offen ist, ist der Führgriff 19 und insbesondere sein Schraubteil 31 problemlos zugänglich, um in der Ruhestellung 21'' ein Festklemmen gegenüber dem Motorengehäuse 1 sowie ein späteres erneutes Lösen vornehmen zu können. Es kann auch zweckmäßig sein, die Breite des Führgriffes 19 so auf die Breite des Handgriffes 15 abzustimmen, daß das Schraubteil 31 in der Ruhestellung 21'' leicht beidseits über die seitlichen Außenflächen 46 des Handgriffes 15 übersteht und dadurch gut erfaßbar ist (nicht dargestellt).Since the receiving opening 39 is open on both sides of the handle 15, the guide handle 19 and in particular its screw part 31 are easily accessible in order to be in the rest position 21 '' to clamp against the motor housing 1 and to be able to loosen it again later. It may also be expedient to match the width of the guide handle 19 to the width of the handle 15 in such a way that the screw part 31 in the rest position 21 ″ slightly projects beyond the lateral outer surfaces 46 of the handle 15 on both sides and is therefore easy to grasp (not shown). .

Während beim dargestellten Ausführungsbeispiel die Aufnahmeöffnung 39 abgesehen von den seitlichen Öffnungen ringsum geschlossen ist, ist sie bei einem nicht näher dargestellten Ausführungsbeispiel an einer Stelle ihres Umfanges offen, insbesondere zur Oberseite 2 hin. Dies gestattet eine noch bessere Handhabung des Führgriffes 19 in der Ruhestellung 21'' .While in the illustrated embodiment the receiving opening 39 is closed apart from the lateral openings, in an embodiment not shown it is open at one point on its circumference, in particular towards the top 2. This allows an even better handling of the guide handle 19 in the rest position 21 ″.

Das abgebildete Gerät ist desweiteren noch mit einer Anlagefläche 47 versehen, mit der es sich während eines Bearbeitungsvorganges an einer beispielsweise vom zu bearbeitenden Gegenstand gebildeten Bezugsfläche anlegen und/oder entlang verschieben läßt. Beim Ausführungsbeispiel sind zwei solcher Anlageflächen 47 vorgesehen, die spiegelbildlich bezüglich einer die Rotationsachse 9 und die Längsachse 16 enthaltenden Vertikalebene angeordnet sind. Die jeweilige Anlagefläche 47 befindet sich im Bereich der Unterseite 3 des Motorengehäuses 1, wobei sie wie abgebildet durchaus in Richtung zum Bearbeitungswerkzeug 7 über das Motorengehäuse 1 vorstehen kann.The device shown is furthermore provided with a contact surface 47 with which it can be applied and / or displaced along a reference surface formed, for example, by the object to be processed during a machining operation. In the exemplary embodiment, two such contact surfaces 47 are provided, which are arranged in mirror image with respect to a vertical plane containing the axis of rotation 9 and the longitudinal axis 16. The respective contact surface 47 is located in the area of the underside 3 of the motor housing 1, and as shown it can protrude in the direction of the machining tool 7 via the motor housing 1.

Die Anlagefläche 47 ragt überdies zweckmäßigerweise über den umfangsseitigen Rand 49 des jeweiligen Bearbeitungswerkzeuges 7 radial hinaus, wie dies vor allem aus Figur 4 ersichtlich ist.The contact surface 47 also expediently protrudes radially beyond the peripheral edge 49 of the respective machining tool 7, as can be seen above all from FIG.

Bevorzugt ist die jeweilige Anlagefläche 47 als ebene Fläche ausgebildet, die in einer an das Bearbeitungswerkzeug 7 oder das Motorengehäuse 1 angelegten Tangentialebene oder einer hierzu parallelen Ebene verläuft. Beim Ausführungsbeispiel beginnt die jeweilige Anlagefläche 47 an einer Stelle 50 der Umfangsfläche 14 beidseits der erwähnten Verikalebene und erstreckt sich ausgehend von dort in Richtung des Handgriffes 15, wobei ihr Abstand von der Längsachse 16 mit zunehmender Entfernung von der Umfangssfläche 14 zunimmt. Die Anlageflächen 47 sind zweckmäßigerweise integral an das Motorengehäuse 1 und/oder den Handgriff 15 angeformt.The respective contact surface 47 is preferably designed as a flat surface which runs in a tangential plane applied to the machining tool 7 or the motor housing 1 or in a plane parallel thereto. In the exemplary embodiment, the respective contact surface 47 begins at a point 50 of the peripheral surface 14 on both sides of the vertical plane mentioned and extends from there in the direction of the handle 15, its distance from the longitudinal axis 16 increasing with increasing distance from the peripheral surface 14. The contact surfaces 47 are expediently formed integrally on the motor housing 1 and / or the handle 15.

Das abgebildete Gerät ist vorzugsweise auch für den Staubabsaugbetrieb ausgelegt. Es besteht die Möglichkeit, ein nicht näher dargestelltes Absaugaggregat anzuschließen und dadurch im Arbeitsbereich 45 anfallenden Abrieb, nachfolgend als Staub bezeichnet, aus dem Arbeitsbereich 45 gefaßt zu entfernen. Dabei besteht die vorteilhafte Möglichkeit, das Gerät ohne Einbußen hinsichtlich der Handhabbarkeit wahlweise mit oder ohne entsprechende, der Staubabsaugung dienende Mittel zu betreiben. In vielen Fällen sind derartige Mittel hinderlich oder führen zu einer bei feinen Bearbeitungsvorgängen nachteiligen Gewichtserhöhung, so daß es vorteilhaft ist, wenn die Mittel bei Nichtgebrauch entfernt werden können.The device shown is preferably also designed for dust extraction. It is possible to connect a suction unit (not shown in more detail) and to remove abrasion occurring in the work area 45, hereinafter referred to as dust, from the work area 45. In this case, there is the advantageous possibility of operating the device either with or without corresponding means for dust extraction, without sacrificing manageability. In many cases, such means are a hindrance or lead to a disadvantageous increase in weight in fine machining operations, so that it is advantageous if the agents can be removed when not in use.

Als der Staubabsaugung dienendes Mittel ist beim abgebildeten Gerät ein Abdeckteil 51 vorgesehen. Es läßt sich in einer aus den Figuren 2 und 3 gut ersichtlichen Abdeckposition lösbar am Handgriff 15 anbringen. Die Greiffläche 52 des Handgriffes 15, also diejenige sich über den Umfang des Handgriffes 15 erstreckende Fläche, die vom Anwender bei der Handhabung des Geräts normalerweise von einer Hand umgriffen wird, wird in der Abdeckposition vom Abdeckteil 51 teilweise abgedeckt. Beim Ausführungsbeispiel ist dies im wesentlichen die nach unten weisende Partie 53 der Greiffläche 52, da das Abdeckteil 51 in der Abdeckposition an der dem Arbeitsbereich zugewandten Unterseite des Handgriffes 15 sitzt. Die Gestaltung des Abdeckteils 51 ist hierbei so auf die Form des Handgriffes 15 abgestimmt, daß diese beiden Teile zwischen sich einen im Arbeitsbereich 45 mündenden Absaugkanal 54 begrenzen, der zu einer Staub-Absaugeinrichtung gehört. Beim Ausführungsbeispiel besitzt das Abdeckteil 51 eine aus Figur 3 ersichtliche rinnenartige Querschnittskontur, wobei der Absaugraum einerseits von der konkav gekrümmten Innenfläche 55 des Abdeckteils 51 und andererseits unmittelbar von der abgedeckten Greifflächenpartie 53 begrenzt wird.A cover part 51 is provided as the means for dust extraction in the device shown. It can be detachably attached to the handle 15 in a covering position that is clearly visible in FIGS. 2 and 3. The gripping surface 52 of the handle 15, that is to say that surface which extends over the circumference of the handle 15 and which the user normally grips with one hand when handling the device, is partially covered in the covering position by the covering part 51. In the exemplary embodiment, this is essentially the downward-facing part 53 of the gripping surface 52, since the cover part 51 sits in the cover position on the underside of the handle 15 facing the work area. The design of the cover part 51 is matched to the shape of the handle 15 in such a way that these two parts delimit between them a suction channel 54 which opens into the working area 45 and which belongs to a dust suction device. In the exemplary embodiment, the cover part 51 has a groove-like cross-sectional contour which can be seen in FIG. 3, the suction space being delimited on the one hand by the concavely curved inner surface 55 of the cover part 51 and on the other hand directly by the covered gripping surface part 53.

Das Abdeckteil 51 ist so ausgebildet, daß der Absaugkanal 54 im wesentlichen dem Längsverlauf des Handgriffes 15 folgt und bei Annäherung an das Motorengehäuse 1 in einem Bogenabschnitt 56 nach unten zum Arbeitsbereich 45 verläuft.The cover part 51 is designed such that the suction channel 54 essentially follows the longitudinal profile of the handle 15 and, when approaching the motor housing 1, runs downward in an arcuate section 56 to the working area 45.

In Draufsicht gemäß Figur 4 gesehen, entspricht die Breite des Absaugkanales 54 im wesentlichen der Breite des Handgriffes 15. Erst im Bereich des Bogenabschnittes 56 verbreitert sich der Absaugkanal 54 und mündet in einer Absaugöffnung 57, die sich bogenförmig entlang eines Umfangsabschnittes des Bearbeitungswerkzeuges 7 erstreckt. Im Bereich der Absaugöffnung 57 kann das Abdeckteil 51 mit einem Dichtbessatz 58 versehen sein, der beim Ausführungsbeispiel von einem Borstenteilkranz gebildet ist.4, the width of the suction channel 54 corresponds essentially to the width of the handle 15. Only in the area of the arc section 56 does the suction channel 54 widen and open into a suction opening 57 which extends in an arc along a peripheral section of the machining tool 7. In the area of the suction opening 57, the cover part 51 can be provided with a sealing trim 58, which in the exemplary embodiment is formed by a bristle partial ring.

Am der Absaugöffnung 57 entgegengesetzten rückwärtigen Ende kann das Abdeckteil 51 einen Verbindungsabschnitt 59 aufweisen, über den beispielsweise eine zu einem Absaugaggregat führende flexible Absaugleitung anschließbar ist.At the rear end opposite the suction opening 57, the cover part 51 can have a connecting section 59, via which, for example, a flexible suction line leading to a suction unit can be connected.

Im Bereich des Handgriffes 15 verfügt das Abdeckteil 51 zweckmäßigerweise über eine abgerundete Außenfläche 60. Diese tritt in der Abdeckposition an die Stelle der abgedeckten Greifflächenpartie 53, so daß sie Greifflächenfunktion erfüllt und das Abdeckteil 51 praktisch zum Handgriff 15 gehört.In the area of the handle 15, the cover part 51 expediently has a rounded outer surface 60. In the cover position, this takes the place of the covered gripping surface part 53, so that it fulfills the gripping surface function and the cover part 51 practically belongs to the handle 15.

Ob mit oder ohne Abdeckteil 51, das Gerät läßt sich immer angenehm greifen.Whether with or without cover 51, the device can always be gripped comfortably.

Die lösbare Montage des Abdeckteils 51 am Handgriff 15 erfolgt beim Ausführungsbeispiel unter Vermittlung einer Steckverbindungseinrichtung 61. Hierzu ist am Handgriff 15 im Bereich der beiden seitlichen Außenflächen 46 jeweils eine Längsnut 62 vorgesehen, die parallel zur Längsachse 16 verlaufen. In die Längsnut 62 greift das Abdeckteil 51 mit Haltevorsprüngen 64 ein, die im Bereich der Längsöffnung 63 an den Randbereichen des Abdeckteils 51 ausgebildet sind. Wenn die Längsnuten 62 zum freien Ende 17 hin offen sind, können die Haltevorsprünge 64 problemlos von dort aus eingeschoben werden.The detachable mounting of the cover part 51 on the handle 15 takes place in the exemplary embodiment by means of a plug connection device 61. For this purpose, a longitudinal groove 62 is provided on the handle 15 in the area of the two lateral outer surfaces 46, which run parallel to the longitudinal axis 16. The cover part 51 engages in the longitudinal groove 62 with holding projections 64 which are formed in the region of the longitudinal opening 63 at the edge regions of the cover part 51. If the longitudinal grooves 62 are open towards the free end 17, the retaining projections 64 can be inserted from there without any problems.

Im Bereich des Bogenabschnittes 56 wird die schlitzartige Längsöffnung 63 des Abdeckteils 51 zweckmäßigerweise von einer geräteseitigen Leitfläche 65 abgedeckt.In the area of the curved section 56, the slot-like longitudinal opening 63 of the cover part 51 is expediently covered by a device-side guide surface 65.

Ein wie beim Ausführungsbeispiel über das freie Ende 17 hinausragender Endabschnitt 66 des Abdeckteils 51 ist zweckmäßigerweise rohrförmig über den Umfang geschlossen ausgebildet, damit kein Druckabfall entsteht.An end section 66 of the cover part 51 protruding beyond the free end 17, as in the exemplary embodiment, is expediently designed to be tubular over the circumference, so that no pressure drop occurs.

Es versteht sich, daß das Abdeckteil 51 prinzipiell über die gesamte Länge als rohrförmiges Teil ausgebildet sein kann, wobei gegebenenfalls vorhandene Haltevorsprünge 64 im Bereich der Außenfläche angeformt sein können. Auch ist es möglich, die Längsöffnung 63 an beiden Schmalseiten geschlossen auszuführen, so daß das Abdeckteil 51 im Bereich beider Endabschnitte eine rohrförmige Gestalt hat. Die Haltevorsprünge 64 erstrecken sich in diesem Falle z.B.lediglich über die Länge der Längsöffnung 63.It goes without saying that the cover part 51 can in principle be formed as a tubular part over the entire length, with any holding projections 64 present in the area the outer surface can be molded. It is also possible to make the longitudinal opening 63 closed on both narrow sides, so that the cover part 51 has a tubular shape in the region of both end sections. In this case, the holding projections 64 only extend over the length of the longitudinal opening 63, for example.

Die oben erwähnten Anlageflächen 47 können zumindest teilweise auch am Abdeckteil 51 vorgesehen sein. Dies ermöglicht eine problemlose Entfernung vom Gerät, falls sie sich als hinderlich herausstellen sollten.The abovementioned contact surfaces 47 can also be at least partially provided on the cover part 51. This allows for easy removal from the device should they prove to be a hindrance.

Es sei noch darauf hingewiesen, daß sich das beschriebene Abdeckteil auch im Zusammenhang mit anderen Handwerkzeugmaschinen vorteilhaft einsetzen läßt, unabhängig von deren sonstiger Ausgestaltung. Selbst bei Maschinen mit nicht rotierendem Bearbeitungswerkzeug, beispielsweise bei Stichsägen, ließe sich diese für die Staubabsaugung vorteilhafte Maßnahme ohne weiteres verwirklichen.It should also be pointed out that the cover part described can also be used advantageously in connection with other hand power tools, regardless of their other configuration. Even with machines with a non-rotating processing tool, for example with jigsaws, this measure, which is advantageous for dust extraction, can be easily implemented.

Zum abgebildeten Gerät ist noch nachzutragen, daß das Motorengehäuse 1 und der Handgriff 15 zweckmäßigerweise ein Gerätegehäuse bilden, das mittig entlang der oben erwähnten Vertikalebene geteilt ist (bei 67), wobei sich die beiden Gehäusehälften 68 zu Reparatur- und Montagezwecken voneinander lösen lassen.For the device shown it must also be added that the motor housing 1 and the handle 15 advantageously form a device housing which is divided in the middle along the above-mentioned vertical plane (at 67), the two housing halves 68 being detachable from one another for repair and assembly purposes.

Claims (16)

  1. Motor-driven tool in the form of a hand-operated tool for grinding, polishing, derusting or similar machining of surfaces, with a drive motor (4) mounted in a motor housing (1) and having a motor shaft (5) rotating in operation which drives a toolholder (6) for a machining tool (7), in particular disc-shaped, with a handle (15) for holding the tool connected to the motor housing (1), and with an additional guide grip (19) located along the axis of rotation of the toolholder at least approximately at the same height as the handle (15) and protruding sideways from the motor housing (1), connected to the motor housing (1) so as to be adjustable in the peripheral direction (20) relative to the axis of rotation (9) of the toolholder (6) and which may be releasably attached to the latter in various peripheral positions (21, 21', 21''), characterized in that the handle (15) runs at an angle to the motor shaft and projects sideways from the motor housing (1), and that the handle (15) has a locating aperture in the adjustment path of the guide grip (19), in which the guide grip (19) may be at least partly recessed.
  2. Device according to claim 1, characterized in that the guide grip (19) is arranged on the motor housing (1) so as to be infinitely adjustable and may be fixed in any peripheral position (21, 21', 21'') relative to the motor housing (1).
  3. Device according to claim 1 or 2, characterized in that the range of adjustment extends over 360°.
  4. Device according to any of claims 1 to 3, characterized in that the locating aperture (39) crosses the handle (15) in the peripheral direction (20) relative to the axis of rotation (9), so that the recessed guide grip (19) is accessible from either side.
  5. Device according to any of claims 1 to 4, characterized in that the guide grip (19) as part of its adjustment is moveable through the locating aperture (39).
  6. Device according to any of claims 1 to 5, characterized in that the guide grip (19) projects a shorter distance from the motor housing (1) than the longer handle (5).
  7. Device according to any of claims 1 to 6, characterized in that the guide grip (19) itself is designed as a handle for its adjustment and releasable fixing relative to the motor housing (1), and in particular is designed as a rotatable twist grip for releasing or fixing, with its axis of rotation expediently coinciding with the direction in which it projects from the motor housing (1).
  8. Device according to any of claims 1 to 7, characterized in that the guide grip (19) rests on a clamping band (22) encompassing the motor housing (1) in the peripheral direction (20) relative to the axis of rotation (9) and expediently extending through the locating aperture (39).
  9. Device according to any of claims 1 to 8, characterized in that, in the peripheral area of the motor housing (1), in particular in the area of the machining tool (7) fixed to the toolholder (6), there is provided a contact surface (47) extending beyond the peripheral-side edge (49) of the respective machining tool (7), with which the tool can make contact during a machining operation on e.g. a reference surface formed by the object to be machined.
  10. Device according to claim 9, characterized in that the contact surface (47) is smooth and in particular runs in a tangential plane laid against the machining tool (7) or the cylindrical motor housing (1) or in a parallel plane thereto.
  11. Device according to any of claims 1 to 10, characterized in that there is a cover section (51), releasably locatable on the handle (15) in a covering position partially covering a gripping surface (52) provided on the handle (15), and forming an extraction duct (54) of a dust-extraction unit opening out in the working area (45) of the mounted machining tool (7), while at the same time its outer surface (60) forms a gripping surface section at the point of the covered handle section (53).
  12. Device according to claim 11, characterized in that the cover section (51) mounted on the handle forms at least one part of the extraction duct (54) in conjunction with covered sections (53) of the gripping surface (52) of the handle (15).
  13. Device according to claim 11 or 12, characterized in that the cover section (51) can be fixed on the handle (15) as part of a plug- and/or snap connection, for which purpose two longitudinal grooves (62) may be provided on opposite sides of the handle (15), and in which the cover section (51) may be inserted with retaining projections (64) formed in particular by the edge areas of a longitudinal-side opening (63).
  14. Device according to any of claims 11 to 13, characterized in that the cover section (51) rests in the covering position on the underside of the handle (15) facing the working area (45).
  15. Device according to any of claims 1 to 14, characterized in that the cover section (51) has an essentially grooved cross-sectional contour.
  16. Device according to any of claims 11 to 15 in conjunction with claim 9 or 10, characterized in that the contact surface (47) is wholly or partly formed on the cover section (51).
EP93100473A 1992-02-05 1993-01-14 Motor driven appliance being designed as handhold appliance for grinding, polishing, derosting or suchlike treatment of surfaces Expired - Lifetime EP0558893B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203171A DE4203171C1 (en) 1992-02-05 1992-02-05
DE4203171 1992-02-05

Publications (3)

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EP0558893A2 EP0558893A2 (en) 1993-09-08
EP0558893A3 EP0558893A3 (en) 1993-12-08
EP0558893B1 true EP0558893B1 (en) 1996-05-01

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EP93100473A Expired - Lifetime EP0558893B1 (en) 1992-02-05 1993-01-14 Motor driven appliance being designed as handhold appliance for grinding, polishing, derosting or suchlike treatment of surfaces

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EP (1) EP0558893B1 (en)
DE (3) DE4238245C3 (en)

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EP4209305A1 (en) * 2022-01-11 2023-07-12 Basso Industry Corp. Portable grinding tool and casing structure thereof

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FR2734745B1 (en) * 1995-05-29 1997-07-04 Peugeot SUCTION DEVICE FOR DETACHED MATERIALS DURING MACHINING, ADAPTABLE TO A MACHINE TOOL.
DE19606535C2 (en) * 1996-02-22 1999-01-07 Metabowerke Kg Motor-operated hand tool with removable handle
DE19623152C1 (en) * 1996-06-10 1997-08-28 Alois Steffgen External exhaustion system for abrasive tool
DE19854468A1 (en) * 1998-11-25 2000-06-08 Flex Elektrowerkzeuge Gmbh Hand tool
US6260591B1 (en) 1999-08-11 2001-07-17 Black & Decker Inc. Biscuit joiner
JP5297392B2 (en) * 2009-07-06 2013-09-25 株式会社マキタ Thunder

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EP0191509A1 (en) * 1985-01-18 1986-08-20 Guido Valentini Portable electrical milling and/or trimming machine tool for the machining with suction of produced chips and dust
EP0227644A2 (en) * 1985-01-18 1987-07-01 Guido Valentini Portable electrical machine tool for the machining of surfaces of materials with dust discharge duct included in the gripping handle
EP0252552A1 (en) * 1986-07-02 1988-01-13 Guido Valentini Manual electrical tool with motor and dust suction means incorporated in the handle

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JPS55112759A (en) * 1979-02-19 1980-08-30 Shibaura Eng Works Co Ltd Disk grinder
DE3038489C2 (en) * 1980-10-11 1984-01-26 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Hand machine tool with a rotating tool
DE8228297U1 (en) * 1982-10-08 1983-01-20 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen DEVICE DESIGNED AS A HAND DEVICE FOR GRINDING, POLISHING, RUSTROOFING. DGL. EDITING SURFACES
SE446698B (en) * 1983-09-16 1986-10-06 Atlas Copco Ab "HANDLING MACHINE TOOLS INCLUDING A MOTOR HOUSE AND TWO HOUSE FITTED HANDLES OF ANY ATMINSTONE THAT ARE ADJUSTABLE TO YOU"
DE3724747A1 (en) * 1987-07-25 1989-02-02 Fein C & E GRINDING DEVICE WITH DUST EXTRACTION DEVICE

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EP0191509A1 (en) * 1985-01-18 1986-08-20 Guido Valentini Portable electrical milling and/or trimming machine tool for the machining with suction of produced chips and dust
EP0227644A2 (en) * 1985-01-18 1987-07-01 Guido Valentini Portable electrical machine tool for the machining of surfaces of materials with dust discharge duct included in the gripping handle
EP0252552A1 (en) * 1986-07-02 1988-01-13 Guido Valentini Manual electrical tool with motor and dust suction means incorporated in the handle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4209305A1 (en) * 2022-01-11 2023-07-12 Basso Industry Corp. Portable grinding tool and casing structure thereof

Also Published As

Publication number Publication date
EP0558893A3 (en) 1993-12-08
EP0558893A2 (en) 1993-09-08
DE4238245A1 (en) 1993-08-19
DE4238245C3 (en) 1996-04-25
DE59302409D1 (en) 1996-06-05
DE4238245C2 (en) 1994-01-20
DE4203171C1 (en) 1993-06-09

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