WO2019219780A1

WO2019219780A1 - Surface machining system

Info

Publication number: WO2019219780A1
Application number: PCT/EP2019/062542
Authority: WO
Inventors: Matthias KÜBELER; Stefan Scharpf
Original assignee: Festool Gmbh
Priority date: 2018-05-16
Filing date: 2019-05-15
Publication date: 2019-11-21
Also published as: DE102018111837A1; EP3793778A1

Abstract

The invention relates to a surface machining system for coating and/or abrasively machining a surface of a workpiece or a space (RA), having a work device (50) which is mobile with respect to the surface (FL, FR, FF, FD) and which has a tool holder (58), which is or can be driven by a drive motor (53), for a work tool (90A, 90F) for machining the surface (FL, FR, FF, FD), and/or a coating unit (980) for coating the surface (FL, FR, FF, FD), wherein the work device (50) has a suction unit (70) for suctioning the work device (50) onto the surface (FL, FR, FF, FD) with at least one force component oriented in a normal direction (N) of the surface (FL, FR, FF, FD). According to the invention, the surface machining system has at least one holding unit (20) which can be fixed with respect to the surface (FL, FR, FF, FD), said holding unit being connected to the work device (50) by at least one flexible traction member (30).

Description

Surface Treatment System

The invention relates to a surface treatment system for coating and / or abrasive machining of a surface of a workpiece or a space with a movable work surface with respect to the surface, a powered by a drive motor tool holder for a working tool for processing the surface and / or a coating device for coating the surface, wherein the working device has a suction device for sucking the working device against the surface with at least one force component oriented in a normal direction of the surface. For surface processing of, for example, room walls, so-called long-necked sander, i. Working devices are known which have a long, rod-shaped handle in order to guide the working device along a respective surface to be worked on. For the operator, the handling is usually quite exhausting. Although the working device is facilitated by a suction device, for example, corresponding intake air inlet openings on a working surface of a disk tool, which is arranged on the tool holder as a working tool. Nevertheless, considerable operating forces are necessary.

It is therefore the object of the present invention to provide an improved surface processing system.

To achieve the object, it is provided in a surface treatment system of the type mentioned in the introduction that the surface treatment system has at least one with respect to the surface fixed fixable holding device which is connected to at least one flexurally flexible pulling member with the working device.

The flexurally flexible pulling element can be, for example, a cable, a toothed belt or the like. The flexurally flexible pulling element is suitable, for example, for positioning and / or supporting the working device with respect to the surface to be machined. For example, the flexurally flexible pulling member can prevent or at least slow down a fall of the working device onto a ground.

The working tool is preferably a disk tool and / or a grinding tool. For example, a grinding belt, sanding pad or the like may be provided as a working tool. The working tool can also be a milling tool or the like other cutting tool.

The drive motor, with which the tool holder is driven or driven, is preferably provided or configured for rotationally driving the tool holder about a rotational axis and / or for eccentric rotational driving of the tool holder. It is possible that the working device can be switched over between an eccentric mode, in which the tool holder and thus the working tool pass eccentric movements, into a pure rotational mode, in which the working tool rotates only about one axis of rotation, but has no eccentricity ,

The coating tool may be, for example, a spraying device for spraying paint. However, the coating tool may, for example, also comprise a roller or the like other application body for applying paint or the like other coatings to the surface of the workpiece or the space.

Instead of or in addition to the tool holder or the coating device driven by the drive motor, the working device may also comprise a cleaning device. Consequently, the working tion, so to speak form a cleaning device. The cleaning device may comprise, for example, a brush arrangement for brushing the surface and / or one or more nozzles for dispensing a cleaning liquid or the like. It is possible that the cleaning device is for example a high-pressure cleaning device.

The holding device which can be fixed in a stationary manner relative to the surface is connected to the working device by means of one or more flexibly flexible pulling elements, which can serve, for example, for the working device not falling to the ground or being held against the wall or other surface. The pulling member can support the suction device so to speak.

The tension member can, for example, provide weight compensation for the working device. Thus, the working device can be suspended, for example, on the tension member, so to speak. For example, the tension member is spring-loaded by a spring arrangement, so that the spring arrangement completely or partially compensates for the weight force of the working device. The spring arrangement can act directly on the tension member and / or load a winding body in the sense of winding the tension member onto the winding body.

It is preferably provided that the surface processing system has a positioning device with at least one positioning drive for positioning the working device transversely to the normal direction of the surface.

Preferably, a plurality of positioning drives are provided for a plurality of degrees of freedom of movement and / or directions of movement.

The at least one positioning drive can, for example, support the operator, who otherwise manually actuates the working device. It is a basic idea that the operator, with the support of the at least one positioning drive, positions the working device transversely to the normal direction, in particular multiaxial or biaxial transverse to the normal direction. At least one positioning drive is advantageously arranged on board the working device. For example, the positioning drive comprises a drive roller driven by a drive motor for rolling on the surface of the workpiece or space to be machined. An autonomous machining of the surface, for example coating or abrasive processing of the surface, is readily possible on the basis of the at least one positioning drive. The surface treatment system works independently, so it does not need any direct specifications.

A preferred embodiment of the invention provides that one or more of the positioning drives are arranged on the holding device and actuates the pulling member. Thus, therefore, the holding device has the or a positioning drive for the at least one pulling element. This positioning drive of the holding device can be provided in addition to or instead of a positioning drive on board the working device. It is furthermore advantageous if the surface treatment system has at least two or at least three, and even more preferably at least four traction elements. It is also advantageous for the holding devices if two, at least three or even four holding devices are provided. The holding devices can be arranged, for example, in corner regions of the surface to be processed, so that the working device can be maneuvered between the holding devices. In each case a pulling member is assigned to a holding device. But it is also possible that a plurality of traction elements are held on a holding device. As a result, for example, a higher tensile force can be achieved. With a plurality of holding devices, for example three or four holding devices and corresponding pulling members, which extend between the holding device and the working device, the working device can be conveniently maneuvered on the surface of the workpiece or space to be machined.

On the working device preferably several Zugorgan-holders for holding at least one tension member are present, the Zugorgan-mounts are preferably different directions of force, with which the tension members on the Working device act, assigned. It is preferred, for example, if equal angular distances are present between the tension member holders. The tension member holders can be provided or designed for a fixed permanent or detachable connection between the tension member and working device. In the Zugorgan-holders, it is advantageous if they allow snap-in connections and / or magnetic connections and / or clamping connections and / or hook connections or the like with the respective tension member. For example, latching receivers and / or latching projections and / or magnetic holders and / or bayonet contours or the like may be provided on a respective drawbar holder which, with corresponding, complementary connecting means at the respective longitudinal end of a pulling member, into a fixed, preferably again detachable connection can be brought. Of course, it is advantageous if the pulling element holders allow mobility, for example pivotability, of a respective pulling member with respect to the working device. For example, pivot bearings may be provided on the tension member mounts. But it is also possible that, for example, eyelets or the like other a range of motion of the respective tension member with respect to the working device enabling recording contours are available.

The at least one positioning drive expediently comprises at least one tension member drive for driving the tension member. The traction mechanism drive can be arranged, for example, on board the working device, on the holding device or the like. It is possible that in each case a traction mechanism drive is present both on the holding device and on the working device. The traction mechanism drives preferably cooperate. It is possible for the at least one positioning drive to comprise or be formed by at least one working device drive arranged on board the working device. In the latter configuration, it is possible, for example, that a traction mechanism drive is supported by the working device drive. But it is also possible that the traction mechanism drive and the working device drive are assigned to different directions of movement, For example, to each other angular, in particular rectangular, directions of movement. Thus, for example, the traction mechanism drive can be provided for a forward or reverse travel of the working device along the surface to be processed, while the working device drive is provided for positioning movements transversely thereto and / or configured.

In principle, it is possible that a non-active with respect to its direction of force tension member, for example sags. It is also possible that a tension member is spring-loaded by a spring arrangement, so that it is held between one hand, the holding device and on the other hand, the working device under tension.

However, a winding device for winding up the tension member is preferably present. The winding device is preferably motor-driven or spring-loaded. The winding device can, however, in principle also be manually operable, for example, have a crank or the like other actuating handle.

It is also advantageous if a positioning drive or the positioning drive, which in each case actuates a pulling element, is arranged between the working device and the at least one winding device. If, for example, the train comprises a toothed belt or a toothed belt section, the positioning drive can influence exactly one respective longitudinal position of the pulling element.

Alternatively, it is readily possible to provide the positioning drive on the winding device or to design it as a rotary drive for a winding roll.

It is possible that in the case of a winding body, for example a winding roll, the winding device is provided by the positioning drive with a displacement sensor for detecting the respective wound-up or unwound portion of the tension member. For an exact determination of the length or direction determination of a wound or unwound strand of the tension member by measuring the revolutions of a winding body, in particular a winding roll, advantageously a determination of the respective winding status "is provided so that the influence of the respective winding diameter on the length the unwound portion of the Zugor- goose is detected in a rotation of the tension member winding bobbin. For this purpose, for example, an optical sensor, a camera or the like may be provided.

In connection with the unwinding and winding of the tension member has already been clear that it is advantageous if the tension member does not sag. It is advantageous if at least one tensioning element, for example a tensioning roller or the like, is provided for tensioning the tension member. The clamping member is suitably spring loaded. The tensioning element can be arranged, for example, between the winding device and the working device. Furthermore, it is possible for the tensioning element, for example a tensioning roller, to be arranged between a tensioning element drive and the winding device which unwinds and unwinds the tensioning element. As a result, for example, a precise winding and unwinding of the pulling member from a roller or other winding body of the winding device is possible. It is also expedient to have a pulling element guide device with a pull guide element for guiding the at least one pulling element. The train guide body may be stationary or movable on, for example, the holding device. The tension member guide body includes, for example, a guide eye, a guide roller, a guide groove or the like. The tension member guiding body is furthermore advantageously arranged on a joint, for example a ball joint, a pivot joint, a cardan joint or the like, wherein the joint supports the tension member guiding body movably. The tension member-guide body can follow the respective movements of the tension member based on the articulated mounting. For example, the joint provided on the at least one holding device. The joint may be provided in example at a longitudinal end portion of the holding device. It is also possible for the joint to be fixed in place independently of the holding device with respect to the surface to be processed, for example by means of a suction device, a screw connection, clamping or the like.

The tension member guiding body is expediently arranged between a winding device for the tension member and / or a drive for the tension member and the mobile working device. Thus, the traction element guide body guides the traction element, for example, between the winding device and the working device or the drive for the traction element and the working device.

For stationary fixing of the holding device, various methods are suitable. Thus, for example, a vacuum clamp or the like may be provided with other vacuum holding device for fixing the holding device with respect to the space to be processed. Preference is given to clamping the holding device between opposing surfaces, for example a floor and a ceiling of the room. For example, the holding device can be braced in the manner of a sprout between the floor and the ceiling or can be braced.

It is preferred if the holding device is longitudinally adjustable with respect to its longitudinal extent between at least two longitudinal positions, in which the longitudinal ends of the holding device have different distances from one another. The longitudinal ends are then based, for example, on the floor and the ceiling of the room. In the respective longitudinal positions, the holding device can be fixed, for example by means of a clamping device, a screw thread or the like of another fixing device.

The holding device has, for example, a kind of stand or support.

The holding device has, for example, a holding base and a supporting body, which can be fixed relative to one another with respect to the longitudinal extent of the holding device in at least two longitudinal positions of the supporting body relative to the holding base are. For example, the support body can be telescoped on or with respect to the support base. It is understood that a plurality of telescopically adjustable components of the holding device can be provided.

The working device expediently has a guide device with at least one guide contour, for example a guide surface, for guiding on the surface of the space or workpiece. The guide contour expediently has a flat shape. The guide contour can example, lie in a plane. The guide contour can be an elastic or compliant guide contour. But it is also possible that the guide contour is or includes a hard, non-compliant contour.

The working tool or the coating tool is expediently mounted movably with respect to the guide device. Thus, for example, the guide contour follow the surface, while the working tool or coating tool can follow unevenness of the surface to be processed. It is of course also possible for the disk tool to have a certain degree of flexibility, for example a foam layer which, as it were, adapts to the respective surface contour of the surface or follows this surface contour.

It is possible that only the working tool or the coating device, in particular the coating tool, is movably mounted with respect to the guide device. But it is also possible that the working device is mounted movably as a whole with respect to the guide means. For example, the working device can form a drive unit or a drive head, which is movably mounted with respect to the guide device. The movable mounting of the working device or its working tool or coating device with respect to the guide device makes it possible, for example, for the working device, the working tool or the coating device to be linearly and / or pivotally mounted on the guide device on the basis of a bearing device with regard to the at least one guide contour. For example, multi-axis swiveling or floating, be stored. A floating bearing is to be understood in particular as a multi-axis pivotability. The bearing device supports the working tool, the coating device or the working device as a whole preferably pivotable about at least one pivot axis, which runs transversely to a rotational axis of the working tool or to the normal direction of the surface oriented force component. A gimbal or ball joint bearing is advantageous, for example.

An advantageous bearing concept provides that the bearing device comprises at least one membrane on which the working tool, the coating device or the working device as a whole is held on the guide device. For example, the membrane is held with its edge region on the guide device, and carries the work tool, the coating device or the working device as a whole, which is arranged in the interior of the guide device.

The movable mounting of the working tool and / or coating device with respect to the guide device also makes it possible, for example, to bring it into a parking position which makes sense when the working device is stationary with respect to the surface to be processed, for example to a pre-positioning before the actual work process starts or during work breaks. Then a surface treatment, such as a coating, an abrasive machining or the like is not possible or useful. Both could lead to damage or destruction of the surface. A preferred concept therefore provides that the working tool or a coating tool of the coating device with respect to the guide device is adjustable relative to the guide contour thereof between a working position provided for contact with the surface and a rest position which is set back relative to the at least one guide contour. In the rest position, the guide contour is indeed on the surface, while the Working tool or coating tool has a distance from the surface. The rest position is suitable, for example, for a pre-positioning of the working device on the surface.

It is possible that the working tool or coating tool can be adjusted manually by an operator between the rest position and the working position. Preferably, the working device has an actuator for adjusting the working tool or coating tool between the rest position and the working position. The actuator may, for example, comprise a lever gear, which is manually operable. Preferably, however, the actuator is motor, in particular electric motor. This makes automation possible, among other things.

The working tool or coating tool is loaded with respect to the guide device in a working position provided for contact with the surface by a spring arrangement. Thus, the spring assembly comprising one or more springs, in particular coil springs, leaf springs or the like, holds the working tool or coating tool in contact with the surface to be machined. It is possible that the aforesaid actuator actuates the working tool or coating tool against the force of the spring assembly into the rest position. The guide device expediently has a guide support on which a bearing body having at least one guide contour and intended to bear against the surface to be machined, for example a sealing body, a rubber seal, a brush seal or the like, is movably supported. The guide device can thus have a so-called stiff or rigid guide carrier on which, in turn, the working tool, the coating device or the working device as a whole is mounted so as to be movable. The contact body is expediently spring-loaded with respect to the guide support in the direction of the surface to be machined by a spring arrangement. But it is also possible that the body of the system is so to speak floatingly mounted with respect to the guide carrier, so that he multi-axis can swing with respect to the management carrier. A spring load is optionally possible in this situation, but not essential.

The guide contour expediently surrounds the working device annularly. The guide contour can be an elastic guide contour, but also a solid. The guide contour can be formed by one or more bearing bodies, in particular plates body, sealing body or the like.

The guide device expediently has at least one suction area for sucking onto the surface to be processed. The intake area can be located, for example, laterally next to the working tool or coating tool. The suction region can surround the working tool or coating tool in a ring-shaped or partially annular manner.

However, it is also possible for the working device to suck in, as it were, on the surface to be machined on the basis of the working tool. An intake area of the guide device and a further intake area on the working tool or coating tool are readily possible.

The working device is preferably received in an intake housing. The suction housing is provided for suction to the surface. The suction housing can sheath or encapsulate the working device as a whole. By way of example, the already mentioned guide contour for guiding on the surface to be processed is arranged at an edge region or an end face of the suction housing. The intake housing can be designed, for example, in the manner of a bell. In the intake housing, a vacuum chamber is preferably provided, in which the working device is received.

It is preferred if the surface treatment system has a vacuum generator which is separate from the working device and which is connected to the working device by means of a suction hose. The vacuum generator is for example a vacuum cleaner. It is advantageous if a control of the surface processing system is on board the vacuum generator. The vacuum generator can be arranged, for example, stationary in a room, while the working device is mobile and positioned along the surface to be machined. The controller or control device on board the vacuum generator can, for example, actuate positioning drives on board the working device or on one or more of the holding devices. It is preferred if the working device has an intake control or a regulating device or both for adjusting a negative pressure in a suction region provided for sucking the working device against the surface. For example, the vacuum generator arranged on board the working device can be correspondingly activated or regulated. For example, a pressure sensor is provided in the intake area.

The working device may have a support tool with a support surface or processing surface for abutment with a workpiece surface, for example a wall surface. This support tool can be configured and designed the same as the plate tool described below, d. H. For example, intake air inlet openings and / or additional air inlet openings and associated outlet openings.

Machining heads, for example coating heads of the coating device, milling tools or the like, may be arranged on the support tool for machining other machining tools for machining the workpiece to be machined.

The working tool is preferably a disk tool for machining the surface and a drive motor for driving the disk tool has up, which has a processing of a workpiece associated processing surface and the processing surface opposite machine side, wherein for sucking the processing surface to the surface to be machined the intake air inlet openings are arranged, which are flow-connected to at least one intake air outflow opening arranged on the disk tool apart from the processing surface, wherein the disk tool has at least one additional air inflow opening for the inflow of intake air. set air that is fluidly connected to at least one off the processing surface arranged additional air discharge opening.

The suction device is preferably designed to generate an intake air flow and / or a negative pressure at the at least one intake air outflow opening and the at least one additional air outflow opening.

Advantageously, it is provided that the suction device has an intake control for controlling the intake air flow and / or the negative pressure in the region of the at least one additional air outflow opening.

It is a basic idea that, as it were, the intake air flow or the negative pressure or both in the region of the additional air outflow opening is adjustable, so that, for example, the at least one additional air inflow opening can be activated as a further inflow opening in the sense of an inflow opening sucking the machine tool to the surface and / / or in order to change a total suction power of the suction device between the at least one additional air inlet opening and the inlet air inlet openings, for example, a greater suction power of the suction device is present in the region of the intake air inlet openings arranged on the processing surface.

On the processing surface is preferably an abrasive for processing a workpiece or a holding means for releasably holding such

Abrasive arranged. It is possible that both are provided, namely that a holding means is present on which an abrasive is held.

The abrasive and / or the holding means expediently has through-openings corresponding to the intake air inflow openings, so that air can be drawn in through the passage openings into the intake air inflow openings from the front side or processing side of the abrasive means or the holding means , The holding means for releasably holding the abrasive expediently comprises a hook-and-loop arrangement, for example hook-and-loop hooks, a Velcro felt or the like. On the machine side of the disk tool is preferably a receiving holder, for example, a projection, a retaining pin, a Bajo net contour or the like, for attachment to a tool holder of the working device. Thus, it is advantageous if the plate tool is detachably arranged on the working device. For example, if the holding means or the abrasive wear out, the plate tool can be exchanged.

The tool holder or the plate tool is connected directly to the drive motor, for example in the form of a direct drive, or motion-coupled, for example by means of a gear and / or an eccentric bearing or the like.

The intake control is expediently designed for controlling the intake airflow and / or the negative pressure in the region of the at least one intake air outflow opening. Consequently, it is thus possible for the suppression or the intake air flow to be directly adjustable in the region of the intake air inflow openings. For this purpose, for example, a valve is provided which can set the suppression or intake air flow in the region of the intake air outflow opening.

Furthermore, however, it is also possible for the intake air flow and / or the negative pressure in the region of the at least one intake air outflow opening to be influenced by the intake control or only by controlling the intake air flow or the negative pressure in the region of the at least one additional air outflow opening is. Thus, so to speak indirectly, the intake capacity, which is basically available, is set by adjusting the negative pressure or the intake air flow in the region of the at least one additional air inflow opening. It is possible for a substantially constant or constant intake air flow or a substantially constant or constant negative pressure to be available in the region of the at least one intake air outflow opening. But it is also possible that by changing the intake air flow or the negative pressure in the region of the at least one additional air outflow opening and thus also changes the flow conditions and / or pressure conditions in the region of the intake air inflow, which preferably a priority Ansaug- or main intake of the disk tool and thus the Machine tool.

The suction device has, for example, a vacuum generator for generating a negative pressure and / or an intake air flow, which is arranged on the working device, for example, on whose housing is arranged. But it is also possible, in addition to the already mentioned vacuum generator or as a substitute for the suction device has a arranged on the working device suction port for a separate from the working device or machine tool, in particular spatially remote, vacuum generator. This vacuum generator is formed for example by a vacuum cleaner. A flexible flow line, for example a suction hose, can be connected to the suction connection. For example, the suction connection can be provided for connecting a suction hose of the vacuum cleaner or vacuum generator. The suction connection is preferably a connecting piece or a sleeve. Preferably, the intake control has at least one valve for controlling the intake air flow and / or the negative pressure in the region of the at least one intake air outflow opening and / or in the region of the at least one additional air outflow opening, wherein a valve inlet of the valve of the at least one intake air outflow opening and / or the at least one additional air outflow opening is connected and a valve outlet of the valve is connected or connectable to a vacuum generator. Thus, the pressure conditions and / or flow conditions in the region of the at least one intake air outflow opening or the at least one additional air outflow opening can be adjusted without changing the suction power of the vacuum generator on the basis of the valve. The valve is arranged, for example, in a flow channel between the at least one intake air discharge opening or the additional air discharge opening or both and the vacuum generator or the suction connection for the vacuum generator and thus connected between the respective outflow openings and the vacuum generator. The valve member of the valve member is adjustable between, for example, a blocking pitch closing the flow channel and a passage position releasing the flow channel and preferably at least one intermediate position between the blocking pitch and the passage position

The valve includes, for example, a control valve, a switching valve, or the like. The valve may be switchable between a passage position for passage and a blocking pitch for blocking a flow connection between vacuum generator and outlet openings of the disk tool. However, the valve can also switch intermediate positions between such a passage position and locking division or can not be completely closed and / or completely openable. For example, the valve may be or include a proportional valve.

It is preferably provided that the valve member with respect to a valve housing of the valve is rotatably and / or displaceably and / or pivotally mounted between the at least two valve positions. An axis of rotation or pivoting axis of the valve member can run, for example, parallel to the main flow axis of the valve, but also with a slight inclination, for example, a maximum of 10 ° or 15 °. It is also possible that the axis of rotation or pivot axis of the valve member runs transversely to the main flow axis of the valve, for example at right angles. A superimposed

Swivel-slide movement of the valve member is readily possible.

The valve member comprises, for example, a cylinder body, on whose outer peripheral wall at least one recess is arranged. Several recesses may be provided on the circumferential wall, for example in longitudinal distances and / or angular intervals. To change the flow cross section of Valve is the peripheral wall and thus the at least one recess on the peripheral wall with respect to a valve housing adjustable.

It is preferably provided that the valve has a motorized valve drive and / or a spring arrangement and / or a manually operable operating hand for adjusting the valve member. It is understood that combinations are possible, i. E. H. that, for example, a manually actuable valve member is additionally spring-loaded. A valve which is driven by itself or by a spring arrangement can also be actuated manually without further ado.

It is advantageous if the valve member is actuated or actuatable depending on an angular position of the working device to a substrate. By way of example, the valve member can be mounted so movably in a valve housing of the valve and actuated by the gravitational force that, depending on an angular position of the working apparatus, it changes the flow cross-section of the valve, for example opens or closes, reduces or increases it. The valve member may, for example, open a passage of the valve when machining a ceiling surface, partially or completely close the passage of the valve when machining a side wall of a cavity. If a floor surface is to be machined, the valve can completely close the passage. Advantageously, a fixing device, for example a latching device and / or a clamping device and / or at least one magnet, is provided for stationary fixing of the valve member in at least one valve position.

The latching device can comprise, for example, latching contours on the valve member, in particular its manual operating handle, and a component stationary relative to the valve housing of the valve. Thus, when the operator actuates the operating handle, the latching contours can engage in one another at predetermined positions. A clamping device may for example comprise a spring arrangement or a clamping disk or be formed thereby, so that, for example, the valve member is correspondingly stiff.

A magnet holder can, for example, provide a magnet on the valve member which realizes a magnetic hold with another magnetic element, for example a magnet or a ferromagnetic component, which is stationary relative to the valve housing.

It is preferred if the valve member can be locked or fixed in predetermined valve positions in which, for example, certain flow conditions or negative pressure distributions can be set between the intake air inlet openings and the additional air inlet openings. For example, a predetermined position of the valve member may be provided for wall processing by the machine tool, while another position may be provided for ceiling work or soil preparation. For ceiling processing, the valve member is, for example, in such a valve position, that the flow cross section of the valve is greater than in a wall machining.

Thus, for example, more intake air or negative pressure may be present in the area of the intake air inflow openings. Conversely, it is also possible that, conversely, the valve member releases a larger flow cross-section in the case of a cover machining, namely if additional air is not provided by the additional air inflow openings arranged on the surface in the sense of suction of the disk tool, for example on the outer circumference of the Inlet valve arranged inlet openings, to flow, so that the suction power in the area of the intake air inlet openings is correspondingly lower.

In a preferred embodiment of the invention, the valve member is spring-loaded in the direction of a closing position closing the valve and can be actuated by being suppressed in the direction of its open position. Thus, for example, a suppression in the range of at least one additional Air-outflow, the valve member in the direction of its open position against the force of the valve member in the closed position spring-loaded Federano- tion be openable. However, it is also possible that a negative pressure which protrudes on the outflow side opens the valve member, so that corresponding negative pressure can be generated in the region of, for example, the intake air outflow openings or the additional air outflow openings.

An embodiment of the invention provides that at least one bypass duct connected to the at least one exhaust air outflow opening is provided past the at least one valve. However, it is also possible for exhaust air from the at least one exhaust air outflow opening to always pass through the bypass duct or an arrangement of a plurality of bypass ducts past the valves in the direction of the vacuum generator or a suction connection for the vacuum generator, i. the valve only influences the flow conditions or pressure conditions in the region of the at least one additional air intake opening.

The additional air inlet openings may be provided at different areas of the plate tool.

One embodiment provides, for example, that the at least one additional air inflow opening comprises or is formed by an additional air inflow opening arranged on the processing area. Of course, a plurality of additional air inlet openings may be arranged on the processing surface. On the basis of the additional air inflow opening is on the processing surface, it is possible to directly influence the suction of the disk tool to the surface to be machined. It is preferred if the at least one additional air inflow opening or all additional air inflow openings are arranged on a radial outer circumference of the plate tool. The intake air inlet openings are therefore preferably arranged in a central region of the disk tool, while the additional Air inlet or inlet openings are arranged on the edge region of the Tellerwerk-.

It should be mentioned at this point that the plate tool preferably has a circular circumference or an oval circumference. In particular, the disk tool is provided for rotational actuation by the drive motor. But it is also possible that the plate tool, for example, has a triangular, rectangular or square contour. For example, the disk tool for an embodiment of the working device can be provided as a vibratory grinder or oscillating grinder or an oscillating grinding machining of the surface. However, an embodiment of the working device is preferred as a rotary grinding machine and / or as an eccentric grinding machine.

It is preferred if the at least one additional air inflow opening comprises or is formed by an additional air inflow opening arranged on an outer periphery of the disk tool, in particular on an outer edge area of the disk tool, between the machine side and the machining surface. Thus, by means of the additional air inflow opening at the outer edge region, in particular at the outer peripheral region, of the disk tool, dusts and the like, other particles can be sucked in from the surroundings of the disk tool. Dust-free or dust-free work is thereby facilitated.

It is preferred if the disk tool has an arrangement of inlet openings extending annularly about an axis of rotation or about a central axis of the plate tool which is orthogonal to the machining surface. The at least one additional air inflow opening and / or the intake air inflow openings form part of the arrangements of such inflow openings. It is understood that a plurality of, in particular concentric, ring arrangements of inflow openings, ie additional air inflow openings or intake air inflow openings, can be provided. The inflow openings of the respective arrangement of inflow openings are expediently arranged at equal angular distances from one another. An annular arrangement of inflow openings, for example, inflow openings at equal angular intervals. Furthermore, the arrangements of additional air inlet openings and intake air inlet openings are arranged concentrically with respect to the axis of rotation or center axis of the plate tool in a preferred embodiment.

The outflow openings are expediently on the machine side of the dish tool. For example, the at least one intake air outflow opening and / or the at least one additional air outflow opening are arranged there.

It is preferred if one or more additional air inflow openings are assigned to an additional air outflow opening. With regard to a respective intake air discharge opening, it is also advantageous if one or more intake air inlet openings are assigned to it.

It is furthermore preferred if a plurality of intake air outflow openings and / or a plurality of additional air outflow openings are present. In particular, these are configured or arranged in ring arrangements. For example, it is advantageous for the disk tool to have an arrangement of outflow openings extending annularly about an axis of rotation or about a central axis of the disk tool that is orthogonal to the machining surface, the at least one intake air discharge opening and / or the at least one additional air discharge opening forming one component forms such an arrangement of inflow openings.

It is also advantageous in the case of the ring arrangements of outflow openings if they have outflow openings arranged at equal angular distances from one another. Furthermore, it is also advantageous in these arrangements if the arrangement of additional air outflow openings and the arrangement of intake air outflow openings are concentric with respect to the axis of rotation or center axis of the disk tool. For example, the intake be air outlet openings radially inwardly with respect to the axis of rotation or central axis, the additional air outflow radially outward.

The suction device preferably has separate inlets for the additional air outflow opening and the intake air outflow opening or the respective arrangement thereof. For example, the intake device has an intake air inlet assigned to the at least one intake air outflow opening and an additional air inlet assigned to the at least one additional air discharge opening.

The intake air inlet or the auxiliary air inlet or both may have a ring-shaped or partially annular geometry. It is possible that one of the inlets is formed as a chamber or inlet chamber, around which the respective other inlet extends annularly or partially annularly.

The intake air inlet and the additional air inlet expediently extend annularly about an axis of rotation of the disk tool or a center axis of the disk tool. Preferably, the auxiliary air inlet and the intake air inlet are concentric with respect to the axis of rotation or central axis.

The intake air inlet and the additional air inlet may be at least partially flow-connected. For example, it is possible that, so to speak, false air flows from one inlet to the other inlet. With a sufficient intake power of the suction device or the vacuum generator, this can be acceptable.

However, it is preferred if the intake air inlet and the additional air inlet are flow-separated from one another by at least one seal, for example a ring seal. The at least one seal expediently extends annularly around the axis of rotation or center axis of the disk tool. The at least one seal is preferably in the sealing seat or sealing on the machine side of the plate tool. Preferably, concentric seals are provided so that, for example, an annular additional air inlet or intake air inlet is limited by the seals. The at least one seal may be, for example, a rubber seal or elastic seal. However, the at least one seal can also be, for example, a brush seal.

A preferred concept provides that the at least one seal with respect to a rotational axis or center axis of the disk tool comprises a radially outer seal and a radially inner seal, which are provided and / or configured to rest on the machine side of the disk tool. The two seals define an annular chamber running around the axis of rotation or central axis of the plate tool and a fluid chamber, which is surrounded by the annular chamber and is technically separated from the annular chamber by the radially inner seal. It is possible that the annular chamber, the additional inlet and the central chamber form the intake air inlet. However, it is also possible that the annular chamber form the intake air inlet and the central chamber form the additional air inlet or are assigned to this respective inlet. The machine tool is preferably a manually operated or to be taken working device. An embodiment of the invention can provide that a particular rod-shaped handle for gripping by an operator is arranged on the working device. The handle is preferably mounted pivotably or rotatably about at least one pivot axis, preferably at least two mutually angled pivot axes, on the working device. For example, a gimbal bearing or a ball bearing may be provided between the handle and the working device.

A further concept provides that the machine tool has a positioning device with at least one positioning drive for positioning the working device transversely to the normal direction of the surface. For example, an electric drive, with which the working device performs a movement along the surface, be provided on the working device. Thus, for example, a drive roller or a drive wheel can be provided on the working device. Furthermore, it is advantageous if the working device at least one with respect to the surface fixed fixable holding device which is connected to the working device on the basis of at least one flexurally flexible pulling element. The pulling member may be, for example, a rope, a toothed belt or the like. Based on the tension member, the working device is preferably positionable. But it is also possible that the tension member purely borrowed serves that the working device can not fall uncontrollably to the ground. Furthermore, the pulling member can also serve to assist the operator in the manual operation of the working device.

It is preferred if an energizing device for energizing the working device is arranged on the handle. For example, the drive motor for the working tool can be supplied with current by means of the energizing device.

The handle is conveniently telescopic. Preferably, the handle has a base tube body, which engages in an adjustment tube body or engages in an adjusting tube body. Thus, therefore, the adjustment tube body is added to the base tube body or vice versa. It is furthermore advantageous if the two tubular bodies can be clamped by means of a clamping device, in particular a clamp, in at least two mutually different longitudinal positions which the tubular bodies can have relative to one another. The clamp may for example comprise a clamping screw, a clamping lever or the like.

It is possible that the section between the energizing device and the working device has a predetermined length and / or is not telescopic bar. The telescopic portion of the handle expediently has a support body for supporting on a body of the operator. A longitudinal position of the support body with respect to the energizing device is adjustable by means of the telescoping handle. A longitudinal extension of the support body expediently runs transversely to the longitudinal extension of the handle or of the telescopic section of the handle. Expediently, the suction device has at least one valve for controlling an intake air flow and / or a negative pressure in a suction region of the working device for suction onto the surface, wherein the at least one valve has a valve member which is adjustable between at least two valve positions where a flow cross-section of the valve is different.

To achieve the object, it is provided in a mobile machine tool of the type mentioned that the suction device has an intake control for adjusting the valve member during operation of the working tool or the coating device between its valve positions in dependence of at least one physical size.

It is a basic idea here that the intake control, which can also be referred to as an adjusting device, dynamically adjusts the valve member, so to speak, while the working tool or the coating tool processes the surface, for example abraded or coated. The valve member is drivable or driven without the direct influence of the operator, namely by the intake control.

To adjust the valve member, for example, a valve drive, a spring arrangement or both can be provided. However, it is also readily possible that the valve also has a manually operable operating handle in order to actuate the valve member. The per se motorized or driven by the spring assembly valve member can therefore also be operated manually.

The manual operating handle can also serve to change a bias of the spring assembly, for example, to adjust the valve to another working area.

The at least one physical variable includes, for example, an angular position of the working device to a substrate. The intake control adjusts the valve member depending on the valve position of the working device to the background. So if, for example, the working device has a vertical working Position assumes, for example, for processing a side wall surface, the valve member has a different position than in a processing of a surface on the ground or a surface treatment of a ceiling surface.

To determine the angular position, the intake control may have a position sensor. The position sensor is designed to detect an angular position of the working device to a substrate as the at least one physical variable. The position sensor may be an acceleration sensor. The acceleration sensor can perform a three-axis acceleration measurement. But it is possible that the valve member, so to speak makes a detection of the angular position of the working device to the ground or adjusted in dependence on the angular position itself. The valve member is movably mounted, for example, in a valve housing of the valve in dependence on an angular position of the working device to a base between at least two valve positions. The valve member takes the valve positions by an adjustment of the working device in a respective angular position independently. The valve member includes, for example, a ball or other rolling body or Wälzkör- per, which is movably mounted within the valve housing. Depending on the angular position of the working device and thus of the valve, the valve member moves within the valve housing, for example, to open or close a valve passage opening. It is possible that a plurality of such valve members are provided.

The at least one physical variable may also include an engine power or a motor current of the drive motor. Consequently, the at least one physical variable can also represent an abrasion performance or polishing performance of a work tool. The intake control is designed to control the valve or to adjust the valve member as a function of the engine power or of the motor current. For example, if the engine provides more power, this can be an indicator of high abrasion performance which in turn is due to the fact that the oppression in the intake area is large.

However, the at least one physical variable may also include a pressure and / or a flow velocity of an intake air flow in the intake region. For this purpose, the intake control has, for example, a pressure sensor for detecting the pressure and / or a flow sensor for detecting the flow speed.

It is also possible for the valve member to be actuated, so to speak, automatically by the pressure or the flow, ie, for example, the valve member is spring-loaded in the direction of a closed position and can be opened by suppression or is spring-loaded in the direction of an open position and closed by negative pressure ,

It is preferred if the intake control has a regulating device for regulating a negative pressure in the intake region as a function of the at least one physical variable. The control may include, for example as an input variable, a pressure signal or flow signal of the pressure sensor or flow sensor. On the output side, the control device controls, for example, a motorized valve drive to actuate the valve member. By means of the valve, the intake control can set or regulate, for example, an intake airflow which is sucked through the intake region during operation of the machine tool. But it is also possible that with the valve, an external air control takes place, i. For example, external air flows into the intake area or another negative pressure area, which is flow-connected to the intake area, so as to change, for example increase or decrease, the negative pressure or the flow speed of the intake air flow in the intake area.

It is readily possible that the suction device at least one further manually operable valve for influencing the negative pressure and / or the Has intake air flow in the intake. The valve is thus present in addition to the actuatable by the intake valve. For example, with the valve, a forced air inlet can be opened or closed or partially opened by the operator of the machine tool. As a result, for example, a working range of the actuatable by the intake valve can be changed.

Hereinafter, embodiments of the invention will be explained with reference to the drawing. Show it:

FIG. 1 shows a perspective view of a surface treatment system which is arranged in a space having at least one surface to be processed,

FIG. 2 shows a side wall of the space according to FIG. 1 on the two holding devices and the working device of the surface processing system according to FIG. 1 in a processing situation for processing the wall surface;

3 shows a schematic view from below of the ceiling of the room according to FIG. 1 with the working device working on the ceiling, FIG.

FIG. 4 shows a schematic view of a holding device of the surface processing system according to the above figures with a positioning drive and a flexible pulling member,

FIG. 5 shows a flanging device of the surface treatment system in a first longitudinal position,

6 shows the holding device according to Figure 5 in a second longitudinal position

FIG. 7 shows a first schematic view of a winding device of the surface processing system according to the preceding figures, 8 shows a further winding device of the surface treatment system according to the above figures,

9 is a perspective oblique view of the working device of the surface processing system, which in FIG. 10 is shown from above and in FIG

Figure 11 is shown from below, Figure 12 shows a cross section through the working device approximately along a

Section line A-A in Figure 10,

FIG. 13 shows a further cross section through the working device according to FIG

10 along a section line B-B,

FIG. 14 shows a valve for controlling a negative pressure in a suction region of the working device,

15 shows a mobile machine tool with a valve of a first type for controlling an intake air flow, FIG. 16 shows a detail X1 from FIG. 15 with the valve in another valve position,

FIG. 17 shows a plan view of the machine tool according to the two preceding figures with a partial detail,

FIG. 18 shows a detailed view of the valve of the machine tool according to the three preceding figures,

19 shows a section through the machine tool according to the previous

Figure approximately along a section line S1 -S1, FIG. 20 shows a machine tool with a further valve for controlling an intake air flow, which in FIG

Figure 21 is shown in partial section and with a different suction control of the valve, Figure 22 is a section through the machine tool according to the above

Figure, approximately along a section line S2-S2,

Figure 23 is a valve member of the valve of the machine according to the above

Figure.

Figure 24 shows another machine tool with a valve for controlling the

Intake air flow in

FIG. 25 shows a partial section in a first valve position of the valve and in FIG

26 shows the same partial section, but with a different valve position of

Valve is shown

Figure 27 is a section through the machine tool of the three above

Figures, approximately along the section line of the partial section,

Figure 28 is a perspective oblique view of the machine tool according to

Figure 27 with a rod-shaped handle, of which in

Figure 29 is a telescoping section in perspective and in

Figure 30 is shown from the side, Figure 31 is a longitudinal section through the arrangement according to the above

Figure, approximately along a section line S3-S3,

FIG. 32 shows a machine tool with a further valve for controlling the exhaust air flow, which in FIG FIG. 33 in perspective from above and in partial section in a first valve position of the valve and in FIG

FIG. 34 shows a second valve position of the valve, FIG. 35 shows a machine tool with a further valve for controlling the intake air flow, which in FIG

FIG. 36 is a fragmentary sectional view of the valve assuming a first valve position;

FIG. 37 shows a section X1 from the preceding FIGURE with the valve in a different valve position, FIG. 38 shows a sectional view approximately along the partial section plane in the two preceding figures, the valve assuming a passage position and FIG

Figure 39 shows a detail X3 from the preceding figure, wherein the valve assumes a blocking division, Figure 40 is another working device with a position-dependent valve for

Control of the intake air flow, and

FIG. 41 shows a working device with a cutting working tool and a coating device.

With a surface processing system 10, surfaces of a space RA are machinable, for example, a bottom surface FB or sidewall or wall surfaces FL, FR, FF which are angled to each other. With the surface processing system, however, a ceiling surface FD of a ceiling of the room RA can also be processed. Already the processing of the lateral surfaces FL, FR and FF of the side walls is tiring for an operator, the more the processing of the ceiling surface FD. The operator must be in In this situation, a working device 50 with, for example, a control panel or the like holding another handle, which is tiring in the long run and in any case time consuming.

In the surface treatment system 10, however, the processing of the surfaces FL, FR, FF, FD is more apparent.

Namely, the working device 50 is held on flexible pulling members 30A, 30B, 30C, 30D and also sucks on the surface FL, FR, FF to be machined by means of a negative pressure generated by a vacuum generator 15, for example a vacuum cleaner 15B , FD with at least one force component in a normal direction N of the respective surface FL, FR, FF,

FD on.

The vacuum generator 15 is a separate from the working device 50 and spatially separate vacuum generator. The vacuum generator 15 is flow-connected to the working device 50 by means of a flexible suction hose 11. Alternatively or in addition to the vacuum generator 15 but also a locally on board the working device 50 arranged vacuum generator 15C would be possible.

The pulling members 30A-30D can serve only as a safety measure, that in case of a pressure drop of the vacuum provided by the vacuum generator 15, the working device 50 does not fall to the ground, ie falls in the direction of the ground surface FB, but also an autonomous or semi-autonomous operation permit, that is, that the working device 50 can be positioned with reference to the traction elements 30A, 30B, 30C and 30D with respect to the respective surface to be machined FL, FR, FF, FD. The vacuum generator 15 is, for example, a vacuum cleaner, that is to say that when it processes a respective surface FL, FR, FF, FD of the space RA it draws particles into a dirt collecting container 16. As a result, for example, a low-dust or dust-free machining of the surfaces FL, FR, FF, FD is possible. The vacuum generator 15 has a suction unit 17, while For example, a turbine with an electric drive motor. The suction unit 17, like the dirt collecting container 16, is accommodated on a housing 18. The housing 18 may be arranged fixed on the ground, for example the surface FB, but also be freely movable there, for example on the basis of rollers 19. The rollers 19 can not be driven, so that the vacuum generator 15 remains stationary, for example, space RA or can also be taken from the working device 50 when it moves along the respective surface to be machined FL, FR, FF, FD along. It is also possible for one or more of the rollers 19 to be driven, in particular driven by a control device 32, which is explained further, in order to follow the movements of the working device 50.

The traction members 30A-30D are supported by retainers 20A-20D. The holding devices 20 are arranged stationarily in the space RA, for example at the respective corner regions of the surfaces FL-FD. In the embodiment illustrated in the drawing according to FIG. 1, for example, the ceiling of the room RA is processed, ie the ceiling surface FD. Accordingly, the holding device 20A-20D in the respective inner corners, ie the space A, thus arranged at the corner regions of the surface FD, so that a large work area or working space is spanned for the working device 50, in which the working device 50 freely positionable is, namely by actuation of the traction members 30A-30D or by at least one positioning drive 340A, 340B aboard the working device 50. For actuation of the traction members 30A-30D provided positioning provided 40A, 40B, 40C, 40D and the positioning nierantriebe 340A, 340B Components of a positioning device 13. The holding devices 20 are detachable in the space RA can be arranged, for example, clamped, clamped or the like. For adaptation to the spatial conditions of the space RA, the holding devices 20 can be subdivided, ie, for example, their respective longitudinal ends 23, 24 can be braced with surfaces of the space RA lying opposite one another, for example the bottom surface FB and the Ceiling surface FD. The holding devices 20 are designed, for example, in the manner of sprouting, telescoping longitudinal supports or the like. The holding devices have a holding base 21 on which a supporting body 22 is telescopically mounted. For example, the longitudinal ends 23, 24 can be adjusted in longitudinal positions L1 and L2, where they can then be fixed by a fixing device 25 of the holding device 20. The fixing device 25 has, for example, a fixing base 26 on which a fixing body 26B, for example a clamp or the like, is adjustable between a fixing position fixing the support body 22, for example locking or clamping, and a releasing position releasing it, for example by means of an adjustment movement or locking operation LO. In the unlocked or released state of the fixing device 25, the support body 22, for example, be longitudinally adjustable, which is indicated by a double arrow or a longitudinal adjustment LV in the drawing. The fixing device 25 may be or comprise a clamping device, that is, for example, that the support body 22 with respect to the support base 21 by means of a

Screw thread or the like of other clamping means is adjustable so that it is the holding device 20, in particular the longitudinal ends 23, 24 between the opposing surfaces FD and FB is clamped.

On a respective holding device 20A, 20B, 20C, 20D, there are respectively arranged a puller guide means 27A, 27B, 27C and 27D for guiding the pulling member 30A-30D. The tension member guide device 27 has, for example, a guide body 28, in particular a guide groove and / or a guide roller, on which the tension member 30 is guided. In order for the guide body 28 to be able to follow the movements of the respective pulling member 30A-30D, it is preferably movable on a hinge 29, movably mounted about at least one pivot axis, preferably about a plurality of pivot axes. The joint 29 is preferably a ball joint, a cardan joint or the like.

The positioning drives 40A, 40B, 40C, 40D are arranged on the holding devices 20A-20D, which act on a respective pulling member 30A-30D and actuate it. For transmitting a tensile force, a pulling member 30, for example, as a Be designed rope. However, a toothed belt whose respective length between the guide body 28 and the working device 50 can be influenced or adjusted exactly is preferred.

The positioning drives 40 have drive motors 41, which form tension member drives. The drive motors 41 drive drive rollers, in particular toothed rollers,

42, which rotate about axes of rotation D1. The tension member 30 is guided over the drive pulley 42, so that a rotational actuation of the drive roller 42 by the drive motor 41 leads to a longitudinal adjustment of the tension member 30 and thus to a positioning of the working device 50. The traction mechanism drives 41 are arranged between the guide bodies 28 on the one hand and on the other hand a winding body 43 of a winding device 45. The winding device 45 winds, for example, a section or strand of the tension member 30 which is not required in each case. Preferably, the winding body 43 is spring-loaded by a spring arrangement 44, for example by a torsion spring. Of course, the angle body 33, for example a winding roll or a winding drum, be driven by a drive motor to wind the section of the tension member 30 between the tension member drive 41 and the angle 43. The winding body 43 rotates, for example, about a rotation axis D2. In order to determine the length of that section of the pulling element 30 which is adjusted by the tensioning device drive 41 in the direction of the winding device 45, ie the section with which the positioning drive 40 draws pledges on the working device 50, a speed sensor 46 is preferably provided , The speed sensor 46 may form, for example, a component of the drive motor of the tension member drive, ie, measure the revolutions of the drive motor. It is also possible that the rotational speed sensor 46 is arranged, for example, directly on the pulling member 30, for example there by optical means, on the basis of a driving role and the like, the respective longitudinal adjustment of Zugor- gans 30 measures or detected. Based on, for example, the rotational speed sensor 46 derived speed information or basically length information on the tension member 30, for example, the mentioned control device 32, the positioning drives 40A-40D control. The control device 32 may comprise or be a control device arranged on board the vacuum generator 15 and / or on board the working device 50.

It is also possible that the control device is multi-part, i. that parts of their components are arranged on board the vacuum generator and others on board the working device 50. These parts of the respective control device can communicate with each other.

However, the control device 32 can also be a control device which can be positioned separately from, for example, the vacuum generator 15 in the space RA or comprise, as indicated schematically in the drawing.

For example, the controller 32 includes a computer. The control device 32 preferably comprises input means 33, in particular a keyboard, a mouse, a touch-sensitive screen or the like, and output means 34, for example a screen, signal lights or the like, other optical output means and / or acoustic output means, for example a voice output, a loudspeaker or like. The control device 32 further comprises a processor 35 for executing program codes of programs, for example a control program 37, which is stored in a memory 36 of the control device 32. The control program 37 can be loaded from the memory 36 into the processor 35. The controller 32 communicates with the positioning drivers 40A-40D via communication links 38A-38D, such as control lines and / or wireless links, such as WLAN or the like. Wired communication links 38A-38D can be used in sections, for example to be bundled to a trunk or trunk communication link 38.

In this way, the control device 32 can control, for example, the positioning drives 40A-40D in such a way that it can control the working device 50 between several positions with respect to the respective surface FL, FR, FF, FD to be machined. For example, the tension members 30A-30D pull the work apparatus 50 along the ceiling surface FD, exemplifying positions P1 and P2 in the drawing. It is readily possible for the working device 50 to move into the corner regions relative to the respective guide bodies 28 of the flanging devices 20 and also along or to the edge regions of the ceiling surface FD. If, for example, the tension members 30D, 30C between the working device 50 and the guide bodies 28 of the flanging devices 20D, 20C are particularly long, the working device 50 can be moved between the holding devices 20A, 20B, for example, at the edge region of the surface FD to edit the surface FD.

The working device 50 is freely movable on the surfaces FL, FR, FF, FD of the space RA. For example, the suction hose 11, which connects the working device 50 with the vacuum generator 15, follow the movements of the working device 50. Also, an electrical supply line 12, which is preferably provided between the vacuum generator 15 and the working device 50, is correspondingly flexible and makes the movements of the working device 50 on the surface FL, FR, FF, FD to be machined. The supply line 12 may be guided in or on the suction hose 11, for example forming a part of the same. The supply line 12 is connected, for example, to an electrical connection 52A of the working device 50. The supply line 12 supplies the working device 50 with electrical energy. For example, an energizing device 804A may be on board the vacuum cleaner 15, which supplies the working device 50, for example an electronically commutated motor thereof, with electrical energy via the supply line 12. The vacuum generator 15 is connected via an electrical connection line 14, which has a plug in example, with a power supply network, for example, an AC voltage network connected. The power supply network is available, for example, in the room RA by means of a socket into which the connection line 14 or its plug can be plugged.

For positioning the working device 50 with respect to a side wall, for example the wall surface FL, it is advantageous if in each of the corner regions, for example in the upper and lower corner regions, the surface FL is in each case provided with a tension member via a stationary pulling element. Guide device acts on the working device 50. Now, a configuration would be possible in which, for example, the holding devices 20C, 20D are arranged reversely in the space RA with respect to their horizontal position, so that their respective guide bodies 28 in the region of the bottom or the bottom surface FB close to the wall to be processed Surface FL are arranged. For example, in each case one of the holding devices 20C, 20D can be arranged next to the holding devices 20A and 20B, the positioning drives 40 of which can then pull on the working device 50, so to speak from below, by means of a pulling member 30.

However, an advantageous concept is given if a second positioning drive, for example a positioning drive 40U, is arranged on a respective holding device 20, for example the holding devices 20A, 20B, as it were. The positioning drive 40U acts on the working device 50 via a pulling member 130A, 130B when it is active on a side wall surface FL, FR, FF. For example, the positioning drives 40U also comprise the same or similar components as the positioning drives 40, so that, for example, a traction element drive 41 U acts on the traction element 130 via a drive roller 42U which, as it were, downstream or downstream of the traction drive 41 U Winding body 43U can be wound up. The winding body 43U forms part of a winding device 45U and is, for example, spring-loaded by means of a spring arrangement 44U in the sense of winding up the pulling member 130 or by an attachment (not shown in the drawing). driven by a drive motor. The respective length of the tension member 130 unwound or adjusted by the tension member drive 41 U can be detected by means of a speed sensor 46U.

The positioning drives have, for example, communication interfaces 47, 47U, in particular network interfaces (LAN, WLAN or the like)

Communication with the controller 32 via the communication links 38 on. The communication interfaces 47 may also be, for example, Bluetooth interfaces or include. An interface 39 of the control device 32 is designed for communication with the communication interface 47, ie it includes, for example, a LAN, WLAN, Bluetooth interface or the like.

The positioning drives 40, 40U are held or arranged, for example, on a carrier 48 or a housing 48, which is fixed in place on the holding base 21 of a respective holding device 20. Instead of a positioning drive 40, 40U, a positioning drive 140 can also be used. The positioning drive 140 includes a drive motor 141, which serves to drive a drive roller 142. The drive roller 142 is disposed between an angle body 143, a winding device 145 and a guide body 28. A respective length of the section of the pulling member 30 actuated by the drive motor 141 can be detected, for example, by a rotational speed sensor 146, an encoder, which is arranged between the drive roller 142 and the guide device 27.

It is advantageous if a section of the tension member 30 between the drive roller 142 and the winding device 145 is tensioned, for example by means of a tensioning device 149. The tensioning device 149 comprises a tensioning element 148, for example a tensioning roller, over which the tension member 30 runs. Thus, the portion of the pulling member 30 extending between the drive roller 142 and the winding body 143 of the winding device 145 is kept tensioned. As a result, among other things, the winding on the winding member, the winding body 143 is optimized. Also, the winding body 143 may be driven by a spring arrangement. In the present case, a winding drive 144, for example an electric motor, is provided. Based on the course of the tension member 30 between the clamping member 147 and the winding body 143 of the winding drive 144 can be controlled, in particular regulated, to keep, for example, the tension member 30 in this area under tension.

To guide the tension member 30 on the winding body 143, a guide device is preferably provided. The example of a bobbin 243 and a guide device 248 this is illustrated in the drawing. A positioning drive 240 provides that its winding device 245 simultaneously forms the positioning drive or the traction drive for the tension member 30. The tension member 30 extends from a drive pulley 242 past a speed sensor 246 to the guide body 248A of the tension member guide device 248. The speed sensor 246 measures the length of the tension member 30 unwound or wound onto the winding means 245 and thus the length

Travel of the working device 50 upon actuation of the pulling member 30 by the positioning drive 240th

The winding device 245 has a winding drive 244, which also represents the traction mechanism drive 241. The tensioning element drive 241 or winding drive 244 comprises, for example, an electric motor which can be actuated by the control device 32 via a communication section 247.

The guide device 248 includes, for example, a carriage or train guide body 248A guided on a guide 248B. The guide 248B is, for example, a linear guide that runs parallel to a rotation axis D2 about which the winding body 243 rotates. Thus, the tension member guide body 248A oscillates back and forth along the linear guide 248B, so that the tension member 30 is optimally wound up and unwound on the coil 243A. It is possible that the control device 32 also controls the guide device 248 for the tension member 30. It is also possible for the wiper device 245 to have a local control for the guide device 248 or for this guide device 248 to function automatically so to speak, ie to automatically take part in the movement of the traction element 30 and to ensure that one on the winding body 243 wound coil 243A of the tension member 30 is wound exactly.

It is also possible to position the working device 50 with reference to a positioning drive located on board the working device 50 with respect to the workpiece surface or space surface FL, FR, FF, FD to be machined. For example, on the working device 50, positioning drives 340A,

340B may be provided, the drive motors, for example work device actuators 341A, 341 B have. The working device drives 341 A, 341 B, for example, drive wheels or drive rollers 342, which can roll along the surface FL, FR, FF, FD to be machined. The working device drives 341 A, 341 B are assigned to different directions of movement or axes of movement, for example to each other in an angle, in particular at right angles. Thus, for example, the control device 32 can also control the positioning drives 340A, 340B for positioning the working device 50 with respect to the surface FL, FR, FF, FD to be processed.

The working device 50 comprises a machine tool 51. The machine tool 51 can also be understood as a working device 50. The working device 50 or machine tool 51 comprises a drive unit 52 with a drive motor 53. A stator 54 of the drive motor 53 is arranged stationarily with respect to a carrier 60 of the drive unit 52. A rotor 55 of the drive motor 53 rotates about a motor rotation axis DM.

The drive motor 53 drives a tool holder 58, on which a work tool 90A, for example a disk tool 90, can be arranged or arranged. An output 56 of the rotor 55, on which, for example, a gear is arranged, drives an eccentric 57, in particular a drive 57B, for example a toothed wheel, of the eccentric 57. The eccentric 57 has the tool holder 58 for the plate tool 90. The tool holder 58 is arranged on a pivot bearing 59 of the eccentric 57, so that the tool holder 58 can rotate about a tool axis of rotation DW. The tool rotation axis DW and the motor rotation axis MD have an eccentricity EX to each other. Thus, therefore, carries the plate tool 90 eccentrically to the motor axis of rotation DM and in a hypercycloidal movement about the tool axis of rotation DW. Thus, a smooth running of the plate tool 90 can be achieved, which facilitates manual operation of the working device 50, but also the operation based on the positioning 40th

The carrier 60 has a cover wall 61, which covers the plate tool 90 at least on the upper side, preferably also on its outer circumference 93.

In front of the top wall 61 is a motor mount 62, in which the drive motor 53 is received. On its side facing away from the plate tool 90 side, the drive motor 53 has a fan 63, with which a cooling air flow, which passes through the drive motor 53, can be generated.

The cooling air flow KL can flow out via a suction connection 71 of a suction device 70 of the working device 50. For example, the suction hose 11 is connected to the suction connection 71.

The plate tool 90 has a processing surface 91 for processing one of the surfaces FL, FR, FF, FD of the space RA, whereby of course also another surface, for example a Flolz workpiece or a metal workpiece with the processing surface 91 can be machined. On the processing surface 91, abrasives, polishing agents or the like can be arranged directly. In the present case, an adhesive layer 98 is provided on which an abrasive agent 99 is detachably held, for example an abrasive sheet. The adhesive layer includes, for example, Velcro, Velcro hooks etc. The working surface 91 is in the present case a plane surface, but may also have, for example, a trough or the like of a different contour.

The disk tool 90 has a machine side 92, the machine side 92 and the machining surface 91 facing away from each other or being arranged on opposite sides of the disk tool 90.

The machine side 92 is provided on a plate tool carrier 100 and the top wall 61 of the carrier 60 faces. An elastic layer 101, for example a so-called sanding pad or backing pad, is arranged on the disk tool carrier 100, which is essentially rigid, for example made of a suitably loadable plastic material. The processing surface 91 is arranged on the side of the layer 101 facing away from the dish tool carrier 100.

On the processing surface 91, intake air inflow ports 94 are provided, which are fluidly connected to intake air discharge ports 95 on the engine side 92. For example, flow channels penetrate the layer 100 and the die carrier 101. Through the intake air inflow ports 94, intake air AL can flow into the intake air inflow ports 94. The intake air AL is shown in the drawing with hatched arrows.

The intake air AL serves to suck the plate tool 90 and thus also the working device 50 to the workpiece surface to be machined.

The intake air inflow ports 94 are provided annularly on the processing surface 91. For example, a plurality of, in particular at least two, presently four, concentric ring arrangements 94 A, 94 B, 94 C, 94 D are provided by intake air inflow openings 94. The intake air inflow openings 94 extend in an annular manner about the central axis of the disk tool 90, which in the present case corresponds to the tool rotational axis DW. The intake air outflow openings 95 are likewise arranged in a ring around the tool rotation axis DW. It is possible that a plurality of, in particular concentric, ring arrangements of intake air outflow openings 95 are provided. In the drawing, a single ring arrangement of intake air discharge openings 95 is shown regularly.

Additional air inlet openings 96 are also provided on the plate tool 90, through which additional air ZL can flow into the plate tool 90. The additional air ZL is shown symbolically in the drawing with white arrows. The additional air inflow openings 96 are fluidly connected to additional air outflow openings 97 on the machine side 92 of the plate tool 90, for example on the basis of flow channels not specified, which pass through the adhesive layer 98, the elastic layer 101 and the disk tool carrier 100.

In principle, it is possible that the additional air ZL also ensures suction of the plate tool 90 to the surface to be machined FL, FR, FF, FD. For example, additional air inflow openings 196 are provided on a plate tool 190 for this purpose.

In contrast, in the case of the disk tool 90, the additional air inflow openings 96 are arranged on its outer circumference 93. The additional air inflow openings 96 are therefore oriented radially outward with respect to the central axis, in the present case the tool axis of rotation DW, of the disk tool 90. Thus, the additional air ZL from the surroundings of the disk tool 90 can convey particles, dust or the like in the direction of the disk tool 90 and flow out through the additional air outflow openings 97.

The suction device 70 has an intake air inlet 72, which is assigned to the intake air outflow openings 95 and is flow-connected to these. Furthermore, the suction device 70 comprises an additional air inlet 73, which is fluidly connected to the additional air discharge openings 97.

The intake air inlet 72 is bounded by a seal 74, for example a ring seal, which rests against the machine side 92 of the disk tool 90. The seal 74, like a seal 75, is designed as an annular seal, with the seal 75 lying radially outward with respect to the seal 74. Thus, an annular chamber is defined between the seals 74, 75, which defines the additional air inlet 73. The radially outer seal 75 seals the additional air inlet 73 from atmospheric pressure.

The intake air inlet 72 is, so to speak, a central intake chamber, which lies in the interior of the seal 74. Via a bypass channel 76, the intake air inlet 72 communicates directly with the suction port 71 and thus the vacuum generator 15. The additional air inlet 73 communicates with the suction port 71 via a valve 85, the valve member 86 between at least two, preferably a plurality of valve positions, adjustable is.

The valve 85 forms part of an intake control 80 or can be controlled by it. The valve member 86 is adjustable within a valve housing 87 of the valve 85, for example, pivotable about a pivot axis SW1. On the basis of the valve member 86, a valve passage 88 on the valve housing 87 can be opened or closed, whereby intermediate positions are also possible. On the input side, the valve 85 communicates with the additional air inlet openings 96, namely with the additional air inlet 73. The valve passage 88 and thus the outlet of the valve 85 is flow-connected to the suction port 71. Thus, depending on the valve position of the valve member 86, more or less intake air is drawn from the auxiliary air discharge ports 97 and transported away via the suction port 71.

The valve member 86 has a cylinder jacket-like peripheral wall 86A which is movable on the inner circumference of a likewise cylindrical peripheral wall 87A of the valve housing 87. The peripheral walls 86A, 87A are substantially sealingly abutting each other. Between a front side of the peripheral wall 86A and the top wall 61 of the carrier 60, which forms a part of the valve housing 87 so far, a seal 88A is arranged. The gasket 88A simultaneously acts as one Clamping device 88 B for clamping the valve member 86 in a respective valve position.

The peripheral wall 86A protrudes in front of a top wall or bottom wall 86B of the valve member 86. The peripheral wall 87A of the valve housing 87 extends between the top wall 86B and the top wall 61 of the carrier. Thus, therefore, the valve member 87 is sandwiched between the cover walls 61, 86B added.

For storage of the valve member 86 with respect to the valve housing 87 a Drehla- ger 86C is provided. From the top wall 61, for example, there is a bearing projection 86D, which engages in a bearing receptacle 86E of the valve member 86. To secure the valve member 86 to the bearing projection 86D, a fastening element 86G, for example a screw, is used. The fastener 86G preferably creates a bias of the valve member 86 toward the seal 88A. The fastening element 86G extends, for example, parallel to the pivot axis SW1. On the side facing away from the interior of the valve 85, the valve member 86 has an actuating handle 86F which serves for gripping by an operator.

The actuating handle is at the same time designed as an indexing element, which is adjustable, for example, in the direction of markings 89A-89D, which indicate the respective valve position of the valve 85. For example, one or more of the markings 89A-89D may have detent projections 89E with which the valve member 86, in particular the actuation handle 86F, can be latched, for example, with a detent nose or detent projection 89F at its free end region. For example, the latching protrusions 89E may be provided in pairs in at least one of the marks 89A-89D, respectively, so that the operation handle 86F is interposed between the

Latching projections 89E can engage.

The markings 89A, 89D correspond to, for example, a passage position and a blocking pitch of the valve 85. The marks 89B, 89C indicate Mixing ratio of intake air flowing via the auxiliary air inflow ports 96 and intake air flowing intake air intake ports 94, which is optimally suited for, for example, a sidewall processing (mark 89B) or a ceiling work (mark 89C). In a Deckenbear- processing, for example, the ceiling surface FD, as little additional air is sucked, so that the suction or suction force in the normal direction N, which is generated by the intake air via the intake air inlet openings 94, as large as possible.

A working device 50A and its plate tool 90 essentially correspond to the working device 50, wherein instead of the valve 85 a valve 185 is provided. The valve 185 forms e.g. a component of a Ansaugsteue- tion 180 or is controlled by this. The valve 185 serves to control the negative pressure in the region of the additional air outflow openings 97, but pivots about a pivot axis SW2, which flows transversely to the flow direction of the intake air flow, which flows through the suction port 71. Preferably, a valve member 186 of the valve 185 is disposed below the suction port 71. The valve member 186 includes, for example, a part-cylindrical peripheral wall 186A extending between end walls 186B, 186C. The end walls 186B, 186C are, so to speak, the bottom and top sides of the imaginary cylinder of the valve member 186. On the end walls 186A, 186B, for example bearing projections 186D are arranged, which engage in corresponding receptacles of the valve housing 187 and enable the pivotal mounting of the valve member 186 about the pivot axis SW2 ,

An actuating handle 186F is provided in front of the end wall 186B, for example an operating lever or operating projection, on which the operator can adjust the valve member 186 so that a valve passage 188 provided on the peripheral wall 186, ie an interruption of the peripheral wall 186 over a predetermined angle segment, can be brought into a passage position at the outlet of the additional air inlet 73, so for example an opening between the seals 74, 75, is open. However, if the peripheral wall 186A closes this opening 189. In a schematically illustrated working device 50B, a valve 285 is provided instead of the valve 85 or 185. The valve 285 has a valve member 286, which is manually operable by means of an actuating handle 286f. The actuating handle 286F is arranged on the valve member 286 of the valve 285. The valve member 286 has a plate-shaped wall body 286A.

The wall body 286 has a partial ring shape, so that it can also close a teilringför shaped opening on the top wall 61, which defines a valve passage 288 of the valve 285, or open.

The valve passage 288 extends within a valve housing 287 of the valve 285. The valve housing 287 has side walls 287A which protrude from the top wall 61 and are closed by a top wall 287B. On the top wall 287B, the suction port 71 is arranged. Furthermore, the valve housing 287 communicates with the intake air discharge openings 95, which are arranged in the interior of a circumferential wall 287 C of the valve housing 287. In the interior bounded by the circumferential wall 287C, which defines the intake air inlet 72, as it were, the drive motor 53 is arranged, for example (schematically illustrated).

The actuating handle 286F can, for example, engage in a guide recess 289, which is for example a type of extension of the valve passage 288, with a clamping section or latching section, not visible in the drawing, around the valve member 286 with respect to the valve housing 287, in this case the cover wall 61 one or more valve positions to lock, jam or the like. The clamping portion or locking portion may intervene in example in the guide recess 289 and be in a Flintergriff with the same.

The guide recess 289 and the valve passage 288 extend annularly about a pivot axis SW3 about which the valve member 286 can pivot. The valve member 286 is thereby adjusted about the pivot axis SW3 in a kind of sliding movement along the valve passage 288. The pivot axis SW3 and the motor rotation axis DM are preferably coaxial. A valve 385 of a working device 50C substantially corresponds to the valve 285. Similar components are therefore provided with reference numerals which are 100 greater than the valve 286. If identical components are present, they are provided with the same reference numerals. A valve member 386 of the valve 385 closes a valve passage 388 which, like the valve passage 388, extends arcuately or annularly about the pivot axis SW3. However, an operation handle 386F for manually operating the valve member 386 is not guided on the valve passage 388 but on a guide 385G separate therefrom. The guide 386G, like the valve ports 288, 388, extends annularly about the pivot axis SW3. By means of the separate guide 386G, any desired clamping devices, latching devices or the like for clamping or latching the actuating handle 386B and thus the valve member 386 in predetermined valve positions can be realized. The valve 385 preferably comprises a valve drive 82, for example a drive motor 382, which is in driving engagement with, for example, the top wall 61 or another component stationary relative to the carrier 60. For example, the drive motor 382 may have a pinion at its output, which engages in a toothing fixed to the carrier 60. For a manual actuation of the valve 385, for example, the pinion can be disengaged from the toothing or the drive motor 382 can run with little resistance. Thus, a decoupling of a valve drive for a manual actuation of a valve within the scope of the invention is therefore possible.

A working device 50D is similar in construction to the working device 50B, 50C and has a valve 485 instead of the valves 285, 385. The valve 485 has a valve housing 487, which is similar to the valve housing 287 constructed and accordingly has the same reference numerals in the drawing. A valve passage 488 of the valve 485 communicates with the auxiliary air inlet 73 and is closable by a valve member 486. The valve member 486 has a wall-like or plate-like shape, for example a plate body 486A, which is about a pivot axis SW4

is pivotable between a passage position DS, in which the valve passage 488 is flow-connected to the suction port, and a closed position SS, in which the valve passage 488 is closed.

By pressing on the suction port 71 suppressing the valve member 486 is acted upon in the direction of its passage position DS with force and can be acted upon by an actuator with an actuator 486 B in its closed position SS. Instead of or in addition to the actuating element 468B, a spring 468K can also be readily provided, which acts on the valve member 486 in its closed position SS. The valve 485 operates in this case pressure controlled, d. H. that when the negative pressure at the suction port 71 is greater than the spring force of the spring 468K, the valve 485 opens, so that the negative pressure in the intake region or on the processing surface 91 of the disk tool 90 falls, because so to speak, external air via the additional air inflow orifices 96 can flow.

The actuating element 486B is pivotally mounted on the valve housing 487, for example on one of the side walls 487. The actuating element 486B comprises, for example, a pivot lever whose free end region can act on the valve member 486 in order to adjust it to the closed position SS. The actuator 486 thus has, for example, a lever-like shape or a Flebel.

Connected to the actuating element 486B is an actuating handle 486F, for example a pivot lever, which is arranged on an outer side of the valve housing 487, for example also on one of the side walls 487A or

487b. The actuating handle 486B includes, for example, an actuator lever that can be gripped by the operator. Actuating handle 486F may be actuated by detent 486H in various detent positions, the valve positions of valve 485, for example, at DS or SS positions, correspond, are latched, for example in the passage position and / or the blocking division and preferably one or more intermediate valve positions. The latching device 486H has latching projections 4861, for example, with which the actuating lever 486G can be latched. The latching protrusions 4861 project in front of one of the side walls 487A.

A so to speak automatic, in any case position-dependent operating valve 585 of the working device 50E has a valve member 586 in the form of a rolling body, in particular a ball or the like. The valve member 586 is received in a valve housing 587 of the valve 585 freely movable. The valve housing 587 has, for example, a peripheral wall or sidewalls 587A which, as it were, narrow or are oriented toward an outlet 587B of the valve housing 587. Thus, the valve housing 587 is narrower in the area of the outlet 587B than in the area of one or more valve passages 588 which are provided on a wall 588A which, as it were, closes the additional air inlet 73. Consequently, therefore, air flowing via the additional air inlet 73 can flow via one or more of the valve passages 588 to the outlet 587B, which in turn is flow-connected to the suction port 71.

When the working device 50 assumes an overhead position, for example during the processing of the ceiling surface FD, the valve member 386 passes from the valve passage 588 into a position closing the outlet 587B, which in the drawing is connected to a continuous line of the valve member 586 - indicates. Thus, air flowing through the additional air inflow openings 96, which so to speak represents false air, can no longer reach the suction connection 71, whereby the intake force in the area of the intake air inflow openings 94 is increased. However, if the working device 50 assumes an, for example, vertical orientation, ie, the working surface 91 is vertical, the valve member 586 may pass away from the outlet 587B, for example, sliding or rolling along a slope of the sidewalls 587A so that the outlet 587B becomes free and supply air or secondary air can thus flow in via the additional air inlet openings 96. It is further indicated in the drawing that the valve member 586 can also reach a position closing the at least one valve passage 588 (shown in dashed lines).

In the embodiment of the plate tool 190, it is also indicated that an additional air inflow opening 196 can also be arranged on the processing surface 91, so that the valve 585 is used, for example, directly to influence the air flow flowing over the processing surface 91 or the negative pressure prevailing there can be.

In addition to the so-called automatically functioning concepts of the vacuum influence by manually operable valves or position-dependent valve (585), servomotor or controlled concepts are also easily possible:

For example, the intake control 80 includes a control device 81. The control device 81 may, for example, the motorized valve drive 82, in particular a servomotor, drive. The valve drive 82 can, for example, directly drive one of the valve members 86, 186, 286, 386 or 486.

The valve drive 82 may also include, for example, a magnetic drive 582, such as an electrical coil, for actuating the valve member 586 in one or more valve positions.

Based on sensor signals of one or more sensors of a sensor arrangement 83, the intake control 80 can actuate the valve drive 82, for example by means of a position sensor 83A whose output signal indicates an angular position of the working device 50 to a background, for example the surface FD. In turn, a motor sensor 83B, for example, is a current sensor or comprises a current sensor whose output signal or sensor signal indicates, for example, a power of the drive motor 53. Depending on a suction of the working device 50 against the surface to be machined, the friction of the working surface 91 on the surface to be machined changes. surface, wherein then the drive power of the drive motor 53 and thus its motor current changes, which can be detected by the motor sensor 83B.

The control device 81 can then, for example, control the motorized valve drive 82 with increased engine power in the sense of reducing the negative pressure in the intake region and decreasing engine power in the sense of increasing the negative pressure.

However, an immediate pressure measurement or flow measurement is also possible, namely with reference to the pressure sensor 83C and / or the flow sensor 83D. For example, the pressure sensor 83C is arranged in the vacuum region or suction region and measures directly the negative pressure with which the plate tool 90 and thus the working device 50 are sucked to the surface to be processed.

For example, a force sensor 83F, 83G, e.g. a strain gauge or the like, which presses the pressing force with which the abutment body 65 B and / or the plate tool 90 presses against the surface to be machined. The force sensor 83G can be provided, for example, on the drive train, for example on a bearing, of the working device 50. If the contact force of the abutment body 65B becomes too great, for example, the intake control 80, in particular the control device 81, can actuate the valve drive 82 in terms of reducing the negative pressure, or if the pressure force is too low, it can increase the pressure force ,

The working devices 50, 50A, 50B, 50C, 50D, 50E, 50F may be adapted for manual operation, i. H. be provided by an operator operation. But it is also possible that they are used in connection with the positioning device 13 for a kind of robot operation.

For example, the working device 50 is subsequently described in an installed position in a housing 64, which can be actuated by the positioning device 13. Also, the carriers 60 of the other working device 50A, 50B, 50C, 50D, 50E, 50F may be operable by the pulling members 30 and preferably also housed in the housing 64.

It can be seen that the working device 50 can be used autonomously or manually. However, it is also possible for the pulling members 30 to attack them directly, for example. In the present case, however, the working device 50 is configured such that the carrier 60, including all the components held thereon, namely the drive gear 52 and the disk tool 90 / working tool 90A, are accommodated in a housing 64. The housing 64 forms an intake housing 64A, whose inner space 64E forms a vacuum space, so to speak. The housing 64 has a peripheral wall 64B which is covered by a top wall 64C. The top wall 64C has a dome or hood 64D in which a flow channel or flow chamber for the cooling air KL flowing out of the drive motor 53 and its fan 63 forms. The cooling air KL can be sucked off via a suction connection 64F, to which, for example, the suction hose 1 can be connected directly. The suction connection 64F communicates fluidically with the suction connection 71 of the drive unit 52 arranged so to speak in the interior 64E, so that air flowing out of the suction connection 71, which constitutes an exhaust air connection as it were, can be sucked out via the suction connection 64F. On the housing 64 Zugorgan-holders 67 are provided, in which the traction elements 30A-30D are releasably fixed, for example, lockable connectable by means of a pawl arrangement connectable to a magnetic holder or the like. Thus, although the tension members 30 can be easily released from the brackets 67 by an operator or easily fastened thereto, they then have a firm hold, so that the tensile forces of the positioning device 13 or of the positioning drives 40 are transmitted to the working device 50 can be.

The brackets 67 are provided at equal angular intervals, for example of 90 °, on the housing 64, so that the tensile forces of the traction members 30 can be optimally transmitted to the housing 64. The housing 64 also carries a guide device 65, which serves to guide on the respective surface to be machined FL, FR, FF or FD. The guide device 65 comprises a guide support 65A, which is fastened to the housing 64 or forms an integral part of the housing 64. The guide support 65A supports at least one abutment body 65B, for example, an annular abutment body 65B, or an array of a plurality of abutment bodies arranged in a ring shape, which extend around the work implement 90A. The guide supports 65A have guide contours 65C, for example guide surfaces, which preferably lie in the same plane as the working surface 91 when the machine tool 51 abuts one of the surfaces FL-FD, as schematically illustrated in the drawing. The contact body 65B preferably comprises a seal, in particular a sealing ring, which delimits a suction region 65G of the housing 64. Within the intake area 65G, the telescopic tool 90 or working tool 90A is arranged. It can be seen that not only the disk tool 90 but also the entire housing 64 is thus sucked onto the surface of the workpiece or the space to be machined. However, the guide of the working device 50 is primarily via the contact body 65B with respect to the surface to be machined.

The abutment body 65B is movably supported relative to the guide bracket 65A and spring-loaded by springs 65D toward an abutment position where the guide contours 65C abut against the surface to be machined. The springs 65D and the abutment body 65B are accommodated in a spring chamber 65E, where they are movable in the normal direction with respect to the machining surface 91 or in the normal direction relative to the guide contour or guide surface 65C, preferably also transversely to this direction , Namely, the abutment body 65B is preferably not linearly displaceably mounted on the guide carrier 65A parallel to the motor rotational axis DM or the tool rotational axis DW, but also transversely to it about at least one pivot axis. Thus, therefore, the body 65B is floating in the spring chamber or bearing support 65E. Although the disk tool 90 is flexible with respect to the surface to be machined, for example because of the elastic layer 101. An optimal adaptation to the contour of the surface to be machined is further improved by the drive unit 52 being movable with respect to the guide device 65 by means of a bearing device 66 is stored.

The bearing device 66 comprises, for example, a diaphragm 66A which is fixedly fixed with respect to the housing 64, namely, for example, sandwiched between holding portions 66B, 66C provided on the one hand by the housing 64, namely its peripheral wall 64B, on the other hand by a valve carrier 64H. The valve carrier 64H extends in an annular manner around the working tool 90A and is sandwiched, as it were, between the guide device 65, in particular the guide carrier 65A, and the peripheral wall 64B.

The diaphragm 66A thus enables a floating, multiaxial pivoting movement of the drive assembly 52 with respect to the housing 64 or the guide device 65, so that the working tool 90A can easily follow a surface contour of the surface to be machined. In addition, the work tool 90A is linearly adjustable with respect to the guide device 65, namely parallel to the tool rotation axis DW.

Instead of the diaphragm 66A, it is also possible, for example, to provide pivot bearings, in particular cardan pivot bearings, and / or sliding bearings.

Preferably, the drive unit 52 and thus the working tool 90 A in a contact position in which it is in contact with the workpiece surface to be machined, spring-loaded, for which example, a spring assembly 69 is provided. The spring arrangement 69 comprises an arrangement of one or more springs 69A, which are supported on the one hand on the housing 64 or the carrier 60, on the other hand on the membrane 66A, namely on the basis of spring holders 69B, 69C. The spring holders 69C are disposed on the diaphragm 66A, the spring holders 69B stationary with respect to the guide means 65, namely fixed with respect to the housing 64. Since the housing 64 is fixed relative to the guide device 65, the spring holders 69 B support the springs 69 A, the bearing device 66 and thus the drive unit 52 held thereon with respect to the guide device 65. The bearing device 66 further allows the working tool 90A from the working position shown in the drawing, in which the working tool 90A is in contact with the surface to be machined, to a rest position displaced therefrom. For this purpose actuators 68, such as servomotors o- the like, are provided. The actuators 68 have drive elements 68A, for example levers, rollers or the like, with which they act on transmission elements 68B, for example tension members, pull cables, rod-like elements or the like. The transmission elements 68B are connected to the drive gears 68A and the drive unit 52, namely the diaphragm 66A, which in turn are connected to the drive unit 52. Thus, the transfer members 68B pull the diaphragm 66A away from the guide contour 65C, so to speak, to move the work tool 90A to the rest position. The rest position is for example advantageous if the working tool 90A is not needed, especially in a pre-positioning before eigentli surface treatment. As a result, the plate tool 90 can cause no damage, as it were, but is kept inactive or kept in rest until the actual surface treatment begins.

Preferably, the actuator or actuators 68 engage at least two mutually opposite or a plurality of equal angular distances to each other aufwei- send points on the diaphragm 66A or the drive unit 52 at. In this case, it is possible for valves 85-585 to set a basic suction force with which the plate tool 90 sucks against a surface to be machined. However, it is also possible that valves 85-585 are completely opened. In both scenarios, the suction force control or negative pressure influencing explained below can be advantageously used: Additional air that flows through the additional air inlet openings 96, namely, not only on the machine side 92 of the disk tool 90 can be influenced, but also from the outside, so to speak.

On the housing 64, in particular the valve carrier 64H, the working device 50 namely valves 685 are arranged. The valves 685 have valve passages

688, which are arranged for example on a wall 687 of the valve carrier 64B. The wall 687 extends annularly adjacent to the peripheral wall 64B of the suction housing 64A and forms a kind of step. It is preferably provided that a plurality of spaced-apart, in particular angularly spaced, valve passages 688 are provided on the wall 687. The valve passages 688 have an annular shape, for example, and thus follow the outer peripheral contour of the circumferential wall 64B. The valve ports 688 are fluidly connected to an annulus 689 that extends around the work tool 90A. The annular space 689 is further open to the additional air inflow openings 96 at the radially outer periphery of the working tool 90A, so that air flowing in via the valve passages 688 can reach the additional air inflow openings 96 and thus reduce, as it were, the intake force in the area of the intake air inflow openings 94 , False air is sucked through, so to speak, via the suction connection 71 or 64F, namely through the valve passages 688 and the additional air inlet openings 96.

The valves 685 have valve members 686. The valve members 686 are plate-like and have a base layer 686A, to which a sealing layer 686B is arranged. The sealing layer 686B faces the wall 687 and is suitable for sealing the respective valve passage 688. The valve member 686 is movably supported on bearing projections 686C, 686D protruding in front of the wall 687. For example, the bearing protrusions 686C, 686D are bolts, screws or the like, along which the valve member 686 can slide and / or pivot. In a closed position SS, the valve member 686 closes the valve passage 688, while it is released in a passage position DS of the valve member 686.

For example, a linear adjustment of the valve member 686 with respect to the longitudinal axes of the bearing projections 686C, 686D is possible. In the present case, however, a pivoting movement of the valve member 686 on one of the bearing projections 686C, 686D is desired. The pivotal movement is triggered or made possible, for example, by springs 686F, 686G, which are arranged on the bearing projections 686C, 686D and supported on support projections 686H thereof and on the valve member 686, are differently strongly or differently biased. For example, the spring 686F has a smaller spring force than the spring 686G because it is less biased.

The springs 686F, 686G load the valve member 686 in the closed position SS. By suppressing in the suction region 64G, the valve member 686 is adjustable in its let-through position DS. Namely, when the atmospheric pressure is greater than the negative pressure in the suction region 64G by a predetermined amount, it acts on the valve member 686 in the sense of opening the valve 685. Thus, a so-called automatic negative pressure control by a spring arrangement is realized. In addition, however, the operator can also allow external air or additional air to flow into the intake area 64B via valves 685M. The valves 685M include valve ports 688B disposed on the radially outer circumference of the valve carrier 64H. The valve passages 688 are flow-connected to the intake region 64G and can be closed by at least one valve member 686M. The valve member 686M is, for example, an annular body, in particular with a Plat tengestalt which is pivotable about an axis of rotation parallel to the engine MD axis of rotation. Disposed on the valve member 686M are a plurality of actuation handles 686H, for example actuation protrusions, such that the operator actuates one of the actuation handles 686H to move the valve member 686M between a passage position exposing the valve passages 688B and one closing position and preferably one or more intermediate valve positions can adjust.

The working devices 50, 50A, 50B, 50C, 50D, 50E, 50F can be adjusted by the positioning device 13 with respect to the surfaces to be machined. However, it is also possible to operate with one movement, which becomes even clearer in the following.

A rod-shaped handle 800 is preferably pivotally multi-axially hinged to the working device 50, 50A, 50B, 50C, 50D, 50E, 50F. For example, a pivot joint 801 is provided, which supports the handle 800 with respect to a pivot axis SQ pivotally extending transversely to a longitudinal axis LL of the handle 800. Another pivotability about a further pivot axis, which runs, for example, transversely to the pivot axis SQ, is realized by a swivel joint 801, which is indicated only schematically in the drawing. The pivot joints 801, 802 together form a gimbal swivel joint. From the pivot joint 801, a solid rod portion 803 of the handle 800 extends along the longitudinal axis LL. Am remote from the working device 50

Longitudinal end of the rod portion 803 is a lighting device 804 for energizing, for example, the drive motor 53 is provided. At this point it should be mentioned that the drive motor 53 is preferably an electronically or electrically commutated drive motor.

The energizing device 804 is arranged between the rod section 803 and a telescopic section 805 of the handle 800. The telescoping section 805 includes a base tube body 806 fixedly connected to the prime mover 803. On the base tube body 806 an adjusting tube body 807 is slidably mounted with respect to the longitudinal axis LL. For example, the adjusting tube body 807 engages in an inner space of the base tube body 806.

At the free end portion of the adjustment tube body is a support body 808, which preferably extends transversely to the longitudinal axis LL. The support body 808 is suitable, for example, as a support for supporting on a body of the operator, for example, as a kind of shoulder rest or the like. As a result, the handle 800 is extremely ergonomic.

The adjustment tube body 807 is adjustable relative to the base tube body 806 along a displacement path bounded by longitudinal stops 809, 810 disposed on the base tube body 806 and displacement tube body 807, respectively.

In a respective longitudinal position of the adjusting tube body 807 to the base tube body 806, it can be fixed by means of a fixing device 811. The fixing device 811 comprises, for example, a holder which is fastened to the base tube body 806 in the manner of a sleeve or clamp, for example by means of radially projecting holding projections 815, which are screwed together, braced or the like, for example. The holder 812 has a clamp 813 which, by means of an actuating handle 814, for example a clamping screw, a clamping lever or the like, between a position which clamps or fixes the adjusting tube body 807 with respect to the base tube body 806 and a position releasing it relative to the base tube body 806 thus adjustable release position is adjustable.

The working device 50F is to be understood as an example in that a coating device or a working device suitable for machining a workpiece surface, for example a surface, can also be actuated and positioned by means of the positioning device 13.

The working device 50F has a coating device 980 with coating heads 981 A, 981 B as coating tools 981. The coating heads 981 A, 981 B are designed for coating a surface to be processed or coated, ie they can, for example, apply a coating fluid, in particular a colored liquid, color particles, to the surface. The coating fluid is taken up in storage containers 983A, 983B of the working device 50F and / or is delivered to the working device 50F via flexible lines from a stationary device, for example a storage device. container on the vacuum cleaner 15 B, supplied. For example, in the reservoirs 983A, 983B, paint, or the like, other coating fluid may be incorporated, which may flow via lines 982A, 982B to the coating heads 981A, 981B to coat, eg, stain, and / or coat the surface to be processed to be provided with a protective layer or the like.

Furthermore, the coating device 980 can also comprise, for example, an erasing device 985, in particular an erasing head, with which at least parts of the coating applied using the coating heads 981 A, 981 B can be erased again.

The extinguishing device 985 or the extinguishing head and the coating tools 981 or coating heads 981 A, 981 B are connected via communication lines 984, for example, to the control device 32 or connectable. Of course, instead of a communication line 984, a wireless connection, for example a radio connection, to and from the control device 32 may also be provided. For example, via the communication lines 984, the controller 932 may drive the application of paint or the like of other coating by the coating tools 981 or coating heads 981A, 981B, or may cause erasure by the eraser 985 including, for example, a radiator, a grinding head, or the like or drive.

The coating device 980 is arranged on a particular plate-like support body 990. The support body 990 has, for example, a base body 998, on which a processing surface 991, for example a support surface for support on the surface to be processed, is provided. The processing surface 991 is provided, for example, on a sliding body or a sliding layer 999, which is arranged on the front side of the main body 998. The coating heads 981 A, 981 B and the erase head 985 are arranged, for example, on cavities of the base body 998 which protrude behind the processing surface 991.

For example, the already explained additional air inflow orifices 96, the intake air inflow orifices 94 and the like can be arranged on the main body 998 and communicate, for example, with the already explained additional air inlet 73 and the intake inlet 72. An intake control is possible with example on the basis of the valve 585, so that the processing surfaces 991 can be sucked as the already explained processing surfaces 91 in an optimal manner to the surface to be processed.

All the aforementioned embodiments in connection with the working devices 50-50E are therefore also possible with the working device 50F with respect to the suction control or vacuum control on the working surface 991, which is or is a supporting surface. Furthermore, the working device 50F may comprise or form a machine tool 951. This can be provided as an alternative or in addition to the coating device 980.

The machine tool 951 comprises a drive motor 953 which drives a tool holder 958 via a tool shaft 956. A working tool 90F, for example a milling head, can be arranged or arranged on the tool holder 958.

The processing surface 991 forms e.g. a guide contour 965C of a 965 guide device.

The milling head or the other working tool 90F can protrude permanently in front of the machining surface 991 or guide contour 965C or, advantageously, by means of an actuator 994 between a position projecting further ahead of the machining surface 991 or guide contour 965C (shown in dashed lines) and one less far in front of the machining surface 951 or Guide contour 965C standing, in particular even behind the working surface 991 retracted, working position or Tiefeneinstellposition be adjustable. Thus, the working tool 90F can penetrate more or less far into the workpiece to be machined. In particular, during positioning by the positioning device 13, in which the working tool 90F is not working or inactive the surface to be machined, it is possible that the working tool 90F is recessed behind the guide contour 965C so that it is not in contact with the workpiece ,

The actuator 954 and the drive motor 953 are connected or connectable via communication links 955, for example communication lines or wireless connections, to the control device 32, which activates the drive motor 953 and the actuator 954 in accordance with the workpiece surface to be machined.

In the same way, it is in principle also possible that, for example, stratification tool 981 and / or the quenching device 985 can be adjusted to a position further behind the guide contour 965C or backward, in particular behind this, displaced position, for example by actuators 986 the coating tools 981 and / or the quenching device 985 are arranged. The actuators 986 can be driven by the control device 32 in a wireless or wired manner, not shown.

Further embodiments are indicated in connection with FIG.

For example, cutting tools and / or a coating device relative to the guide device 65, in particular to the guide contour 65C, can also be kept floating and / or movable on the housing 64, as it were, e.g. based on the storage device 66.

Thus, for example, instead of the plate working tool 90, a milling head or the like other cutting working tool can be driven by the drive motor 53. For example, directly on the drive motor 53 may be provided instead of the connection to the eccentric 57, a tool holder 58F, to which the working tool 90F, for example, a milling head, drill or the like, is directly attachable. To adjust the working tool 90F relative to the carrier 60, the actuator 954 already explained and shown schematically in the drawing can be provided.

Alternatively or additionally, at least one coating tool 981 can also be arranged on the carrier 60. The coating tool 981, for example one of the coating heads 981 A and / or 981 B, can be arranged stationarily on the carrier 60 or movable by means of an actuator 986 between a further ahead of the guide contour 65C projecting or a further relative to the guide contour 65C zurückverstellten, in particular behind the guide contour 65C recessed, position adjustable.

Claims

claims

1. A surface treatment system for coating and / or abrasive machining of a surface of a workpiece or a room (RA) with a working device (50) which is mobile with respect to the surface (FL, FR, FF, FD) and which is driven by a drive motor (53). driven or drivable tool holder (58) for a working tool (90A, 90F) for machining the surface (FL, FR, FF, FD) and / or a coating device (980) for coating the surface (FL, FR, FF, FD ), wherein the working device (50) comprises a suction device (70) for sucking the working device (50) against the surface (FL, FR, FF, FD) with at least one in a normal direction (N) of the surface (FL, FR , FF, FD) -oriented force component, characterized in that the surface treatment system has at least one with respect to the surface (FL, FR, FF, FD) fixed fixable Flalteeinrichtung (20) based on at least one bending flexible Zugorgans (30) is connected to the working device (50).

2. Surface treatment system according to claim 1, characterized in that it has a positioning device (13) with at least one positioning drive (40, 340) for positioning the working device (50) transversely to the normal direction (N) of the surface (FL, FR, FF Having, FD).

3. Surface treatment system according to claim 2, characterized in that the at least one flattening device (20) or the positioning drive

(40, 340) for the at least one pulling member (30).

4. Surface treatment system according to claim 2 or 3, characterized in that the at least one positioning drive (40, 340) at least one traction element drive (41) for driving the tension member and / or at least one on the work device (50) arranged working device drive comprises or is formed thereby.

5. Surface treatment system according to one of the preceding claims, characterized in that it comprises at least two or at least three or at least four traction elements (30) and / or at least two or at least three or at least four holding devices (20), wherein the working device (50 ) is held on the traction elements (30) or holding devices (20).

6. Surface treatment system according to one of the preceding claims, characterized in that on the working device (50) to each other in at least equal or approximately equal angular distances arranged Zugor- gan-holders for holding at least one tension member (30).

7. Surface treatment system according to one of the preceding claims, characterized in that it comprises at least one motor-driven and / or spring-loaded winding means (45) for winding the tension member (30).

8. Surface treatment system according to one of the preceding claims, characterized in that a positioning drive (40, 340) between the working device (50) and the at least one winding device (45) is arranged.

9. Surface treatment system according to one of the preceding claims, characterized in that it comprises at least one in particular spring-loaded clamping member, in particular a tensioning roller for tensioning the tension member (30).

10. Surface treatment system according to any one of the preceding claims, characterized in that it comprises a traction element guide device (27) with a traction element guide body (28), in particular a guide roller, for guiding the at least one traction element (30).

11. A surface treatment system according to claim 10, characterized in that the tension member guiding body (28) is fixed to or fixed to a hinge (29) fixed to a, in particular to the at least one retaining device (20) and / or the surface to be machined. , in particular a ball joint or universal joint, is movably mounted.

12. Surface treatment system according to claim 10 or 11, character- ized in that the tension member guide body (28) between the mobile working device (50) and a winding device (45) for the tension member (30) and / or a drive for the Tension member (30) is arranged.

13. Surface treatment system according to one of the preceding claims, characterized in that the holding device (20) has a clamping device for bracing the holding device (20) between opposing surfaces, in particular a floor and a ceiling of the room (RA). , having.

14. Surface treatment system according to one of the preceding claims, characterized in that the holding device (20) is longitudinally adjustable with respect to its longitudinal extension between at least two longitudinal positions, in which longitudinal ends of the holding device (20) have different distances zuei- each other and / or that the holding device (20) has a holding base (21) and a supporting body (22) which can be fixed relative to one another with respect to the longitudinal extent of the holding device (20) in at least two longitudinal positions of the supporting body (22) relative to the holding base (21).

15. Surface treatment system according to one of the preceding claims, characterized in that the working tool (90A, 90F) comprises or is formed by at least one disk tool (90) and / or grinding tool and / or a coating tool (981).

16. Surface treatment system according to one of the preceding claims, characterized in that the drive motor (53) for rotational driving the tool holder (58) is provided or designed around an axis of rotation and / or for eccentric rotary driving of the tool holder (58).

17. Surface treatment system according to one of the preceding claims, characterized in that the working device (50) has a guide device (65, 965) with at least one guide contour (65C, 965C), in particular a guide surface, for guiding on the surface (FL, FR, FF, FD).

18. Surface treatment system according to claim 17, characterized in that the working tool (90A, 90F) or the coating device (980) and / or that the working device (50) as a whole is movably mounted relative to the guide device (65).

19. Surface treatment system according to claim 17 or 18, character- ized in that the working device (50) or the working tool (90A, 90F) or the coating device (980) on the guide means (65) based on a bearing device (66) with respect to the at least one Guide contour (65C) linear and / or pivotable, in particular multi-axially pivotable, and / or is floating.

20. Surface treatment system according to claim 19, characterized in that the bearing device (66) comprises the working device (50) or the working tool (90A, 90F) or the coating device (980) about at least one pivot axis transverse to a rotation axis of the Working tool (90A, 90F) or the pivotally oriented to the in the normal direction (N) of the surface (FL, FR, FF, FD) oriented force component.

21. Surface treatment system according to claim 19 or 20, character- ized in that the bearing device (66) comprises at least one membrane (66A) on which the working tool (90A, 90F) or the coating device (980) or the working device (50 ) is held on the guide device (65).

22. Surface treatment system according to claim 17, characterized in that the working tool (90A, 90F) or a coating tool (981) of the coating device (980) with respect to the guide device (65) relative to the guide contour (65C) between a is adjustable for contact with the surface (FL, FR, FF, FD) provided working position and with respect to the at least one guide contour (65C) zurückverstellten rest position in which the guide contour (65C) on the surface (FL, FR, FF, FD) is applied and the working tool (90A, 90F) or coating tool (981) has a distance from the surface.

23. Surface treatment system according to claim 22, characterized marked, that the working device (50) has a motor or manual Stellan- drive for adjusting the working tool (90A, 90F) or coating tool (981) between the rest position and the working position.

24. Surface treatment system according to one of claims 17 to 23, characterized in that the working tool (90A, 90F) or coating tool (981) with respect to the guide device (65) in a contact with surface (FL, FR, FF, FD) intended working position is loaded by a spring arrangement.

25. Surface treatment system according to one of claims 17 to 24, characterized in that the guide device (65) has a guide support (65A) on which a the at least one guide contour (65C) aufwei- sender and to rest against the surface to be machined (FL FR, FF, FD), in particular a sealing body, is movably mounted.

26. Surface treatment system according to claim 25, characterized marked, that the contact body (65B) with respect to the guide carrier in the direction of the surface to be machined (FL, FR, FF, FD) is spring-loaded by a spring arrangement.

27. Surface treatment system according to one of claims 17 to 26, characterized in that the guide device (65) has at least one suction area for sucking to the surface (FL, FR, FF, FD).

28. Surface treatment system according to one of the preceding claims, characterized in that the working device (50) is accommodated in a suction housing (64A).

29. Surface treatment system according to one of the preceding claims, characterized in that the suction device (70) has a vacuum generator (15) arranged on the working device (50) for generating a negative pressure and / or an intake air flow and / or a suction port (71 ) for a vacuum generator (15) separate from the working device (50), in particular a vacuum cleaner (15B).

30. Surface treatment system according to one of the preceding claims, characterized in that it comprises a vacuum generator (15) separate from the working device (50) and connected to the working device (50) by means of a suction hose (11).

31. Surface treatment system according to one of the preceding claims, characterized in that the working device (50) has an intake control (80) and / or regulating device for setting a particularly substantially constant negative pressure in a suction device for sucking the working device (50). Having provided on the surface suction.

32. A surface treatment system according to claim 31, characterized in that the suction control (80) comprises at least one valve (85) for adjusting a negative pressure and / or an intake air flow in the intake region or is formed thereby.

33. Surface treatment system according to one of the preceding claims, characterized in that it has a control device (32) for Control of the working device (50) and / or at least one positioning (40) and / or a vacuum generator (15).