EP2196284A2 - Handheld cleaning/grinding machine - Google Patents

Abstract

The hand held cleaning or grinding machine (10) has a holding device (12) for holding a cleaning or grinding machine. A channel is arranged between a driving motor and a fan device for the driving motor or a transmission device. The channel is formed in a handle (68) for holding the cleaning or grinding machine.

Description

The invention relates to a hand-held cleaning / grinding machine, comprising a holding device for holding the cleaning / grinding machine, a drive motor, which is arranged on the holding device, and a tool head, which is pivotable about at least one pivot axis relative to the holding device.

From the EP 1 719 581 A1 a hand-held grinding machine is known, comprising a holding device for holding the grinding machine, a drive motor, which is arranged on the holding device, a tool head which is pivotable about at least one pivot axis relative to the holding device and having a driven via the drive motor tool drive shaft, and a transmission device for Torque transmission from the drive motor to the tool drive shaft. The transmission device has a rigid shaft, which is coupled to the tool drive shaft via a transmission or a hinge device.

From the EP 1 719 581 A1 Furthermore, a tool holding device for a hand-held grinding machine is known, which comprises a fixing device for releasably fixing the tool holding device to a tool head and a shaft for driving a held by the tool holder tool, which is coupled to a tool drive shaft of the tool head. The tool holding device may have a gear and in particular a reduction gear, via which the shaft is coupled to the tool drive shaft or can be coupled.

From the EP 1 961 518 A1 a hand-held cleaning / grinding machine is known in which at least one coupling for connecting at least one first liquid line is arranged on a holding device. Of the at least one coupling leads at least one second liquid line to a tool head.

From the US 5,788,561 a floor grinding machine is known which is usable by a standing operator.

From the US 2,365,232 is a portable powered cutting tool known.

From the DE 203 09 337 U1 a handle for rotating surface processing tools is known, consisting of a handle and a releasably and interchangeably connected to the handle or connectable tool carrier wherein the handle of a handle housing and rotatably disposed therein, connectable with a rotary drive shaft and the tool carrier of a shaft sleeve and a rotatably disposed therein, connectable to the respective tool output shaft, and wherein the shaft sleeve on retaining means on the handle housing can be fastened, while the output shaft with the drive shaft via a plug connection is torque-connected. The holding means are designed as a quick-clamping device, in particular in the manner of a bayonet connection.

The invention has for its object to provide a hand-held cleaning / grinding machine of the type mentioned, which allows fatigue-free operation for a user.

This object is achieved in the above-mentioned hand-held cleaning / grinding machine according to the invention that between the drive motor and a fan device for the drive motor and / or a transmission device, a channel is arranged, which is formed in a handle for holding the cleaning / grinding machine.

The hand-held cleaning / grinding machine can be designed in conjunction with a suitable tool as a pure cleaning machine, as a pure grinding machine or as a combination machine, which can be used both as a cleaning machine and as a grinding machine.

The drive motor is in principle the heaviest part of the hand-held cleaning / grinding machine. By placing the handle "upstream" of the drive motor, the heaviest part of the machine can lie between the hands of the operator or the machine can be held at or near its center of gravity.

By the fan device, an air flow can be generated, which flows through the channel and can flow around the drive motor to its cooling. As a result, the handle with the channel formed therein is also used for cooling the drive motor.

In addition, can be implemented with a suitable storage of the drive motor and the transmission device and in particular floating storage a low vibration transmission and noise transmission to a housing; The drive motor and the transmission device can be stored separately and thus can be damped separately for the drive motor and the transmission device vibration.

In particular, a finger penetration area is below the grab handle. This allows an operator to hold the cleaning / grinding machine securely on the handle.

In particular, the fan device and / or the transmission device are arranged closer to the tool head than the drive motor. This results in a simple serial structure of the drive components of the hand-held cleaning / grinding machine.

The drive motor in particular drives a shaft device, which is coupled to the tool head and drives a tool. It can be interposed one or more gearboxes. The shaft device comprises, for example, a flexible shaft.

It is favorable if the drive motor and the fan device and / or the transmission device are arranged in a housing device. This results in a simple structure and the drive components can be effectively protected from environmental influences. It is basically possible that the drive motor and the fan device and / or transmission device are arranged in separate housings, wherein a fluid-effective connection is given through the channel, or are arranged in a common housing.

In particular, the housing device is associated with a through opening below the handle. This provides a finger penetration area. This allows an operator to hold the cleaning / grinding machine on the handle, in which case the hand are oriented transversely to an extension direction of the holding device.

It is advantageous if the housing device has a first housing region in which the drive motor is arranged, and has a spaced second housing region in which the fan device and / or the transmission device are arranged, wherein the first housing region and the second housing region are connected by the handle are. This results in a simple and compact design.

In an advantageous embodiment, the housing device has a lower shell and an upper shell seated on the lower shell. This results in a simple and compact design. The number of components can be minimized.

It is favorable if the housing device is arranged on a first tubular element. For example, a suction channel for grinding dust and the like can be realized via the first tubular element.

It is favorable if a finger penetration area lies between the first tube element and the handle. This results in a compact design.

It is particularly advantageous if in the first tubular element, a rod element is slidably guided lockable. This results in a kind of telescopic guide and the length of the holding device can be adapted by a user to the particular application. This results in a variable usability of the hand-held cleaning / grinding machine.

It is particularly advantageous if a handle is arranged on the first tube element or on a rod element on or in the region of an end facing away from the tool head. At this handle, a user can hold the cleaning / grinding machine. With one hand he can grasp the handle and with the other hand he can hold the cleaning / grinding machine by the handle. The drive motor lies between the hands, so that a fatigue-free work is realized.

It is particularly advantageous if the handle is at least approximately in line with the handle. As a result, the hand-held cleaning / grinding machine can be used fatigue-free.

In particular, a suction channel is formed in the first tube element, which is fluidly connected to the tool head. Through the first tubular element, grinding dust and the like can then be sucked from a tool-working region on a workpiece.

Advantageously, at or in the vicinity of an end facing away from the tool head of the first tubular element or a guided in the first tubular element rod member is a connection for a vacuum cleaner arranged. This results in an effective extraction of grinding dust and the like.

It is advantageous if a shaft is guided by the handle, which is coupled torque-effectively to the drive motor. The fan device can be driven by the shaft (directly or indirectly) or a torque-effective coupling of the transmission device to the drive motor is produced. About the shaft, the drive motor and the transmission device can also decouple vibration, so that with appropriate storage of the drive motor and the housing means the vibration transmission and noise transmission is minimized to a housing device.

It is favorable if the shaft drives the fan device. It can be provided a direct drive or via a transmission device.

In the latter case, the shaft is coupled to the transmission device, which via a corresponding discharge element drives the fan device and in particular a fan wheel, by which in turn the drive motor is acted upon by a cooling air flow.

In particular, the transmission device and the fan device are arranged in the same housing area. This results in a compact design.

Advantageously, the fan device is coupled to the transmission device and driven by this.

It is advantageous if a shaft device is guided from the transmission device to the tool head. The transmission device is designed in particular as a reduction gear. This allows a high speed of the drive motor to be set to a suitable tool speed. The transmission device usually has a relatively high weight. By the arrangement close to the handle makes it possible to achieve fatigue-free working when the handle is held.

It is advantageous if a shaft device for driving a tool is guided at least partially in a second tubular element which is arranged on a housing device for the fan device and / or the transmission device. By the second tube element, the wave device is protected from the outside. The second tubular element is preferably part of the holding device and also serves, for example, for holding the tool head. The term "second pipe element" does not necessarily mean that a "first pipe element" also exists. The "second pipe element" may also be the only or "first" pipe element.

In one embodiment, the second tubular element is spaced parallel to a first tubular element. At least a portion of the shaft means is guided in the second tubular element. In the first tubular element, a suction channel is formed. Due to the parallel spaced arrangement results in a simple compact design with stable design of the holding device.

It is advantageous if the second tubular element is at least approximately in line with the handle. As a result, a user can easily hold the cleaning / grinding machine on an outer contour of the second tubular element. This results in a variety of grip options for an operator.

It is advantageous if the second tubular element is formed with a linear extent. As a result, a long-necked machine can be realized in a simple manner.

It is particularly advantageous if an arcuate element is arranged on the second tubular element, on which the tool head is mounted in a direction transversely to the extension direction of the second tubular element at a distance from the second tubular element. The arch element is a holding element for the tool head. By forming a curved element with the spaced arrangement ensures that the holding device does not interfere with the workpiece machining.

In particular, the curved element has an area which is arranged parallel to the second tubular element, wherein a bearing device for the tool head is seated in this area. This makes it easy to pivot the tool head about at least one axis.

In a preferred embodiment, the arch element forms a 180 ° arc. As a result, the tool head can be held on the holding device in a simple manner and positioned in an optimum position for workpiece machining.

Advantageously, a bearing device for the tool head is arranged at a greater transverse distance from the second pipe element than to the first pipe element. The tool head is also arranged in the transverse distance to the first tubular element. This results in a simple and compact design. Furthermore, basically a free rotation of a tool holder can be realized.

In particular, a suction channel crosses the arch element. As a result, for example, a free rotatability of a tool holding device can be realized, wherein the suction channel can be guided at a distance from the drive motor.

Furthermore, it is favorable if the shaft device is guided by the second tube element through a third tube element to the tool head. In the third tubular element, the wave device is arranged protected. Furthermore, a partial region of a suction channel can be provided via the third tubular element.

In particular, the third tubular element forms a 90 ° bend. The third pipe element does not necessarily have to be rigid, but can be made by means of a flexible hose.

It is particularly advantageous if a suction channel is formed in the third tubular element, which is fluidly connected to a suction chamber of a first tubular element. As a result, an extraction on a tool-working area can be achieved in an effective manner.

In particular, the suction channel in the third tube element surrounds the shaft device. This makes it possible, for example, to connect the suction channel in the same area and in particular a central region of the tool head to this. In turn, this ensures that when a tool holding device can be rotated on a tool head, it can not abut on a suction hose or the like.

For the same reason, it is favorable if a suction channel, which comprises a suction chamber formed in the third pipe element, has a region which lies between a suction chamber in the third pipe element and a suction chamber in the first pipe element. This area establishes the connection. About him grinding dust and the like can up to one end of the cleaning / grinding machine, which faces away from the tool head, dissipate and in particular aspirate.

Advantageously, the area is a 180 ° bend. It advantageously intersects an arch element which is arranged in a second tubular element.

It can be provided that a housing is arranged on the holding device, through which a shaft device is performed and on which a first tubular element and a second tubular element sit, which are connected to a housing device for the drive motor, and on which a third tubular element is seated, which is connected to the tool head.

This results in a compact and stable structure with advantageous application properties.

In particular, a connection for a suction duct on the tool head surrounds a shaft device. The connection advantageously opens to the tool head in a central region of the tool head.

Advantageously, an axis of the suction channel at the connection to the tool head is at least approximately coaxial with a rotation axis of the shaft device in the region of the coupling to the tool head. This makes it possible, for example, to use a freely rotatable tool holder. Such a freely rotatable tool holding device can be advantageous for the machining of corners, since the corner accessibility is increased.

In particular, a tool holding device can be releasably fixed in the tool head, which holds a tool. It is in this context on the EP 1 719 581 A1 directed.

Conveniently, the drive motor is an electric motor. As a result, the hand-held cleaning / grinding machine can be formed, for example, with little weight.

It is particularly advantageous if the drive motor is mounted floating in a housing device. As a result, the vibration transmission and noise transmission to the housing device is minimized.

For the same reason, it is advantageous if the transmission device is mounted floating in the housing device. In particular, the drive motor and the housing device are mounted separately floating, so that there is a vibration decoupling between the drive motor and the housing device.

The floating bearing is achieved for example by a plurality of elastic elements such as rubber buffers. About this there is a support of the drive motor and / or the transmission device to the housing device.

Furthermore, it is favorable if a shaft is arranged between the drive device and the transmission device. At least one partial vibration decoupling between the drive motor and the housing device is possible via the shaft since these are spaced apart from one another.

Preferably, the shaft is positioned in the housing means. As a result, it is arranged protected.

The vibration decoupling between the drive motor and the transmission device is minimized when the shaft is a flexible shaft or comprises a flexible shaft element. As a result, a rigid coupling is avoided.

For the same reason, it may be favorable if the shaft comprises at least two shaft elements, which are connected via at least one elastic coupling. This also avoids a rigid coupling. The corresponding non-rigid coupling provides for at least partial vibration decoupling between the drive motor and the transmission device.

The hand-held cleaning / grinding machine is designed for example as a long-necked machine.

Preferably, a distance between the drive motor and the tool head in an extension direction of the holding device is at least 0.3 m and preferably at least 0.5 m. As a result, for example, a wall and ceiling machining is possible and also a convenient tillage without an operator has to stoop.

The following description of preferred embodiments is used in conjunction with the drawings for further explanation of the invention.

Figur 1

eine Seitenansicht eines Ausführungsbeispiels einer erfindungsgemäßen handgehaltenen Werkzeugmaschine in Form einer Reinigungs-/Schleifmaschine;

Figur 2

eine Draufsicht auf die handgehaltene Werkzeugmaschine gemäß Figur 1;

Figur 3

eine Schnittansicht längs der Linie 3-3 gemäß Figur 2;

Figur 4

die gleiche Ansicht wie Figur 1 mit einer fixierten Werkzeughalteeinrichtung;

Figur 5

eine Schnittansicht längs der Linie 5-5 gemäß Figur 4;

Figur 6

eine schematische Darstellung der Anordnung eines Antriebsmotors und einer Getriebeeinrichtung bei einem Ausführungsbeispiel einer erfindungsgemäßen handgehaltenen Werkzeugmaschine;

Figur 7

eine vergrößerte Darstellung eines Antriebsmotorbereichs der handgehaltenen Werkzeugmaschine gemäß Figur 1 mit einer ersten Ausführungsform einer Welle;

Figur 8

die gleiche Ansicht wie Figur 7 mit einer zweiten Ausführungsform einer Welle; und

Figur 9

die gleiche Ansicht wie Figur 7 mit einer dritten Ausführungsform einer Welle.

Show it:

FIG. 1

a side view of an embodiment of a hand-held machine tool according to the invention in the form of a cleaning / grinding machine;

FIG. 2

a plan view of the hand-held machine tool according to FIG. 1 ;

FIG. 3

a sectional view taken along line 3-3 according to FIG. 2 ;

FIG. 4

the same view as FIG. 1 with a fixed tool holding device;

FIG. 5

a sectional view taken along the line 5-5 according to FIG. 4 ;

FIG. 6

a schematic representation of the arrangement of a drive motor and a transmission device in an embodiment of a hand-held power tool according to the invention;

FIG. 7

an enlarged view of a drive motor portion of the hand-held machine tool according to FIG. 1 with a first embodiment of a shaft;

FIG. 8

the same view as FIG. 7 with a second embodiment of a shaft; and

FIG. 9

the same view as FIG. 7 with a third embodiment of a shaft.

An embodiment of a hand-held machine tool is a cleaning / grinding machine. The term "cleaning / grinding machine" means that the machine with appropriate tool is designed purely as a cleaning machine, or purely designed as a grinding machine, or is a combination machine, which is operable with a cleaning tool or with a grinding tool.

An embodiment of a cleaning / grinding machine according to the invention is a long-neck machine, which in the FIGS. 1 to 5 and 7 to 9 is shown and designated 10 there. This cleaning / grinding machine comprises a holding device, which is designated as a whole by 12. On the holding device 12, a tool head 14 is pivotally supported. On the tool head 14, a tool holding device 16 (FIG. FIGS. 4 and 5 ) fixed or releasably fixable. The tool holder 16 in turn holds a tool such as a grinding wheel or a brush tool.

The cleaning / grinding machine 10 comprises a first tubular element 18, which is straight and extends linearly in an extension direction 20. The extension direction 20 is an extension direction of the holding device 12. The first tube element 18 is a hollow tube with an interior 22. A rod element 24 is guided in the interior space 22. The rod member 24 itself is again formed as a hollow tube with an interior 26.

At or in the region of one end of the rod element 24, which faces away from the tool head 14, a connection 28 for a vacuum cleaner is arranged.

The rod element 24 is displaceably guided in the inner space 22 in a direction parallel to the extension direction 20 (indicated by the double arrow 30 in FIG FIG. 1 ). In the area of the end of the rod element 24, in which the terminal 28 is arranged, sits on the rod member 24, a handle 32. This is designed as a transverse handle, which sits on a retaining element 34. The holding element 34 is arranged parallel to the rod element 24 above the rod element 24 and the handle 32 extends on both sides away from the holding element 34 to the outside, so that the handle 32 has a width B (FIG. FIG. 2 ) in the transverse direction to the extending direction 20, which is larger than the width of the first tubular member 18 and the rod member 24 in this transverse direction.

The rod element 24 is detachably fixable with the first tubular element 18. For this purpose, a corresponding fixing device 36 is provided. The fixing device 36 is for example a clamping device.

Due to the telescopic displaceability of the rod element 24 in the first tube element 18, whereby displacement positions can be determined steplessly via the fixing device 36, the length of the cleaning / grinding machine 10 is between a first end 38, which lies on the handle 32, and a second end 40, which is located on the tool head 14, adjustable. The cleaning / grinding machine 10 can be easily adapted by a user to a specific application.

The handle 32 is formed so that a user can grasp it with his hand, wherein at least approximately the hand are oriented parallel to the extension direction 20.

By means of the interior 26 of the rod element 24 and the part of the interior 22 of the first tube element 18 adjoining in the direction of the tool head 14, a suction channel 42 is formed which, as will be explained in more detail below, leads to the tool head 14 and is in fluid-effective connection therewith ,

At the first tube member 18, a housing device 44 is arranged. The housing device 44 comprises a lower shell 46, on which the first Tube member 18 is fixed, and an upper shell 48, which is fixed to the lower shell 46. The lower shell 46 is formed so that the components described below can be fixed to it. The upper shell 48 is designed as a housing cover.

The housing device 44 is formed in the described embodiment as a common housing for an electric drive motor 50, a transmission device 52, a fan device 54 and a shaft 56 between the drive motor 50 and the transmission device 52.

The housing device has a first region 58 in which the drive motor 50 with stator and rotor is arranged. To the rotor of the drive motor 50, the shaft 56 is rotatably coupled. The housing device 44 further has a second housing region 60, which is spaced from the first housing region 58. In the second housing portion 60 sits the transmission device 52, which is torque-effectively coupled to the shaft 56. The fan device 54 in turn is coupled to the transmission device 52. From the transmission device 52, a torque is "discharged" to drive a fan 62 of the fan device 54.

Between the first housing portion 58 and the second housing portion 60, a channel 64 is arranged, which is bounded on one side (in the direction of the first end 38) by the drive motor 50 and to the other side (towards the second end 40) by the fan 62 is limited. Through the channel 64, a cooling air flow generated by the fan device 54 can flow to the drive motor 50 and flow around it.

The housing device 44 has ventilation openings 66, which are formed in particular in the form of ventilation slots. Such ventilation openings 66 are arranged on the first housing region 58 and the second housing region 60, in order to allow a corresponding air flow within the housing device 44 for cooling the drive motor 40.

The shaft 56 is guided in the channel 64 from the drive motor 50 to the transmission device 52.

The channel 64 is formed in a handle 68, which is oriented parallel to the first tube member 18 and has a correspondingly ergonomically shaped outer contour 70. The handle 68 is associated with a finger penetration region 72, which lies below the handle 68 between this and the first tubular element 18. The finger penetration region is formed by a through opening 74 in the housing device 44, wherein the opening 74 is surrounded by a wall 76 which separates an interior of the housing device 44 from the outside space. The upper shell 48 and the lower shell 46 are simply connected in a coherent manner for this opening 74.

The handle 68 and the finger penetration portion 72 formed across the aperture 74 are sized to fit the dimensions of the human hand. An operator can grasp the handle 68, in which case the hand is oriented transversely to the extension direction 20. The fingers penetrate the finger penetration area 72.

The handle 68 is aligned parallel to the first tube member 18 in a transverse direction Q spaced from the first tube member 18.

On a top side 78 of the first housing portion 58, a switch 80 for switching on and off of the drive motor 50 is arranged.

From the first housing portion 58, an electric cable 59, via which the electric drive motor 50 can be supplied with electrical energy, leads away in the direction of the first end 38 (FIG. FIGS. 7 to 9 ).

The second housing portion 60 is connected to the first tube member 18. It is in principle also possible that the first housing portion 58 with the first pipe member 18 is connected. Alternatively, it is possible for the rod element 24 to be mounted in a front region in the first tubular element 18 and to be displaceably mounted in a middle region in the housing device 44.

Parallel to the handle 68, the first housing portion 58 and the second housing portion 60 are connected in the region of the first tubular element 18 and the rod element 24 by a bridge element 82. The bridge element 82 increases the stability of the housing device 44. The first tube element 18 sits on the bridge element 82, or the rod element 24 is guided in the bridge element 82.

The transmission device 52 includes, for example, a reduction gear, which reduces the speed of the drive motor 50.

To the transmission device 52, a shaft device 84 is coupled, which leads to the tool head 14 and the tool holder 16 drives.

A second tube element 86 is connected in parallel with the housing device 44 to the first tube element 18. This second tubular element 86 has an inner space 88, in which a partial region of the shaft device 84 is guided.

The second tube member 86 is at least approximately on a same line 90 as the handle 68. On an outer periphery 92, an operator can grasp the cleaning / grinding machine 10. By positioning the second tube member 86 on the at least approximately equal line 90 as the axis for the handle 68, holding for an operator is facilitated. Advantageously, the handle 32 is also at least approximately on the line 90th

The second tube element 86 is designed in particular as a hollow tube.

With the second tube member 86, a bow member 94 is connected directly or indirectly. For example, the arch member 94 is integral with the second tubular member 86. The arch member 94 is formed as a 180 ° arc having a first portion 96 which merges into the second tubular member 86, a second portion 98 oriented parallel to the second tubular member 86 a distance in the transverse direction Q to this, wherein this distance is greater than the distance of the first tubular element 18 to the second tubular element 86, and an intermediate region 100, which connects the first region 96 and the second region 98.

A holding fork 102 with a first web element 104 and a second web element 106 is seated on the second region 98 of the bow element 94. On the holding fork 102 a bearing device 108 is arranged, via which the tool head 14 is pivotably mounted about a pivot axis 110. The bearing device 108 has a first bearing element 112a, which is arranged on the first web element 104, and a second bearing element 112b, which is arranged on the second web element 106. The pivot axis 110 is oriented transversely to the extension direction 20.

It is basically possible that the tool head 14 is pivotable about at least one further pivot axis. Another pivot axis is, for example, perpendicular to the pivot axis 110.

The second tube element 86 and the curved element 94 are rigid. The first tube member 18 is also rigid.

The shaft device 84 is guided from the second tubular element 86, starting from the region of the curved element 94, through a third tubular element 114 to the tool head 14.

The first tube element 18 and the second tube element 86 are part of the holding device 12 and have holding functions. The sheet member 94 and the second pipe member 86 hold the tool head 14. By means of the first pipe member 18 (via the rod member 24 guided therein) and the handle 68 and optionally the outer periphery 92 of the second tube member 86, an operator can hold the cleaning / grinding machine 10. The third tubular element 114 has no special holding function and can be made flexibly bendable or tubular. In a corresponding inner space 116, the shaft device is guided with a corresponding subregion 118. The third tubular element 114 is designed such that, with every possible pivoting position of the tool head 14 relative to the holding device 12, the guidance of the shaft device within the third tubular element 114 is without wall contact.

Preferably, the shaft element 84 is encased in the subregion 118.

The interior 116 is part of the suction channel 42.

The shaft device 84 comprises, for example, a first shaft element 120, which is designed to be rigid, for example. In the partial area 118, the shaft device 84 is designed to be flexible. The first shaft member 120 is connected to the portion 118. A sleeve 124 may be arranged on a corresponding connection region 122, which prevents the partial region 118 of the shaft device 84 (the flexible shaft element) from being pulled out of the connection region 122.

The third tube element 114 is formed as a 90 ° arc.

From the inner space 116 of the third tubular element 114, a channel 126 leads in the manner of a 180 ° bend to the first tubular element 18 and opens into its interior space 22. As a result, the suction channel 42 is formed which forms a fluid-effective connection between the connection 28 and the tool head 14 causes. This makes it possible to remove grinding dust and the like from a processing area on the tool head 14.

At the tool head 14, a shaft member 128 is arranged, which is rotatable with a corresponding drive from the drive motor 50 about a rotation axis 130. The shaft member 128 is operatively connected to the shaft assembly 84. The shaft element 128 lies in a central region of the tool head 14. At least approximately, the rotation axis 130 forms a central axis of the tool head 14.

The suction channel 42 opens via the interior 116 of the third tube element 114 into a corresponding central region 132 of the tool head. A corresponding suction chamber surrounds the shaft device 84 in its connection to the tool head 14 and is arranged in the central region 132. As a result, for example, a tool holding device 16, which is arranged on the tool head 14, freely rotatable relative to the tool head 14; the rotation is not obstructed by a suction port.

The suction channel 42 intersects with the channel 126, the sheet member 94. This ensures, if as a tool holder 16, for example, a corner grinder is used, a free rotation.

In the region of the curved element 94, a housing 134 with a lower shell 136 and an upper shell 138 is arranged. On the housing 134, the second tube member 86 is fixed. Also, the third tube member 114 is fixed to the housing 134. Furthermore, the first tube element 18 is fixed to the housing 134. The connection region 122 lies within this housing 134. The connection of the channel 126 with the first tube element 18 and the third tube element 114 likewise takes place within the housing 134.

Different types of tool holding devices 16 can be releasably fixed to the tool head 14. A corresponding tool holding device 16 may comprise a reduction gear. Corresponding tool holding devices are in the EP 1 719 581 A1 described, to which reference is expressly made. A corresponding Tool holding device comprises in particular a fixing device for releasably fixing to the tool head 14 and a shaft for driving a held by the tool holder 16 tool which is rotatably coupled to the shaft member 128 of the tool head 14.

A corresponding tool holding device can have a rotation axis coaxial to the rotation axis 130 or a parallel spaced rotation axis. In one embodiment, the tool holding device has a triangular outer contour. Such a tool holding device is used in particular for processing corners and the like. It is in this context in particular on the FIGS. 5 to 8 and the corresponding description in the EP 1 719 581 A1 directed.

The distance of the drive motor 50 to the tool head 14 in the extension direction 20 is fixed. The length of the holding device 12 between the handle 32 and the tool head 14 can be adjusted via the displaceability of the rod element 24 in the first tube element 18.

The distance between the drive motor 50 and the tool head 14 in the direction of extent 20 is in particular greater than 0.3 m and preferably greater than 0.5 m. This allows fatigue-free wall and ceiling work as well as tillage for an operator.

The drive motor 50 is, as in FIG. 6 shown schematically, floating in the housing device 44 mounted on the first housing portion 58. For this purpose, a plurality of elastic elements 140 is provided. The elastic elements are, for example, rubber buffers. The drive motor 50 is supported on the lower shell 46 and the upper shell 48 via the elastic elements 140. This results in a vibration damping.

The transmission device 52 is also floatingly mounted on the housing device 44 in the second housing region 60 and thereby decoupled from the drive motor 50 mounted. These are also elastic elements 140th provided (for example rubber buffer). About this, the transmission device 52 is supported on the lower shell 46 and upper shell 48.

Due to the separate floating mounting of the drive motor 50 and the transmission device 52, these are vibrationally at least partially decoupled (see below). As a result, an improved vibration damping and vibration of the housing device 44 are reduced.

The fan device 54 is preferably likewise mounted in a floating manner or connected to the transmission device 52 in such a way that it is mounted floating on the housing device 44 via this device.

The shaft 56 transmits the torque of the drive motor 50 to the transmission device 52. Thus, it causes a torque coupling of the transmission device 52 to the drive motor 50. About this coupling vibrations can be transmitted in principle.

In a third embodiment ( FIG. 9 ) is provided as a shaft 56, a rigid shaft 142, which provides for a rigid coupling of the drive motor 50 and the transmission device 52.

In preferred embodiments, the shaft 56 is not rigidly configured to provide further vibration isolation between the transmission 52 and the drive motor 50.

In a first preferred embodiment ( FIG. 7 The flexible shaft 144, which is non-rotatably connected to the rotor of the drive motor 50 and rotatably connected to an "input" of the transmission device 52 and a torque-effective coupling between a drive motor 50 and the Transmitter device 52 has, due to its flexible design, a certain transverse mobility transversely to a spacing direction 146 between drive motor 50 and transmission device 52. (The distance direction 146 is parallel to the extension direction 20.) As a result, the torque-effective coupling between the drive motor 50 and the transmission device 52 is non-rigid and there is an at least partial vibration isolation.

In a second embodiment ( FIG. 8 ), the shaft 56 is formed in several parts with at least two shaft elements, which are connected to an elastic coupling. At the in FIG. 8 In the embodiment shown, a shaft 148 is provided which has a first shaft element 150a, a second shaft element 150b and a third shaft element 150c. The first shaft member 150a is operatively connected to the second shaft member 150b via a resilient coupling 152. The second shaft member 150b is connected to the third shaft member 150c via a second elastic coupling 154. The first clutch 152 and the second clutch 154 may be formed differently. In a simple embodiment, the first clutch 152 and the second clutch 154 are rubber members. In principle, the clutches can also be designed as torsional clutches. It is also possible, for example, that the couplings are designed as universal joints (cardan joints).

The combination of different types of couplings is possible. It can also be provided only a clutch or it can be provided more than two clutches.

By providing at least one elastic coupling and at least two shaft elements takes place a vibration decoupling, since the torque coupling between the drive motor 50 and the transmission device 52 is non-rigid.

The inventive solution of the separation of the drive motor 50 and gear device 52 and their respective separate elastic mounting on a housing means 44 (wherein the drive motor 50 and the transmission device 52 may be mounted floating in the same housing or may be mounted in different housings) and the coupling via a shaft 56 of the transmission device 52 to the drive motor 50 causes increased vibration damping and thus improved operability by an operator. The transmission of vibration and noise to the housing device 44 is reduced.

The solution according to the invention can be used not only for long-neck machines such as cleaning / grinding machines, but for a wide variety of types of hand-held machine tools. A region of the housing device 44, in which the shaft 56 is arranged, need not necessarily be designed as a handle, but it may, for example, a housing without opening 74 (Fingerdurchtauchbereich 72) may be provided.

The cleaning / grinding machine 10 according to the invention functions as follows:

Depending on the application, the appropriate tool holder 16 is fixed to the tool head 14 with tools. When an operator actuates the switch 80 accordingly, the rotor of the drive motor 50 is rotated, which in turn causes rotation of the shaft 56. By the torque-effective coupling to the transmission device 52, the shaft device 84 is rotated, wherein in the formation of the transmission device 52 as a reduction gear, the shaft device 84 is rotated at a lower speed than the shaft 56th

The transmission device 52 drives the fan 62. Cooling air flows through the channel 64 and flows around the drive motor 50 for its cooling.

As a side effect, the handle 68 is heated.

An essential part of the weight of the cleaning / grinding machine 10 lies in the combination of drive motor 50 and gear mechanism 52. These are spaced from each other, wherein the handle 68 between the drive motor 50 and the transmission device 52 is located. As a result, the cleaning / grinding machine 10 can move over the handle 68 at or near its center of gravity being held. This causes a fatigue-free work. Holding on the handle 32 has essentially only a support function.

The various holding positions on the handle 32, the handle 68 and the outer periphery 92 of the second tube member 86 are in line. This provides a variety of different grip positions to a user.

The heaviest part of the cleaning / grinding machine 10, namely the drive motor 50, is when a user grips the handle 32 with one hand and the handle 68 with his other hand, between the hands.

The suction on the tool head 14 takes place centrally. The suction channel 42 and the shaft device 84 run parallel to one another in a partial region (on the first tube element 18 and the second tube element 86). The suction channel 42 crosses over the sheet element 94. The central suction allows free rotation of the tool holder 16 or of a part of the tool holder 16 on the tool head 14. This allows a high Eckenzugänglichkeit for example by means of a tool, which on a tool holder according to FIG. 8 of the EP 1 719 581 A1 is held.

The curved element 94 and the third tubular element 114, in which a part of the suction channel 42 is formed, do not hinder this rotation, since the tool holding device 16 is arranged below the curved element 94 and the third tubular element 114.

In the hand-held power tool according to the invention, the drive motor 50 and the transmission device 52 are mounted floating in the housing device 44 separately from each other. As a result, there is a vibration decoupling of the drive motor 50 and the transmission device 52. There is a lower vibration transmission and noise transmission to the housing device 44th

The drive motor 50 and the gear device 52 are connected via the shaft 56, which is advantageously non-rigid, for example, by forming the shaft as a flexible shaft 144 or as a shaft having a plurality of shaft elements, with adjacent shaft elements having an elastic coupling are coupled.

Such an arrangement may be advantageous not only for long neck machine applications. The transmission device 52 may be adapted to a corresponding application. For example, the transmission device 52 can enable a reduced rotation, for example, of a shaft element to which a tool is to be coupled, or an eccentric movement. Different speeds can be adjustable. The corresponding electric hand tool may for example be a drill, a hand-held grinding machine such as an orbital sander or the like, an angle grinder, etc.

The drive motor 50, the shaft 56 and the transmission device 52 are arranged in series. The drive motor 50 is closest to the first end 38. From the drive motor 50, the shaft 56 leads to the transmission device 52. From there, the shaft device 84 leads to the tool head 14.

Claims (15)

A hand-held cleaning / grinding machine comprising a holding device (12) for holding the cleaning / grinding machine, a drive motor (50), which is arranged on the holding device (12), and a tool head (14), which about at least one pivot axis (110 ) is pivotable relative to the holding device (12), characterized in that between the drive motor (50) and a fan device (54) for the drive motor (50) and / or a transmission device (52), a channel (64) is arranged, which is formed in a handle (68) for holding the cleaning / grinding machine. Hand-held cleaning / grinding machine according to claim 1, characterized in that below the handle (68) is a Fingerdurchtauchbereich (72). Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that the drive motor (50) and the fan device (54) and / or the transmission device (52) in a housing means (44) are arranged, and in particular that the housing device ( 44) is associated with a through opening (74) below the handle (68), and in particular that the housing means (44) comprises a first housing portion (58) in which the drive motor (50) is arranged and a spaced second housing portion (58). 60), in which the fan means (54) and / or the transmission means (52) is arranged, wherein the first housing portion (58) and the second housing portion (60) are connected by the handle (68), and in particular that the Housing device (44) has a lower shell (46) and a seat on the lower shell (46) upper shell (48). Hand-held cleaning / grinding machine according to claim 3, characterized in that the housing device (44) is arranged on a first tubular element (18), and in particular that between the first tubular element (18) and the handle (68) has a finger penetration region (72). is, and in particular, that in the first tubular element (18) a rod element (24) is determined slidably guided. Hand-held cleaning / grinding machine according to claim 4, characterized in that on the first tubular element (18) or on a rod element (24) on or in the region of the tool head (14) facing away from a handle (32) is arranged, and in particular, the handle (32) lies at least approximately in a line (90) with the handle (68). Hand-held cleaning / grinding machine according to claim 4 or 5, characterized in that in the first tubular element (18) a suction channel (42) is formed, which is in fluidly effective connection with the tool head (14), and in particular that on or in the A connection (28) for a vacuum cleaner is arranged near an end of the first tubular element (18) facing away from the tool head (14) or a rod element (24) guided in the first tubular element (18). Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that by the handle (68) a shaft (56; 142; 144; 148) is guided, which is coupled to the drive motor (50), and in particular that the Shaft (56) drives the fan device (54), and in particular that the shaft (56) is coupled to the transmission device (52), and in particular that the transmission device (52) and the fan device (54) in the same housing region (60) are arranged, and in particular that the fan device (54) is coupled to the transmission device (52), and in particular, that a shaft device (84) is guided by the transmission device (52) to the tool head (14). Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that a shaft means (84) for driving a tool at least partially in a second tube member (86) is guided, which on a housing means (44) for the fan means (54) and or the transmission device (52) is arranged, and in particular that the second tubular element (86) is parallel spaced from a first tubular element (18), and in particular that the second tubular element (86) at least approximately in a line (90) with the Handle (68) is located, and in particular that the second tubular element (86) is formed with a linear extension. Hand-held cleaning / grinding machine according to claim 8, characterized in that on the second tubular element (86) an arcuate element (94) is arranged, on which the tool head (14) in a direction (Q) transversely to the extension direction of the second tubular element (86 ) is mounted spaced from the second tubular element (86), and in particular that the curved element (94) has a region (98) which is arranged parallel to the second tubular element (86), wherein in this region a bearing device (108) for the Tool head (14) sits, and in particular that the sheet member (94) forms a 180 ° arc, and in particular that a bearing means (108) for the tool head (14) is arranged at a greater transverse distance from the second tubular element (86) as to the first tubular element (18), and in particular, that a suction channel (42) crosses the arcuate element (94), and in particular that a shaft device (84) from the second tubular element (86) through a third Roh Relement (114) is guided to the tool head (14), and in particular that the third tubular element (114) forms a 90 ° arc. Hand-held cleaning / grinding machine according to claim 9, characterized in that in the third tubular element (114) a suction channel (42) is formed which is fluidly connected to a suction channel in the first tubular element (18), and in particular that the suction channel (42 ) in the third tube element (114) surrounds the shaft device (84), and in particular that a suction channel (42) which comprises a suction chamber formed in the third tube element (114) has a region (126) which is located between the suction chamber in the third tube element (114) and a suction space in the first tubular element (18), and in particular that the region (126) is a 180 ° arc. Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that on the holding device (12) a housing (134) is arranged, through which a shaft means (84) is performed and on which a first tube element (18) and a second Pipe member (86) sit, which are connected to a housing means (44) for the drive motor (50), and on which a third tube member (114) sits, which is connected to the tool head (14). Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that a connection for a suction channel (42) on the tool head (14) surrounds a shaft device (84), and in particular that an axis of the suction channel (42) at the connection the tool head (14) is at least approximately coaxial to an axis of rotation (130) of the shaft device (84) in the region of the coupling to the tool head (14). Hand-held cleaning / grinding machine according to one of the preceding claims, characterized in that the drive motor (50) is mounted floating in a housing device (44). Hand-held cleaning / grinding machine according to claim 13, characterized in that between the drive motor (50) and the transmission device (52) has a shaft (56) is arranged, and in particular that the shaft (56) in the housing means (44) is positioned and in particular that the shaft (56) is a flexible shaft (144) or comprises a flexible shaft element, and in particular that the shaft (56) comprises at least two shaft elements (150a, 150b, 150c) via at least one flexible coupling (152, 154) are connected. Hand-held cleaning / grinding machine according to one of the preceding claims, characterized by a design as a long-necked machine, and in particular that a distance between the drive motor (50) and the tool head (14) in an extension direction (20) of the holding device (12) at least 0, 3 m.

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