EP2928642A1

EP2928642A1 - Hand-held grinding machine

Info

Publication number: EP2928642A1
Application number: EP13799309.3A
Authority: EP
Inventors: Dirk Röck; Udo Panzer
Original assignee: Flex Elektrowerkzeuge GmbH
Current assignee: Flex Elektrowerkzeuge GmbH
Priority date: 2012-12-07
Filing date: 2013-12-04
Publication date: 2015-10-14
Anticipated expiration: 2033-12-04
Also published as: DE202013104617U1; EP2928642B1; WO2014086829A4; WO2014086829A1

Abstract

To provide a hand-held grinding machine, comprising a holding device for holding the grinding machine, comprising a drive motor and comprising a tool head, wherein the holding device comprises a substantially tubular bar with a proximal end and a distal end, wherein the drive motor is arranged at the proximal end, wherein the tool head is arranged at the distal end, wherein the grinding machine comprises a transmission shaft which connects the drive motor to a tool holder of the tool head for the transmission of torque and which runs at least in sections within the tubular bar, which hand-held grinding machine permits simple, efficient and as far as possible fatigue-free grinding, it is proposed that the grinding machine comprises a suction apparatus which comprises a suction duct with a substantially annular or annular-segment-shaped suction duct section, wherein the substantially annular or annular-segment-shaped suction duct section surrounds, at least in sections, a coupling device for coupling the transmission shaft to the tool holder.

Description

Hand held grinding machine

The present invention relates to a hand-held grinding machine comprising a holding device for holding the grinding machine, a drive motor and a tool head. The holding device comprises a substantially tubular rod having a proximal end and a distal end, wherein the drive motor is disposed at the proximal end and wherein the tool head is disposed at the distal end. The hand-held grinding machine further comprises a transmission shaft which connects the drive motor for torque transmission with a tool holder of the tool head and extends at least partially within the tubular rod.

A hand-held grinder is for example from the

DE 10 2005 021 153 AI known.

The present invention has for its object to provide a hand-held grinding machine, which allows a simple, efficient and possible fatigue-free grinding.

This object is achieved by a hand-held grinding machine according to claim 1.

In one embodiment of the invention, it is provided that the grinding machine comprises a suction device which comprises a suction channel, which has a substantially annular or ring-shaped suction channel section.

A ring section-shaped suction channel section is to be understood in particular as a suction channel section which has a shape which at least approximately corresponds to a ring section, ring segment or ring sector.

It can be advantageous if the substantially annular or ring-shaped suction channel section at least partially surrounds a coupling device for coupling the transmission shaft to the tool holder.

The annular or annular section-shaped suction channel section is preferably a suction channel section arranged with respect to a suction direction downstream of the tool holder, in particular directly after the tool holder.

In particular, it can be provided that an axis of symmetry of the im

Substantially annular or annular section-shaped suction channel section at least approximately corresponds to a rotational axis of the tool holder facing the end of the transmission shaft.

An axis of symmetry of a substantially annular portion-shaped suction channel portion is preferably an axis of symmetry of a complete ring obtainable by completing the annular portion-shaped suction channel portion.

By means of a substantially annular or annular section-shaped

Absaugkanalabschnitts, which surrounds the coupling device for coupling the transmission shaft with the tool holder at least partially, can preferably a uniform suction in the tool holder, in particular a uniform extraction of abrasion during grinding, are possible.

It may be favorable if the tool holder and an end of the transmission shaft facing the tool holder have at least approximately a common axis of rotation. The tool holder and a tool receiving end facing the transmission shaft are preferably by means of one or more

Transmission, in particular by means of one or more reduction gear, connected together.

The substantially annular or annular section-shaped suction channel section preferably surrounds the coupling device, in particular a gear, for coupling the transmission shaft to the tool holder at least in sections and at least approximately concentrically.

In one embodiment of the invention, it is provided that the tool holder and a tool receiving end facing the transmission shaft are connected to each other by means of a planetary gear.

In particular, it can be provided that the coupling device for coupling the transmission shaft with the tool holder comprises a planetary gear or is formed by a planetary gear.

Under a planetary gear is in particular an epicyclic gear to understand, which in addition to frame-mounted waves also has waves that rotate on circular paths in a frame. The wheels rotating on the revolving waves orbit a central wheel similar to planets the sun.

Preferably, a drive shaft of the coupling device is aligned with an output shaft of the coupling device.

In one embodiment of the invention, it is provided that the substantially annular or annular portion-shaped suction channel section of

Suction duct of the suction device, the tool holder, one of

Tool holder facing the end of the transmission shaft and / or a hood device for covering the tool holder are arranged substantially coaxially to each other. The substantially annular or ring-shaped suction channel section of the suction channel of the suction device, the tool holder, an end of the transmission shaft facing the tool holder and / or a hood device for covering the tool holder are preferably pivotable about one or more pivot axes relative to the holding device by means of a pivoting device.

The transmission shaft is preferably formed at least partially flexible.

The tool head is preferably pivotally connected to the holding device about one or more pivot axes.

In particular, the tool head is connected by means of a pivoting device about one or more pivot axes pivotally connected to the holding device.

It may be advantageous if an end of the transmission shaft facing the tool holder is pivotable about one or more pivot axes together with the tool head, in particular can be pivoted about one or more pivot axes by means of the pivot device.

In particular, it may be provided that an end of the transmission shaft facing the tool receptacle and the tool receptacle have a common axis of rotation in each pivot position.

In one embodiment of the invention, it is provided that the hand-held grinding machine comprises two or more gears, in particular reduction gear, for coupling the drive motor with the tool holder. Preferably, at least one transmission is arranged both at an end of the transmission shaft facing the drive motor and at an end of the transmission shaft facing the tool holder.

It may be favorable if a suction channel of a suction device of the hand-held grinding machine and the transmission shaft extend at least partially together in a tubular element of the hand-held grinding machine, in particular in the tubular rod of the holding device.

Alternatively or additionally, it can be provided that the hand-held grinding machine comprises at least two tubular elements, wherein one of the tubular elements is the tubular rod, in which the transmission shaft extends at least in sections, and wherein a further tubular element forms a Absaugkanalabschnitt the suction duct of the suction device. The tubular elements are preferably arranged substantially parallel to one another.

At least one pipe element is preferably rigid, rigid, inflexible and / or inflexible.

Preferably, the tubular rod is rigid, rigid, inflexible and / or inflexible.

A tubular element may be formed in one piece. Furthermore, it can be provided that a tubular element is formed in two parts, in particular telescopic.

The substantially annular or annular portion-shaped suction channel section of the suction channel of the suction device is preferably fixed in space with the coupling device, in particular with a transmission, connected by means of which the tool holder and a tool receiving end facing the transmission shaft are coupled together. In particular, it may be provided that the substantially annular or annular section-shaped suction channel section and the coupling device are arranged together in a common housing.

The housing may be formed, for example, by one or more injection-molded components.

It may be advantageous if the substantially annular or ring-shaped suction channel section and the coupling device for coupling the transmission shaft to the tool holder are fixed in a common housing.

The substantially annular or annular section-shaped suction channel section can be formed, for example, by a separate device.

Alternatively, it may be provided that the substantially annular or annular portion-shaped suction channel section is formed at least in sections by the housing of the coupling device.

Preferably, a housing for receiving the coupling device for coupling the transmission shaft with the tool holder forms the substantially annular or ring-shaped suction channel section.

The housing and the holding device are preferably connected to one another in a pivotable manner by means of at least one pivoting element. In particular, it can be provided that the housing is connected by means of at least one pivoting element about one or more pivot axes pivotally connected to the holding device.

The substantially annular or ring-shaped suction channel section is arranged on the tool head. In particular, the im Essentially annular or ring-shaped suction channel section part of the tool head.

The substantially annular or annular portion-shaped suction channel section of the suction channel and a suction channel section of the suction channel extending within a tubular bar of the holding device or within a separate tubular element are preferably connected to each other in a fluid-efficient manner by means of a flexible suction channel section of the suction channel.

The substantially annular or annular section-shaped suction channel section preferably adjoins a transition section, at which preferably the flexible suction channel section, in particular an in

Substantially tubular flexible Absaugkanalabschnitt, is arranged.

The flexible suction duct section is preferably a flexible one

Tubular element formed.

The transmission shaft preferably runs at least in sections within a flexible tube element which surrounds and / or forms the flexible suction channel section.

In one embodiment of the invention it is provided that the tool holder can be coupled by means of the coupling device optionally with the transmission shaft or removable from the transmission shaft, in particular removable.

A rotation axis (rotation axis) of the tool holder and / or one of the tool holder facing the end of the transmission shaft is preferably substantially perpendicular to one or more pivot axes of the tool head. It may be favorable if a rotation axis (rotation axis) of a tool receptacle facing the end of the transmission shaft and one or more pivot axes of the tool head, in particular in each position of the tool head, intersect.

A tool received on the tool holder is preferably rotatable, oscillating and / or eccentrically drivable.

For attachment of the tool to the tool holder is preferably a releasable connection, in particular by means of a hook and loop fastener provided.

The tool, for example a grinding element, is preferably detachably fixable to the tool holder.

It may be favorable if the tool head comprises a hood device for covering the tool holder.

The hood device preferably comprises a hood element.

It may be favorable if the hood element comprises a hood space, in particular a substantially cylindrical hood space.

The tool holder and / or a tool arranged on the tool holder can preferably be arranged at least in sections in the hood space.

In particular, it can be provided that the tool holder can be arranged at least in sections in the hood space together with a tool arranged thereon. In one embodiment of the invention, it is provided that the hood element comprises a recess, in particular a cylinder-segment-shaped recess.

A tangent, which rests on an edge of the tool holder arranged in the tool, preferably extends substantially in one of the recess, in particular the cylinder-segment-shaped recess defining plane.

The recess bounding the plane is preferably substantially parallel to a rotational axis of the tool holder and the tool arranged thereon.

By means of a recess in the hood element, edge areas, in particular edge regions of walls, floors or ceilings, can also be processed by means of the hand-held grinding machine which would not be accessible when hood elements completely surrounding the tool holder were used.

Such a hood element with a recess, in particular a cylinder-segment-shaped recess, thus makes it possible, in particular, to achieve a simple and efficient and as fatigue-free as possible grinding.

The tool holder, the transmission shaft and the hood element are preferably rotatably arranged on a central element of the tool head.

In particular, it may be provided that the tool holder, an end of the transmission shaft facing the tool holder and the hood element are arranged rotatable about at least approximately mutually parallel axes of rotation, in particular about a common axis of rotation on a central element of the tool head. It may be favorable if an axis of symmetry of the essentially cylindrical hood space (cylinder axis) is at least approximately identical to the axis of rotation of the tool holder.

A central element of the tool head is preferably pivotally connected to the holding device about one or more pivot axes.

A central element of the tool head is preferably a housing for a coupling device for coupling the transmission shaft with the tool holder.

The central element, in particular the housing, preferably serves to receive a substantially tubular suction channel section of a suction channel of a suction device.

It can be provided that a substantially annular or annular section-shaped suction channel section of a suction channel of a suction device is formed by the central element, in particular by the housing.

The hood device preferably comprises a braking device, by means of which an undesired rotational movement of the hood element can be braked. The braking device may comprise, for example, a spring device.

It may be favorable if the hood device comprises a cover element, by means of which the recess, in particular the cylinder-segment-shaped recess, can be covered in the hood element.

Through the use of a cover, it is preferably possible to simplify extraction of abrasion occurring in the grinding operation of the grinding machine. In particular, by means of a cover preferably be avoided that in the grinding operation of the grinding machine resulting abrasion escapes through the recess from the hood space.

The cover is preferably in a covering position, in which the recess, in particular the cylinder-segment-shaped recess, is covered, and in an open position, in which the hood space is accessible through the recess, brought. In this way, the hood device can be selectively brought into a mode of operation for grinding large areas (cover in the cover position) or in an operating mode for grinding close to the edge (cover in the open position).

The cover can, for example, be rotatable, pivotable, hinged and / or releasably arranged on the hood element. In this way, the cover can be particularly easily brought from the covering position in the open position and / or from the open position to the covering position.

In particular, it can be provided that the cover element is rotatable or pivotable about an (approximately) approximately perpendicular to the axis of rotation of the tool holder aligned (pivot) axis.

Alternatively, it may be provided that the cover element is rotatable or pivotable about an (approximately) parallel to the axis of rotation of the tool holder aligned (rotary) axis.

In particular, it may be provided that the cover element, the tool holder, an end of the transmission shaft facing the tool holder and / or the hood element are rotatable about a common axis of rotation.

The cover element, the tool holder, an end of the transmission shaft facing the tool holder and / or the hood element are preferably arranged on a central element of the tool head. It can be advantageous if the hood element comprises a sealing device, in particular a brush device.

The sealing device preferably serves a gentle application of the hood element to a surface to be machined by means of the grinding machine. In particular, in this way the hood space can be sealed against an environment in order to be able to extract the abrasion occurring in the grinding operation of the grinding machine in a targeted manner.

The sealing device is preferably designed to be resilient or spring-mounted and / or arranged. As a result, the hood element can preferably be applied gently and reliably sealingly against a surface to be machined.

The sealing device, in particular the brush device, preferably extends along the circumference of the cylindrical hood space.

In particular, it may be provided that the sealing device extends along the circumference of the cylindrical hood space at least approximately from one side of the recess, in particular the cylinder-segment-shaped recess, to the opposite side of the recess, in particular the cylinder-segment-shaped recess.

It may be favorable if the cover element comprises a sealing device, for example a brush device.

By means of the sealing device, in particular the brush device, of the cover element, the sealing device, in particular the brush device, of the hood element can preferably be supplemented to a sealing device, in particular a brush device, which completely surrounds the hood space substantially annularly. Preferably, the sealing device is arranged on the cover, that in a covering position of the cover, the sealing device of the hood member and the sealing device of the cover at least approximately the hood space, in particular the cylindrical hood space, completely annular surrounding sealing ring, in particular a brush ring.

The hood device preferably comprises one or more contact sections whose surfaces form a contact surface for the lateral application of the tool head.

The contact surface preferably extends at least approximately in the plane which delimits the recess, in particular the cylinder-segment-shaped recess.

In particular, the tool head can be applied by means of the contact surfaces laterally to a wall, a floor and / or a ceiling. As a result, in particular edge regions of adjoining walls, floors and / or ceilings can be processed easily and efficiently.

The hood element may, for example, be formed in one piece with at least one contact section of the hood device.

Furthermore, it can be provided that the hood device comprises one or more separate contact elements which form one or more contact sections of the hood device.

In a further embodiment of the invention it is provided that a motor shaft rotational axis of the drive motor is aligned transversely, in particular obliquely, to a longitudinal axis of the tubular rod.

By such an orientation of the motor shaft rotational axis relative to the longitudinal axis of the tubular rod, preferably a center of gravity of the manual kept grinder specifically adjusted, in particular optimized, be. This allows a simple, efficient and fatigue-free grinding possible.

The longitudinal axis of the tubular rod is preferably a longitudinal axis, an axis of symmetry and / or a central axis of a central portion of the tubular rod between the drive motor and the tool head.

A central portion is in particular a central portion of the tubular rod, in which a center of the tubular rod (with respect to a longitudinal extent) is arranged.

It can be provided that the longitudinal axis of the tubular rod is a longitudinal axis, an axis of symmetry and / or a central axis of a central linear portion of the tubular rod between the drive motor and the tool head.

The longitudinal axis of the tubular rod may also preferably be a longitudinal axis of a region of engagement of the tubular rod which a user engages in a grinding operation of the grinding machine.

It may be favorable if a center of gravity of the drive motor and a center of gravity of the tool head are arranged on opposite sides of the longitudinal axis of the tubular rod.

Preferably, with respect to the longitudinal axis of the tubular rod, a motor side on which the drive motor is arranged can be distinguished from a tool side on which the tool is arranged.

In particular, it may be provided that the center of gravity of the hand-held grinding machine is located in the vicinity of the central portion, in particular of the central portion, of the tubular rod or within the tubular portion. shaped rod, in particular within the central portion, for example, the central portion, the tubular rod is arranged.

The tubular rod preferably comprises one or more guide elements for guiding the transmission shaft, in particular for guiding the transmission shaft within the tubular rod.

A guide element may be formed, for example, as a guide channel or as a guide ring.

In one embodiment of the invention, it is provided that the transmission shaft is designed to be flexible at least in sections.

Preferably, the transmission shaft is at least partially curved or curved in the tubular rod, in particular in a substantially linear portion of the tubular rod.

It may be favorable if the transmission shaft is guided into the tubular rod at the proximal end of the tubular rod in a direction transverse, in particular oblique, to the longitudinal axis of the tubular rod.

It can further be provided that the transmission shaft is guided into the tubular rod at the proximal end of the tubular rod substantially parallel to an axis of symmetry of the proximal end of the tubular rod.

The proximal end of the tubular rod and / or the distal end of the tubular rod preferably comprise at least one bend.

However, it may also be beneficial if the tubular rod is formed completely linear, that is, that the tubular rod is a linear

Has symmetry axis. It may be favorable if the transmission shaft is led out of the tubular rod at the distal end of the tubular rod in a direction extending transversely, in particular obliquely, to the longitudinal axis of the tubular rod.

Further, it may be provided that the transmission shaft at the distal end of the tubular rod is led out of the tubular rod substantially parallel to an axis of symmetry of the distal end of the tubular rod.

In one embodiment of the invention, it is provided that the motor shaft rotational axis and an axis of rotation of the drive motor facing the end of the transmission shaft are arranged offset from one another.

The drive motor and the transmission shaft are preferably connected to one another by means of an offset device, by means of which a rotational movement of a motor shaft of the drive motor can be transferred to an end of the transmission shaft which is offset from the motor shaft and faces the drive motor.

The offset device may be, for example, a transmission, in particular a reduction gear.

It may be favorable if an opening is provided at one end of the tubular rod, which preferably forms a base of the tubular rod, through which the transmission shaft is guided into an interior of the tubular rod or led out of the interior of the tubular rod.

Alternatively or additionally, it can be provided that the tubular rod has one or more openings at the ends of the tubular rod, in particular openings, which form a base of the tubular rod, comprising different passage openings.

Preferably, the transmission shaft is guided through such a passage opening in an interior of the tubular rod.

Alternatively or additionally, it can be provided that the transmission shaft is led out through such a passage opening from the interior of the tubular rod.

It may be favorable if an opening at one end of the tubular rod, which preferably forms a base of the tubular rod, is provided, through which opening a serving as Absaugkanalabschnitt a suction passage of a suction device interior of the tubular rod by means of at least one further Absaugkanalabschnitts with the Tool head fluid is effectively connected.

In particular, it can be provided that both openings at the ends of the tubular rod, which form the base of the tubular rod, connect a serving as Absaugkanalabschnitt the suction of the suction device interior of the tubular rod with further suction duct sections of the suction of the suction device fluidly effective.

Alternatively or additionally, it may be provided that the tubular rod comprises a passage opening different from openings at the ends of the tubular rod, by means of which an interior of the tubular rod serving as a suction channel section of a suction channel of a suction device is connected to at least one further suction channel section of the suction channel of the suction device is.

In one embodiment of the invention, it is provided that the tubular rod comprises an engagement region, on which a user engages in a grinding operation of the grinding machine. A center of gravity of the drive motor and a center of gravity of the tool head are preferably arranged on opposite sides of a longitudinal axis of the tubular rod, in particular on a motor side or on a tool side.

The hand-held grinding machine thereby preferably has a balanced weight distribution, so that a simple, efficient and as fatigue-free grinding is possible.

It may be advantageous if a motor shaft rotational axis of the drive motor is aligned substantially parallel to the longitudinal axis of the tubular rod.

Alternatively, it can be provided that a motor shaft rotational axis of the drive motor is aligned transversely, in particular obliquely, to a longitudinal axis of the tubular rod.

The motor shaft rotation axis is preferably offset from the longitudinal axis of the tubular rod.

Under a staggered arrangement is in particular a spaced, skewed or parallel arrangement to understand.

The transmission shaft for torque transmission from the drive motor to the tool holder is preferably formed at least partially flexible.

The longitudinal axis of the tubular rod is preferably a longitudinal axis of an engagement area of the tubular rod on which a user engages in a grinding operation of the grinding machine. The longitudinal axis of the tubular rod is in particular an axis of symmetry of the engagement region of the tubular rod.

The engagement region of the tubular rod is preferably arranged between the drive motor and the tool head.

A motor shaft of the drive motor and an end of the transmission shaft facing the drive motor are preferably arranged offset relative to one another with respect to a direction perpendicular to the longitudinal axis of the tubular rod and / or with respect to a direction parallel to the longitudinal axis of the tubular rod.

In one embodiment of the invention, it is provided that a motor shaft rotational axis, an axis of rotation of an end of the transmission shaft facing the drive motor and / or a rotational axis of a section of the transmission shaft extending in the engagement region of the tubular rod extend at least approximately parallel to one another.

Furthermore, it can be provided that a motor shaft rotational axis, an axis of rotation of an end of the transmission shaft facing the drive motor and / or a rotational axis of a section of the transmission shaft extending in the engagement region of the tubular rod extend transversely, in particular obliquely, to one another.

In one embodiment of the invention, it is provided that a motor shaft rotation axis, a rotation axis of the drive motor facing the end of the transmission shaft and / or a rotation axis of an extending portion of the tubular rod portion of the transmission shaft with respect to a direction perpendicular to the longitudinal axis of the tubular rod direction are offset from each other ,

It may be favorable when the drive motor and the transmission shaft are interconnected by means of an offset device. Preferably, by means of the offset device, a rotary movement of a motor shaft of the drive motor can be transferred to an end of the transmission shaft which is offset relative to the motor shaft and faces the drive motor.

The offset device comprises in particular a transmission, for example a reduction gear.

In particular, it can be provided that the offset device comprises a gear device for transmitting the rotational movement.

Furthermore, it can be provided that the offset device comprises a toothed belt device for transmitting the rotational movement.

It may be favorable if a motor shaft of the drive motor and an end of the transmission shaft facing the drive motor are arranged at least approximately coaxially with one another.

The motor shaft of the drive motor and an end of the transmission shaft facing the drive motor preferably have a common axis of rotation.

A motor shaft of the drive motor and a section of the transmission shaft extending in the engagement region of the tubular rod are preferably arranged offset relative to one another with respect to a direction perpendicular to the longitudinal axis of the tubular rod.

The motor shaft of the drive motor and a portion of the transmission shaft extending in the region of engagement of the tubular rod are preferably connected to each other by means of a flexible portion of the transmission shaft. In particular, the flexible section forms an offset device for transmitting the rotational movement of the motor shaft of the drive motor to the section of the transmission shaft extending in the engagement region of the tubular bar.

In one embodiment of the invention can be provided that a distance between the drive motor and the tool head adjustable, in particular continuously adjustable, is.

The grinding machine may comprise a telescoping device for this purpose.

The tubular rod connecting the drive motor with the tool head and / or further, for example tubular, elements for connecting the drive motor to the tool head are preferably designed to be telescopic.

For example, it can be provided that the tubular rod and / or the further tubular elements, in particular tubular elements, as well as the transmission shaft are formed at least in two parts, wherein the two parts are arranged in each case displaceable relative to each other in particular with respect to the longitudinal direction.

The two parts of the transmission shaft are preferably positively connected to each other with respect to at least one direction perpendicular to the longitudinal axis of the tubular rod, so that by means of the transmission shaft, a rotational movement can be transmitted.

The grinding machine, in particular the holding device of the grinding machine, may preferably comprise a gripping element. The grinding machine is thereby particularly easy and convenient to handle.

An interior of the tubular rod can be formed, for example, in two parts, in particular along the longitudinal axis. An interior part of the interior of the tubular rod preferably forms a suction channel section of a suction channel of a suction device.

Another interior part of the interior of the tubular rod preferably serves to receive and / or guide the transmission shaft.

The tool holder of the tool head is preferably detachable from the tool head, in particular from the coupling device, and by a tool holder of the same type or another type, for example with different shapes, different diameters and / or different types of movement (eg rotating or oscillating), interchangeable.

A hood device for covering the tool holder preferably comprises an integrally formed hood element, which in the

Surrounds substantially cylindrical hood space.

A braking device for preventing undesired rotation of the hood device relative to a central element, on which the hood element is preferably rotatably arranged, can be, for example, a

Clamping device and / or a device for frictional connection of the relatively rotatable components comprise.

Relative to a position of the hand-held grinding machine, in which the tool head with the tool holder or a tool received on the tool holder rests on a floor, the drive motor is preferably arranged above the tubular rod.

However, it can also be provided that the drive motor is arranged below the tubular rod, in particular in the region or after one or more bends of the tubular rod below the tubular rod. Furthermore, it can be provided that the drive motor connects directly to one end of the tubular rod. In particular, it can be provided in this case that the motor shaft rotational axis is at least approximately identical to an axis of symmetry of the drive motor facing the end of the tubular rod.

A center of gravity of the hand-held grinding machine is preferably arranged within the tubular rod, in particular as close as possible to the longitudinal axis, the central axis and / or the axis of symmetry of the tubular rod. In this way, even with a rotation of the hand-held grinding machine about the longitudinal axis of the tubular rod, the occurrence of the rotational movement influencing moments can be reduced or avoided altogether.

Preferably, the grinding machine has two gears, in particular two reduction gears, which are arranged on the proximal end and / or on the distal end of the tubular rod and / or on the tool head.

The center of gravity of the drive motor is preferably at least about 30 mm, in particular at least about 50 mm, for example about 55 mm, above, i. facing away from the tool head, the longitudinal axis of the tubular rod.

The motor shaft axis of rotation preferably includes an angle of at least about 5 °, more preferably at least about 10 °, for example about 12 °, with the longitudinal axis of the tubular rod. Further, the motor shaft rotation axis includes with the longitudinal axis of the tubular rod at an angle of at most about 45 °, in particular at most about 30 °.

In one embodiment of the invention can be provided that the grinding machine comprises a sheath of the transmission shaft, within which the transmission shaft rotatably arranged, in particular rotatably mounted, is.

It may be favorable if the sheathing comprises a sliding layer which is arranged between a stabilizing and / or guiding sheath of the sheath.

The sliding layer is preferably used to reduce the frictional resistance of the transmission shaft during its rotation within the casing.

The sliding layer may for example be made of a lubricant-free or self-lubricating material, for example polytetrafluoroethylene (PTFE), or comprise such a material.

The use of a sliding layer in a sheath of the transmission shaft can have a positive effect on the life of the transmission shaft.

In particular, when the transmission shaft is formed of a rust-forming material, such as steel, the possible absence of grease as a lubricant through the use of a sliding layer may allow for an extension of the life of the transmission shaft.

By using a sliding layer, as compared to lubrication with lubricant, for example grease, it is preferable to prevent or at least reduce abrasion on the transmission shaft and thus weaken external wires of the transmission shaft. In addition, it is conceivable that no more problems of consumption of lubricant occur.

In particular, when the sliding layer is formed of a material which has good or outstanding dry-running properties, lubricants, in particular separate flowable lubricants, may be superfluous. Furthermore, by the use of a sliding layer preferably the

Material selection for the material of the stabilizing and / or guide sheath are increased because preferably the material at the

Inside is irrelevant to the friction on the transmission shaft. Rust, sharp edges and / or burrs are then preferably irrelevant to the function of the grinding machine and the life of the transmission shaft.

All of the features described above, as well as the features described below in connection with the embodiments may allow an amount to a simple, efficient and fatigue-free grinding by means of hand-held grinder and are therefore combined with each other to form advantageous embodiments of the invention.

Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

In the drawings show:

Fig. 1 is a schematic perspective view of a first embodiment of a hand-held grinding machine;

Fig. 2 is a schematic side view of a tool head of the grinding machine of Fig. 1;

Fig. 3 is a vertical longitudinal section through the tool head of the grinding machine of Fig. 1;

Fig. 4 is an enlarged view of a coupling device of the tool head of FIG. 3; a schematic horizontal section through the tool head along the line 5-5 in Fig. 4; a schematic, partially sectioned side view of the grinding machine of FIG. 1 in a fully inserted position of the grinding machine; an enlarged view of the area VII in FIG. 6; one of FIG. 6 corresponding schematic side view of the grinding machine of FIG. 1 in a fully extended position thereof; an enlarged view of the area IX in FIG. 8th; a schematic side view of a tool head of a second embodiment of a grinding machine, in which a hood device is provided with a cylinder-segment-shaped recess; a schematic plan view of the tool head of FIG. 10; a schematic perspective view of the tool head of Fig. 10; 10 is a schematic side view corresponding to FIG. 10 of a tool head of a third embodiment of a grinding machine, in which the hood device comprises a cover element for covering the recess, wherein the cover element is arranged in a covering position;

FIG. 14 shows a schematic illustration, corresponding to FIG. 11, of the tool head from FIG. 13; FIG. FIG. 15 is a schematic perspective view, corresponding to FIG. 12, of the tool head from FIG. 13; FIG.

FIG. 16 is a schematic representation corresponding to FIG. 13 of the tool head from FIG. 13, wherein the cover member is disposed in an open position;

FIG. 17 is a schematic representation corresponding to FIG. 14 of the tool head from FIG. 16;

FIG. 18 is a schematic perspective view, corresponding to FIG. 15, of the tool head from FIG. 16; FIG.

FIG. 19 shows a schematic side view of FIG. 13 corresponding to FIG

Tool head of a fourth embodiment of a grinding machine, in which instead of a hinged cover member, a rotatable cover member is arranged in a covering position;

FIG. 20 is a schematic representation corresponding to FIG. 14 of the tool head from FIG. 19; FIG.

FIG. 21 is a schematic perspective view, corresponding to FIG. 15, of the tool head from FIG. 19; FIG.

FIG. 22 is a schematic side view of FIG. 19 corresponding to FIG

Tool head of the fourth embodiment of the grinding machine, wherein the cover member is arranged in an open position;

FIG. 23 is a schematic plan view of FIG. 20 corresponding to FIG

Tool head of Fig. 22; Fig. 24 is a schematic perspective view of the tool head of Fig. 22 corresponding to Fig. 21;

Fig. 25 is a partial sectional side view, corresponding to Fig. 6, of a fifth embodiment of a grinding machine in which an offset device is provided between a drive motor and a transfer shaft of the grinding machine, the offset device comprising a toothed belt device;

FIG. 26 is an enlarged view of the area XXVI of FIG. 25;

FIG. 27 is a side view corresponding to FIG. 6, partly in section, of a sixth embodiment of a grinding machine in which an offset device designed as a gear device is provided; FIG.

Fig. 28 is a schematic plan view of the grinding machine according to

Fig. 27;

FIG. 29 is an enlarged view of the area XXIX in FIG. 27;

Fig. 30 a of FIG. 6 corresponding, partially sectioned side view of a seventh embodiment of a grinding machine, in which no telescoping is provided;

FIG. 31 is an enlarged view of the area XXXI in FIG. 30;

FIG. 32 is a side view corresponding to FIG. 6, partially cut away, of an eighth embodiment of a grinding machine in which a motor shaft rotation axis is oriented transverse to a longitudinal axis of a tubular rod of the grinding machine; FIG. FIG. 33 is a vertical cross-section through the tubular rod of the grinding machine of FIG. 32 along the line 33-33 in Fig. 32;

Fig. 34 is a vertical cross section through the tubular rod of

Grinding machine from FIG. 32 along the line 34-34 in Fig. 32,

Fig. 35 shows a vertical cross section through the tubular rod of

Grinding machine from FIG. 32 along the line 35-35 in Fig. 32;

Fig. 36 is a schematic illustration of a drive motor facing portion of a tubular rod and drive motor of a ninth embodiment of a grinding machine with the drive motor disposed below the tubular rod and with the tubular rod having two bends;

Fig. 37 is a schematic representation, corresponding to Fig. 36, of a tenth embodiment of a grinding machine, the drive motor joining one end of the tubular rod and the tubular rod having a bend;

Fig. 38 is a schematic representation, similar to Fig. 36, of an eleventh embodiment of a grinding machine with the drive motor disposed above the tubular rod and an offset device formed by a flexible transmission shaft; 6 is a partially sectioned side view of a twelfth embodiment of a grinding machine, wherein a motor shaft rotation axis of the grinding motor drive motor, an axis of symmetry of an end of the tubular rod facing the drive motor, and a longitudinal axis of the tubular rod are aligned transversely to each other, and the tubular rod is at least approximately linear from the drive motor up to a flexible tube member connecting the tubular rod to the tool head;

Fig. 40 is a partial sectional side view, corresponding to Fig. 39, of a thirteenth embodiment of a grinding machine in which the connecting elements between the drive motor and the tool head have at least one bend with respect to a longitudinal axis of the tubular rod before and after a central portion of the tubular rod;

41 is a schematic sectional view through a transmission shaft of a grinding machine and a casing surrounding the transmission shaft; and

FIG. 42 is an enlarged view of the area XLII in FIG. 41. FIG.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

A first embodiment of a handheld grinding machine, generally designated 100, shown in FIGS. 1-9 includes a holding device 102 for holding the grinding machine 100, a drive motor 104 for driving a tool 106, and a tool head 108 for receiving the tool 106.

The drive motor 104 and the tool head 108 are connected to each other by means of a tubular rod 110.

The tubular rod 110 comprises at least one tubular element 112.

The tubular rod 110 is rigid and inflexible. The drive motor 104 is disposed at a proximal end 114 of the tubular rod 100.

The tool head 108 is disposed at a distal end 116 of the tubular rod 110.

The drive motor 104 is preferably arranged directly on the proximal end 114 of the tubular rod 110, for example fixed to the tubular rod 110 by means of a housing 210 of the drive motor 104.

For arranging the tool head 108 at the distal end 116 of the tubular rod 110, a pivoting device 118 is provided.

By means of the pivoting device 118, the tool head 108 is pivotable relative to the tubular rod 110.

In particular, the tool head 108 is pivotable relative to the holding device 102 of the hand-held grinding machine 100 by one or more, in particular two, pivot axes 120.

The pivoting device 118 comprises at least one pivoting element 122 for this purpose.

In particular, the pivoting device 118 comprises a pivoting element 122 designed as a pivoting fork 124.

Furthermore, the pivoting device 118 comprises a pivoting element 122 designed as a pivoting ring 126.

The pivoting fork 124 is arranged on a fastening arm 129 of the holding device 102 by means of a fastening element 128, preferably rotatable or alternatively non-rotatable. The attachment arm 129 is connected in particular to the tubular rod 110.

The pivoting fork 124 and thus also held by the pivoting fork 124 tool head 108 are pivotable relative to the mounting arm 129 about a first pivot axis 120 a.

By means of the pivoting fork 124 and the pivot ring 126, the tool head 108 is further pivotable about a second pivot axis 120b oriented perpendicular to the first pivot axis 120a.

The first pivot axis 120a and the second pivot axis 120b preferably intersect, but may for example also be arranged offset from one another.

The hand-held grinding machine 100 includes a transmission shaft 130, by means of which a rotational movement of the drive motor 104 on a tool holder 132 for receiving the tool 106 is transferable.

In particular, by means of the transmission shaft 130, a torque from the drive motor 104 to the tool holder 132 and the tool 106 arranged thereon can be transmitted.

The transmission shaft 130 extends at least in sections within the tubular rod 110.

Preferably, the transmission shaft 130 is guided within the tubular rod 110. For this purpose, guide elements 270 (to be described later) can be provided.

As in particular the Fig. 2 and 3, the tool head 108 comprises a central element 134 on which the pivoting device 118 engages. The central element 134 is in particular a housing 136 for a coupling device 138 for coupling the transmission shaft 130 with the tool holder 132.

The coupling device 138 comprises a gear 140, in particular a planetary gear 142.

A tool holder 132 facing the end 144 of the transmission shaft 130 forms a drive shaft 146 of the coupling device 138 or is connected in alignment with a drive shaft 146 of the coupling device 138.

A tool receiving shaft 148, for example, a releasable connection device 150 for releasably connecting the tool holder 132 with the coupling device 138, forms an output shaft 152 of the coupling device 138 or is connected in alignment with such output shaft 152.

In particular, due to the design of the transmission 140 as a planetary gear 142, the drive shaft 146 and the output shaft 152 at least approximately a common axis of rotation 154.

Thus, the tool holder 132 facing the end 144 of the transmission shaft 130 and the tool holder 132 have a common axis of rotation 154.

Because of this common axis of rotation 154, a quiet and low-vibration operation of the grinding machine 100 can be made possible.

As in particular Fig. 5, the planetary gear 142 includes a central wheel 143, which is also referred to as a sun gear, an outer wheel 145, which is also referred to as a ring gear, and a plurality of For example, three, epicyclic 147. The epicyclic 147 are rotatably mounted on a Umlaufradträger 149.

The drive shaft 146 engages, for example, on the central wheel 143.

The output shaft 152 engages, for example, on the Umlaufradträger 149.

The outer wheel 145 is, for example, non-rotatably connected to the housing 136.

In alternative embodiments, it may be provided that the

Drive shaft 146 engages the Umlaufradträger 149 or the outer wheel 145. The output shaft 152 then acts, for example, on the central wheel 143 or the Umlaufradträger 149, while the outer wheel 145 and the central wheel 143 rotatably connected to the housing 136.

As Fig. 3, the tool head 108 further includes a hood device 156.

The hood device 156 covers the tool holder 132.

In particular, the hood device 156 for this purpose comprises a hood element 158, which surrounds a hood space 160.

The hood space 160 is substantially cylindrical, wherein a diameter of the hood space 160 is a multiple of the height of the

Hood space 160 is.

The hood device 156 further comprises a sealing device 161, in particular a brush device 162, which extends along a circumferential direction 164 of the hood space 160 and forms a sealing ring 165, in particular an annular brush ring 166. The hood element 158, the hood space 160, the sealing device 161 and the tool holder 132 preferably have a common axis of rotation 154.

The axis of rotation 154 is in particular an axis of symmetry 168 of the hood element 158, the hood space 160, the sealing device 161 and the tool holder 132.

Due to the arrangement of the tool holder 132 and the tool 106 in the hood space 160, abrasion occurring during operation of the grinding machine 100 can be maintained within the tool head 108. In particular, the sealing device 161 can be applied to a surface to be processed so that a substantially closed hood space 160 is formed by means of the hood element 158 and the surface. Contamination of the surroundings of the grinding machine 100 can thereby be avoided.

In order to be able to remove the abrasion occurring in the grinding operation of the grinding machine 100 from the tool head 108, a suction device 170 is provided in particular.

The suction device 170 comprises a suction channel 172, which connects the hood space 160 to a suction device, for example a vacuum cleaner, which can be connected to a connection device 174 of the grinding machine 100 (not shown).

The suction channel 172 comprises a plurality of suction channel sections 176.

In particular, the suction channel 172 has a substantially annular or ring-shaped suction channel section 176a, a flexible

Suction passage section 176b and a tubular suction passage section 176c. The substantially annular or ring-shaped suction channel section 176a (see in particular FIGS. 3 and 4) at least in sections surrounds the coupling device 138 in a substantially annular manner.

In particular, the annular or ring-shaped suction channel section 176 a and the coupling device 138 at least approximately have a common axis of symmetry 168.

By means of the annular or annular portion-shaped suction channel section 176a, the abrasion occurring in the hood space 160 during the grinding operation of the grinding machine 100 can be particularly uniformly and reliably produced from the

Hood space 160 can be removed.

The annular or annular portion-shaped suction channel portion 176a is fluidly connected to the flexible suction channel portion 176b by means of a transitional portion 178.

Both the annular or ring-shaped suction channel section 176 a and the transition section 178 are formed by a suitable shaping of the housing 136 of the tool head 108.

At the transitional portion 178, a flexible tube member 180, which includes or forms the flexible suction channel portion 176b, is disposed. The flexible tube member 180 connects the housing 136 to the tubular rod 110.

As in particular the Fig. 6 and 7 can be seen, in the in Figs. 1-9 illustrated first embodiment of the hand-held grinding machine 100 provided that the drive motor 104 and the tool head 108 by means of two tubular elements 112, which are parallel to each other, are interconnected. A tubular element 112 forming the tubular rod 110, in which the transmission shaft 130 extends, adjoins the flexible suction channel section 176b and ends in the region of the drive motor 104.

The further tubular element 112, which is arranged parallel to and offset from the tubular rod 110, is fluidly connected by means of a branch 182 to the flexible tubular element 180 forming the flexible suction channel section 176b.

The further tubular element 112 extends from the branch 182 below the drive motor 104 past the same to the connecting device 174.

In the in Figs. 1-9 illustrated first embodiment of the hand-held grinding machine 100 thus separate pipe elements 112 are provided for receiving the transmission shaft 130 and the tubular Absaugkanalabschnitt 176c.

However, in sections, in particular in the flexible tube element 180, the transmission shaft 130 extends within the suction channel 172.

As can be seen in particular from FIGS. 6 to 9, the hand-held grinding machine 100 comprises, in the case of FIG. 1-9 illustrated first embodiment of a telescoping device 184, by means of which a distance of the drive motor 104 of the tool head 108 is adjustable.

In particular, this makes it possible to set a range which can be achieved during operation of the grinding machine 100.

The telescoping device 184 is formed by forming the tubular members 112 constituting the tubular rod 110 and the tubular suction passage portion 176c respectively in two parts. The tubular elements 112 each comprise an outer part 186 and an inner part 188, wherein the outer part 186 and the inner part 188 are displaceable relative to each other.

As a result, the length of the tubular elements 112 can be varied.

Also, the transmission shaft 130 is preferably formed at least in two parts, wherein a first part 130a and a second part 130b are also displaceable relative to each other.

The first part 130a and the second part 130b of the transmission shaft 130 are positively connected to one another with respect to a direction oriented perpendicular to a pull-out direction 190 of the telescoping device 184 in order to enable torque transmission.

The withdrawal direction 190, a transfer shaft rotational axis 192 of the transfer shaft 130 within the tubular rod 110, particularly in an engagement region 208 of the tubular rod 110, a longitudinal axis 194 of the tubular rod 110, a central axis 196 of the tubular rod 110 and / or an axis of symmetry 198 of the tubular rod 110 are aligned parallel to each other.

In particular, the longitudinal axis 194, the center axis 196 and the axis of symmetry 198 of the tubular rod 110 are identical.

As can be seen in particular from FIGS. 7 and 9, the drive motor 104 of the grinding machine 100 according to the first embodiment is arranged directly behind an end 200 of the tubular rod 110 facing the drive motor 104, that is behind the proximal end 114 of the tubular rod 110 ,

The drive motor 104 is coupled by means of a transmission 140, in particular a planetary gear 142, with the transmission shaft 130. A motor shaft rotation axis 202 of the drive motor 104 and a transmission shaft rotation axis 192 within the tubular rod 110 are substantially identical.

The transmission shaft 130 is guided from the drive motor 104 through an opening 283 in the tubular rod 110, which forms a base of the tubular rod 110, at the proximal end 114 of the tubular rod 110 into the tubular bar 110 and / or through an opening 283 in the tubular rod 110, which forms a base of the tubular rod 110, led out of the tubular rod 110 at the distal end 116 of the tubular rod 110.

By means of the telescoping device 184, a distance of the drive motor 104 from the tool head 108 is preferably infinitely adjustable.

For locking the drive motor 104 relative to the tool head 108, in particular for determining a desired length of the grinding machine 100, the grinding machine 100 comprises a locking device 204.

The locking device 204 may, for example, be designed as a latching device and / or as a clamping device, in particular to fix the inner parts 188 and the outer parts 186 of the tubular elements 112 relative to the pull-out direction 190 relative to one another.

The above-described first embodiment of the hand-held grinding machine 100 functions as follows.

Before a commissioning of the grinding machine 100 is by means of

Teleskopiervorrichtung 184 a desired length of the grinding machine 100 and thus set a desired distance of the drive motor 104 of the tool head 108. By means of the locking device 204 of the tool head 108 is set at the desired distance from the drive motor 104.

At the tool holder 132, a tool 106 is now arranged.

The tool holder 132 and the tool 106 are connected to each other, for example by means of a Velcro connection.

To start up the grinding machine 100, a user takes the

Grinding machine 100 on the holding device 102, in particular on a gripping element 206 and on the engagement region 208 of the grinding machine 100.

The grip element 206 is arranged in particular on the housing 210 for the drive motor 104.

The engagement region 208 is arranged in particular on the tubular rod 110.

The grip element 206 and the engagement region 208 are preferably arranged on opposite sides of the drive motor 104.

Now, when the drive motor 104 is turned on, a motor shaft 212 of the drive motor 104 is set in a rotational movement.

The motor shaft 212 is coupled to the transmission shaft 130 and transmits the rotational movement by means of the transmission shaft 130 to the tool holder 132, which is coupled to the transmission shaft 130 by means of the coupling device 138.

The tool holder 132 and the tool 106 arranged thereon are thus set in a rotational movement. The transmissions 140, namely the transmission of the coupling device 138 and the transmission 140 disposed between the drive motor 140 and the transmission shaft 130 are reduction gears, such as planetary gear 142, and reduce the rotational speed of the motor shaft 212 to a desired speed of the tool holder 132 and thus of the tool 106 ,

By means of the rotating tool 106, a grinding operation can be performed.

For this purpose, the grinding machine 100 is placed with the tool 106 on a surface to be machined, for example a wall, a floor or a ceiling.

By the rotation of the tool 106, the surface is abraded.

This creates abrasion, which can contaminate the environment without proper extraction.

In the hand-held grinding machine 100 according to FIGS. 1 to 9, the suction device 170 is provided for targeted removal of the abrasion.

For this purpose, the abrasion during machining of the surface by means of the sealing device 161 of the hood device 156 of the tool head 108 is held in the hood space 160. About the suction channel 172, the abrasion is removed from the hood space 160, in particular sucked, and fed to a suitable disposal.

In particular, the abrasion is uniformly removed from the hood space 160 by means of the annular or annular section-shaped suction channel section 176a.

Subsequently, the abrasion removed by the annular or annular suction passage portion 176 a is transmitted via the transition portion 178 fed to the flexible suction duct section 176b, from there via the branch 182 into the tubular suction duct section 176c, removed by the connecting device 174 from the grinding machine 100 and preferably fed to the suction device (not shown).

By using the planetary gear 142, the grinding machine 100 is particularly quiet, so that a simple, efficient and fatigue-free as possible grinding is possible.

One in FIGS. 10-12 illustrated second embodiment of a hand-held grinding machine 100 differs from the first embodiment shown in FIGS. 1 to 9 essentially in that the hood device 156 includes a hood member 158 having a recess 214.

The recess 214 is formed in particular substantially zyiindersegmentförmig.

As in particular the Fig. 11 and 12 it can be seen, a plane 216 bounding the recess 214 is aligned substantially parallel to the axis of rotation 154 of the tool holder 132.

The plane 216 is thus arranged and the recess 214 thus dimensioned so that a tangent 220 applied to an edge 218 of the tool 106 extends at least approximately in the plane 116.

As in particular from a comparison of FIG. 3 and 12, the recess 214 in the hood element 158 allows the tool 106 to approach, for example, an edge region or edge region of two walls.

Without such a recess 214, an edge area between two walls would not be machinable by means of the grinding machine 100. Rather, it would have to For this purpose, a separate processing by hand or by another

Grinding machine can be performed in this edge area.

The hood element 158 is arranged rotatably about the rotation axis 154 on the central element 134, in particular the housing 136. As a result, the tool head 108 can be comfortably guided along an edge region or edge region of a surface to be processed substantially independently of an alignment of the remaining grinding machine 100.

In order to prevent undesired rotation of the hood element 158, the hood device 156 has a braking device 222.

The brake device 222 may include, for example, a spring device, a friction device, or a detent device to hold the hood element 158 of the hood device 156 in a desired position.

Hood device 156 further includes two abutment elements 224.

The abutment elements 224 form abutment sections 226 of the hood device 156 for laterally applying and guiding the hood element 158 to an edge region or along an edge region, for example, in the transition region between two walls.

The contact sections 226 in this case have surfaces 228 which extend at least approximately in the plane 216 and form contact surfaces 230 for applying the hood element 158.

The abutment elements 224 and / or the abutment sections 226 can be formed in one piece with the hood element 158 (see in particular FIG. 12). Alternatively, it can be provided that the abutment elements 224 and / or the abutment sections 226 are separate, for example connected to the hood element 158, elements. As in particular Fig. 12, the sealing ring 165 of the sealing device 161, in particular the brush ring 166 of the brush device 162, is not formed in an annular manner due to the recess 214.

On the contrary, the sealing device 161 of the hood element 158 only extends from one side 232a of the recess 214 along the circumferential direction 164 of the hood element 158 to the side 232b of the recess 214 opposite the side 232a.

The recess 214 can thus result in that abrasion located in the hood space 160 can enter the environment.

However, this can be prevented by suitably dimensioned suction.

Incidentally, the second embodiment of the hand-held grinding machine 100 shown in FIGS. 10 to 12 is correct in terms of construction and

Function with the in Figs. 1-9 illustrated first embodiment, so that reference is made to the above description in this regard.

A third embodiment of a hand-held grinding machine 100 shown in FIGS. 13 to 18 essentially differs from the second embodiment shown in FIGS. 10 to 12 in that the hood device 156 comprises a cover element 234 for covering the recess 214.

The cover member 234 is arranged, for example, hinged or pivotally mounted on the hood member 158. A pivot axis 236 of the cover 234 is in particular substantially perpendicular to the axis of rotation 154 and spaced therefrom arranged.

As can be seen in particular from FIGS. 15 and 18, the covering element 134 comprises a sealing device 237, in particular a

Brush device 238.

The sealing device 237 of the cover element 234 is designed such that the sealing device 161 of the hood element 158 in the covering position of the cover element 234 shown in FIGS. 13 to 15 by means of the sealing device 237 of the cover element 234 to form a substantially complete sealing ring 165, in particular one in Essentially complete annular brush ring 166, is added.

In the covering position illustrated in FIGS. 13 to 15, the hood space 160 is preferably essentially closed by means of the cover element 234.

In the covering position of the cover 234 thus an undesirable leakage of abrasion from the hood space 160 can be effectively prevented.

In the covering position of the cover element 234, the hand-held grinding machine 100 is particularly suitable for processing larger surfaces. In order to be able to process edge areas, the cover element 234 can then be inserted into the areas shown in FIGS. 16 to 18 shown open position be brought.

Incidentally, the in Figs. 13 to 18 illustrated third embodiment of the hand-held grinding machine 100 in terms of construction and

Function with the second embodiment shown in FIGS. 10 to 12 and with the first embodiment shown in FIGS. 1 to 9, so that reference is made to the above descriptions thereof in this regard. A fourth embodiment of a hand-held grinding machine 100 shown in FIGS. 19 to 24 differs from that shown in FIGS. 13 to 18 illustrated third embodiment substantially in that the cover 234 on the central element 134, in particular on the

Housing 136, the tool head 108 is disposed and rotatable about the rotation axis 154.

The cover member 234 is preferably flexible to pass the abutment members 224 from that shown in FIGS. 19 to 21 shown covering position in the in Figs. 22 to 24 illustrated open position and to be moved back.

Incidentally, the fourth embodiment of the hand-held grinding machine 100 shown in FIGS. 19 to 24 is correct in terms of structure and

Function with the third embodiment shown in Figs. 13 to 18, so that reference is made to the above description thereof in this regard.

In another embodiment (not shown) of a hand-held grinding machine 100, the cover member 234 is removably attached to the hood member 158 so as to be selectively brought into the covering position or the open position.

One in FIGS. 25 and 26 illustrated fifth embodiment of a hand-held grinding machine 100 differs from the first embodiment shown in FIGS. 1 to 9 substantially by the fact that the drive motor 104 is coupled by means of an offset device 240 with the transmission shaft 130.

The motor shaft rotation axis 202 and the transmission shaft rotation axis 192 are parallel but at the same time offset, in particular spaced, arranged to each other. The motor shaft rotation axis 202 is further arranged in parallel and spaced from the longitudinal axis 194 of the tubular rod 110.

As in particular Fig. 25, the grinding machine 100 may extend into a motor side 244 and a tool side with respect to a longitudinal plane 242 in which the longitudinal axis 194 of the tubular rod 110 extends and which is oriented substantially perpendicular to a plane defined by the axes of symmetry 198 of the tube elements 112 246 are divided.

On the motor side 244 of the grinding machine 100, the drive motor 104 is arranged.

On the tool side 246 of the tool head 108 is arranged.

In particular, a center of gravity 248 of the drive motor 104 is arranged on the motor side 244. A center of gravity 250 of the tool head 108 is preferably arranged on the tool side 246.

The drive motor 104 and the tool head 108 are preferably arranged on opposite sides of the longitudinal axis 194 of the tubular rod 110, in particular the longitudinal plane 242.

As a result, a center of gravity 252 of the grinding machine 100 may be placed particularly close to the tubular rod 110, in particular into the tubular rod 110.

The grinding machine 100 is thereby easy to handle and allows a simple, efficient and fatigue-free as possible grinding.

As in particular Fig. 26, the offset device 240 is formed as a toothed belt device 254. The toothed belt device 254 can act as a transmission 140 and, as such, in particular a reduction in the transmission of the rotational movement from the drive motor 104 to the transmission shaft 130th

enable.

Incidentally, the fifth embodiment of the hand-held grinding machine 100 illustrated in FIGS. 25 and 26 is the same in construction and function as that shown in FIGS. 1-9 illustrated first embodiment, so that reference is made to the above description.

Furthermore, it can be provided that the fifth embodiment of the grinding machine 100 shown in FIGS. 25 and 26 comprises a hood device 156 according to the embodiments two, three or four of the grinding machine 100.

One in FIGS. 27 to 29 illustrated sixth embodiment of a hand-held grinding machine 100 differs from the fifth embodiment shown in FIGS. 25 and 26 substantially by the fact that the offset device 240 is formed as a gear device 256.

Incidentally, the in Figs. 27 to 29 illustrated sixth embodiment of the hand-held grinding machine 100 with respect to structure and function with the fifth embodiment described in Figures 25 and 26 and the embodiments described in FIGS. 1 to 24 embodiments one to four, so that reference is made to the above descriptions in this regard becomes.

A seventh embodiment of a hand-held grinding machine 100 shown in FIGS. 30 and 31 essentially differs from the first embodiment shown in FIGS. 1 to 9 in that no telescoping device 184 is provided. The distance between the drive motor 104 and the tool head 108 is in the in Figs. 30 and 31 illustrated seventh embodiment thus always constant.

Incidentally, the seventh embodiment of the hand-held grinding machine 100 shown in FIGS. 30 and 31 is the same in structure and function as in the first embodiment shown in FIGS. 1 to 9, so that reference is made to the above description thereof.

But it can also be provided that the in Figs. 30 and 31 illustrated seventh embodiment of the hand-held grinding machine 100 has one or more features of the other embodiments.

An eighth embodiment of a hand-held grinding machine 100 shown in FIGS. 32 to 35 differs from the first embodiment shown in FIGS. 1 to 9 substantially in that the drive motor 104 and the tool head 108 with only one tube element 112, namely the tubular rod 110 forming tubular element 112, are interconnected.

A telescoping device 184 is not provided.

The motor shaft rotation axis 202 is in the in Figs. 32-35 illustrated eighth embodiment of the hand-held grinding machine 100 transversely to the longitudinal axis 194 of the tubular rod 110 aligned.

In particular, the motor shaft rotational axis 202 and the longitudinal axis 194 of the tubular rod 110 enclose an angle of approximately 12 ° with each other.

The motor shaft rotation axis 202 is a motor shaft rotation axis 203 oriented transversely to the longitudinal axis 194 of the tubular rod 110. The transmission shaft 130 is formed flexible at least in the region of the tubular rod 110 and bent or curved in the tubular rod 110 is arranged.

At the drive motor 104 facing end 200 of the tubular rod 110, that is, at the proximal end 114 of the tubular rod 110, the transmission shaft 130 is guided transversely to the longitudinal axis 194 of the tubular rod 110 in the tubular rod 110.

At a tool head 108 facing the end 260 of the tubular rod 110, that is at the distal end 116 of the tubular rod 110, the transmission shaft 130 is led out in a direction transverse to the longitudinal axis 194 of the tubular rod 110 direction of the tubular rod 110.

An interior 262 of the tubular rod 110 is divided into two by means of a partition wall 264.

An interior part 266 serves to receive and guide the transmission shaft 130th

Another interior portion 268 serves as a tubular suction channel portion 176c.

In the interior 262 of the tubular rod 110, at least one guide element 270, in particular a guide channel 272, is arranged to guide the transmission shaft 130 (see in particular FIG. 34).

The guide element 270, in particular the guide channel 272, may be formed, for example, by a groove 274 arranged in the partition wall 264. Also in the in Figs. 32-35 illustrated eighth embodiment of the hand-held grinding machine 100, the drive motor 104 and the tool head 108 on opposite sides 244, 246 of the longitudinal axis 194 of the tubular rod 110, in particular the longitudinal plane 242, respectively. This also allows an advantageous weight distribution of the hand-held grinding machine 100 are made possible.

Incidentally, the eighth embodiment of the hand-held grinding machine 100 shown in Figs. 32 to 35 is correct in terms of construction and

Also, the eighth embodiment of the hand-held grinding machine 100 shown in Figs. 32 to 35 may be further developed by means of one or more features of the embodiments two to seven.

One in Fig. The ninth embodiment of a hand-held grinding machine 100 shown in FIG. 36 differs from that shown in FIGS. 25 and 26 illustrated fifth embodiment essentially in that the offset device 240 by a drive motor 104 facing the flexible end 276 of the transmission shaft 130 is formed.

The drive motor 104 facing the end 276 of the transmission shaft 130 is connected by means of a planetary gear 142 with the drive motor 104 so that an axis of rotation 278 of the drive motor 104 facing the end 276 of the transmission shaft 130 and the motor shaft rotation axis 202 are at least approximately identical.

Due to the flexible design of the transmission shaft 130, however, an offset between the motor shaft rotational axis 202 and the longitudinal axis 194 of the tubular rod 110 is possible. In particular, an offset between the motor shaft rotation axis 202 and an axis of rotation 192 of the transmission is therefore also possible. tragungswelle 130 in the engagement region 208 of the tubular rod 110 possible.

In the in Fig. 36 illustrated ninth embodiment of the grinding machine 100, the motor shaft rotation axis 202 is arranged offset in a direction perpendicular to the longitudinal plane 242 direction away from the tool head 108.

The motor shaft rotational axis 202 is arranged opposite the tool head 108 with respect to the longitudinal axis 194 of the tubular rod 110.

Nevertheless, the drive motor 104 is disposed on the same side of the tubular rod 110 as the tool head 108, because the tubular rod 110 includes two bends 280, by which the proximal end 114 of the tubular rod 110 facing the drive motor 104 is spaced from the longitudinal axis 194 of the tubular rod 110, in particular in the engagement region 208 of the tubular rod 110, and offset from the tool head 108 away.

Incidentally, the in Figs. The ninth embodiment of the hand-held grinding machine 100 shown in FIG. 36 is similar in structure and function to the fifth embodiment shown in FIGS. 25 and 26 and the embodiments 1 to 4 shown in FIGS. 1 to 24, so that reference is made to the above descriptions thereof is taken .

A tenth embodiment of a hand-held grinding machine 100 shown in FIG. 37 differs substantially from the first embodiment shown in FIGS. 1-9 in that the tubular rod 110 includes a bend 280, with the drive motor 104 directly adjacent to the proximal end 114 of the tubular rod 110 after the bend 280 connects.

The motor shaft rotational axis 202 of the drive motor 104 and an axis of symmetry 282 of the proximal end 114 of the tubular rod 110 are substantially identical. The motor shaft rotation axis 202 is a motor shaft rotation axis 203 oriented transversely to the longitudinal axis 194 of the tubular rod 110.

The bend 280 is formed so that the drive motor 104 with respect to the longitudinal axis 194 of the tubular rod 110 of the tool head 108 is arranged opposite.

Also in Fig. The ninth embodiment of the hand-held grinding machine 100 shown in FIG. 37 thus has an advantageous weight distribution.

Incidentally, the tenth embodiment of the hand-held grinding machine 100 shown in FIG. 37 is the same in construction and function as the first embodiment shown in FIGS. 1 to 9, so that reference is made to the above description thereof.

Alternatively or additionally, in the case of the tenth embodiment of the hand-held grinding machine 100 shown in FIG. 37, a further development can also be provided by means of one or more features of the further embodiments.

An eleventh embodiment of a hand-held grinding machine 100 shown in FIG. 38 differs from that shown in FIG. 36, essentially in that the tubular rod 110 has no bend 280 at least at its proximal end 114.

The drive motor 104 is disposed on a side of the tubular rod 110 opposite the tool head 108.

The transmission shaft 130 is guided through a passage opening 284 into the interior 262 of the tubular rod 110. To protect the transmission shaft 130 in the region between the housing 210 for the driving motor 104 and the tubular rod 110 may be provided (not shown) protection device.

The passage opening 284 is preferably one of the openings 283 of the tubular rod 110, which form a base of the tubular rod 110, different passage opening 284th

In particular, the passage opening 284 is arranged and / or formed in a side wall 285 of the tubular rod 110.

Incidentally, the in Fig. The eleventh embodiment of the hand-held grinding machine 100 shown in FIG. 38 is identical in construction and function to the ninth embodiment shown in FIG. 36, so that reference will be made to the foregoing description.

Also, the eleventh embodiment of the grinding machine 100 shown in FIG. 38 may be further developed by means of one or more features of the other embodiments.

One in Fig. 39 illustrated twelfth embodiment of a hand-held grinding machine 100 differs from that shown in FIGS. 32-35, substantially in that the interior portion 266 of the tubular rod 110 forming the tubular suction channel portion 176c includes a bend 280. In this way, the suction channel 172 can be passed below the drive motor 104 to save space. The housing 210 can thereby be particularly compact

be formed.

Incidentally, the twelfth embodiment of the hand-held grinding machine 100 shown in FIG. 39 is the same in structure and function as the eighth embodiment described in FIGS. 32 to 35, so that reference is made to the above description thereof. Also in Fig. 39 illustrated twelfth embodiment of the grinding machine 100 can be further developed by means of one or more features of the other embodiments.

A thirteenth embodiment of a hand-held grinding machine 100 shown in FIG. 40 differs from the twelfth embodiment shown in FIG. 39 essentially in that the tubular bar 110 includes a plurality of bends 280. The tubular rod 110 thus has a plurality of longitudinal axes 194.

In particular, the tubular rod 110 has a longitudinal axis 286 of a central portion 288 of the tubular rod 110.

The central section 288 is, in particular, a central linear section 288 between the drive motor 104 and the tool head 108.

The central portion 288 is in particular the engagement region 208 of the tubular rod 110, on which a user engages in the grinding operation of the grinding machine 100.

The central portion 288 of the tubular rod 110 is particularly that portion of the tubular rod 110 in which or near which the center of gravity 252 of the hand-held grinding machine 100 is located.

Incidentally, the in Figs. 40 illustrated thirteenth embodiment of the hand-held grinding machine 100 in terms of structure and function with the in FIG. 39 twelfth embodiment, so that reference is made to the above description thereof in this regard.

Also, the thirteenth embodiment of the grinding machine 100 shown in Fig. 40 may be further developed by means of one or more features of the other embodiments. In all embodiments of grinding machines 100, it can be provided that the transmission shaft 130 is surrounded at least in sections with a jacket 290.

As in particular the Fig. 41 and 42, the sheath 290 surrounds the transmission shaft 130 for a certain distance or substantially completely over (almost) the entire length of the transmission line

Transmission wave 130 away.

The sheath 290 extends, in particular, from the distal end 116 of the tubular rod 110 to the tool head 108 of the grinding machine 100, for example within the flexible suction channel section 176b of the suction channel 172 over the entire flexible suction channel section 176b.

The sheath 290 preferably serves to receive the transmission shaft 130 such that the transmission shaft 130 is rotatable within the sheath 290.

The jacket 290 is preferably non-rotatably connected to the drive motor 104, to the tubular rod 110 and / or to the tool head 108.

In particular, by means of the jacket 290 it is prevented that the transmission shaft 130 rubs against components of the grinding machine 100 during its rotational movement during operation of the grinding machine 100 in a region of the grinding machine 100 between the tool head 108 and the drive motor 104, as a result of which damage to the components and / or of the transmission shaft 130.

The sheath 290 preferably comprises a stabilizing and / or guiding sheath 292, by means of which the transmission shaft 130 is stable guided and in particular a buckling of the transmission shaft 130 at high bending thereof is prevented.

Furthermore, the sheath 290 preferably comprises a sliding layer 294, which is arranged between the stabilizing and / or guide sheath 292 and the transmission shaft 130.

The sliding layer 294 serves, in particular, to reduce the friction between the transmission shaft 130 and the casing 290 during rotation of the transmission shaft 130 within the casing 290 during operation of the grinding machine 100.

The sliding layer 294 is formed, for example, from a lubricant-free or self-lubricating material, in particular polytetrafluoroethylene (PTFE), or comprises such a material. In this way, in particular additional lubrication, for example grease, can be dispensed with without risking an undesirably high frictional resistance of the transmission shaft 130 in the casing 290.

The sheath 290 is preferably fixed by means of two end pieces 296 relative to the transmission shaft 130 and / or relative to the tubular rod 110 and / or relative to the tool head 108.

For this purpose, the end pieces 296 are in particular pressed onto the casing 290 and the transmission shaft 130 arranged therein. For example, it may be provided that the end pieces 296 of a metallic

Material are formed and deformed by the pressing and thus can be effectively determined.

The jacket 290 can be produced, for example, by providing the sliding layer 294 as a tube and inserting, in particular inserting, into the stabilization and / or guide jacket 292 likewise provided as a tube. Before or after this insertion the sliding layer 294 and / or the stabilizing and / or guiding sheath 292 shortened to a desired length, in particular when the sliding layer 294 and / or the stabilizing and / or guiding sheath 292 are provided as endless material.

If the sliding layer 294 and / or the stabilizing and / or guiding jacket 292 have the desired length, they can be fixed relative to one another by means of the end pieces 296, in particular by pressing on the end pieces 296.

The sliding layer 294 is clamped in particular in the stabilizing and / or guide casing 292 and thus fixed in a desired position.

In an alternative possibility of producing the sheath 290, it may be provided that during the manufacture of the stabilizing and / or guide sheath 292, for example by winding a spiral, enclosing with a steel braid and subsequent coating with plastic, at the same time an endlessly wound tube or an endlessly wound tube is introduced from a suitable material for producing the sliding layer 294.

Finally, it may alternatively or additionally be provided that the sliding layer 294 is fastened on the transmission shaft 130. Although this may possibly lead to a higher bending load of the sliding layer 294, if it rotates in the operation of the grinding machine 100 together with the transmission shaft 130. However, this can also be advantageous, for example, when mounting the sliding layer 294 on the transmission shaft 130 is simpler, more stable and / or less expensive than the installation of the sliding layer 294 on the

Stabilizing and / or guiding jacket 292. The sliding layer 294 can thus on the one hand rotationally fixed to the stabilizing and / or guide casing 292 or on the other hand rotatably connected to the transmission shaft 130.

Of course, individual features and / or advantages of the above-described variants of shells 290 can be combined with each other in any desired manner in order to obtain further advantageous variants of

To provide sheaths 290.

All of these further variants of sheaths 290 are also suitable for use in all variants of grinding machines 100.

Preferred embodiments are the following:

A hand-held grinding machine (100) comprising a holding device (102) for holding the grinding machine (100), a drive motor (104) and a tool head (108),

wherein the retainer (102) comprises a substantially tubular rod (110) comprising a proximal end (114) and a distal end (116).

wherein the drive motor (104) is disposed at the proximal end (114),

wherein the tool head (108) is located at the distal end (116),

wherein the grinding machine (100) comprises a transmission shaft (130) which connects the drive motor (104) for torque transmission with a tool holder (132) of the tool head (108) and extends at least partially within the tubular rod (110).

2. Hand-held grinding machine (100) according to embodiment 1, characterized in that the grinding machine (100) comprises a suction device (170), which comprises a suction channel (172) having a in the Substantially annular or annular section-shaped suction channel section (176a),

wherein the substantially annular or annular portion-shaped

Suction duct portion (176a) at least partially surrounds a coupling device (138) for coupling the transmission shaft (130) with the tool holder (132).

Hand-held grinding machine (100) according to embodiment 2, characterized in that the substantially annular or annular portion-shaped suction channel section (176a) at least approximately concentrically surrounds a transmission (140) for coupling the transmission shaft (130) with the tool holder (132).

Hand-held grinding machine (100) according to one of embodiments 1 to 3, characterized in that the tool holder (132) and the tool holder (132) facing the end (144) of the transmission shaft (130) by means of a planetary gear (142) are interconnected.

Hand-held grinding machine (100) according to one of embodiments 1 to 4, characterized in that a substantially annular or annular portion-shaped suction channel section (176a) of a suction channel (172) of a suction device (170), the tool holder (132), one of the tool holder (132). facing end (144) of the transmission shaft (130) and / or a hood device (156) for covering the tool holder (132) are arranged substantially coaxially to each other.

Hand-held grinding machine (100) according to one of embodiments 1 to 5, characterized in that the transmission shaft (130) is formed at least partially flexible. Hand-held grinding machine (100) according to any one of embodiments 1 to 6, characterized in that the tool head (108) about one or more pivot axes (120) pivotally connected to the

Holding device (102) is connected. Hand-held grinding machine (100) according to embodiment 7, characterized in that one of the tool holder (132) facing the end (144) of the transmission shaft (130) together with the

Tool head (108) about one or more pivot axes (120) is pivotable. Hand-held grinding machine (100) according to one of the embodiments 1 to 8, characterized in that the hand-held grinding machine (100) has two or more gears (140) for coupling the

Drive motor (104) with the tool holder (132), wherein both at one of the drive motor (104) facing the end (276) of the transmission shaft (130) and at one of the tool holder (132) facing the end (144) of the transmission shaft (130) in each case at least one transmission (140) is arranged. Hand-held grinding machine (100) according to one of embodiments 1 to 9, characterized in that the suction channel (172) of the suction device (170) of the hand-held grinding machine (100) and the transmission shaft (130) at least partially together in a tube element (112) of the hand-held Grinding machine (100) run. Hand-held grinding machine (100) according to one of embodiments 1 to 10, characterized in that the substantially annular or annular portion-shaped suction channel section (176a) is spatially fixedly connected to the coupling device (138), by means of which the tool holder (132) and one of the tool holder (132 ) facing end (144) of the transmission shaft (130) are interconnected. Hand-held grinding machine (100) according to any one of embodiments 1 to 11, characterized in that the substantially annular or annular portion Absaugkanalabschnitt (176a) at least partially by a housing (136) of the coupling device (138) for coupling the transmission shaft (130) with the tool holder (132) is formed. Hand-held grinding machine (100) according to embodiment 12, characterized in that the housing (136) by means of at least one pivoting element (122) is pivotally connected to the holding device (102). Hand-held grinding machine (100) according to one of the embodiments 1 to 13, characterized in that the substantially annular or annular portion Absaugkanalabschnitt (176a) of the suction channel (172) and within a tubular rod (110) of the holding means (102) extending Absaugkanalabschnitt (176c ) of the suction channel (172) are fluidically connected to one another by means of a flexible suction channel section (176b) of the suction channel (172). Hand-held grinding machine (100) according to embodiment 14, characterized in that the transmission shaft (130) extends at least in sections within a flexible tube element (180) which encloses and / or forms the flexible suction channel section (176b). Hand-held grinding machine (100) according to one of embodiments 1 to 15, characterized in that the tool holder (132) by means of a coupling device (138) is selectively coupled to the transmission shaft (130) or removable from the transmission shaft (130). Hand-held grinding machine (100) according to one of embodiments 1 to 16, characterized in that the tool head (108) comprises a hood device (156) for covering the tool holder (132),

wherein the hood device (156) comprises a hood element (158) comprising a substantially cylindrical hood space (160),

wherein the tool holder (132) together with a tool (106) arranged thereon can be arranged at least in sections in the hood space (160). Hand-held grinding machine (100) according to one of embodiments 1 to 17, characterized in that the hood element (158) comprises a cylinder-segment-shaped recess (214), so that a tangent (220), which at an edge (218) of the in the tool holder ( 132) arranged tool (106) is applied, in

Substantially in a cylinder-segment-shaped recess (214) bounding plane (216) extends. Hand-held grinding machine (100) according to any one of embodiments 1 to 18, characterized in that the tool holder (132), the transmission shaft (130) and the hood member (158) rotatably on a central element (134) of the tool head (108) are arranged. Hand-held grinding machine (100) according to embodiment 19, characterized in that the tool holder (132), one of the tool holder (132) facing the end (144) of the transmission shaft (130) and the hood member (158) about at least approximately mutually parallel axes of rotation (154 ) are rotatably mounted on the central element (134) of the tool head (108). Hand-held grinding machine (100) according to one of the embodiments 19 or 20, characterized in that the tool holder (132), an end (144) facing the tool holder (132) of the transmission shaft (130) and the hood element (158) about a common axis of rotation ( 154) are rotatably mounted on the central element (134) of the tool head (108). Hand-held grinding machine (100) according to one of embodiments 1 to 21, characterized in that a central element (134) of the tool head (108) about one or more pivot axes (120) is pivotally connected to the holding device (102). Hand-held grinding machine (100) according to one of embodiments 1 to 22, characterized in that a central element (134) of the tool head (108) has a housing (136) for a coupling device (138) for coupling the transmission shaft (130) with the

Tool holder (132) is. Hand-held grinding machine (100) according to one of embodiments 1 to 23, characterized in that the hood device (156) comprises a braking device (222) by means of which an undesired rotational movement of the hood element (158) can be braked. Hand-held grinding machine (100) according to one of embodiments 1 to 24, characterized in that the hood device (156) comprises a cover member (234) by means of which the cylinder segment-shaped recess (214) in the hood element (158) can be covered. Hand-held grinding machine (100) according to embodiment 25, characterized in that the cover element (234) in a

Covering position, in which the cylinder-segment-shaped recess (214) is covered, and in an open position, in which the hood space (160) through the recess (214) is accessible, can be brought. Hand-held grinding machine (100) according to any one of embodiments 25 or 26, characterized in that the cover (234) is rotatable, pivotable, hinged and / or detachably arranged on the hood element (158). Hand-held grinding machine (100) according to any one of embodiments 25 to 27, characterized in that the cover (234) about an at least approximately perpendicular to the rotation axis (154) of the tool holder (132) aligned pivot axis (236) is rotatable or pivotable. Hand-held grinding machine (100) according to any one of embodiments 25 to 28, characterized in that the cover (234) about an at least approximately parallel to the rotation axis (154) of the tool holder (132) aligned rotation axis (154) is rotatable or pivotable. Hand-held grinding machine (100) according to one of embodiments 25 to 29, characterized in that the hood element (158) comprises a sealing device (161) which extends along the circumference of the cylindrical hood space (160) at least approximately from one side (232a, 232b). the cylinder-segment-shaped recess (214) extends up to the side (232a, 232b) of the cylinder-segment-shaped recess (214) opposite this side (232a, 232b). Hand-held grinding machine (100) according to embodiment 30, characterized in that the covering element (234) comprises a sealing device (237) which is arranged on the covering element (234) such that in a covering position of the covering element (234) the sealing device (161) the hood element (158) and the sealing device (237) of the cover element (234) have a at least approximately form the cylindrical hood space (160) completely annular surrounding sealing ring (165). Hand-held grinding machine (100) according to one of embodiments 1 to 31, characterized in that the hood device (156) one or more bearing portions (226) whose surfaces (228) form a contact surface (230) for lateral application of the tool head (108) wherein the abutment surface (230) extends at least approximately in the plane (216) which delimits the cylinder-segment-shaped recess (214). Hand-held grinding machine (100) according to any one of embodiments 1 to 32, characterized in that the hood element (158) is formed integrally with at least one abutment portion (226) of the hood device (156). Hand-held grinding machine (100) according to one of embodiments 1 to 33, characterized in that a motor shaft rotation axis (203) of the drive motor (104) transversely, in particular obliquely, to a longitudinal axis (194) of the tubular rod (110) is aligned. Hand-held grinding machine (100) according to one of embodiments 1 to 34, characterized in that the longitudinal axis (194) of the tubular rod (110) has a longitudinal axis (286), an axis of symmetry (198) and / or a central axis (196) of a central portion (288) of the tubular rod (110) between the drive motor (104) and the tool head (108). Hand-held grinding machine (100) according to one of embodiments 1 to 35, characterized in that the longitudinal axis (194) of the tubular rod (110) has a longitudinal axis (286), an axis of symmetry (198) and / or a central axis (196) of a central linear From- Section (288) of the tubular rod (110) between the drive motor (104) and the tool head (108). Hand-held grinding machine (100) according to any one of embodiments 1 to 36, characterized in that the longitudinal axis (194) of the tubular rod (110) is a longitudinal axis (194) of an engaging portion (208) of the tubular rod (110) to which a user in a grinding operation of the grinding machine (100) attacks. Hand-held grinding machine (100) according to one of embodiments 1 to 37, characterized in that a center of gravity (248) of the drive motor (104) and a center of gravity (250) of the tool head (108) on opposite sides (244; 246) of the longitudinal axis (194) of the tubular rod (110). Hand-held grinding machine (100) according to one of embodiments 1 to 38, characterized in that the tubular rod (110) comprises one or more guide elements (270) for guiding the transmission shaft (130). Hand-held grinding machine (100) according to one of embodiments 1 to 39, characterized in that the transmission shaft (130) formed at least partially flexible and at least partially curved or curved in the tubular rod (110). Hand-held grinding machine (100) according to any one of embodiments 1 to 40, characterized in that the transmission shaft (130) extends at the proximal end (114) of the tubular rod (110) in a direction transverse to the longitudinal axis (194) of the tubular rod (110) Direction is led into the tubular rod (110). Hand-held grinding machine (100) according to any one of embodiments 1 to 41, characterized in that the transmission shaft (130) at the proximal end (114) of the tubular rod (110) is substantially parallel to an axis of symmetry (282) of the proximal end (114). of the tubular rod (110) is guided into the tubular rod (110). Hand-held grinding machine (100) according to one of embodiments 1 to 42, characterized in that the proximal end (114) of the tubular rod (110) and / or the distal end (116) of the tubular rod (110) has at least one bend (280). includes. Hand-held grinding machine (100) according to any one of embodiments 1 to 43, characterized in that the transmission shaft (130) extends at the distal end (116) of the tubular rod (110) in a direction transverse to the longitudinal axis (194) of the tubular rod (110) Direction out of the tubular rod (110) is led out. Hand-held grinding machine (100) according to one of embodiments 1 to 44, characterized in that the transmission shaft (130) at the distal end (116) of the tubular rod (110) substantially parallel to an axis of symmetry (198) of the distal end (116). of the tubular rod (110) is led out of the tubular rod (110). Hand-held grinding machine (100) according to one of embodiments 1 to 45, characterized in that the motor shaft rotation axis (202) and a rotation axis (278) of the drive motor (104) facing the end (276) of the transmission shaft (130) are arranged offset to one another. Hand-held grinding machine (100) according to one of embodiments 1 to 46, characterized in that the drive motor (104) and the Transmission shaft (130) by means of an offset device (240) are interconnected by means of which a rotational movement of a motor shaft (212) of the drive motor (104) on a staggered to the motor shaft (212) arranged, the drive motor (104) facing the end (276) Transmission wave (130) is transferable. Hand-held grinding machine (100) according to one of embodiments 1 to 47, characterized in that the tubular rod (110) comprises a passage (284) different from openings (283) at the ends (114; 116) of the tubular rod (110), by which the transmission shaft (130) is guided into an inner space (262) of the tubular rod (110) or led out of the inner space (262) of the tubular rod (110). Hand-held grinding machine (100) according to one of embodiments 1 to 48, characterized in that the tubular rod (110) comprises one of openings (283) at the ends of the tubular rod (110) different passage opening (284), by means of which as Absaugkanalabschnitt (176) of an exhaust duct (172) of an exhaust device (170) serving for fluid-effectively connected interior (262) of the tubular rod (110) with at least one further Absaugkanalabschnitt (176) of the suction channel (172) of the suction device (170). Hand-held grinding machine (100) according to one of embodiments 1 to 49, characterized in that the tubular rod (110) comprises an engagement region (208) on which a user engages in a grinding operation of the grinding machine (100). Hand-held grinding machine (100) according to one of embodiments 1 to 50, characterized in that a motor shaft rotation axis (202) of the drive motor (104) is aligned substantially parallel to the longitudinal axis (194) of the tubular rod (110). Hand-held grinding machine (100) according to any of embodiments 1 to 51, characterized in that a motor shaft (212) of the drive motor (104) and an end (276) of the transmission shaft (130) facing the drive motor (104) are perpendicular to the longitudinal axis (Fig. 194) of the tubular rod (110) extending direction and / or with respect to a direction parallel to the longitudinal axis (194) of the tubular rod (110) extending direction offset from each other. Hand-held grinding machine (100) according to one of embodiments 1 to 52, characterized in that a motor shaft rotation axis (202), a rotation axis (278) of the drive motor (104) facing the end (276) of the transmission shaft (130) and / or a rotation axis of extend in the engagement region (208) of the tubular rod (110) extending portion of the transmission shaft (130) at least approximately parallel to each other. Hand-held grinding machine (100) according to one of embodiments 1 to 53, characterized in that a motor shaft rotation axis (202), a rotation axis (278) of the drive motor (104) facing the end (144) of the transmission shaft (130) and / or a rotation axis of in the engagement region (208) of the tubular rod (110) extending portion of the transmission shaft (130) with respect to a direction perpendicular to the longitudinal axis (194) of the tubular rod (110) extending direction are mutually offset. Hand-held grinding machine (100) according to one of embodiments 1 to 54, characterized in that an offset device (240) comprises a gear device (256) for transmitting the rotational movement. Hand-held grinding machine (100) according to one of embodiments 1 to 55, characterized in that an offset device (240) a toothed belt device (254) for transmitting the rotational movement comprises. Hand-held grinding machine (100) according to one of the embodiments 1 to 56, characterized in that a motor shaft (212) of the drive motor (104) and the drive motor (104) facing the end (276) of the transmission shaft (130) are at least approximately coaxial with each other , Hand-held grinding machine (100) according to any one of embodiments 1 to 57, characterized in that a motor shaft (212) of the drive motor (104) and a portion of the transmission shaft (130) extending in the engagement region (208) of the tubular rod (110) with respect to a perpendicular to the longitudinal axis (194) of the tubular rod (110) extending direction are mutually offset. Hand-held grinding machine (100) according to embodiment 58, characterized in that the motor shaft (212) of the drive motor (104) and the portion of the transmission shaft (130) extending in the engagement region (208) of the tubular rod (110) are connected by means of a flexible portion of the transmission shaft ( 130) are interconnected. Hand-held grinding machine (100) according to one of embodiments 1 to 59, characterized in that the grinding machine (100) comprises a sheath (290) of the transmission shaft (130), within which the transmission shaft (130) rotatably arranged, in particular rotatably mounted. Hand-held grinding machine (100) according to embodiment 60, characterized in that the sheath (290) comprises a sliding layer (294), which between a stabilizing and / or

Guide sheath (292) of the sheath (290) is arranged and in particular, the reduction of the frictional resistance of the transmission shaft (130) during their rotation within the sheath (290) is used.

Hand-held grinding machine (100) according to embodiment 61, characterized in that the sliding layer (294) of a lubrication-free or self-lubricating material, such as polytetrafluoroethylene (PTFE), is formed.

LIST OF REFERENCE NUMBERS

100 grinding machine

102 holding device

104 drive motor

106 tool

108 tool head

110 tubular rod

112 pipe element

114 proximal end

116 distal end

118 pivoting device

120 pivot axis

120a first pivot axis

120b second pivot axis

122 pivoting element

124 pivoting fork

126 swivel ring

128 fastener

129 mounting arm

130 transmission wave

130a first part of the transmission wave

130b second part of the transmission wave

132 Tool holder

134 central element

136 housing

138 coupling device

140 gears

142 planetary gear

143 central wheel (sun wheel)

144 of the tool holder 132 facing the end of the transmission shaft 130th

145 outer wheel (ring gear) 146 drive shaft

147 planetary gear

148 Tool receiving shaft

149 planet wheel carrier

150 detachable connection device

152 output shaft

154 axis of rotation

156 hood device

158 hood element

160 hood space

161 sealing device

162 brush device

164 circumferential direction

165 sealing ring

166 brush ring

168 symmetry axis

170 suction device

172 suction channel

174 connection device

176 suction duct section

176a annular or annular portion Absaugkanaiabschnitt

176b flexible Absaugkanaiabschnitt

176c tubular Absaugkanaiabschnitt

178 transitional section

180 flexible pipe element

182 diversion

184 Telescoping device

186 outer part

188 inner part

190 pull-out direction

192 transmission shaft rotation axis

194 longitudinal axis of the tubular rod 110th

196 central axis of the tubular rod 110th 198 axis of symmetry of the tubular rod 110

200, the drive motor 104 facing the end of the tubular rod 110th

202 motor shaft rotation axis

203 Motor shaft rotation axis

204 locking device

206 handle element

208 attack area

210 housing

212 motor shaft

214 recess

216 level

218 edge

220 tangent

222 brake device

224 contact element

226 investment section

228 surface

230 contact surface

232a page

232b page

234 cover element

236 pivot axis

237 sealing device

238 brush device

240 offset device

242 longitudinal plane

244 engine side

246 tool side

248 center of gravity of the drive motor 104

250 center of gravity of the tool head 108

252 center of gravity of the grinding machine 100

254 toothed belt device 256 gear device

260 end

262 interior

264 partition

266 Interior part

268 Interior part

270 guide element

272 guide channel

274 groove

276 of the drive motor 104 facing the end of the transmission shaft 130th

278 axis of rotation

280 bend

282 symmetry axis

283 opening

284 opening

285 side wall

286 longitudinal axis

288 central section

290 sheathing

292 Stabilizing and / or guiding jacket

294 sliding position

296 tail

Claims

claims

wherein the drive motor (104) is disposed at the proximal end (114),

wherein the tool head (108) is located at the distal end (116),

wherein the grinding machine (100) comprises a transmission shaft (130) which connects the drive motor (104) for torque transmission with a tool holder (132) of the tool head (108) and extends at least in sections within the tubular rod (110), characterized in that the grinding machine (100) a suction device (170) comprising a suction channel (172) having a substantially annular or ring-shaped suction channel section (176a),

wherein the substantially annular or annular portion-shaped suction channel section (176a) at least partially surrounds a coupling device (138) for coupling the transmission shaft (130) to the tool holder (132).

Hand-held grinding machine (100) according to claim 1, characterized in that the substantially annular or annular portion-shaped suction channel section (176a) is a transmission (140) for Coupling of the transmission shaft (130) with the tool holder (132) at least partially and at least approximately concentrically surrounds.

3. Hand-held grinding machine (100) according to any one of claims 1 or 2, characterized in that the tool holder (132) and one of the tool holder (132) facing the end (144) of the transmission shaft (130) by means of a planetary gear (142) are interconnected ,

4. hand-held grinding machine (100) according to one of claims 1 to 3, characterized in that the substantially annular or annular portion-shaped suction channel (176a) of the suction channel (172) of the suction device (170), the tool holder (132), a tool holder ( 132) facing the end (144) of the transmission shaft (130) and / or a hood device (156) for

Cover the tool holder (132) are arranged substantially coaxially to each other.

5. Hand-held grinding machine (100) according to one of claims 1 to 4, characterized in that the transmission shaft (130) is formed at least partially flexible.

6. hand-held grinding machine (100) according to one of claims 1 to 5, characterized in that the tool head (108) about one or more pivot axes (120) is pivotally connected to the holding device (102).

7. hand-held grinding machine (100) according to claim 6, characterized in that one of the tool holder (132) facing the end (144) of the transmission shaft (130) together with the tool head (108) about one or more pivot axes (120) is pivotable.

8. hand-held grinding machine (100) according to one of claims 1 to 7, characterized in that the hand-held grinding machine (100) comprises two or more gear (140) for coupling the drive motor (104) with the tool holder (132), wherein both an end (276) of the transmission shaft (130) facing the drive motor (104) and at least one transmission (140) each being arranged on an end (144) of the transmission shaft (130) facing the tool holder (132).

9. hand-held grinding machine (100) according to one of claims 1 to 8, characterized in that the suction channel (172) of the suction device (170) of the hand-held grinding machine (100) and the transmission shaft (130) at least partially together in a tubular element (112) of the hand-held grinder (100).

10. Hand-held grinding machine (100) according to one of claims 1 to 9, characterized in that the substantially annular or annular portion-shaped suction channel (176a) is spatially fixedly connected to the coupling device (138), by means of which the tool holder (132) and one of the tool holder (132) facing end (144) of the transmission shaft (130) are interconnected.

11. hand-held grinding machine (lOO) according to one of claims 1 to 10, characterized in that the substantially annular or annular portion Absaugkanalabschnitt (176a) at least partially through a housing (136) of the coupling device (138) for coupling the transmission shaft (130) the tool holder (132) is formed.

12. Hand-held grinding machine (100) according to claim 11, characterized in that the housing (136) by means of at least one

Swivel element (122) is pivotally connected to the holding device (102).

13. Hand-held grinding machine (100) according to one of claims 1 to 12, characterized in that the substantially annular or annular portion-shaped suction channel section (176a) of the suction channel (172) and within a tubular rod (110) of the holding device (102) extending Absaugkanalabschnitt (176c) of the suction channel (172) by means of a flexible suction channel portion (176b) of the suction channel (172) are fluidly interconnected.

14. Hand-held grinding machine (100) according to claim 13, characterized in that the transmission shaft (130) extends at least in sections within the flexible suction duct section (176b) comprising and / or forming flexible tubular element (180).

15. Hand-held grinding machine (100) according to any one of claims 1 to 14, characterized in that the tool holder (132) by means of the coupling device (138) optionally with the transmission shaft (130) can be coupled or removed from the transmission shaft (130).

16. Hand-held grinding machine (100) according to one of claims 1 to 14 or according to the preamble of claim 1, characterized in that the grinding machine (100) comprises a sheathing (290) of the transmission shaft (130), within which the transmission shaft (130) rotatably arranged, in particular rotatably mounted, is.

17. Hand-held grinding machine (100) according to claim 16, characterized

characterized in that the sheath (290) comprises a sliding layer (294) which is arranged between a stabilizing and / or guiding sheath (292) of the sheath (290) and in particular the reduction of the frictional resistance of the transmission shaft (130) as it rotates within the sheath Sheath (290) is used. Hand-held grinding machine (100) according to claim 17, characterized in that the sliding layer (294) is formed of a lubrication-free or self-lubricating material, for example polytetrafluoroethylene (PTFE).