EP2033738A2 - Ponçeuse portable et dispositif porte-outil - Google Patents

Ponçeuse portable et dispositif porte-outil Download PDF

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Publication number
EP2033738A2
EP2033738A2 EP09150029A EP09150029A EP2033738A2 EP 2033738 A2 EP2033738 A2 EP 2033738A2 EP 09150029 A EP09150029 A EP 09150029A EP 09150029 A EP09150029 A EP 09150029A EP 2033738 A2 EP2033738 A2 EP 2033738A2
Authority
EP
European Patent Office
Prior art keywords
tool
holding device
shaft
grinding machine
holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09150029A
Other languages
German (de)
English (en)
Other versions
EP2033738B1 (fr
EP2033738A3 (fr
Inventor
Udo Panzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flex Elektrowerkzeuge GmbH
Original Assignee
Flex Elektrowerkzeuge GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Flex Elektrowerkzeuge GmbH filed Critical Flex Elektrowerkzeuge GmbH
Publication of EP2033738A2 publication Critical patent/EP2033738A2/fr
Publication of EP2033738A3 publication Critical patent/EP2033738A3/fr
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Publication of EP2033738B1 publication Critical patent/EP2033738B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/182—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
    • B24B7/184—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings pole sanders

Definitions

  • the invention relates to a hand-held grinding machine, comprising a holding device for holding the grinding machine, a drive motor which is arranged on the holding device, a tool head which is pivotable about at least one pivot axis relative to the holding device and has a driven via the drive motor tool drive shaft, a transmission device for Torque transmission from the drive motor to the tool drive shaft, and a tool holding device having a shaft which is coupled to the tool drive shaft or is coupled.
  • a motorized sander which comprises a drive motor mounted on a distal end of a tubular rod and a flexible drive shaft operatively coupled to the drive motor and extending along the length of the tubular rod.
  • a sanding pad is operatively coupled to the flexible drive shaft, which shaft provides for effective coupling at different positions of the head with respect to the tubular rod.
  • an electric hand tool in which a tool holder is coupled via a spindle with a drive shaft in a transmission housing, wherein the transmission housing is formed in two parts is and the two parts of the gear housing in an oblique to the drive shaft and the spindle extending Vercarde are rotated relative to each other and can be locked in the desired rotational position.
  • the invention has for its object to provide a hand-held grinding machine of the type mentioned, which has extended uses.
  • the tool holding device has a shaft which is coupled to the tool drive shaft or can be coupled. It may in principle be a separate element, which is connectable to the tool drive shaft. It is also possible, when the tool holding device is integrally formed on the tool head, that this shaft and the tool drive shaft are integrally formed.
  • the shaft is designed as an eccentric shaft. As a result, for example, a tool can be driven in an oscillatory motion.
  • the tool holding device has a transmission, via which the shaft is coupled to the tool drive shaft or can be coupled.
  • the gear can be used to set a specific movement type of a tool.
  • the transmission is designed as a reduction gear. If a certain high speed is provided by the drive motor, gear reduction may be required for some applications to drive a tool at a lower speed than the maximum speed provided.
  • the shaft of the tool holding device has a rotation axis coaxial to the axis of rotation of the tool drive shaft of the tool head.
  • a corresponding tool holding device can be formed with small transverse dimensions.
  • a corresponding tool holding device is suitable for concrete grinding, for example.
  • a tool holding device is rotatable about at least one axis of rotation which is substantially parallel to or coincides with the axis of rotation of the tool drive shaft.
  • the rotation may be one full turn or one turn less than 360 °.
  • a tool holding device and thus a tool can be aligned; This is particularly advantageous if the tool is not rotationally symmetrical.
  • a tool holding device has a triangular outer contour in order to enable a grinding process at corners or edges.
  • Such a rotatability can be achieved in a simple manner if the tool head has a region with a cylindrical outer contour for forming a pivot bearing for the tool holding device. This makes it possible to provide an inner shaft on which an outer shaft can be guided.
  • the tool head has a securing device in order to lock the rotatability of a tool holding device on the tool head.
  • a securing device in order to lock the rotatability of a tool holding device on the tool head.
  • This is particularly advantageous when various tool holding devices are provided as attachments that can be fixed to the tool head.
  • a rotation lock must be provided in order to carry out a machining operation.
  • rotation may be required.
  • the rotatability can then be blocked or released via the securing device.
  • the tool head is assigned a fixing device for fixing a tool holding device. It can basically be provided that the tool holding device is arranged integrally on the tool head. In particular, a shaft of the tool holding device is then formed by the tool drive shaft.
  • the tool holding device is detachably fixable. It can then, for example, a basic unit with a drive motor, the rigid shaft and the tool head are provided, wherein the tool head various tool holding devices depending on the application placed are.
  • the tool holder attachments may differ, for example, with regard to the rotational speed or else the type of drive (rotating or oscillating). You can also differ by which tool can be fixed to them.
  • the shaft of the tool holding device has a rotation axis spaced parallel to the axis of rotation of the tool drive shaft of the tool head. This spacing can be achieved for example by the provision of a transmission.
  • the holding device has a holding bar. This has, for example, a circular outer contour. About such a holding rod, the grinding machine can be easily hold.
  • the holding rod is designed as a hollow body.
  • a cavity is provided, can be transported through the fluid.
  • a fluid line is arranged to be able to vacuum over a vacuum cleaner processing residues.
  • the retaining bar is designed as a fluid guiding element or a fluid guiding element is arranged on the retaining bar.
  • the holding rod then serves in addition to holding for a user as a "holder” for a fluid guide element or forms a fluid guide element itself.
  • a fluid line is connected to the support rod or on the support rod, a fluid line is guided, which is coupled to the tool head. This makes it easy to perform a machining residue extraction from a processing area.
  • the tool head and / or a tool holding device have one or more fluid spaces which are in fluid-effective connection with a fluid line. As a result, it is possible to provide an extraction area or several extraction spaces in the immediate vicinity of a processing area.
  • the length of the holding device is adjustable relative to the tool head.
  • a user can adapt the length of the holding device to the application. This results in improved application possibilities.
  • the holding device has a first holding element and a second holding element, which are lockable relative to each other.
  • the holding elements can also be rotatable relative to each other.
  • the second holding element is guided displaceably in the first holding element.
  • the holding elements are formed, for example, as tubes, wherein the second holding element is guided in the first holding element.
  • the determination of the second holding element on the first holding element can be achieved in a simple manner, for example by a screw-clamp connection.
  • the second holding element is displaceably guided on the first holding element.
  • the first holding element is, for example, a stationary element which protrudes, for example, over a housing of the drive motor.
  • the first holding element is designed such that in each displacement position, the second holding element lies completely on the first holding element. As a result, a stable holding device is provided for each position of the second holding element.
  • an outer end of the holding device is formed by the first holding element.
  • a grip element is arranged on the second holding element.
  • the gripping element can be held, for example, with the right hand, and the second holding element or the first holding element can be grasped with the left hand.
  • the holding elements are correspondingly designed in their outer contour so that they can be gripped ergonomically.
  • the grip element has a holder for an electric cable.
  • the electric cable can be fixed in order to guide this defined on the grinding machine.
  • first holding element or the second holding element or a fluid line (which is guided in the first or second holding element) has a vacuum cleaner connection.
  • a negative pressure can be generated in a simple manner on a processing area in order to be able to vacuum out processing residues.
  • the invention is further based on the object to provide a tool holder of the type mentioned, which is used in a simple manner.
  • the shaft is designed as an eccentric shaft.
  • a grinding machine with a tool head is a basic unit to which the tool holder can be releasably fixed as an attachment.
  • a basic unit with a uniform number of revolutions can then be provided, wherein a defined speed can be set by means of a gear in the tool-holding device.
  • a concrete grinder attachment can be provided on which a high speed grinding tool is driven.
  • the tool holding device is rotatable about an axis of rotation parallel to the axis of rotation of the tool drive shaft rotatably fixed to the tool head. This is favorable, for example, when corner areas or edge areas are to be ground. An operator can then set up at a greater distance to such a corner area or edge area.
  • An embodiment of the tool holding device may have one or more locking elements for blocking the rotatability of the tool holding device about an axis of rotation parallel to the axis of rotation of the tool drive shaft.
  • the tool holding device has a triangular outer contour, at least in a partial region. With such an outer contour, the tool holding device can be positioned in a simple manner on edge regions or corner regions. This results in an extended grinding area.
  • an axis of rotation for rotatability of the tool holding device relative to the tool head pierces the triangle at or in the vicinity of a center of gravity of a triangle of a triangular outer contour.
  • the center of gravity is the geometric center of gravity.
  • a tool can be driven in an oscillating manner on the tool holding device.
  • the corresponding tool holding device is in particular an eccentric grinder. Due to the oscillating driving otherwise difficult to access areas such as corner areas and edge areas can be processed for grinding operations by a cylindrical grinder.
  • the oscillating movement of the tool is achieved for example by an eccentric drive. It is provided an eccentric shaft. It can also be used another eccentric drive.
  • elastic elements are located on or in the vicinity of corners of the tool holding device in order to be able to drive the tool in an oscillating manner.
  • An embodiment of a hand-held grinding machine according to the invention which in the FIGS. 1 and 2 shown and designated therein by 10, comprises a holding device 12, via which a user can hold the grinding machine 10 during processing.
  • a tool head 14 is arranged, on which a tool holding device 16 is releasably or permanently fixed or can be fixed.
  • the holding device 12 comprises a (rigid) holding rod 18 as the first holding element 19.
  • This holding bar 18 is formed as a hollow body and in particular tubular.
  • the holding bar 18 preferably has an edge-free outer contour and inner contour; For example, the outer contour and the inner contour are cylindrical.
  • a (rigid) second holding member 20 is slidably guided.
  • the second holding member 20 is also formed as a hollow body and, for example, tubular. It is adapted with its outer contour to the inner contour of the support rod 18, so that in the support rod 18, a displacement guide is provided.
  • the second holding element 20 can also be guided rotatably in the holding bar 28.
  • the distance of the gripping element 22 from the tool head 14 and thus the length of the holding device 12 with respect to the tool head 14 can be adjusted.
  • the position of the second holding element 20 relative to the first holding element 19 is infinitely adjustable.
  • a screw-clamping device 26 is provided with a nut 28 (FIG. FIGS. 1 to 3 ). This nut 28 is guided on the first holding element 19 via a thread 30 ( FIG. 3 ) And with the second holding member 20 can be clamped. Due to the jamming of the nut 28 and the second holding member 20, the position of the second holding member 20 is fixed to the first holding member 19.
  • the nut 28 also serves as a blocking element for the submersibility of the second retaining element 20 in the first retaining element 19: When the grip element 22 abuts the nut 28 ( FIG. 3 ), then the second element 20 can not move further into the first holding element 19.
  • FIGS. 1 and 3 a position of the second holding member 20 with respect to the first holding member 19 is shown, in which the holding device 12 has a minimum length relative to the tool head 14; the second retaining element 20 is so far immersed in the first retaining element 18 that the grip element 22 rests against the nut 28.
  • FIG. 2 an extended position of the holding device 12 is shown, in which the gripping element 22 is spaced from the nut 28.
  • the grip element 22 has a holder 32 on which an electric cable 34 for cable management can be fixed.
  • the second element 22 may have a vacuum cleaner port 36 at one end to connect a vacuum cleaner (not shown in the drawing).
  • a housing 38 On the holding bar 18, a housing 38 is fixed in a central region, in which a drive motor 40 (FIG. FIG. 3 ) is arranged.
  • the housing 38 is designed such that a motor shaft 42 is positioned at a distance from the holding bar 18 substantially parallel to a longitudinal direction 44 of the holding bar 18.
  • the second holding element 20 In the longitudinal direction 44, the second holding element 20 is guided relative to the retaining rod 18 as the first holding element 19 releasably displaceable.
  • the drive motor 40 is arranged below the holding rod 18.
  • the drive motor 40 is supplied via the electric cable 34 with electrical energy.
  • a sealed switch 46 is arranged on the housing 38.
  • a gear 48 may be arranged, which is in particular a reduction gear.
  • the speed can be reduced. (It is basically also possible to provide a transmission gear or a non-speed-changing transmission.
  • the motor shaft 42 is coupled directly or via the gear 48 to a rigid shaft 50, which is guided to the tool head 14.
  • the rigid shaft 50 is oriented parallel to the longitudinal direction 44 of the holding rod 18. It is parallel or coaxial with the motor shaft 42.
  • the rigid shaft 50 is guided in a (rigid) hollow body 52, which is arranged parallel to the holding rod 18.
  • the hollow body 52 is in particular tubular. It is fixed to the housing 38 at one end 54.
  • a central region 56 of the hollow body 52 is connected via a web 58 with the holding bar 18.
  • the web 58 is arranged on or in the region of one end 60 of the holding rod 18, wherein this end 60 is located on a region of the holding rod 18, which extends beyond a side 62 of the housing 38 also.
  • the side 62 of the housing 38 is opposite to a side 64, over which that part of the support rod 18 extends, on which the screw-clamping device 26 is arranged.
  • the motor shaft 42 rotates about a rotation axis 66 which is substantially parallel to the longitudinal direction 44.
  • the rigid shaft 50 rotates (driven by the drive motor 40) about an axis of rotation 68 which is substantially parallel to the axis of rotation 66 of the drive motor 40.
  • the rotation axis 68 is offset parallel to the rotation axis 66, that is, this has a greater distance to the support rod 18 as the axis of rotation 66 of the drive motor 40.
  • a transmission is provided which does not have a reduction gear is to increase the distance of the rotation axis 68 of the support rod 18 as compared to the motor shaft 42.
  • axis of rotation 68 and the axis of rotation 66 are coaxial.
  • the rigid shaft 50 rotates about the axis of rotation 68 and is freely supported in the (rigid) hollow body 52, that is, the rigid shaft 50 is spaced from the walls of the hollow body 52 out.
  • the tool head 14 is pivotable about a pivot axis 70 relative to the holding device 12.
  • the pivot axis 70 is transverse and in particular perpendicular to the axis of rotation 68 of the rigid shaft 50, for each pivot angle 72.
  • the pivot angle 72 is defined in a plane which through the axis of rotation 68 of the rigid shaft 50 and a direction 74 perpendicular to a Tool active surface is clamped. At a pivoting angle of 0 °, the direction 74 and the axis of rotation 68 of the rigid shaft 50 are coaxially oriented.
  • the pivot axis 70 is perpendicular to this plane.
  • the pivotability of the tool head 14 on the holding device 12 is provided by a pivoting of the tool head 14 on the hollow body 52.
  • a pivot bearing 76 is provided ( FIG. 4 ), which is arranged in a housing 78 of the tool head 14.
  • the pivot bearing 76 includes, for example, a cylindrical pin 80 which is rotatably disposed in the housing 78. This cylindrical pin 80 forms an inner shaft.
  • a ring member 82 is guided, which forms an outer shaft.
  • This ring member 82 is firmly seated on the hollow body 52; it is (movably) positioned in the housing 78.
  • the housing 78 has an opening 84 through which a part 86 of the hollow body 52 is guided, on which the ring element 82 is fixed.
  • the breakthrough opening 84 is in this case designed such that the swivel angle range is fixed over it, and furthermore the "zero position" (swivel angle 0 °) is defined.
  • the pivoting angle 0 ° is determined by the fact that the part 86 bears against a first wall 88 of the aperture 84.
  • the maximum pivoting angle (which is, for example, in the range between 30 ° and 80 °) is defined by the fact that the part 86 rests against a wall 90 of the opening 84 opposite the first wall 88. (In FIG. 4 this concern is shown at maximum swing angle.)
  • a tool drive shaft 92 is rotatably mounted about a rotation axis 94.
  • the axis of rotation 94 is coaxial with the direction 74, that is, the axis of rotation 94 and the axis of rotation 68 of the rigid shaft 50 span a plane to which the pivot axis 70 is perpendicular.
  • the tool drive shaft 92 is mounted in the housing 78 of the tool head 14 via a first pivot bearing 96 and a spaced second pivot bearing 98.
  • These rotary bearings 96, 98 are in particular ball bearings.
  • the rigid shaft 50 is rotatably mounted in the region of one end of the hollow body 52 via a rotary bearing 100, such as a ball bearing, in order to obtain a defined guidance and attack on the tool head 14.
  • a rotary bearing 100 such as a ball bearing
  • This transmission device 102 comprises a gear 104 for coupling the rigid shaft 50 to the tool drive shaft 92.
  • the rigid shaft 50 is a drive shaft relative to this gear 104 and the tool drive shaft 92 is an output shaft relative to this gear 104.
  • the gear 104 is formed so that the tool drive shaft 92 is driven at the same speed as the rigid shaft 50 and thereby the pivoting of the tool head 14 is ensured on the holding device 12.
  • the transmission 104 is disposed in the housing 78 on the pivot bearing 76. It is designed as a gear transmission and in particular as a bevel gear.
  • the gear 104 is formed so that the axis of rotation 68 of the rigid shaft 50 and the axis of rotation 94 of the tool drive shaft 92 at cut each relative position of the tool head 14 to the rigid shaft 50 in one point. This intersection lies on the pivot axis 70.
  • the transmission 104 comprises an annular gear 106, which is arranged rotatably about an axis of rotation in the housing 78, wherein this axis of rotation coincides with the pivot axis 70.
  • a bevel gear 108 is arranged, which engages with teeth in corresponding teeth of the gear 106; by rotation of the rigid shaft 50, the gear 106 is rotated.
  • At one end of the tool drive shaft 92 also sits a bevel gear 110, which is coupled to the gear 106.
  • the gear 106 By rotation of the gear 106, the tool drive shaft 92 is rotated, that is, the gear 106 transmits the torque of the rigid shaft 50 to the tool drive shaft 92. This torque transmission is independent of the pivot angle 72 of the tool head 14 with respect to the holding device 12th
  • a cover 112 is arranged, which is in particular designed as a sleeve. This cover 112 serves to cover the aperture 84 to prevent the ingress of dust, liquid and the like into the housing 78.
  • the cover 102 is formed as a bellows 114 which sealingly abuts at one end 116 on an outer side of the hollow body 52 and sealingly abuts the housing 78 at the other end 118.
  • the cover 112 is formed so that the covering action for the relative pivotal position between the hollow body 52 and the tool head 14 is present.
  • the tool head 14 has a connection 120 for a fluid line 122.
  • This fluid line 122 is guided at least between the connection 120 and the holding rod 18 and in particular connected to the end 60 of the holding rod 18.
  • the connection 120 is formed, for example, on a tubular element 124, which sits firmly on the tool head 14.
  • the fluid line 122 is coupled to the retaining bar 18. It may also be provided that the fluid line 122 is performed by the holding rod 18 and by the second holding member 20 and is in fluidly effective connection with the vacuum cleaner port 36. In this case, when the second holding element 20 is displaced relative to the holding bar 18, the second holding element 20 is also displaced relative to the fluid line 122.
  • processing waste and in particular dust can be extracted from a processing area.
  • water can be conveyed to a processing area via the fluid line 122.
  • a cavity 126 of the first holding element 18 (which continues in the second holding element 20) comprises a plurality of chambers and, for example, a first chamber and comprises a second chamber.
  • processing residues can be sucked off via the first chamber and fluid can be supplied to the processing area via the second chamber.
  • the fluid line 122 is flexible, so that the pivoting of the tool head 14 is ensured on the holding device 12.
  • the tubular element 124 is arranged at a distance from the tool drive shaft 92.
  • the housing 78 in one embodiment has a region 128 with a cylindrical outer contour, this region extending parallel to the direction 74 rotationally symmetrical to an axis of symmetry 130 ( FIG. 4 ).
  • the axis of symmetry 130 is spaced parallel to the axis of rotation 94 of the tool drive shaft 92.
  • the region 128 with a cylindrical outer contour makes it possible to provide a pivot bearing for a correspondingly designed tool holding device 16 in order to enable its rotation on the tool head 14.
  • the housing 78 forms an inner shaft about which the tool holding device is rotatable to its orientation.
  • a securing device 132 may also be provided in order to lock the rotatability of the tool holding device 16 on the tool head 14, that is to enable the tool holding device 16 to be secured against rotation on the tool head 14.
  • the securing device 132 comprises one or more recesses 134 (FIG. FIG. 4 ), in each of which a locking pin of a tool holding device can engage as a blocking element.
  • the tool holding device 16 is an integral part of the tool head 14.
  • tool holding devices can be detachably connected as attachments with the tool head 14, wherein, for example, different tool holding devices can be provided depending on the application.
  • a first embodiment of a tool holding device according to the invention which in FIG. 5 shown there and designated as a whole by 136, has a housing 138 in which a shaft 140 is arranged.
  • the shaft 140 is rotatably guided in a first pivot bearing 142 and in a second spaced pivot bearing 144.
  • the pivot bearings 142, 144 are, for example, ball bearings.
  • An axis of rotation of the shaft 140 is coaxial with the axis of rotation 94 of the tool drive shaft 92.
  • the shaft 140 is rotatably coupled directly to the tool drive shaft 92.
  • the shaft 140 then rotates at the same speed as the tool drive shaft 92.
  • a tool plate 146 is rotatably connected to which a tool such as a grinding wheel can be fixed.
  • the housing 138 has an extension 148 in which the tool plate 146 is positioned.
  • a channel 150 is arranged, which is connectable to the tubular element 124 of the tool head 14. This channel 150 points into a fluid space 152 above the tool plate 146.
  • the fluid space 152 surrounds the tool plate 146 in an annular manner.
  • the extension 148 has an annular wall 154, wherein between the tool plate 146 and the wall 154, an annular space 156 is formed, which communicates with the fluid chamber 152 in fluidly effective connection. As a result, machining residues can be sucked through the channel 150.
  • the housing 138 has a hollow cylinder space 158 with which it can be placed on the area 128 of the tool head 14. An axial fixation of the tool holding device 136 on the tool head 14 can thereby take place.
  • the tool holding device 136 has one or more locking pins 159 as locking elements, which or which dive into the corresponding recess or recesses 134 when the tool holding device 136 is fixed to the tool head 14. As a result, the relative rotatability of the tool holding device 136 on the tool head 14 is blocked.
  • the grinding machine 10 with the tool holder 136 functions as follows:
  • the length of the holding device 12 (that is, the relative position of the second holding member 20 to the first holding member 19) set according to the application.
  • the drive motor 40 By actuating the switch 46, the drive motor 40 is activated. As a result, the motor shaft 42 is set in rotation. For example, a typical speed is on the order of 20,000 revolutions per minute.
  • this speed is reduced to, for example, 4 500 revolutions per minute or 6 000 revolutions per minute. With this speed, the rigid shaft 50 is driven.
  • the tool holding device 136 is formed in this embodiment as a detachable attachment and thus in particular as a replaceable attachment for the grinding machine 10.
  • Tool speeds of the order of magnitude of up to approximately 6,000 revolutions per minute or more can be achieved (depending on the reduction by the gear 48). This allows, for example, grinding concrete.
  • the tool holder 136 may be configured as a concrete grinder.
  • the speed of the drive motor 40 is adjustable;
  • the speed is electronically adjustable.
  • no mechanical transmission as the transmission 48 is necessary.
  • a housing 162 is provided, in which a tool plate 164 is rotatably mounted.
  • the housing 162 has an extension region 166 for this purpose.
  • the tool plate 164 is non-rotatably coupled to a shaft 168, which rotates about an axis of rotation 170.
  • the shaft 168 is mounted in a pivot bearing 172; This pivot bearing is in particular a ball bearing.
  • the axis of rotation 170 is spaced parallel to the axis of rotation 94 of the tool drive shaft 92.
  • the tool holder 160 has a stub shaft 174, which is rotatably mounted in a pivot bearing 176 with a rotation axis coaxial with the axis of rotation 94 of the tool drive shaft 92.
  • the stub shaft 174 is rotatably coupled to the tool drive shaft 92.
  • a gear 178 For coupling the stub shaft 174 to the shaft 168, a gear 178 is provided.
  • the gear 178 includes a gear 180 which is rotatably connected to the shaft 168.
  • the gear 180 is driven via the shaft stub 174 in a rotational movement to rotate the shaft 168.
  • the stub shaft 174 has gear teeth as a gear, in which the gear 180 engages.
  • the stub shaft 174 is a drive shaft and the shaft 168 is an output shaft.
  • a speed reduction is achieved; the speed of the tool drive shaft 92 can be reduced to achieve a reduced speed for certain applications. For example, a reduction by a factor of three. If the tool drive shaft 92 is driven, for example, with a number of revolutions of 4 500 revolutions per minute, then can be achieved by such a reduction, a speed of 1 500 revolutions per minute on the shaft 168 and thus for a tool.
  • the tool holding device 160 includes one or more locking pins 182, which can dive into the corresponding recess or recesses 134 of the tool head 14 in order to fix the tool holding device 136 in a rotationally fixed manner to the tool head 14.
  • the tool holder 160 includes, as described in connection with the tool holder 136, a hollow cylinder space 184, via which it can be placed on the tool head 14.
  • the tool holder 160 is designed, for example, as a cylindrical grinder attachment, wherein a rotational speed is provided (in dependence on the gear 178), which is smaller than the rotational speed of the rigid shaft 50 and the tool drive shaft 92.
  • the tool holder 160 functions as described above in connection with the tool holder 136.
  • a housing 188 which has a triangular outer contour 190.
  • the housing 188 has an extension portion 192 in which a tool plate 194 is disposed.
  • the extension portion 192 has a triangular shape having a first corner 196a, a second corner 196b, and a third corner 196c (not shown in the drawing).
  • the triangle is an equilateral triangle.
  • the housing 188 may have a bevel 198 or chamfer on an outside.
  • the housing 188 has a hollow cylinder space 200, via which it can be placed rotatably on the tool head 14.
  • the axis of symmetry 130 as the axis of rotation of the tool holder 186 pierces the center of gravity of the triangular structure 190.
  • the tool plate 194 is arranged and formed such that a tool 202 held by it is arranged outside of the housing 188.
  • a shaft 204 is rotatably guided, which is rotatably coupled to the tool drive shaft 92.
  • a first pivot bearing 206 and a spaced second pivot bearing 208 are provided.
  • the shaft 204 is formed as an eccentric shaft with an eccentric portion 210, that is with a portion having an axis 212 which is parallel spaced from the axis of rotation 94 of the tool drive shaft 92. About this eccentric portion 210, the shaft 204 is coupled to the tool plate 194. The eccentric region 210 is guided in a rotary bearing 214.
  • the rotational movement of the tool drive shaft 92 can be converted into an oscillating movement of the tool plate 194 and thus of the tool 202.
  • the tool plate 194 is held by elastic elements 216a, 216b, 216c on the housing 188.
  • the elastic elements 216a, 216b, 216c are, in particular, rubber blocks or rubber strips. In each case, an elastic element is assigned to a corner area of the triangular structure 190.
  • the tool plate 194 is "free" held on the housing 188 to allow an oscillatory movement.
  • the formation of the elastic members 216a, 216b, 216c determines the moving shape of the tool 202.
  • the triangular structure 190 of the housing 188 allows grinding at corner regions and edge regions.
  • the tool 202 also has a triangular structure to allow for grinding at corners.
  • the tool holder 186 is designed as an eccentric grinding attachment. It can be placed on the tool head 14 and rotated there. For example, a stop for blocking the free rotation is provided by 360 °. This allows alignment for corner areas or edge areas of an application.
  • Disposed in the housing 188 are one or more fluid spaces 218 which are in fluid communication with the tube member 124. This allows extraction of processing residues.
  • another eccentric device may be provided as an eccentric shaft 204.
  • a rigid shaft 226 is provided which, like the rigid shaft 50 described above, is coupled to the drive motor.
  • This rigid shaft 226 is guided in a hollow body 228.
  • On the rigid shaft 226 is rotatably connected to this a shaft member 230.
  • the shaft member 230 is rotatably supported via a bearing means 232 to the hollow body 228.
  • the bearing device 232 is formed for example via plain bearings or ball bearings.
  • the shaft member 230 is coupled to the rigid shaft 226 and may be considered part of the rigid shaft 226. It is for length compensation in a certain area relative to the rigid shaft 226 slidably.
  • the rigid shaft 226 has a recess 234 and the shaft element 230 has an immersion region 236, with which it is immersed in the recess 234.
  • the immersion region 236 and the recess 234 are designed such that, in the case of a non-rotatable coupling between the shaft element 230 and the rigid shaft 226, longitudinal displaceability in a direction parallel to a rotation axis 238 is possible. This flexibility is in FIG. 9 indicated by the double arrow 240.
  • a tool head 242 is pivotably mounted on a pivot bearing 244 about a pivot axis 246.
  • the pivot axis 246 is perpendicular to the axis of rotation 238 and is cut by this.
  • the tool head 242 has a tool drive shaft 248. This is rotatable about a rotation axis 250.
  • the rotation axis 250 also intersects the pivot axis 246.
  • the axis of rotation 238 of the rigid shaft and the axis of rotation 250 of the tool drive shaft 250 intersect in the pivot axis 246 of the tool head 242.
  • the rigid shaft 226 is coupled via the shaft member 230 to the tool drive shaft 248 via a hinge device 252.
  • the tool head 242 is otherwise configured as described above.
  • the hinge device 252 is designed as a universal joint pair or as a universal joint pair. It comprises a first joint element 254, which is pivotably coupled about a first pivot axis 256 to the shaft element 230 and thus to the rigid shaft 226.
  • the first pivot axis 256 is parallel to the pivot axis 246 of the tool head 242 and is perpendicular to the axis of rotation 238 of the rigid shaft 226.
  • first joint element 254 is mounted pivotably on a connecting element 260 about a third pivot axis 258.
  • the third pivot axis 258 is transverse to the first pivot axis 256 and to the axis of rotation 238.
  • the third pivot axis 258 is perpendicular to the first pivot axis 256.
  • the tool drive shaft 248 is coupled to the hinge assembly 252 via a second hinge member 262.
  • the second hinge element is pivotally mounted about a second pivot axis 264 on the tool drive shaft 248.
  • the second pivot axis 264 lies transversely to the axis of rotation 50 of the tool drive shaft 248.
  • the second pivot axis 264 is also mounted on the connecting element 260 about a fourth pivot axis 266.
  • the fourth pivot axis 266 is transverse to the axis of rotation 50. It is also transverse and in particular perpendicular to the second pivot axis 264th
  • the connecting member 260 connects the first joint member 254 and the second joint member 262 with each other and thus also connects the rigid shaft 226 and the tool drive shaft 248.
  • a three-piece propeller shaft is formed, which includes the rigid shaft 226, the connecting member 260 and the tool drive shaft 248. (In this context, the shaft member 230 is considered part of the rigid shaft 226.)
  • the first pivot axis 256 and the second pivot axis 264 are parallel to each other. Further, the third pivot axis 258 and the fourth pivot axis 266 are parallel to each other, in each pivotal position of the tool head 242.
  • the first pivot axis 256 and the third pivot axis 258 span a plane. Further, the second pivot axis 264 and the fourth pivot axis 266 span a plane. The pivot axis 246 of the pivot bearing 244 is located between these two levels, in each pivotal position of the tool head 242nd
  • the flexion angle ⁇ 1 between the hinge device 252 and the rigid shaft 226 and the flexure angle ⁇ 2 between the hinge device 252 and the tool drive shaft 248 is dependent on the pivotal position of the tool head 242.
  • the hinge device 252 is formed and the coupling to the rigid shaft 226 and To the tool drive shaft 248 takes place such that the bending angles ⁇ 1 and ⁇ 2 are in the same plane.
  • the points of intersection between the first pivot axis 256 and the third pivot axis 258 and the second pivot axis 264 and the fourth pivot axis 266 lie in the same plane.
  • the deflection angles ⁇ 1 and ⁇ 2 are at least approximately equal in magnitude. Angular differences smaller than 3 ° may be possible.
  • the hinge device 256 is made compact with the pair of hinge elements 254 and 262 and the connector 260 between them.
  • the connecting element 260 forms a middle shaft between the outer shafts 262 (rigid shaft) and 258 (tool drive shaft).
  • a W-arrangement is present, since the bending angle is in the same direction.
  • a holding device 270 comprises a first holding element 272, which is for example tubular.
  • a drive motor 274 is arranged, which sits in particular in a housing 276.
  • the hollow body 278 and the first holding element 272 are connected via a web 281, which in the vicinity of a tool head (in FIG. 10 not shown) sits.
  • a fluid line 284 which leads to the tool head is coupled to or guided by the first retaining element 272.
  • the first holding element 272 has correspondingly an inner cavity.
  • the first retaining element 272 has a connection 286 for a vacuum cleaner.
  • An outer end of the first holding member 272 also defines an outer end of the corresponding grinding machine.
  • a particular tubular second holding element 282 is guided displaceably.
  • a handle member 290 is fixedly arranged.
  • the distance of the handle member 290 to the housing 276 and to the terminal 286 is predetermined. This distance is adjustable.
  • a fixing device 292 is provided, via which the longitudinal position of the second holding element 282 can be fixed to the first holding element 272.
  • FIG. 10 For example, a position of the second retaining element 288 on the first retaining element 272 is shown, in which the grip element 290 bears against the housing 276.
  • the housing 276 has, for example, a recess 294 into which a holding base 296 for the grip element 290 can be inserted.
  • the second holding element 288 can be moved with the handle member 290 away from the housing 276 (in FIG. 9 indicated by the arrow 298).
  • a handle member 300 is fixedly arranged or formed.
  • This grip element is designed in particular as a bow-shaped handle.
  • the first holding element 272 is designed such that in every position of the second holding element 288 it is guided completely, that is to say over its entire length, on the first holding element 272. In the furthest withdrawn position (in FIG. 10 indicated by non-solid lines and provided with the reference numeral 302), the second holding element 288 has its greatest distance from the web 281.
  • a shaft member 304 rotatably mounted longitudinally displaceable.
  • this shaft element is immersed over an immersion region in a recess of the rigid shaft 280, the immersion region and the recess being formed in such a way that a longitudinal displacement parallel to a rotation axis of the rigid shaft 280 is enabled. This solution allows a length compensation to be achieved.
  • a hand-held grinding machine comprises a holding device for holding the grinding machine, a drive motor which is arranged on the holding device, a tool head, which is pivotable about at least one pivot axis relative to the holding device and has a driven via the drive motor tool drive shaft, and a Transmission device for transmitting torque from the drive motor to the tool drive shaft, wherein the transmission device comprises a rigid shaft which is coupled to the tool drive shaft via a transmission or a hinge device.
  • the rigid shaft serves as a drive shaft for the tool head.
  • the tool drive shaft is an output shaft of the transmission or the joint device.
  • the drive motor is arranged on the holding device, then results in a compact construction of the hand-held grinding machine. Furthermore, the rigid shaft can be easily guided between the drive motor and the tool head.
  • the transmission or the hinge device is arranged on a pivot bearing or in the vicinity of a pivot bearing for the tool head.
  • the tool head can be constructed in a simple and space-saving manner.
  • the tool head is pivotable relative to the rigid shaft.
  • a torque transmission can be ensured even at high speeds at each pivotal position of the tool head relative to the rigid shaft.
  • a rotation axis of the rigid shaft is perpendicular to a pivot axis of the tool head.
  • an axis of rotation intersect rigid shaft and an axis of rotation of the tool drive shaft in each position of the tool head in one point. This results in an optimized torque transmission from the rigid shaft to the tool drive shaft.
  • the point of intersection lies on a pivot axis of the tool head. This gives a space-saving training for the transmission or the joint device and for a corresponding pivot bearing for the pivoting of the tool head.
  • the transmission is designed as a gear transmission.
  • the torque transmission from the rigid shaft to the tool drive shaft via gears.
  • a gear for transmitting torque from the rigid shaft to the tool drive shaft, a gear is provided which is driven by the rigid shaft and which is coupled to the tool drive shaft.
  • a rotation axis of the gear is coaxial with a pivot axis of the tool head.
  • a space-saving and simple design of the hand-held grinding machine can be achieved if a rotation axis of the gear is coaxial with a pivot axis of the tool head.
  • the gear can be arranged on a pivot bearing for the pivotability of the tool head relative to the holding device.
  • the transmission is designed as a bevel gear.
  • a bevel gear is arranged on the rigid shaft.
  • a bevel gear is disposed on the tool drive shaft. Via the bevel gear of the rigid shaft can then drive a gear. This gear in turn drives the bevel gear of the tool drive shaft and thus the tool drive shaft.
  • the hinge means comprises a first hinge member pivotally coupled to the rigid shaft about a first pivot axis and a second hinge element pivotally coupled to the tool drive shaft about a second pivot axis
  • the rigid shaft is coupled to the tool drive shaft via a hinge device.
  • the torque of the rigid shaft is transmitted to the tool drive shaft, wherein the pivoting of the tool head is made possible.
  • a hinge device can be a - articulated - solid coupling between the tool drive shaft and the rigid shaft reach, which is independent of the pivotal position of the tool head.
  • the joint device comprises a first joint element, which is pivotably coupled to the rigid shaft about a first pivot axis, and a second joint element which is pivotally coupled to the tool drive shaft about a second pivot axis.
  • a uniform rotational speed between the drive side (the rigid shaft) and the output side (the tool drive shaft) can be achieved, whereby the pivotability of the tool head is ensured.
  • the joint device is designed as a combination of two universal joints (cardan joints), wherein the first joint element and the joint element form a universal joint pair.
  • the first pivot axis is oriented perpendicular to a rotation axis of the rigid shaft.
  • the second pivot axis is oriented perpendicular to a rotational axis of the tool drive shaft.
  • the first pivot axis and the second pivot axis are oriented parallel to each other. That's what makes it possible It is also possible for the deflection angle of the first joint element with respect to the rigid shaft and the bending angle of the tool drive shaft with respect to the second joint element to be at least approximately equal in magnitude. (Angular differences smaller than 50 ° and in particular smaller than 3 ° can be allowed.)
  • a rotation axis of the rigid shaft intersects the first pivot axis.
  • an axis of rotation of the tool drive shaft intersects the second pivot axis.
  • the first joint member is pivotable about a third pivot axis oriented transverse to the first pivot axis.
  • the second hinge member is pivotally mounted about a fourth pivot axis which is transverse to the second pivot axis.
  • the third pivot axis and the fourth pivot axis are oriented parallel to each other. As a result, an optimized power transmission can be achieved.
  • the first joint member is pivotably supported on a connecting member to the second joint member about the third pivot axis.
  • the hinge device can be formed in a simple manner when the first joint element is pivotally mounted on a connecting element to the second joint member about the third pivot axis. It can be compact and thus save space.
  • the connecting element is then part of a propeller shaft, which comprises the rigid shaft and the tool drive shaft.
  • the second hinge member is pivotally supported on a connecting member to the first hinge member about the fourth pivot axis. It can be compact and thus save space.
  • the connecting element is then part of a propeller shaft, which comprises the rigid shaft and the tool drive shaft.
  • the pivot axis of the tool head is between the plane defined by the first pivot axis and the third pivot axis and that through the first second pivot axis and the fourth pivot axis spanned plane.
  • an at least three-part propeller shaft is formed by means of the rigid shaft, the joint device, and the tool drive shaft.
  • an at least three-part propeller shaft by means of the rigid shaft, the joint device and there in particular a connecting element between the first joint element and the second joint element and the tool drive shaft is formed.
  • the bending angle between the rigid shaft and the first joint member and the flexing angle between the tool drive shaft and the second joint member are in one plane. This bending angle is dependent on the pivotal position of the tool head to the rigid shaft. If the bending angles lie in one plane, an optimized power transmission can be achieved at the same speed on the drive side and the driven side.
  • the bending angle between the rigid shaft and the first joint element and the bending angle between the tool drive shaft and the second joint element at least approximately equal in terms of magnitude. For the same reason, it is favorable if the bending angles between the rigid shaft and the first joint element and between the tool drive shaft and the second joint element are equal in magnitude.
  • the corresponding hinge device may be a Z-arrangement or W-arrangement of two universal joints. In that the angles between the outer shafts (the rigid shaft and the tool drive shaft) and the middle shaft (the connecting element between the first joint member and the second joint member) are the same, the rotational speeds on the drive side and the driven side are the same.
  • the hinge device is coupled to the rigid shaft via a shaft element which is longitudinally longitudinally displaceable on the rigid shaft.
  • a length compensation between the transmission or the joint device and the rigid shaft can be achieved.
  • the shaft element is guided longitudinally displaceable in or on the rigid shaft.
  • the hinge means is coupled to the tool drive shaft via a shaft member which is non-rotatably longitudinally slidable on the tool drive shaft.
  • a length compensation between the transmission or the joint device and the rigid shaft can be achieved.
  • the shaft element is guided longitudinally displaceable in or on the rigid shaft.
  • the shaft element is guided, for example, longitudinally displaceable in or on the tool drive shaft.
  • the rigid shaft is coupled to the drive motor via a shaft element which is longitudinally longitudinally displaceable on the rigid shaft. This allows a length compensation can be achieved, for example, to compensate for thermal expansion can.
  • the rigid shaft is guided to the tool head in a hollow body.
  • This hollow body is formed for example as a tube;
  • the tube is cylindrical.
  • the rigid shaft between pivot bearings can be free.
  • the rigid shaft does not come into contact with the walls of the hollow body.
  • the hollow body can also serve for the pivotable fixing of the tool head to the holding device.
  • the rigid shaft is guided between the drive motor and the tool head in the hollow body. It can be achieved in a simple manner, a defined "free" leadership of the rigid shaft between pivot bearings.
  • the tool head is pivotally supported on the hollow body via a pivot bearing.
  • the hollow body can be formed with such a mechanical stability that the tool head can be held on it (pivotable).
  • a cover is arranged between the tool head and the hollow body, which at least partially surrounds the gear or the joint device and / or a pivot bearing. Through the cover can cover an opening through which the hollow body and the tool head are pivotally connected to each other. Through the cover can be easily prevent the ingress of dust in the transmission and in a pivot bearing.
  • the cover comprises a collar.
  • the cuff is applied to the tool head and the hollow body. As a result, a good sealing effect can be achieved.
  • the cuff is designed, for example, as a bellows, in order to enable relative ease of pivoting between the hollow body and the tool head in a simple manner.
  • the tool head is pivotable about at least one pivot axis which is transverse to the axis of rotation of the tool drive shaft. This allows a user to guide the handheld grinder, for example, up a wall.
  • a tool holding device is rotatable about at least one axis of rotation which is substantially parallel to or coincides with the axis of rotation of the tool drive shaft.
  • the rotation may be one full turn or one turn less than 360 °.
  • Rotation can be a tool holder and thus align a tool; This is particularly advantageous if the tool is not rotationally symmetrical.
  • a tool holding device has a triangular outer contour in order to enable a grinding process at corners or edges.
  • the tool head for forming a pivot bearing for a tool holding device has an area with a cylindrical outer contour.
  • Such a rotatability can be achieved in a simple manner if the tool head has a region with a cylindrical outer contour for forming a pivot bearing for the tool holding device. This makes it possible to provide an inner shaft on which an outer shaft can be guided.
  • the tool head has a securing device for blocking the rotatability of a tool holding device on the tool head.
  • a securing device for blocking the rotatability of a tool holding device on the tool head.
  • the tool head is assigned a fixing device for fixing a tool holding device. It can basically be provided that the tool holding device is arranged integrally on the tool head. In particular, a shaft of the tool holding device is then formed by the tool drive shaft.
  • the tool holding device is detachably fixable. It can then be provided, for example, a basic unit with a drive motor, the rigid shaft and the tool head, wherein on the tool head various tool holding devices can be placed depending on the application.
  • the tool holder attachments may differ, for example, with regard to the rotational speed or else the type of drive (rotating or oscillating). You can also differ by which tool can be fixed to them.
  • the tool holding device has a shaft which is coupled to the tool drive shaft or can be coupled. It may in principle be a separate element, which is connectable to the tool drive shaft. It is also possible, when the tool holding device is integrally formed on the tool head, that this shaft and the tool drive shaft are integrally formed.
  • the Tool holding device to a transmission, via which the shaft is coupled to the tool drive shaft or can be coupled.
  • the gear can be used to set a specific movement type of a tool.
  • the tool drive shaft can be driven at high speeds due to a rigid shaft. If a certain high speed is provided by the drive motor, gear reduction may be required for some applications to drive a tool at a lower speed than the maximum speed provided.
  • the transmission is formed as a reduction gear.
  • the gear can be used to set a specific movement type of a tool.
  • the tool drive shaft can be driven at high speeds due to a rigid shaft. If a certain high speed is provided by the drive motor, gear reduction may be required for some applications to drive a tool at a lower speed than the maximum speed provided.
  • a shaft of the tool holding device has a rotation axis coaxial with the rotation axis of the tool drive shaft of the tool head.
  • a corresponding tool holding device can be formed with small transverse dimensions.
  • a corresponding tool holding device is suitable for concrete grinding, for example.
  • a shaft of the tool holding device has a rotation axis spaced parallel to the axis of rotation of the tool drive shaft of the tool head. This spacing can be achieved for example by the provision of a transmission.
  • a shaft of the tool holding device is formed as an eccentric shaft.
  • a tool can be driven in an oscillatory motion.
  • the tool holding device is rotatably fixable to the tool head about a rotation axis parallel to the rotation axis of the tool drive shaft. This is favorable, for example, when corner areas or edge areas are to be ground. An operator can then set up at a greater distance to such a corner area or edge area.
  • the tool holding device has one or more locking elements for blocking a rotatability of the tool holding device about an axis of rotation parallel to the axis of rotation of the tool drive shaft.
  • the tool holding device has a triangular outer contour, at least in a partial region. With such an outer contour, the tool holding device can be positioned in a simple manner on edge regions or corner regions. This results in an extended grinding area.
  • an axis of rotation for rotatability of the tool holder relative to the tool head at or near a center of gravity of a triangle of the triangular outer contour pierces the triangle.
  • the center of gravity is the geometric center of gravity.
  • a tool is driven in an oscillating manner by the tool holding device.
  • the corresponding tool holding device is in particular an eccentric grinder. Due to the oscillating driving otherwise difficult to access areas such as corner areas and edge areas can be processed for grinding operations by a cylindrical grinder.
  • the tool is driven eccentrically. It can be provided, for example, an eccentric shaft or another eccentric drive.
  • the tool is fixed to the tool holding device via elastic members.
  • an oscillation movement driven for example by an eccentric shaft, can be made possible in a simple manner.
  • elastic members are disposed at or near corners of the tool holding device.
  • elastic elements are located on or in the vicinity of corners of the tool holding device in order to be able to drive the tool in an oscillating manner.
  • the rigid shaft is coupled directly or via a gear to the drive motor.
  • the transmission is used for example for speed reduction. It is also possible that a transmission is provided for speed increase. But it is also possible in principle that the speed of the drive motor is adjustable and in particular is electronically adjustable.
  • a reduction gear is provided for coupling the drive motor to the rigid shaft.
  • rotational speeds of the order of 20,000 revolutions per minute can be reduced to speeds of the order of, for example, 4,000 to 6,000 revolutions per minute or more.
  • the transmission is disposed in the same housing as the drive motor. This results in a compact construction, so that the hand-held grinding machine in turn can be used for a user in a simple manner.
  • the tool head is coupled to a fluid line.
  • processing residues such as dust can be extracted.
  • a processing area for example, cooling liquid such as water is supplied.
  • the holding device has a holding bar. This has, for example, a circular outer contour. About such a holding rod, the grinding machine can be easily hold.
  • the holding bar is formed as a hollow body.
  • a cavity is provided, can be transported through the fluid.
  • a fluid line is arranged to be able to vacuum over a vacuum cleaner processing residues.
  • the support rod is formed as a fluid guide member or a fluid guide member is disposed on the support rod.
  • the holding rod then serves in addition to holding for a user as a "holder” for a fluid guide element or forms a fluid guide element itself.
  • a fluid line is connected to the holding bar, or a fluid line is guided on the holding bar and coupled to the tool head. This makes it easy to perform a machining residue extraction from a processing area.
  • the tool head and / or a tool holding device has one or more fluid spaces which are in fluid-effective connection with a fluid line.
  • a grinding machine comprising a holding device for holding the grinding machine, a drive motor arranged on the holding device, a tool head which is pivotable about at least one pivot axis relative to the holding device and has a tool drive shaft driven via the drive motor, and a transfer device for torque transmission from the drive motor to the tool drive shaft, or in a grinding machine according to one of the preceding embodiments, the length of the holding device relative to the tool head is adjustable.
  • a user can adapt the length of the holding device to the application. This results in improved applications and in particular the handling is improved.
  • the length is steplessly adjustable.
  • the holding means comprises a first holding member and a second holding member which are slidably lockable relative to each other.
  • the holding elements can also be rotatable relative to each other.
  • the second holding member is slidably guided in the first holding member.
  • the holding elements are formed, for example, as tubes, wherein the second holding element is guided in the first holding element.
  • the determination of the second holding element on the first holding element can be achieved in a simple manner, for example by a screw-clamp connection.
  • the second holding member is slidable on the first holding member.
  • the first holding element is, for example, a stationary element which protrudes, for example, over a housing of the drive motor.
  • the first holding element is designed such that in each displacement position, the second holding element lies completely on the first holding element. As a result, a stable holding device is provided for each position of the second holding element.
  • an outer end of the holding device is formed by the first holding member.
  • a handle member is disposed on the second holding member.
  • a grip element is arranged on the second holding element.
  • the gripping element can be held, for example, with the right hand, and the second holding element or the first holding element can be grasped with the left hand.
  • the holding elements are correspondingly designed in their outer contour so that they can be gripped ergonomically.
  • the handle member has a holder for an electric wire.
  • the electric cable can be fixed in order to guide this defined on the grinding machine.
  • the first holding member or the second holding member or a fluid conduit comprises a vacuum cleaner port. It is favorable if the first holding element or the second holding element or a fluid line (which is guided in the first or second holding element) has a vacuum cleaner connection. As a result, a negative pressure can be generated in a simple manner on a processing area in order to be able to vacuum out processing residues.
  • a tool holding device for a hand-held grinding machine, comprising a holding device for holding the grinding machine, a drive motor which is arranged on the holding device, a tool head, which is pivotable about at least one pivot axis relative to the holding device and has a driven via the drive motor tool drive shaft and a transmission device for transmitting torque from the drive motor to the tool drive shaft, or for a grinding machine according to one of the preceding embodiments
  • the tool holding device comprises a fixing device for releasably fixing the tool holder on a tool head and a shaft for driving a held by the tool holder tool, which is connected to a tool drive shaft the tool head can be coupled.
  • This tool holder can be used in a simple manner.
  • a grinding machine with a tool head is a basic unit to which the tool holder can be releasably fixed as an attachment.
  • a basic unit with a uniform number of revolutions can then be provided, wherein a defined speed can be set by means of a gear in the tool-holding device.
  • a concrete grinder attachment can be provided on which a high speed grinding tool is driven.
  • the tool holding device has a gear, via which the shaft is coupled to the tool drive shaft or can be coupled.
  • the transmission is designed as a reduction gear.
  • the shaft has a rotation axis coaxial to the axis of rotation of the tool drive shaft of the tool head.
  • the shaft of the tool holding device has a rotation axis spaced parallel to the axis of rotation of the tool drive shaft of the tool head.
  • the shaft is designed as an eccentric shaft.
  • the tool holding device is rotatable about an axis of rotation parallel to the axis of rotation of the tool drive shaft rotatably fixed to the tool head.
  • the tool holding device one or more locking elements for blocking a rotatability of the tool holding device about an axis of rotation parallel to the axis of rotation of the tool drive shaft.
  • the tool holding device has a triangular outer contour, at least in a partial region.
  • an axis of rotation for rotatability of the tool holding device relative to the tool head at or near a center of gravity of a triangle of the triangular outer contour pierces the triangle.
  • a tool on the tool holding device is arranged to oscillate drivable.
  • the tool is driven eccentrically.
  • the tool is fixed to the tool holding device via elastic elements.
  • elastic members are arranged at or near corners of the tool holder.
  • one or more fluid spaces are provided which are in fluid communication with a fluid line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP09150029A 2005-05-02 2006-04-29 Ponçeuse portable et dispositif porte-outil Not-in-force EP2033738B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510021153 DE102005021153A1 (de) 2005-05-02 2005-05-02 Handgehaltene Schleifmaschine und Werkzeughalteeinrichtung
EP20060008991 EP1719581B1 (fr) 2005-05-02 2006-04-29 Ponçeuse motorisée à tête pivotable et porte-outil

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP06008991.9 Division 2006-04-29
EP20060008991 Division EP1719581B1 (fr) 2005-05-02 2006-04-29 Ponçeuse motorisée à tête pivotable et porte-outil

Publications (3)

Publication Number Publication Date
EP2033738A2 true EP2033738A2 (fr) 2009-03-11
EP2033738A3 EP2033738A3 (fr) 2009-08-12
EP2033738B1 EP2033738B1 (fr) 2012-07-04

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Application Number Title Priority Date Filing Date
EP09150029A Not-in-force EP2033738B1 (fr) 2005-05-02 2006-04-29 Ponçeuse portable et dispositif porte-outil
EP20060008991 Not-in-force EP1719581B1 (fr) 2005-05-02 2006-04-29 Ponçeuse motorisée à tête pivotable et porte-outil

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Application Number Title Priority Date Filing Date
EP20060008991 Not-in-force EP1719581B1 (fr) 2005-05-02 2006-04-29 Ponçeuse motorisée à tête pivotable et porte-outil

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EP (2) EP2033738B1 (fr)
DE (1) DE102005021153A1 (fr)
DK (1) DK1719581T3 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US9956676B2 (en) 2013-01-09 2018-05-01 Techtronic Power Tools Technology Limited Tool with rotatable head
WO2019219780A1 (fr) * 2018-05-16 2019-11-21 Festool Gmbh Système de traitement de surface
WO2019219782A1 (fr) * 2018-05-16 2019-11-21 Festool Gmbh Machine-outil mobile à outil de travail disposé de manière à pouvoir se déplacer
EP3812090A2 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3812091A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3812089A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3812092A2 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3812093A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse polaire
EP3838480A2 (fr) 2019-10-23 2021-06-23 Black & Decker Inc. Ponceuse à manche
EP3858543A2 (fr) 2019-10-23 2021-08-04 Black & Decker Inc. Ponceuse à manche
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

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DE102012111989A1 (de) 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Handgehaltene Schleifmaschine
DE102012111985A1 (de) 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Handgehaltene Schleifmaschine
USD748963S1 (en) 2013-07-05 2016-02-09 Flex-Elektrowerkzeuge Gmbh Grinding machine
DE102013114469A1 (de) 2013-12-19 2015-06-25 Flex-Elektrowerkzeuge Gmbh Handgehaltene Schleifmaschine
DE102014103019A1 (de) 2014-03-06 2015-09-10 Flex-Elektrowerkzeuge Gmbh Werkzeugkopf für eine handgehaltene Schleifmaschine und handgehaltene Schleifmaschine
CN103991015B (zh) * 2014-05-29 2016-09-28 傅月华 墙面打磨机
DE102014111250A1 (de) 2014-06-13 2015-12-17 Metabowerke Gmbh Langhalsschleifer sowie Beleuchtungseinheit dafür
CN104802050A (zh) * 2015-04-08 2015-07-29 江苏江鸿建设工程有限公司 一种多功能地面打磨抛光机
JP1629184S (fr) 2018-10-03 2019-10-07
CN113089563A (zh) * 2021-04-08 2021-07-09 华东交通大学 一种铁路道岔清洁养护装置及方法

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Cited By (20)

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Publication number Priority date Publication date Assignee Title
US9956676B2 (en) 2013-01-09 2018-05-01 Techtronic Power Tools Technology Limited Tool with rotatable head
CN105307816A (zh) * 2013-07-05 2016-02-03 弗莱克斯电动工具责任有限公司 手持式研磨机
WO2019219780A1 (fr) * 2018-05-16 2019-11-21 Festool Gmbh Système de traitement de surface
WO2019219782A1 (fr) * 2018-05-16 2019-11-21 Festool Gmbh Machine-outil mobile à outil de travail disposé de manière à pouvoir se déplacer
US20210205945A1 (en) * 2018-05-16 2021-07-08 Festool Gmbh Mobile machine tool with movably mounted tool
EP3812091A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3858543A3 (fr) * 2019-10-23 2021-08-25 Black & Decker Inc. Ponceuse à manche
EP3812092A2 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3812093A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse polaire
EP3838480A2 (fr) 2019-10-23 2021-06-23 Black & Decker Inc. Ponceuse à manche
EP3812090A2 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP3858543A2 (fr) 2019-10-23 2021-08-04 Black & Decker Inc. Ponceuse à manche
EP3812089A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
EP4063068A1 (fr) 2019-10-23 2022-09-28 Black & Decker, Inc. Ponceuse à manche
EP4289552A1 (fr) 2019-10-23 2023-12-13 Black & Decker, Inc. Ponceuse à bâton
US12005547B2 (en) 2019-10-23 2024-06-11 Black & Decker Inc. Pole sander
US11919127B2 (en) 2019-10-23 2024-03-05 Black & Decker Inc. Pole sander
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11951585B2 (en) 2019-10-23 2024-04-09 Black & Decker Inc. Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

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EP2033738B1 (fr) 2012-07-04
EP2033738A3 (fr) 2009-08-12
EP1719581B1 (fr) 2013-03-13
DE102005021153A1 (de) 2006-11-09
EP1719581A1 (fr) 2006-11-08
DK1719581T3 (da) 2013-06-17

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