EP4134203A1 - Dispositif de machine-outil portative, ainsi que machine-outil portative dotée d'un dispositif de machine-outil portative - Google Patents

Dispositif de machine-outil portative, ainsi que machine-outil portative dotée d'un dispositif de machine-outil portative Download PDF

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Publication number
EP4134203A1
EP4134203A1 EP22186402.8A EP22186402A EP4134203A1 EP 4134203 A1 EP4134203 A1 EP 4134203A1 EP 22186402 A EP22186402 A EP 22186402A EP 4134203 A1 EP4134203 A1 EP 4134203A1
Authority
EP
European Patent Office
Prior art keywords
bevel gear
output shaft
housing
rotation
axis
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
EP22186402.8A
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German (de)
English (en)
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EP4134203B1 (fr
Inventor
Eberhard Berhalter
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Individual
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Individual
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Publication of EP4134203A1 publication Critical patent/EP4134203A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the invention relates to a hand-held power tool device according to the preamble of claim 1.
  • At least one gear unit which comprises at least one bevel gear and at least one countershaft and/or attachment gear
  • the bevel gear having at least one bevel gear input shaft comprising a rotation axis, a bevel gear output shaft comprising a rotation axis and a bevel gear housing supporting the bevel gear input shaft and the bevel gear output shaft.
  • the countershaft transmission and/or front-end transmission has at least one output shaft that encompasses an axis of rotation.
  • a hand-held power tool device with at least one gear unit, which comprises at least one bevel gear is already known, the bevel gear having at least one bevel gear input shaft comprising a rotation axis, a bevel gear output shaft comprising a rotation axis and a bevel gear housing supporting the bevel gear input shaft and the bevel gear output shaft.
  • the object of the invention is in particular to provide a generic handheld power tool device or a handheld power tool with a generic handheld power tool device with a high level of convenience and utility for an operator.
  • the object is achieved according to the invention by the features of claim 1 and claim 6, while advantageous refinements and developments of the invention can be found in the dependent claims.
  • the invention is based on a hand-held power tool device with at least one gear unit, which comprises at least one bevel gear and at least one countershaft gear and/or attachment gear, the bevel gear being at least one bevel gear input shaft comprising a rotation axis, a bevel gear output shaft comprising a rotation axis, and a bevel gear input shaft and bevel gear output shaft supporting the bevel gear Has bevel gear housing, and wherein the countershaft and / or front-end gear has at least one output shaft comprising an axis of rotation.
  • the output shaft viewed in a direction directed away from the bevel gear housing and running at least essentially parallel to the axis of rotation of the bevel gear input shaft, is arranged after the bevel gear output shaft, with the countershaft transmission and/or front-end gear having a housing for supporting the output shaft , which is rotatably mounted on the bevel gear housing.
  • the axis of rotation of the output shaft is viewed along that of the angular gear housing directed away and at least substantially parallel to the axis of rotation of the bevel gear input shaft direction, offset to the axis of rotation of the bevel gear output shaft arranged.
  • the output shaft is preferably arranged for the most part, in particular completely, in a front area of the bevel gear housing, with the front area of the bevel gear housing, viewed along the direction pointing away from the bevel gear housing and running at least essentially parallel to the axis of rotation of the bevel gear input shaft, between the bevel gear output shaft and a front housing edge of the angle gear housing extends.
  • the front housing edge of the bevel gear housing is preferably arranged on a side of the bevel gear housing that faces away from a connection interface of the bevel gear housing.
  • the connection interface of the bevel gear housing is preferably provided for a connection of the bevel gear housing to a motor housing of a hand power tool comprising the hand power tool device.
  • connection interface of the angle gear housing preferably has a design that is already known to a person skilled in the art, in particular a design that is already known to a person skilled in the art from commercially available angle grinders.
  • the bevel gear is preferably designed as a bevel gear or as a crown gear.
  • the bevel gear preferably has an axis angle of 90°.
  • the bevel gear can be designed with spur gearing, helical gearing or helical gearing with axial offset.
  • the bevel gear input shaft can be designed in one piece with a drive shaft of a drive unit, in particular a rotor shaft of an electric motor of the drive unit, of the hand-held power tool comprising the hand-held power tool device.
  • the bevel gear input shaft can be formed by the drive shaft of the drive unit, in particular the rotor shaft of the electric motor.
  • the bevel gear input shaft is designed separately from the drive shaft and can be connected to the drive shaft in a rotationally fixed manner, in particular is connected, by means of a clutch or another connection that is designed to transmit torque and that appears sensible to a person skilled in the art.
  • the axis of rotation of the bevel gear input shaft preferably runs at least substantially parallel, in particular coaxially, to an axis of rotation of the drive shaft of the drive unit, in particular the rotor shaft of the electric motor.
  • substantially parallel is to be understood here in particular as an alignment of a direction relative to a reference direction, in particular in a plane, with the direction relative to the reference direction deviating in particular by less than 8°, advantageously less than 5° and particularly advantageously less than 2°.
  • a gear wheel, in particular a pinion, of the angle gear is preferably arranged in a rotationally fixed manner on the angle gear input shaft.
  • Another gear wheel, in particular a ring gear or a crown wheel, of the angle gear is preferably arranged in a rotationally fixed manner on the angle gear output shaft, in particular on an end region of the angle gear output shaft facing the angle gear input shaft.
  • the gear wheel preferably engages in the further gear wheel, in particular for the transmission of a driving force and/or a driving torque.
  • the axis of rotation of the bevel gear input shaft and the axis of rotation of the bevel gear output shaft preferably enclose an angle of 90°.
  • the axis of rotation of the bevel gear input shaft and the axis of rotation of the bevel gear output shaft enclose an angle different from 90°, in particular depending on the design of the bevel gear, the handheld power tool and/or their field of application.
  • the bevel gear input shaft and the bevel gear output shaft are rotatably mounted in the bevel gear housing in a manner already known to a person skilled in the art by means of bearing elements, in particular by means of roller bearings and/or plain bearings of the bevel gear.
  • the bevel gear output shaft preferably extends into a housing of the countershaft and/or auxiliary gear, in particular with an end of the bevel gear output shaft facing away from the other gear wheel.
  • An additional gear wheel, in particular a spur gear, of the angle gear is preferably arranged in a rotationally fixed manner on the angle gear output shaft, in particular on the end of the angle gear output shaft facing away from the further gear wheel.
  • a bearing element, in particular a ball bearing, of the bevel gear is preferably arranged on, in particular in, the housing of the countershaft and/or front-mounted gear to rotatably support the bevel gear output shaft.
  • Another additional gear wheel, in particular a spur gear, of the countershaft and/or front-mounted gear unit is preferably arranged in a rotationally fixed manner on the output shaft, in particular on an end of the output shaft facing the bevel gear output shaft.
  • the additional gear meshes with the further additional gear.
  • the countershaft transmission and/or front-end transmission has at least one intermediate gear, which is arranged between the additional gear and the further additional gear and meshes with the additional gear and the further additional gear, in particular in at least one direction of rotation of the output shaft to adapt to a direction of rotation of the bevel gear output shaft, in particular such that the output shaft and the bevel gear output shaft have a matching direction of rotation.
  • a direction of rotation of the output shaft can be switched, in particular by means of a switching unit of the countershaft and/or additional transmission, which is arranged in the housing of the countershaft and/or additional transmission and in particular in addition to a drive unit switching unit for reversing the direction of rotation the drive unit of the handheld power tool is provided.
  • the switching unit can have a configuration already known to a person skilled in the art and can be provided for switching as a result of an axial movement or as a result of a pivoting movement of at least one part of the transmission unit.
  • the axis of rotation of the output shaft preferably runs at least substantially parallel to the axis of rotation of the bevel gear output shaft.
  • the axis of rotation of the output shaft preferably runs transversely, in particular at least substantially perpendicularly, to the axis of rotation of the bevel gear input shaft.
  • the expression "essentially perpendicular" is intended here to define in particular an alignment of a direction relative to a reference direction, with the direction and the reference direction, viewed in particular in a projection plane, enclosing an angle of 90° and the angle has a maximum deviation of, in particular, less than 8 °, advantageously less than 5° and particularly advantageously less than 2°.
  • At least one fastening interface is preferably arranged on the output shaft for axial securing and/or for a non-rotatable connection of an insert tool, in particular a saw blade that can be driven in rotation, on the output shaft.
  • a high comfort and benefit factor can advantageously be achieved for an operator.
  • An essentially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used for machining a workpiece, in particular since the insert tool can be immersed into a workpiece essentially up to the output shaft.
  • a bevel gear housing, in particular a front housing edge of the bevel gear housing, of the already known hand-held power tool devices usually comes into contact with the workpiece, so that with already known hand-held power tool devices in comparison to the hand-held power tool devices according to the invention Hand machine tool device with the same diameter of a tool insert a lower maximum depth of cut can be achieved.
  • the hand-held power tool comprising the hand-held power tool device is configured as a window milling machine or as an assembly milling machine, a high level of comfort and utility can advantageously be achieved for an operator, since a deep cut can be made in a workpiece in one operation, for example to cut a window out of a reveal in a particularly convenient manner to separate or the like.
  • the output shaft be arranged in an area, in particular in an area of the bevel gear housing, which, viewed along the direction pointing away from the bevel gear housing and running at least essentially parallel to the axis of rotation of the bevel gear input shaft, is arranged after a plane of rotation of the bevel gear output shaft is, which extends at least substantially perpendicular to the axis of rotation of the bevel gear input shaft and in which the axis of rotation of the bevel gear output shaft runs.
  • the plane of rotation of the bevel gear output shaft is preferably a plane in which the axis of rotation of the bevel gear output shaft extends.
  • the output shaft is preferably arranged within a vicinity of the front housing edge of the angle gear housing.
  • the area close to the front housing edge of the bevel gear housing extends in particular from the front housing edge of the bevel gear housing up to a maximum of 30 mm or a maximum of up to 40% of a maximum longitudinal extent of the bevel gear housing in the direction of the bevel gear housing.
  • an essentially maximum cutting depth of an insert tool arranged on the output shaft can be used for machining a workpiece can be used, in particular since immersing the application tool into a workpiece can advantageously be reached almost up to the output shaft or up to the output shaft.
  • the countershaft and/or front-end transmission has a housing, in particular the housing already mentioned above, for mounting the output shaft, which is rotatably mounted on the bevel gear housing.
  • An axis of rotation of the housing preferably runs coaxially to the axis of rotation of the bevel gear output shaft.
  • the housing is preferably rotatably mounted on the bevel gear housing via a rotary bearing, such as a slewing ring or the like.
  • the output shaft is preferably arranged in the housing in such a way that at least the axis of rotation of the output shaft intersects the bevel gear housing, in particular in any rotational position of the housing relative to the bevel gear housing.
  • the output shaft, in particular the axis of rotation of the output shaft is preferably movable on a circular path about the axis of rotation of the angle gear output shaft as a result of a rotatable mounting of the housing relative to the angle gear housing.
  • the axis of rotation of the output shaft is preferably arranged eccentrically to the axis of rotation of the housing.
  • a position of the output shaft relative to the bevel gear housing can advantageously be varied in order to enable advantageous adaptability to different areas of use.
  • An essentially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used for machining a workpiece, in particular since the insert tool can advantageously be immersed in a workpiece almost up to the output shaft or up to the output shaft.
  • the axis of rotation of the bevel gear input shaft and the axis of rotation of the output shaft span a common plane, which, in particular in at least one rotational position of the housing of the countershaft and/or front-on-gear transmission relative to the bevel gear housing, is transverse, in particular at least essentially perpendicular, to the plane of rotation extends.
  • the common plane preferably extends in further rotational positions of the housing of the countershaft and/or front-mounted gear unit relative to the bevel gear housing transversely to the plane of rotation.
  • the housing and the bevel gear housing are immovably connected to one another in at least one exemplary embodiment of the hand-held power tool device and the common plane always extends at least essentially perpendicularly to the plane of rotation.
  • a high comfort and benefit factor can advantageously be achieved for an operator.
  • an arrangement of the output shaft that tends toward the front can be achieved.
  • the output shaft can advantageously be aligned in a line with the bevel gear input shaft and the bevel gear output shaft, in particular to enable comfortable handling of the hand power tool comprising the hand power tool device.
  • An essentially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used for machining a workpiece, in particular since the insert tool can advantageously be immersed in a workpiece almost up to the output shaft or up to the output shaft.
  • the hand-held power tool device comprises a positioning unit, with the countershaft and/or front-mounted gear unit having a housing, in particular the one already mentioned above, for supporting the output shaft, which is rotatably mounted on the bevel gear housing, with a rotational position of the housing relative to the Angular gear housing can be fixed by means of the positioning unit, in particular continuously or in stages.
  • the positioning unit is intended to fix rotational positions of the housing relative to the bevel gear housing by means of a positive and/or non-positive connection.
  • at least one spring-loaded latching element, in particular a latching lever, of the positioning unit is arranged on the bevel gear housing, in particular movably mounted thereon.
  • One or more latching recesses of the positioning unit is/are preferably arranged on the housing and is/are intended to interact with the latching element.
  • the latching element is arranged on the housing and the latching recess/s are arranged on the bevel gear housing.
  • the positioning unit can alternatively or additionally fix rotational positions of the housing relative to the bevel gear housing by means of frictional locking elements or the like.
  • Reliable use of a substantially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used in all rotational positions for machining a workpiece, in particular since the insert tool can advantageously be immersed into a workpiece almost up to the output shaft or up to the output shaft .
  • the countershaft and/or front-end transmission has a housing, in particular the one already mentioned above, for supporting the output shaft, which, in particular in at least one rotational position of the housing relative to the bevel gear housing, along the at least essentially parallel to the axis of rotation of the Angle gear input shaft running direction on the angle gear housing survives.
  • a maximum overhang of the housing along the direction running at least essentially parallel to the axis of rotation of the angular gear input shaft is preferably less than 20 mm or less than 25% of the maximum longitudinal extent of the bevel gear housing, preferably less than 15 mm or less than 20% of the maximum longitudinal extent of the bevel gear housing.
  • the output shaft is preferably arranged at least partially in the area of the housing which, in particular in at least one rotational position of the housing relative to the bevel gear housing, protrudes beyond the bevel gear housing along the direction running at least substantially parallel to the axis of rotation of the bevel gear input shaft.
  • Reliable use of a substantially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used in all rotational positions for machining a workpiece, in particular since the insert tool can advantageously be immersed into a workpiece almost up to the output shaft or up to the output shaft .
  • a hand-held power tool in particular the one already mentioned above, in particular a window milling machine or an assembly milling machine, with a hand-held power tool device according to the invention is proposed.
  • a "handheld power tool” is to be understood here in particular as a machine for processing workpieces, which can be transported by an operator without a transport machine.
  • the hand-held power tool has a maximum mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 5 kg.
  • the hand-held power tool preferably includes a motor housing, in particular the aforementioned motor housing.
  • the motor housing is preferably provided for accommodating and supporting a drive unit, in particular the drive unit already mentioned above, in particular at least the electric motor and/or an electronic unit of the drive unit, of the hand-held power tool.
  • the motor housing is preferably designed in one piece with a handle of the hand-held power tool. It is also conceivable that the motor housing is designed separately from the handle and the handle is arranged, in particular fixed, by means of a positive and/or non-positive connection on the motor housing, in particular on a side of the motor housing facing away from the bevel gear housing.
  • the hand-held power tool can be designed as a battery-powered hand-held power tool or as a corded hand-held power tool.
  • an essentially maximum cutting depth of an insert tool arranged on the output shaft can advantageously be used for machining a workpiece, in particular since the insert tool can be immersed into a workpiece essentially up to the output shaft.
  • the angle gear housing of the already known handheld power tool in comparison to the handheld power tool according to the invention, when the insert tool dips into a workpiece, the angle gear housing of the already known handheld power tool usually comes into contact with the workpiece, so that in already known handheld power tools compared to the handheld power tool according to the invention, with an inserted tool of the same diameter, a lower maximum cutting depth is reachable.
  • the hand-held power tool when the hand-held power tool is designed as a window milling machine or as an assembly milling machine, a high level of comfort and utility can be achieved for an operator, since a deep cut can be made in a workpiece in one operation, for example in order to particularly easily cut a window out of a reveal or similar. like
  • the hand-held power tool comprises at least one protective hood device, which is movably mounted on the transmission unit, in particular on a housing of the countershaft transmission and/or auxiliary transmission, the output shaft being in at least one position of the protective hood device relative to the transmission unit, such as on the Protective hood device is arranged that the axis of rotation of the output shaft has a maximum distance from a workpiece contact surface of the protective hood device, which is smaller is than 28mm.
  • the output shaft is preferably arranged on the protective hood device in at least one position of the protective hood device relative to the gear unit in such a way that the axis of rotation of the output shaft has a maximum distance from a workpiece contact surface of the protective hood device which is less than 25 mm and preferably less than 23 mm.
  • a position in which the axis of rotation of the output shaft has a maximum distance from a workpiece contact surface of the protective hood device that is less than 28 mm can be a fixed position of the gear unit relative to the protective hood device or it can be a position in which the gear unit is due to a movable Storage of the protective hood device on the transmission unit is movable.
  • the maximum distance between the axis of rotation of the output shaft relative to the workpiece contact surface preferably extends in the at least one position of the protective hood device relative to the gear unit along a direction running at least substantially perpendicular to the axis of rotation of the output shaft, in particular to the plane of rotation of the bevel gear output shaft.
  • the workpiece contact surface of the protective hood device preferably delimits an insertion tool passage opening of the protective hood device, through which an insert tool can extend when the insert tool is arranged on the output shaft, in particular along the direction running at least essentially perpendicularly to the axis of rotation of the output shaft, in particular to the plane of rotation of the bevel gear output shaft.
  • the protective hood device is preferably provided for accommodating insert tools with a maximum external diameter of more than 180 mm, preferably more than 200 mm and very particularly preferably more than 210 mm.
  • a high comfort and benefit factor can advantageously be achieved for an operator.
  • An essentially maximum cutting depth of an insert tool arranged on the output shaft, which is at least partially surrounded by the protective hood device, can advantageously be used for machining a workpiece, in particular since there is a maximum distance between the axis of rotation of the output shaft to the workpiece contact surface of the protective hood device can be kept small.
  • the hand-held power tool comprises a protective hood device, in particular the one already mentioned above, which is movably mounted on the gear unit, in particular on a housing of the countershaft transmission and/or front-end transmission, the protective hood device having at least one guide unit, in particular a guide carriage, for a translationally movable mounting of the protective hood device relative to the gear unit, in particular relative to the bevel gear, wherein at least the bevel gear housing is rotatably mounted relative to the protective hood device.
  • the guide unit is preferably provided for the purpose of mounting the protective hood device on the gear unit so that it can move in a translatory manner.
  • the guide unit preferably comprises at least one guide element, in particular a guide carriage element, which is fixed to the protective hood device, in particular to a base body element of the protective hood device.
  • the guide unit comprises at least one further guide element, in particular a further guide carriage element, which is movably mounted on the guide element, in particular movably mounted in a translatory manner.
  • the additional guide element is preferably fixed to the transmission unit, in particular to the housing of the countershaft and/or front-end transmission.
  • the guide unit is preferably designed as a guide carriage. It is conceivable that the guide unit includes roller bearing elements or sliding bearing elements in order to realize a translational, movable mounting of the guide element and the further guide element relative to one another.
  • the guide element and the further guide element are supported in a translatory, movable manner relative to one another according to a guide rail principle or a guide rod principle, as is already known to those skilled in the art, for example in DE 10 2014 102 859 A1 or the DE 10 2016 109 049 A1 shown and/or described.
  • the insert tool can be moved in a state arranged on the output shaft, preferably at least partially through the insert tool feed-through opening out of a receiving space of the protective hood device, in particular to enable workpieces to be machined in a manner already known to a person skilled in the art.
  • a high comfort and benefit factor can advantageously be achieved for an operator.
  • flexible positions of the output shaft relative to the protective hood device can be made possible, in particular with a simultaneous rotatable mounting of the housing of the countershaft transmission and/or front-end transmission relative to the bevel gear housing.
  • An advantageous adaptability to different areas of application of the handheld power tool can be made possible.
  • the hand-held power tool includes a protective hood device, in particular the one already mentioned above, which has a base body element, in particular the one already mentioned above, and at least one cover element which is movably mounted on the base body element and which together delimit a receiving space of the protective hood device for an insert tool.
  • the base body element and the cover element are formed from sheet steel, in particular with a maximum material thickness of less than 2 mm. It is conceivable that the hand-held power tool for solving the above-mentioned task is designed independently of the countershaft and/or front-end transmission in an alternative embodiment.
  • the handheld power tool in the alternative configuration in particular independently of the countershaft gear and/or auxiliary gear, comprises at least one handheld power tool device that has at least one gear unit that includes at least one bevel gear, with the bevel gear having at least one bevel gear input shaft that includes a rotation axis, a one has a bevel gear output shaft comprising a rotation axis and a bevel gear housing supporting the bevel gear input shaft and the bevel gear output shaft, and at least one protective hood device, which is movably mounted on the gear unit, in particular on the bevel gear housing, the protective hood device having a base body element and at least one cover element movably mounted on the base body element, which together delimit a receiving space of the protective hood device for an insert tool, the base body element and the cover element being made of sheet steel , In particular with a maximum material thickness of less than 2 mm are formed.
  • the base body element and the cover element are preferably formed from sheet steel, in particular with a maximum material thickness of less than 1.5 mm and particularly preferably less than 1.1 mm.
  • the base body element and the cover element are formed from sheet steel with a tensile strength of more than 1000 N/mm 2 , preferably more than 1200 N/mm 2 and very particularly preferably more than 1300 N/mm 2 .
  • the body member and the cover member are formed from sheet steel sold under the trade name Docol® .
  • Docol® trade name
  • the base body element and the cover element are formed from a different material which appears sensible to a person skilled in the art and which has essentially similar material properties to the material marketed under the trade name Docol® .
  • At least the base body element preferably comprises one or more stiffening ribs on an inner side of the base body element.
  • the stiffening rib(s) is/are preferably formed from the same material as the base body element.
  • the stiffening rib(s) is/are preferably formed in one piece with the base body element by means of a welding process, in particular a laser welding process.
  • the base body element comprises one or more bead(s) on an inner side of the base body element as an alternative or in addition to the stiffening rib(s).
  • the base body element alternatively or in addition to the stiffening rib(s) and/or the bead(s) on the inside of the base body element comprises one or more bead(s) and/or stiffening rib(s) on an outside of the base body element.
  • the protective hood device comprises a suction nozzle on which a suction device, such as a vacuum cleaner or the like can be connected, in particular in order to suck off any material removed during machining of a workpiece by means of the insert tool arranged on the output shaft.
  • the suction socket is preferably arranged on the base body element, in particular formed in one piece with the base body element.
  • the protective hood device preferably comprises at least one securing unit, by means of which the cover element can be secured in a closed position on the base body element.
  • the securing unit preferably comprises a spring-loaded securing element which can engage in a securing recess.
  • the safety unit it is also conceivable for the safety unit to have a different design that would appear sensible to a person skilled in the art, such as a design as a spring-elastic locking tab, as a movably mounted locking clip or the like operators can be reached.
  • a light and yet very robust protective hood device can advantageously be implemented, particularly when the protective hood device is designed to accommodate tools with a maximum outer diameter of more than 180 mm, preferably more than 200 mm and very particularly preferably more than 210 mm.
  • the hand-held power tool device according to the invention and/or the hand-held power tool according to the invention should/should not be limited to the application and embodiment described above.
  • the hand-held power tool device according to the invention and/or the hand-held power tool according to the invention can/can have a number of individual elements, components and units that differs from a number specified here in order to fulfill a function described herein.
  • values lying within the specified limits should also be considered disclosed and can be used as desired.
  • FIG 1 shows a hand-held power tool 42 with at least one hand-held power-tool device 10.
  • the hand-held power tool 42 is designed in particular as a window milling machine or assembly milling machine. However, it is also conceivable that hand-held power tool 42 has a different configuration that appears reasonable to a person skilled in the art, such as a configuration as an angle grinder, a circular saw or the like.
  • Hand-held power tool 42 includes a motor housing 56 for receiving and supporting a drive unit 58 of hand-held power tool 42. Motor housing 56 forms preferably at least partially a handle of handheld power tool 42.
  • handheld power tool 42 it is also conceivable for handheld power tool 42 to have a handle housing in addition to motor housing 56, which forms the handle of handheld power tool 42 in a manner already known to a person skilled in the art.
  • the drive unit 58 preferably comprises at least one electric motor 60 for generating a driving force and/or a driving torque.
  • Motor housing 56 is arranged on hand-held power tool device 10 , in particular connected to hand-held power tool device 10 .
  • the motor housing 56 is preferably arranged on an angular gear housing 26 of a gear unit 12 of the hand-held power tool device 10 , in particular fastened thereto.
  • Hand-held power tool 42 includes a guard device 44, which has a base body element 50 and at least one cover element 52 that is movably mounted on base body element 50, which together delimit a receiving space 54 of guard device 44 for an insert tool (not shown here in detail), with base body element 50 and the Covering element 52 are formed from sheet steel, in particular with a maximum material thickness of less than 2 mm.
  • the base body element 50 and the cover element 52 are formed from sheet steel with a tensile strength of more than 1000 N/mm 2 , preferably more than 1200 N/mm 2 and very particularly preferably more than 1300 N/mm 2 .
  • the body member 50 and the cover member 52 are formed from a sheet steel sold under the tradename Docol® .
  • the base body element 50 and the cover element 52 may be formed from a different material that appears sensible to a person skilled in the art, which essentially has similar material properties than the material marketed under the trade name Docol ® .
  • the protective hood device 44 is arranged on the hand-held power tool 42, in particular on the hand-held power tool device 10, so that it can be removed.
  • FIG 2 shows the protective hood device 44 in a state removed from the hand-held power tool 42, in particular from the hand-held power tool device 10.
  • the cover element 52 is preferably movably mounted on the base body element 50, in particular to open or close the receiving space 54.
  • the cover element 52 is mounted pivotably about an axis 62 on the base body element 50 (cf. figure 2 ).
  • the cover element 52 preferably comprises at least one contact surface 64, which is provided for contacting a workpiece in a machining state.
  • Axis 62, about which cover element 52 can be pivoted relative to base body element 50, runs at least substantially parallel to contact surface 64 of the at least one cover element 52.
  • the protective hood device 44 preferably comprises at least one securing unit 70, by means of which the cover element 52 can be secured in a closed position on the base body element 50.
  • the securing unit 70 preferably comprises a spring-loaded securing element 72 which can engage in at least one securing recess 74 in the securing unit 70 .
  • the securing element 72 is preferably arranged on the base body element 50, in particular movably mounted thereon.
  • the at least one securing recess 74 is preferably arranged on the cover element 52.
  • the securing unit 70 it is also conceivable for the securing unit 70 to have a different design and/or arrangement of the securing element 72 and/or the at least one securing cutout 74 that appears sensible to a person skilled in the art.
  • the base body element 50 comprises one or more stiffening ribs 66 (in figure 2 shown only schematically).
  • the stiffening rib(s) 66 is/are preferably formed from the same material as the body member 50 .
  • the stiffening rib(s) 66 is/are preferably formed in one piece with the base body element 50 by means of a welding process, in particular a laser welding process.
  • the base body element 50 comprises one or more beads on an inner side of the base body element 50 as an alternative or in addition to the stiffening rib(s) 66 .
  • the protective hood device 44 preferably includes a suction nozzle 68 to which a, in particular external, suction device (not shown in detail here), such as a vacuum cleaner or the like, can be connected.
  • the suction socket 68 is preferably arranged on the base body element 50 , in particular formed in one piece with the base body element 50 .
  • FIG 3 shows a schematic detailed view of the hand-held power tool device 10.
  • the hand-held power tool device 10 comprises at least the gear unit 12, which comprises at least one bevel gear 14 and at least one countershaft gear and/or front-end gear 16, wherein the bevel gear 14 has at least one bevel gear input shaft 20 comprising a rotational axis 18, a one rotational axis 22 comprehensive bevel gear output shaft 24 and the bevel gear input shaft 20 and the bevel gear output shaft 24 rotatably mounted bevel gear housing 26 has.
  • the countershaft and/or front-end transmission 16 has at least one output shaft 30 including a rotational axis 28 .
  • the output shaft 30, viewed along a direction 32 directed away from the bevel gear housing 26, in particular on a side facing away from a connection interface 76 of the bevel gear housing 26, and running at least essentially parallel to the axis of rotation 18 of the bevel gear input shaft 20, is arranged after the bevel gear output shaft 24.
  • the axis of rotation 28 of the output shaft 30, viewed along the directed away from the bevel gear housing 26 and at least Direction 32 running essentially parallel to the axis of rotation 18 of the bevel gear input shaft 20 is offset from the axis of rotation 22 of the bevel gear output shaft 24 .
  • the output shaft 30 is preferably arranged for the most part, in particular completely, in a front region 34 of the bevel gear housing 26, with the front region 34 of the bevel gear housing 26, viewed along the axis directed away from the bevel gear housing 26 and at least essentially parallel to the axis of rotation 18 of the bevel gear input shaft 20 extending direction 32, between the bevel gear output shaft 24 and a front housing edge 78 of the bevel gear housing 26 extends.
  • the front housing edge 78 of the bevel gear housing 26 is preferably arranged on a side of the bevel gear housing 26 which faces away from the connection interface 76 of the bevel gear housing 26 .
  • the connection interface 76 of the bevel gear housing 26 is preferably provided to connect the bevel gear housing 26 to the motor housing 56 of the hand power tool 42 comprising the hand power tool device 10 .
  • the bevel gear 14 is preferably designed as a ring gear or as a crown gear.
  • the bevel gear 14 preferably has an axis angle of 90°. It is also conceivable, however, for the bevel gear 14 to have a different design and/or a different axis angle that seems reasonable to a person skilled in the art.
  • the bevel gear 14 can be designed with a spur gear, a helical gear or a helical gear with axial offset.
  • the bevel gear input shaft 20 can be configured in one piece with a drive shaft of the drive unit 58 , in particular a rotor shaft of an electric motor 60 of the drive unit 58 of the hand-held power tool 42 comprising the hand-held power tool device 10 .
  • the bevel gear input shaft 20 is formed by the drive shaft of the drive unit 58, in particular the rotor shaft of the electric motor 60.
  • the bevel gear input shaft 20 is separate from the drive shaft is formed and is non-rotatably connected to the drive shaft, in particular is connected, by means of a clutch or another connection that appears sensible to a person skilled in the art and is designed for torque transmission.
  • the axis of rotation 18 of the bevel gear input shaft 20 preferably runs at least substantially parallel, in particular coaxially, to an axis of rotation of the drive shaft of the drive unit 58, in particular the rotor shaft of the electric motor 60.
  • a gear wheel 80 in particular a pinion, of the angle gear 14 is preferably arranged in a rotationally fixed manner on the angle gear input shaft 20 .
  • a further gear wheel 82 in particular a ring gear or a crown wheel, of the bevel gear 14 is preferably arranged in a rotationally fixed manner on the bevel gear output shaft 24, in particular on an end region of the bevel gear output shaft 24 facing the bevel gear input shaft 20.
  • the gear wheel 80 preferably engages with the further gear wheel 82, in particular on it a transmission of a driving force and/or a driving torque.
  • the axis of rotation 18 of the bevel gear input shaft 20 and the axis of rotation 22 of the bevel gear output shaft 24 preferably enclose an angle of 90°.
  • the axis of rotation 18 of the bevel gear input shaft 20 and the axis of rotation 22 of the bevel gear output shaft 24 enclose an angle other than 90°, in particular depending on the design of the bevel gear 14, the handheld power tool 42 and/or their area of application.
  • the bevel gear input shaft 20 and the bevel gear output shaft 24 are rotatably mounted in the bevel gear housing 26, in particular in a manner already known to a person skilled in the art, by means of bearing elements, in particular by means of roller bearings and/or plain bearings, of the bevel gear 14.
  • the bevel gear output shaft 24 preferably extends into a housing 38 of the countershaft and/or auxiliary gear 16, in particular with an end of the bevel gear output shaft 24 facing away from the other gear wheel 82.
  • An additional gear wheel is preferably on the bevel gear output shaft 24 84, in particular a spur gear, of the bevel gear 14 in a rotationally fixed manner, in particular on the end of the bevel gear output shaft 24 facing away from the further gear 82.
  • a bearing element, in particular a ball bearing, of the bevel gear 14 is preferably on, in particular in, the housing 38 of the countershaft or attachment gear 16 for a rotatable mounting of the bevel gear output shaft 24 is arranged.
  • a further additional gear wheel 86, in particular a spur gear, of countershaft and/or front-mounted gear unit 16 is preferably arranged in a rotationally fixed manner on output shaft 30, in particular on an end of the output shaft 30 facing bevel gear output shaft 24.
  • the additional gear wheel 84 preferably meshes with the further additional gear wheel 86.
  • countershaft transmission and/or front-end transmission 16 has at least one intermediate gear (not shown in detail here), which is arranged between additional gear 84 and the further additional gear 86 and is connected to additional gear 84 and meshes with the further additional gear wheel 86, in particular in order to align at least one direction of rotation of the output shaft 30 with a direction of rotation of the bevel gear output shaft 24, in particular in such a way that the output shaft 30 and the bevel gear output shaft 24 have the same direction of rotation.
  • a direction of rotation of the output shaft 30 can be switched, in particular by means of a switching unit (not shown in detail here) of the countershaft and/or auxiliary transmission 16, which is arranged in the housing 38 of the countershaft and/or auxiliary transmission 16 and in particular is provided in addition to a drive unit switching unit for reversing the direction of rotation of the drive unit 58 of the hand-held power tool 42 .
  • the switching unit can have a configuration already known to a person skilled in the art and can be provided for switching as a result of an axial movement or as a result of a pivoting movement of at least part of the transmission unit 12 .
  • the axis of rotation 28 of the output shaft 30 preferably runs at least substantially parallel to the axis of rotation 22 of the bevel gear output shaft 24.
  • the axis of rotation 28 of the output shaft 30 preferably runs transversely, in particular at least essentially perpendicularly, to the axis of rotation 18 of the bevel gear input shaft 20.
  • the attachment interface 88 preferably has a design already known to those skilled in the art.
  • the output shaft 30 is arranged in a region 34, in particular in a region 34 of the bevel gear housing 26, which, viewed along the direction 32 directed away from the bevel gear housing 26 and running at least essentially parallel to the axis of rotation 18 of the bevel gear input shaft 20, towards a plane of rotation 36 is arranged, which extends at least substantially perpendicular to the axis of rotation 18 of the bevel gear input shaft 20 and in which the axis of rotation 22 of the bevel gear output shaft 24 runs.
  • the output shaft 30 is preferably located within a vicinity of the front housing edge 78 of the angular gear housing 26 .
  • the area close to the front housing edge 78 of the bevel gear housing 26 extends in particular, starting from the front housing edge 78 of the bevel gear housing 26, up to a maximum of 30 mm or at most up to 40% of a maximum longitudinal extension of the bevel gear housing 26 in the direction of the bevel gear housing 26.
  • the countershaft and/or front-end transmission 16 has the housing 38 for mounting the output shaft 30, which is rotatably mounted on the bevel gear housing 26 (cf. figure 1 ).
  • the output shaft 30 is preferably arranged in the housing 38 in such a way that at least the axis of rotation 28 of the output shaft 30 intersects the bevel gear housing 26, in particular in any rotational position of the housing 38 relative to the bevel gear housing 26.
  • the axis of rotation 28 of the output shaft 30 is preferably arranged eccentrically to an axis of rotation of the housing 38 .
  • the axis of rotation of the housing 38 preferably runs coaxially to the axis of rotation 22 of the bevel gear output shaft 24.
  • the axis of rotation 18 of the bevel gear input shaft 20 and the axis of rotation 28 of the output shaft 30 span a common plane which, in particular in at least one rotational position of the housing 38 of the countershaft transmission and/or front-end transmission 16 relative to the bevel gear housing 26, is transverse, in particular at least essentially perpendicular , To the plane of rotation 36 of the bevel gear output shaft 24 extends.
  • the common plane extends in further rotational positions of the housing 38 of the countershaft and/or front-end transmission 16 relative to the bevel gear housing 26 transversely to the plane of rotation 36.
  • the housing 38 and the bevel gear housing 26 in at least one exemplary embodiment of the hand-held power tool device 10 are immovably connected to one another and the common plane always extends at least substantially perpendicularly to the plane of rotation 36 .
  • the hand-held power tool device 10 comprises at least one positioning unit 40 (cf. figures 1 , 3 , 4 and 5 ), wherein the countershaft and/or front-end transmission 16 has the housing 38 for supporting the output shaft 30, which is rotatably mounted on the bevel gear housing 26, wherein a rotational position of the housing 38 relative to the bevel gear housing 26 by means of the positioning unit 40, in particular continuously or in steps , is fixable.
  • the positioning unit 40 is preferably provided for fixing the rotational positions of the housing 38 relative to the bevel gear housing 26 by means of a positive and/or non-positive connection.
  • At least one spring-loaded latching element 90, in particular a latching lever, of positioning unit 40 is preferably arranged on bevel gear housing 26, in particular movably mounted thereon (cf. Figures 3 and 4 ).
  • One or more locking recesses 92 of the positioning unit is/are preferred 40 arranged on the housing 38, which is/are intended to interact with the latching element 90 (cf. Figures 3 and 5 ).
  • the latching element 90 is arranged on the housing 38 and the latching recess/s 92 are arranged on the bevel gear housing 26 .
  • the positioning unit 40 can alternatively or additionally fix rotational positions of the housing 38 relative to the bevel gear housing 26 by means of frictional locking elements or the like.
  • the countershaft and/or front-end transmission 16 has the housing 38 for supporting the output shaft 30, which, in particular in at least one rotational position of the housing 38 relative to the bevel gear housing 26, along the direction 32 running at least substantially parallel to the axis of rotation 18 of the bevel gear input shaft 20 protrudes beyond the bevel gear housing 26.
  • a maximum projection of the housing 38 along the direction 32 running at least essentially parallel to the axis of rotation 18 of the bevel gear input shaft 20 is preferably less than 20 mm or less than 25% of the maximum longitudinal extension of the bevel gear housing 26, preferably less than 15 mm or less than 20%. the maximum longitudinal extension of the bevel gear housing 26.
  • the output shaft 30 is preferably at least partially arranged in the area of the housing 38 which, in particular in at least one rotational position of the housing 38 relative to the bevel gear housing 26, along the at least substantially parallel to the axis of rotation 18 of the bevel gear input shaft 20 Direction 32 on the bevel gear housing 26 protrudes.
  • the protective hood device 44 is movably mounted on the transmission unit 12, in particular on the housing 38 of the countershaft transmission and/or front-end transmission 16, with the protective hood device 44 having at least one guide unit 48 (cf. figures 1 and 2 ), in particular a guide carriage, for a translationally movable mounting of the protective hood device 44 relative to the gear unit 12, wherein at least the bevel gear housing 26 is rotatably mounted relative to the protective hood device 44.
  • the guide unit 48 is preferred intended to mount the protective hood device 44 on the transmission unit 12 so that it can move in a translatory manner.
  • the guide unit 48 preferably comprises at least one guide element 94, in particular a guide carriage element, which is fixed to the protective hood device 44, in particular to the base body element 50 of the protective hood device 44.
  • the guide unit 48 comprises at least one further guide element 96, in particular a further guide carriage element, which is movably mounted on the guide element 94, in particular movably mounted in a translatory manner.
  • the further guide element 96 is preferably fixed to the transmission unit 12, in particular to the housing 38 of the countershaft and/or front-end transmission 16.
  • the guide unit 48 is preferably designed as a guide carriage. It is conceivable that the guide unit 48 includes roller bearing elements or plain bearing elements in order to realize a translational, movable mounting of the guide element 94 and the further guide element 96 relative to one another.
  • the output shaft 30 is arranged on the protective hood device 44 in such a way that the axis of rotation 28 of the output shaft 30 has a maximum distance from a workpiece contact surface 46 of the protective hood device 44 that is less than 28 mm.
  • the output shaft 30 is preferably arranged on the protective hood device 44 in such a way that the axis of rotation 28 of the output shaft 30 has a maximum distance from the workpiece contact surface 46 of the protective hood device 44, which is preferably less than 25 mm is less than 23 mm.
  • a position in which the axis of rotation 28 of the output shaft 30 has a maximum distance from a workpiece contact surface 46 of the protective hood device 44 that is less than 28 mm can be a fixed position of the transmission unit 12 relative to the protective hood device 44 or it can be a position in which the gear unit 12 can be moved as a result of a movable mounting of the protective hood device 44 on the gear unit 12 .
  • a position in which the axis of rotation 28 of the output shaft 30 has a maximum distance from the workpiece contact surface 46 of the protective hood device 44, which is less than 28 mm a foremost position of the gear unit 12 relative to the workpiece contact surface 46, in which the gear unit 12 has been moved closest to the workpiece contact surface 46.
  • the maximum distance between the axis of rotation 28 of the output shaft 30 relative to the workpiece contact surface 46 in the at least one position of the protective hood device 44 relative to the transmission unit 12 extends along an axis that is at least substantially perpendicular to the axis of rotation 28 of the output shaft 30, in particular to the plane of rotation 36 of the bevel gear output shaft 24 Direction.
  • the workpiece contact surface 46 of the protective hood device 44 preferably delimits an insertion tool feed-through opening (not shown here) in the protective hood device 44, through which the inserted tool can extend in a manner already known to a person skilled in the art when the inserted tool is in a state on the output shaft 30, in particular along the at least substantially perpendicular to the axis of rotation 28 of the output shaft 30, in particular to the plane of rotation 36 of the bevel gear output shaft 24 direction.
  • the workpiece contact surface 46 preferably extends at least essentially perpendicularly to the contact surface 64.
  • the protective hood device 44 is preferably provided to hold insert tools with a maximum external diameter of more than 180 mm, preferably more than 200 mm and very particularly preferably more than 210 mm .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
EP22186402.8A 2021-08-13 2022-07-22 Dispositif de machine-outil portative, ainsi que machine-outil portative dotée d'un dispositif de machine-outil portative Active EP4134203B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021121135.2A DE102021121135A1 (de) 2021-08-13 2021-08-13 Handwerkzeugmaschinenvorrichtung sowie Handwerkzeugmaschine mit einer Handwerkzeugmaschinenvorrichtung

Publications (2)

Publication Number Publication Date
EP4134203A1 true EP4134203A1 (fr) 2023-02-15
EP4134203B1 EP4134203B1 (fr) 2024-08-28

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Country Status (2)

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EP (1) EP4134203B1 (fr)
DE (1) DE102021121135A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011084495A1 (de) 2011-10-14 2013-04-18 Robert Bosch Gmbh Werkzeugvorsatz
US20140346744A1 (en) * 2012-11-15 2014-11-27 Robert Bosch Gmbh Tool attachment for a hand-held machine tool
US20150217422A1 (en) * 2014-02-06 2015-08-06 Robert Bosch Gmbh Hand Power Tool having an Electronically Commutated Electric Motor
DE102014102859A1 (de) 2014-03-04 2015-09-10 Eberhard Berhalter Handwerkzeugmaschinenvorrichtung
DE102012212404B4 (de) 2012-07-16 2017-09-28 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102016109049A1 (de) 2016-05-17 2017-11-23 Eberhard Berhalter Handwerkzeugmaschinenvorrichtung zu einer beweglichen Lagerung einer Welle in einer Führungsbahn
DE202018103581U1 (de) * 2018-06-25 2018-07-11 Gerima Holding Gmbh Fräsmaschine, insbesondere Handfräsmaschine zum Fräsen von Fasen und Verrundungen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011084495A1 (de) 2011-10-14 2013-04-18 Robert Bosch Gmbh Werkzeugvorsatz
DE102012212404B4 (de) 2012-07-16 2017-09-28 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
US20140346744A1 (en) * 2012-11-15 2014-11-27 Robert Bosch Gmbh Tool attachment for a hand-held machine tool
US10011008B2 (en) 2012-11-15 2018-07-03 Robert Bosch Gmbh Tool attachment for a hand-held machine tool
US20150217422A1 (en) * 2014-02-06 2015-08-06 Robert Bosch Gmbh Hand Power Tool having an Electronically Commutated Electric Motor
DE102014102859A1 (de) 2014-03-04 2015-09-10 Eberhard Berhalter Handwerkzeugmaschinenvorrichtung
DE102016109049A1 (de) 2016-05-17 2017-11-23 Eberhard Berhalter Handwerkzeugmaschinenvorrichtung zu einer beweglichen Lagerung einer Welle in einer Führungsbahn
DE202018103581U1 (de) * 2018-06-25 2018-07-11 Gerima Holding Gmbh Fräsmaschine, insbesondere Handfräsmaschine zum Fräsen von Fasen und Verrundungen

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DE102021121135A1 (de) 2023-02-16
EP4134203B1 (fr) 2024-08-28

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