EP3539725B1 - Système de machine-outil portative comprenant une machine-outil portative et un accessoire - Google Patents

Système de machine-outil portative comprenant une machine-outil portative et un accessoire Download PDF

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Publication number
EP3539725B1
EP3539725B1 EP19167348.2A EP19167348A EP3539725B1 EP 3539725 B1 EP3539725 B1 EP 3539725B1 EP 19167348 A EP19167348 A EP 19167348A EP 3539725 B1 EP3539725 B1 EP 3539725B1
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EP
European Patent Office
Prior art keywords
power tool
portable power
unit
tool
tool system
Prior art date
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Application number
EP19167348.2A
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German (de)
English (en)
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EP3539725A1 (fr
Inventor
Dietmar Saur
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3539725A1 publication Critical patent/EP3539725A1/fr
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    • 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
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • An accessory device for an arrangement on a handheld power tool with at least one coupling unit which is provided for releasable mechanical coupling with the handheld power tool, in particular for coupling to an insert tool holder of the handheld power tool, and with a tool holder for accommodating an insert tool has already been proposed.
  • a handheld power tool system with a handheld power tool and an accessory device is off U.S. 4,489,792 A and U.S. 5,711,380 A known.
  • the invention is based on a handheld power tool system according to claim 1.
  • the accessory device comprises at least one detent hammer unit which, in at least one operating state, is provided to generate an impact pulse for a striking drive of the tool holder.
  • An accessory device for drilling hard masonry, such as concrete, or hard rock can be provided. It can a particularly compact accessory device can be provided.
  • a field of application of a handheld power tool can advantageously be expanded.
  • An accessory device can be provided that can be used with various basic devices, in particular various handheld power tools.
  • An accessory device can be provided for a large number of different tools, such as different round shank drills, stirrers, grinding wheels, grinding disks or brushes.
  • a high overall benefit of the handheld power tool can be achieved.
  • a high level of user comfort can be achieved.
  • a particularly easily exchangeable accessory device can be provided, for example if a usability is restricted and / or limited due to wear.
  • an “accessory device” is to be understood in particular as a device which is provided for operation with a basic device which has a drive unit for a rotary drive.
  • the accessory device is preferably provided for a specific purpose.
  • the accessory device is preferably provided exclusively for operation with a basic device, in particular with a handheld power tool.
  • the accessory device is preferably exchangeable for other accessory devices with the same purpose or with a different purpose.
  • the basic device can particularly preferably be operated independently of the accessory device.
  • a “handheld power tool” is intended to mean, in particular, a workpiece-processing machine that can be held in the hand for use by an operator, but advantageously a cordless screwdriver, a drill, a drill and / or hammer, a saw, a plane, a screwdriver , a milling machine, a grinder, an angle grinder, a garden tool and / or a multi-function tool.
  • the handheld power tool preferably has a drive unit for a rotary drive, preferably an electric drive unit, for example an electric motor.
  • the handheld power tool can preferably be operated independently of the mains.
  • the handheld power tool can preferably be coupled to an energy storage device, for example a battery pack.
  • an “insert tool holder” should be understood to mean a holder for at least one insert tool, for example for an insert bit.
  • the tool insert holder is preferably designed as part of a machine interface which is provided for the purpose of connecting the accessory devices with a housing unit at the same time and to be coupled with an output shaft.
  • a "detent hammer mechanism” is to be understood as a unit which is provided to translate a rotary movement into a periodic axial movement.
  • the detent hammer mechanism is preferably provided to translate a rotary drive into an at least partially translational drive.
  • the detent hammer mechanism preferably has at least one pair of corresponding inclined surfaces, which are arranged obliquely to a cross section perpendicular to a working axis.
  • a “beating pulse” is to be understood in particular as a periodically repeatable beating pulse.
  • the impact pulse is preferably designed as an axial pulse and has an axially aligned component, the amount of which is at least 80 percent, preferably 90 percent and preferably 95 percent of a total amount of the impact pulse.
  • Directional indications such as “axial”, “radial”, “in the circumferential direction” are to be understood in this context in particular in relation to an axis of rotation, preferably in relation to an axis of rotation.
  • “Provided” is to be understood in particular as specifically designed and / or equipped. The fact that an object is provided for a specific function should be understood in particular to mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.
  • the detent striking mechanism unit comprises at least one drive element which has a connection area which can be connected in terms of drive technology to an insert tool holder of the handheld power tool.
  • a drive can advantageously be transmitted from the handheld power tool to the accessory device.
  • a “drive element” is to be understood in particular as an element which is provided to transmit and / or pass on a drive movement, preferably a rotary movement and / or an angular momentum.
  • the drive element is preferably provided to transmit a rotary movement in an axial direction and is designed, for example, as a shaft. It is conceivable that the drive element is designed as a wheel or has a plurality of wheels.
  • the drive element can preferably be plugged onto the insert tool holder.
  • a drive element of the detent hammer mechanism is designed as a spindle which can be connected to an insert tool holder of the handheld power tool in an axially movable and rotationally fixed manner.
  • the ratchet hammer mechanism can be connected to the handheld power tool in a particularly simple, fast and reliable manner in terms of drive technology.
  • a detent hammer mechanism with a particularly simple structure can be provided.
  • a particularly compact detent hammer mechanism can be provided.
  • the drive element is preferably provided for an axial movement relative to the insert tool holder, at least during a percussion drilling operation. In a coupled state, the drive element preferably engages in a recess in the insert tool holder. It is also conceivable that the drive element has a receptacle into which an element of the insert tool receptacle engages in a coupled state.
  • the tool holder at least partially covers the detent hammer mechanism radially.
  • an existing installation space can be used particularly advantageously.
  • a particularly compact accessory device can be provided.
  • “radially overlapping” is to be understood in particular to mean that the tool holder at least essentially completely encloses and / or surrounds at least one element of the detent hammer mechanism.
  • the tool holder preferably covers at least one element of the detent hammer unit at least 80 percent, preferably at least 90 percent and particularly preferably at least 95 percent of a radial outer surface of the element.
  • the detent hammer mechanism have at least one spring element which is provided to switch the hammering drive as a function of a contact pressure.
  • the accessory device can be operated easily and intuitively. A high level of operating convenience can be achieved. The operating time of the detent hammer unit can be minimized. A particularly low-wear operation of the accessory device can be achieved.
  • contact pressure should be understood to mean a pressure which an operator provides in an operating state during an operation movement.
  • a “spring element” is to be understood in particular as an elastic force storage element become.
  • the spring element is preferably designed as a helical compression spring.
  • the spring element is preferably arranged concentrically to the drive element of the detent hammer mechanism.
  • the detent hammer mechanism has at least one locking unit for switching off the hammer.
  • the locking unit is preferably provided for actuation by the operator.
  • the locking unit preferably comprises an actuating element which is arranged in the axial direction between the drill chuck and the coupling unit.
  • a "percussion shutdown" is to be understood as a unit which is provided to switch off, interrupt and / or decouple a percussive drive.
  • the accessory device preferably has a rotary drive which can be used independently of the impact shutdown.
  • the detent hammer mechanism does not have a device for switching off the hammer. In such an embodiment, the accessory device is always provided for percussion drilling.
  • the locking unit is provided to fix an axial position of the tool holder relative to the coupling unit in at least one operating state.
  • a structurally simple locking unit can be provided for an impact shutdown.
  • the locking unit is preferably provided to disengage latching elements and / or latching areas of the latching hammer mechanism and / or to fix them in a mutually non-engaging position.
  • the accessory device comprises at least one gear unit which is provided to translate a speed and / or a torque of an output shaft of the handheld power tool into a speed and / or a torque of the tool holder.
  • a speed of the accessory device can advantageously be adapted to a hammer drill operation.
  • a particularly powerful accessory device can be provided.
  • the gear unit is preferably designed as a planetary gear.
  • the transmission unit have at least two shiftable transmission gears.
  • a large area of application of the accessory device can be achieved for this purpose.
  • a “gear” should be understood to mean, in particular, a state of a transmission that defines and / or sets a transmission ratio of the transmission.
  • a handheld power tool system can be provided for a wide range of applications. A large number of work cases and / or applications can be achieved.
  • a particularly inexpensive handheld power tool system can be provided for a percussion drilling operation. The use of a specially designed hammer drill can be avoided.
  • a particularly light and / or particularly compact handheld power tool, in particular a cordless screwdriver, can be provided for coupling to the accessory device.
  • a hand-held power tool system can be provided for a particularly simple change of use, for example between percussion drilling, drilling and / or screwing.
  • a particularly powerful handheld power tool system can be provided.
  • Figure 1 shows a system 34a with a handheld power tool 12a and with an accessory device 10a, which includes a detent hammer unit 20a.
  • the system 34a is provided in particular for drilling or impact drilling.
  • the accessory device 10a is provided for an arrangement on the handheld power tool 12a and comprises a coupling unit 14a which is provided for coupling the accessory device 10a to the handheld power tool 12a.
  • the coupling unit 14a is provided for coupling to an insert tool holder 16a of the handheld power tool 12a.
  • the accessory device 10a comprises a tool holder 18a for receiving an insert tool. It is conceivable that the system 34a includes further accessory devices which are provided for coupling to the handheld power tool 12a.
  • the detent hammer mechanism unit 20a is provided in at least one operating state to generate an impact pulse for a striking drive of the tool holder 18a.
  • the accessory device 10a comprises a housing unit 36a on which the detent hammer unit 20a is arranged.
  • the tool holder 18a is mounted on the housing unit 36a such that it can move axially.
  • handheld power tool 12a is designed as a cordless screwdriver.
  • the handheld power tool 12a comprises an electric drive unit 38a which has an electric motor.
  • the handheld power tool 12a comprises an output shaft 32a, which is provided for a to transmit torque generated by the drive unit 38a and / or a rotary movement (cf. Figure 2 ).
  • the handheld power tool 12a is designed in the shape of a pistol in the present exemplary embodiment.
  • the handheld power tool 12a has a drive and work area 40a and a grip area 42a.
  • the handheld power tool 12a has a drive and working axis 44a and a handle axis 46a.
  • the drive and working axis 44a and the handle axis 46a enclose an angle of approximately 80 degrees with one another.
  • the drive and working axis 44a and the handle axis 46a enclose an angle which has a value in a value range between 60 degrees and 90 degrees or another value that appears suitable to the person skilled in the art. It is also conceivable that the drive and working axis 44a and the handle axis 46a are arranged in alignment with one another.
  • the handheld power tool 12a comprises a switching unit which is provided to switch the drive unit 38a on and / or off and / or to set a speed of the handheld power tool 12a and / or a torque of the handheld power tool 12a.
  • the switching unit has an actuating element 48a which is provided for actuation by a user.
  • the actuating element 48a is designed as a pressure switch.
  • the handheld power tool 12a includes a torque limiter that is provided to set a maximum torque transmitted from the drive unit 38a to the output shaft 32a.
  • the torque limiter comprises an adjusting ring 50a which is provided for operation by the user.
  • the handheld power tool 12a comprises a gear unit 52a.
  • the gear unit 52a is provided to translate a speed and / or a torque of the drive unit 38a into a speed and / or a speed of the tool holder 18a.
  • the transmission unit 52a has a plurality of transmission gears which have a different transmission ratio.
  • the hand-held power tool 12a includes a gear changeover which is provided to set a gear.
  • the gear change has an actuating element 54a which is provided for operation by the user.
  • the actuating element 54a is designed as a sliding element.
  • the handheld power tool 12a includes a direction of rotation switchover, which is provided to set a direction of rotation of the output shaft 32a.
  • the change of direction of rotation has an actuating element 56a, which is intended to be operated by the user.
  • the actuating element 56a is designed as a sliding element.
  • the handheld power tool 12a comprises a tool housing unit 58a which encloses and supports the drive unit 38a and the gear unit 52a.
  • the tool housing unit 58a extends over the drive and work area 40a and the grip area 42a.
  • the handheld power tool 12a is provided for a power supply by a rechargeable battery device 60a.
  • the handheld power tool 12a has a battery interface unit for the battery device 60a.
  • the battery interface unit for the battery device 60a is arranged at an end of the grip area 42a facing away from the drive and work area 40a.
  • the rechargeable battery interface unit is provided to connect a housing unit 62a of the rechargeable battery device 60a to the tool housing unit 58a of the handheld power tool 12a in a detachable manner without tools.
  • the hand-held power tool 12a comprises a machine interface 64a, which is provided for a fastening of the accessory device 10a that is preferably secured against rotation (cf. Figure 3 ).
  • the machine interface 64a has a fastening element 66a arranged on an end face of the tool housing unit 58a.
  • the fastening element 66a is sleeve-shaped and / or ring-shaped, at least in sections.
  • the fastening element 66a has at least one locking element 68a and at least two holding elements 70a, 72a on an outer circumference.
  • the locking element 68a preferably has at least one locking toothing and the at least two holding elements 70a, 72a in the present exemplary embodiment are designed in the manner of bayonets to form a bayonet connection.
  • the machine interface 64a is provided for a mechanical connection of the accessory device 10a.
  • the coupling unit 14a of the accessory device 10a is provided for a releasable mechanical coupling with the machine interface 64
  • the output shaft 32a emerges from the handheld power tool 12a in the area of the machine interface 64a.
  • the output shaft 32a has an axis of rotation which corresponds to the drive and working axis 44a of the handheld power tool 12a.
  • the output shaft 32a forms the insert tool holder at a free end 16a of the handheld power tool 12a.
  • the insert tool holder 16a is provided to hold an exchangeable insert tool, for example a tool bit, preferably with a screwdriver blade, or a hexagon attachment.
  • the insert tool holder 16a is designed as a polygonal internal holder and has a polygonal cross section.
  • the insert tool holder 16a is designed as a hexagonal internal holder, for example to accommodate a HEX drill or a screw bit.
  • the coupling unit 14a of the accessory device 10a is provided to interact with the machine interface 64a of the handheld power tool 12a.
  • the coupling unit 14a and the machine interface 64a are provided to connect the tool housing unit 58a of the handheld power tool 12a and the housing unit 62a of the accessory device 10a to one another in a detachable manner without tools.
  • the machine interface 64a and the coupling unit 14a each have a form-fit area.
  • the form-fit areas are provided for a form-fit connection with one another.
  • the machine interface 64a and the coupling unit 14a each have a frictional connection area.
  • the frictional connection areas are provided for a frictional connection with one another.
  • the coupling unit 14a and the machine interface 64a are provided to lock together.
  • the coupling unit 14a and the machine interface 64a form a bayonet connection in the present exemplary embodiment.
  • the coupling unit 14a has an actuating element 74a which is provided to release a latching of the coupling unit 14a with the machine interface 64a of the handheld power tool 12a.
  • the tool holder 18a is provided for receiving an insert tool, for example a tool bit, a drill, in particular a round shank drill, a stirrer, a grinding tool, a brush or another insert tool that appears sensible to a person skilled in the art.
  • the tool holder 18a is designed as a chuck.
  • the detent hammer mechanism unit 20a comprises a drive element 22a, which has a connection region 24a, which in a state of the insert tool receptacle connected to the handheld power tool 12a by means of the coupling unit 14a 16a of the handheld power tool 12a can be connected in terms of drive technology (cf. Figure 4 ).
  • the drive element 22a is provided to transmit a torque and / or a rotary movement from the output shaft 32a of the handheld power tool 12a to the tool holder 18a.
  • the connection region 24a is arranged on an end of the drive element 22a facing away from the tool holder 18a.
  • the connection area 24a is designed to correspond to the insert tool receptacle 16a of the handheld power tool 12a.
  • connection region 24a has a cross section which is designed to correspond to the cross section of the insert tool holder 16a of the handheld power tool 12a.
  • the connecting region 24a has an outer circumference in the form of a regular hexagon. In the state connected to the handheld power tool 12a, the connection region 24a partially engages in the insert tool receptacle 16a.
  • the connection area 24a and the insert tool receptacle form a plug connection.
  • the connection area 24a has a drive receptacle, and the output shaft 32a engages in the drive receptacle of the connection area 24a in a connected state.
  • the drive element 22a of the detent hammer mechanism unit 20a is designed as a spindle which can be connected axially movably and non-rotatably to an insert tool holder 16a of the handheld power tool 12a. During percussion drilling operation, the spindle oscillates in the axial direction in the insert tool holder 16a of the handheld power tool 12a.
  • the drive element 22a is firmly connected to the tool holder 18a.
  • the drive element 22a is designed in the form of a shaft.
  • One end of the drive element 22a facing away from the coupling unit 14a engages in the tool holder 18a.
  • the drive element 22a has an annular collar 76a which, in an assembled state, is in contact with a surface of the tool holder 18a facing the coupling unit 14a.
  • the collar 76a is provided to transmit an axial force from the tool holder 18a to the drive element 22a.
  • the tool holder 18a covers the detent hammer unit 20a at least partially radially.
  • the accessory device 10a has a common cross section of the tool holder 18a and the detent hammer unit 20a on.
  • the detent hammer unit 20a partially engages in the tool holder 18a.
  • the tool holder 18a has an essentially cylindrical recess 78a in which the detent hammer mechanism 20a is at least partially arranged.
  • the detent striking mechanism unit 20a has a spring element 26a which is provided to switch the striking drive as a function of a contact pressure.
  • the spring element 26a is provided to provide a spring force which is directed opposite to a contact pressure.
  • the spring element 26a is operatively arranged between the tool holder 18a and the coupling unit 14a.
  • the spring element 26a is provided to increase a distance between the tool holder 18a and the coupling unit 14a.
  • a contact pressure is less than the spring force of the spring element 26a and the accessory device 10a has a maximum axial extent.
  • the tool holder 18a and the coupling unit 14a are at a maximum distance from one another.
  • the detent mechanism unit 20a has a first detent element 80a and a further detent element 82a.
  • the catch elements 80a, 82a are not in contact with one another at a maximum axial extent of the accessory device 10a.
  • the detent hammer unit 20a is switched off.
  • an insert tool arranged in the tool holder 18a comes into contact with the workpiece.
  • the operator generates a contact pressure and pushes the drive element 22a deeper into the insert tool holder 16a against the spring force of the spring element 26a.
  • the tool holder 18a moves in the direction of the coupling unit 14a.
  • the axial extent of the accessory device 10a is reduced.
  • the detent elements 80a, 82a of the detent hammer unit 20a come into contact with one another and the detent hammer unit 20a is switched on.
  • the detent hammer unit 20a has two switching states.
  • the detent hammer unit 20a has a first switching state for a drilling operation and a further switching state for a hammer drilling operation.
  • the drive element 22a drives the tool holder 18a in a purely rotating manner.
  • the first switching state is provided for drilling, stirring or grinding, for example.
  • the striking drive is switched off in the first switching state.
  • the drive element 22a drives the tool holder 18a in a rotating and striking manner.
  • the detent striking mechanism unit 20a has a locking unit 28a for switching off the impact.
  • the locking unit 28a is provided to fix an axial position of the tool holder 18a relative to the coupling unit 14a in at least one switching state.
  • the locking unit 28a is provided to fix an axial position of the drive element 22a designed as a spindle relative to the coupling unit 14a in at least one switching state.
  • the locking unit 28a has an axially movable holding element 84a, which is provided to limit an axial range of movement of the drive element 22a.
  • the detent hammer mechanism unit 20a is designed without a device for impact shutdown.
  • the detent striking mechanism unit 20a is provided to be switched on only as a function of a contact pressure.
  • the accessory device 10a is always provided for a percussion drilling operation.
  • the accessory device 10a has a bearing unit 86a which supports the drive element 22a and the holding element 84a rotatably with respect to one another.
  • the bearing unit 86a has an inner bearing ring 88a which is fixedly connected to the drive element 22a.
  • the bearing unit 86a has an outer bearing ring 90a which has an axial contact surface with the holding element 84a.
  • the outer bearing ring 90a is at least one side, at least positively connected to the holding element 84a. It is conceivable that the outer bearing ring 90a is firmly connected to the holding element 84a.
  • the inner bearing ring 88a of the bearing unit 86a is connected to the drive element 22a at least on one side, at least with a form fit.
  • the inner bearing ring 88a is firmly connected to the drive element 22a.
  • the bearing unit 86a is designed as a roller bearing.
  • the roller bearing has a plurality of roller elements 92a, 94a.
  • the rolling elements 92a, 94a are designed as balls in the present exemplary embodiment.
  • the holding element 84a is in the present exemplary embodiment designed as a deep-drawn part.
  • the holding element 84a is pot-shaped in the present exemplary embodiment.
  • the housing unit 62a of the accessory device 10a has a housing element 96a which is provided to support the detent hammer mechanism unit 20a against the insert tool holder 16a of the handheld power tool 12a in at least one operating state.
  • the housing element 96a is provided to transmit an impact pulse to the insert tool holder 16a of the handheld power tool 12a in at least one operating state.
  • the housing element 96a forms engagement means 98a of the coupling unit 14a. It is conceivable that the housing element 96a is designed separately from the coupling unit 14a and is provided for the purpose of transmitting a shock pulse to the coupling unit 14a in at least one operating state.
  • the locking unit comprises a locking element 100a, which is provided to limit an axial range of movement of the tool holder 18a at least in one operating state.
  • the locking element 100a is provided to axially fix the tool holder 18a in a locked state.
  • the locking element 100a is provided to interact with the holding element 84a.
  • the holding element 84a is operatively arranged between the locking element 100a and the drive element 22a.
  • the locking element 100a is operatively arranged between the drive element 22a and the housing element 96a.
  • the locking unit comprises an actuation element 102a which is provided for actuation by the operator.
  • the actuating element 102a is formed in one piece with the locking element 100a.
  • the impact switch-off device transfers an axial force from the tool holder 18a via the holding element 84a, the locking element 100a and the housing element 96a to the insert tool holder 16a of the handheld power tool 12a.
  • the first of the detent elements 80a is designed as a stator disk.
  • the other of the detent elements 82a is designed as a rotor disk.
  • the first Notch element 80a is non-rotatably connected to housing unit 62a of accessory device 10a in an assembled state. In an operating state, the first detent element 80a is non-rotatably connected to the tool housing unit 58a of the handheld power tool 12a by means of the coupling unit 14a.
  • the first detent element 80a is firmly connected to the housing element 96a.
  • the first detent element 80a has an annular base body 104a.
  • the base body 104a has a central opening through which the drive element 22a, designed as a spindle, engages in an assembled state.
  • An outer diameter of the spindle corresponds to an inner diameter of the base body 104a.
  • the first detent element 80a has, on a side facing the tool holder 18a, an annular detent area 106a which is arranged concentrically to the base body 104a.
  • the detent area 106a and the base body 104a have a common inside diameter.
  • the detent region 106a has a serrated profile along a path in the circumferential direction.
  • the detent region 106a has a plurality of inclined surfaces, each of which has a slope in the circumferential direction.
  • the further detent element 82a is non-rotatably connected in a mounted state to the drive element 22a designed as a spindle.
  • the further catch element 82a has an annular base body 108a.
  • the base body 108a has a central opening through which the drive element 22a designed as a spindle engages in an assembled state.
  • An outer diameter of the spindle corresponds to an inner diameter of the base body 104a.
  • the rotor detent disk On a side facing away from the tool holder 18a, the rotor detent disk has an annular detent area 110a which is arranged concentrically to the base body 108a.
  • the detent area 110a and the base body 108a have a common inside diameter.
  • the detent area 110a has a serrated profile along a path in the circumferential direction.
  • a jagged direction of the detent area 110a of the further detent element 82a is arranged opposite to a jagged direction of the detent area 106a of the first detent element 80a.
  • the detent area 110a has a plurality of inclined surfaces, each of which has a slope in the circumferential direction.
  • the detent regions 106a, 110a have a common inside diameter and a common outside diameter.
  • the resting areas 106a, 110a are arranged facing one another in an assembled state.
  • the detent areas 110a engage one another and the inclined surfaces of the detent area 106a of the first detent element 80a come into contact with correspondingly designed inclined surfaces of the further detent element 82a.
  • the inclined surfaces slide over one another and increase a distance between the first detent element 80a and the further detent element 82a.
  • the inclined surfaces slide over one another and increase a distance between the tool holder 18a and the coupling unit 14a.
  • edges that delimit the inclined surfaces lie opposite one another, and the inclined surfaces lose contact.
  • a distance between the catch elements 80a, 82a is reduced due to the contact pressure.
  • the detent areas 106a, 110a strike one another and the first detent element 80a experiences an axial impact pulse from the further detent element 82a.
  • FIG. 5 shows a schematic representation of a further embodiment of an accessory device 10b, which comprises a detent hammer mechanism 20b.
  • the accessory device 10b is provided for an arrangement on a handheld power tool, not shown in detail, and comprises a coupling unit which is provided for coupling to the handheld power tool.
  • the coupling unit is provided for coupling to an insert tool holder of the handheld power tool.
  • the accessory device 10b comprises a tool holder 18b for receiving an insert tool.
  • the detent hammer unit 20b is provided in at least one operating state to generate an impact pulse for a striking drive of the tool holder 18b.
  • the accessory device 10b comprises a housing unit on which the detent hammer unit 20b is arranged.
  • the tool holder 18b is mounted on the housing unit in an axially movable manner analogous to the previous exemplary embodiment.
  • the tool holder 18b is provided for receiving an insert tool.
  • the tool holder 18b is designed as a chuck.
  • the accessory device 10b comprises a gear unit 30b, which is provided to convert a speed and / or a torque of an output shaft 32a of the handheld power tool into a speed and / or a torque of the tool holder 18b.
  • the gear unit 30b is designed as a two-stage planetary gear and comprises a first gear stage 112b and a further gear stage 114b. It is also conceivable that the gear unit 30b has only a single gear stage.
  • the first gear stage 112b comprises an input sun gear 116b, a planet carrier 118b, a plurality of planetary elements 120b, 122b and a ring gear 124b arranged fixed to the housing.
  • the further gear stage 114b comprises a sun gear 126b connected non-rotatably to the planet carrier 118b of the first gear stage 112b, a planet carrier 130b, a plurality of planetary elements 132b, 134b and a switching ring gear 136b.
  • the transmission unit 30b has two shiftable transmission gears. In a first of the transmission gears, the shift ring gear 136b is fixed to the housing. In the present exemplary embodiment, the switching ring gear 136b has engagement means (not shown in more detail) which are provided in the first gear for a positive connection with the housing unit of the accessory device 10b.
  • the shift ring gear 136b is connected in a rotationally fixed manner to the planet carrier 118b of the first gear stage 112b.
  • the planetary elements 120b, 122b of the further gear stage 112b are in engagement with the switching ring gear 136b.
  • the second gear stage 114b is short-circuited in the further gear.
  • the planet carrier 130b of the further gear stage 114b has the same speed as the sun gear 126b in the further transmission gear.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (17)

  1. Système de machine-outil portative comportant une machine-outil portative (12a), dans lequel la machine-outil portative (12a) présente une unité de boîtier d'outil (58a) dotée d'une interface de machine (64a), et d'un dispositif auxiliaire (10a ; 10b) pouvant être entraîné par la machine-outil portative (12a) et destiné à être disposé sur la machine-outil portative (12a), dans lequel le dispositif auxiliaire (10a ; 10b) présente au moins une unité de couplage (14a), qui est prévue pour le couplage mécanique séparable avec la machine-outil portative (12a), en particulier pour un couplage à un logement d'outil insérable (16a) de la machine-outil portative (12a), et un logement d'outil (18a ; 18b) destiné à recevoir un outil insérable ainsi qu'au moins une unité de percussion à déclic (20a ; 20b), qui est prévue pour produire, dans au moins un état de fonctionnement, une impulsion de percussion pour un entraînement à percussion du logement d'outil (18a ; 18b), caractérisé en ce que l'unité de couplage (14a) est prévue pour relier l'une à l'autre solidement de manière séparable sans outil une unité de boîtier (62a) du dispositif auxiliaire (10a) et l'interface de machine (64a).
  2. Système de machine-outil portative selon la revendication 1, caractérisé en ce que l'unité de percussion à déclic (20a ; 20b) comporte au moins un élément d'entraînement(22a), qui présente une région de liaison (24a), qui peut être reliée en situation d'entraînement à un logement d'outil insérable (16a) de la machine-outil portative (12a).
  3. Système de machine-outil portative selon la revendication 1 ou 2, caractérisé en ce qu'au moins un élément d'entraînement (22a) de l'unité de percussion à déclic (20a ; 20b) est réalisé sous la forme d'une broche, qui peut être reliée, de façon mobile axialement et solidaire en rotation, à un logement d'outil insérable (16a ; 16b) de la machine-outil portative (12a).
  4. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que le logement d'outil (18a ; 18b) recouvre radialement au moins en partie l'unité de percussion à déclic (20a ; 20b).
  5. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de percussion à déclic (20a ; 20b) présente au moins un élément de ressort (26a), qui est prévu pour activer l'entraînement à percussion en fonction d'une pression d'application.
  6. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de percussion à déclic (20a ; 20b) présente au moins une unité de verrouillage (28a) pour une déconnexion de la percussion.
  7. Système de machine-outil portative selon la revendication 6, caractérisé en ce que l'unité de verrouillage (28a) est prévue pour fixer, dans au moins un état de fonctionnement, une position axiale du logement d'outil (18a) par rapport à l'unité de couplage (14a) .
  8. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé par au moins une unité de boîte de vitesses (30b), qui est prévue pour convertir une vitesse de rotation et/ou un couple d'un arbre de sortie de la machine-outil portative en une vitesse de rotation et/ou un couple du logement d'outil (18b) .
  9. Système de machine-outil portative selon la revendication 8, caractérisé en ce que l'unité de boîte de vitesses (30b) présente au moins deux rapports de vitesse commutables.
  10. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'interface de machine (64a) présente un élément de fixation (66a) disposé sur un côté frontal de l'unité de boîtier d'outil (58a), l'élément de fixation (66a) étant réalisé au moins dans certaines parties en forme de douille et/ou en forme d'anneau.
  11. Système de machine-outil portative selon la revendication 10, caractérisé en ce que l'élément de fixation (66a) présente, sur une périphérie extérieure, au moins un élément de blocage (68a) et au moins deux éléments de retenue (70a, 72a), l'élément de blocage (68a) présentant au moins une denture de blocage et les au moins deux éléments de retenue (70a, 72a) étant réalisés à la manière de baïonnettes pour réaliser une liaison à baïonnette.
  12. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'interface de machine (64a) et l'unité de couplage (14a) présentent respectivement une région de complémentarité de forme, les régions de complémentarité de forme étant prévues pour une liaison par complémentarité de forme l'une avec l'autre.
  13. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'interface de machine (64a) et l'unité de couplage (14a) présentent respectivement une région de liaison à force, les régions de liaison à force étant prévues pour une liaison à force l'une avec l'autre.
  14. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de couplage (14a) et l'interface de machine (64a) sont prévues pour s'encliqueter l'une avec l'autre.
  15. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de couplage (14a) et l'interface de machine (64a) forment une liaison à baïonnette.
  16. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de couplage (14a) comprend un élément d'actionnement (74a) qui est prévu pour libérer un encliquetage de l'unité de couplage (14a) avec l'interface de machine (64a) de la machine-outil portative (12a).
  17. Système de machine-outil portative selon l'une des revendications précédentes, caractérisé en ce que l'unité de boîtier (62a) du dispositif auxiliaire (10a ; 10b) présente un élément de boîtier (96a) qui est prévu pour, dans au moins un état de fonctionnement, supporter l'unité de percussion à déclic (20a) contre un logement d'outil insérable (16a) de la machine-outil portative (12a).
EP19167348.2A 2015-02-04 2015-12-30 Système de machine-outil portative comprenant une machine-outil portative et un accessoire Active EP3539725B1 (fr)

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DE102015201921.7A DE102015201921A1 (de) 2015-02-04 2015-02-04 Zubehörvorrichtung
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DE102016214616A1 (de) * 2016-08-05 2018-02-08 Robert Bosch Gmbh Vorsatzvorrichtung
DE102018209307A1 (de) 2017-06-22 2018-12-27 Robert Bosch Gmbh Werkzeugbasismodul
CN114310802B (zh) * 2020-09-29 2024-06-04 莱克电气绿能科技(苏州)有限公司 一种手持式工具机及具有该工具机的手持式电动工具

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US4489792A (en) * 1981-05-28 1984-12-25 Fahim Atef E F Hammer drill adapter
US5711380A (en) * 1996-08-01 1998-01-27 Chen; Yueh Rotate percussion hammer/drill shift device
DE102005048345A1 (de) * 2005-10-10 2007-04-12 Robert Bosch Gmbh Handwerkzeugmaschinenzusatzeinheit
US10259111B2 (en) * 2013-04-03 2019-04-16 Robert Bosch Gmbh Tool attachment for a hand-held power tool
DE102013208882A1 (de) * 2013-05-14 2014-11-20 Robert Bosch Gmbh Handwerkzeugvorrichtung

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EP3053708A1 (fr) 2016-08-10
EP3053708B1 (fr) 2019-05-15
DE102015201921A1 (de) 2016-08-04
CN205799420U (zh) 2016-12-14
EP3539725A1 (fr) 2019-09-18

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