EP3061575A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3061575A1
EP3061575A1 EP16155083.5A EP16155083A EP3061575A1 EP 3061575 A1 EP3061575 A1 EP 3061575A1 EP 16155083 A EP16155083 A EP 16155083A EP 3061575 A1 EP3061575 A1 EP 3061575A1
Authority
EP
European Patent Office
Prior art keywords
metal housing
hand tool
insulating unit
tool according
unit
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
EP16155083.5A
Other languages
German (de)
English (en)
Other versions
EP3061575B1 (fr
Inventor
Ralf Windsheimer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3061575A1 publication Critical patent/EP3061575A1/fr
Application granted granted Critical
Publication of EP3061575B1 publication Critical patent/EP3061575B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • 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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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

  • a handheld power tool in particular a cordless screwdriver, having a motor housing, having an output spindle, having at least one metal housing, which has a receiving area for fastening an additional handle and a connecting area formed integrally with the receiving area to a clearance-free, rotationally fixed connection to the motor housing, and with an insulating unit, which electrically isolates the output spindle and the metal housing in an assembled state against each other.
  • an additional handle can be attached without play to the hand tool. It can be provided a structurally simple and stable mounting option for an additional handle.
  • the additional handle can be structurally simply attached very stable. A user can be particularly effectively protected against a hazardous to a human flow of current and / or a voltage contact. A risk of electric shock by drilling a power line can be minimized. High user comfort and / or high user safety can be achieved.
  • a "hand tool machine” is to be understood as meaning in particular a workpiece-processing machine, but advantageously a cordless screwdriver, a drill, a drill and / or percussion hammer, a screwdriver, a milling cutter, a grinder, an angle grinder, a garden implement and / or a Multifunctional tool understood.
  • a "cordless screwdriver” is to be understood in this context, in particular a network-independent operated screwdriver.
  • the cordless screwdriver preferably has a rechargeable energy storage unit and / or an electrical and mechanical interface to a battery pack with a rechargeable energy storage unit.
  • a “motor housing” is to be understood in this context, in particular a housing, which is for storage of a drive unit for the power tool and / or to protect the drive unit from environmental influences, such as moisture, dirt or dust and / or mechanical loads, such as shocks, is provided.
  • an "output spindle” is to be understood as meaning, in particular, an element for the axial transmission of a rotational movement and / or a torque generated by the drive unit.
  • the output spindle for transmitting a rotational movement and / or torque is provided on a tool holder of the power tool.
  • the output spindle is formed separately from the tool holder.
  • the output spindle and the tool holder are rotatably and electrically connected to each other.
  • a "metal housing” is to be understood in this context, in particular a housing which is intended to receive and / or forward supporting and / or holding forces.
  • the metal housing preferably encloses the output spindle in an assembled state to at least 270 degrees, preferably to at least 300 degrees and particularly preferably to at least 330 degrees.
  • the metal housing is formed as an outer housing.
  • the metal housing has an at least substantially hollow cylindrical shape.
  • the metal housing is at least substantially formed of a light metal alloy with aluminum, magnesium and / or zinc or alternatively formed at least substantially of steel or other suitable to those skilled appearing metal.
  • the receiving area is annular to a fastening of an additional handle.
  • the receiving area is arranged in an assembled state axially overlapping with the output spindle.
  • the receiving area is arranged in a mounted state coaxially to a rotational axis of the output spindle.
  • the receiving area on an outer periphery of a profile to an at least partially positive connection with the auxiliary handle on.
  • the connecting region of the metal housing preferably has at least one receptacle for a bolt connection, preferably for a screw connection to the motor housing.
  • an "insulating unit" is to be understood as meaning in particular a unit made of a solid, electrically non-conductive material, preferably of a plastic.
  • the insulating unit is formed of a polymer such as polyamide, polycarbonate or ABS, a fiber composite or other material that appears suitable to a person skilled in the art.
  • the material of the insulating unit has a dielectric strength of at least 20 kV / mm, preferably of at least 40 kV / mm and more preferably of at least 80 kV / mm.
  • the receiving area for fixing an additional handle axially spaced from the tool holder is arranged.
  • the tool holder on clamping jaws, which are arranged in an assembled state axially spaced from the receiving area. This can further increase protection for a user. It can be provided a particularly safe hand tool. It can be achieved a small diameter of the receiving area and a particularly compact auxiliary handle can be provided.
  • the insulating unit is provided for a rotatable at least radial mounting of the output spindle.
  • the insulating unit preferably has at least one bearing point, preferably at least one further bearing point, which are each provided to transmit a radial force and / or an axial force between the output spindle and the insulation unit.
  • Each of the bearing points preferably has at least one roller bearing, for example a ball bearing or a roller bearing.
  • the insulation unit comprises a transmission housing.
  • a "gearbox" is to be understood as meaning, in particular, a housing which is provided for mounting and / or protecting a gearbox of the handheld power tool coupled to a drive unit.
  • the transmission housing for supporting at least one planetary gear stage of the transmission intended.
  • the insulating unit and the gear housing are integrally formed with each other.
  • the handheld power tool has at least one axial cross-sectional plane in which the insulating unit is arranged radially between the output spindle and the receiving region.
  • the output spindle, the insulating unit and the receiving area are arranged axially overlapping.
  • the metal housing has at least one guide element which is provided to radially support and / or guide the insulation unit.
  • a force of the user can be transferred to the output spindle particularly effectively by means of the auxiliary handle. It can be achieved a particularly simple and / or reliable installation of the power tool.
  • the guide element is provided for radially guiding and / or centering the insulation unit during an assembly process.
  • the handheld power tool preferably has a cross-sectional plane in which the output spindle, the insulating unit, the guide element and the receiving area are arranged.
  • the metal housing has at least one support element, which is provided in an assembled state to support the insulation unit in the axial direction.
  • the insulating unit can be kept in a particularly simple manner in the power tool.
  • the guide element and the support element are integrally formed with each other.
  • the support element preferably forms a connection, which is positive in at least one axial direction, with the insulation unit.
  • the handheld power tool has at least one rolling bearing for rotatably supporting the output spindle, which comprises at least one outer ring which is directly connected to the insulating unit.
  • the output spindle has an axial stop for contact with a bearing ring of the rolling bearing.
  • the insulating unit preferably has an axial stop for contact with a bearing ring of the rolling bearing.
  • the insulating unit projects in an assembled state axially beyond the metal housing.
  • the fact that the insulating unit "projects" beyond the metal housing should in this context be understood in particular to mean that the insulating unit projects beyond the metal housing on the drive side and / or output side with respect to a drive and / or working axis of the handheld power tool.
  • the metal housing can be electrically isolated from the output spindle and / or shielded in a particularly effective manner.
  • a force introduced by a user into the insulating unit by means of the auxiliary handle can be received and / or supported in a particularly effective manner.
  • an axial extent of the metal housing is smaller than an axial extent of the insulating unit.
  • the metal housing comprises at least one stiffening element which extends at least substantially perpendicular to a metal housing axis.
  • a particularly resilient and / or dimensionally stable metal housing can be provided.
  • the at least one stiffening element is formed integrally with the support element.
  • the metal housing preferably has at least one further stiffening element.
  • the hand tool machine comprises a torque coupling, which has a blocking element which is provided in at least one operating state to turn off the torque coupling and to support a blocking force against the metal housing.
  • the blocking element can be structurally supported in the handheld power tool. It can be provided a particularly compact torque coupling.
  • the torque coupling has an adjusting element for setting a maximum torque that can be transmitted to the output spindle, which is arranged axially between the tool holder and the receiving area for the auxiliary handle. As a result, the adjustment can be arranged user-friendly and easy to reach.
  • the insulating unit has at least one insulating element, which electrically isolates the blocking element and the metal housing in an assembled state.
  • the insulating element is provided for contact with the stiffening element of the metal housing. This allows a structurally simple construction of the insulating unit can be achieved.
  • the hand tool according to the invention should not be limited to the application and embodiment described above.
  • the handheld power tool according to the invention may have a different number from a number of individual elements, components and units mentioned herein for performing a function described herein.
  • FIG. 1 shows a system 50 with a hand tool 10, an additional handle 20 and a battery device 52.
  • the system 50 is designed as a hand tool system.
  • the handheld power tool 10 comprises a motor housing 12, an output spindle 14, and a metal housing 16 which has a receiving area 18 for attachment of an auxiliary handle 20 and a connecting area 22 formed integrally with the receiving area 18 to a clearance-free connection with the motor housing 12.
  • the handheld power tool 10 further comprises an insulating unit 24, which electrically isolates the output spindle 14 and the metal housing 16 in an assembled state.
  • the hand tool 10 is formed in the present embodiment as a cordless screwdriver.
  • the hand tool machine 10 is gun-shaped in the present embodiment.
  • the hand tool 10 has a handle housing 54 which forms a handle.
  • the motor housing 12 and the handle housing 54 are integrally formed in the present embodiment.
  • the handle is encompassed by a user for use of the hand tool 10 with at least one hand.
  • the hand tool 10 has a drive and working axis 56 and a handle axis 58.
  • the drive and work axis 56 and the handle axis 58 enclose an angle of about 80 degrees with each other. It is conceivable that the drive and working axis 56 and the handle axis 58 include an angle which has a value in a value range between 60 degrees and 90 degrees or another value that appears appropriate to the person skilled in the art. It is also conceivable that the drive and working axis 56 and the handle axis 58 are arranged in alignment with each other.
  • the hand tool 10 includes a tool holder 60 which is provided for receiving replaceable insert tools, such as screw bits, drills, stirrers, grinding insert tool or cutting tools.
  • the tool holder 60 is formed in the present embodiment as a chuck. It is also conceivable that the tool holder 60 is designed as a polygonal receptacle or a receptacle of another type.
  • the hand tool 10 comprises an electric drive unit 62.
  • the electric drive unit 62 comprises an electric motor.
  • the motor housing 12 includes a receptacle for the electric motor.
  • the motor housing 12 is intended to store the electric motor and to protect against environmental influences, such as dust, moisture and / or mechanical action.
  • the handheld power tool 10 comprises an electrical switching unit 64, which is provided to switch on and / or off the drive unit 62 and / or to set a rotational speed of the drive unit 62 and / or a generated torque of the drive unit 62.
  • the switching unit 64 has an actuator 66 provided for operation by a user.
  • the actuator 66 is formed as a spring-loaded pressure switch.
  • the hand tool 10 comprises a torque coupling 44, which is provided to set a maximum of the drive unit 62 transmitted to the tool holder 60 torque.
  • the torque coupling 44 includes an adjustment ring 68 provided for operation by the user (see FIG. FIG. 2 ).
  • the hand tool 10 comprises a gear unit 70.
  • the gear unit 70 is provided to translate a speed and / or a torque of the drive unit 62 into a rotational speed and / or a rotational speed of the tool holder 60.
  • the transmission unit 70 has a plurality of transmission gears having a different transmission ratio. In the present embodiment, the transmission unit 70 has two gears.
  • the hand tool 10 comprises a gear shift, which is intended to set a gear.
  • the transmission circuit has an actuator 72 which is provided for operation by the user.
  • the actuator 72 is formed in the present embodiment as a sliding element.
  • the actuating element 72 of the transmission circuit is arranged in the present embodiment on a side opposite the handle housing 54 side of the motor housing 12.
  • the hand tool 10 includes a direction of rotation switching, which is intended to set a direction of rotation of the tool holder 60.
  • the direction of rotation switch has an actuator 74, which is provided for operation by the user.
  • the actuating element 74 is formed in the present embodiment as a sliding element.
  • the hand tool 10 is provided for an electrical power supply by the battery device 52.
  • the hand tool 10 has a battery interface unit for coupling to the battery device 52.
  • the battery interface unit for the battery device 52 is arranged on a motor housing 12 remote from the end of the handle housing 54.
  • the battery interface unit is provided to connect a housing of the battery device 52 releasably releasably without tools to the handle housing 54 of the power tool 10.
  • the interface unit is provided for an electrical and mechanical connection of the hand tool 10 with the battery device 52. It is also conceivable that the handheld power tool 10 alternatively or additionally has an electrical power supply to an electrical connection to a power grid.
  • the hand tool 10 comprises an output spindle 14, which is provided to transmit a rotational movement and / or a torque from the gear unit 70 to the tool holder 60.
  • the output spindle 14 is formed separately from the tool holder 60 in the present embodiment.
  • the output spindle 14 is firmly connected to the tool holder 60.
  • the output spindle 14 is arranged centrally in the metal housing 16 in an assembled state.
  • the metal housing 16 has an outer wall 76, which is formed substantially in the form of a hollow cylinder.
  • the metal housing 16 has a metal housing axis 42, which is arranged in a mounted state on the drive and working axis 56.
  • the metal housing 16 is disposed axially relative to the drive and working axis 56 of the power tool 10 between the adjusting ring 68 of the torque coupling 44 and the drive unit 62.
  • the metal housing 16 is arranged axially spaced from the tool holder 60.
  • the metal housing 16 forms a receiving region 18 for attaching the auxiliary handle 20.
  • the receiving region 18 is provided for attachment of the auxiliary handle 20 to the handheld power tool 10 in a non-destructive manner.
  • the auxiliary handle 20 is detachably formed in the present embodiment. It is also conceivable that the receiving area 18 and the additional handle 20 are provided for a permanent connection. The receiving area 18 is provided with an at least rotationally fixed connection of the auxiliary handle 20 with the hand tool 10.
  • the receiving region 18 is formed in the form of a substantially cylindrical wall.
  • the auxiliary handle 20 has a coupling unit 78 and a grip area 80.
  • the receiving region 18 of the metal housing 16 and the coupling unit 78 are intended to cooperate to a rotationally fixed attachment of the auxiliary handle 20 to the power tool 10.
  • the coupling unit 78 has a sleeve 82, which comprises the receiving area 18 in an assembled state.
  • the receiving area 18 has an encircling groove 84 on an outer circumference, which is provided for guiding the collar 82 of the auxiliary handle 20.
  • the receiving region 18 has on the outer circumference on a wave profile 86, which is provided for a rotationally fixed connection of the sleeve 82 with the receiving area 18.
  • the collar 82 has engagement means formed corresponding to the groove 84 and the corrugated profile 86 and which are intended to cooperate with the groove 84 and the corrugated profile 86 to a rotationally fixed connection of the auxiliary handle 20 with the power tool 10.
  • the auxiliary handle 20 comprises a shaft 88.
  • the shaft 88 has an axle 90 which, in an assembled state, is at least substantially perpendicular to the drive shaft. and working axis 56 is arranged.
  • the coupling unit 78 and the receiving area 18 are provided to arrange the auxiliary handle 20 with respect to a circumferential direction of the drive and working axis 56 at a selectable angle. In the present embodiment, the angle is selectable in steps of about 10 degrees. It is also conceivable that the outer periphery of the receiving area 18 is smooth and the angle is arbitrary.
  • the auxiliary handle 20 has, at an end remote from the coupling unit 78, the grip region 80, which a user comprises for use of the handheld power tool 10 with at least one hand.
  • the auxiliary handle 20 has a guard ring 92 which is arranged transversely to an axis 90 of the shaft 88. The guard ring 92 limits the grip area 80 of the auxiliary handle 20 in the direction of the coupling unit 78.
  • the connecting region 22 of the metal housing 16 is provided with a circumferentially positive connection with the motor housing 12.
  • the connecting portion 22 is provided to be screwed to the motor housing 12.
  • the connecting region 22 has a plurality of screw receptacles 94, 96, which are arranged distributed along the outer circumference of the metal housing 16.
  • the screw connection is intended to exert an axial force against the working direction of the metal housing 16.
  • the insulating unit 24 is formed of an electrically non-conductive plastic.
  • the insulating unit 24 is formed in the present embodiment of a polyamide (see. FIG. 3 ).
  • the plastic of the insulating unit 24 has a dielectric strength of 25 kV / mm.
  • the insulating unit 24 is provided for a rotatable radial mounting of the output spindle 14.
  • the transmission unit 70 is formed in the present embodiment as a planetary gear unit.
  • the transmission unit 70 includes a transmission housing 26 and a plurality of planetary gear stages 98, 100, 102.
  • the isolation unit 24 includes the transmission housing 26.
  • the isolation unit 24 and the transmission housing 26 are integrally formed.
  • the transmission unit 70 in the present embodiment comprises three planetary gear stages 98, 100, 102.
  • the planetary gear stages 98, 100, 102 are arranged in an axial direction successively between the drive unit 62 and the tool holder 60.
  • a first one of the planetary gear stages 98 is designed as a drive-side planetary gear stage 98.
  • the first of the planetary gear stages 98 includes a sun gear 104, a plurality of planetary elements 106, a ring gear 108 and a planet carrier 110.
  • the planetary elements 106 are rotatably mounted on the planet carrier 110.
  • the ring gear 108 of the first planetary gear stage 98 is formed in the present embodiment as a gear cover and bolted to the transmission housing 26.
  • the ring gear 108 has a motor-side collar, which forms an axial stop for the drive unit 62.
  • Another of the planetary gear stages 100 is formed as a central planetary gear stage 100.
  • the further planetary gear stage 100 comprises a sun gear 112 which is formed integrally with the planet carrier 110 of the first planetary gear stage 98, a plurality of planetary elements 114, a ring gear 116 and a planet carrier 118.
  • the planetary elements 114 are rotatably arranged on the planet carrier 118.
  • the ring gear 116 of the further planetary gear stage 100 is formed in the present embodiment as a switching ring gear.
  • the switching ring gear is mounted axially movable in the gear housing 26.
  • a third of the planetary gear stages 102 is formed as a driven-side planetary gear stage 102.
  • the third planetary gear stages 102 includes a sun gear 120 integrally formed with the planet carrier 118 of the other planetary gear stage 100, a plurality of planetary elements 122, a ring gear 124, and a planetary carrier 126.
  • the planetary elements 122 are rotatably mounted on the planet carrier 126.
  • the planet carrier 126 is rotatably connected to the output spindle 14.
  • the gear unit 70 has a cylindrical locking sleeve 128 which, in an assembled state, surrounds the planet carrier 110 of the first planetary gear stage 98 and the further planetary gear stage 100.
  • the gear unit 70 comprises a friction disk 130, which is arranged in the axial direction between the planet carrier 110 of the second planetary gear stage 100 and the planetary elements 122 of the third planetary gear stage 102.
  • the friction plate 130 is provided to transmit an axial force of the torque coupling 44 to the locking sleeve 128.
  • the friction plate 130 is provided to guide the planetary elements 122 of the third planetary gear stage 102.
  • the ring gear 116 of the further planetary gear stage 100 designed as a switching ring gear has two switching positions which respectively correspond to one of the gearings of the gear unit 70 and one of two axial positions. In a first of the switching positions, which corresponds to a first of the gears, the ring gear 116 is arranged close to the output.
  • the ring gear 116 has on its outer periphery engaging means which engage in the first switching position in the locking sleeve 128 and lock the ring gear 116 fixed to the housing.
  • the planetary elements 122 of the further planetary gear stage 100 roll in this switching position of the ring gear 116 on the ring gear 116 from.
  • the ring gear 116 is rotatably mounted.
  • the second switching position formed as a switching ring gear ring gear 116 bridges the other planetary gear 100th
  • the hand tool housing device has an axial cross-sectional plane in which the insulation unit 24 is arranged radially between 60 of the output spindle 14 and the receiving region 18.
  • the insulating unit 24 is arranged over an entire axial extent of the receiving area 18 radially between the output spindle 14 and the receiving area 18.
  • the insulating unit 24 completely surrounds the output spindle 14 in a region of the receiving region 18.
  • the metal housing 16 has in the present embodiment, three guide elements 28, which are each provided to support the insulating unit 24 radially and lead.
  • the guide elements 28 are provided in an assembled state to support the insulating unit 24 radially and center.
  • the guide elements 28 are provided to guide and center the insulation unit 24 during a mounting operation.
  • the guide elements 28 are formed integrally with the receiving area 18.
  • the guide elements 28 are each formed on an inner side of the receiving area 18.
  • the guide elements 28 extend radially inwardly from the inside of the receiving area 18.
  • the guide elements 28 each have a radially inwardly directed contact surface 132, which is provided at a mounting and / or in an assembled state for contact with an outer periphery of the insulating unit 24.
  • the hand tool housing device has an axial cross-sectional plane in which the output spindle 14, the insulating unit 24, the guide element 28 and the receiving area 18 are arranged.
  • the metal housing 16 has three support elements 30, which are provided in an assembled state to support the insulation unit 24 in the axial direction.
  • the support elements 30 are each formed integrally with the guide elements 28.
  • the support members 30 each have an axially aligned contact surface 134 which in an assembled state with the Isolation unit 24 is in contact.
  • the contact surfaces 134 are each formed in the form of circular ring sections.
  • the support elements 30 engage at least on one side in an outer periphery of the insulating unit 24.
  • the insulating unit 24 has at least one support element 136, which is intended to cooperate with the support elements 30 of the metal housing 16.
  • the support element 136 of the insulating unit 24 is formed in the present embodiment as an annular plastic rib which is integrally formed on a base body of the insulating unit 24.
  • the support element 136 is formed integrally with the base body of the insulation unit 24.
  • the support member 136 is formed in the form of a ring on an outer periphery of the main body. It is conceivable that the insulating unit 24 has a plurality of support elements, which are each formed as a ring portion.
  • the support element 136 of the insulation unit 24 has a plurality of axially aligned contact surfaces 138 which are each provided to cooperate with the axially aligned contact surfaces 134 of the support members 30 of the metal housing 16 for a power transmission.
  • the insulating unit 24 has a gear storage area and a spindle bearing area.
  • the gear storage area and the spindle bearing area are arranged axially adjacent to each other.
  • the spindle bearing region has a receptacle for the torque coupling 44.
  • the isolating unit 24 has two bearing points 140, 142 in the spindle bearing area for a rotatable mounting of the output spindle 14.
  • the hand tool 10 has in the present embodiment, two roller bearings 32, 34 for rotatably supporting the output spindle 14, each comprising an outer ring 36, 38 which is directly connected to the insulating unit 24.
  • the rolling bearings 32, 34 are each formed in the present embodiment as a ball bearing.
  • a first of the rolling bearings 32 is arranged on a driven-side end of the insulating unit 24.
  • the output spindle 14 has an axial stop 144.
  • the first rolling bearing 32 has an inner ring 146, which is connected in an assembled state with the output spindle 14.
  • the axial stop 144 of the output spindle 14 is in an assembled state in contact with the inner ring 146 of the first rolling bearing 32.
  • the insulating unit 24 has an axial contact surface, which is in an assembled state in contact with the outer ring 36 of the first bearing 32.
  • the first rolling bearing 32 is provided to transmit an axial and / or a radial force from the output spindle 14 to the insulating unit 24.
  • roller bearings 34 is disposed on a drive side end of the spindle bearing portion.
  • the further rolling bearing 34 is arranged directly adjacent to the planet carrier 126 of the third planetary gear stage 102.
  • the first rolling bearing 32 and the other rolling bearing 34 are formed analogous to each other.
  • the further rolling bearing 34 has an inner ring 148, which is directly connected to the output spindle 14.
  • Insulating unit 24 projects axially beyond metal housing 16 in an assembled state.
  • the axial extension of the insulating unit 24 is greater than an axial extent of the metal housing 16.
  • the insulating unit 24 protrudes on the output side beyond the metal housing 16 addition.
  • the insulating unit 24 protrudes on the drive side beyond the metal housing 16.
  • the metal housing 16 is arranged axially overlapping with the spindle bearing area and the gear storage area of the insulating unit 24.
  • the receiving area 18 of the metal housing 16 for the auxiliary handle 20 encloses the spindle bearing area of the insulating unit 24.
  • the metal housing 16 in the present embodiment comprises three stiffening elements 40 which extend at least substantially perpendicular to the metal housing axis 42.
  • the stiffening elements 40 are arranged on an inner circumference of the outer wall 76 of the metal housing 16 and each extend radially inwardly and in the circumferential direction.
  • the stiffening elements 40 are each formed in the form of circular ring segments.
  • the stiffening elements 40 are formed integrally with the guide elements 28.
  • the stiffening elements 40 are intended to receive deformation forces acting on the metal housing 16.
  • the torque coupling 44 has a plurality of spring elements 150, 152, 154 and a pressure plate 156.
  • the spring elements 150, 152, 154 are provided to exert an axial spring force on the pressure plate 156.
  • the torque coupling 44 further includes an actuator 158 which is provided to cooperate with the adjustment ring 68 of the torque coupling 44 and to adjust a bias of the spring elements 150, 152, 154.
  • the pressure plate 156 is mounted axially movable on the insulating unit 24.
  • the pressure plate 156 is in the form of a circular ring and comprises six inner segments, each forming a contact surface for the spring elements 150, 152, 154.
  • the pressure plate is arranged coaxially to the drive and working axis 56 of the power tool 10.
  • the torque coupling 44 includes a blocking element 46 and an actuator 160 for the blocking element 46.
  • the actuating element 160 covers the pressure plate 156.
  • the blocking element 46 is provided in an operating state to cut off the torque coupling 44 and a blocking force to support against the metal housing 16.
  • the blocking element 46 is intended to limit an axial movement of the pressure plate 156.
  • the blocking element 46 is provided to lock the pressure plate 156 in the axial direction.
  • the actuating element 160 is designed as a cylinder jacket.
  • the actuating element 160 is arranged in the axial direction between the blocking element 46 and the metal housing 16.
  • the actuating element 160 is arranged in the axial direction between the pressure plate 156 and the metal housing 16.
  • the insulating unit 24 has at least one insulating element 48, which electrically isolates the blocking element 46 and the metal housing 16 in an assembled state.
  • the insulating member 48 is integrally formed with the support member 136 of the insulating unit 24 in the present embodiment.
  • the insulating element 48 is formed in the present embodiment as an annular plastic rib which is integrally formed on a base body of the insulating unit 24.
  • the insulating element 48 of the insulating unit 24 has a plurality of output side aligned contact surfaces 138, which are each provided for contact with axially aligned contact surfaces 162 of the support members 30 of the metal housing 16.
  • the insulating element 48 of the insulating unit 24 has a drive-side aligned contact surface 162, which is provided for contact with the blocking element 46.
  • the insulating element 48 is arranged in the axial direction between the support elements 30 of the metal housing 16 and the blocking element 46.
  • the receiving area 18 for the auxiliary handle 20 covers the insulating element 48 in a mounted state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Drilling And Boring (AREA)
EP16155083.5A 2015-02-27 2016-02-10 Machine-outil portative Active EP3061575B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015203575.1A DE102015203575A1 (de) 2015-02-27 2015-02-27 Handwerkzeugmaschine

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DE102017218668A1 (de) * 2017-10-19 2019-04-25 Robert Bosch Gmbh Handwerkzeugmaschine
CN109909961B (zh) * 2017-12-13 2021-10-15 宝时得科技（中国）有限公司 手持式动力工具
SE1930193A1 (en) * 2019-06-14 2020-12-15 Atlas Copco Ind Technique Ab TORQUE TRANSFERRING DEVICE FOR USE WITH A POWER TOOL
DE102020210824A1 (de) 2020-08-27 2022-03-03 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einem schaltbaren Getriebe
WO2022204118A1 (fr) 2021-03-25 2022-09-29 Milwaukee Electric Tool Corporation Poignée latérale pour outil électrique

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US3873863A (en) * 1974-02-25 1975-03-25 Singer Co Double insulated electrically powered hand tool and coupler therefor
US5765652A (en) * 1996-07-05 1998-06-16 Ryobi North America, Inc. Universal joint for a motorized implement
EP1382421A2 (fr) * 2002-07-16 2004-01-21 Black & Decker Inc. Perceuse sans fil à capot métallique
DE10313372A1 (de) * 2003-03-26 2004-10-14 Hilti Ag Elektrohandwerkzeugmaschine mit Planetengetriebe
DE102013210749A1 (de) * 2012-11-27 2014-05-28 Robert Bosch Gmbh System mit einem Zusatzhandgriff und einem Handwerkzeug
DE102012223717A1 (de) * 2012-12-19 2014-06-26 Robert Bosch Gmbh Handwerkzeugmaschine

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US20160250744A1 (en) 2016-09-01
EP3061575B1 (fr) 2018-01-31
CN105922204A (zh) 2016-09-07
DE102015203575A1 (de) 2016-09-01
CN105922204B (zh) 2021-07-30

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