EP3593951A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3593951A1
EP3593951A1 EP18182872.4A EP18182872A EP3593951A1 EP 3593951 A1 EP3593951 A1 EP 3593951A1 EP 18182872 A EP18182872 A EP 18182872A EP 3593951 A1 EP3593951 A1 EP 3593951A1
Authority
EP
European Patent Office
Prior art keywords
pawl
joint
tool
sliding direction
operating button
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.)
Withdrawn
Application number
EP18182872.4A
Other languages
German (de)
English (en)
Inventor
Eric Filip
Jerome Jaromin
Olaf Koch
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP18182872.4A priority Critical patent/EP3593951A1/fr
Priority to EP19733537.5A priority patent/EP3820651B1/fr
Priority to PCT/EP2019/067696 priority patent/WO2020011595A1/fr
Priority to CN201980038885.5A priority patent/CN112262020B/zh
Priority to US17/253,209 priority patent/US11958175B2/en
Publication of EP3593951A1 publication Critical patent/EP3593951A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches
    • B25D2250/261—Means for locking an operative switch on

Definitions

  • the present invention relates to a hand tool, which has a mechanism for locking an operating button in an actuated position.
  • a handheld power tool has a tool holder for holding a tool, a striking mechanism, an electric motor for driving the striking mechanism, a monostable operating button which has a stable switching position and a depressed switching position, and a device control which switches off the electric motor in response to the stable switching position and which activated the electric motor in response to the pressed switch position.
  • a pawl is provided which can be pivoted in a pivoting direction between a releasing position and a locking position, the pawl in the locking position inhibiting the monostable operating button in the depressed switching position.
  • An operating knob can be displaced by the user in a sliding direction perpendicular to the swivel direction. The pawl is attached to the actuating knob via a joint.
  • a backdrop converts a movement of the pawl along the sliding direction into a pivoting movement in the pivoting direction.
  • the latch for locking the operating button is that it is easy to install.
  • the pawl and the associated actuating knob are a structural unit that can be installed in a single assembly step.
  • the associated setting can be part of a housing of the handheld power tool or molded onto the housing.
  • Fig. 1 shows schematically a rotary hammer 1 as an example of a hand-held hand-held power tool .
  • the exemplary rotary hammer 1 has a tool holder 2, in which a tool 3 can be inserted and locked.
  • the tool 3 is, for example, a drill, a chisel, etc.
  • the embodiment shown as an example rotates the tool holder 2 about a working axis 4 and at the same time periodically applies strikes to the tool along the working axis 4 .
  • the handheld power tool 1 can have a mode selection switch 5 , which enables the user to selectively activate and deactivate the rotary movement and selectively the striking operation. The user can put the handheld power tool 1 into operation with a monostable operating button 6 .
  • the handheld power tool 1 has a handle 7.
  • the user can hold and guide the handheld power tool 1 during operation with the handle 7 .
  • the operating button 6 is preferably attached to the handle 7 such that the user can actuate the operating button 6 with the hand gripping the handle 7 .
  • the handle 7 can be decoupled from a machine housing 8 via damping elements.
  • the hand tool 1 has a rotary drive 9 which is coupled to the tool holder 2 .
  • the rotary drive 9 can have, inter alia, a step-down gear 10, a slip clutch 11 .
  • An output shaft 12 of the rotary drive 9 is connected to the tool holder 2 .
  • the rotary drive 9 is coupled to an electric motor 13 .
  • the user can switch the electric motor 13 on and off by actuating the operating button 6 , the operating button 6 correspondingly controlling a power supply for the electric motor 13 .
  • a speed of the electric motor 13 can be set via the operating button 6 .
  • a device controller 14 detects the position of the operating button 6 and controls the electric motor 13 accordingly.
  • the handheld power tool 1 has a pneumatic striking mechanism 15.
  • the pneumatic striking mechanism 15 has an excitation piston 16 and a percussion piston 17.
  • the excitation piston 16 is rigidly coupled to the electric motor 13 .
  • An eccentric wheel 18 and a connecting rod 19 transform the rotational movement of the electric motor 13 into a translational movement on the working axis 4.
  • the excitation piston 16 and the percussion piston 17 close off a pneumatic chamber 20 between them.
  • a radial closure of the pneumatic chamber 20 is given in the embodiment shown by a guide tube 21 which also guides the excitation piston 16 and the percussion piston.
  • the percussion piston can be hollow and the excitation piston 16 is guided in the percussion piston or vice versa.
  • the air enclosed in the pneumatic chamber 20 is compressed and decompressed by the excitation piston 16 .
  • the pressure changes couple the club piston to the movement of the excitation piston 16 , the pneumatic chamber 20 behaves analogously to a spring, hence the name air spring.
  • the percussion piston 17 can strike the tool 3 directly or indirectly via a striker 22 on the tool.
  • the handheld power tool 1 is switched on and off by the operating button 6 .
  • the operating button 6 is arranged in the handle 7 .
  • the operating button 6 has a switch cap 23 which the user can grip. In a rest position of the operating button 6, the switch cap 23 projects from the handle 7 against a switching direction 24 ( Fig. 2 ).
  • the switch cap 23 is preferably in contact with a stop 25 of the machine housing 8 .
  • the user can press the switch cap 23 into a pressed switch position in the switching direction 24 ( Fig. 3 ).
  • the switch cap 23 can slide or swivel into the handle 7 .
  • the switching cap 23 can, as shown in the example shown, be pivoted or linearly guided about a bearing point. The switching cap 23 is removed from the stop 25.
  • the switching cap 23 is acted upon by a restoring element 26, for example a helical spring, with a force which acts counter to the switching direction 24 .
  • the reset element 26 is more tensioned in the depressed switching position than in the rest position, as a result of which the switching cap 23 is stable only in the rest position.
  • the switch cap 23 returns to the rest position when the user releases the switch cap 23 .
  • the switching direction 24 is preferably antiparallel to the working direction 27 in which the tool 3 points.
  • the switching cap 23 is coupled to a switching mechanism 28 of the operating button 6 .
  • the switching mechanism 28 deactivates the electric motor 13 when the switching cap 23 is in the rest position.
  • the switching mechanism 28 activates the electric motor 13 when the switching cap 23 is in the pressed position.
  • the switching mechanism 28 can one include electromechanical, optical, magnetic or other sensor for determining the position of the switch cap 23 .
  • the switching mechanism 28 can set a speed or power consumption of the electric motor 13 as a function of positions pressed to different extents.
  • the handheld power tool 1 has a locking switch 29.
  • the locking switch has a releasing position ( Fig. 2 ) and a locking position ( Fig. 3 ).
  • the locking switch 29 has an actuating knob 30, which can be gripped by the user.
  • the user can move the operating knob 30 between a first position and a second position in the sliding direction 31 .
  • the first position is associated with the releasing position of the locking switch 29 and the second position is associated with the locking position of the locking switch 29 .
  • the sliding direction 31 is preferably antiparallel to the switching direction 24 of the operating button 6.
  • the locking switch 29 has a pivotable pawl 32 which engages in the switching cap 23 in the locking position.
  • the pawl 32 inhibits the movement of the switching cap 23 against the switching direction 24 and thus the return of the switching cap 23 to the rest position.
  • the operating button 6 remains in the pressed switch position.
  • the electric motor 13 remains activated even when the user releases the switch cap 23 .
  • the pawl 32 interacts with the switch cap 23.
  • the switch cap 23 has a locking surface 33, against which the pawl 32 can rest in the locking position.
  • the blocking surface 33 can be realized by the outer contour of the switch cap 23 or by a rib or the like accessible from the outside.
  • the blocking surface 33 is preferably largely perpendicular to the switching direction 24.
  • the blocking surface 33 points counter to the switching direction 24 and towards the pawl 32.
  • the pawl 32 can be pivoted in a pivoting direction 34 , which is perpendicular to the switching direction 24 .
  • the pawl 32 can be pivoted between a first position, which is associated with the releasing position, and a second position, which is associated with the locking position, in the switching direction 24 .
  • the pawl 32 is in the releasing position without an overlap with the locking surface 33.
  • the overlap relates to the switching direction 24, ie the overlap can be determined in the projection onto a plane perpendicular to the switching direction 24 .
  • the pawl 32 is overlapping with the stop 33 in the locking position.
  • a tip 35 of the pawl 32 lies in the switching direction 24 on the Blocked area 33 . Analogously to the gripping hand, the tip 35 exerts a counterforce to the restoring element, as a result of which the operating button 6 remains pressed.
  • the position of the tip 35 along the switching direction 24 corresponds to the position of the stop 33 along the switching direction 24 when the operating button 6 is pressed .
  • the tip 35 can protrude beyond the stop 33 in the switching direction 24 when the operating button 6 is in the rest position.
  • the locking switch 29 has no function when the handheld power tool 1 is switched off.
  • the pawl 32 is resiliently attached to the actuating knob 30 .
  • a joint 36 connects the actuating knob 30 and the pawl 32.
  • the joint 36 can be pivoted about an axis 37 which is perpendicular to the pivoting direction 34 .
  • the joint 36 is preferably designed as a solid-state joint.
  • the hinge 36 is made of the same material as the pawl 32 and preferably as the actuating knob 30.
  • the hinge 36 has a lower stiffness than the pawl 32 in the swivel direction 34. The low stiffness is due to a small thickness, ie a smaller dimension along the swivel direction 34, realized.
  • the hinge 36 can be deformed reversibly, possibly elastically, to such an extent that the pawl 32 can be pivoted between the locking and releasing position.
  • the joint 36 is preferably braced in the locking position and is force-free in the releasing position.
  • a link 38 pivots the pawl 32 in response to the position of the actuating knob 30.
  • the link 38 contains an inclined rail 39 on the machine housing 8.
  • the rail 39 rises along the sliding direction 31 in the pivoting direction 34 .
  • the rail 39 has, relative to the pivoting direction 34, a lower guide surface 40 and an upper guide surface 41.
  • the lower guide surface 40 faces the actuating knob 30 ;
  • the upper guide surface 42 faces away from the actuation knob 30 .
  • the pawl 32 has a lower finger 42 which runs on the lower guide surface 40 and an upper finger 43 which runs on the upper guide surface 42 .
  • the upper finger 43 pulls the pawl 32 in the pivoting direction 34 in order to follow the upper guide surface 41.
  • the lower finger 42 presses to the lower guide surface 40 follow the pawl 32 against the pivoting direction 34.
  • the joint 36 is preferably arranged offset in relation to the link 38 in the sliding direction 31 .
  • the hinge 36 is deflected by a maximum of 10 degrees between the releasing position and the locking position. Among other things, this is made possible by the fact that the pawl 32 is fastened to the actuating knob 30 via the joint 36 and is thereby displaced along the sliding direction 31 with the actuating knob 30 .
  • the actuation knob 30 can have a carrier rod 44 .
  • the support rod 44 is aligned along the sliding direction 31 and suspended movably guided along the sliding direction 31 .
  • the actuation knob 30 is attached to one end of the carrier rod 44 .
  • the actuation knob 30 is mounted on an opening 45 in the machine housing 8 .
  • the other end of the support rod 44 has a head 46 which is movably mounted in an eye 47 along the sliding direction 31 .
  • the eye 47 can be provided, for example, in a plate 48 perpendicular to the sliding direction 31 .
  • the hinge 36 is preferably attached between the actuation knob 30 and the head 46 .
  • the head 46 can have a resilient locking lug 49 ( 4, 5 ).
  • the detent 49 creates a pressure point when the user moves the operating knob 30 between the releasing position and the locking position and vice versa.
  • the resilient locking lug 49 projects unloaded relative to the hollow cross section of the eye 47 .
  • the locking lug 49 is deflected when the locking lug 49 is pushed through the eye 47 .
  • the detent 49 can pivot into a cavity 50 in the head 46 .
  • the detent 49 is biased in the cavity.
  • the pretension ensures that it swivels out of the cavity, as a result of which the locking lug 49 again protrudes from the hollow cross section of the eye 47 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Power Tools In General (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP18182872.4A 2018-07-11 2018-07-11 Machine-outil portative Withdrawn EP3593951A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18182872.4A EP3593951A1 (fr) 2018-07-11 2018-07-11 Machine-outil portative
EP19733537.5A EP3820651B1 (fr) 2018-07-11 2019-07-02 Machine-outil portative
PCT/EP2019/067696 WO2020011595A1 (fr) 2018-07-11 2019-07-02 Machine-outil portative
CN201980038885.5A CN112262020B (zh) 2018-07-11 2019-07-02 手持式工具机
US17/253,209 US11958175B2 (en) 2018-07-11 2019-07-02 Hand-held power tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18182872.4A EP3593951A1 (fr) 2018-07-11 2018-07-11 Machine-outil portative

Publications (1)

Publication Number Publication Date
EP3593951A1 true EP3593951A1 (fr) 2020-01-15

Family

ID=62916525

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18182872.4A Withdrawn EP3593951A1 (fr) 2018-07-11 2018-07-11 Machine-outil portative
EP19733537.5A Active EP3820651B1 (fr) 2018-07-11 2019-07-02 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19733537.5A Active EP3820651B1 (fr) 2018-07-11 2019-07-02 Machine-outil portative

Country Status (4)

Country Link
US (1) US11958175B2 (fr)
EP (2) EP3593951A1 (fr)
CN (1) CN112262020B (fr)
WO (1) WO2020011595A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369207A1 (fr) * 2002-06-06 2003-12-10 HILTI Aktiengesellschaft Commutateur de sélection de mode pour machine-outil électrique
EP1864761A1 (fr) * 2006-06-09 2007-12-12 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'un dispositif de réduction des vibrations
JP2008119755A (ja) * 2006-11-08 2008-05-29 Makita Corp 打撃工具
DE102008041511A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Gerätehauptschalter für elektrische Werkzeugmaschinen, insbesondere Elektrohandwerkzeuge, und ein Elektrohandwerkzeug

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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369207A1 (fr) * 2002-06-06 2003-12-10 HILTI Aktiengesellschaft Commutateur de sélection de mode pour machine-outil électrique
EP1864761A1 (fr) * 2006-06-09 2007-12-12 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'un dispositif de réduction des vibrations
JP2008119755A (ja) * 2006-11-08 2008-05-29 Makita Corp 打撃工具
DE102008041511A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Gerätehauptschalter für elektrische Werkzeugmaschinen, insbesondere Elektrohandwerkzeuge, und ein Elektrohandwerkzeug

Also Published As

Publication number Publication date
WO2020011595A1 (fr) 2020-01-16
US20210114196A1 (en) 2021-04-22
CN112262020A (zh) 2021-01-22
US11958175B2 (en) 2024-04-16
EP3820651B1 (fr) 2022-06-08
CN112262020B (zh) 2023-04-21
EP3820651A1 (fr) 2021-05-19

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