EP3581337A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3581337A1
EP3581337A1 EP18177018.1A EP18177018A EP3581337A1 EP 3581337 A1 EP3581337 A1 EP 3581337A1 EP 18177018 A EP18177018 A EP 18177018A EP 3581337 A1 EP3581337 A1 EP 3581337A1
Authority
EP
European Patent Office
Prior art keywords
pawl
operating button
sliding
switching
locking
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Withdrawn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
EP18177018.1A
Other languages
German (de)
English (en)
Inventor
Daniela Lachica Koch
Markus Sommer
Walter Martinez De Virgala Kalitta
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 EP18177018.1A priority Critical patent/EP3581337A1/fr
Priority to PCT/EP2019/064822 priority patent/WO2019238529A1/fr
Priority to US17/049,691 priority patent/US11858102B2/en
Priority to EP19727703.1A priority patent/EP3802000A1/fr
Priority to CN201980033930.8A priority patent/CN112203803B/zh
Publication of EP3581337A1 publication Critical patent/EP3581337A1/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Withdrawn legal-status Critical Current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
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches
    • 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
    • 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
    • B25D2250/265—Trigger mechanism in handle

Definitions

  • the present invention relates to a chiseling hand machine tool.
  • the handheld power tool has a locking switch, which enables continuous operation without the user having to hold down an operating button.
  • the hand-held power tool has a striking mechanism, an electric motor for driving the striking mechanism and a monostable operating button which has a stable switching position and a depressed switching position.
  • a device control switches off the electric motor in response to the stable switching position or activates the electric motor in response to the depressed switching position.
  • a locking switch has a sliding direction, an actuating knob, a pawl and a sliding block, the actuating knob being displaceable by the user along the sliding direction from a releasing position to a locking position.
  • the pawl can be pivoted between a first position and a second position in a pivoting direction perpendicular to the switching direction.
  • the pawl is disengaged from the operating button in the first position and the pawl engages the operating button in the second position, inhibiting the operating button in the depressed position.
  • the pawl has, on a side pointing in the pivoting direction, a link surface which is inclined with respect to the sliding direction.
  • the sliding block lies in the releasing position on the sliding surface.
  • the sliding block releases the pawl from the engagement with the operating button in the releasing position.
  • the switching mechanism is robust against the effects of dust and wear.
  • the pawl has a spring, by means of which the pawl is acted upon counter to the pivoting direction.
  • the spring works in the same direction as the sliding block.
  • the pawl can have a side pointing counter to the pivoting direction, on which a link surface which is further inclined with respect to the sliding direction is provided, and a finger is rigidly connected to the actuating knob, the finger resting on the further link surface.
  • the monostable operating button can have a reset element which prestresses the operating button against the switching direction.
  • the monostable operating button can have a switch cap which can be gripped by a user and which has a locking surface which interacts with the pawl.
  • the sliding block can be in the second position of the pawl out of engagement with the sliding surface.
  • 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 strikes it 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 .
  • the handheld power tool 1 has a pneumatic hammer mechanism 14.
  • the pneumatic hammer mechanism 14 has an exciter piston 15 and a hammer piston 16.
  • the exciter piston 15 is rigidly coupled to the electric motor 13 .
  • An eccentric wheel 17 and a connecting rod 18 transform the rotational movement of the electric motor 13 into a translational movement on the working axis 4.
  • the excitation piston 15 and the percussion piston 16 close off a pneumatic chamber 19 between them.
  • a radial closure of the pneumatic chamber 19 is given in the embodiment shown by a guide tube 20 which also guides the excitation piston 15 and the percussion piston.
  • the percussion piston can be hollow and the excitation piston 15 is guided in the percussion piston or vice versa.
  • the air enclosed in the pneumatic chamber 19 is compressed and decompressed by the excitation piston 15 .
  • the pressure changes couple the club piston to the movement of the excitation piston 15 , the pneumatic chamber 19 behaves analogously to a spring, hence the name air spring.
  • the percussion piston 16 can strike the tool 3 directly or indirectly via a striker 21 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 22 which the user can grip. In a rest position of the operating button 6, the switch cap 22 projects from the handle 7 against a switching direction 23 ( Fig. 2 ).
  • the switch cap 22 preferably abuts a stop 24 of the machine housing 8 .
  • the user can press the switch cap 22 in the switching direction 23 into a pressed switch position ( Fig. 3 ).
  • the switch cap 22 can slide or swivel into the handle 7 .
  • the switch cap 22 can, as shown in the example shown, be pivoted or linearly guided about a bearing point. The switching cap 22 is removed from the stop 24.
  • the switching cap 22 is acted upon by a restoring element 25, for example a helical spring, with a force which acts counter to the switching direction 23 .
  • the restoring element 25 is more tensioned in the depressed switching position than in the rest position, as a result of which the switching cap 22 is stable only in the rest position.
  • the switch cap 22 returns to the rest position when the user releases the switch cap 22 .
  • the switching direction 23 is preferably antiparallel to the working direction 26 in which the tool 3 points.
  • the switching cap 22 is coupled to a switching mechanism 27 of the operating button 6 .
  • the switching mechanism 27 deactivates the electric motor 13 when the switching cap 22 is in the rest position.
  • the switching mechanism 27 activates the electric motor 13 when the switching cap 22 is in the pressed position.
  • Switch mechanism 27 may include an electromechanical, optical, magnetic, or other sensor for determining the position of switch cap 22 .
  • the switching mechanism 27 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 28.
  • the locking switch has a releasing position ( Fig. 2 ; Fig. 3 ) and a locking position ( Fig. 4 ).
  • the locking switch 28 has a pivotable pawl 29 which engages in the locking cap 22 in the locking position.
  • the pawl 29 inhibits the movement of the switching cap 22 against the switching direction 23 and thus the return of the switching cap 22 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 22 .
  • the pawl 29 interacts with the switch cap 22.
  • the switch cap 22 has a locking surface 30 against which the pawl 29 can rest in the locking position.
  • the blocking surface 30 can be by the outer contour of the switch cap 22 or by an externally accessible Rib or the like can be realized.
  • the blocking surface 30 is preferably largely perpendicular to the switching direction 23. The blocking surface 30 points counter to the switching direction 23 and towards the pawl 29.
  • the pawl 29 is pivotable in a pivoting direction 31 , which is perpendicular to the switching direction 23 .
  • the pawl 29 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 23 .
  • the pawl 29 is in the releasing position without an overlap with the locking surface 30.
  • the overlap relates to the switching direction 23, ie the overlap can be determined in the projection onto a plane perpendicular to the switching direction 23 .
  • the pawl 29 is overlapping with the locking surface 30 in the locking position.
  • a tip 32 of the pawl 29 is in the switching direction 23 on the locking surface 30 . Analogously to the gripping hand, the tip 32 exerts a counterforce to the restoring element, as a result of which the operating button 6 remains pressed.
  • the position of the tip 32 along the switching direction 23 corresponds to the position of the blocking surface 30 along the switching direction 23 when the operating button 6 is pressed .
  • the tip 32 can protrude beyond the blocking surface 30 in the switching direction 23 when the operating button 6 is in the rest position.
  • the locking switch 28 has no function when the handheld power tool 1 is switched off.
  • the pawl 29 is suspended, for example, from an elastic spring 33 .
  • the spring 33 can be realized, for example, by a leaf spring which is connected to the machine housing 8 at one end 34 .
  • the spring 33 exerts a force acting against the pivoting direction 31 on the pawl 29 .
  • the spring 33 can be relaxed, ie free of force, in the releasing position.
  • the spring 33 is tensioned more in the locking position than in the releasing position.
  • the pawl 29 has a tendency to move automatically from the locking position to the releasing position.
  • the locking switch 28 has an actuating knob 35 which can be gripped by the user. The user can move the actuation knob 35 between a first position and a second position in the sliding direction 36 . The first position is associated with the releasing position of the locking switch 28 and the second position is associated with the locking position of the locking switch 28 .
  • the sliding direction 36 is preferably parallel to the switching direction 23 of the operating button 6.
  • a link 37 couples the actuating knob 35 to the pawl 29.
  • the link 37 has an upper side with an inclined link surface 38.
  • the upper side points counter to the pivoting direction 31, for example facing the actuating knob 35 .
  • the inclined link surface 38 is inclined with respect to the switching direction 23 .
  • the inclined link surface 38 is preferably inclined in the releasing position and the locking position with respect to the switching direction 23 .
  • the inclined link surface 38 drops along the switching direction 23 in the pivoting direction 31 .
  • the actuating knob 35 has a finger 39 which presses against the inclined link surface 38 .
  • the finger 39 moves the link 37 in the pivoting direction 31 when the actuating knob 35 is moved into the locking position.
  • the pawl 29 can be biased by the spring 33 against the finger 39 , both in the releasing position and in the locking position. The pawl 29 automatically returns from the locking position to the releasing position when the contact pressure exerted by the finger 39 decreases as it moves along the inclined link surface 38 .
  • the link 37 has a lower side with an inclined link surface 40.
  • the lower side points in the pivoting direction 31, for example facing away from the actuating knob 35 .
  • the inclined link surface 40 is inclined with respect to the switching direction 23 .
  • the inclined link surface 40 rises along the switching direction 23 in the pivoting direction 31 .
  • the inclined link surface 40 is preferably inclined in the releasing position and the locking position with respect to the switching direction 23 .
  • the actuating knob 35 has a sliding block 41, which can engage behind the sliding block 37 on the inclined sliding surface 40 .
  • the sliding block 41 can lift the pawl 29 from the locking position to support the spring 33 .
  • the pawl 29, the link 37 and the spring 33 are preferably realized as a leaf spring.
  • Fig. 7 shows the backdrop 37 and the pawl 29 in a view of the lower side.
  • the position of the locking switch 28 corresponds to the Fig. 4 .
  • the sliding block 41 is preferably not in engagement with the sliding block 37.
  • the sliding block 41 is engaged, for example, by a narrower section 42 of the sliding block 37 .
  • the narrower section 42 for example a recess in the leaf spring, adjoins the inclined link surface 40 .
  • the sliding block 40 laterally overlaps the sliding block 41. Accordingly, the sliding block 41 can bear against the sliding block 40 in the releasing position, as in FIG Fig. 3 and Fig. 5 illustrated.
  • the narrower section 42 forms an opening in which the sliding block 41 lies, does not touch the sliding surface 40 .
  • the arrangement and dimensions of the narrower section 42 are selected such that the sliding block 41 does not overlap with the section 42 when the locking switch 28 is in the locking position (cf. Fig. 6 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP18177018.1A 2018-06-11 2018-06-11 Machine-outil portative Withdrawn EP3581337A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18177018.1A EP3581337A1 (fr) 2018-06-11 2018-06-11 Machine-outil portative
PCT/EP2019/064822 WO2019238529A1 (fr) 2018-06-11 2019-06-06 Machine-outil portative
US17/049,691 US11858102B2 (en) 2018-06-11 2019-06-06 Hand-held power tool
EP19727703.1A EP3802000A1 (fr) 2018-06-11 2019-06-06 Machine-outil portative
CN201980033930.8A CN112203803B (zh) 2018-06-11 2019-06-06 手持式工具机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18177018.1A EP3581337A1 (fr) 2018-06-11 2018-06-11 Machine-outil portative

Publications (1)

Publication Number Publication Date
EP3581337A1 true EP3581337A1 (fr) 2019-12-18

Family

ID=62599496

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18177018.1A Withdrawn EP3581337A1 (fr) 2018-06-11 2018-06-11 Machine-outil portative
EP19727703.1A Pending EP3802000A1 (fr) 2018-06-11 2019-06-06 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19727703.1A Pending EP3802000A1 (fr) 2018-06-11 2019-06-06 Machine-outil portative

Country Status (4)

Country Link
US (1) US11858102B2 (fr)
EP (2) EP3581337A1 (fr)
CN (1) CN112203803B (fr)
WO (1) WO2019238529A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033843A1 (de) * 2004-07-13 2006-02-09 Robert Bosch Gmbh Vorrichtung zum Blockieren eines zweiten Schaltelements einer Handwerkzeugmaschine
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
EP2207191A2 (fr) * 2009-01-09 2010-07-14 Makita Corporation Dispositifs de commutation pour outils électriques
EP2746008A1 (fr) * 2012-12-22 2014-06-25 Andreas Stihl AG & Co. KG Outillage portatif doté d'un moteur d'entraînement d'au moins un outil et son procédé de fonctionnement

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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033843A1 (de) * 2004-07-13 2006-02-09 Robert Bosch Gmbh Vorrichtung zum Blockieren eines zweiten Schaltelements einer Handwerkzeugmaschine
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
EP2207191A2 (fr) * 2009-01-09 2010-07-14 Makita Corporation Dispositifs de commutation pour outils électriques
EP2746008A1 (fr) * 2012-12-22 2014-06-25 Andreas Stihl AG & Co. KG Outillage portatif doté d'un moteur d'entraînement d'au moins un outil et son procédé de fonctionnement

Also Published As

Publication number Publication date
US11858102B2 (en) 2024-01-02
WO2019238529A1 (fr) 2019-12-19
CN112203803B (zh) 2023-07-18
CN112203803A (zh) 2021-01-08
EP3802000A1 (fr) 2021-04-14
US20210245348A1 (en) 2021-08-12

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