EP3802000B1 - Machine-outil portative - Google Patents

Machine-outil portative

Info

Publication number
EP3802000B1
EP3802000B1 EP19727703.1A EP19727703A EP3802000B1 EP 3802000 B1 EP3802000 B1 EP 3802000B1 EP 19727703 A EP19727703 A EP 19727703A EP 3802000 B1 EP3802000 B1 EP 3802000B1
Authority
EP
European Patent Office
Prior art keywords
switching
catch
operating button
power tool
hand
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.)
Active
Application number
EP19727703.1A
Other languages
German (de)
English (en)
Other versions
EP3802000A1 (fr
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
Publication of EP3802000A1 publication Critical patent/EP3802000A1/fr
Application granted granted Critical
Publication of EP3802000B1 publication Critical patent/EP3802000B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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-held power tool.
  • the hand-held power tool has a locking switch that enables continuous operation without the user having to constantly hold down a power button.
  • EP1864761 A1 discloses a hand-held power tool according to the preamble of claim 1.
  • the handheld power tool has a percussion mechanism, an electric motor for driving the percussion mechanism, and a monostable operating button having a stable switching position and a pressed switching position.
  • a device control switches the electric motor off in response to the stable switching position and activates the electric motor in response to the pressed switching position.
  • a locking switch has a sliding direction, an actuating knob, a pawl, and a sliding block, wherein the actuating knob can be moved by the user along the sliding direction from a releasing position to a locking position.
  • the pawl is pivotable between a first position and a second position in a pivoting direction perpendicular to the switching direction.
  • the pawl In the first position, the pawl is disengaged from the operating button, and in the second position, the pawl engages the operating button, inhibiting the operating button in the pressed position.
  • the pawl On a side facing in the pivoting direction, the pawl has a sliding surface inclined relative to the sliding direction. In the released position, the sliding block rests against the sliding surface.
  • the sliding block releases the latch from the operating button.
  • the switching mechanism is robust against dust and wear.
  • the latch has a spring that applies force to the latch in the opposite direction to the pivoting direction.
  • the spring acts in the same direction as the sliding block.
  • the latch may have a side facing opposite to the pivoting direction, on which a further inclined guide surface is provided relative to the sliding direction, and a finger is rigidly connected to the actuating knob, the finger resting against the further guide surface.
  • the monostable operating button can have a reset element which biases the operating button against the switching direction.
  • the monostable operating button may have a switch cap graspable by a user, which has a locking surface interacting with the latch.
  • the sliding block In the second position of the latch, the sliding block may be disengaged from the sliding surface.
  • Fig. 1 shows schematically as an example of a hand-held power tool a hammer drill 1.
  • the exemplary hammer drill 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 exemplary embodiment shown rotates the tool holder 2 about a working axis 4 and at the same time periodically exerts blows on the Tool along the working axis 4.
  • the handheld power tool 1 can have a mode selector switch 5 , which allows the user to selectively activate and deactivate the rotary movement and the percussive operation.
  • the user can start the handheld power tool 1 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 using the handle 7.
  • the operating button 6 is 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 handheld power tool 1 has a rotary drive 9, which is coupled to the tool holder 2.
  • the rotary drive 9 can include, among other things, a reduction gear 10 and 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 pressing the operating button 6 , with the operating button 6 correspondingly controlling a power supply to the electric motor 13.
  • a speed of the electric motor 13 can be adjusted via the operating button 6 .
  • the handheld power tool 1 has a pneumatic percussion mechanism 14.
  • the pneumatic percussion mechanism 14 has an excitation piston 15 and a percussion piston 16.
  • the excitation piston 15 is rigidly coupled to the electric motor 13.
  • An eccentric gear 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 define a pneumatic chamber 19 between them.
  • a radial closure of the pneumatic chamber 19 is provided by a guide tube 20 , which simultaneously 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 impact piston to the movement of the excitation piston 15 ; the pneumatic chamber 19 behaves analogously to a spring, hence the name air spring.
  • the impact piston 16 can impact the tool 3 directly or indirectly via a striker 21 .
  • the hand-held 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 grasp. In a rest position of the operating button 6 , the switch cap 22 protrudes from the handle 7 opposite a switching direction 23 ( Fig. 2 ).
  • the switching cap 22 preferably rests against a stop 24 of the machine housing 8.
  • the user can press the switching cap 22 in the switching direction 23 into a depressed switching position ( Fig. 3 ).
  • the switching cap 22 can slide into the handle 7 or pivot in.
  • the switching cap 22 can be pivoted about a bearing point or guided linearly, as shown in the example shown.
  • the switching cap 22 is away from the stop 24.
  • the switching cap 22 is subjected to a force by a return element 25, e.g. a coil spring, which acts counter to the switching direction 23.
  • the return element 25 is more strongly tensioned in the pressed switching position than in the rest position, as a result of which the switching cap 22 is only stable in the rest position.
  • the switching cap 22 returns to the rest position when the user releases the switching cap 22.
  • the switching direction 23 is preferably anti-parallel 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.
  • the switching mechanism 27 can include an electromechanical, optical, magnetic, or other sensor for determining the position of the switching cap 22. In one embodiment, the switching mechanism 27 can adjust a speed or power consumption of the electric motor 13 depending on different pressed positions.
  • the hand tool 1 has a locking switch 28.
  • the locking switch has a release position ( Fig. 2 ; Fig. 3 ) and a locking position ( Fig. 4
  • the locking switch 28 has a pivoting latch 29, which engages the switching cap 22 in the locked position.
  • the latch 29 inhibits the movement of the switching cap 22 opposite to the switching direction 23 and thus prevents the switching cap 22 from returning to its rest position.
  • the operating button 6 remains in the pressed switching position.
  • the electric motor 13 remains activated even if the user releases the switching cap 22 .
  • the pawl 29 interacts with the switching cap 22.
  • the switching cap 22 has a locking surface 30 against which the pawl 29 can rest in the locked position.
  • the locking surface 30 can be formed by the outer contour of the switching cap 22 or by an externally accessible Rib or similar.
  • the locking surface 30 is preferably largely perpendicular to the switching direction 23.
  • the locking surface 30 points opposite to the switching direction 23 and toward 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 in the switching direction 23 between a first position, which is associated with the releasing position, and a second position, which is associated with the locking position.
  • the pawl 29 does not overlap with the locking surface 30.
  • the overlap relates to the switching direction 23, i.e. the overlap can be determined in the projection onto a plane perpendicular to the switching direction 23.
  • the pawl 29 overlaps with the locking surface 30.
  • a tip 32 of the pawl 29 rests against the locking surface 30 in the switching direction 23. The tip 32 exerts a counterforce to the return element, analogous to the gripping hand, whereby the operating button 6 remains pressed.
  • the position of the tip 32 along the switching direction 23 corresponds to the position of the locking surface 30 along the switching direction 23 when the operating button 6 is pressed.
  • the tip 32 can protrude beyond the locking surface 30 in the switching direction 23 when the operating button 6 is in the rest position.
  • the locking switch 28 is inoperative when the hand-held power tool 1 is switched off.
  • the pawl 29 is suspended, for example, from an elastic spring 33.
  • the spring 33 can be implemented, for example, as a leaf spring, which is connected at one end 34 to the machine housing 8.
  • the spring 33 exerts a force on the pawl 29 that acts counter to the pivoting direction 31.
  • the spring 33 can be relaxed, i.e., force-free, in the released position.
  • the spring 33 is more strongly tensioned in the locked position than in the released position.
  • the pawl 29 has a tendency to move automatically from the locked position to the released position.
  • the locking switch 28 has an actuating knob 35, which is grippable by the user. The user can move the actuating knob 35 between a first position and a second position in the sliding direction 36. The first position is associated with the release 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 latch 29.
  • the link 37 has an upper side with an inclined link surface 38.
  • the upper side points opposite to the pivoting direction 31, e.g., is facing the actuating knob 35.
  • the inclined link surface 38 is inclined relative to the switching direction 23.
  • the inclined link surface 38 is preferably inclined relative to the switching direction 23 in the releasing position and the locking position.
  • the inclined link surface 38 slopes downwards 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, preloaded by the spring 33 can press against the finger 39 , both in the releasing position and 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 during its movement along the inclined guide surface 38 .
  • the link 37 has a lower side with an inclined link surface 40.
  • the lower side points in the pivoting direction 31, e.g., is 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 with respect to the switching direction 23 in the releasing position and the locking position.
  • the actuating knob 35 has a link block 41 which can engage behind the link 37 and rest against the inclined link surface 40.
  • the link 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 implemented as a leaf spring.
  • Fig. 7 shows the gate 37 and the latch 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 engaged with the link 37.
  • the engagement of the sliding block 41 is realized, for example, by a narrower section 42 of the link 37.
  • the narrower section 42 for example a recess in the leaf spring, borders the inclined link surface 40.
  • the link surface 40 overlaps laterally with the sliding block 41. Accordingly, the sliding block 41 can rest against the link surface 40 in the released position, as in Fig. 3 and Fig. 5 illustrated.
  • the narrower section 42 forms an opening in which the sliding block 41 , when lying, 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 (see. Fig. 6 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Power Tools In General (AREA)

Claims (5)

  1. Machine-outil portative comportant
    un mécanisme de percussion (14),
    un moteur électrique (13) permettant d'entraîner le mécanisme de percussion (14),
    un bouton-poussoir de fonctionnement (6) monostable qui présente une position de commutation stable et une position de commutation enfoncée,
    une commande d'appareil qui, en réponse à la position de commutation stable, désactive le moteur électrique (13) et qui, en réponse à la position de commutation enfoncée, active le moteur électrique (13),
    un interrupteur d'arrêt (28) qui présente un sens de déplacement (36), un pommeau d'actionnement (35), un cliquet (29) et un coulisseau (41), dans laquelle le pommeau d'actionnement (35) peut être déplacé par l'utilisateur le long du sens de déplacement (36) d'une position de libération à une position d'arrêt, dans laquelle
    le cliquet (29) peut pivoter dans un sens de pivotement (31) perpendiculaire au sens de commutation (23) entre une première position et une seconde position, dans laquelle le cliquet (29) est hors de prise avec le bouton-poussoir de fonctionnement (6) dans la première position et le cliquet (29) est en prise avec le bouton-poussoir de fonctionnement (6) dans la seconde position en bloquant le bouton-poussoir de fonctionnement (6) dans la position enfoncée,
    dans laquelle le cliquet (29) présente, sur un côté orienté dans le sens de pivotement (31), une surface de coulisse (40) inclinée par rapport au sens de déplacement (36),
    caractérisée en ce que le coulisseau (41) est relié de manière rigide au pommeau d'actionnement (35) et s'appuie contre la surface de coulisse (40) dans la position de libération.
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que le cliquet (29) présente un ressort (33) au moyen duquel le cliquet (29) est sollicité par une force dans le sens opposé au sens de pivotement (31).
  3. Machine-outil portative (1) selon la revendication 1 ou 2, caractérisée en ce que le cliquet (29) présente un côté orienté à l'opposé du sens de pivotement (31) sur lequel est prévue une autre surface de coulisse (38) inclinée par rapport au sens de déplacement (36), et un doigt (39) est relié de manière rigide au pommeau d'actionnement (35), dans laquelle le doigt (39) s'appuie sur l'autre surface de coulisse (38).
  4. Machine-outil portative (1) selon l'une des revendications précédentes, caractérisée en ce que le bouton-poussoir de fonctionnement (6) monostable présente un élément de rappel (25) qui précontraint le bouton-poussoir de fonctionnement (6) dans le sens opposé au sens de commutation (23). Machine-outil portative (1) selon l'une des revendications précédentes, caractérisée en ce que le bouton-poussoir de fonctionnement (6) monostable présente un capuchon de commutation (22) pouvant être saisi par un utilisateur, lequel capuchon présente une surface de blocage (30) interagissant avec le cliquet (29).
  5. Machine-outil portative (1) selon l'une des revendications précédentes, caractérisée en ce que le coulisseau (41) est hors de prise avec la surface de coulisse (40) dans la seconde position du cliquet (29).
EP19727703.1A 2018-06-11 2019-06-06 Machine-outil portative Active EP3802000B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP3802000A1 EP3802000A1 (fr) 2021-04-14
EP3802000B1 true EP3802000B1 (fr) 2025-08-06

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 Active EP3802000B1 (fr) 2018-06-11 2019-06-06 Machine-outil portative

Family Applications Before (1)

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

Country Status (4)

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

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CN112038137B (zh) * 2020-09-23 2025-05-23 格力博(江苏)股份有限公司 开关组件及电动工具
USD1034128S1 (en) * 2022-02-07 2024-07-09 Robert Bosch Gmbh Hammer drill

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Also Published As

Publication number Publication date
CN112203803A (zh) 2021-01-08
US11858102B2 (en) 2024-01-02
EP3581337A1 (fr) 2019-12-18
WO2019238529A1 (fr) 2019-12-19
EP3802000A1 (fr) 2021-04-14
CN112203803B (zh) 2023-07-18
US20210245348A1 (en) 2021-08-12

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