EP3313622B1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3313622B1
EP3313622B1 EP16724000.1A EP16724000A EP3313622B1 EP 3313622 B1 EP3313622 B1 EP 3313622B1 EP 16724000 A EP16724000 A EP 16724000A EP 3313622 B1 EP3313622 B1 EP 3313622B1
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EP
European Patent Office
Prior art keywords
power tool
hand
held power
user
gearbox
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
EP16724000.1A
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German (de)
English (en)
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EP3313622A1 (fr
Inventor
Rudolf Fuchs
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
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Filing date
Publication date
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Publication of EP3313622A1 publication Critical patent/EP3313622A1/fr
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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
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the invention relates to a hand-held power tool, in particular an electric hand-held power tool, with a controllable drive machine which is/can be connected to a tool to be driven by a transmission device, the transmission device having a manual transmission with at least two different gears and a controllable, controllable percussion mechanism, and with at least one by one User-operated control device for operating the hand tool.
  • the invention relates to a method for operating such a handheld power tool.
  • Hand-held power tools and methods for operating them are known in principle from the prior art.
  • the EP 2 671 682 A2 an electric hand drill with an electric motor as the driving machine, which is connected to a tool holder by a gearbox.
  • the transmission has at least one transmission stage, which converts the speed provided by the drive machine into a tool speed.
  • the user has a control device in the form of a pressure switch available, by means of which the user can continuously request or set a desired speed or a desired torque for the electric hand-held power tool.
  • Hand-held power tools are often designed in such a way that they can perform a number of different power tool functions. That's the way it is known to use a hand drill as a hand screwdriver.
  • the transmission as a manual transmission in order to be able to provide a high tool torque with the same drive power when switching from a drilling mode to a screwing mode instead of high tool speeds.
  • the user is able to select or set the desired gear of the transmission by means of a further switch.
  • the user can use a further switch to change the direction of rotation of the tool or tool holder by actuating this switch either to select a corresponding gear of the transmission or to operate the drive machine in reverse.
  • an electric hand-held power tool which has a manual transmission with a shift actuator which automatically changes a transmission ratio of the manual transmission as a function of a detected torque. This takes place independently of a setting made by the user.
  • Other examples are from the DE2933355A1 and US4540318A disclosed.
  • the handheld power tool according to the invention with the features of claim 1 has the advantage that the user no longer has to make the different settings himself, but only has to specify the desired operating mode or the desired operating mode, while the handheld power tool makes the settings necessary to fulfill this operating mode itself.
  • the control device has an actuatable selector switch for selecting one of a number of predetermined operating modes and, depending on actuation of the selector switch, controls the drive motor, the manual transmission and the percussion mechanism.
  • the control device is therefore designed to preset the main components of the handheld power tool depending on the selected operating mode, so that the user sets the handheld power tool to the optimal state for the desired operation with just one switching specification.
  • the control device has the selector switch and a pressure switch for requesting a desired torque and/or a desired speed.
  • the function of the selector switch has already been described above.
  • the control device expediently has the pressure switch, which is embodied, for example, as an actuating lever or slide, in order in particular to request a desired torque and/or a desired rotational speed steplessly.
  • the control device only has the selector switch and the pressure switch, so that these are the only actuating devices of the hand-held power tool, so that the use of the hand-held power tool is particularly simple for the user.
  • At least a first gear of the gear causes a clockwise rotation and at least a second gear of the gear a counter-clockwise rotation of the tool.
  • the gears of the manual transmission differ in terms of a torque and/or speed ratio.
  • the output speed or the tool speed can be influenced in relation to the drive speed by operating the gearbox.
  • the transmission is assigned an electrical, in particular an electric motor or electromagnetic transmission actuator for setting or changing the gears. Provision is therefore made for the transmission to be actuated by an electric transmission actuator.
  • the transmission actuator By selecting the desired operating mode by means of the control device, the transmission actuator enables the manual transmission to be actuated easily and reliably in order to implement the desired operating mode.
  • the hammer mechanism is assigned an electrical coupling actuator for coupling or decoupling the hammer mechanism in order to activate or deactivate it.
  • the percussion mechanism can thus also be activated or deactivated electrically.
  • the coupling actuator is controlled in order to couple or decouple the percussion mechanism from the drive train of the hand-held power tool, in particular from the transmission device, in accordance with the selected operating mode. If an impact drilling mode is selected as the operating mode, it is provided that the coupling actuator couples or activates the impact mechanism.
  • one of the operating modes drilling, percussion drilling and screwdriving can be selected using the selector switch.
  • one of the operating modes drilling, percussion drilling, left-hand screws and right-hand screws can be selected with the selector switch.
  • the selector switch by operating the selector switch, the user can set all the changes necessary for the operation with a simple operation.
  • a further actuating switch is provided, by means of which the user can select between left-hand screws and right-hand screws in the case of the screw operating mode.
  • control device has a display unit that displays the available operating modes to the user.
  • the display unit which is designed as a screen or display, thus shows the user which operating modes he can select from.
  • the control device can be easily adapted to different handheld power tools in terms of software, for example.
  • the display device is in this respect designed as a touch-sensitive screen (touch screen), so that the user can select one of the displayed operating modes in a particularly simple manner. By touching the display device, the user is able to select one of several operating modes.
  • the operating modes can be assigned, for example, a virtually represented operable selector switch, the User can operate by touch.
  • the touch-sensitive display device itself forms the selector switch, with the different operating modes preferably being displayed as pictograms on the display device, so that the user selects the operating mode associated with this pictogram by tapping on one of the pictograms.
  • the control device has means for influencing the selected operating mode.
  • the selected operating mode can be further influenced by the means, for example, as already mentioned, in order to choose between counterclockwise rotation and clockwise rotation. It is also conceivable for the means to specify a maximum speed or maximum torque.
  • the means are displayed to the user in particular by the touch-sensitive announcement device, so that he can select and set them in a simple manner.
  • control device preferably has means for manually setting the operating modes.
  • the user is thus given the opportunity to cancel the pre-selection of an operating mode and to make the desired settings manually or personally.
  • the user can cancel the operating mode selection by tapping and holding down the selector switch or a previously selected icon. It is also conceivable that the operating mode selection is canceled when the user actuates the corresponding icon or the selector switch several times, in particular twice, within a predetermined time interval.
  • the display unit only displays further operating options for selection when an operating mode selection has been canceled or the means have been actuated. So only when the user has canceled the operating mode selection further operating functions are displayed to him by the display unit.
  • the display of the display unit is therefore simple in that in particular only the operating modes that can be selected are displayed.
  • the user wishes to set operating parameters manually or personally, he can cancel the operating mode selection and several, in particular all possible adjustable operating parameters of the handheld power tool are displayed to him in such a way that he can select them individually and set them as desired.
  • the method according to the invention with the features of claim 11 is characterized in that the user is provided with a plurality of operating modes by means of an actuatable selector switch, and that depending on the operating mode selected by means of the selector switch, the engine, the manual transmission and the impact mechanism are controlled.
  • FIG 1 shows a simplified representation of a handheld power tool 1, which is designed as an electric handheld power tool.
  • the hand-held power tool 1 has a housing 2 which is designed in the shape of a pistol and has a handle section 3 and a tool section 4 has, wherein the tool portion 4 and handle portion 3 are aligned substantially perpendicular to each other.
  • an electric motor 5 is arranged as a drive machine.
  • the electric motor 5 is operatively connected to a tool holder 7 in the form of a chuck by means of a gearbox 6 .
  • the tool holder 7 is designed to hold a screwing, drilling or percussion drilling tool 8 .
  • a pressure switch 9 is arranged on the handle section 3, which can in particular be moved steplessly from an initial position to an end position by a user, in particular against the force of a return spring, in order to generate a speed and/or a torque from the electric motor 5 to request.
  • the user can thus control the speed and the torque of the hand-held power tool 1 by actuating the pressure switch 9 .
  • the energy required for the operation of the electric motor 5 is provided by an energy storage module 10 that is detachably attached to the end of the handle section 9 .
  • the hand-held power tool 1 also has an impact mechanism 20 which can be operatively connected to the drive motor or to the electric motor 5 .
  • the percussion mechanism 20 can be coupled to the gearbox via an actuatable clutch.
  • the percussion mechanism 20 and the manual transmission 6 together form a transmission device of the hand-held power tool 1.
  • the advantageous hand-held power tool 1 also has a display device 11 which has a touch-sensitive screen 12 (touch screen), which in the present case is arranged on the upper side of the housing 2 on the tool section 4 .
  • a touch-sensitive screen 12 touch screen
  • figure 2 shows a plan view of the display device 11 according to a first embodiment.
  • the display device 11 displays a number of pictograms 13, 14, 15, 16 and 17 on the screen 12.
  • the icon 13 shows two arrows pointing in opposite directions.
  • the arrows indicate the direction of rotation of the tool 8, the arrow showing the currently set direction of rotation preferably being marked in color, in particular having a colored background.
  • the arrows are aligned in such a way that they extend parallel to the longitudinal extension of the tool section 4 and in this respect point towards the workpiece or in the opposite direction.
  • the forward-pointing arrow has a green background.
  • the arrow pointing to the tool has a colored background, so that the pictogram indicates that the tool 8 rotates clockwise during a screwing process in order to drive a screw into the workpiece.
  • Icon 14 shows a torque limit switch between a large and a small screw.
  • the small screw means a small torque and the large screw means a large torque. It is also provided here that, for example, it is marked in color whether a high or low torque limit is set.
  • the pictograms 15, 16, 17 each indicate an operating mode in simplified form.
  • Pictogram 15 shows a drill bit against a background intended to represent stone grain. To this extent, the pictogram 15 indicates the operating mode “impact drilling”.
  • the pictogram 16 shows a drill bit against a background of wood. The pictogram 16 thus indicates a "drilling" operating mode.
  • the pictogram 17 shows a screw and thus represents a pictogram for the "screws" operating mode.
  • the pictograms 15 to 17, and also the pictograms 13 and 14 can be optically designed differently.
  • the representations described here merely represent exemplary possibilities for realizing the invention.
  • the display device 11 and the pressure switch 9 together form a control device 18 of the handheld power tool 1.
  • the user By actuating or touching one of the pictograms 15, 16, 17, the user selects a desired operating mode of the handheld power tool 1. According to the present exemplary embodiment, he can choose between screwing, drilling and percussion drilling.
  • the pictograms 15, 16 and 17 together a selector switch 22 for selecting the desired mode of operation.
  • the handheld power tool 1 is designed in such a way that all the basic settings of the handheld power tool 1 are adapted to this desired operating mode by selecting the desired operating mode.
  • the transmission 6 is assigned a transmission actuator 19 which is operated electrically.
  • the transmission actuator 19 is designed, for example, as an electric motor or electromagnetic actuator, which is controlled by the control device 18 depending on the selected operating mode in order to engage a gear of the manual transmission that is advantageous for the respective operating mode.
  • a coupling actuator 21, which is operated electrically, is preferably assigned to the clutch.
  • the coupling actuator is in the form of an electromotive or electromagnetic actuator which is controlled by the control device 18 .
  • the control device 18 controls the transmission actuator 19 and the coupling actuator 21 to do so to connect or disconnect the impact mechanism and, if necessary, to change a gear of the manual transmission 6.
  • the handheld power tool 1 thus automatically adjusts the handheld power tool 1 to the task to be performed and displayed by the user.
  • the user After selecting the operating mode, the user only has to request a speed or a torque of the electric motor 5 by actuating the pressure switch in order to carry out the desired machining process. This provides the user with a handheld power tool 1 that is particularly easy to operate.
  • the user only has to actuate the selector switch 22 in order to have all settings, such as changing a gear or coupling or decoupling the percussion mechanism 20 and/or setting a maximum torque or the like, made automatically by the control device 18 .
  • the direction of rotation of the electric motor 5 and/or the tool holder 7 is also automatically set by the control device, either by engaging a corresponding gear of the transmission or by reversing the direction when the electric motor 5 is activated.
  • the user selects the "screwing" operating mode he also has the option of changing the direction of rotation of the tool 8 or the tool holder 7 by actuating the pictogram 13 .
  • the user can fine-tune the preset operating mode or adapt it to his needs.
  • the pictogram 14 torque limit switch
  • the user can specify a maximum torque to be set, for example, in order to avoid thread breakage, particularly during a screwing process.
  • the selected operating mode or the selected pictogram 15, 16, 17 is also advantageously marked in color to make orientation easier for the user.
  • the display device 11 provides the user with further execution options depending on a selected operating mode. For example, if the user has selected the "Drilling" operating mode, as in figure 3 shown, further pictograms 22, 23 and 24 are displayed which represent different materials, so that the user can automatically set a tool speed and/or torque advantageous for the respective material by tapping on one of the pictograms 22, 23 and 24.
  • a pictogram 25 representing a gear selector switch 26 is also displayed. By actuating the gear selector switch 26, the user can manually control or actuate the transmission 6 in order, for example, to set a first gear 1 or a second gear 2 from two available gears with different gear ratios.
  • the transmission actuator 19 By actuating the gear selector switch 26, the transmission actuator 19 is controlled in order to set the corresponding gear of the manual transmission 6.
  • the pictograms 22 to 24 can also be used, for example, to give the user the opportunity to switch the percussion mechanism 20 on or off or to switch it on or off to the drive train of the hand-held power tool decouple, so that the user can manually switch on the percussion mechanism 20 if necessary.
  • the pictograms 22 to 26 are automatically displayed to avoid a manual To provide setting of the hand tool 1 by the user. If, on the other hand, the user has selected one of the operating modes using the selector switch for the icons 15, 16, 17, the other icons for manual setting are hidden. Depending on the selected operating mode, helpful additional pictograms for influencing the respective operating mode, such as pictogram 13 or 14, can be displayed. This enables the user to operate hand-held power tool 1 in a particularly simple manner.
  • the control device 18 expediently has a control unit with a microprocessor or an integrated circuit.
  • figure 4 shows a further exemplary embodiment of the handheld power tool 1 in a simplified detailed view.
  • figure 4 shows a section of the hand-held power tool 1, with the transmission 6 and the transmission actuator 19 being shown in simplified form.
  • the control device 18 is arranged on the outside of the housing 2 of the hand-held power tool 1 and offers the user a choice of different operating modes.
  • the display unit 11 is connected to the previously mentioned control unit 23 which, on the one hand, controls the display unit 11 and, on the other hand, detects the control commands and actuates or controls the transmission actuator 19 and the coupling actuator 21 .
  • a direct switch 24 is arranged on the housing 2 and is connected to the actuator 19 .
  • the direct switch 24 which is designed, for example, as a touch-sensitive or pressure-sensitive switch
  • the user can control the actuator 19 directly and, in particular, bypass or overwrite the specifications of the control device 18. This allows a user, for example, in situations where which a quick adjustment of the operating mode is necessary to disable or enable the actuator 19, especially during operation.
  • the display device 11 adapts the display to the respective operating mode, machine settings that have already been selected or preset can be hidden if they are not required, so that the display is kept clear for the user.
  • the icon 13 is activated or displayed to give the user the choice between clockwise rotation and counterclockwise rotation.
  • the clockwise or counterclockwise rotation is expediently already preselected.
  • a torque limitation is active, as already explained above.
  • the control device 18 controls the manual transmission 6 in such a way that it is set to a higher output speed or to a slow output speed.
  • the manual transmission has two gears, between which a selection can be made accordingly in order to set a higher or lower output speed.
  • the hand-held power tool 1 has only the control device 18 and optionally the direct switch 24 .
  • the electric motor is actuated or switched for clockwise rotation and the impact mechanism is coupled.
  • the electronic torque limitation or setting is preferably switched off.
  • the Torque limit set to a value greater than 60% of the maximum value to resolve the torque limit.
  • the gearbox 6 is set to a gear that provides either a slower or faster output speed. If the gear with the higher speed is selected, the torque limitation is preferably deactivated, as already mentioned. The user can also specify the desired limit torque manually by actuating the torque limit switch 14 .
  • the control device 18 activates the clockwise rotation of the hand-held power tool 1, with the torque limitation in particular being deactivated or set to a value greater than 60% of the maximum value. Furthermore, the control device 18 controls the gearbox 6 in such a way that a gear with a higher or slower speed is set, in particular as a function of the workpiece to be machined or as specified by the user.
  • While the present exemplary embodiment relates to a hand-held power tool 1 with a manual transmission 6 that has only two gears, it is of course also possible to provide a manual transmission 6 with more than just two gears. In particular, as already mentioned above, a change of direction can also be integrated into the manual transmission 6 as an additional gear.

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

Claims (11)

  1. Machine-outil à main (1), en particulier machine-outil à main électrique, comprenant une machine d'entraînement (5) pouvant être pilotée et qui est/peut être reliée à un outil à entraîner (8) par un dispositif de transmission, dans laquelle le dispositif de transmission présente un mécanisme de transmission (6) pouvant être piloté et ayant au moins deux vitesses différentes et un mécanisme de percussion (20) pouvant être piloté, et comprenant un dispositif de commande (18) pouvant être actionné par un utilisateur pour faire fonctionner la machine-outil à main (1), dans laquelle le dispositif de commande (18) présente un commutateur sélecteur (22) pouvant être actionné pour sélectionner l'un parmi plusieurs modes de fonctionnement prédéfinis et pilote la machine d'entraînement (5), le mécanisme de transmission (6) et le mécanisme de percussion (20) en fonction d'un actionnement du commutateur sélecteur (22),
    caractérisée en ce qu'un actionneur de transmission pouvant être piloté électriquement et servant à régler les vitesses est associé au mécanisme de transmission (6).
  2. Machine-outil à main selon la revendication 1, caractérisée en ce que le dispositif de commande (18) présente le commutateur sélecteur (22) et un interrupteur à pression (9) qui sert à demander un couple souhaité et/ou une vitesse de rotation souhaitée.
  3. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une première vitesse du mécanisme de transmission (6) provoque une marche à droite et au moins une deuxième vitesse du mécanisme de transmission (6) provoque une marche à gauche de l'outil.
  4. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que les vitesses du mécanisme de transmission (6) se distinguent par un rapport de couple et/ou un rapport de vitesse de rotation.
  5. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un actionneur de couplage (21) pouvant être piloté électriquement et servant à coupler ou découpler le mécanisme de percussion (6) en vue de l'activation ou de la désactivation de celui-ci est associé au mécanisme de percussion (26).
  6. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le commutateur sélecteur (22) permet de sélectionner l'un des modes de fonctionnement perçage, perçage à percussion et vissage.
  7. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de commande (18) présente un dispositif d'affichage (11) qui affiche les modes de fonctionnement disponibles pour l'utilisateur.
  8. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif d'affichage (11) est réalisé de manière tactile et constitue ou représente le commutateur sélecteur (22).
  9. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de commande (18) présente des moyens pour influencer le mode de fonctionnement sélectionné.
  10. Machine-outil à main selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de commande (18) présente des moyens pour le réglage manuel des modes de fonctionnement.
  11. Procédé permettant de faire fonctionner une machine-outil à main (1), en particulier une machine-outil à main électrique, comprenant une machine d'entraînement (5) pouvant être pilotée et qui est/peut être reliée par un dispositif de transmission à un outil à entraîner (8), dans lequel le dispositif de transmission présente un mécanisme de transmission (6) ayant au moins deux vitesses différentes, et un mécanisme de percussion (20) pouvant être activé, dans lequel plusieurs modes de fonctionnement sont proposés au choix à un utilisateur au moyen d'un commutateur sélecteur (22) pouvant être actionné, et en fonction du mode de fonctionnement sélectionné au moyen du commutateur sélecteur (22), la machine d'entraînement (5), le mécanisme de transmission (6) et le mécanisme de percussion (20) sont pilotés,
    caractérisé en ce qu'un actionneur de transmission pouvant être piloté électriquement et servant à régler les vitesses est associé au mécanisme de transmission (6) .
EP16724000.1A 2015-06-24 2016-05-12 Machine-outil portative Active EP3313622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015211700.6A DE102015211700A1 (de) 2015-06-24 2015-06-24 Handwerkzeugmaschine
PCT/EP2016/060678 WO2016206861A1 (fr) 2015-06-24 2016-05-12 Machine-outil portative

Publications (2)

Publication Number Publication Date
EP3313622A1 EP3313622A1 (fr) 2018-05-02
EP3313622B1 true EP3313622B1 (fr) 2023-02-15

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EP (1) EP3313622B1 (fr)
DE (1) DE102015211700A1 (fr)
WO (1) WO2016206861A1 (fr)

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DE102015211700A1 (de) 2016-12-29
EP3313622A1 (fr) 2018-05-02
WO2016206861A1 (fr) 2016-12-29

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