EP3050676B1 - Outil à main avec feedback amélioré - Google Patents

Outil à main avec feedback amélioré Download PDF

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Publication number
EP3050676B1
EP3050676B1 EP15153381.7A EP15153381A EP3050676B1 EP 3050676 B1 EP3050676 B1 EP 3050676B1 EP 15153381 A EP15153381 A EP 15153381A EP 3050676 B1 EP3050676 B1 EP 3050676B1
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EP
European Patent Office
Prior art keywords
hand tool
speed
protection circuit
user
function
Prior art date
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EP15153381.7A
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German (de)
English (en)
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EP3050676A1 (fr
Inventor
Ludovic Tournier
Christian Ricordi
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Illinois Tool Works Inc
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Illinois Tool Works Inc
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Priority to EP15153381.7A priority Critical patent/EP3050676B1/fr
Priority to PCT/US2015/065582 priority patent/WO2016122788A1/fr
Publication of EP3050676A1 publication Critical patent/EP3050676A1/fr
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    • 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

Definitions

  • This invention relates to a power hand tool, used for construction works, especially to electric hand tools having a powered rotational shaft, like e.g. a drill hammer, whereby the hand tool comprises protection means for protecting the user from dangerous situations, for example if the drill bit of a drilling tool has got stuck within the material to be drilled.
  • the prior art EP 1 201 373 B1 describes a safety circuit for generating a control signal when the future angle of deflection of the casing of an at least partly rotary electric hand tool is exceeded.
  • a rate of rotation sensor directly measuring the rotational speed is connected for signal transmission purposes to a comparing element.
  • the derived control signal after comparison with a predetermined threshold value, interrupts the current path of the electrical drive via at least one of a controllable power cut-out switch and a controllable clutch unit that interrupts the power flux from the electrical drive to the tool spindle.
  • the prior art WO 2006/045072 A2 describes a control system for use in a power tool, including a rotational rate sensor having a resonating mass and a controller electrically connected to the rotational rate sensor.
  • the rotational rate sensor detects lateral displacement of the resonating mass and generates a signal indicative of the detected lateral displacement, such that lateral displacement is directly proportional to a rotational speed at which the power tool rotates about an axis of the rotary shaft.
  • the controller Based on the generated signal, the controller initiates a protective operation (e.g. pulsing the motor) to avoid undesirable rotation of the power tool.
  • a second protective operation e.g. disengaging the motor from the rotary shaft, which is different than the first protective operation, may be performed.
  • a power hand tool having a rotational shaft driven by a driving unit
  • the hand tool comprises a sensor for detecting a movement of a housing (preferably the rotational shaft is held by the housing), a speed control unit for controlling the speed of the rotational shaft and a protection circuit set up to control the speed control unit for protecting a user of the hand tool based on the detected movement, wherein the protection circuit is set up to decrease the speed of the rotational shaft (preferably via the speed control unit) by a variable amount to different speed levels above zero, wherein the variable amount is depending on the amount of the detected movement.
  • the object of the invention is also preferably achieved by a control method for a power hand tool having a rotational shaft driven by a driving unit, comprising the steps:
  • the amount of one specific protective operation i.e.: reduction of the speed
  • the speed is not only shut down, but the speed is decreased in multiple levels (digitally continuous) or continuously.
  • the user is able to adapt to the tool better and he may learn how to prevent critical situations better. This is giving the user the chance to change the use of the tool so as to prevent a critical situation and the user may then just continue working.
  • the housing may begin to shake
  • the function f may cause a gentle decrease of the speed depending on the amount the housing is shaking, signaling the user that he will approach a critical situation. He is tilting the tool further and the speed of the rotational shaft is therefore reduced further.
  • he not only realizes that there is some need for correcting the current operation of the tool, but he may also, because of the different speed levels, perceive an information into which direction a corrective movement should be made to prevent or to get out of the critical state.
  • a power hand tool may preferably be understood as tool that a user has to hold with one or two hands and that uses power to perform a work operation at some object.
  • the power is electric power.
  • the tool is for example an electric screw driver, angle or surface grinder, wall chaser.
  • Preferably it is a drilling tool or combined drill-hammer-tool.
  • the tool may be grid or battery powered.
  • a housing of the hand tool may preferably be understood as the elements covering electric and/or turning parts of the hand tool.
  • the housing preferably comprises one or more areas for manually gripping the hand tool.
  • a rotational shaft driven by a driving unit may preferably be understood as the piece of the hand tool that is turned by the driving unit (e.g., a motor, preferably electric motor) and that is transmitting the work power to the work piece, preferably via a drill bit or saw blade or the like.
  • the driving unit e.g., a motor, preferably electric motor
  • a sensor for detecting a movement of the housing may preferably be understood as a configuration for optically/mechanically or electromechanically sensing a movement of the housing and providing a, preferably electric, signal proportional to the movement.
  • a movement of the housing is an acceleration or a difference of the absolute orientation compared to a reference orientation, particularly preferably it is the velocity of change of orientation of the housing or a rotation rate.
  • the sensor is a Coriolis force based sensor, measuring the velocity of the change of orientation of the housing.
  • a detection according to the invention is preferably a detection of an amount of the movement and not only a detection of the fact, whether a movement is taking place or not. Detecting may therefore be understood as measuring or sensing an amount of a movement.
  • the sensor may be attached to a battery of the power hand tool.
  • a speed control unit for controlling the speed of the rotational shaft may preferably be understood as one or more components set up for having a steerable impact (increase/decrease) on the speed and/or the torque of the rotational shaft.
  • Such components may comprise a break, the motor (engine), a clutch, an open- or closed-loop controller connected to one or more of those components.
  • a protection circuit set up to control the speed control unit may preferably be understood as an electronic circuit (analog or digital) connected to the speed control unit.
  • the protection circuit may be attached to a battery of the power hand tool.
  • Decreasing the speed by a variable amount to different speed levels above zero may preferably be understood as: starting from a normal speed, not affected by the protection circuit, the speed is lowered to one lower speed level and then to at least one even lower speed level, wherein the lower speed level and the at least one even lower speed level are higher than zero, i.e. the rotational shaft is turning and not standing still. Therefore, the amount of speed reduction from the normal speed level to the lower speed level is different to the amount of speed reduction from the normal speed level to the even lower speed level, and therefore variable.
  • the protection circuit is also set up to decrease the speed of the rotational shaft to zero, depending on the amount of the detected movement, i.e. an emergency switch off.
  • variable amount is depending on the amount of the detected movement, which may preferably be understood as a relation between the amount of speed reduction and the amount of the detected movement.
  • the amount of the detected movement may for example be the velocity of the movement (e.g., rotation) of the housing or the acceleration of the movement of the housing or a relative, preferably angular displacement compared to a reference position.
  • the protection circuit has an input terminal and an output terminal, wherein the input terminal is connected to the sensor and the output terminal is connected to the speed control unit, wherein the protection circuit is set up to output a signal s out at the output terminal being defined by values according to a function f of a signal s in at the input terminal.
  • the protection circuit is correspondingly set up and a signal s out is output at the output terminal being defined by values according to a function f of a signal s in at the input terminal.
  • the function has the property to output a value causing a lower rotational speed for an input value representing a higher amount of the movement of the housing.
  • the function will return an output value causing a speed of zero, and if the lowest possible amount of movement is input to the function, the function will return an output, that is not affecting the currently speed set by the user.
  • a simple example of such a function could be a linear function connecting this Maximum and Minimum, however, it should be noted that many other different function descriptions exist that serve the purpose of providing a reduction of the speed with an increase of the amount of the movement of the housing.
  • the function f is a continuous function.
  • the user gains even a better feedback as the information on the current movement of the housing of the hand tool is captured and processed by the function so as to result in a continuous reduction of the speed according to the amount of the detected movement.
  • This provides the great chance to the user to feel a very detailed effect of his/her movements on the (security) state of the machine and he can adapt his handling of the machine very advantageously to prevent critical situations.
  • a continuous function f may preferably be understood as a function without substantial jumps. Particularly preferable, it is a function, for which small changes in the input result in small changes in the output. Small may preferably understood as being less than 20 %, preferably 10 % particularly preferably 5 % of the input range, respectively output range.
  • the continuous function f according to the invention may be understood as a function, in which the value at a digital point (sample point) is the same or off by at most a maximum difference from its neighbors.
  • the output given in response to the measured movement can be considered and perceived by the user as being smooth, yielding in a finer and more useful feedback and allowing him to react earlier before the tool gets into a critical state - like that, the user may be able to easily prevent the critical state.
  • the protection circuit is set up to determine the values of the preferably continuous function f by calculation. In a further preferred method according to the present invention the values of the continuous function f are calculated.
  • the calculation may be digital or analog.
  • the input signal s in does not need to be compared to one or more thresholds by use of a comparing unit and then a specific output value is chosen - instead, the input signal s in can be processed straight forward with one single function term (for example one line of code) or one analog circuit, realizing that function.
  • one single function term for example one line of code
  • one analog circuit realizing that function.
  • the approach of calculation is superior also with regard to the amount of memory or number of reference voltages needed, which yields a simpler digital/analog circuit.
  • the protection circuit is set up to perform the calculation by the use of (preferably exclusively) one or more of the following operations: addition; subtraction; multiplication; division; exponentiation; logarithmic calculation; negation; evaluation of a trigonometric function.
  • the calculation is performed correspondingly.
  • the protection circuit is set up to decrease the speed of the rotational shaft by the variable amount to different speed levels without comparing the amount of the detected movement to one or more thresholds.
  • the protection circuit is set up to determine the values of the preferably continuous function f without comparing s in (or a signal proportional to s in ) to one or more thresholds.
  • a threshold comparison in the course of sampling an analog signal from the sensor may be present though - this is not considered as a threshold comparison for determining the values of the continuous function f.
  • the protection circuit is set up for preprocessing a signal of the sensor, preferably s in , by calculating a moving average of it.
  • a signal of the sensor is preprocessed correspondingly.
  • the preprocessed signal is then fed to the protection circuit.
  • the protection circuit is an analog circuit.
  • the protection circuit comprises or is part of a digital computing unit.
  • the function may be easily programed, changed or adapted.
  • a nearly ideal continuous function may be achieved.
  • the continuous function f according to the invention may be understood as the function, in which the value at a digital point (sample point) is the same or off by at most a maximum difference from its neighbors.
  • x 1 and x 2 are two adjacent points in a digital space,
  • the function has more equal or more output values as mentioned above.
  • s out is generated by a Digital-to-Analog-Converter or as a (pulse width) modulated binary signal, wherein the modulation is done according to the function f.
  • s out is obviously defined by values according to the function f, as the modulation of s out is defined by the function f.
  • the digital computing unit has an input resolution p in min and an output range r out , wherein the digital computing unit is set up for computing the continuous function f depending on s in , wherein for every change of s in in the amount of p in min , the change of s out is maximally 10 % of r out .
  • the function f is considered continuous for digital signals - this corresponds to the above mentioned definition
  • p in min ⁇ 10 % of r out .
  • a maximal possible jump of the function when going from one sample point of s in to the next sample point of s in is defined by this.
  • the possible jump of the function (y-axis-direction) is smaller or equal to this maximal jump. Therefore, the resulting signal is smooth enough for the purpose of the invention according to the embodiment including the continuous function.
  • An input resolution may preferably be understood as the smallest distinguishable difference between two values of s in and/or the smallest distinguishable difference between two values of any signal acquired (A-to-D-Conversion) by the digital computing unit.
  • An output range may preferably be understood as the range defined by the highest and lowest possible value of the function given the interval of input values and/or the range defined by the highest and lowest possible value that the digital circuit is able to generate at its output.
  • the digital computing unit has an output resolution p out min and the digital computing unit is set up for computing the continuous function f depending on s in , wherein for every change of s in in the amount of p in min , the change of s out is maximally p out min .
  • An output resolution may preferably be understood as the smallest distinguishable difference between values of any signal that is output (D-to-A-Conversion) by the digital computing unit.
  • p out min is smaller than 10 % of the output range of the computing unit.
  • the hand tool comprises a user input means for receiving an information about the speed desired by the user, wherein the variable amount is also depending on a state of the user input means. In a further preferred method according to the present invention the variable amount is also depending on a state of a user input means of the hand tool.
  • the user has a further improved feedback as the protection might only reduce the speed substantially when really needed - instead, in situations that are not critical although there is a strong movement of the housing, the speed is not affected too strong.
  • the output of the protection circuit is influenced by the current operational state of the hand tool.
  • the protection circuit is therefore set up to output the signal s out also depending of a state of the user input means and/or the protection circuit is outputting the signal s out also depending of a state of the user input means.
  • a user input means may preferably be understood as any means, which the user is (manually) operating to control the speed and/or the torque of the hand tool. It is for example a switch, button, most preferably a trigger button as usually used in known drilling tools.
  • the user input means has more than two states (e.g., more than just on/off, but at least one, preferably a plurality of in-between states).
  • This embodiment and the remaining embodiments that including the consideration of the user input means state may preferably be used not necessarily with the feature of the protection circuit being set up to decrease the speed of the rotational shaft by a variable amount to different speed levels above zero, wherein the variable amount is depending on the amount of the detected movement - this broader idea (limited to the user input means) may be subject of a divisional application.
  • the protection circuit may be set up to decrease the speed from normal to zero with only one or even no reduced speed level in between, however the reduced speed level and or a threshold, at which the speed is reduced or set to zero, depends on the state of the user input means.
  • Other features combined with this or the following user input means embodiments may still be combined with this modified embodiment.
  • the protection circuit has a further input terminal to which the user input means is connected and the (preferably continuous) function f is also a (preferably continuous) function of a signal s in2 at the further input terminal.
  • the protection circuit is correspondingly set up and outputting the signal s out at the output terminal being defined by values according to the function f which is also a (preferably continuous) function of a signal s in2 at the further input terminal.
  • the same computing unit may be used for calculating the function f.
  • the function f is only continuous with respect to s in (which means, that with respect to s in2 there may exist considerable jumps of the function value), particularly preferably it is continuous with respect to both, s in and s in2 .
  • a decrease of the speed of the rotational shaft is smaller than a decrease of the speed if the user input means is in a state representing a higher power demand by the user.
  • an amount, by which the speed of the rotational shaft is reduced is smaller, if the user input means is in a state representing a lower power demand by the user, than an amount, by which the speed of the rotational shaft is reduced, if the user input means is in a state representing a higher power demand by the user.
  • the protective circuit As the speed is decreased less, when the user input means is in a state representing a lower power demand, the protective circuit is more sensible when the hand tool is running at a higher power level, than at a lower power level. This is very good, as at a higher power level, it might be more crucial to protect the user and furthermore, there might exist cases where the user indeed wants to shake the tool and at the same time have a slow rotation of the tool, e.g. when the user wants to free a stuck drilling bit or the like - in this situation, the user will not be disturbed by an onset or a too strong onset of some protective reaction of the tool, as for example a complete breaking.
  • the protection circuit is hence set up to decrease the speed of the rotational shaft less, if the user input means is in a state representing a lower power demand by the user than if the user input means is in a state representing a higher power demand by the user.
  • the function f is configured to cause the speed control unit to decrease the speed of the rotational shaft accordingly less.
  • one or more of the protection circuit and the sensor is disposed in or on a battery of the hand tool, wherein the battery is detachable from the hand tool and connectable to a different hand tool.
  • the different hand tools are set up to calibrate themselves to the one or more of the protection circuit and the sensor disposed in or on the battery after the battery has been attached or set up to calibrate the one or more of the protection circuit and the sensor disposed in or on the battery to the respective hand tool after the battery has been attached.
  • the control method contains a corresponding calibration step.
  • the hand tools may be of the same type or preferably of a different type, e.g. a drilling tool and a wall grinding tool or screw driving tool.
  • the function f could be calibrated to be less sensitive (less reduction of speed for the same amount of movement of the housing) in the case of a screw driver, because there, the user is expected to move and slant the tool deliberately whereas in the case of a drilling tool (especially drill hammer), the function f should be comparably more sensitive as holes shall be straight (so less deliberate movement by the user) and security is more important as higher speeds and/or torques are present.
  • This embodiment and the remaining embodiments that include the set up with the detachable battery may preferably not necessarily include the feature of the protection circuit being set up to decrease the speed of the rotational shaft by a variable amount to different speed levels above zero, wherein the variable amount is depending on the amount of the detected movement - this broader idea (limited to the detachable battery) may be subject of a divisional application. I.e., in case the detachable battery having one or more of the protection circuit and the sensor is present, the protection circuit may be set up to decrease the speed from normal to zero with only one or even no reduced speed level in between. Other features combined with this or the following detachable battery embodiments may still be combined with this modified embodiment.
  • the object of the invention is furthermore achieved by a detachable battery for a hand tool, wherein the battery comprises one or more of the protection circuit and the sensor, being disposed in or on the battery.
  • Fig. 1 is an overview of a power hand tool 1 according to the invention. It has a rotational shaft 2 driven by a driving unit 3.
  • the hand tool 1 comprises a sensor 10 for detecting a movement of a housing 4 of the hand tool 1, a speed control unit 20 for controlling the speed of the rotational shaft 2 and a protection circuit 30 set up to control the speed control unit 20 for protecting a user of the hand tool 1 based on the detected movement.
  • the hand tool 1 is electric, having an electric motor 3, which is activated by a trigger button 40 connected to the speed control unit 20.
  • hand tool 1 is not only switched off or decreased one time before it is switched off.
  • the multiple reduced speed levels above zero provide a better feedback to the user how far/close the state of the machine is from/to a critical situation.
  • Fig. 2 is an overview of a hand tool 1 based on Fig. 1 wherein the protection circuit 30 is set up for outputting a signal s out according to a function f, which is continuous.
  • the protection circuit 30 has an input terminal 31 and an output terminal 32, wherein the input terminal 31 is connected to the sensor 10 and the output terminal 32 is connected to the speed control unit 20.
  • the protection circuit 30 is set up to output a signal s out at the output terminal 32 being defined by values according to a function f of a signal s in at the input terminal 31.
  • the function f is a continuous function. An example of f is given in a small diagram in the lower right.
  • this function f has the following effect: the higher the speed of the movement of the housing 4, the lower the speed of the rotational shaft 2.
  • the function f is providing many - preferably uncountable - speed levels of the rotational shaft 2 depending on the speed of the movement of the housing 4.
  • the protection circuit 30 is further set up to determine the values of the function f by calculation. No thresholds are being used for determining the values of the function f.
  • Fig. 3 shows an example of a digital continuous function f (solid line), which is the case if the protection circuit 30 comprises or is part of a digital computing unit.
  • the digital computing unit has an input resolution p in min and an output range r out , wherein the digital computing unit is set up for computing the continuous function f depending on s in , wherein for every change of s in in the amount of p in min , the change of s out is maximally 10 % of r out .
  • the digital computing unit has an output resolution p out min and the digital computing unit is set up for computing the continuous function f depending on s in , wherein for every change of s in in the amount of p in min , the change of s out is maximally p out min .
  • the protection circuit 30 is set up to generate thirteen different reduced speeds of the rotational shaft 2.
  • This function is considered continuous, as it is an approximation of a continuous function (dotted line) and therefore quasi-continuous.
  • the function is digital, it is smooth enough to provoke the advantageous effect of a continuous function according to the invention, i.e., a very fine and sensitive feedback depending on the movement of the housing.
  • Fig. 4 is an overview of a hand tool 1 based on Fig. 2 , wherein s out is also depending on the state of the trigger button 40 as user input means.
  • the trigger button 40 is representing a means for receiving an information about the speed desired by the user.
  • the variable amount, by which the speed is reduced, is also depending on a state of the trigger button 40.
  • the protection circuit 30 is further set up to output the signal s out also depending of a state of the trigger button 40.
  • the protection circuit 30 has a further input terminal 33 to which the trigger button 40 is connected and the continuous function f is also a function of a signal s in2 at the further input terminal 33.
  • An exemplary function is shown in the lower right, the function being now a plane in the space given by s in , s in2 and s out .
  • the need of protection is automatically adapted to the current state of the machine or the current state desired by the user.
  • the function f leads to the protection circuit 30 being set up to decrease the speed of the rotational shaft 2 less, if the trigger button 40 is in a state representing a lower power demand by the user than if the trigger button 40 is in a state representing a higher power demand by the user. If the trigger button 40 is in a state representing a lower power demand by the user, a decrease of the speed of the rotational shaft 2 is smaller than a decrease of the speed if the trigger button 40 is in a state representing a higher power demand by the user.
  • a low s in means a low amount of the movement of the housing 4
  • a low s in2 means a trigger, that is nearly completely (or completely) released
  • a high s in2 means a trigger 40 that is nearly completely (or completely) pressed down.
  • the lower s out the lower is the resulting speed of the rotational shaft 2. Therefore, one can see for every of the illustrated functions that for the same s in a low s in2 leads to a higher s out , than a high s in2 . For example, if the user desires a very slow operation of the tool 1 (low power demand), he is pressing the trigger 40 only in a very low amount.
  • Fig. 5 shows an example of a continuous function f that is depending on the input of the sensor and the input of the trigger button and that is continuous with respect to s in and s in2 .
  • Fig. 6 shows a continuous function f as in Fig. 5 , wherein f is only continuous with respect to the sensor signal s in .
  • Fig. 7 shows a continuous function f as in Fig. 6 , however with more output values with respect to the input of the trigger button s in2 .
  • s out ln 0.1 + 0.00001 * s in 2 * ⁇ s in + 2.08 + 2 ⁇ s in * 0.01 * s in 2 ⁇ 0.1 / abs s in 2 ⁇ 0.1 ⁇ s in * 0.01 * s in 2 ⁇ 0.3 / abs s in 2 ⁇ 0.3 ⁇ s in * 0.01 * s in 2 ⁇ 0.4 / abs s in 2 ⁇ 0.4 ; for s in from 0 to 0.33 and s in2 from 0 to 0.5 wherein In is the natural logarithm and abs the absolute value function, respectively.
  • Fig. 8 shows an overview of a hand tool 1 based on Fig. 1 , 2 or 4 , wherein the hand tool has a detachable battery 50 comprising the sensor 10 - instead, the protection circuit 30 or both, the protection circuit 30 and the sensor 10 could be comprised by the battery 50.
  • the battery 50 is detachable from the hand tool 1 and connectable to a different hand tool 1', which in this case is an angle grinder.
  • Fig. 9 shows the battery 50 for the tools 1, 1' according to Fig. 8 , comprising the sensor 10.
  • an enhanced power hand tool with an integrated protection circuit which provides a better feedback to the user.
  • the user can get a differentiated feeling of the impact of his actions and therefore, the handling of the tool and the efficiency of working with the tool is greatly enhanced.
  • the user may learn how to prevent critical situations or foresee critical situations earlier and perform corrective actions.
  • a particularly well working embodiment includes the speed reduction according to a continuous or quasi-continuous (in case of digital signals) function.
  • the feedback is still further enhanced, if a signal of the manual user input means of the tool is considered.

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  • Percussive Tools And Related Accessories (AREA)

Claims (13)

  1. Outil manuel électrique (1) ayant un arbre tournant (2) entraîné par une unité d'entraînement (3), l'outil manuel (1) comprenant un capteur (10) servant à détecter un mouvement d'un boîtier (4) de l'outil manuel (1), une unité de commande de vitesse (20) servant à commander la vitesse de l'arbre tournant (2) et un circuit de protection (30) configuré pour commander l'unité de commande de vitesse (20) pour protéger un utilisateur de l'outil manuel (1) en fonction du mouvement détecté, le circuit de protection (30) étant configuré pour diminuer la vitesse (v) de l'arbre tournant (2) d'une quantité variable jusqu'à différents niveaux de vitesse (vr1, ... vrn) supérieurs à zéro, la quantité variable dépendant de la quantité de mouvement détectée, moyennant quoi l'outil manuel (1) comprend un moyen d'entrée d'utilisateur (40) servant à recevoir une information concernant la vitesse souhaitée par l'utilisateur, caractérisé en ce que la quantité variable dépend également d'un état du moyen d'entrée d'utilisateur (40) et, si le moyen d'entrée d'utilisateur (40) est dans un état représentant une demande d'énergie plus faible de la part de l'utilisateur, une diminution de la vitesse de l'arbre tournant (2) est inférieure à une diminution de la vitesse ayant lieu si le moyen d'entrée d'utilisateur (40) est dans un état représentant une demande d'énergie plus élevée.
  2. Outil manuel (1) selon la revendication 1, dans lequel le circuit de protection (30) possède une borne d'entrée (31) et une borne de sortie (32), dans lequel la borne d'entrée (31) est reliée au capteur (10) et la borne de sortie (32) est reliée à l'unité de commande de vitesse (20), dans lequel le circuit de protection (30) est configuré pour sortir un signal sout sur la borne de sortie (32) qui est défini par des valeurs correspondant à une fonction f d'un signal sin présent sur la borne d'entrée (31).
  3. Outil manuel (1) selon la revendication 2, dans lequel la fonction f est une fonction continue.
  4. Outil manuel (1) selon la revendication 2 ou 3, dans lequel le circuit de protection (30) est configuré pour déterminer les valeurs de la fonction f par un calcul.
  5. Outil manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le circuit de protection (30) est configuré pour effectuer le calcul au moyen d'une ou plusieurs des opérations suivantes : addition ; soustraction ; multiplication ; division ; exponentiation ; calcul logarithmique ; négation; évaluation d'une fonction trigonométrique.
  6. Outil manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le circuit de protection (30) est un circuit analogique.
  7. Outil manuel (1) selon l'une quelconque des revendications 1 à 5, dans lequel le circuit de protection (30) comprend une unité de calcul numérique ou fait partie d'une telle unité.
  8. Outil manuel (1) selon les revendications 7 et 3, dans lequel l'unité de calcul numérique a une résolution d'entrée pin min et une plage de sortie rout, dans lequel l'unité de calcul numérique est configurée pour calculer la fonction continue f en fonction de sin, et dans lequel, pour chaque variation de sin dans la quantité de pin min, la variation de sout est au maximum de 10 % de rout.
  9. Outil manuel (1) selon les revendications 7 et 3, dans lequel l'unité de calcul numérique a une résolution de sortie pout min et l'unité de calcul numérique est configurée pour calculer la fonction continue f en fonction de sin, et dans lequel, pour chaque variation de sin dans la quantité de pin min, la variation de sout est au maximum égale à pout min.
  10. Outil manuel (1) selon l'une quelconque des revendications 2 à 9, dans lequel le circuit de protection (30) possède une autre borne d'entrée (33) à laquelle le moyen d'entrée d'utilisateur (40) est relié, et dans lequel la fonction f est également une fonction d'un signal sin2 présent sur l'autre borne d'entrée (33).
  11. Outil manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le circuit de protection (30) ou le capteur (10), ou les deux, sont disposés dans ou sur une batterie (50) de l'outil manuel (1), et dans lequel la batterie (50) peut être détachée de l'outil manuel (1) et être branchée sur un autre outil manuel (1').
  12. Batterie détachable (50) destinée à un outil manuel (1) selon la revendication 11, la batterie (50) comprenant le circuit de protection (30) ou le capteur (10), ou les deux, disposés dans ou sur la batterie (50).
  13. Procédé de commande pour un outil manuel électrique (1) ayant un arbre tournant (2) entraîné par une unité d'entraînement (3), comprenant les étapes consistant à :
    - détecter un mouvement d'un boîtier (4) de l'outil manuel (1) au moyen d'un capteur (10) de l'outil manuel (1),
    - commander une vitesse de l'arbre tournant (2) au moyen d'une unité de commande de vitesse (20),
    - commander l'unité de commande de vitesse (20) au moyen d'un circuit de protection (30) pour protéger un utilisateur de l'outil manuel (1) en fonction du mouvement détecté,
    moyennant quoi la vitesse de l'arbre tournant (2) diminue d'une quantité variable jusqu'à différents niveaux de vitesse supérieurs à zéro, la quantité variable dépendant de la quantité de mouvement détectée,
    caractérisé en ce que la quantité variable dépend également d'un état d'un moyen d'entrée d'utilisateur (40) de l'outil manuel, servant à recevoir une information concernant la vitesse souhaitée par l'utilisateur, moyennant quoi une quantité de diminution de la vitesse de l'arbre tournant est plus faible, si le moyen d'entrée d'utilisateur (40) est dans un état représentant une demande d'énergie plus faible de la part de l'utilisateur, qu'une quantité de diminution de la vitesse de l'arbre tournant ayant lieu si le moyen d'entrée d'utilisateur (40) est dans un état représentant une demande d'énergie plus élevée de la part de l'utilisateur.
EP15153381.7A 2015-01-30 2015-01-30 Outil à main avec feedback amélioré Active EP3050676B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15153381.7A EP3050676B1 (fr) 2015-01-30 2015-01-30 Outil à main avec feedback amélioré
PCT/US2015/065582 WO2016122788A1 (fr) 2015-01-30 2015-12-14 Outil électrique à main à rétroaction améliorée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15153381.7A EP3050676B1 (fr) 2015-01-30 2015-01-30 Outil à main avec feedback amélioré

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EP3050676B1 true EP3050676B1 (fr) 2017-09-27

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