Hand-held gardening, forestry and / or construction processing tool and method of operating the same

Abstract

The invention relates to a handheld gardening, forestry and / or building working tool and a method for operating the handheld gardening, forestry and / or building working tool (1), wherein the handheld gardening, forestry and / or building working tool (2) comprises a working tool (2); a motor drive system (3), wherein the motor drive system (3) is designed to drive the working tool (2); a user-adjustable operating element (4); and a control device (5), wherein the control device (5) is designed to control a theoretical slope (dntheoretical / dt) of a rotational speed (n) of the motor drive system (3) as a function of a position (ST) of the operating element (4) according to at least one dependency (ZO), such that the maximum theoretical slope (maxdntheoretical / dt) of the rotational speed (n) is different for different positions (ST).

Description

Technical Field

[0001] The invention relates to a handheld gardening, forestry and / or building work tool and a method for operating such a handheld gardening, forestry and / or building work tool. Background Art

[0002] The object of the present invention is to provide a handheld gardening, forestry and / or building work tool and a method for operating such a handheld gardening, forestry and / or building work tool which have respectively improved properties. Summary of the invention

[0003] The invention achieves this object by providing a handheld gardening, forestry and / or construction working tool according to the invention and / or a method according to the invention. The invention has a number of advantageous developments and / or embodiments.

[0004] The handheld gardening, forestry and / or construction tool according to the invention comprises or has a processing tool, an electric motor drive system, a user-adjustable operating element and an in particular electrical control device. The electric motor drive system is designed or configured to drive the processing tool. The control device is designed or configured to control, in particular automatically, a theoretical gradient over time, in particular a theoretical gradient or a theoretical rate of increase, or a value of a theoretical acceleration of the rotational speed of the electric motor drive system according to or in accordance with at least one dependency as a function of a position, in particular a value of the position, of the operating element, such that for different positions, in particular different values ​​of the position, the maximum theoretical gradient over time, in particular a maximum theoretical rate of increase, or a maximum theoretical acceleration of the rotational speed is different.

[0005] This allows the maximum theoretical slope to be adjusted differently, in particular to a lower or higher value, by the user of the gardening, forestry and / or building processing tool by means of different settings of the operating element. In particular, a lower adjustable maximum theoretical slope allows a rotation, in particular a nicking, of the gardening, forestry and / or building processing tool to be limited or restricted, or reduced or even avoided, in particular when the electric motor drive system is started. In other words: this allows a gentle start. This thus allows a lower load or even no load on the user, in particular on the user's hand joints. This thus allows a higher level of comfort for the user. Additionally or alternatively, a higher adjustable maximum theoretical slope allows the desired rotational speed to be reached quickly.

[0006] In particular, the gardening, forestry and / or construction work tool may be a handheld gardening, forestry and / or construction work tool. Additionally or alternatively, a handheld, in particular handheld gardening, forestry and / or construction work tool may mean that the gardening, forestry and / or construction work tool may have a mass of at most 50 kilograms (kg), in particular at most 20 kg, in particular at most 10 kg, in particular at most 5 kg and / or at least 1 kg, in particular at least 2 kg.

[0007] The operating element can have at least three different positions. In particular, the operating element can be infinitely adjustable by the user.

[0008] The control device for controlling can be a regulating device for regulating. Additionally or alternatively, the control device can have a microcontroller.

[0009] The setpoint slope can be realized in the unloaded state of the gardening, forestry and / or construction working tool, in particular of the electric motor drive system.

[0010] The correlation may be referred to as a theoretical slope limit or limitation. Additionally or alternatively, the correlation may be fixedly adjusted or preset on the factory side or may not be preset by the user. Additionally or alternatively, the correlation may associate different maximum theoretical slopes with different positions.

[0011] Different maximum theoretical slopes may be correspondingly greater than zero.

[0012] In a further development of the invention, the control device is designed or configured to control the theoretical speed, in particular the value of the theoretical speed and the theoretical slope of the speed, in particular automatically according to the at least one correlation as a function of the position to achieve the theoretical speed of the electric motor drive system. In particular, the theoretical speed can be achieved in an unloaded state of the gardening, forestry and / or construction processing tool, in particular the electric motor drive system. Additionally or alternatively, the correlation can associate at least, in particular only one, in particular only one theoretical speed, in particular only one single value of the theoretical speed, with different positions. Additionally or alternatively, the theoretical speed can be greater than zero.

[0013] In one embodiment of the invention, the control device is designed to control the setpoint speed according to the at least one correlation as a function of the position, so that the setpoint speed, in particular the value of the setpoint speed, is different for different positions, in particular different values ​​of the position. This enables the setpoint speed to be set differently by the user via different settings of the operating element. In particular, the correlation can associate different setpoint speeds with different positions. Additionally or alternatively, the different setpoint speeds can each be greater than zero.

[0014] In one embodiment of the invention, the control device is configured to control the theoretical speed according to the at least one correlation, so that the minimum theoretical speed, in particular the value of the minimum theoretical speed, is at least 0.1 times, in particular at least 0.2 times, in particular at least 0.3 times the value of the maximum theoretical speed, in particular the value of the maximum theoretical speed. This ensures, on the one hand, that the machining tool is always driven at a speed at which the machining tool can perform machining according to the regulations. On the other hand, the maximum theoretical slope that can be adjusted lower, in particular different from the higher maximum theoretical slope, makes it possible to reduce the speed jump (Drehzahlsprung) (caused by the minimum theoretical speed) in its influence when the electric motor drive system is started. In particular, the correlation can relate the minimum theoretical speed to at least 0.1 times, in particular at least 0.2 times, in particular at least 0.3 times the maximum theoretical speed. Additionally or alternatively, the minimum theoretical speed can be equal to the maximum theoretical speed.

[0015] In one embodiment of the present invention, the control device is constructed or configured to detect the actual speed of the electric motor drive system, in particular the value of the actual speed. In addition, the control device is constructed or configured to automatically determine the speed deviation, in particular the value of the speed deviation, in particular the speed difference, by comparing the detected actual speed and the theoretical speed, in particular by subtracting the actual speed from the theoretical speed. In addition, the control device is constructed or configured to control, in particular automatically, in particular according to the at least one correlation, so that the theoretical slope, in particular the value of the theoretical slope, is lower than the maximum theoretical slope, in particular the value of the maximum theoretical slope, and when the measured speed deviation is lower than the deviation limit value, in particular relative to the value of the maximum theoretical slope. This achieves reaching the theoretical speed. In particular, the deviation limit value may be independent of the position and / or different from zero. Additionally or alternatively, the deviation limit value may be equal to or lower than the minimum theoretical speed (if any).

[0016] In one embodiment of the invention, the control device is designed to control according to the at least one correlation so that the theoretical speed, in particular the value of the theoretical speed, increases or rises from a particularly minimum theoretical speed, in particular the value of the minimum theoretical speed, to a particularly maximum theoretical speed, in particular the value of the maximum theoretical speed, over the adjustment range, in particular the adjustment stroke, of the operating element from its starting position to its maximum position. The increase, in particular the value of the increase or rise, changes by a maximum of 20 percent (%) or does not change for every minimum 0.2 times of the adjustment range. In other words: the theoretical speed increases linearly from the minimum theoretical speed to the maximum theoretical speed over the adjustment range from its starting position to its maximum position. This enables the theoretical speed to be finely adjusted by the user. In particular, the starting position can differ from the minimum position or the closed position (Aus-Stellung) of the operating element.

[0017] In a further development of the invention, in particular a design, the control device is designed to control according to the at least one correlation, so that for a smaller position or starting position, the maximum theoretical slope, in particular the value of the maximum theoretical slope is lower, in particular the minimum, and in particular the theoretical speed, in particular the value of the theoretical speed is lower, in particular the minimum, while for a larger position or maximum position, the maximum theoretical slope, in particular the value of the maximum theoretical slope is higher, in particular the maximum, and in particular the theoretical speed, in particular the value of the theoretical speed is higher, in particular the maximum. This enables the maximum theoretical slope, in particular the theoretical speed, to be adjusted intuitively by the user accordingly. In particular, the correlation can associate a lower maximum theoretical slope, in particular the lower theoretical speed, with a smaller position and a higher maximum theoretical slope, in particular the higher theoretical speed, with a larger position.

[0018] In one embodiment of the invention, the transition or increase from the lower maximum theoretical slope to the higher maximum theoretical slope extends over a minimum of 0.1 times, in particular 0.2 times, in particular 0.3 times the adjustment range, in particular the adjustment stroke, of the operating element. Additionally or alternatively, the transition or increase from the lower maximum theoretical slope to the higher maximum theoretical slope begins at a maximum of half, in particular a quarter, of the maximum position of the operating element. This, in particular this extension, enables the transition to be gentle or smooth. Additionally or alternatively, this, in particular this start, enables the transition to be realized quickly.

[0019] In a further development of the invention, the control device is constructed or configured to control the second-order theoretical slope, in particular the value of the second-order theoretical slope or the second-order theoretical rate of increase, in particular in time, of the theoretical slope according to the position of the operating element, in particular automatically, in accordance with the at least one correlation, so that for different positions, in particular different values ​​of the position, the second-order maximum theoretical slope, in particular the value of the second-order maximum theoretical slope or the second-order maximum theoretical rate of increase of the theoretical slope, in particular in time, is different. This enables the second-order maximum theoretical slope to be adjusted differently, in particular lower or higher, by the user through different settings of the operating element. In particular, a second-order maximum theoretical slope that can be adjusted lower makes it possible to limit or define or reduce or even avoid the shaking (Ruck) of the gardening, forestry and / or construction processing tool, in particular when the motor drive system is started. In other words: this enables a gentle start. Therefore, this enables a lower load or even no load for the user. Additionally or alternatively, a second-order maximum theoretical slope that can be adjusted higher makes it possible to quickly reach the desired rotation speed. In particular, the theoretical slope can be referred to as the first derivative of the speed over time and the second theoretical slope can be referred to as the second derivative of the speed over time. Additionally or alternatively, the second theoretical slope can be achieved in an unloaded state of the gardening, forestry and / or construction tool, in particular the electric motor drive system. Additionally or alternatively, the association can associate different second-order maximum theoretical slopes with different positions. Additionally or alternatively, the different second-order maximum theoretical slopes can each be greater than zero.

[0020] In a further development of the invention, the control device is constructed or configured to detect, in particular automatically, the adjustment duration, in particular the value of the adjustment duration and / or the adjustment speed, in particular the value of the adjustment speed, of the adjustment of the operating element. In addition, the control device is constructed or configured to control, in particular automatically, according to the correlation when the detected adjustment duration reaches and / or exceeds the duration limit value and / or when the detected adjustment speed reaches and / or falls below the speed limit value. In addition, the control device is constructed or configured to control, in particular automatically, according to another correlation when the detected adjustment duration falls below the duration limit value and / or when the detected adjustment speed exceeds the speed limit value, so that for at least one of the different positions, in particular at least one of the different values ​​of the position, the maximum theoretical slope is higher, in particular maximum, relative to the correlation. This enables the correlation or the lower maximum theoretical slope or the other correlation or the higher maximum theoretical slope to be adjusted by the user through the different fast adjustments of the operating element. In particular, the higher adjustable maximum theoretical slope enables the desired rotation speed to be reached quickly. In particular, the further correlation can associate a higher maximum theoretical slope with at least one of the different positions relative to the correlation. Additionally or alternatively, the control according to the further correlation, in particular the further correlation, can also correspond to, in particular be identical to, the control according to the correlation, in particular the correlation.

[0021] In a further development of the invention, the gardening, forestry and / or construction processing tool comprises or has a potentiometer. The operating element is constructed or configured for adjusting the value of an electrical variable of the potentiometer. The control device is constructed or configured for controlling the theoretical slope according to the value of the variable in accordance with the at least one correlation, so that the maximum theoretical slope of the rotational speed is different for different values ​​of the variable. This enables position-dependent control. In particular, the potentiometer can have a Hall sensor and / or the variable can be a Hall voltage. Alternatively, the variable can be a resistor. Additionally or alternatively, the correlation can associate different maximum theoretical slopes with different values ​​of the parameter.

[0022] In a further development of the invention, the control device is designed or configured to control, in particular automatically, the torque generated by the electric motor drive system, in particular the value of the torque, in order to achieve a setpoint gradient. This enables the control of the setpoint gradient.

[0023] In a further development of the invention, the gardening, forestry and / or construction tool is a saw, a pruning machine, a free cutter, a blower, a leaf blower, Or cutting machine (Trennschleifer).

[0024] The method according to the invention is designed or configured for operating a handheld gardening, forestry and / or construction tool, in particular as described above. The method comprises or has the step of controlling, in particular automatically controlling, a setpoint slope of the rotational speed of the electric motor drive system according to the at least one dependency as a function of the position of the operating element by means of the control device in such a way that the maximum setpoint slope of the rotational speed is different for different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Further advantages and aspects of the present invention are apparent from the following description of preferred exemplary embodiments of the present invention, which are explained below with reference to the accompanying drawings. In particular:

[0026] Figure 1 A hand-held gardening, forestry and / or construction tool according to the invention is schematically shown.

[0027] Figure 2 Schematically shows Figure 1 A control device for gardening, forestry and / or building processing tools and a control device for operating a gardening, forestry and / or building processing tool according to the invention Figure 1 methods of processing tools for gardening, forestry and / or construction,

[0028] Figure 3 shows the maximum theoretical slope of the speed with respect to Figure 1Theoretical speed of the electric motor drive system of a gardening, forestry and / or building processing tool and the theoretical speed of the electric motor drive system Figure 1 Diagrams of values ​​of electrical parameters of potentiometers of horticultural, forestry and / or building processing appliances,

[0029] Figure 4 A further diagram shows the maximum theoretical slope over the theoretical rotational speed,

[0030] Figure 5 A further diagram showing the maximum theoretical slope over the theoretical rotational speed,

[0031] Figure 6 A further diagram showing the maximum theoretical slope over the theoretical rotational speed,

[0032] Figure 7 A graph showing the maximum theoretical slope deviation versus theoretical rotation speed is shown,

[0033] Figure 8 a graph showing the second order maximum theoretical slope of the theoretical slope versus the theoretical speed, and

[0034] Fig. 9 A diagram of the second-order maximum theoretical deviation is shown over the theoretical rotational speed. DETAILED DESCRIPTION

[0035] Figure 1 A handheld gardening, forestry and / or building work tool 1 according to the invention is shown. The gardening, forestry and / or building work tool 1 comprises a work tool 2, an electric motor drive system 3, a user-adjustable operating element 4 and a control device 5. The electric motor drive system 3 is designed, in particular drives, a drive for the work tool 2. The control device 5 is designed, in particular controls, a theoretical slope dntheoretical / dt for controlling a rotation speed n of the electric motor drive system 3 according to at least one dependency ZO as a function of the position of the operating element 4, as in Figure 2 As shown in , the maximum theoretical slope maxdntheoretical / dt of the rotation speed n is different for different positions ST, as shown in Figures 3 to 6 as shown in .

[0036] Figure 2 The method according to the invention for operating a handheld gardening, forestry and / or construction working tool 1 is shown. The method comprises the steps of controlling the setpoint gradient dntheoretical / dt of the rotational speed n of the electric motor drive system 3 according to the at least one dependency ZO as a function of the position ST of the operating element 4 by means of the control device 5 in such a way that the maximum setpoint gradient maxdntheoretical / dt of the rotational speed n is different for different positions ST.

[0037] In the embodiment shown, the gardening, forestry and / or construction working tool 1 is a saw 1 ′. In alternative embodiments, the gardening, forestry and / or construction working tool 1 may be a pruner, a free cutter, a blower, a leaf blower or a cutter.

[0038] Furthermore, control device 1 is designed, in particular controlled, to control torque M generated by electric motor drive system 3 in order to achieve a setpoint gradient dnset / dt.

[0039] Furthermore, in the exemplary embodiment shown, the gardening, forestry and / or building processing tool 1 has a potentiometer 6. The operating element 4 is designed, in particular to adjust a value WG of an electrical variable G for adjusting the potentiometer 6. The control device 5 is designed, in particular to control the setpoint gradient dntheoretical / dt according to the at least one dependency ZO as a function of the value WG of the variable G, so that for different values ​​WG of the variable G the maximum setpoint gradient maxdntheoretical / dt of the rotational speed n is different.

[0040] In an alternative embodiment, the gardening, forestry and / or construction working tool 1 has at least two switches, wherein the operating element can be constructed for adjusting the switches, wherein the control device can be constructed for controlling the theoretical slope dntheoretical / dt according to the respective switch positions of the switches in accordance with the at least one correlation, so that the maximum theoretical slope of the rotational speed can be different for different switch positions.

[0041] In particular, in the exemplary embodiment shown, the potentiometer 6 has a Hall sensor 6 ′ and the variable G is the Hall voltage UH.

[0042] Furthermore, the control device 5 is constructed, in particular, to detect an adjustment duration STt and / or an adjustment speed STv, in particular a value WG of a variable G, for detecting an adjustment of the operating element 4. Furthermore, the control device 5 is constructed, in particular, to control in accordance with a correlation ZO when a duration limit value tlimit is reached and / or exceeded by the detected adjustment duration STt and / or when a speed limit value vlimit is reached and / or fallen below by the detected adjustment speed STv. Furthermore, the control device 5 is constructed, in particular, to control in accordance with another correlation ZO' when a duration limit value tlimit is fallen below by the detected adjustment duration STt and / or when a speed limit value vlimit is exceeded by the detected adjustment speed STv, so that for at least one of the different positions ST, the maximum theoretical slope maxdntheoretical / dt is higher, in particular maximum, than in accordance with the correlation ZO, such as in Figure 3 as shown in .

[0043] In the exemplary embodiment shown, for a small position SST, in particular a small value SWG of the variable G, the maximum theoretical slope maxdntheoretical / dt is greater than according to the association ZO. For a large position maxST, in particular a large value maxWG of the variable G, the maximum theoretical slope maxdntheoretical / dt is equal to according to the association ZO, in particular maximum.

[0044] Furthermore, the further association ZO′ is identical to the association ZO.

[0045] In particular, the further dependency ZO′ can be the dependency ZO plus an offset, in particular a maximum theoretical slope offset, which is in particular position-dependent.

[0046] Figure 7 Further possible offsets ZO", ZO"', ZO"", ZO""' are shown.

[0047] Furthermore, control device 5 is designed, in particular controls, to control setpoint speed ntheore and setpoint slope dntheore / dt of speed n as a function of position ST, in particular value WG, in accordance with the at least one dependency ZO, in particular or a further dependency ZO′, to achieve setpoint speed ntheore of electric motor drive system 3 .

[0048] In detail, control device 5 is designed, in particular controlled, to control set speed ntheoretical according to the at least one dependency, in particular ZO or further dependency ZO′ as a function of position ST, in particular value WG, so that for different positions ST, in particular different values ​​WG of variable G, set speed ntheoretical is different.

[0049] Furthermore, control device 5 is designed, in particular controlled, to control setpoint speed ntheoretical according to the at least one dependency ZO, in particular or in addition setpoint ZO′, such that minimum setpoint speed minntheoretical is at least 0.1 times maximum setpoint speed maxntheoretical.

[0050] In the exemplary embodiment shown, the minimum theoretical rotational speed minntheoretical is 4500 revolutions per minute (R / min). In addition, the maximum theoretical rotational speed maxntheoretical is 13000 R / min.

[0051] Furthermore, the control device 5 is designed, in particular, to detect an actual speed nactual for detecting the electric motor drive system 3. Furthermore, the control device 5 is designed, in particular, to determine a speed deviation Δn by means of a mutual comparison of the detected actual speed nactual and a set speed ntheoretical. Furthermore, the control device 5 is designed, in particular, to control according to the at least one dependency ZO, in particular or an additional dependency ZO′, such that when the determined speed deviation Δn reaches and / or exceeds a deviation limit value Δnlimit and when the determined speed deviation Δn falls below a deviation limit value Δnlimit, the set slope dntheoretical / dt is lower than the maximum set slope maxdntheoretical / dt.

[0052] In particular, the control device 5 for controlling is a regulating device 5 ′ for regulating.

[0053] In the exemplary embodiment shown, the regulating device 5 ′ has a rotational speed regulator 5 ″ and a current regulator 5 ′″.

[0054] Furthermore, the deviation limit value Δnlimit is equal to or lower than the minimum theoretical rotational speed minntheoretical.

[0055] Furthermore, the control device 5 is designed, in particular controlled, to control according to at least one dependency ZO, in particular or another dependency ZO′, such that the set speed ntheoretical increases from a minimum set speed minntheoretical to a maximum set speed maxntheoretical over a control range STB of the operating element 4, in particular the value WG, from its starting position SST, in particular the starting value SWG of the variable G, to its maximum position maxST, in particular the maximum value maxWG of the variable G. For every minimum 0.2 times of the control range STB, this increase ZU changes by a maximum of 20 percent (%) or does not change.

[0056] In the exemplary embodiment shown, the starting position SST, in particular the starting value SWG, differs from the minimum position minST of the operating element 4 , in particular the minimum value minWG of the variable G.

[0057] In particular, the starting position SST, in particular the starting value SWG, is 10%. Additionally, the maximum position maxST, in particular the maximum value maxWG, is 100%. Also additionally, the minimum position minST, in particular the minimum value minWG, is 0%.

[0058] In addition, the control device 5 is constructed, in particular controlled, for controlling according to the at least one correlation ZO, so that for a smaller position or starting position SST, in particular a smaller value or starting value SWG, the maximum theoretical slope maxdntheoretical / dt is lower, in particular a minimum or a minimum maximum theoretical slope minmaxdntheoretical / dt, and for a larger position or maximum position maxST, in particular a larger value or maximum value maxWG, the maximum theoretical slope maxdntheoretical / dt is higher, in particular a maximum or a maximum maximum theoretical slope maxmaxdntheoretical / dt.

[0059] In the illustrated embodiment, the minimum maximum theoretical slope minmaxdntheoretical / dt is 50 U / min every 10 milliseconds (ms). Additionally, the maximum maximum theoretical slope maxmaxdntheoretical / dt is 2000 U / min every 10 ms.

[0060] In particular, the maximum maximum theoretical slope maxmaxdntheoretical / dt is higher than the maximum achievable slope maxdn / t of the rotational speed n, which in the illustrated exemplary embodiment is 950 R / min per 10 ms. The maximum achievable slope maxdn / t is limited by the maximum achievable torque maxM generated by the electric motor drive system 3 .

[0061] Furthermore, the control device 5 is constructed, in particular controlled, for controlling in accordance with the at least one correlation ZO, in particular or another correlation ZO', such that for a smaller position or starting position SST, in particular a smaller value or starting value SWG, the theoretical speed ntheoretical is lower, in particular a minimum or a minimum theoretical speed minntheoretical, and for a larger position or maximum position maxST, in particular a larger value or maximum value maxWG, the theoretical speed ntheoretical is higher, in particular a maximum or a maximum theoretical speed maxntheoretical.

[0062] In addition, as in Figure 3 , Figure 5 and Figure 6 As shown in FIG. 1 , the transition UG from the lower or minimum maximum theoretical slope minmaxdntheoretical / dt to the higher or maximum maximum theoretical slope maxmaxdntheoretical / dt extends over at least 0.1 times the adjustment range STB of the operating element 4 , in particular the value WG.

[0063] exist Figure 4 An alternative, particularly harder transition is shown in .

[0064] Additionally, as in Figure 3 , Figure 5 and Figure 6As shown in , the transition UGmax from the lower or minimum maximum theoretical slope minmaxdntheoretical / dt to the higher or maximum maximum theoretical slope maxmaxdntheoretical / dt begins at the half-maximum position maxST of the operating element 4 , in particular at the half-maximum value maxWG.

[0065] In particular, Figure 3 The transition UG shown in FIG. 1 acts over a wider range and is smoother between weaker and stronger acceleration, but because time is required for the adjustment, time is lost for acceleration to a higher rotational speed.

[0066] exist Figure 4 The transition UG shown in FIG. 2 acts over a wider range, but because time is required for regulation, time is lost for acceleration to a higher rotational speed, and the transition is harder.

[0067] exist Figure 5 The transition shown in enables fast acceleration and is softer for higher accelerations, but requires sensitive adjustments to achieve the effect.

[0068] exist Figure 6 The transition shown in works over a wide range and is very smooth between weaker and stronger acceleration, but the weaker acceleration is slow.

[0069] In addition, as in Figure 8 As shown in FIG. 1 , the control device 5 forms, in particular controls, a second-order setpoint slope dntheoretical / dt for controlling the setpoint slope dntheoretical / dt according to the at least one dependency ZO as a function of the position ST, in particular the value WG, of the operating element 4 . 2 ntheoretical / dt2, so that for different positions ST, especially different values ​​WG, the second-order maximum theoretical slope maxd of the theoretical slope dntheoretical / dt 2 ntheory / dt2 is different.

[0070] In particular, the control device 5 is designed, in particular controlled, to control according to the at least one dependency ZO such that for a small position or starting position SST, in particular a small value or starting value SWG, the second-order setpoint slope d 2 ntheoretical / dt2 is low, especially the minimum or the smallest second-order theoretical slope mind 2 ntheoretical / dt2, while for larger positions or maximum positions maxST, especially larger values ​​or maximum values ​​maxWG, the second-order theoretical slope d 2 ntheoretical / dt2 is high, especially the maximum or the largest second-order theoretical slope maxd 2 ntheoretical / dt2.

[0071] Additionally or alternatively, the further dependency ZO′ can be the dependency ZO plus an offset, in particular a position-dependent offset, in particular a second-order maximum theoretical slope offset.

[0072] Fig. 9 Further possible offsets ZO", ZO"', ZO"", ZO""' are shown.

[0073] In the exemplary embodiment shown, the gardening, forestry and / or building work tool 1 is designed for electrical connection, in particular is electrically connected, to a battery 10. In alternative exemplary embodiments, the gardening, forestry and / or building work tool may additionally or alternatively be designed for electrical connection to a cable.

[0074] As the exemplary embodiments shown and explained above demonstrate, the present invention provides an advantageous hand-held gardening, forestry and / or building work tool and a method for operating such a hand-held gardening, forestry and / or building work tool, which have correspondingly improved properties.

Claims

1. A hand-held gardening, forestry and / or construction tool (1), wherein: The handheld gardening, forestry and / or construction processing tool (1) has: - machining tools (2), - an electric motor drive system (3), wherein the electric motor drive system (3) is designed to drive the machining tool (2), - user-adjustable operating elements (4), and - A control device (5), wherein the control device (5) is designed to control the theoretical gradient (dntheoretical / dt) of the rotational speed (n) of the electric motor drive system (3) according to the position (ST) of the operating element (4) in accordance with at least one correlation (ZO), so that the maximum theoretical gradient (maxdntheoretical / dt) of the rotational speed (n) is different for different positions (ST).

2. The hand-held gardening, forestry and / or construction working tool (1) according to claim 1, -in, The control device (5) is designed to control a setpoint speed (ntheoretical) and a setpoint slope (dntheoretical / dt) of the speed (ntheoretical) according to the at least one dependency (ZO) as a function of the position (ST) in order to achieve a setpoint speed (ntheoretical) of the electric motor drive system (3).

3. The hand-held gardening, forestry and / or construction working tool (1) according to claim 2, -in, The control device (5) is designed to control the setpoint speed (ntheoretical) according to the at least one dependency (ZO) as a function of the position (ST), such that the setpoint speed (ntheoretical) is different for different positions (ST).

4. The hand-held gardening, forestry and / or construction working tool (1) according to claim 2 or 3, -in, The control device (5) is designed to control the setpoint speed (ntheoretical) according to the at least one dependency (ZO) such that a minimum setpoint speed (minntheoretical) is at least 0.1 times a maximum setpoint speed (maxntheoretical).

5. The hand-held gardening, forestry and / or construction working tool (1) according to claim 2 or 3, -in, The control device (5) is designed to control the setpoint speed (ntheoretical) according to the at least one dependency (ZO) such that a minimum setpoint speed (minntheoretical) is at least 0.2 times a maximum setpoint speed (maxntheoretical).

6. The hand-held gardening, forestry and / or construction working tool (1) according to claim 2 or 3, -in, The control device (5) is designed to control the setpoint speed (ntheoretical) according to the at least one dependency (ZO) such that a minimum setpoint speed (minntheoretical) is at least 0.3 times a maximum setpoint speed (maxntheoretical).

7. The hand-held gardening, forestry and / or construction working tool (1) according to any one of claims 2 to 3, -in, The control device (5) is constructed to detect the actual speed (nactual) of the electric motor drive system (3), to determine the speed deviation (Δn) by comparing the detected actual speed (nactual) with the theoretical speed (ntheoretical), and to control so that the theoretical slope (dntheoretical / dt) is the maximum theoretical slope (maxdntheoretical / dt) when the determined speed deviation (Δn) reaches and / or exceeds the deviation limit value (Δnlimit) and is lower than the maximum theoretical slope (maxdntheoretical / dt) when the determined speed deviation (Δn) is below the deviation limit value (Δnlimit).

8. The hand-held gardening, forestry and / or construction working tool (1) according to any one of claims 2 to 3, -in, The control device (5) is designed to detect an actual speed (nactual) of the electric motor drive system (3), to determine a speed deviation (Δn) by comparing the detected actual speed (nactual) with the theoretical speed (ntheoretical), and to control according to the at least one correlation (ZO) so that the theoretical slope (dntheoretical / dt) is the maximum theoretical slope (maxdntheoretical / dt) when the determined speed deviation (Δn) reaches and / or exceeds a deviation limit value (Δnlimit) and is lower than the maximum theoretical slope (maxdntheoretical / dt) when the determined speed deviation (Δn) falls below the deviation limit value (Δnlimit).

9. The hand-held gardening, forestry and / or construction working tool (1) according to any one of claims 2 to 3, -in, The control device (5) is designed to control according to the at least one dependency (ZO) so that the setpoint speed (ntheoretical) increases from a minimum setpoint speed (minntheoretical) to a maximum setpoint speed (maxntheoretical) over an adjustment range (STB) of the operating element (4) from its starting position (SST) to its maximum position (maxST), wherein the increase (ZU) changes by a maximum of 20% or does not change for every minimum 0.2 times of the adjustment range (STB).

10. The hand-held gardening, forestry and / or construction working tool (1) according to any one of claims 1 to 3, -in, The control device (5) is designed to control according to the at least one correlation (ZO) so that for a small position (SST) the maximum theoretical slope (maxdntheoretical / dt) is a low maximum theoretical slope (minmaxdntheoretical / dt), and for a large position (maxST) the maximum theoretical slope (maxdntheoretical / dt) is a high maximum theoretical slope (maxmaxdntheoretical / dt).

11. The hand-held gardening, forestry and / or construction working tool (1) according to any one of claims 2 to 3, -in, The control device (5) is designed to control according to the at least one dependency (ZO) so that for a small position (SST), the maximum theoretical slope (maxdntheoretical / dt) is a low maximum theoretical slope (minmaxdntheoretical / dt) and the theoretical speed (ntheoretical) is a low theoretical speed, while for a large position (maxST), the maximum theoretical slope (maxdntheoretical / dt) is a high maximum theoretical slope (maxmaxdntheoretical / dt) and the theoretical speed (ntheoretical) is a high theoretical speed.

12. The hand-held gardening, forestry and / or construction working tool (1) according to claim 10, -in, The transition (UG) from the low maximum theoretical slope (minmaxdntheoretical / dt) to the high maximum theoretical slope (maxmaxdntheoretical / dt) extends over at least 0.1 times the adjustment range (STB) of the operating element (4), and / or wherein the transition (UG) from the low maximum theoretical slope (minmaxdntheoretical / dt) to the high maximum theoretical slope (maxmaxdntheoretical / dt) begins at a maximum at the half-maximum position (maxST) of the operating element (4).

13. The hand-held gardening, forestry and / or construction working tool (1) according to claim 12, -in, The transition (UG) from the low maximum theoretical slope (minmaxdntheoretical / dt) to the high maximum theoretical slope (maxmaxdntheoretical / dt) extends over at least 0.2 times the adjustment range (STB) of the operating element (4).

14. The hand-held gardening, forestry and / or construction working tool (1) according to claim 12, -in, The transition (UG) from the low maximum theoretical slope (minmaxdntheoretical / dt) to the high maximum theoretical slope (maxmaxdntheoretical / dt) extends over at least 0.3 times the adjustment range (STB) of the operating element (4).

15. The hand-held gardening, forestry and / or construction working tool (1) according to claim 12, -in, The transition (UG) from the low maximum theoretical slope (minmaxdntheoretical / dt) to the high maximum theoretical slope (maxmaxdntheoretical / dt) begins at a maximum of one quarter of the maximum position (maxST) of the operating element (4).

16. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The control device (5) is designed to control a second-order setpoint slope (dntheoretical / dt) of the setpoint slope (dntheoretical / dt) according to the at least one dependency (ZO) as a function of the position (ST) of the operating element (4). 2 ntheoretical / dt2), so that for different positions (ST), the second-order maximum theoretical slope (maxd 2 n theory / dt2) is different.

17. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The control device (5) is designed to detect an adjustment duration (STt) and / or an adjustment speed (STv) of an adjustment of the operating element (4), and for controlling in accordance with the dependency (ZO) when a detected control duration (STt) reaches and / or exceeds a duration limit value (tlimit) and / or when a detected control speed (STv) reaches and / or falls below a speed limit value (vlimit), and - for controlling according to another correlation (ZO') when the detected adjustment duration (STt) is lower than the duration limit value (tlimit) and / or when the detected adjustment speed (STv) exceeds the speed limit value (vlimit), so that for at least one of the different positions (ST), the maximum theoretical slope (maxdntheoretical / dt) according to the other correlation (ZO') is higher relative to the maximum theoretical slope (maxdntheoretical / dt) according to the correlation (ZO).

18. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The control device (5) is designed to detect an adjustment duration (STt) and / or an adjustment speed (STv) of an adjustment of the operating element (4), and for controlling in accordance with the dependency (ZO) when a detected control duration (STt) reaches and / or exceeds a duration limit value (tlimit) and / or when a detected control speed (STv) reaches and / or falls below a speed limit value (vlimit), and - for controlling according to another correlation (ZO') when the detected adjustment duration (STt) is lower than the duration limit value (tlimit) and / or when the detected adjustment speed (STv) exceeds the speed limit value (vlimit), so that for at least one of the different positions (ST), the maximum theoretical slope (maxdntheoretical / dt) according to the other correlation (ZO') is maximum.

19. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The gardening, forestry and / or construction tool (1) has a potentiometer (6), - wherein the operating element (4) is constructed to adjust the value (WG) of the electrical variable (G) of the potentiometer (6), and - wherein the control device (5) is constructed to control the theoretical gradient (dntheoretical / dt) according to the value (WG) of the electrical variable (G) in accordance with the at least one correlation (ZO), so that for different values ​​(WG) of the electrical variable (G), the maximum theoretical gradient (maxdntheoretical / dt) of the rotational speed (n) is different.

20. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The control device (5) is designed to control the torque (M) generated by the motor drive system (3) to achieve the theoretical slope (dntheoretical / dt).

21. The hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 3, -in, The gardening, forestry and / or construction tool (1) is a saw (1'), a pruner, a free cutter, a blower, a leaf blower or a cutter.

22. A method for operating a hand-held gardening, forestry and / or construction working tool (1) according to any one of the preceding claims 1 to 21, wherein: The method comprises the following steps: - According to the at least one correlation (ZO), the theoretical gradient (dntheoretical / dt) of the rotational speed (n) of the electric motor drive system (3) is controlled by means of the control device (5) according to the position (ST) of the operating element (4) so ​​that the maximum theoretical gradient (maxdntheoretical / dt) of the rotational speed (n) is different for the different positions (ST).

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