Handheld garden, forest and / or construction work tool and method of operating the same

Abstract

The present invention relates to a handheld garden, forest and / or construction working tool and a method for operating the same, in particular to a handheld garden, forest and / or construction working tool, which comprises: a cutting tool, which is configured to cut off a workpiece; an electric drive motor, which is configured to drive the cutting tool; a motor operating element, which is adjustable by a user over an adjustment range from a minimum position to a maximum position; and a control device, which is configured to control a set speed of the drive motor according to the position of the motor operating element in at least a first operating mode and a second operating mode, wherein in the first operating mode, the set speed increases with increasing position over at least one section of a minimum of 0.5 times the adjustment range, the increase varying by a maximum of 60% over the section, and in the second operating mode, the set speed increases with increasing position from a maximum of 50% of the adjustment range to a minimum of 0.9 times the maximum set speed of the second operating mode.

Description

Technical Field

[0001] The invention relates to a handheld garden, forestry and / or construction work tool and a method for operating such a handheld garden, forestry and / or construction work tool. Summary of the Invention

[0002] The present invention is based on the object of providing a handheld garden, forest and / or construction work tool and / or a method for operating such a handheld garden, forest and / or construction work tool, which has, in particular respectively has improved properties, in particular is user-friendly.

[0003] The present invention achieves this object by providing a handheld garden, forestry and / or construction tool according to the invention and / or a method according to the invention. Advantageous further developments of the invention are described in the remainder of this disclosure.

[0004] The hand-held (English: hand-portable) garden, forest and / or construction tool according to the invention comprises or has a (particularly movable, in particular rotatable) cutting tool, an electric drive motor, a motor operating element and a (particularly electric) control device, in particular a closed-loop control device. The cutting tool is constructed or arranged for cutting off (particularly a workpiece to be cut). The drive motor is constructed or arranged for (particularly directly or indirectly) driving the cutting tool or for moving the cutting tool (in particular directly or indirectly). The motor operating element is user-adjustable, in particular movable, over an adjustment range, in particular an adjustment stroke, from a minimum position to a maximum position (in particular different from the minimum position), and is in particular constructed or arranged for user-adjustable, in particular over an adjustment range, in particular an adjustment stroke, from a minimum position to a maximum position (in particular different from the minimum position). The control device is designed or configured to control, in particular, closed-loop control, a setpoint speed, in particular, a value of the setpoint speed, of the drive motor in at least a first operating mode and a second operating mode (in particular, different from the first operating mode), or in accordance with at least the first operating mode and the second operating mode, as a function of a position, in particular, a value of the position, of the motor operating element. In the first operating mode, the setpoint speed, in particular, the value of the setpoint speed, increases with increasing position, in particular, with increasing value of the position, over at least a section of a control range of at least 0.5 times, in particular at least 0.6 times, in particular at least 0.7 times, in particular at least 0.8 times, in particular 0.9 times. The amount of increase, in particular, the value of the increase, changes within this section by a maximum of 60 percent (%), in particular by a maximum of 50%, in particular by a maximum of 40%, in particular by a maximum of 30%, in particular by a maximum of 20%, in particular by a maximum of 10%, or in particular does not change. In the second operating mode, the set speed, in particular the value of the set speed, is at least 0.9 times the maximum set speed of the second operating mode, in particular the value of the maximum set speed, as the position increases, in particular as the value of the position increases, from a maximum of 50% or half of the adjustment range, in particular a maximum of 40%, in particular a maximum of 30%, in particular to the end of the adjustment range.

[0005] This, in particular the first operating mode, allows for sensitive or agile metering of the set speed, in particular by means of adjustment, in particular setting of a motor operating element, in particular by a user of the garden, forestry, and / or construction tool. This allows for sensitive or agile processing of workpieces by means of the garden, forestry, and / or construction tool, in particular a cutting tool. Furthermore, this, in particular the second operating mode, allows for rapid reaching of a high set speed without adjusting the motor operating element too far, in particular to its maximum position, or without requiring a further adjustment of the motor operating element. This allows for rapid cutting of the workpiece. This, in particular the first and second operating modes, allows for the versatility of the garden, forestry, and / or construction tool. This makes the garden, forestry, and / or construction tool user-friendly.

[0006] In particular, a handheld, garden, forest and / or construction tool can mean that the garden, forest and / or construction tool can have a mass of maximum 50 kilograms (kg), in particular a maximum of 20 kg, in particular a maximum of 10 kg, in particular a maximum of 5 kg, and / or a minimum of 1 kg, in particular a minimum of 2 kg.

[0007] The workpiece can be wood, grass, stone or metal.

[0008] The drive motor, in particular the rotor of the drive motor, and the cutting tool can be coupled to one another in a non-coupling manner, in particular in a rotationally fixed manner. Additionally or alternatively, the garden, forestry, and / or construction tool does not require or can have a (in particular switchable) transmission, in particular a functional transmission between the drive motor and the cutting tool.

[0009] The motor operating element can be a push-button element, in particular a button, and can be configured as a push-button element, in particular a button. Additionally or alternatively, the motor operating element can have at least three, in particular at least five, different positions. In particular, the motor operating element can be continuously adjustable by the user.

[0010] The segment can start from a starting position of the motor operating element (in particular different from the minimum position) and / or end at a maximum position. Additionally or alternatively, the increment can start at zero or (in particular different from zero) a minimum set speed, in particular the minimum set speed of the first operating mode, and / or end at the maximum set speed of the first operating mode. In particular, the maximum set speed can be at least twice the minimum set speed. Furthermore, additionally or alternatively, the increment can vary by a maximum of 60% from the start of the segment relative to the end of the segment. For example: the start of the segment is 100 arbitrary units (AU) and the end of the segment is 40 AU or 160 AU, or the end of the segment is 100 AU and the start of the segment is 40 AU or 160 AU.

[0011] In the first operating mode, the set speed can be reduced over at least the section as the position decreases. The amount of reduction can vary over the section by a maximum of 60%, in particular by a maximum of 50%, in particular by a maximum of 40%, in particular by a maximum of 30%, in particular by a maximum of 20%, in particular by a maximum of 10%, or in particular by no change.

[0012] In the second operating mode, the set speed can be up to a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30% of the adjustment range, in particular the end of the adjustment range with decreasing position is at least 0.9 times the maximum set speed of the second operating mode.

[0013] In other words: in the first operating mode and / or in the second operating mode, the set speed can be assigned to the position as it decreases, just as it increases. The reduction can only be terminated at a stop position or a shutdown position of the motor operating element (in particular, different from the starting position and / or equal to the minimum position) and / or the reduction can be terminated at a lower minimum set speed, in particular zero.

[0014] The first operating mode, in particular the assignment of the set speed to the position in the first operating mode, and / or the second operating mode, in particular the assignment of the set speed to the position in the second operating mode, can be constant (in particular in each case, in particular except for switching to the other operating mode, in particular over time). Additionally or alternatively, at least the first operating mode and the second operating mode can be permanently set or predefined at the factory or cannot be predefined by the user.

[0015] The set speed can be reached in the unloaded state of the garden, forestry and / or construction tool, in particular of the drive motor.

[0016] The control device can be configured to control the torque generated by the drive motor to achieve a set speed. Additionally or alternatively, the control device can be configured to control the set speed at a point in time in either the first operating mode or the second operating mode. Furthermore, additionally or alternatively, the control device can be configured to control the set speed in the first and second operating modes and at least one third operating mode. Furthermore, additionally or alternatively, the control device can be configured to switch between at least the first operating mode and the second operating mode. Furthermore, additionally or alternatively, the control device can include a microcontroller.

[0017] In an extension of the invention, the garden, forest and / or construction processing tool is a saw, in particular a chain saw, a free cutter or a separating grinder. Additionally or alternatively, the cutting tool is a sawing tool, in particular a saw chain or a saw blade, or a cutting disc. In particular, in the case of a saw, in particular a chain saw, and / or a free cutter and / or a sawing tool, in particular a saw chain or a saw blade, this, in particular the first operating mode, allows for simple felling and / or simple cutting of tree trunks. Additionally, this, in particular the second operating mode, allows for simple removal or cutting of branches and / or simple pruning of saplings. Furthermore, additionally or alternatively, in the case of a separating grinder, this, in particular the second operating mode, allows for close cutting of the workpiece. Additionally, this, in particular the first operating mode, allows for the workpiece to be cut off in time after close cutting.

[0018] In a further development of the present invention, in the first operating mode, the set speed, in particular the value of the set speed, increases linearly over at least the section with increasing position, in particular with increasing value of the position. Alternatively, in the first operating mode, the amount of increase decreases or falls over the section with increasing position, in particular with increasing value of the position. This allows for particularly sensitive metering of the set speed.

[0019] In a further development of the invention, in the second operating mode, the set speed, in particular the set speed value, in particular increases (in particular linearly) from a starting position of the motor operating element (in particular different from the minimum position and / or the maximum position) to a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30% of the adjustment range with increasing position, in particular with increasing position value, in particular from a minimum set speed, in particular the value of the minimum set speed, in particular of the second operating mode (in particular different from zero), to a minimum of 0.9 times the maximum set speed of the second operating mode, in particular to a minimum of 0.9 times the value of the maximum set speed. In particular, the amount of increase, in particular the value of the increase, in particular the amount of increase, in particular the starting position, to a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30%, in particular a maximum of 60%, in particular a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10%, in particular does not change, and / or, in particular from the starting position, to a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30%, in particular a maximum of 30%, in particular a maximum of 20%, in particular a maximum of 10%, decreases or falls with increasing position, in particular with increasing position value. This enables a soft start and / or a slightly more sensitive or more delicate metering of the set speed in the second operating mode, in particular without requiring a switch to the first operating mode.

[0020] In an extension of the present invention, in the second operating mode, the set speed, in particular the value of the set speed, from a maximum of 50%, in particular a maximum of 40%, in particular a maximum of 30% of the adjustment range, in particular to the end of the adjustment range, increases with increasing position, in particular with increasing value of the position, becoming the maximum set speed of the second operating mode, in particular the value of the maximum set speed.

[0021] Additionally or alternatively, the maximum setpoint speed of the second operating mode can be the maximum setpoint speed of all operating modes.

[0022] In one embodiment of the present invention, the maximum set speed of the second operating mode, in particular the value of the maximum set speed, is higher than the maximum set speed of the first operating mode, in particular the value of the maximum set speed. This allows for particularly rapid cutting of workpieces, in particular particularly simple branch removal and / or particularly simple pruning of saplings. In particular, the maximum set speed of the second operating mode can be at least 1.1 times and / or at most 5 times, in particular at most 4 times, in particular at most 3 times, and in particular at most 2 times the maximum set speed of the first operating mode.

[0023] In one embodiment of the present invention, the control device is configured or arranged to control the set speed, in particular the set speed value, by means of field weakening in the drive motor to be at least equal to the maximum set speed, in particular the value of the maximum set speed, for the second operating mode, in particular at least 0.9 times, in particular at least 0.8 times, and in particular at least 0.7 times the maximum set speed for the second operating mode. This allows for a high maximum set speed for the second operating mode. Additionally or alternatively, this allows for an efficiency-optimized design of the drive motor. In particular, a high set speed and the resulting high kinetic energy of the cutting tool may be more important or relevant in some situations, such as delimbing and / or pruning, than high torque. In contrast, at lower set speeds, in some situations, such as felling and / or chopping, high torque may be important or relevant, in particular for freeing the cutting tool. In particular, the control device may be configured to control the set speed by means of field weakening in the drive motor in at least the second operating mode. Additionally or alternatively, the control device may be configured to control the lower set speed by means of MMPA in at least the first and / or second operating modes.

[0024] Alternatively, the control device can be designed to set the rotational speed by means of block commutation control in at least the first operating mode and / or the second operating mode.

[0025] In a further development of the invention, the control device is designed or configured to control the drive motor at a maximum output power, in particular at least 0.8 times the value of the maximum output power (in particular and / or at most the maximum output power of the drive motor) up to a maximum set speed, in particular at least 0.9 times the value of the maximum set speed, in particular up to the maximum set speed of the second operating mode. This allows for good efficiency of the drive motor, in particular despite field weakening (if present).

[0026] In one embodiment of the present invention, the drive motor is a brushless DC motor, a permanent magnet synchronous motor, or an asynchronous motor. Additionally or alternatively, the control device is designed or configured for FOC control (FOC: Field Oriented Control) or DTC control (DTC: Direct Torque Control). This allows the speed to be set by means of field weakening control in at least the second operating mode.

[0027] In one embodiment of the present invention, a garden, forestry, and / or construction tool includes or has an electrical regulating device. The motor operating element is designed or configured to adjust an electrical variable of the regulating device, in particular a value of the variable. The control device is designed or configured to control a set speed, in particular a value of the set speed, as a function of the variable, in particular its value. This allows position-dependent control of the set speed. In particular, the regulating device can include a potentiometer or a Hall sensor, and / or the variable can be a resistance or a Hall voltage.

[0028] In a further development of the present invention, in the first operating mode, the set speed, in particular the value of the set speed, is reduced, in particular linearly, from the set speed last controlled before the reset, in particular the maximum set speed, to zero, in particular when or triggered by the motor operating element being reset to its minimum position, over a coasting time range or a braking time range of the first operating mode. The amount of reduction, in particular the value of the reduction, changes by a maximum of 60%, in particular by a maximum of 50%, in particular by a maximum of 40%, in particular by a maximum of 30%, in particular by a maximum of 20%, in particular by a maximum of 10%, or in particular does not change, over a minimum of 0.9 times the coasting time range, in particular over the coasting time range.

[0029] This enables a particularly sensitive or delicate metering of the set speed.

[0030] Additionally or alternatively, in the second operating mode, the set speed, in particular the value of the set speed, is reduced from the set speed last controlled before the reset, in particular the maximum set speed, to zero in time over the coasting time range or braking time range of the second operating mode when or triggered by the motor operating element being reset to its minimum position, and is reduced in its early half, in particular in the early half of its coasting time range by a maximum of 0.5 times, in particular a maximum of 0.25 times, in particular not reduced in its late half, in particular in the late half of its coasting time range.

[0031] This allows the set speed to be maintained for a relatively long time within the range of the set speed last controlled before the reset. This allows the set speed, in particular a high set speed, in particular the maximum set speed, to be reached particularly quickly when the motor operating element is readjusted.

[0032] In particular, the coasting time range of the first operating mode can be the same length as the coasting time range of the second operating mode. Additionally or alternatively, the coasting time range of the first operating mode and / or the coasting time range of the second operating mode can be (in particular, respectively) longer by a maximum of 5 seconds, in particular by a maximum of 2 seconds, and / or by a minimum of 0.1 seconds, in particular by a minimum of 0.2 seconds, and in particular by a minimum of 0.5 seconds. Furthermore, additionally or alternatively, the reduction can vary by a maximum of 60% from the beginning of the coasting time range of the first operating mode to the end of the coasting time range of the first operating mode. For example, the beginning of the coasting time range is 100 seconds, while the end of the coasting time range is 40 seconds or 160 seconds, or the end of the coasting time range is 100 seconds, while the beginning of the coasting time range is 40 seconds or 160 seconds. Furthermore, additionally or alternatively, in the first operating mode and / or the second operating mode, the reduction can be performed by idling, in particular without active braking, recuperation, or recuperative braking, in particular after idling, and by short-circuiting braking, in particular after recuperation, in particular by means of the control device. In particular, these three steps can be of different durations or performed or implemented with different weightings in the first operating mode and in the second operating mode.

[0033] In one embodiment of the present invention, the garden, forestry, and / or construction tool includes or has a motor-operated reset element. The motor-operated reset element is designed or configured to apply a force to the motor-operated element to reset it to its minimum position. This allows the set speed to be reduced (in particular automatically) when the adjusted motor-operated element is weakened, in particular released. In particular, the motor-operated reset element can include a spring, in particular, the motor-operated reset element can be a spring. Additionally or alternatively, the potentiometer (if present) can be self-resetting, in particular, designed to be self-resetting.

[0034] In a further development of the present invention, the garden, forestry, and / or building processing tool comprises or has a user-operable switching element, in particular a user-movable switching element. The control device is designed or configured to switch between at least a first operating mode and a second operating mode, triggered by actuation of the switching element. This allows for simple adjustment of the garden, forestry, and / or building processing tool to the corresponding processing task, in particular by the user. In particular, the switching element can be different from a motor-operated element. Additionally or alternatively, the switching element can be a push-button element, in particular, configured as a push-button element. Furthermore, additionally or alternatively, the switching element can be self-resetting, in particular, configured as a self-resetting element.

[0035] In one embodiment of the present invention, the garden, forestry, and / or construction tool includes or has a (particularly electrical) output device, in particular a display. The output device is designed or configured to (particularly automatically) output, in particular display, user-perceivable information about control in or according to at least the first or second operating mode. This provides feedback to the user. In particular, the display can include at least one LED, and in particular, the display can be at least one LED.

[0036] The method according to the invention is designed or configured for (in particular automatically) operating a handheld garden, forestry and / or construction tool, in particular the handheld garden, forestry and / or construction tool described above. The method comprises or has the following steps: in at least (in particular either) a first operating mode or a second operating mode, a setpoint speed of a drive motor is controlled, in particular automatically, by means of a control device as a function of the position of a motor operating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Further advantages and aspects of the present invention are apparent from the claims and from the following description of preferred exemplary embodiments of the present invention, which are explained below with reference to the accompanying drawings.

[0038] Figure 1 A handheld garden, forestry and / or construction work tool according to the invention and a method according to the invention for operating a garden, forestry and / or construction work tool are schematically shown.

[0039] Figure 2 The set speed of the drive motor in the first operating mode is shown in FIG. Figure 1 a diagram of the position of a motor operating element of a garden, forestry and / or construction tool and a diagram of the set speed in a second operating mode as a function of the position,

[0040] Figure 3 A line graph showing the torque of the drive motor versus the set speed,

[0041] Figure 4 a line graph showing the maximum output power of the drive motor versus the set speed, and

[0042] Figure 5 A diagram showing the set speed over time in a first operating mode and a diagram showing the set speed over time in a second operating mode are shown. DETAILED DESCRIPTION

[0043] Figure 1 A handheld garden, forest and / or building work tool 1 according to the invention and a method according to the invention for operating a handheld garden, forest and / or building work tool 1 are shown. The garden, forest and / or building work tool 1 comprises a cutting tool 2, an electric drive motor 3, a motor operating element 4 and a control device 5. The cutting tool 2 is designed for cutting a workpiece, in particular the cutting tool cuts the workpiece. The drive motor 3 is designed for driving the cutting tool 2, in particular the drive motor drives the cutting tool. The motor operating element 4 can be adjusted by the user over an adjustment range SB from a minimum position minST to a maximum position maxST, in particular the motor operating element can be adjusted over an adjustment range SB from a minimum position to a maximum position, as shown. Figure 2 The control device 5 is configured to operate in at least a first operating mode BM1 (e.g. Figure 2 In the second operating mode BM2 (as shown on the left) Figure 2 (shown on the right in the figure) controls the set speed nset of the drive motor 3 according to the position ST of the motor operating element 4. In particular, the control device controls the set speed of the drive motor according to the position of the motor operating element in at least the first operating mode and the second operating mode. In the first operating mode BM1, the set speed nset is at least 0.5 times the setting range SB (in Figure 2 As position ST increases, the setpoint speed nset2 increases over at least one section AS, AS' (in the exemplary embodiment shown on the left by the solid line, by a factor of 0.5). The amount of increase ZU1, ZU1' changes by a maximum of 60% over sections AS, AS'. In the second operating mode BM2, starting from a maximum of 50% of the control range SB, in particular starting from a maximum of 50% of sections AS, AS', as position ST increases, it is at least 0.9 times the maximum setpoint speed maxnset2 of the second operating mode BM2.

[0044] The method comprises the following steps: in at least the first operating mode BM1 or the second operating mode BM2 , a setpoint speed nsoll of the drive motor 3 is controlled by means of the control device 5 as a function of the position ST of the motor operating element 4 .

[0045] exist Figure 2 In the embodiment shown by the solid line on the left in FIG, the segment AS starts from the minimum position minST and ends at the maximum position maxST. In an alternative embodiment, the segment can start from a starting position of the motor operating element that is different from the minimum position. Figure 2 In the embodiment shown by the dashed line on the left, the increment ZU1 ′ starts from a starting position SAS′ of 4% and ends at a position of 75%.

[0046] In particular, the minimum position minST is 0%. Additionally, the maximum position maxST is 100%.

[0047] Additionally, in Figure 2 In the embodiment shown by the solid line on the left in FIG, the increase ZU1 starts with a minimum set speed minnset1 equal to zero and ends with a maximum set speed maxnset1 of the first operating mode BM1. In an alternative embodiment, the increase can start with a minimum set speed not equal to zero. In particular, Figure 2 In the embodiment shown by the dashed line on the left, the increase ZU1 ′ starts with a minimum set speed minnsoll1 ′ of 4000 revolutions per minute (R / min).

[0048] Additionally, in the illustrated embodiment, the garden, forestry and / or construction tool 1 is a saw 1 ′, in particular a chain saw 1 ″. In alternative embodiments, the garden, forestry and / or construction tool can be a saw or a cutter.

[0049] Additionally, in the illustrated embodiment, the cutting tool 2 is a sawing tool 2 ′, in particular a saw chain 2 ″. In alternative embodiments, the cutting tool can be a saw blade or a cutting wheel.

[0050] In detail, Figure 2 In the exemplary embodiment shown by the solid line on the left, in the first operating mode BM1 , the setpoint speed nsoll increases linearly with increasing position ST over at least the section AS.

[0051] Alternatively, in Figure 2 In the embodiment shown by the dashed line on the left, in the first operating mode BM1 , the increase ZU1 ′ decreases over the section AS′ as the position ST increases.

[0052] Furthermore, in the second operating mode BM2, the speed nsoll is set, in particular from the motor operating element 4 (in Figure 2The starting position SAS, SAS' (in the embodiment shown by the solid line on the right, which is equal to the minimum position minST) up to a maximum of 50% of the control range BS increases with increasing position ST, in particular from the minimum set speed minnsoll2, minnsoll2' (in Figure 2 In the embodiment shown by the solid line on the right, the minimum set speed is equal to zero) increases to a minimum of 0.9 times the maximum set speed maxnsoll2 of the second operating mode BM2, Figure 2 In the embodiment shown by the solid line on the right, the increase is linear. In particular, the increase ZU2, ZU2', in particular from the starting position SAS, SAS', to a maximum of 50% of the adjustment range SB is changed by a maximum of 60%, in Figure 2 In the embodiment shown by the solid line on the right, the position ST is not changed and / or, in particular, is reduced from the starting position SAS' to a maximum of 50% of the adjustment range SB as the position ST increases, in particular Figure 2 In the embodiment shown by the dashed line on the right. In an alternative embodiment, the increase can start at a minimum set speed that is not equal to zero. In particular, Figure 2 In the embodiment shown by the dashed line on the right, the increment ZU2' starts with a minimum set speed minnsoll2' of 4000 R / min. Additionally or alternatively, Figure 2 In the exemplary embodiment shown by the dashed line on the middle right, in the second operating mode BM2 , the setpoint speed nsoll is increased from a starting position SAS′ of 4%.

[0053] Furthermore, in the second operating mode BM2 , starting from a maximum of 50% of the control range SB and increasing with position ST, the setpoint speed nsetpoint is the maximum setpoint speed maxnsetpoint2 of the second operating mode BM2 .

[0054] Furthermore, the maximum setpoint speed maxnset2 of the second operating mode BM2 is higher than the maximum setpoint speed maxnset1 of the first operating mode BM1.

[0055] Furthermore, the control device 5 is designed to control the set speed nsoll by means of field weakening in the drive motor 3 to be at least equal to the maximum set speed maxnsoll2 of the second operating mode BM2, in particular to at least 0.9 times the maximum set speed of the second operating mode, in particular the control device controls the set speed by means of field weakening in the drive motor to be at least equal to the maximum set speed maxnsoll2 of the second operating mode BM2, in particular to at least 0.9 times the maximum set speed of the second operating mode, as Figure 3 As shown in .

[0056] In the embodiment shown, the control device 5 is designed to control the setpoint speed nsoll in the second operating mode BM2 without the aid of field weakening in the drive motor 3. In an alternative embodiment, the control device can be designed to control the setpoint speed in at least the second operating mode with the aid of field weakening in the drive motor. In particular, Figure 3 Indicated by the dotted line.

[0057] Furthermore, the control device 5 is designed to control up to at least 0.9 times the maximum set speed maxnsoll2 of the second operating mode BM2 with at least 0.8 times the maximum output power P3 of the drive motor 3, in particular the control device controls up to at least 0.9 times the maximum set speed of the second operating mode with at least 0.8 times the maximum output power of the drive motor, as Figure 4 As shown in .

[0058] Furthermore, in the embodiment shown, the drive motor 3 is a brushless DC motor 3', such as Figure 1 In an alternative embodiment, the drive motor can be a permanent magnet synchronous motor or an asynchronous motor.

[0059] Additionally, the control device 5 is designed to carry out an FOC control or a DTC control, in particular the control device carries out an FOC control or a DTC control.

[0060] Furthermore, the garden, forest and / or construction tool 1 has an electric regulating device 6. The motor operating element 4 is designed to adjust an electric variable G of the regulating device 6, in particular the motor operating element adjusts an electric variable of the regulating device. The control device 5 is designed to control the set speed nsoll as a function of the variable G, in particular the control device controls the set speed as a function of the variable, such as Figure 2 As shown in .

[0061] Furthermore, in the first operating mode BM1, the setpoint speed nset1 is reduced from the setpoint speed last controlled before the reset, in particular the maximum setpoint speed maxnset1, to zero over the coasting time range AZB1 of the first operating mode BM1 when the motor operating element 4 is reset to its minimum position minST, as shown in FIG. Figure 5 The reduction AB1 changes by a maximum of 60% over a minimum of 0.9 times the coasting time range AZB1.

[0062] Additionally, in the second operating mode BM2, the setpoint speed nset is reduced from the setpoint speed last controlled before the reset, in particular the maximum setpoint speed maxnset2, to zero over the coasting time range AZB2 of the second operating mode BM2 when the motor operating element 4 is reset to its minimum position minST, by a maximum of 0.5 times in its first half AZB2H' as in its second half AZB2H", as shown in FIG. Figure 5 Shown in the middle right.

[0063] Furthermore, the garden, forest and / or construction tool 1 has a motor-operated element, a reset element 7, such as Figure 1 The motor operating element reset element 7 is designed to act upon the motor operating element 4 with a force for returning it to its minimum position minST, in particular the motor operating element reset element acts upon the motor operating element with a force.

[0064] Furthermore, the garden, forestry and / or construction tool 1 has a user-operable switching element 8. The control device 5 is designed to switch between at least a first operating mode BM1 and a second operating mode BM2 triggered by actuation of the switching element 8, in particular, the control device switches between at least the first operating mode and the second operating mode triggered by actuation of the switching element.

[0065] Furthermore, the garden, forest and / or construction tool 1 has an output device 9. The output device 9 is designed to output user-perceivable information BInfo about the control in at least the first operating mode BM1 or the second operating mode BM2, in particular the output device outputs user-perceivable information about the control in at least the first operating mode or the second operating mode.

[0066] In the illustrated embodiment, the maximum set speed maxnset1 of the first operating mode BM1 is 11,000 rpm. Additionally or alternatively, the maximum set speed maxnset2 of the second operating mode BM2 is 13,500 rpm. In an alternative embodiment, the maximum set speed of the second operating mode can be up to 35,000 rpm. Furthermore, additionally or alternatively, in the first operating mode BM1 and / or in the second operating mode BM2, the (particularly usable) maximum output power P3 of the drive motor 3 is 3,000 watts (W), in particular 3,000 watts (W) in each case. Furthermore, additionally or alternatively, in the first operating mode BM1 and / or in the second operating mode BM2, a freewheeling function, in particular a freewheeling function for the cutting tool 2, is switched on or activated, in particular respectively switched on or activated.

[0067] Furthermore, in the illustrated embodiment, the control device 5 is configured to control the set speed nset1 in the first operating mode BM1 and the second operating mode BM2. In particular, the control device controls the set speed in the first and second operating modes. In an alternative embodiment, the control device can be configured to control the set speed in the first and second operating modes and at least one third operating mode. In particular, the control device controls the set speed in the first and second operating modes and at least one third operating mode. In particular, the third operating mode can be identical to the first operating mode except for the following differences. The maximum set speed in the third operating mode can be lower than the maximum set speed in the first operating mode. In particular, the maximum set speed in the third operating mode can be 9,000 rpm. Additionally or alternatively, in the third operating mode, the maximum output power (in particular, released), and therefore the maximum torque generated by the drive motor, can be lower than the maximum output power and, in particular, the maximum torque in the first operating mode. In particular, the maximum output power of the drive motor can be between 2100 W and 2300 W. Additionally or alternatively, the freewheeling function can be deactivated or disabled in the third operating mode. Furthermore, additionally or alternatively, the first operating mode BM1 can be referred to as a full-power mode or a normal mode. Furthermore, additionally or alternatively, the second operating mode BM2 can be referred to as a speed mode. Furthermore, additionally or alternatively, the third operating mode can be referred to as an energy-saving mode.

[0068] Furthermore, in the illustrated embodiment, the garden, forestry, and / or construction tool 1, in particular the drive motor 3 and / or the control device 5, is designed for electrical connection to a battery 10. In alternative embodiments, the garden, forestry, and / or construction tool can additionally or alternatively be designed for electrical connection to a cable.

[0069] Furthermore, in the embodiment shown, the cutting tool 2 and the drive motor 3 are coupled, in particular mechanically coupled, as shown. Figure 1 In addition, the drive motor 3 and the control device 5 are connected, in particular electrically connected, as shown in FIG. Figure 1 Indicated by dotted lines. Furthermore, the control device 5 is coupled to the potentiometer 6, in particular electrically. Furthermore, the potentiometer 6 is coupled to the motor operating element 4, in particular mechanically. Furthermore, the motor operating element 4 is coupled to the motor operating element reset element 7, in particular mechanically. Furthermore, the control device 5 is coupled to the switching operating element 8, in particular electrically. Furthermore, the control device 5 is coupled to the output device 9, in particular electrically.

[0070] As the embodiments shown and explained above clearly illustrate, the present invention provides an advantageous handheld garden, forest and / or construction work tool and / or an advantageous method for operating such a handheld garden, forest and / or construction work tool, which has, in particular, respectively has improved properties, in particular is user-friendly.

Claims

1. A hand-held garden, forest and / or construction tool (1), wherein: The garden, forest and / or construction processing tool (1) comprises: - a cutting tool (2), wherein the cutting tool (2) is configured to cut off a workpiece; an electric drive motor (3), wherein the drive motor (3) is designed to drive the cutting tool (2); a motor operating element (4), wherein the motor operating element (4) is adjustable by a user over an adjustment range (SB) from a minimum position (minST) to a maximum position (maxST); and - a control device (5), wherein the control device (5) is designed to control a setpoint speed (nset) of the drive motor (3) in at least a first operating mode (BM1) and a second operating mode (BM2) as a function of a position (ST) of the motor operating element (4), wherein, in the first operating mode (BM1), the setpoint speed (nsoll) increases with increasing position (ST) over at least one section (AS, AS') of at least 0.5 times the adjustment range (SB), wherein the increase (ZU1, ZU1') of the setpoint speed (nsoll) varies by a maximum of 60% over the section (AS, AS'), and wherein, in the second operating mode (BM2), the setpoint speed (nset2) is at least 0.9 times the maximum setpoint speed (maxnset2) of the second operating mode (BM2) starting from a maximum of 50% of the control range (SB) as the position (ST) increases.

2. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, The garden, forest and / or construction tool (1) is a saw (1'), a free cutter or a split grinder, and / or - wherein the cutting tool (2) is a sawing tool (2'), or a cutting blade.

3. The handheld garden, forest and / or construction tool (1) according to claim 2, -in, The garden, forest and / or construction tool (1) is a chain saw (1"), and - wherein the cutting tool (2) is a saw chain (2").

4. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, In the first operating mode (BM1), the setpoint speed (nset) increases linearly with increasing position (ST) over at least the section (AS), or - wherein, in the first operating mode (BM1), the increase (ZU1') decreases over the section (AS') as the position (ST) increases.

5. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, In the second operating mode (BM2), the setpoint speed (nset2) increases from a starting position (SAS, SAS') of the motor operating element (4) to a maximum of 50% of the adjustment range (SB) with increasing position (ST) from a minimum setpoint speed (minnset2, minnset2') to a minimum of 0.9 times the maximum setpoint speed (maxnset2) of the second operating mode (BM2).

6. The handheld garden, forest and / or construction tool (1) according to claim 5, in, The increase (ZU2, ZU2') varies from the starting position (SAS, SAS') to a maximum of 50% of the adjustment range (SB) by a maximum of 60% and / or decreases with increasing position (ST).

7. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, In the second operating mode (BM2), starting from a maximum of 50% of the control range (SB) as the position (ST) increases, the setpoint speed (nset2) is a maximum setpoint speed (maxnset2) of the second operating mode (BM2).

8. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, The maximum setpoint speed (maxnset2) of the second operating mode (BM2) is higher than the maximum setpoint speed (maxnset1) of the first operating mode (BM1).

9. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, The control device (5) is designed to control the setpoint speed (nset2) to be at least equal to the maximum setpoint speed (maxnset2) of the second operating mode (BM2) by means of field weakening in the drive motor (3).

10. The handheld garden, forest and / or construction tool (1) according to claim 9, -in, The control device (5) is designed to control the setpoint speed (nset2) to at least 0.9 times the maximum setpoint speed (maxnset2) of the second operating mode (BM2) by means of field weakening in the drive motor (3).

11. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, The control device (5) is designed to control up to a minimum of 0.9 times the maximum setpoint speed (maxnset2) of the second operating mode (BM2) at a minimum of 0.8 times the maximum output power (P3) of the drive motor (3).

12. The handheld garden, forest and / or construction tool (1) according to claim 1, -in, The drive motor (3) is a brushless DC motor (3') or a permanent magnet synchronous motor or an asynchronous motor, and / or - wherein the control device (5) is configured to perform FOC control or DTC control.

13. The handheld garden, forest and / or construction tool (1) according to any one of claims 1 to 12, -in, The garden, forest and / or construction tool (1) has an electric regulating device (6), wherein the motor operating element (4) is designed for adjusting an electrical variable (G) of the adjusting device (6), and - wherein the control device (5) is designed to control the setpoint speed (nset) as a function of the variable (G).

14. The handheld garden, forest and / or construction tool (1) according to any one of claims 1 to 12, -in, In the first operating mode (BM1), when the motor operating element (4) is reset to its minimum position (minST), the setpoint speed (nset) is reduced from the setpoint speed last controlled before the reset to zero over a coasting time range (AZB1) of the first operating mode (BM1), wherein the reduction (AB1) of the setpoint speed (nset) varies by a maximum of 60% over a minimum of 0.9 times the coasting time range (AZB1), and / or - wherein, in the second operating mode (BM2), the set speed (nsoll) is reduced from the set speed last controlled before the resetting to zero over the coasting time range (AZB2) of the second operating mode (BM2) when the motor operating element (4) is reset to its minimum position (minST), and is reduced in its first half (AZB2H') by a maximum of 0.5 times as much as in its second half (AZB2H"), over the coasting time range (AZB2) of the second operating mode (BM2).

15. The handheld garden, forest and / or construction tool (1) according to claim 14, -in, In the first operating mode (BM1), the setpoint speed (nset1) is reduced from a maximum setpoint speed (maxnset1) to zero over a coasting time range (AZB1) of the first operating mode (BM1) when the motor operating element (4) is reset to its minimum position (minST), wherein the reduction (AB1) varies by a maximum of 60% over a minimum of 0.9 times the coasting time range (AZB1), and / or - wherein, in the second operating mode (BM2), the setpoint speed (nset2) is reduced from the maximum setpoint speed (maxnset2) to zero over the coasting time range (AZB2) of the second operating mode (BM2) when the motor operating element (4) is reset to its minimum position (minST), and is reduced in its first half (AZB2H') by a maximum of 0.5 times as much as in its second half (AZB2H"), 16. The handheld garden, forest and / or construction tool (1) according to any one of claims 1 to 12, -in, The garden, forestry and / or construction tool (1) has a motor operating element reset element (7), wherein the motor operating element reset element (7) is designed to act on the motor operating element (4) with a force for resetting it into its minimum position (minST).

17. The handheld garden, forest and / or construction tool (1) according to any one of claims 1 to 12, -in, The garden, forest and / or construction tool (1) has a switching operating element (8) that can be actuated by a user, and - wherein the control device (5) is configured to switch between at least the first operating mode (BM1) and the second operating mode (BM2) in a manner triggered by actuating the switching operating element (8).

18. The handheld garden, forest and / or construction tool (1) according to any one of claims 1 to 12, -in, The garden, forest and / or building processing tool (1) has an output device (9), wherein the output device (9) is designed to output user-perceivable information (BInfo) about the control in at least the first operating mode (BM1) or the second operating mode (BM2).

19. Method for operating a handheld garden, forestry and / or construction tool (1) according to any one of claims 1 to 18, wherein: The method comprises the following steps: In at least the first operating mode (BM1) or the second operating mode (BM2), a setpoint speed (nset) of the drive motor (3) is controlled by means of the control device (5) as a function of the position (ST) of the motor operating element (4).

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