Method for operating a manually guided processing device and manually guided processing device

Abstract

The invention relates to a method for operating a manually guided machining device (1), wherein the machining device (1) has: a rotating and / or revolving cutting tool (2), an electric motor drive system (3), wherein the electric motor drive system (3) is designed to generate a torque (M) for driving the cutting tool (2), and a user-operable operating element (4), wherein the method has the following steps: a) automatically monitoring whether a blocking criterion (BK) is met, wherein the blocking criterion (BK) characterizes a blocking of the cutting tool (2), and b) if the blocking criterion (BK) is met and the operating element (4) is operated, automatically reducing the torque (M) generated by the electric motor drive system (3) and automatically increasing the torque (M) generated by the electric motor drive system (3) over time.

Description

Technical Field

[0001] The invention relates to a method for operating a manually guided processing device and to a manually guided processing device. Summary of the Invention

[0002] The present invention is based on the object of providing a method for operating a manually guided processing device and a manually guided processing device which respectively have improved properties.

[0003] The invention achieves this object by providing a method having the features of claim 1 and a manually guided processing device having the features of claim 15. Advantageous developments and / or embodiments of the invention are described in the dependent claims.

[0004] The particularly automatic method according to the invention is constructed or configured for the particularly automatic operation of a manually guided processing device. The processing device comprises a rotating and / or revolving or swiveling cutting tool, an electric motor drive system and a user-operable operating element. The electric motor drive system is constructed or configured for generating a torque for driving the cutting tool, in particular for rotating and / or revolving the cutting tool. The method comprises the following steps: a) automatically or autonomously monitoring, in particular independently of a user of the processing device, whether a blocking criterion or a jamming criterion is met or in particular not met. The blocking criterion characterizes a blocking of the cutting tool. b) if the blocking criterion is met and the operating element is operated or when the blocking criterion is met and the operating element is operated, then, in particular independently of the operation of the operating element by the user, automatically or autonomously reducing the torque generated by the electric motor drive system and automatically or autonomously increasing the torque generated by the electric motor drive system over time.

[0005] When operating a processing device, in particular when the cutting tool rotates and / or circles, the cutting tool can become blocked or stuck by the workpiece to be cut or a solid object in the workpiece, in particular when the feed force is too high. The method enables the cutting tool to break free automatically or without user control or adjustment. Thus, this enables the cutting tool to be automatically unblocked. Additionally or alternatively, this enables the user to perceive, in particular tactilely and / or acoustically, the blockage and thus to reduce the load on the cutting tool, in particular to reduce the feed force. Thus, this enables the cutting tool to be unblocked. This in particular enables the user of the processing device to not need to change, in particular interrupt, the operation of an operating element.

[0006] This method can be referred to in particular as a free-running function.

[0007] The processing equipment can be a floor-standing or portable processing equipment. Additionally or alternatively, a manually guided, in particular portable processing equipment can mean that the processing equipment can have a mass of a maximum of 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. Furthermore, additionally or alternatively, the processing equipment can be gardening, forestry, and / or construction processing equipment.

[0008] The method and / or processing device, in particular the electric motor drive system, can be configured to rotate and / or revolve the cutting tool in one direction, in particular only in one direction, in particular in a single direction, in particular in the direction of rotation. In other words, the method and / or processing device, in particular the electric motor drive system, need not or cannot be configured to rotate and / or revolve the cutting tool in the opposite direction or for reversing direction, in particular if a blocking criterion is met. Additionally or alternatively, the rotation and / or revolving can describe the shape of a closed curve.

[0009] The method and / or processing device, in particular the electric motor drive system, can be configured to generate a torque as a function of the actuation of an operating element. Additionally or alternatively, the method and / or processing device, in particular the electric motor drive system, can be configured to detect whether the operating element is actuated or, in particular, not actuated, using a switching element of the processing device. The operating element can, in particular, be configured to actuate the switching element.

[0010] The processing equipment does not need to have an internal combustion engine drive system or can be without an internal combustion engine drive system.

[0011] If the processing device is switched on, the method can be carried out. In other words, if the processing device is not switched on or is switched off, the method does not need to be carried out or cannot be carried out. Additionally or alternatively, step a) can be carried out if the operating element is actuated. In other words, if the operating element is not actuated, step a) does not need to be carried out or cannot be carried out. Furthermore, additionally or alternatively, step a) can be carried out continuously. Furthermore, additionally or alternatively, if the blocking criterion is not met and / or the operating element is not actuated, step b) does not need to be carried out or cannot be carried out. In other words, step b) can be carried out until the blocking criterion is no longer met. Furthermore, additionally or alternatively, step b) can be carried out simultaneously with and / or temporally after step a).

[0012] In step b), the torque can be reduced from a value for a situation in which the blocking criterion would not be met. Additionally or alternatively, the electric motor drive system can be designed to generate the torque using pulse duration modulation, in particular pulse width modulation. In step b), the reduction and / or increase of the pulse duration modulation can be different and / or can each extend temporally over multiple pulses of the pulse duration modulation.

[0013] “Automatically” can mean independently of a user, in particular independently of an actuation of an operating element by a user.

[0014] In a refinement of the present invention, the processing device is a saw, in particular a chain saw, a brush cutter, a lawn mower, a rock drill, or a cutter. Additionally or alternatively, the cutting tool comprises a saw chain, a saw blade, a cutting disc, a cutting tool, a grinding chain, or a grinding disk. The cutting tool is in particular a saw chain, a saw blade, a cutting disc, a cutting tool, a grinding chain, or a grinding disk.

[0015] In a further development of the invention, the electric motor drive, in particular the rotor of the electric motor drive, and the cutting tool are coupled or connected to one another clutchlessly, in particular rotationally fixedly, in particular mechanically. This allows the torque generated by the electric motor drive to be transmitted to the cutting tool without slip.

[0016] In a refinement of the present invention, the blocking criterion is that despite an operating element being operated in a particularly maximum manner and / or despite a torque greater than zero being generated in a particularly maximum manner and / or despite a current greater than zero that causes the torque to be generated in a particularly maximum manner, the rotational speed of the electric motor drive system and / or the cutting tool is equal to or less than a blocking speed lower limit value. This enables the identification or monitoring of blocking of the cutting tool. The blocking speed lower limit value can in particular be less than the value of the rotational speed that is common for the following situation, i.e., when the cutting tool is not blocked. The blocking speed lower limit value can in particular be zero. Additionally or alternatively, the method and / or the processing device, in particular the electric motor drive system, can be configured to control or regulate a theoretical speed of the electric motor drive system or the cutting tool that is only greater than, in particular and not less than, the blocking speed lower limit value. Further additionally or alternatively, the rotational speed or rotation and / or rotation of the electric motor drive system and / or the cutting tool can be defined relative to, in particular relative to, the housing of the processing device and / or the handle and / or the operating element of the processing device.

[0017] In a refinement of the present invention, step b) is repeated automatically or autonomously, in particular until a repetition limit is reached, and in particular independently of any user operation of an operating element. This provides a particularly high probability of unblocking the cutting tool. Additionally or alternatively, this allows the user to be particularly aware of any blockage. The repetition limit can, in particular, be factory-set and / or user-adjustable. Additionally or alternatively, upon reaching the repetition limit, step b) need not or can no longer be repeated.

[0018] In a refinement, in particular a configuration, of the present invention, the automatic reduction, in particular the automatic reduction of step b), is carried out with a reduction duration of at least 1 millisecond (ms), in particular at least 20 ms, and / or at most 2 seconds (s), in particular at most 500 ms, in particular 50 ms. Additionally or alternatively, the automatic increase, in particular the automatic increase of step b), is carried out with an increase duration of at least 1 ms, in particular at least 20 ms, and / or at most 2 s, in particular at most 500 ms, in particular 50 ms. Furthermore, additionally or alternatively, the automatic increase, in particular the automatic increase of step b), is carried out after a pause duration of at least 1 ms, in particular at least 20 ms, and / or at most 2 s, in particular at most 500 ms, in particular 250 ms, after the automatic reduction, in particular the automatic reduction of step b). Additionally or alternatively, during the repetition of step b) (if any), the automatic reduction, in particular the automatic reduction of step b), is carried out after a holding period of at least 0 ms and / or at most 2 s, in particular at most 500 ms, and after the automatic increase, in particular the automatic increase of step b). This allows the user to perceive the blockage particularly well. Additionally or alternatively, this, in particular the increase duration, provides a particularly high probability of unblocking the cutting tool. The reduction duration and / or increase duration can in particular each be longer than the pulses of the pulse-duration modulation, if any. The pulses can in particular have a pulse duration of approximately 62.5 microseconds (equivalent to 16 kHz).

[0019] In a refinement of the present invention, the method includes the following step: c) if the blocking criterion is not met and the operating element is actuated, or when the blocking criterion is not met and the operating element is actuated, automatically or autonomously controlling or automatically or autonomously regulating the torque generated by the electric motor drive system to achieve a theoretical rotational speed, in particular a value for the theoretical rotational speed, of the electric motor drive system and / or the cutting tool, particularly independent of user operation of the operating element. This enables the cutting tool to cut the workpiece to be cut. If the blocking criterion is met and / or the operating element is not actuated, step c) is not necessary or cannot be performed. In other words, step c) can be performed until the blocking criterion is met. Additionally or alternatively, step c) can be performed before and / or after step b). In other words, at a given point in time, either step c) or step b) can be performed. Furthermore, additionally or alternatively, step c) can be performed simultaneously with and / or after step a). Additionally or alternatively, in step b), the torque can be reduced from a value for reaching a setpoint speed, in particular the setpoint speed of the preceding step c). Additionally or alternatively, the setpoint speed can be dependent on an actuation of an operating element.

[0020] In one embodiment of the present invention, the non-blocking speed lower limit value is greater than the blocking speed lower limit value for the theoretical speed, in particular the theoretical speed of step c), in particular at least twice as great as the blocking speed lower limit value. This prevents the blocking criterion from being met even though the cutting tool is not blocked.

[0021] In one embodiment of the present invention, in step c), the automatic or autonomous increase in the generated torque or the current causing the torque is limited to a non-blocking upper limit, in particular independently of the operation of an operating element by a user. In step b), the torque or current is reduced, in particular, from the non-blocking upper limit. Additionally or alternatively, in step b), the automatic increase in the generated torque or current is limited to a blocking upper limit. Further additionally or alternatively, in step b), the automatic reduction in the generated torque or current is limited to a blocking lower limit greater than zero. The blocking lower limit is in particular a minimum of 0.1 times and / or a maximum of 0.25 times the blocking upper limit. The non-blocking upper limit and / or the blocking upper limit avoid overloading the electric motor drive system and / or the cutting tool. Additionally or alternatively, a blocking lower limit greater than zero provides a particularly high probability that the cutting tool will break free. Further additionally or alternatively, a blocking lower limit greater than zero enables the user to perceive the operation of the processing device, in particular the electric motor drive system. Furthermore, additionally or alternatively, in particular compared to a lower blocking limit value of zero, a lower blocking limit value greater than zero allows, in particular without a sensor for directly detecting the condition, in particular indirect detection of a condition or position of a rotor or a cutting tool of the electric motor drive system by using current and / or voltage information of the electric motor drive system. The upper blocking limit value can in particular be greater than, equal to, or less than the upper non-blocking limit value.

[0022] In one embodiment of the present invention, the upper blocking limit value depends on the number of repetitions of step b), and the upper blocking limit value is particularly reduced, in particular automatically, depending on the number of repetitions of step b). This avoids overloading of the electric motor drive system and / or the cutting tool.

[0023] In one embodiment of the present invention, the method includes the following steps: detecting, in particular automatically detecting, in particular monitoring, a temperature, in particular a temperature value, of an electric motor drive system and / or a battery electrically connected to the processing device. A repetition limit value, a non-blocking upper limit value, and / or a blocking upper limit value are dependent on the detected temperature. The repetition limit value, the non-blocking upper limit value, and / or the blocking upper limit value are adjusted, in particular automatically adjusted, in particular reduced, in particular depending on the detected temperature. This prevents overloading and / or shutting down of the electric motor drive system and / or the battery. In particular, the temperature can be the temperature of the electronics, in particular the power electronics, and / or the electric motor of the electric motor drive system. Additionally or alternatively, the battery can be configured to supply the processing device, in particular the electric motor drive system, with electrical drive power. Furthermore, additionally or alternatively, the repetition limit value, the non-blocking upper limit value, and / or the blocking upper limit value can be reduced based on the detected temperature when a temperature limit value is reached and / or exceeded.

[0024] In one embodiment of the present invention, the processing equipment is constructed or configured for electrical connection to different types of batteries. The different types of batteries have different maximum current values. The processing equipment is electrically connected to one of the different types of batteries. The method comprises the following steps: detecting, in particular automatically detecting, the type of the electrically connected battery and determining, in particular automatically determining, the maximum current value based on the detected type and / or detecting, in particular automatically detecting, the maximum current value of the electrically connected battery. The non-blocking upper limit value and / or the blocking upper limit value depend on the maximum current value. The non-blocking upper limit value and / or the blocking upper limit value are adjusted, in particular automatically, in particular depending on the maximum current value. This makes it possible to avoid overloading and / or disconnection of the battery. The battery can be constructed in particular for supplying the processing equipment, in particular an electric motor drive system, with electrical drive power. Additionally or alternatively, the non-blocking upper limit value and / or the blocking upper limit value can be equal to or less than the maximum current value.

[0025] In a refinement of the present invention, in particular a design, the operating element is user-adjustable. In step c), the setpoint speed, if any, depends on the position of the operating element, in particular the value of the position. Additionally or alternatively, step b) includes automatically reducing the torque generated by the electric motor drive system and automatically increasing the torque generated by the electric motor drive system over time, especially independently of the position of the operating element in the minimum starting position, if the operating element is adjusted to a minimum of 10%, in particular to a minimum of 20%, in particular to a minimum of 50%, in particular to 100% of the operating element's adjustment range or adjustment path, or when the operating element is adjusted to a minimum of 10%, in particular to a minimum of 20%, in particular to a minimum of 50%, in particular to 100% of the operating element's adjustment range or adjustment path. The operating element can in particular have at least three different positions. The operating element can in particular be user-adjustable in a stepless manner. Additionally or alternatively, the method and / or the processing device, in particular the electric motor drive system, can be configured to detect the position of an operating element using a potentiometer of the processing device. The operating element can in particular be configured to adjust the potentiometer. Furthermore, additionally or alternatively, the starting position can be used to initiate torque generation and / or be greater than zero or 0%.

[0026] In a development of the invention, step b) includes sending, in particular automatically sending, in particular displaying, a blockage signal that is perceptible to the user. This enables the user to perceive the blockage particularly well.

[0027] The manually guided machining device according to the present invention comprises a rotating and / or revolving cutting tool, in particular the rotating and / or revolving cutting tool, an electric motor drive system, in particular the electric motor drive system, a user-operable operating element, in particular the user-operable operating element and a monitoring and control device, in particular an electric monitoring and control device. The electric motor drive system is constructed or configured to generate a torque, in particular the torque to drive the cutting tool. The monitoring and control device is constructed or configured to automatically monitor whether a blocking criterion, in particular the blocking criterion, is met. The blocking criterion characterizes a blocking of the cutting tool, in particular a blocking of the cutting tool. In addition, the monitoring and control device is constructed or configured to automatically reduce the torque generated by the electric motor drive system if the blocking criterion is met and the operating element is operated and to automatically increase the torque generated by the electric motor drive system over time thereafter.

[0028] The processing device can achieve the same advantages as previously described for the method.

[0029] The processing plant, in particular the monitoring and control device, can be designed or configured to carry out the method described above. Additionally or alternatively, the processing plant can be designed or configured as described above with respect to the method. Furthermore, additionally or alternatively, the monitoring and control device can include a microcontroller, in particular a microcontroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Further advantages and aspects of the invention are apparent from the claims and from the following description of preferred exemplary embodiments of the invention, which are explained below with reference to the accompanying drawings.

[0031] Figure 1 Schematically illustrates a manually guided processing device according to the invention,

[0032] Figure 2 Show Figure 1 A processing device having a cutting tool for cutting a workpiece to be cut,

[0033] Figure 3 Show Figure 1 has been Figure 2 The workpiece blocks the cutting tool of the processing equipment,

[0034] Figure 4 Show cutting results about Figure 1 The feed force curve of the processing equipment,

[0035] Figure 5 The method for operating the present invention is shown Figure 1 Flowchart of a method for processing equipment, in particular Figure 1 A graph of the current versus time of an electric motor drive system of a processing device,

[0036] Figure 6 shows a further flow chart of the method according to the invention, in particular a further graph of the current of the electric motor drive system over time,

[0037] Figure 7 shows a further flow chart of the method according to the invention, in particular a diagram of the rotational speed of an electric motor drive system over time,

[0038] Figure 8 A further flow chart showing the method according to the invention, in particular Figure 1 A graph showing the operation of a control element of a processing device with respect to time,

[0039] Figure 9 A further flow chart showing a method according to the invention, in particular a diagram showing a torque generated by an electric motor drive system over time, and

[0040] Figure 10 A further flow chart of the method according to the invention is shown, in particular a further diagram of the torque generated by the electric motor drive system over time. DETAILED DESCRIPTION

[0041] Figures 1 to 3 The manually guided machining device 1 according to the invention is shown. The machining device 1 comprises a rotating and / or revolving cutting tool 2, an electric motor drive system 3, a user-operable operating element 4 and a monitoring and control device 5. The electric motor drive system 3 is designed for example Figure 9 and 10 As shown in FIG, a torque M is generated, the cutting tool 2 is driven, and in particular as in FIG. Figure 2 and 7 The monitoring and control device 5 is designed to automatically monitor whether the blocking criterion BK is met, in particular as shown in FIG. Figures 5 to 10 Monitor as shown in Figure 3 As shown in , the blocking criterion BK characterizes the blocking of the cutting tool 2. Furthermore, the monitoring and control device 5 is designed to automatically reduce the torque M generated by the electric motor drive system 3 if the blocking criterion BK is met and the operating element 4 is actuated, and to automatically increase the torque M generated by the electric motor drive system 3 over time, in particular to reduce and increase it.

[0042] Figures 1 to 3 as well as Figures 5 to 10The method according to the invention for operating a manually guided machining device 1 is shown. The method comprises the following steps: a) automatically monitoring, in particular by means of a monitoring and control device 5, whether a blocking criterion BK is satisfied. The blocking criterion BK characterizes a blocking of the cutting tool 2. b) if the blocking criterion BK is satisfied and the operating element 4 is actuated, the torque M generated by the electric motor drive system 3 is automatically reduced, in particular by means of the monitoring and control device 5, and subsequently automatically increased.

[0043] In detail, the electric motor drive 3 , in particular the rotor 3 ′ of the electric motor drive 3 , and the cutting tool 2 are coupled to one another in a clutchless manner, in particular in a rotationally fixed manner.

[0044] Furthermore, in the exemplary embodiment shown, the processing device 1 is a saw 1 ′, in particular a chain saw, and the cutting tool 2 has a saw chain 2 ′, in particular a saw chain 2 ′.

[0045] When operating the processing device 1, in the embodiment shown a saw 1', in particular the electric motor drive system 3, if the cutting tool 2 is Figure 2 If the saw chain 2 ′ is not blocked as shown in FIG, the cutting tool 2 , in the embodiment shown, the saw chain 2 ′, rotates and / or revolves, in particular in the direction RI.

[0046] When cutting the workpiece ST to be cut, in the embodiment shown, a tree trunk made of wood, the cutting tool 2, in the embodiment shown, the teeth of the cutting tool 2, are blocked by the workpiece ST, in particular as in Figure 3 As shown in , in the case of an excessively high feed force VF.

[0047] Figure 4 The graph of the cutting result SE is shown in relation to the feed force VF. Specifically, the range of the optimal feed force oVF and the range of an excessively high feed force hVF are shown. In the case of an excessively high feed force hVF, the cutting tool 2 is blocked or does not rotate and / or revolve.

[0048] This results in a reduction in the rotational speed frot of the electric motor drive system 3 and / or the cutting tool 2, in particular to zero, as in Figure 6 As shown in FIG. 1 at the time t of 24:46 min:s.

[0049] In addition, due to different loads, for example under different feed forces VF, that is, when the user presses the processing device 1 more or less strongly into the workpiece ST, fluctuations in the rotational speed frot occur, for example at time points t of 24:40 min:s to 24:46 min:s and 24:49 min:s to 25:04 min:s.

[0050] The blocking criterion BK is that despite the actuated operating element 4 and / or despite the generated torque M greater than zero and / or despite the current I greater than zero which causes the torque M, the speed frot of the electric motor drive system 3 and / or the cutting tool 2 is equal to or less than the blocking speed lower limit value frot', as in Figures 5 to 10 As shown in , in particular at the time t of 24:46 min:s.

[0051] The lower blocking speed limit value frot′ is in particular a minimum of zero, in particular a minimum of 1000 revolutions per minute (rpm), and / or a maximum of 3000 rpm, in particular a maximum of 2000 rpm, in the exemplary embodiment shown, 1500 rpm.

[0052] Furthermore, the method comprises the following step: c) if the blocking criterion BK is not met and the operating element 4 is actuated, the torque M generated by the electric motor drive system 3 is automatically controlled or automatically regulated, in particular by means of the monitoring and control device 5 , to achieve a target rotational speed frot″ of the electric motor drive system 3 and / or the cutting tool 2 .

[0053] In detail, the non-blocking speed lower limit value frot''' is greater than the blocking speed lower limit value frot'' for the set speed frot''.

[0054] The non-blocking speed lower limit value frot''' is in particular a minimum of 3500 rpm and / or a maximum of 5500 rpm, in the illustrated embodiment 4500 rpm. Therefore, in the illustrated embodiment, the non-blocking speed lower limit value frot''' is three times greater than the blocking speed lower limit value frot'.

[0055] Furthermore, the operating element 4 is user-adjustable.

[0056] In step c), the set rotational speed frot″ is dependent on the position of the operating element 4 .

[0057] In the exemplary embodiment shown, at a position of 100% of the operating element 4 , the set rotational speed frot″ is 10,000 rpm.

[0058] In addition, step b) includes: if the operating element is adjusted to the minimum starting position, in particular to a minimum of 50%, then the torque M generated by the electric motor drive system 3 is automatically reduced, in particular independently of the position of the operating element 4 of the minimum starting position, and the torque M generated by the electric motor drive system 3 is automatically increased over time thereafter.

[0059] Furthermore, in step c), the automatic increase of the generated torque M or the current I causing the torque M is limited to non-blocking upper limit values M', I', as in Figure 5 、 6 , 9 and 10. In step b), the torque M or the current I is reduced, in particular from the non-blocking upper limit value M', I'.

[0060] In the illustrated embodiment, the non-blocking upper limit I' is 87.5 amperes (A).

[0061] Additionally, in step b), the automatic increase in the generated torque M or current I is limited to an upper blocking limit value M″, I″.

[0062] In the illustrated embodiment, the upper blocking limit value I″ is 87.5 A.

[0063] Furthermore, in Figure 6 and 10 In a variant of the embodiment shown in , in step b) the automatic reduction of the generated torque M or current is limited to a lower blocking limit value M''', I''' which is greater than zero.

[0064] In the embodiment shown, the lower blocking limit value I''' is 12.5 A.

[0065] exist Figure 5 and 9 In a variant of the embodiment shown in , in step b) the generated torque M and / or the current I are reduced to zero.

[0066] Furthermore, step b) is automatically repeated, in particular until a repetition limit value WG is reached, which in the exemplary embodiment shown is a maximum of nine.

[0067] Furthermore, the upper blocking limit values M', I' depend on the number of repetitions of step b). The upper blocking limit values M', I' are reduced in particular depending on the number of repetitions of step b), for example after the fourth repetition, in particular by means of the monitoring and control device 5.

[0068] Furthermore, the method comprises the following steps: in particular, detecting a temperature T of the electric motor drive system 3 and / or a battery 50 electrically connected to the processing device 1 by means of a monitoring and control device 5. The repetition number limit value WG, the non-blocking upper limit values M', I' and / or the blocking upper limit values M'', I'' depend on the detected temperature T. The repetition number limit value WG, the non-blocking upper limit values M', I' and / or the blocking upper limit values M'', I'' are adjusted, in particular reduced, in particular, depending on the detected temperature T, in particular by means of the monitoring and control device 5.

[0069] Furthermore, the processing device 1 is configured to be electrically connected to different types of batteries 50. Different types of batteries 50 have different maximum current values Imax. The processing device 1 is electrically connected to one of the different types of batteries 50. The method comprises the following steps: in particular by means of a monitoring and control device 5, detecting the type of the electrically connected battery 50 and determining the maximum current value Imax based on the detected type and / or detecting the maximum current value Imax of the electrically connected battery 50. The non-blocking upper limit values M', I' and / or the blocking upper limit values M'', I'' depend on the maximum current value Imax. The non-blocking upper limit values M', I' and / or the blocking upper limit values M'', I'' are adjusted in particular depending on the maximum current value Imax, in particular by means of the monitoring and control device 5.

[0070] In the exemplary embodiment shown, the maximum current value Imax is 100 A.

[0071] Furthermore, the automatic reduction is carried out with a reduction duration t′ of at least 1 ms and / or at most 2 s, in the exemplary embodiment shown, 50 ms.

[0072] In addition, the automatic increase is carried out with an increase duration t''' of at least 1 ms and / or at most 2 s, in the exemplary embodiment shown, 50 ms.

[0073] Furthermore, the automatic increase is carried out after the automatic decrease after a pause duration t″ of at least 1 ms and / or at most 2 s, 250 ms in the exemplary embodiment shown.

[0074] Furthermore, in addition, during the repetition of step b), the automatic reduction is carried out after the automatic increase after a holding period t″″′ of at least 0 ms and / or at most 2 s, 0 ms in the exemplary embodiment shown.

[0075] Furthermore, step b) includes transmitting, in particular displaying, a user-perceptible blocking signal BS, in particular by means of a transmitting device 6 of the processing device 1 .

[0076] In the exemplary embodiment shown, the transmitter device 6 has an LED which flashes in step b).

[0077] In the exemplary embodiment shown, the blocking criterion BK is not met until the time t of 24:46 min:s and the operating element 4 is actuated. Therefore, step c) is carried out.

[0078] From the time t of 24:46 min:s onwards, the blocking criterion BK is met and the operating element 4 is actuated. Step b) is therefore carried out, in particular carried out several times.

[0079] This enables the user to perceive the blockage and thus to relieve the load on the cutting tool 2. This thus enables the cutting tool 2 to be unblocked.

[0080] From the time t of 24:49 min:s onwards, the blocking criterion BK is not satisfied, in particular is no longer satisfied, and the operating element 4 is actuated. Therefore, step c) is carried out.

[0081] In particular, during the entire time period, in particular from t = 24:46 min:s to 24:49 min:s, the operating element 4 is actuated, in particular at least adjusted into the starting position.

[0082] As is clearly evident from the exemplary embodiments shown and explained above, the present invention provides an advantageous method for operating a manually guided processing device and an advantageous manually guided processing device, which respectively have improved properties.

Claims

1. A method for operating a manually guided processing device (1), wherein: The processing equipment (1) has: - a rotating and / or orbiting cutting tool (2), - an electric motor drive system (3), wherein the electric motor drive system (3) is configured to generate a torque (M) to drive the cutting tool (2), and - a user-operable operating element (4), The method comprises the following steps: a) automatically monitoring whether a blocking criterion (BK) is fulfilled, wherein the blocking criterion (BK) characterizes blocking of the cutting tool (2), b) automatically reducing the torque (M) generated by the electric motor drive system (3) and automatically increasing the torque (M) generated by the electric motor drive system (3) afterward if the blocking criterion (BK) is met and the operating element (4) is actuated, and c) automatically controlling or automatically regulating the torque (M) generated by the electric motor drive system (3) to achieve a theoretical rotational speed (frot") of the electric motor drive system (3) and / or the cutting tool (2) if the blocking criterion (BK) is not met and the operating element (4) is operated, wherein the operating element (4) is user-adjustable, wherein, in step c), the theoretical rotational speed (frot") depends on the position of the operating element (4).

2. The method according to claim 1, - wherein the processing device (1) is a saw (1'), a brush cutter, a lawn mower, a rock drill or a cutter, and / or -in, The cutting tool (2) comprises a saw chain (2'), a saw blade, a cutting blade, a cutting tool, a grinding chain or a grinding disk.

3. The method according to claim 2, - wherein the processing equipment (1) is a chain saw, and / or -in, The cutting tool (2) is a saw chain (2'), a saw blade, a cutting disc, a cutting tool, a grinding chain or a grinding disc.

4. The method according to any one of claims 1 to 3, -in, The electric motor drive system (3) and the cutting tool (2) are coupled to each other without a clutch.

5. The method according to claim 4, -in, The electric motor drive system (3) and the cutting tool (2) are coupled to each other in a rotationally fixed manner.

6. The method according to claim 4, -in, The rotor (3') of the electric motor drive system (3) and the cutting tool (2) are coupled to each other without a clutch.

7. The method according to claim 4, -in, The rotor (3') of the electric motor drive system (3) and the cutting tool (2) are coupled to each other in a rotationally fixed manner.

8. The method according to any one of claims 1 to 3, -in, The blocking criterion (BK) is that, despite an operated operating element (4) and / or despite a generated torque (M) greater than zero and / or despite a current (I) greater than zero which causes the torque (M), the rotational speed (frot) of the electric motor drive system (3) and / or the cutting tool (2) is equal to or less than a lower blocking speed limit value (frot').

9. The method according to any one of claims 1 to 3, -in, Step b) is automatically repeated.

10. The method according to claim 9, -in, Step b) is automatically repeated until a repetition limit value (WG) is reached.

11. The method according to any one of claims 1 to 3, wherein the automatic reduction is carried out with a reduction duration (t') of at least 1 ms and / or at most 2 s, and / or -in, The automatic increase is carried out with an increase duration (t'') of at least 1 ms and / or at most 2 s, and / or -in, The automatic increase is carried out after a pause duration (t") of at least 1 ms and / or at most 2 s and after the automatic decrease, and / or wherein step b) is automatically repeated, wherein, during the repetition of step b), the automatic reduction is carried out temporally after the automatic increase after a holding period (t″”) of at least 0 ms and / or at most 2 s.

12. The method according to claim 11, - wherein the automatic lowering is carried out with a lowering duration (t') of 50 ms, and / or -in, The automatic increase is performed with an increase duration (t'') of 50 ms, and / or -in, The automatic increase is carried out after a pause duration (t″) of 250 ms and after the automatic decrease.

13. The method according to claim 8, wherein the non-blocking speed lower limit value (frot'") is greater than the blocking speed lower limit value (frot') for the setpoint speed (frot").

14. The method according to claim 13, wherein the non-blocking speed lower limit value (frot'") is at least twice as large as the blocking speed lower limit value (frot') for the setpoint speed (frot").

15. The method according to claim 1, wherein, in step c), the automatic increase of the generated torque (M) or of the current (I) causing said torque (M) is limited to a non-blocking upper limit value (M', I'), and / or - Among them, In step b), the automatic increase of the generated torque (M) or the current (I) is limited to an upper blocking limit value (M", I"), and / or wherein, in step b), the automatic reduction of the generated torque (M) or the current (I) is limited to a lower blocking limit value (M'', I'') greater than zero.

16. The method according to claim 15, -in, In step b), the torque (M) or the current is reduced from the non-blocking upper limit (M', I'), and / or - wherein the lower blocking limit value (M'", I'") is at least 0.1 times and / or at most 0.25 times the upper blocking limit value (M", I").

17. The method according to claim 15, -in, Step b) is automatically repeated, wherein the upper blocking limit values (M", I") depend on the number of repetitions of step b).

18. The method according to claim 17, - wherein said upper blocking limit values (M", I") are reduced depending on the number of repetitions of said step b).

19. The method according to claim 15, wherein Step b) is automatically repeated until a repetition limit value (WG) is reached, wherein the method comprises the following steps: - detecting the temperature (T) of the electric motor drive system (3) and / or of a battery (50) electrically connected to the processing device (1), and - wherein the repetition number limit value (WG), the non-blocking upper limit value (M', I') and / or the blocking upper limit value (M", I") depend on the detected temperature (T).

20. The method according to claim 19, -in, The repetition number limit value (WG), the non-blocking upper limit value (M′, I′) and / or the blocking upper limit value (M″, I″) are adjusted depending on the detected temperature (T).

21. The method according to claim 15, -in, The processing device (1) is configured to be electrically connected to different types of batteries (50), wherein the different types of batteries (50) have different maximum current values (Imax), wherein the processing device (1) is electrically connected to one type of battery (50) of the different types of batteries (50), The method comprises the following steps: - detecting the type of the electrically connected battery (50) and determining the maximum current value (Imax) based on the detected type and / or detecting the maximum current value (Imax) of the electrically connected battery (50), and - wherein the non-blocking upper limit value (M', I') and / or the blocking upper limit value (M", I") depends on the maximum current value (I', Imax).

22. The method according to claim 21, -in, The non-blocking upper limit value (M', I') and / or the blocking upper limit value (M", I") are adjusted depending on the maximum current value (I', Imax).

23. The method according to claim 1, - wherein step b) comprises: if the operating element (4) is adjusted to the minimum starting position, the torque (M) generated by the electric motor drive system (3) is automatically reduced and the torque (M) generated by the electric motor drive system (3) is automatically increased over time thereafter.

24. The method according to claim 23, - wherein step b) comprises: if the operating element (4) is adjusted to the minimum starting position, the torque (M) generated by the electric motor drive system (3) is automatically reduced independently of the position of the operating element (4) at the minimum starting position and the torque (M) generated by the electric motor drive system (3) is automatically increased over time thereafter.

25. The method according to claim 23, - wherein step b) comprises: if the operating element (4) is adjusted by at least 10% of the adjustment range of the operating element (4), the torque (M) generated by the electric motor drive system (3) is automatically reduced and the torque (M) generated by the electric motor drive system (3) is automatically increased in time thereafter.

26. The method according to claim 23, -in, Step b) comprises: if the operating element (4) is adjusted by at least 10% of the adjustment range of the operating element (4), the torque (M) generated by the electric motor drive system (3) is automatically reduced independently of the position of the operating element (4) of the minimum starting position and the torque (M) generated by the electric motor drive system (3) is automatically increased in time thereafter.

27. The method according to any one of claims 1 to 3, - wherein said step b) comprises: sending a blocking signal (BS) perceptible to a user.

28. The method according to claim 27, - wherein said step b) comprises: displaying a blocking signal (BS) perceptible to a user.

29. A manually guided processing apparatus (1), wherein: The processing equipment (1) has: - a rotating and / or orbiting cutting tool (2), - an electric motor drive system (3), wherein the electric motor drive system (3) is configured to generate a torque (M) for driving the cutting tool (2), - a user-operable control element (4), and - a monitoring and control device (5), wherein the monitoring and control device (5) is configured for - automatically monitoring whether a blocking criterion (BK) is fulfilled, wherein the blocking criterion (BK) characterizes blocking of the cutting tool (2), - if the blocking criterion (BK) is met and the operating element (4) is actuated, the torque (M) generated by the electric motor drive system (3) is automatically reduced and, after this, the torque (M) generated by the electric motor drive system (3) is automatically increased, and - If the blocking criterion (BK) is not met and the operating element (4) is operated, the torque (M) generated by the electric motor drive system (3) is automatically controlled or automatically adjusted to achieve a theoretical rotational speed (frot") of the electric motor drive system (3) and / or the cutting tool (2), wherein the operating element (4) is user-adjustable, wherein the theoretical rotational speed (frot") depends on the position of the operating element (4).

30. Manually guided processing device (1) according to claim 29, - wherein the processing device (1) is used to implement the method according to any one of claims 1 to 28.

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