Hand-held power tool and method for operating a hand-held power tool

Abstract

The handheld power tool (1) according to the present invention comprises a housing (8), which has a first housing element (9) and a second housing element (10), wherein the first housing element (9) and the second housing element (10) are separated from each other and can move relative to each other. The handheld power tool (1) also comprises a tool holder (2) and a motor (4) for driving the tool holder (2) rotationally and / or impactfully. In addition, the handheld power tool (1) has a magnetic field sensor (16), which is used to detect the distance (L) between the first housing element (9) and the second housing element (10). In addition, the handheld power tool (1) comprises a control device (18), which is used to set the motor speed of the motor (4) according to the detected distance (L).

Description

Technical Field

[0001] The invention relates to a handheld power tool and a method for operating a handheld power tool. Background Art

[0002] In the case of handheld power tools, it is often a problem to apply and engage the tool of the handheld power tool (such as a drill) to / on a workpiece. This is particularly true for handheld power tools with high single impact energy and / or low dead weight. EP 1 466 702 A1 discloses a handheld power tool having a force sensor for measuring the pressure of the handheld power tool on the workpiece. EP 1 958 735 A1 discloses a handheld power tool having a base housing and an outer housing, which is fixed to the base housing via a separation device and is firmly connected to a main handle and a side handle connection device. EP 1 882 559 A1 discloses a handheld power tool having a housing and a handle, which is fixed to the housing via a separation arrangement. Summary of the invention

[0003] Against this background, it is an object of the present invention to provide an improved hand-held power tool and an improved method for operating a hand-held power tool.

[0004] According to a first aspect, a handheld power tool is proposed. The handheld power tool comprises a housing having a first housing element and a second housing element. The first housing element and the second housing element are separated from each other and can move relative to each other. The handheld power tool also comprises a tool holder and a motor for driving the tool holder rotationally and / or impactfully. In addition, the handheld power tool comprises a magnetic field sensor for detecting the spacing between the first housing element and the second housing element. In addition, the handheld power tool comprises a control device for setting the motor speed of the motor according to the detected spacing.

[0005] The handheld power tool is, for example, a hammer drill, a chisel hammer, a combination hammer, a core drill or a screwdriver. The tool holder of the handheld power tool is used to insert a rotatable tool, such as a drill bit or a chiseling tool. The motor of the handheld power tool is specifically an electric motor. The motor of the handheld power tool is especially a motor with an adjustable speed. The motor of the handheld power tool is specifically used to drive the tool holder to set the tool to a rotational motion and / or a striking motion by rotationally and / or impactingly driving the tool holder. For example, the motor of the handheld power tool is used to drive the tool holder to rotate around the working axis by rotationally driving the tool holder around the working axis. By rotating the tool, a workpiece (such as a base material and / or a wall) can be drilled. For example, the motor of the handheld power tool is also used to drive the tool holder to set the tool to a striking motion in the striking direction by impacting in the striking direction. The striking direction is specifically parallel to the working axis. Objects can be chiseled by the striking motion of the tool.

[0006] Due to the work on the workpiece with the handheld power tool's rotation and / or impact tool, a reaction force can act on the handle of the handheld power tool. For example, a reaction torque can act on the handle due to the rotation work on the workpiece. Specifically, the vibration movement can be transmitted to the handle by the rotation and / or impact work on the workpiece.

[0007] In order to suppress or avoid vibration movement of the handle, the housing of the handheld power tool has two housing elements, namely a first housing element and a second housing element that are mechanically separated from each other. Specifically, the tool holder is arranged on the first housing element, and the second housing element has the handle of the handheld power tool. Due to the mechanical separation of the first housing element and the second housing element, the reaction forces from the tool and the tool holder are not transmitted to the handle or are transmitted only to a limited extent.

[0008] In particular, the first housing element and the second housing element are movably fixed to each other and are mechanically separated from each other by means of a separating device. In particular, the separating device keeps the first housing element and the second housing element separated. In particular, the separating device is compressible, as a result of which the spacing between the first housing element and the second housing element can be changed by compressing the separating device. In particular, the spacing between the first housing element and the second housing element can be changed by the separating device. The separating device has, for example, one or more spring elements, bearings and / or elastic bearings.

[0009] In order to work on a workpiece, a user holding the handheld power tool by the handle exerts a force on the handle in the direction of the workpiece. The spacing between the first housing element, on which the tool holder with the tool is arranged, and the second housing element, which includes the handle, is reduced by the pressure of the user. In particular, the pressure compresses the separation device. The harder the user presses the handle, the smaller the spacing between the first housing element and the second housing element becomes.

[0010] In order to detect the variable spacing between the first housing element and the second housing element, the handheld power tool has a magnetic field sensor. The magnetic field sensor is, for example, a Hall sensor, a magnetoresistive sensor or a field plate sensor. The magnetic field sensor is preferably a one-dimensional magnetic field sensor, such as a linear Hall sensor, or a multi-dimensional magnetic field sensor, such as a 3D magnetic field sensor and / or a 3D Hall sensor. However, other magnetic field sensors may also be used in the handheld power tool.

[0011] The magnetic field sensor is arranged on the first housing element and measures the distance to the second housing element, or the magnetic field sensor is arranged on the second housing element and measures the distance to the first housing element.

[0012] By virtue of the handheld power tool having a magnetic field sensor for detecting the distance between the first housing element and the second housing element, the pressure exerted by the user on the handheld power tool via the handle can be determined.

[0013] The control device of the handheld power tool for setting the motor speed of the motor according to the detected spacing is specifically used to increase the motor speed when the detected spacing decreases. For example, the control device is designed to increase the motor speed in a ramp-like manner when the detected spacing decreases. For example, the control device is designed to increase the motor speed inversely proportional to the detected spacing. For example, the control device is designed to increase the motor speed linearly according to the inverse of the detected spacing.

[0014] By setting the motor speed according to the detected spacing, the rotation mode of the tool holder can also be set according to the detected spacing. For example, the rotation rate and / or torque of the tool holder can be set according to the detected spacing, and / or the rotational motion of the tool holder can be started according to the detected spacing. By setting the motor speed according to the detected spacing, the impact mode of the tool holder can also be set according to the detected spacing. For example, the impact frequency, impact amplitude and / or impact force of the tool holder can be set according to the detected spacing, and / or the striking motion of the tool holder can be started according to the detected spacing. Specifically, setting the motor speed according to the detected spacing can include starting the impact drive of the tool holder according to the detected spacing.

[0015] Since the detected spacing between the first housing element and the second housing element is a measure of the pressure of the user, the control device can set the handheld power tool according to the pressure applied by the user. Specifically, the control device is designed to increase the motor speed if the determined pressure increases. Therefore, the user can intuitively control the power output of the handheld power tool via pressure.

[0016] Setting the handheld power tool depending on the pressure makes it possible, for example, for the handheld power tool to be applied to the workpiece more easily and to start the process of working on the workpiece more easily and in an improved manner. Specifically, this is also possible for a handheld power tool with a low deadweight.

[0017] For example, the tool can be applied to the workpiece at a low motor speed, and the motor speed can then be increased in a ramp-like manner to a maximum speed. Thus, for example, a hammer drill can be applied to the workpiece without an impact movement, and the impact movement can be started only by pressure on the workpiece.

[0018] According to one embodiment, the control device is designed to determine the pressure as a function of the detected spacing and to set the motor speed of the motor as a function of the determined pressure.

[0019] For example, the control device calculates the pressure from the detected distance using an algorithm in the control device.

[0020] The control device is specifically designed to increase the motor speed in dependence on the determined pressure. For example, the control device is designed to increase the motor speed in a ramp-like manner if the determined pressure increases. For example, the control device is designed to increase the motor speed in proportion to the determined pressure. For example, the control device is designed to increase the motor speed linearly in dependence on the determined pressure.

[0021] By setting the motor speed according to the determined pressure, the rotation mode of the tool holder can also be set according to the determined pressure. For example, the rotation rate and / or torque of the tool holder can be set according to the determined pressure, and / or the rotational movement of the tool holder can be started according to the determined pressure. By setting the motor speed according to the determined pressure, the impact mode of the tool holder can also be set according to the determined pressure. For example, the impact frequency, impact amplitude and / or impact force of the tool holder can be set according to the determined pressure, and / or the striking movement of the tool holder can be started according to the determined pressure. Specifically, setting the motor speed according to the determined pressure, that is to say according to the detected spacing, can include starting the impact drive of the tool holder according to the determined pressure.

[0022] Thus, for example, annoying striking movements of the tool in idle mode can be avoided. Idle mode is a mode in which the motor rotates but does not perform work on the workpiece. Gentle operation of the handheld power tool can also be achieved, which the user can intuitively control by pressure at each new application of the handheld power tool.

[0023] According to another embodiment, the control device is designed to increase the motor speed of the motor as a function of the determined pressure if the determined pressure is greater than a first specific threshold value.

[0024] The first specific threshold value corresponds to a specific pressure. Specifically, the first specific threshold value corresponds to a specific pressure applied by the indicator tool on the workpiece. Specifically, the control device compares the determined pressure with the first specific threshold value. If the control device determines that the determined pressure is greater than the first specific threshold value, for example, when the pressure rises and is proportional to the determined pressure, the control device continuously increases the motor speed.

[0025] By the control device being designed to increase the motor speed of the motor according to the determined pressure if the determined pressure is greater than a first specific threshold, it can be determined that the tool has been reliably applied to the workpiece since a minimum pressure corresponding to the first specific threshold applied to the workpiece is being applied to the workpiece. In addition, it can be ensured that the handheld power tool reacts dynamically to the pressure of the user. In particular, this enables the tool applied to the workpiece to maintain reliable contact with the workpiece during further work. In particular, it can be avoided that the tool slips off the workpiece due to drilling mode and / or impact mode.

[0026] According to another embodiment, the control device is designed to set the motor speed of the motor to a maximum motor speed if the determined pressure is greater than a second specific threshold value. The second specific threshold value is greater than the first specific threshold value.

[0027] The second specific threshold corresponds to a specific pressure that specifically indicates that the tool is reliably engaged with the workpiece. Specifically, the control device compares the determined pressure with the second specific threshold. If the control device determines that the determined pressure is greater than the second specific threshold, the control device sets the motor speed to the maximum motor speed. The maximum motor speed is, for example, the maximum motor speed for which the motor of the handheld power tool is designed.

[0028] By designing the control device to set the motor speed of the motor to the maximum motor speed if the determined pressure is greater than a second specific threshold value, the maximum power of the handheld power tool can be obtained as soon as it is detected that the tool is reliably engaged on the workpiece. At a corresponding pressure, the maximum power can be obtained, for example, 250 milliseconds after the start of application to the workpiece.

[0029] According to another embodiment, the magnet is arranged on the first housing element and the magnetic field sensor is arranged on the second housing element. Furthermore, the magnetic field sensor is designed to detect the distance between the magnetic field sensor and the magnet, ie the distance between the first housing element and the second housing element.

[0030] The magnet is, for example, a permanent magnet or comprises a coil. Specifically, a magnetic field sensor arranged on the second housing element comprising the handle measures the magnetic field of the magnet arranged on the first housing element. The magnetic field detected at the location of the magnetic field sensor depends on the distance from the magnet, and thus the magnetic field sensor can detect the distance between the magnetic field sensor and the magnet.

[0031] By arranging the magnetic field sensor on the second housing element, which is preferably decoupled from vibration movements of the first housing element, the magnetic field sensor can be protected against vibrations.

[0032] By arranging the magnet on the first housing element, arranging the magnetic field sensor on the second housing element, and the magnetic field sensor detecting the distance between the magnetic field sensor and the magnet, the distance between the first housing element and the second housing element can be accurately detected. Therefore, the pressure can be determined very accurately.

[0033] According to another embodiment, the magnetic field sensor is a 3D magnetic field sensor.

[0034] A 3D magnetic field sensor is a magnetic field sensor that can detect a magnetic field in three spatial directions. Specifically, a 3D magnetic field sensor measures the three-dimensional vector of the magnetic flux density of a magnetic field. A 3D magnetic field sensor is, for example, a 3D Hall sensor, in which one or more Hall effect elements are arranged in each spatial direction on the chip.

[0035] By virtue of the magnetic field sensor being a 3D magnetic field sensor, for example, the magnetic field of a magnet arranged on the first housing element can be determined very accurately. In particular, by virtue of the magnetic field sensor being a 3D magnetic field sensor, the spacing between the first housing element and the second housing element can be determined very accurately. As a result, a precisely calibrated reaction of the power output of the motor to the spacing and thus to the pressure is possible.

[0036] According to another embodiment, the tool holder is arranged on the first housing element and the second housing element has a handle of the handheld power tool.

[0037] Therefore, the tool holder can be separated from the handle by separating the first housing element from the second housing element.Therefore, vibration of the handle caused by the reaction force of the tool and the tool holder can be damped or avoided.

[0038] Specifically, in this embodiment, the motor, the striking mechanism and the drive shaft are also arranged in the first housing element.

[0039] According to another embodiment, the first housing element is at least partially arranged within the second housing element.

[0040] In particular, in this embodiment, the tool holder is arranged on the inner first housing element and the outer second housing element has a handle for the handheld power tool.

[0041] Therefore, decoupling the handle from the tool holder in order to reduce vibrations may be achieved by a sub-chassis solution.

[0042] In embodiments, the first housing element may also be arranged adjacent to the second housing element instead of being arranged at least partially in the second housing element.

[0043] According to another embodiment, the control device is designed to set the motor speed of the motor according to the detected pitch by open-loop controlling the motor speed according to the detected pitch or by closed-loop controlling the motor speed according to the detected pitch.

[0044] According to a second aspect, a method for operating a handheld power tool is proposed. The handheld power tool has a motor for rotating and / or impact-driving a tool holder and has a magnetic field sensor. In addition, the handheld power tool has a housing having a first housing element and a second housing element. The first housing element and the second housing element are separated from each other and can move relative to each other. The method has a step of detecting the spacing between the first housing element and the second housing element by means of a magnetic field sensor. In addition, the method has a step of setting the motor speed of the motor according to the detected spacing.

[0045] The properties and advantages which have been described for the hand-held power tool apply correspondingly to the proposed method for operating a hand-held power tool.

[0046] According to an embodiment of the second aspect, the method has the step of determining the pressure based on the detected distance.

[0047] Determining the pressure based on the detected distance is accomplished, for example, by the control device described in conjunction with the handheld power tool.

[0048] The step of determining the pressure according to the detected distance is performed after the step of detecting the distance between the first housing element and the second housing element and before the step of setting the motor speed of the motor according to the detected distance. The method steps are repeated in the sequence during operation of the handheld power tool.

[0049] The step of setting the motor speed of the motor according to the detected spacing specifically comprises setting the motor speed of the motor according to the determined pressure.

[0050] According to another embodiment of the second aspect, setting the motor speed of the motor according to the detected spacing includes: open-loop controlling the motor speed according to the detected spacing or closed-loop controlling the motor speed according to the detected spacing.

[0051] According to another embodiment of the second aspect, setting the motor speed of the motor comprises increasing the motor speed according to the determined pressure if the determined pressure is greater than a first specific threshold.

[0052] According to another embodiment of the second aspect, setting the motor speed of the motor comprises: if the determined pressure is greater than a second specific threshold, setting the motor speed to a maximum motor speed. The second specific threshold is greater than the first specific threshold.

[0053] The control device has, for example, a processor and a computer program that can be executed by means of the processor. The control device (for example, a computer program) specifically includes one or more algorithms that are designed to determine the pressure based on the detected distance, compare the determined pressure with a first specific threshold value and a second specific threshold value, and / or set the motor speed.

[0054] The corresponding unit (e.g. a processor) can be implemented in the form of hardware and / or also in the form of software. In a hardware implementation, the unit can be formed as a device or a part of a device, for example as a computer or a microprocessor. In a software implementation, the unit can be formed as a computer program product, a function, a routine, a part of a program code or an executable object.

[0055] The computer program product, e.g. computer program means, may be provided or supplied, e.g. as a storage medium, e.g. a memory card, a USB stick, a CD-ROM, a DVD or in the form of a file that can be downloaded from a server in the network. This may be done, for example, by transmitting a corresponding file using the computer program product or the computer program means in a wireless communication network.

[0056] The embodiments and features described for the method are correspondingly applicable to the handheld power tool and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The following description illustrates the present invention with reference to exemplary embodiments and the accompanying drawings. In the drawings:

[0058] Figure 1 a schematic diagram showing a hand-held power tool; and

[0059] Figure 2 shows the operation according to Figure 1 A schematic diagram of a method of a handheld power tool. DETAILED DESCRIPTION

[0060] References below Figure 1 and Figure 2 Embodiments of a handheld power tool 1 and a method for operating the handheld power tool 1 are described.

[0061] Figure 1A hammer drill is shown as an exemplary embodiment of a handheld power tool 1. The hammer drill 1 has a tool holder 2, into which the shaft end of a tool 3, such as a drill bit or a chiseling tool, can be inserted. A motor 4 driving a striking mechanism 5 and a drive shaft 6 forms the main drive of the hammer drill 1. A rechargeable battery 7 or a power cord (not shown) supplies power to the motor 4.

[0062] The hammer drill 1 has a housing 8, which comprises a first housing element 9 and a second housing element 10. The second housing element 10 has a handle 11, by which the user can hold and guide the hammer drill 1. The user can put the hammer drill 1 into operation via a main button 12. Due to the actuation of the main button 12, the motor 4 rotates at an adjustable motor speed, the motor 4 drives the drive shaft 6, and the drive shaft 6 causes the tool holder 2 to perform a rotational movement about the working axis 13. As a result, the tool 3 rotates about the working axis 13. During operation, in addition to the rotation about the working axis 13, the hammer drill 1 can also strike the tool 3 into the base material along the working axis 13 in a striking direction 14. Since the striking mechanism 5 drives the tool holder 2, in addition to the rotational movement about the working axis 13, the tool 3 also performs a striking movement in the striking direction 14. In an exemplary embodiment, the hammer drill 1 has a mode selection switch (not shown), by which the tool holder 2 can be separated from the drive shaft 6, so that a pure chiseling mode of the hammer drill 1 is possible.

[0063] The first housing element 9 and the second housing element 10 of the hammer drill 1 are mechanically separated from each other by a separation device 15. The tool holder 2, the motor 4, the striking mechanism 5, the drive shaft 6 and the rechargeable battery 7 are arranged on the first housing element 9. The second housing element 10 comprises a handle 11. In the case of a drilling mode and / or an impact mode of the hammer drill 1, the reaction forces of the tool 3 and the tool holder 2 may cause vibrations of the first housing element 9. By separating the first housing element 9 from the second housing element 10 by means of the separation device 15, such vibrations of the first housing element 9 are not transmitted or are transmitted only in an attenuated form to the handle 11. Figure 1 In the embodiment shown, separation is achieved by arranging the first housing element 9 in the second housing element 10. In another embodiment (not shown), separation of the first housing element 9 from the second housing element 10 can alternatively be achieved by arranging the second housing element 10 having the handle 11 adjacent to the first housing element 9.

[0064] There is a variable distance L between the first housing element 9 and the second housing element 10 . In the rest state, ie when the user is not pressing the drill hammer 1 against a workpiece, the distance L is predetermined by the separating device 15 .

[0065] A user who wants to work on a workpiece with the hammer drill 1 holds the hammer drill 1 by means of the separate handle 11 and puts the hammer drill 1 into operation by actuating the main button 10. By actuating the main button 10, the motor 4 is first set to a rotational movement at a low motor speed. In addition, the tool 3 is set to a rotational movement about the working axis 13. The user applies the tool 3 of the hammer drill 1 to the workpiece. In order to work on the workpiece and start the impact mode, the user applies a pressure F on the handle 11. This pressure F is substantially in line with the direction of the workpiece, i.e. along the working axis 13.

[0066] The distance L between the first housing element 9 and the second housing element 10 is reduced by the user's pressure F. Specifically, the pressure F compresses the separation device 15. The harder the user presses the handle 11, the smaller the distance L between the first housing element 9 and the second housing element 10 becomes.

[0067] Figure 2 Shows the operation Figure 1 Schematic diagram of the method of hammer drilling 1.

[0068] In a first step S1 of the method, a distance L between first housing element 9 and second housing element 10 is detected by means of magnetic field sensor 16 .

[0069] In order to detect the distance L between the first housing element 9 and the second housing element 10, the hammer drill 1 has a magnet 17 in addition to the magnetic field sensor 16. The magnetic field sensor 16 is arranged on the second housing element 10. The magnet 17 is arranged on the first housing element 9. The magnetic field sensor 16 detects the magnetic field of the magnet 17, specifically the magnetic flux density of the magnet 17. The greater the pressure F when the user presses the handle 11, the smaller the distance L between the first housing element 9 and the second housing element 10, specifically the smaller the distance between the magnetic field sensor 16 and the magnet 17. The smaller the distance L between the magnetic field sensor 16 and the magnet 17, the larger the magnetic field detected by the magnetic field sensor 16. Therefore, the magnetic field sensor 16 can detect the distance L by detecting the magnetic field of the magnet 17. The magnetic field sensor 16 controls the transmission of the distance L as a signal to the control device 18 of the hammer drill 1.

[0070] In a second step S2 of the method, the pressure F is determined according to the detected distance L. Specifically, the control device 18 determines the pressure F from the detected distance L by calculation with the aid of an algorithm in the control device 18 .

[0071] In a third step S3 of the method, the motor speed of the motor 4 is set as a function of the detected distance L, in particular as a function of the determined pressure F.

[0072] Specifically, the control device 18 is designed to increase the motor speed of the motor 4 according to the determined pressure F if the determined pressure F is greater than a first specific threshold value. For this purpose, the control device 18 compares the determined pressure F with the first specific threshold value in a second step S2 of the method. The first specific threshold value is a specific pressure indicating that the tool 3 is reliably applied to the workpiece.

[0073] If the control device 18 determines that the determined pressure F is greater than the first specific threshold value and therefore the tool 3 has been reliably applied to the workpiece, the control device 18 sends a signal to the motor 4 to increase the motor speed. Specifically, the control device 18 continuously sends a signal to the motor 4 to increase the motor speed of the motor 4 and is proportional to the determined pressure F when the pressure rises. Due to the increase in the motor speed, the impact mode of the tool holder 2 is started. By further increasing the motor speed, the impact frequency, the impact amplitude and / or the impact force are continuously increased. By the motor speed being increased first and the impact mode being started only when the first specific threshold value is exceeded, the tool can be more easily applied to the workpiece.

[0074] Furthermore, the control device 18 is designed to set the motor speed of the motor 4 to the maximum motor speed if the determined pressure F is greater than a second specific threshold value, wherein the second specific threshold value is greater than the first specific threshold value. For this purpose, the control device 18 compares the determined pressure F with the second specific threshold value. The second specific threshold value corresponds to a specific pressure, which specifically indicates that the tool 3 is reliably engaged on the workpiece.

[0075] If the control device 18 determines that the determined pressure F is greater than a second specific threshold value, that is to say that once the tool is securely engaged on the workpiece, the control device 18 sets the motor speed to the maximum motor speed for which the motor 4 is designed. The maximum power of the hammer drill 1 is thus obtained.

[0076] With the described hammer drill 1 and the described method for operating the hammer drill 1 , a user can work safely and intuitively on a workpiece with the tool 3 of the hammer drill 1 by means of a pressure-controlled gentle operation of the hammer drill 1 and a subsequent pressure-controlled maximum power output of the hammer drill 1 .

[0077] List of Reference Numerals

[0078] 1Handheld power tool (hammer drill)

[0079] 2 Tool holder

[0080] 3 Tools

[0081] 4 Motors

[0082] 5 striking mechanism

[0083] 6 Drive shaft

[0084] 7 Rechargeable batteries

[0085] 8 Shell

[0086] 9 First housing element

[0087] 10 Second housing element

[0088] 11 Handle

[0089] 12 Main buttons

[0090] 13 Working axis

[0091] 14 Impact direction

[0092] 15 Separation device

[0093] 16 Magnetic Field Sensors

[0094] 17 Magnets

[0095] 18 Control Devices

[0096] S1 Method Steps

[0097] S2 Method Steps

[0098] S3 Method Steps

Claims

1. A handheld power tool (1), comprising: A housing (8) comprising a first housing element (9) and a second housing element (10), wherein: The first housing element (9) and the second housing element (10) are separate from each other and are movable relative to each other, Tool holder (2), a motor (4) for driving the tool holder (2) rotationally and / or impactfully, A magnetic field sensor (16) for detecting a distance (L) between the first housing element (9) and the second housing element (10), wherein a magnet (17) is arranged on the first housing element (9), and the magnetic field sensor (16) is arranged on the second housing element (10), and the magnetic field sensor (16) is designed to detect a variable distance between the magnetic field sensor (16) and the magnet (17) when the distance (L) between the first housing element (9) and the second housing element (10) changes; A control device (18) is used to set the motor speed of the motor (4) according to the detected distance (L), and the control device (18) is designed to determine the pressure (F) from the detected distance (L) and set the motor speed of the motor (4) according to the determined pressure (F), and the motor speed increases linearly with the increase of the determined pressure and / or the motor speed increases continuously and in proportion to the determined pressure.

2. The handheld power tool (1) according to claim 1, characterized in that: The control device (18) is designed to increase the motor speed of the motor (4) according to the determined pressure (F) if the determined pressure (F) is greater than a first specific threshold value.

3. The handheld power tool (1) according to claim 2, characterized in that: The control device (18) is designed to set the motor speed of the motor (4) to a maximum motor speed if the determined pressure (F) is greater than a second specific threshold value, wherein the second specific threshold value is greater than the first specific threshold value.

4. The handheld power tool (1) according to any one of claims 1 to 3, characterized in that: The magnetic field sensor (16) is a 3D magnetic field sensor.

5. The handheld power tool (1) according to any one of claims 1 to 3, characterized in that: The tool holder (2) is arranged on the first housing element (9), and the second housing element (10) has a handle (11) of the handheld power tool (1).

6. The handheld power tool (1) according to any one of claims 1 to 3, characterized in that: The first housing element (9) is at least partially arranged within the second housing element (10).

7. The handheld power tool (1) according to any one of claims 1 to 3, characterized in that: The control device (18) is designed to set the motor speed of the motor (4) according to the detected distance (L) by open-loop controlling the motor speed according to the detected distance (L) or by closed-loop controlling the motor speed according to the detected distance (L).

8. A method for operating a hand-held power tool (1) according to one of claims 1 to 7, comprising: a motor (4) for driving a tool holder (2) rotationally and / or impactfully, a magnetic field sensor (16) and a housing (8) having a first housing element (9) and a second housing element (10), wherein: The first housing element (9) and the second housing element (10) are separated from each other and are movable relative to each other, and the method comprises the following steps: The magnetic field sensor (16) detects a distance (L) between the first housing element (9) and the second housing element (10); and The motor speed of the motor (4) is set according to the detected distance (L).

9. The method according to claim 8, characterized by the steps of: The pressure (F) is determined from the detected distance (L).

10. The method according to claim 8 or 9, characterized in that Setting the motor speed of the motor (4) according to the detected spacing (L) comprises: open-loop controlling the motor speed according to the detected spacing (L) or closed-loop controlling the motor speed according to the detected spacing (L).

11. The method according to claim 9, characterized in that Setting the motor speed of the motor (4) comprises: if the determined pressure (F) is greater than a first specific threshold, increasing the motor speed according to the determined pressure (F).

12. The method according to claim 11, characterized in that Setting the motor speed of the motor (4) comprises: if the determined pressure (F) is greater than a second specific threshold, wherein the second specific threshold is greater than the first specific threshold, setting the motor speed to a maximum motor speed.

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