Machine tool device, machine tool and machine tool system

Abstract

The invention relates to a machine tool device (10), comprising a housing unit (12), which has at least one handle section (14) and at least one drive section (16); a drive unit (18) for driving the tool (20); a tool receptacle (22) for connecting the tool (20) to the drive unit (18); a battery unit (24) for supplying energy to the drive unit (18); and an electronic unit (26) for controlling the drive unit (18), the drive unit (18) being arranged in the drive section (16) and the electronic unit (26) and the battery unit (24) being arranged in the handle section (14). According to the invention, a main extension plane (28) of the electronics unit (26) intersects a drive axis (30) of the drive unit (18) on the side facing away from the tool receptacle (22).

Description

Background Art

[0001] A machine tool device has been proposed, comprising a housing unit having at least one handle section and at least one drive section; a drive unit for driving a tool; a tool receptacle for connecting the tool to the drive unit; a battery unit for supplying energy to the drive unit; and an electronics unit for controlling the drive unit, wherein the drive unit is arranged in the drive section and the electronics unit and the battery unit are arranged in the handle section. Summary of the invention

[0002] The present invention is based on a machine tool device, which has a housing unit, which has at least one handle section and at least one drive section; a drive unit for driving a tool; a tool receiving part for connecting the tool to the drive unit, a battery unit for supplying energy to the drive unit, and an electronic unit for controlling the drive unit, wherein the drive unit is arranged in the drive section and the electronic unit and the battery unit are arranged in the handle section.

[0003] It is proposed that a main extension plane of the electronics unit intersects the drive axis of the drive unit on a side facing away from the tool receptacle.

[0004] "Machine tool device" should be understood as at least a part of a machine tool, especially a subassembly. The machine tool device can also constitute the entire machine tool. "Machine tool" should be understood as a machine for processing a workpiece. The machine tool is configured to be battery-operated, and in addition to battery operation, it is also configured to be wired. The machine tool is preferably configured as a portable machine tool, especially a handheld machine tool. "Portable machine tool" should be understood here as a machine tool that can be transported by an operator without a transport machine. The portable machine tool preferably has a mass of less than 40kg, preferably less than 10kg and particularly preferably less than 5kg. The portable machine tool is preferably configured as a grinder, for example, as an angle grinder, preferably as a burr grinder. However, alternatively, the portable machine tool can be configured as a battery screwdriver and / or a drill and / or an impact drill. In addition, it is conceivable that the portable machine tool is configured as a jigsaw, a circular saw, a chain saw, a grinder, a planer, a garden tool machine, a reciprocating saw, etc. However, it is also conceivable for the power tool to have another embodiment which appears appropriate to a person skilled in the art, for example as a garden tool, an electric planer, a chiseling hammer or a multifunctional machine.

[0005] The housing unit forms an outer housing of a machine tool device, wherein components of the machine tool device that are not part of the housing unit are arranged in an outer housing of the housing unit and / or on the outer housing in the assembled state of the machine tool. The housing unit comprises at least one handle section and at least one drive section. The handle section of the housing unit has at least one outer contour, which is provided for gripping, in particular holding and holding the housing unit by a user of the machine tool. Preferably, the main extension direction of the handle section and the main extension direction of the drive section are oriented at an angle to each other, in particular at an angle different from 90.00°.

[0006] In this context, a “main extension direction” of an object is understood to mean an axis which is parallel to the longest edge of the smallest geometric cuboid which still completely encloses the object.

[0007] A "drive unit" is understood to be a unit which transfers kinetic energy to another unit, in particular a mechanical unit, in particular a tool holder, by means of an energy conversion device, in particular a conversion device which converts electrical energy into mechanical energy. The other unit can be driven and in particular set in motion. The motion can in particular be a rotational motion, a linear motion, an oscillating motion or a combination of the mentioned motions.

[0008] The drive axis of the drive unit preferably extends at least substantially parallel to the main extension direction of the drive unit. The drive axis can be an axis of rotation, around which the drive unit drives the tool in the operating state. Alternatively or additionally, the drive unit can be configured to move the tool along the drive axis in the operating state, in particular in a linear motion and / or an oscillating motion. Preferably, the drive axis extends parallel and centered to the drive shaft and / or drive spindle of the drive unit. Preferably, the drive axis extends at least substantially parallel to the main extension direction of the drive section of the housing unit. "Substantially parallel" is to be understood here as an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation of less than 8.00°, advantageously less than 5.00° and particularly advantageously less than 2.00° relative to the reference direction.

[0009] The tool receiving part is preferably configured to releasably connect the tool to the drive unit, in particular the drive shaft and / or the drive spindle of the drive unit, and for this purpose comprises at least one connecting element, preferably a positive locking and / or non-positive locking element. The tool receiving part can be configured, for example, to establish a screw connection and / or a plug connection and / or a latching connection and / or a clamping connection and / or a tensioning connection and / or other connections between the tool and the drive unit that appear to be meaningful to a person skilled in the art. A "tool" is to be understood here as a tool that is arranged and / or can be arranged directly or indirectly on a machine tool, which tool in at least one operating state at least partially comes into direct contact with at least one workpiece and / or processes a workpiece.

[0010] A "battery unit" is to be understood as a unit which is configured to supply energy, in particular chemical energy and / or preferably electrical energy, to a drive unit and which is capable of absorbing, storing and releasing this energy at least temporarily. For this purpose, the battery unit comprises at least one energy storage device, in particular a battery, such as a lithium-ion battery and / or a lithium-polymer battery and / or a nickel-metal hydride battery or the like. The battery is preferably configured as a battery cell. The battery unit may have a plurality of energy storage devices, in particular battery cells. The battery cells are preferably configured to provide a peak voltage of at least 12 V in an operating state to supply energy to the drive unit. Alternatively, the battery unit may also be configured to provide a lower or higher peak voltage, for example 14 V or 18 V, in an operating state.

[0011] An "electronic unit" is to be understood in particular as a unit having a processor unit and a memory unit and an operating program stored in the memory unit. The electronic unit is provided for controlling the drive unit. It is also conceivable that the electronic unit is provided for controlling and / or supplying other components of the machine tool, such as display elements, interfaces, etc. Particularly preferably, the drive unit has at least one motor which is designed as an electronically commutated electric motor, wherein the electronic unit is provided for commutating the electric motor. The electronic unit preferably comprises at least one circuit board on which in particular the processor unit and / or the memory unit are arranged.

[0012] A “main extension plane” of a structural unit or element is understood to be a plane which is parallel to the largest side surface of the smallest possible imaginary cuboid which still completely encloses the structural unit or element and which extends in particular through the center of the cuboid.

[0013] In this article, the numerals placed before certain terms, such as "first" and "second", are only used to distinguish objects and / or the distribution of objects to each other and do not imply the total number and / or order of objects. In particular, "second object" does not necessarily imply the existence of "first object".

[0014] “Provided” is to be understood in particular as being specially configured, specially designed and / or specially equipped. An object being provided for a specific function is preferably to be understood as meaning that the object satisfies and / or performs the specific function in at least one application and / or operating state.

[0015] The configuration according to the invention can provide a machine tool device with advantageous properties in terms of structural design. A particularly compact machine tool can be advantageously provided. At the same time, particularly advantageous ergonomics can be achieved, so that a particularly comfortable, simple and intuitive operation of the machine tool can be achieved.

[0016] It is further proposed that the projection surface of the battery cell projected along the axis of movement of the battery cell has a contour that at least substantially surrounds the electronic unit. This advantageously enables a particularly compact arrangement. The “axis of movement” of the battery cell is to be understood as an axis along which at least a portion of the battery cell, in particular at least one battery cell, preferably the entire battery cell can be introduced into the handle section of the battery cell and led out of the handle section of the housing unit. Preferably, the axis of movement of the battery cell is at an angle relative to the drive axis of the drive unit. The axis of movement of the battery cell is at an angle of at least 60.00° and at most 120.00° relative to the drive axis of the drive unit. The axis of movement of the battery cell is at an angle of at least 60.00°, advantageously at least 80.00°, particularly advantageously at least 90.00°, preferably at least 91.00°, advantageously at least 92.00° and particularly preferably at least 93.00° relative to the drive axis of the drive unit. The axis of movement of the battery unit is in particular at an angle of at most 120.00°, advantageously at most 110.00°, particularly advantageously at most 100.00°, preferably at most 99.00°, advantageously at most 98.00° and particularly preferably at most 97.00° relative to the drive axis of the drive unit. In the most preferred configuration, the axis of movement of the battery unit is at an angle of 95.00° relative to the drive axis of the drive unit. In this context, a "projection surface" of a battery cell is to be understood as a surface of a two-dimensional image of the battery cell, which is produced in the case of a parallel projection of the beam along and / or parallel to the axis of movement of the battery cell. Preferably, the axis of movement of the battery cell is at least substantially parallel to the main extension direction of the handle section of the housing unit.

[0017] It is further proposed that the main extension plane of the electronics unit is at an angle relative to the drive axis and the axis of movement of the battery unit. This configuration can advantageously achieve a particularly compact configuration. The main extension plane of the electronics unit is at an angle relative to the drive axis, in particular at an angle of at least 20.00° and at most 85.00°. The main extension plane of the electronics unit is at an angle relative to the drive axis, in particular at least 20.00°, advantageously at least 30.00°, particularly advantageously at least 40.00°, preferably at least 50.00°, advantageously at least 60.00° and particularly preferably at least 70.00°. The main extension plane of the electronics unit is at an angle relative to the drive axis, in particular at most 80.00°, advantageously at most 77.00°, particularly advantageously at most 76.00°, preferably at most 75.00°, advantageously at most 74.00° and particularly preferably at most 73.00°. In the most preferred configuration, the main extension plane of the electronics unit is at an angle of exactly 72° relative to the drive axis.

[0018] It is further proposed that the axis of movement of the battery unit encloses an angle of inclination of at least 20.00° and at most 50.00°, in particular at least 21.00° and at most 46.00°, preferably at least 22.00° and at most 43.00°, preferably 23° with the main extension plane of the electronics unit. If the axis of movement of the battery unit encloses an angle of inclination of at least 28.00° and at most 50.00° with the main extension plane of the electronics unit, the electronics unit can advantageously be arranged in a particularly space-saving manner in the housing unit. A relatively small angle of inclination of at least 20°, preferably exactly 23°, can prove to be advantageous in particular for a space-saving arrangement of particularly large and therefore particularly powerful electronics units.

[0019] In addition, it is proposed that the machine tool device has an operating element arranged on the handle section for operating the electronic unit, wherein the operating element has a longest extension extending perpendicular to the drive axis, which corresponds to at least 25.00% of the longest extension of the handle section extending perpendicular to the drive axis. This configuration can advantageously improve ergonomics and further increase operating comfort. It is advantageously possible to achieve a simple and intuitive operation of the electronic unit. In particular, if the operating element has a longest extension extending perpendicular to the drive axis, the electronic unit can be operated with multiple fingers at the same time, and the longest extension corresponds to at least 25.00% of the longest extension of the handle section extending perpendicular to the drive axis. The longest extension of the operating element extending perpendicular to the drive axis corresponds to at least 30.00%, advantageously at least 35.00%, particularly advantageously at least 40.00%, preferably at least 45.00% and particularly preferably at least 50.00% of the longest extension of the handle section extending perpendicular to the drive axis.

[0020] It is further proposed that the electronic unit is bounded by a bounding plane extending parallel to the drive axis, which intersects the battery unit and / or the operating element. This advantageously further improves the compactness. Preferably, the bounding plane intersects both the battery unit and the operating element. In this context, a "bounding plane" is to be understood as an imaginary plane extending parallel to the drive axis and having no intersection with the electronic unit.

[0021] Furthermore, it is proposed that the electronic unit is bounded by another bounding plane extending parallel to the drive axis, which intersects the operating element. This configuration can advantageously achieve a particularly compact configuration of the machine tool device. In particular, if the electronic unit is bounded by a bounding plane extending parallel to the drive axis and by another bounding plane extending parallel to the drive axis, an optimized arrangement of the electronic unit relative to the operating element can be achieved.

[0022] It is further proposed that the handle section has a circumference of at least 130.00 mm and at most 140.00 mm in the region of the operating element. This configuration can advantageously further improve ergonomics. In particular, if the handle section has a circumference of at least 130.00 mm and at most 140.00 mm in the region of the operating element, it is possible to simply grip the handle section in the region of the operating element and thus to simply operate the operating element. Preferably, the handle section has a circumference of at least 131.00 mm, preferably at least 132.00 mm and particularly preferably 133.00 mm in the region of the operating element. The handle section has in particular a circumference of at most 139.00 mm, advantageously at most 138.00 mm, particularly advantageously at most 137.00 mm, preferably at most 136.00 mm, advantageously at most 135.00 mm and particularly preferably at most 134.00 mm in the region of the operating element.

[0023] In addition, it is proposed that the cross section of the handle section is configured as an ellipse and / or a polygon with rounded corners in the area of ​​the operating element, and has a width of at least 35.00 mm and at most 40.00 mm and a height of at least 45.00 mm and at most 50.00 mm. This configuration can advantageously further improve ergonomics. The ellipse and / or polygonal cross section of the handle section in the area of ​​the operating element also advantageously obtains an improved, particularly optimized control for the user of the machine tool device, because the shape lock that prevents the handle section from twisting is achieved by the ellipse and / or polygonal housing shape. The cross section of the handle section preferably has a width of at least 36.00 mm and at most 39.00 mm, preferably a width of at least 36.50 mm and at most 38.00 mm in the area of ​​the operating element. The cross section of the handle section preferably has a height of at least 46.00 mm and at most 49.00 mm, preferably at least 46.50 mm and at most 48.00 mm in the area of ​​the operating element.

[0024] In addition, it is proposed that the electronic unit includes a circuit board having an outer contour different from a rectangle. This can advantageously achieve an improved arrangement of the electronic unit, thereby further advantageously providing a particularly compact machine tool device. In particular, if the electronic unit arranged in the handle section includes a circuit board having an outer contour different from a rectangle, a very compact outer contour of the housing unit in the handle section can be achieved. The outer contour of the circuit board that is different from a rectangle can be configured, for example, as a triangle or a trapezoid or a polygon with more than four corners, without being limited thereto. The outer contour of the circuit board that is different from a rectangle can be asymmetrical and, for example, have the shape of a right-angled trapezoid that is not a rectangle. Preferably, the outer contour of the circuit board that is different from a rectangle is symmetrical, especially mirror-symmetrical, about at least one symmetry axis, especially the longitudinal center axis of the circuit board. For example, the outer contour of the circuit board that is different from a rectangle can have the shape of an isosceles triangle, or the shape of an isosceles and symmetrical trapezoid that is not a rectangle, or the shape of a regular polygon with more than four corners and / or is composed of one or more isosceles triangles and / or one or more isosceles and symmetrical trapezoids and / or one or more regular polygons with more than four corners. The longitudinal center axis of the circuit board is parallel to the main extension direction of the circuit board. The symmetrical configuration of the printed circuit board advantageously enables a particularly compact and space-saving arrangement in the handle section. In addition, the housing unit can also have a symmetrical, in particular oval and / or polygonal cross section in the region of the printed circuit board, thereby advantageously enabling particularly good ergonomics, in particular for both right-handed and left-handed people.

[0025] It is further proposed that the circuit board has rounded corners with a radius of 1.00 mm to 4.00 mm. This configuration advantageously enables a compact circuit board and, with it, a compact housing unit in a subsection of the handle region surrounding the electronics unit. In particular, the outer contour of the circuit board can be particularly well adapted to the cross section of the handle section in the region of the actuating element, preferably an elliptical and / or polygonal cross section. The circuit board in particular has rounded corners with a radius of 1.25 mm to 3.75 mm, preferably a radius of 1.50 mm to 3.50 mm.

[0026] It is further proposed that the printed circuit board has a longitudinal extension of at least 58.00 mm and at most 84.00 mm. This can advantageously further improve the compactness. The longitudinal extension of the printed circuit board is in particular at least 60.00 mm, advantageously at least 62.00 mm, particularly advantageously at least 64.00 mm, preferably at least 66.00 mm, advantageously at least 68.00 mm and particularly preferably at least 70.00 mm. The longitudinal extension of the printed circuit board is in particular at most 83.00 mm, advantageously at most 82.00 mm, particularly advantageously at most 81.00 mm, preferably at most 80.00 mm, advantageously at most 77.00 mm and particularly preferably at most 75.00 mm. In the most preferred configuration, the longitudinal extension of the printed circuit board is exactly 74.00 mm.

[0027] It is further proposed that the circuit board has a maximum width extension of at least 28.00 mm and at most 45.00 mm. This can further improve the compactness. The maximum width extension of the circuit board is advantageously at least 29.00 mm, particularly advantageously at least 30.00 mm, preferably at least 31.00 mm, advantageously at least 32.00 mm and particularly preferably at least 33.00 mm. The maximum width extension of the circuit board is advantageously at most 44.00 mm, particularly advantageously at most 43.00 mm, preferably at most 42.00 mm, advantageously at most 41.00 mm and particularly preferably at most 40.00 mm. In the most preferred configuration, the maximum width extension of the circuit board is exactly 39.00 mm.

[0028] In addition, it is proposed that the circuit board has two first side edges of equal size, which respectively have a first angle of at least 13.0° and at most 33.0° relative to the longitudinal direction of the circuit board. This configuration can advantageously achieve a particularly compact outer contour of the circuit board, which in turn can advantageously achieve a particularly compact outer contour of the housing unit in the subsection of the handle area surrounding the electronic unit. The two first side edges of equal size respectively have a first angle of at least 14.0°, advantageously at least 15.0°, particularly advantageously at least 16.0°, preferably at least 17.0°, advantageously at least 18.0° and particularly preferably at least 19.0° relative to the longitudinal direction of the circuit board. The two first side edges of equal size respectively have a first angle of at least 32.0°, advantageously at most 31.0°, particularly advantageously at most 30.0°, preferably at most 29.0°, advantageously at most 28.0° and particularly preferably at most 27.0° relative to the longitudinal direction of the circuit board. In the most preferred embodiment, the two first side edges of equal size each have a first angle of at least 20.0° and at most 25.0°, preferably exactly 23.0°, relative to the longitudinal direction of the circuit board.

[0029] It is further proposed that the circuit board has two second side edges of equal size, which respectively have a second angle of at least 5.0° and at most 25.0° relative to the longitudinal direction of the circuit board. As a result, the outer contour of the circuit board can be advantageously configured even more compactly, thereby also further advantageously producing an even more compact outer contour of the housing unit in the subsection of the handle area surrounding the electronic unit. The two second side edges of equal size respectively have a second angle of at least 6.0°, advantageously at least 7.0°, particularly advantageously at least 8.0°, preferably at least 9.0°, advantageously at least 10.0° and particularly preferably at least 11.0° relative to the longitudinal direction of the circuit board. Advantageously, the two first side edges of equal size respectively have a second angle of at least 24.0°, advantageously at most 23.0°, particularly advantageously at most 22.0°, preferably at most 21.0°, advantageously at most 20.0° and particularly preferably at most 19.0° relative to the longitudinal direction of the circuit board. In the most preferred embodiment, the two first side edges of equal size each have a second angle of at least 12.0° and at most 18.0°, preferably exactly 15.0°, relative to the longitudinal direction of the printed circuit board.

[0030] Furthermore, it is proposed that the printed circuit board has a width of at least 1850 mm. 2 And up to 2700mm 2 The main outer surface of the circuit board has a width of at least 1900 mm. 2 , advantageously at least 1950 mm 2 , particularly advantageously at least 2000 mm 2 , preferably at least 2050 mm 2 and particularly preferably at least 2100 mm 2 The circuit board has a main outer surface of at most 2650mm 2 , advantageously up to 2600 mm 2 , particularly advantageously up to 2550 mm 2 , preferably at most 2500 mm 2 and particularly preferably at most 2450 mm 2The main outer surface of the circuit board. The "main outer surface" is to be understood here as the available outer surface of the circuit board, on which the electrical and / or electronic components of the electronic unit, such as semiconductor switching elements and capacitors, etc., are placed in the assembled state of the electronic unit. The main outer surface of the circuit board includes at least two largest surface sides of the circuit board, in particular the upper side and the lower side. Preferably, the inclination angle between the movement axis of the battery cell and the main extension plane of the electronic unit is matched to the size of the main outer surface of the circuit board. For example, the inclination angle between the movement axis of the battery cell and the main extension plane of the electronic unit is 2200 mm on the main outer surface of the circuit board. 2 In the case of 30.00°, the main outer surface of the circuit board is 1850mm 2 In the case of the battery unit, the tilt angle between the axis of movement of the battery unit and the main extension plane of the electronic unit is preferably 40.00°. For the circuit board, it is 2700 mm 2 In the case of a particularly large main outer surface of the housing unit, the inclination angle between the axis of movement of the battery unit and the main extension plane of the electronics unit is preferably 22.00°. If the inclination angle between the axis of movement of the battery unit and the main extension plane of the electronics unit is matched to the size of the main outer surface of the circuit board, a machine tool device can advantageously be provided which has the smallest possible grip section in the area of ​​the grip section of the housing unit and at the same time has the largest possible main outer surface of the circuit board. Thus, a particularly ergonomic and at the same time particularly powerful machine tool device can be provided.

[0031] In a further aspect of the invention, which can be considered both independently and in combination with the above-mentioned aspects of the invention, it is provided that the machine tool device comprises a cooling unit for cooling the electronics unit, the cooling unit comprising a cooling unit having a diameter greater than 3000 mm. 2 The cooling unit is provided with a main cooling body having a cooling body surface of at least 3100 mm. This structure can provide a machine tool device with advantageous characteristics in terms of structural design. In particular, a particularly compact machine tool device with an advantageous high cooling performance can be provided. The cooling unit is provided for cooling the electronic unit and can also be provided for cooling other units of the machine tool device, in particular for cooling the battery unit and / or the drive unit. The main cooling body of the cooling unit has in particular a surface area of ​​at least 3100 mm. 2 , advantageously at least 3200 mm 2 , particularly advantageously at least 3300 mm 2 , preferably at least 3400 mm 2 , advantageously at least 3500 mm 2 and particularly preferably at least 3600 mm 2The cooling body surface of the cooling body is in particular 10.00%, advantageously at least 20.00%, particularly advantageously at least 30.00%, preferably at least 40.00%, advantageously at least 50.00% and particularly preferably at least 60.00% larger than the main outer surface of the circuit board of the electronic unit. Preferably, the housing unit comprises at least one air inlet, preferably a plurality of air inlets and at least one air outlet, preferably a plurality of air outlets. Preferably, the cooling unit comprises at least one fan, which is arranged to suck in cooling air via at least one air inlet of the housing unit, to convey the cooling air to the area to be cooled in the housing unit, and in particular to guide the cooling air from the main cooling body and / or the auxiliary cooling body of the cooling unit through and out via at least one air outlet of the housing unit.

[0032] In addition, it is proposed that the cooling unit has at least one auxiliary cooling body, which is connected to the main cooling body by at least one connecting element, and this configuration can further improve the efficiency. Preferably, in the assembled state of the machine tool device, the main cooling body is at least partially arranged on the first side of the circuit board of the electronic unit, specifically preferably arranged on the lower side of the circuit board facing away from the battery unit in the assembled state. In the assembled state of the machine tool device, the auxiliary cooling body is preferably at least partially arranged on the second side of the circuit board of the electronic unit opposite to the first side, specifically preferably arranged on the upper side of the circuit board facing the battery unit. Preferably, the connecting element extends from the main cooling body to the auxiliary cooling body, starting from the first side of the circuit board, in particular from the lower side of the circuit board facing away from the battery unit in the assembled state of the machine tool device, to the second side of the circuit board, in particular the upper side of the circuit board facing the battery unit, specifically in particular through the through hole in the circuit board or alternatively along the side edge of the circuit board. The connecting element can be configured, for example, as a heat pipe and / or a copper riser (Kupfersteiger) etc. without being limited thereto. The auxiliary cooling body of the cooling unit has in particular a diameter of at least 300 mm. 2 , advantageously at least 310 mm 2 , particularly advantageously at least 320 mm 2 , preferably at least 330 mm 2 , advantageously at least 340 mm 2 and particularly preferably at least 350 mm 2 In addition to the auxiliary cooling body, the cooling unit may also have at least one further auxiliary cooling body.

[0033] It is further proposed that the ratio between the cooling body surface of the primary cooling body and the cooling body surface of the auxiliary cooling body is at least 10.00 to 1.00. This configuration makes it possible to provide a particularly compact cooling unit with an advantageously high cooling performance. In particular, the ratio between the cooling body surface of the primary cooling body and the cooling body surface of the auxiliary cooling body is at least 10.25 to 1, advantageously at least 10.50 to 1, particularly advantageously at least 10.75 to 1, preferably at least 10.75 to 1, advantageously at least 11.00 to 1, preferably at least 11.25 to 1 and particularly preferably at least 11.50 to 1.

[0034] It is further proposed that the battery unit is designed for continuously supplying energy to the drive unit with a continuous current of at least 20 A and at most 45 A. This configuration can advantageously achieve a particularly high level of comfort. The battery unit is particularly designed for continuously supplying energy to the drive unit with a continuous current of at least 22 A, advantageously at least 24 A, particularly advantageously at least 25 A, advantageously at least 26 A, preferably at least 27 A and particularly preferably at least 28 A. The battery unit is particularly designed for continuously supplying energy to the drive unit with a continuous current of at most 43 A, advantageously at most 41 A, particularly advantageously at most 39 A, advantageously at most 37 A, preferably at most 35 A and particularly preferably at most 33 A. In the most preferred configuration, the battery unit is designed for continuously supplying energy to the drive unit with a continuous current of 28 A.

[0035] Furthermore, it is proposed that the ratio of the total cooling body surface of the cooling unit to the continuous current provided by the battery unit for operating the drive unit is at least 100 mm 2 This configuration allows particularly reliable and safe continuous operation. In particular, if the ratio between the total cooling body surface of the cooling unit and the continuous current provided by the battery unit for operating the drive unit is at least 100 mm 2 In particular, the ratio between the entire cooling body surface of the cooling unit and the continuous current provided by the battery unit for operating the drive unit is at least 105 mm 2 Advantageously at least 110mm than 1A 2 More than 1A, particularly advantageously at least 115mm 2 Than 1A, preferably at least 120mm 2 Advantageously at least 125mm than 1A 2 1A and particularly preferably at least 130 mm 2 In this context, “entire heat sink surface” is to be understood as the sum of the individual heat sink surfaces of all heat sinks of the heat sink unit, in particular at least the heat sink surface of the main heat sink and, if appropriate, additionally of one or more auxiliary heat sinks.

[0036] It is further proposed that the drive unit comprises a motor designed as a direct drive, and that the battery unit is designed for continuous operation of the motor for more than at least 3 minutes. This advantageously makes it possible to achieve a particularly compact design with an advantageously long continuous operation time. "Direct drive" is to be understood here as meaning that the motor is provided for driving a drive shaft and / or a drive spindle of the drive unit directly, in particular without engaging a transmission and / or without engaging a clutch, to which the tool is connected via a tool receptacle. The battery unit is particularly designed for continuous operation of the motor for at least 3.25 minutes, advantageously at least 3.50 minutes, particularly advantageously at least 3.75 minutes, preferably at least 4.00 minutes, advantageously at least 4.25 minutes and particularly preferably at least 4.50 minutes.

[0037] It is further proposed that the motor has a diameter of at least 30.00 mm and at most 48.00 mm perpendicular to the drive axis of the drive unit. This configuration can advantageously provide a particularly compact machine tool device. The motor has a diameter of at least 31.00 mm, advantageously at least 32.00 mm, particularly advantageously at least 33.00 mm, preferably at least 34.00 mm, advantageously at least 35.00 mm and particularly preferably at least 36.00 mm perpendicular to the drive axis of the drive unit. The motor has a diameter of at most 45.00 mm, advantageously at most 44.00 mm, particularly advantageously at most 43.00 mm, preferably at most 42.00 mm, advantageously at most 41.00 mm and particularly preferably at most 40.00 mm perpendicular to the drive axis of the drive unit. In the most preferred configuration, the motor has a diameter of 38.00 mm perpendicular to the drive axis of the drive unit.

[0038] It is further proposed that the motor has a maximum longitudinal extension parallel to the drive axis of the drive unit of at least 17.00 mm and at most 30.00 mm. This can advantageously provide a particularly compact machine tool device. The motor has a maximum longitudinal extension parallel to the drive axis of the drive unit of in particular at least 18.00 mm, advantageously at least 19.00 mm, particularly advantageously at least 20.00 mm, preferably at least 21.00 mm, advantageously at least 22.00 mm and particularly preferably at least 23.00 mm. The motor has a maximum longitudinal extension parallel to the drive axis of the drive unit of in particular at most 29.00 mm, advantageously at most 28.00 mm, preferably at most 27.00 mm, advantageously at most 26.00 mm and particularly preferably at most 25.00 mm. In the most preferred configuration, the motor has a maximum longitudinal extension parallel to the drive axis of the drive unit of 25.00 mm.

[0039] The motor of the drive unit can be, for example, a brushed DC motor. However, in a particularly preferred embodiment, it is proposed that the motor is designed as an electronically commutated electric motor. This can advantageously provide a particularly compact and efficient motor with high efficiency and thus a particularly efficient machine tool device. Preferably, the electronic unit is configured for commutation of the motor.

[0040] It is further proposed that the battery unit has a number of battery cells of at least three. Advantageously, a high battery performance can thereby be provided. The battery unit can have a number of battery cells corresponding to a multiple of three, preferably twice three.

[0041] In another aspect of the invention, which can be considered not only independently but also in combination with the aforementioned aspects of the invention, it is proposed that the housing unit has a sub-region in the drive section that tapers conically in the direction of the tool receiving part. This sub-region encloses an angle of inclination of greater than 1.00° and less than 5.00° with the drive axis of the drive unit. With this configuration of the machine tool device, particularly high operating comfort can be advantageously achieved. If the housing unit has a sub-region in the drive section that tapers conically in the direction of the tool receiving part, which sub-region encloses an angle of inclination of greater than 1.00° and less than 5.00° with the drive axis of the drive unit, it is advantageously possible to achieve particularly good observation of the tool connected to the tool receiving part and / or the workpiece to be processed by means of the tool, whereby operating comfort and operating safety can be further advantageously improved. The sub-region that tapers conically in the drive section of the housing unit in the direction of the tool receptacle advantageously encloses an angle of inclination of greater than 1.25°, particularly advantageously greater than 1.50°, preferably greater than 1.75°, advantageously greater than 2.00° and particularly preferably greater than 2.25° with the drive axis of the drive unit. The sub-region that tapers conically in the drive section of the housing unit in the direction of the tool receptacle in particular encloses an angle of inclination of less than 4.50°, advantageously less than 4.00°, particularly advantageously less than 3.50°, preferably less than 3.25°, advantageously less than 3.00° and particularly preferably less than 2.75° with the drive axis of the drive unit. In the most preferred embodiment, the sub-region that tapers conically in the drive section of the housing unit in the direction of the tool receptacle encloses an angle of inclination of exactly 2.50° with the drive axis of the drive unit.

[0042] In addition, it is proposed that the drive section has a spherical cap-shaped surface section on the side facing away from the tool receiving part in the viewing direction along the drive axis, whose maximum diameter corresponds to the maximum diameter of the conically tapering sub-area. As a result, the operating comfort can be further improved. It is advantageously possible to achieve a particularly good observation of the workpiece to be processed. "Spherical cap" should be understood here as the outer peripheral surface of the spherical cap. "Spherical cap" should be understood here as a geometric body describing a part of a sphere, which is obtained by a cross section of the sphere and a plane, and is alternatively also called a spherical segment and / or a spherical segment and / or a spherical cap and / or a spherical segment. The machine tool device can have a display unit for displaying operating information, such as the current charge state of the battery unit and / or the current temperature of the battery unit and / or the drive unit and / or the electronic unit and / or the current rotational speed and / or the current torque of the drive unit. The display unit preferably includes at least one display element, such as a display and / or at least one LED, etc., which is arranged in the spherical cap-shaped surface section of the housing unit. As a result, the operating comfort can be further improved. Advantageously, operating information can be displayed to a user of the machine tool during machining of a workpiece in such a way that it is clearly visible in the spherical cap-shaped surface section.

[0043] It is further proposed that the spherical cap-shaped surface section and the conically tapering sub-region merge into one another. This configuration advantageously makes it possible to provide a machine tool device having a particularly compact housing unit, which is also characterized by advantageous properties with regard to both operating comfort and operating safety. The spherical cap-shaped surface section and the conically tapering sub-region “merge into one another” to be understood as meaning that the spherical cap-shaped surface section has a diameter that increases in the direction of the tool receptacle in the viewing direction along the drive axis and ends in the region of its maximum diameter, wherein the conically tapering sub-region directly adjoins the end of the spherical cap-shaped surface section and has its maximum diameter at this end, and wherein the diameter of the conically tapering sub-region decreases from the end to a minimum diameter in the viewing direction along the drive axis in the direction of the tool receptacle.

[0044] It is further proposed that the housing unit has a maximum diameter of at most 50.00 mm in the conically tapering subregion perpendicular to the drive axis. This configuration advantageously enables a particularly good view of the workpiece to be machined. The housing unit has in particular a diameter of at most 49.75 mm, advantageously at most 49.50 mm, particularly advantageously at most 49.25 mm, preferably at most 49.00 mm, advantageously at most 48.75 mm and particularly preferably at most 48.50 mm in the conically tapering subregion perpendicular to the drive axis.

[0045] It is further proposed that the conically tapering sub-region has an extension dimension of at least 44.00 mm along the inclination direction relative to the drive axis. This advantageously enables a particularly good observation of the workpiece to be machined. The conically tapering sub-region has an extension dimension of at least 45.00 mm, advantageously at least 46.00 mm, particularly advantageously at least 47.00 mm, preferably at least 48.00 mm, advantageously at least 49.00 mm and particularly preferably at least 50.00 mm along the inclination direction relative to the drive axis. The conically tapering sub-region has an extension dimension of at most 56.00 mm, advantageously at most 55.00 mm, particularly advantageously at most 54.00 mm, preferably at most 53.00 mm, advantageously at most 52.00 mm and particularly preferably at most 51.00 mm along the inclination direction relative to the drive axis, thereby advantageously ensuring the compactness of the machine tool device.

[0046] It is further proposed that the housing unit has a minimum width extension in the transition region between the drive section and the handle section, which corresponds to at most 80.0% of the maximum diameter of the conically tapering sub-region. This configuration can advantageously further improve ergonomics. The housing unit has a minimum width extension in the transition region between the drive section and the handle section, which corresponds to in particular at most 79.00%, advantageously at most 78.00%, particularly advantageously at most 77.00%, preferably at most 76.00%, advantageously at most 75.00% and particularly preferably at most 74.00% of the maximum diameter of the conically tapering sub-region. Preferably, the housing unit has a constriction in the transition region, which extends vertically along the entire circumferential direction in the viewing direction and has an outer contour, the shape of which corresponds at least substantially to the shape of an ellipse, wherein the minimum width extension corresponds in particular to the minimum diameter of the ellipse.

[0047] It is further proposed that the housing unit has a maximum width extension in the handle section, which corresponds at most to the maximum diameter of the conically tapering sub-region. As a result, the ergonomics can be further improved. The housing unit preferably has at least one further conically tapering sub-region in the handle section, which extends from the region of the maximum width extension of the handle section in the direction of the drive section to a transition region with the minimum width extension of the housing unit. As a result, the ergonomics can be further improved. In particular, the further conically tapering sub-region of the housing unit encloses a further inclination angle of greater than 1.00° and less than 10.00° with the axis of movement of the battery unit. Advantageously, the further conically tapering sub-region encloses a further inclination angle of greater than 1.50°, particularly advantageously greater than 2.00°, preferably greater than 2.50°, advantageously greater than 3.00° and particularly preferably greater than 3.50° with the axis of movement of the battery unit. The further conically tapering subregion encloses in particular a further inclination angle of less than 9.50°, advantageously less than 9.00°, particularly advantageously less than 8.50°, preferably less than 8.00°, advantageously less than 7.50° and particularly preferably less than 7.00° with the axis of movement of the battery cell.

[0048] It is further proposed that the housing unit has in the drive section a straight end region arranged below the conically tapering subregion in the direction of the tool receptacle, the diameter of which end region corresponds to the smallest diameter of the conically tapering subregion. This configuration advantageously allows a particularly high degree of flexibility in the structural design of the machine tool device. The housing unit has in the drive section a maximum height extension extending parallel to the drive axis, which extends from the lower edge of the straight end region to the highest point of the spherical cap-shaped surface section. Preferably, the height extension extending parallel to the drive axis corresponds to at least 50.00%, preferably at least 51.00%, particularly preferably at least 52.00% of the maximum height extension of the housing unit in the drive section.

[0049] The invention also relates to a machine tool having a machine tool device according to one of the above-described embodiments. This machine tool is also characterized by its compact size and its favorable ergonomics, which are achieved by the embodiment of the machine tool device according to the invention.

[0050] The invention also relates to a machine tool system having a machine tool as described above and having at least one tool for detachable connection to a tool receptacle. Such a machine tool system is characterized by advantageous properties of the machine tool which are achieved by the configuration of the machine tool device according to the invention in combination with the tool.

[0051] It is further proposed that the maximum diameter of the tool is greater than the maximum diameter of the conically tapering subregion in the drive section of the housing unit. This configuration makes it possible to achieve particularly comfortable and safe operation of the machine tool system. If the maximum diameter of the tool is greater than the maximum diameter of the conically tapering subregion in the drive section of the housing unit, it is particularly possible to achieve a good view of at least one subregion of the tool and thus a particularly comfortable and safe processing of the workpiece by means of the machine tool system. The maximum diameter of the tool is greater than the maximum diameter of the conically tapering subregion in the drive section of the housing unit by at least 1.00%, advantageously by at least 1.50%, particularly advantageously by at least 2.00%, preferably by at least 2.50%, advantageously by at least 3.00% and particularly preferably by at least 3.50%. The tool can, for example, have a maximum diameter of at least 50.00 mm.

[0052] The machine tool device according to the invention, the machine tool system according to the invention, and the machine tool according to the invention are not to be limited to the applications and embodiments described above. In particular, the machine tool device according to the invention and / or the machine tool system according to the invention and / or the machine tool according to the invention may have numbers that deviate from the numbers of the individual elements, components and units and method steps described herein, in particular to satisfy the working method described herein. In addition, in the value ranges given in the present disclosure, the values ​​that are within the extreme values ​​are also to be regarded as disclosed and can be used arbitrarily. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Further advantages are derived from the following description of the drawings. Embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain features in multiple combinations. A person skilled in the art can also consider the features individually and combine them into other meaningful combinations. The drawings show:

[0054] Figure 1 : A schematic side view of a machine tool with a machine tool device,

[0055] Figure 2 : A schematic sectional view of a machine tool system having a machine tool and a tool for releasably connecting to a tool receptacle of the machine tool device,

[0056] Figure 3 : A schematic sectional view of a handle section of a housing unit of a machine tool device,

[0057] Figure 4 : A schematic perspective view of a battery unit and an electronics unit of a machine tool device in a viewing direction along the axis of movement of the battery unit,

[0058] Figure 5 : Schematic top view of a circuit board of an electronic unit,

[0059] Figure 6 : Another schematic side view of a machine tool system having a machine tool and a tool,

[0060] Figure 7 : A schematic top view of a machine tool with a machine tool device,

[0061] Figure 8 : Another schematic sectional view of a machine tool having a machine tool device, and

[0062] Fig. 9 : A schematic three-dimensional view of a main cooling body of a cooling unit of a machine tool device for cooling an electronic unit. DETAILED DESCRIPTION

[0063] Figure 1 A machine tool 80 is shown in a schematic perspective view. In the present exemplary embodiment, the machine tool 80 is designed as a burr grinder.

[0064] The machine tool 80 comprises a machine tool device 10. The machine tool device 10 comprises a housing unit 12 having at least one handle section 14 and at least one drive section 16. The machine tool device 10 has a drive unit 18 (see FIG. 1 ) for driving a tool 20. Figure 2 The power tool device 10 has a tool receptacle 22 for connecting a tool 20 to the drive unit 18 .

[0065] The machine tool 80 is part of the machine tool system 78. The machine tool system 78 comprises a machine tool 80 having a machine tool device 10 and at least a tool 20 for connection to a tool receiving portion 22 of the machine tool device 10 (see Figure 2 ).

[0066] Figure 2 A schematic sectional view shows a machine tool system 78 having a machine tool 80 including a machine tool device 10 and a tool 20, wherein the tool 20 is detachably connected to a tool receptacle 22. In the present case, the tool 20 is designed as a grinding tool. In addition to the tool 20, the machine tool system 78 may also include other tools (not shown) for connection to the tool receptacle 22.

[0067] exist Figure 2 1 shows a drive unit 18 of a machine tool device 10. The drive unit 18 comprises a drive spindle 116 and a motor 122 for driving the drive spindle 116. The tool receiving portion 22 is connected to the drive spindle 116. In the operating state of the machine tool device 10, the motor 122 generates a rotational movement of the drive spindle 116 together with the tool receiving portion 22 and the tool 20 connected to the tool receiving portion 22 around the drive axis 30 of the drive unit 18. In the present case, the drive axis 30 is oriented parallel and centered with respect to the drive shaft 116.

[0068] In the present case, a main extension direction 118 of the drive section 14 of the housing unit 12 extends parallel to the drive axis 30 of the drive unit 18 .

[0069] The power tool device 10 further includes a rechargeable battery unit 24 for supplying energy to the drive unit 18 .

[0070] The power tool device 10 further comprises an electronics unit 26 for controlling the drive unit 18 . The drive unit 18 is arranged in the drive section 16 . The electronics unit 26 and the rechargeable battery unit 24 are arranged in the handle section 14 .

[0071] A main extension plane 28 of the electronics unit 26 intersects a drive axis 30 of the drive unit 18 on that side of the drive unit 18 which faces away from the tool receptacle 22 .

[0072] Main extension plane 28 of electronics unit 26 is angled relative to drive axis 30 and movement axis 32 of rechargeable battery unit 24 . Rechargeable battery unit 24 can be inserted into and removed from handle section 14 of housing unit 12 along movement axis 32 .

[0073] The main extension plane 28 of the electronics unit 26 is arranged at an angle 152 relative to the drive axis 30 of the drive unit 18 , which angle is 55.00° in the present case.

[0074] The movement axis 32 of the battery unit 24 encloses an inclination angle 38 of at least 20° and at most 50.00°, in particular at least 21.00° and at most 46.00°, preferably at least 22.00° and at most 43.00°, advantageously at least 22.00° and at most 43.00°, preferably 23.00° with the main extension plane 28 of the electronics unit 26. In the present case, the inclination angle 38 of the movement axis 32 of the battery unit 24 and the main extension plane 28 of the electronics unit 26 is 23.00°.

[0075] Movement axis 32 of battery unit 24 is at an angle 150 of at least 60.00° and at most 120.00° to drive axis 30 of drive unit 18 . Movement axis 32 of battery unit 24 is at an angle 150 of 95.00° to drive axis 30 of drive unit 18 .

[0076] In the present case, a main extension direction 120 of the handle section 14 of the housing unit 12 extends parallel to the movement axis 32 of the rechargeable battery unit 24 .

[0077] The machine tool device 10 has an operating element 40 arranged on the handle section 14 for operating the electronic unit 26. The operating element 40 has a longest extension 42 extending perpendicularly to the drive axis 30. The longest extension 42 of the operating element 40 corresponds to at least 25.00% of the longest extension 44 of the handle section 14 extending perpendicularly to the drive axis 30. Currently, the longest extension 42 of the operating element 40 corresponds to approximately 60.00% of the longest extension 44 of the handle section 14. Currently, the longest extension 44 of the handle section 14 is, for example, approximately 156 mm, and currently, the longest extension 42 of the operating element 40 is approximately 95 mm.

[0078] The electronics unit 26 is delimited by a delimiting plane 46 which extends parallel to the drive axis 30. The delimiting plane 46 intersects the battery unit 24 and / or the operating element 40. In the present case, the delimiting plane 46 intersects the battery unit 24 and the operating element 40.

[0079] Furthermore, the electronic unit 26 is delimited by a further delimiting plane 48 extending parallel to the drive axis 30 and intersecting the actuating element 40. The delimiting plane 46 and the further delimiting plane 48 are each imaginary planes that have no intersection with the electronic unit 26.

[0080] Figure 3 A schematic sectional view of a housing unit 12 is shown, which has a cross section through a handle section 14 in the region of an operating element 40. In the region of the operating element 40, the cross section of the handle section 14 is designed as an ellipse and / or a polygon with rounded corners. In the present case, the cross section of the handle section 14 is designed as an ellipse in the region of the operating element 40. The cross section of the handle section 14 has a width 52 of at least 35.00 mm and at most 40.00 mm in the region of the operating element 40. In the present case, the width 52 of the cross section is 37.00 mm. The cross section of the handle section 14 has a height 154 of at least 45.00 mm and at most 50.00 mm in the region of the operating element 40. In the present case, the height 154 of the cross section is 47.00 mm.

[0081] The grip section 14 has a circumference 50 of at least 130 mm and at most 140 mm in the region of the actuating element 40. In the present case, the circumference 50 of the grip section 14 in the region of the actuating element 40 is 133.00 mm.

[0082] Figure 4 The battery cell 24 is moved along the axis 32 (see Figure 2 ) shows the battery unit 24 and the electronics unit 26 in a schematic perspective view from the viewing direction of FIG.

[0083] A projection surface 34 of the battery cell 24 projected along the axis of movement 32 of the battery cell 24 has a contour 36 which at least substantially surrounds the electronics unit 26 . In the present case, the contour 36 of the projection surface 34 of the battery cell 24 completely surrounds the electronics unit 26 .

[0084] The electronic unit 26 includes a circuit board 54. Figure 4 The underside 140 of the circuit board 54 is shown in FIG.

[0085] exist Figure 5 1 shows a schematic top view of the upper side 138 of the circuit board 54. The circuit board 54 has an outer contour 56 which deviates from a rectangle. In the present case, the outer contour 56 of the circuit board 54 is octagonal.

[0086] The circuit board 54 has a longitudinal extension 60 of at least 58.00 mm and at most 84.00 mm. In the present case, the longitudinal extension 60 of the circuit board 54 is 74.00 mm.

[0087] The circuit board 54 has a maximum width extension 62 of at least 28.00 mm and at most 45.00 mm. Currently, the maximum width extension 62 of the circuit board 54 is 39.00 mm.

[0088] The circuit board 54 has two first side edges 64 of equal size. The first side edges 64 have a first angle 68 of at least 13.00° and at most 33.00° relative to the longitudinal direction 66 of the circuit board 54. In the present case, the first angle 68 of the first side edge 64 relative to the longitudinal direction 66 is 23.00°.

[0089] The circuit board 54 also has two second side edges 70 of equal size. The second side edges 70 have a second angle 72 of at least 5.00° and at most 25.00° relative to the longitudinal direction 66 of the circuit board. In the present case, the second angle 72 of the second side edges 70 is 15.00°.

[0090] The circuit board 54 also has two middle edges 130 of the same size extending parallel to the longitudinal direction 66. Each of the middle edges 130 connects one of the first side edges 64 to one of the second side edges 70. The circuit board 54 also has a lower edge 132 and an upper edge 134. The lower edge 132 and the upper edge 134 of the circuit board 54 are each oriented perpendicular to the longitudinal direction 66. At present, the lower edge 132 and the upper edge 134 are of the same size. The lower edge 132 connects the two first side edges 64 to each other. The upper edge 134 connects the two second side edges 70 to each other. At present, the circuit board 54 is mirror-symmetrical about its longitudinal center axis 136 extending parallel to the longitudinal direction 66.

[0091] The circuit board 54 has rounded corners 58. Each of the rounded corners 58 of the circuit board 54 connects each of the two first side edges 64 to the lower edge 132. Each of the rounded corners 58 of the circuit board 54 connects each of the two second side edges 70 to the upper edge 134. The rounded corners 58 of the circuit board 54 have a radius of 1.00 mm to 4.00 mm.

[0092] The circuit board 54 has a length of at least 1850 mm 2 And up to 2700mm 2 The main outer surface 74 is composed of the surface of the upper side 138 and the surface of the lower side 140 of the circuit board 54 (see Figure 4 ).

[0093] Figure 6 A further schematic illustration shows a machine tool system 78 having a machine tool 80 including the machine tool device 10 and a tool 20 .

[0094] The housing unit 12 has a sub-region 76 in the drive section 16 that tapers conically in the direction of the tool receptacle 22. The conically tapering sub-region 76 encloses an inclination angle 82 with the drive axis 30 of the drive unit 18. The inclination angle 82 is greater than 1.00° and less than 5.00°. In the present case, the inclination angle 82 is approximately 2.50°.

[0095] The housing unit 12 has a maximum diameter 88 of at most 50.00 mm in the conically tapering subregion 76 perpendicular to the drive shaft 30. In the present case, the maximum diameter 88 in the conically tapering subregion 76 is approximately 48.00 mm.

[0096] The conically tapering subregion 76 has an extension 92 of at least 44.00 mm along an inclined direction 90 relative to the drive shaft 30. In the present case, the extension 92 of the conically tapering subregion 76 has a length of exactly 50.00 mm.

[0097] The housing unit 12 has a straight end region 100 in the drive section 16, which is arranged below the conically tapering subregion 76 in the direction of the tool receptacle 22. The diameter 102 of the straight end region 100 corresponds to the minimum diameter 104 of the conically tapering subregion 76. In the present case, the diameter 102 of the straight end region 100 and the minimum diameter 104 of the conically tapering subregion 76 are each approximately 44.00 mm.

[0098] The drive section 16 of the housing unit 12 has a spherical cap-shaped surface section 84 on the side facing away from the tool receptacle 22 in the viewing direction along the drive axis 30 .

[0099] The housing unit 12 has a maximum height extension 142 in the drive section 16. The maximum height extension 142 extends from a lower edge 144 of the straight end region 100 to a highest point 146 of the spherical cap-shaped surface section 84. In the present case, the housing unit 12 has a maximum height extension 142 in the drive section 16 of 96.00 mm.

[0100] The height extension 148 of the conically tapering subregion 76 corresponds to at least 50.00% of the maximum height extension 142 of the housing unit 12 in the drive section 16. In the present case, the height extension 148 of the conically tapering subregion 76 has a length of 49.95 mm and corresponds to at least 52.00% of the maximum height extension 142 of the housing unit 12 in the drive section 16.

[0101] The maximum diameter 106 of tool 20 of power tool system 78 is greater than the maximum diameter 88 of conically tapering subregion 76 in drive section 16 of housing unit 12 . A user of power tool system 78 can therefore have a good view of tool 20 in a viewing direction parallel to drive axis 30 .

[0102] Figure 7 The viewing direction along the drive axis 30 is shown (see Figure 6 ) is a schematic top view of the housing unit 12 on the upper surface of the housing unit 12. The maximum diameter 86 of the spherical cap surface section 84 corresponds to the maximum diameter 88 of the conically tapering sub-region 76 (see Figure 6 ). Figure 6 It can be seen that the spherical cap-shaped surface section 84 and the conically tapering subregion 76 merge into one another.

[0103] The housing unit 12 has a minimum width extension 96 in the transition region 94 between the drive section 16 and the handle section 14. The minimum width extension 96 of the housing unit 12 in the transition region 94 between the drive section 16 and the handle section 14 corresponds to at most 80.00% of the maximum diameter 88 of the conically tapering subregion 76 (see Figure 6 ). In the present case, the smallest width extent 96 of the housing unit 12 in the transition region 94 between the drive section 16 and the handle section 14 corresponds to approximately 73.00% of the maximum diameter 88 of the conically tapering subsection 76 and therefore to approximately 35.00 mm.

[0104] The housing unit 12 has a maximum width extension 98 in the handle section 14 . The maximum width extension 98 of the housing unit 12 in the handle section 14 corresponds at most to the maximum diameter 88 of the conically tapering subregion 76 .

[0105] Figure 8A further schematic sectional view of the machine tool device 10 is shown. The machine tool device 10 has a cooling unit 108 for cooling the electronics unit 26. The cooling unit 108 comprises a main cooling element 110. The main cooling element 110 has a diameter of more than 3000 mm. 2 The cooling body surface 112 (see Fig. 9 In the assembled state of the cooling unit 108 , the main cooling body 110 is arranged on the underside 140 of the printed circuit board 54 of the electronic unit 26 (see Figure 4 )superior.

[0106] The cooling unit 108 has at least one auxiliary cooling body 114, which is connected to the main cooling body 110 via at least one connecting element (not shown). In the assembled state of the cooling unit 108, the main cooling body 110 and the auxiliary cooling body 114 are arranged on mutually opposite sides of the electronic unit 26. In the present case, the main cooling body 110 is arranged on the lower side 140 (see FIG. 14 ) of the circuit board 54 of the electronic unit 26. Figure 4 ), and the auxiliary cooling body 114 is arranged on the upper side 138 of the circuit board 54 of the electronic unit 26 opposite to the lower side 140 (see Figure 5 The auxiliary cooling body 114 can be configured as a heat pipe extending through the circuit board 54 of the electronic unit 26 via the connecting element connected to the main cooling body 110. The heat accumulated on the electronic unit 26 in the operating state of the machine tool device 10 is firstly released mainly through the main cooling body 110 and partially transported to the auxiliary cooling body 114 through the connecting element to further improve the cooling performance.

[0107] The ratio between the cooling body surface 112 of the main cooling body 110 and the cooling body surface (not shown) of the auxiliary cooling body 114 is at least 10 to 1. The cooling body surface of the auxiliary cooling body corresponds to at least 300 mm 2 , currently exactly 300mm 2 Therefore, the ratio between the cooling body surface 112 of the primary cooling body 110 and the cooling body surface of the auxiliary cooling body 114 is currently at least 11.66 to 1.

[0108] The battery unit 24 is designed to continuously supply energy to the drive unit 18 with a continuous current of at least 20 A and at most 45 A. In the present case, the battery unit 24 is designed to continuously supply energy to the drive unit 18 with a continuous current of at least 28 A. For this purpose, the battery unit 24 has a plurality of at least three battery cells 128. In the present case, the battery unit has exactly three battery cells 128.

[0109] exist Figure 81 shows the motor 122 of the drive unit 18. The motor 122 is designed as a direct drive. The battery unit 24 is designed for continuous operation of the motor for more than 3 minutes. In the present case, the motor 122 is designed as an electronically commutated electric motor.

[0110] The motor 122 has a diameter 124 of at least 30.00 mm and at most 48.00 mm perpendicular to the drive axis 30 of the drive unit 18. In the present case, the motor 122 has a diameter 124 of 38.00 mm perpendicular to the drive axis 30 of the drive unit 18.

[0111] The motor 122 has a maximum longitudinal extension 126 of at least 17.00 mm and at most 30.00 mm parallel to the drive axis 30 of the drive unit 18. In the present case, the motor 122 has a longitudinal extension 126 of 24.00 mm parallel to the drive axis 30 of the drive unit 18.

[0112] Fig. 9 The main cooling body 110 of the cooling unit 108 and the printed circuit board 54 of the electronics unit 26 are shown in a schematic perspective view.

[0113] As described above, the main cooling body 110 has a diameter greater than 3000 mm. 2 The cooling body surface 112 (see Fig. 9 ). Currently, the cooling body surface 112 of the main cooling body 110 is at least 3500 mm 2 Therefore, the cooling body surface 112 of the main cooling body 110 is larger than the main outer surface 74 of the circuit board 54 of the electronic unit 26 (see Figure 4 and Figure 5 ) is at least 10.00% larger. In the present case, the cooling body surface 112 of the main cooling body 110 is at least 29.00% larger than the main outer surface 74 of the circuit board 54 of the electronic unit 26 .

[0114] The ratio between the entire cooling surface (not shown) of the cooling unit 108, which currently consists of the cooling surface 112 of the main cooling element 110 and the cooling surface of the auxiliary cooling element 114, and the continuous current provided by the battery unit 24 for operating the drive unit 18 is at least 100 mm 2 Currently, the cooling unit 108 has at least 3.800mm 2 The entire cooling body surface and the battery unit 24 currently provides a continuous current of 28 A for operating the drive unit 18, so that the ratio between the continuous current and the entire cooling body surface is at least 135 mm 2 Than 1A.

Claims

1. A machine tool device (10), comprising: A housing unit (12) having at least one handle section (14) and at least one drive section (16), a drive unit (18) for driving a tool (20), a tool receiving portion (22) for connecting the tool (20) to the drive unit (18), a battery unit (24) for supplying energy to the drive unit (18), and an electronic unit (26) for controlling the drive unit (18), wherein: The drive unit (18) is arranged in the drive section (16), and the electronics unit (26) and the battery unit (24) are arranged in the handle section (14), characterized in that a main extension plane (28) of the electronics unit (26) intersects a drive axis (30) of the drive unit (18) on a side facing away from the tool receiving portion (22).

2. The machine tool device (10) according to claim 1, characterized in that A projection surface (34) of the battery cell (24) projected along an axis of movement (32) of the battery cell (24) has a contour (36) which at least substantially surrounds the electronics unit (26).

3. The machine tool device (10) according to claim 1 or 2, characterized in that A main extension plane (28) of the electronics unit (26) is angled relative to the drive axis (30) and the axis of movement (32) of the battery unit (24).

4. The machine tool device (10) according to claim 1, characterized in that The movement axis (32) of the battery unit (24) encloses an inclination angle (38) of at least 20.00° and at most 50.00°, in particular at least 21.00° and at most 46.00°, preferably at least 22.00° and at most 43.00°, preferably 23° with the main extension plane (28) of the electronics unit (26).

5. The machine tool device (10) according to claim 1, characterized in that An operating element (40) is arranged on the handle section (14) for operating the electronic unit (26), wherein the operating element (40) has a longest extension (42) extending perpendicularly to the drive axis (30), which corresponds to at least 25.00% of the longest extension (44) of the handle section (14) extending perpendicularly to the drive axis (30).

6. The machine tool (10) according to claim 5, characterized in that The electronic unit (26) is bounded by a bounding plane (46) extending parallel to the drive axis (30) and intersecting the battery unit (24) and / or the operating element (40).

7. The machine tool device (10) according to claim 5 or 6, characterized in that The electronic unit (26) is bounded by a further bounding plane (48) which extends parallel to the drive axis (30) and intersects the actuating element (40).

8. The machine tool device (10) according to any one of claims 5 to 7, characterized in that The handle section (14) has a circumference (50) of at least 130.00 mm and at most 140.00 mm, in particular 133.00 mm, in the region of the actuating element (40).

9. The machine tool device (10) according to any one of claims 5 to 8, characterized in that The cross section of the handle section (14) is designed as an oval and / or polygon with rounded corners in the area of ​​the operating element (14) and has a width (52) of at least 35.00 mm and at most 40.00 mm and a height (154) of at least 45.00 mm and at most 50.00 mm.

10. The machine tool device (10) according to claim 1, characterized in that The electronic unit (26) comprises a circuit board (54) having an outer contour (56) which deviates from a rectangle.

11. The machine tool device (10) according to claim 10, characterized in that The circuit board (54) has a rounded corner (58) having a radius of 1.00 mm to 4.00 mm.

12. The machine tool device (10) according to claim 10 or 11, characterized in that The printed circuit board (54) has a longitudinal extension (60) of at least 58.00 mm and at most 84.00 mm, in particular at least 66.00 mm and at most 76.00 mm, preferably 71.00 mm.

13. The machine tool device (10) according to claim 10, characterized in that The circuit board (54) has a maximum width extension of at least 28.00 mm and at most 45.00 mm, in particular at least 30.00 mm and at most 42.00 mm, preferably 39.00 mm.

14. The machine tool device (10) according to claim 10, characterized in that The printed circuit board (54) has two first side edges (64) of equal size, each of which has a first angle (68) of at least 13.00° and at most 33.00° relative to a longitudinal direction (66) of the printed circuit board (54).

15. The machine tool device (10) according to claim 10, characterized in that The printed circuit board (54) has two second side edges (70) of equal size, each of which has a second angle (72) of at least 5.0° and at most 25.0° relative to a longitudinal direction (66) of the printed circuit board (54).

16. The machine tool device (10) according to claim 10, characterized in that The circuit board (54) has a width of at least 1850 mm. 2 And up to 2700mm 2 The main outer surface (74) of the housing.

17. The machine tool device (10) according to the preamble of claim 1, in particular according to any one of the preceding claims, characterized in that The housing unit (12) has in the drive section (16) a sub-region (76) which tapers conically in the direction of the tool receptacle (22) and which encloses an inclination angle (82) of greater than 1.00° and less than 5.00° with a drive axis (30) of the drive unit (18).

18. The machine tool device (10) according to the preamble of claim 1, in particular according to any one of the preceding claims, characterized in that A cooling unit (108) for cooling the electronic unit (26) is provided, wherein the cooling unit has a main cooling body (110) having a diameter greater than 3000 mm. 2 The cooling body surface (112) is provided.

19. The machine tool device (10) according to claim 18, characterized in that The cooling unit (108) has at least one auxiliary cooling body (114), which is connected to the main cooling body (110) via at least one connecting element (116).

20. A machine tool (80) having a machine tool device (10) according to any one of the preceding claims.

21. A machine tool system (78) comprising a machine tool (80) according to claim 20 and at least one tool (20) for detachable connection to the tool holder (22).

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