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 a tool (20), a tool holder (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 electronic unit (26) and the battery unit (24) are arranged in the handle section (14). According to the invention, a main extension plane (28) of the electronic unit (26) intersects a drive axis (30) of the drive unit (18) on a side facing away from the tool holder (22).

Description

[0001] Description

[0002] Machine tool fixture, machine tool and machine tool system

[0003] State of the art

[0004] A machine tool device has already been proposed with a housing unit which has at least one handle section and at least one drive section, with a drive unit for driving a tool, with a tool holder for connecting the tool to the drive unit, with a battery unit for supplying energy to the drive unit and with 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.

[0005] Disclosure of the invention

[0006] The invention is based on a machine tool device with a housing unit which has at least one handle section and at least one drive section, with a drive unit for driving a tool, with a tool holder for connecting the tool to the drive unit, with a battery unit for supplying energy to the drive unit and with 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. It is proposed that a main extension plane of the electronics unit intersects a drive axis of the drive unit on a side facing away from the tool holder.

[0007] A “machine tool device” is to be understood as at least one part, in particular a subassembly, of a machine tool. The machine tool device can also form the entire machine tool. A “machine tool” is to be understood as a machine for machining workpieces. The machine tool is battery-operated and, in addition to battery operation, can also be designed for cable-connected operation. The machine tool is preferably designed as a portable machine tool, in particular as a hand-held power tool. A “portable machine tool” is to be understood as a machine tool that can be transported by an operator without a transport device. The portable machine tool preferably has a mass that is less than 40 kg, preferably less than 10 kg, and particularly preferably less than 5 kg.The portable power tool is preferably designed as a grinding machine, for example as an angle grinder, preferably as a burr grinder. Alternatively, however, the portable power tool could be designed as a cordless screwdriver and / or as a drill and / or as an impact drill. Furthermore, it is conceivable for the portable power tool to be designed as a jigsaw, a circular saw, a chainsaw, a sander, a planer, a garden power tool, a saber saw, or the like. However, it is also conceivable for the power tool to have another design that would appear appropriate to a person skilled in the art, such as a design as a garden tool, an electric planer, a chisel hammer, or a multifunctional machine.

[0008] The housing unit forms an outer housing of the machine tool device, wherein components of the machine tool device that are not part of the housing unit are arranged in and / or on the outer housing of the housing unit in an assembled state of the machine tool device. 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 encompassing, and holding the housing unit by a user of the machine tool. Preferably, a main extension direction of the handle section and a main extension direction of the drive section are aligned at an angle to one another, in particular at an angle other than 90.00°.

[0009] In this document, a “main extension direction” of an object can be understood as an axis that runs parallel to a longest edge of a smallest geometric cuboid that just completely encloses the object

[0010] A "drive unit" is understood to mean a unit that transfers kinetic energy to another, particularly mechanical, unit, in particular the tool holder, by means of energy conversion, in particular the conversion of electrical energy into mechanical energy. The other unit can be driven and, in particular, set in motion. The movement can, in particular, be a rotational movement, a linear movement, an oscillatory movement, or a combination of the aforementioned movements.

[0011] The drive axis of the drive unit preferably runs at least substantially parallel to a main extension direction of the drive unit. The drive axis can be a rotational axis about which the drive unit drives the tool in an operating state. Alternatively or additionally, the drive unit can be designed to move the tool in the operating state along the drive axis, in particular in a linear movement and / or an oscillating movement. The drive axis preferably runs parallel to and centered on a drive shaft and / or drive spindle of the drive unit. The drive axis preferably runs 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 alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of in particular less than 8.00°, advantageously less than 5.00° and particularly advantageously less than 2.00°.

[0012] The tool holder is preferably provided for a detachable connection of the tool to the drive unit, in particular to the drive shaft and / or drive spindle of the drive unit, and for this purpose comprises at least one connection element, preferably a form-fitting and / or frictional connection element. The tool holder can, without being limited thereto, be provided for example for producing a screw connection and / or a plug-in connection and / or a latching connection and / or a clamping connection and / or a clamping connection and / or another connection of the tool to the drive unit that appears appropriate 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 the machine tool and that, in at least one operating state, is at least partially in direct contact with at least one workpiece and / or machines the workpiece.

[0013] A “battery unit” is to be understood as a unit which is provided for supplying the drive unit with energy, in particular chemical and / or preferably electrical energy, and which can absorb, store and release this energy, at least temporarily. For this purpose, the battery unit comprises at least one energy storage device, in particular an accumulator, for example a lithium-ion accumulator and / or a lithium polymer accumulator and / or a nickel-metal hydride accumulator and / or the like. The accumulator is preferably designed as a battery cell. The battery unit can have a plurality of energy storage devices, in particular battery cells. The battery unit is preferably provided to provide a peak voltage of at least 12 V for supplying energy to the drive unit in an operating state.Alternatively, the battery unit could also be provided to provide a lower or higher peak voltage, for example of 14 V or 18 V, in the operating state. An “electronic unit” should be understood in particular to mean a unit with a processor unit and with a memory unit as well as with an operating program stored in the memory unit. The electronic unit is provided to control the drive unit. It is also conceivable that the electronic unit is provided to control and / or supply other components of the machine tool, such as display elements, interfaces or the like. 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 printed circuit board on which in particular the processor unit and / or the memory unit are arranged.

[0014] A “main extension plane” of a structural unit or element can be understood as a plane which is parallel to a largest side surface of the smallest possible imaginary cuboid which just completely encloses the structural unit or element and which in particular runs through the center of the cuboid.

[0015] In this document, numerals such as "first" and "second," which precede certain terms, serve only to distinguish between objects and / or to correlate objects with each other and do not imply a total number and / or ranking of the objects. In particular, a "second object" does not necessarily imply the presence of a "first object."

[0016] "Intended" should be understood as specifically configured, specifically designed, and / or specifically equipped. The term "intended" for an object to perform a specific function should preferably be understood as meaning that the object fulfills and / or performs this specific function in at least one application and / or operating state.

[0017] The inventive design allows for the provision of a machine tool device with advantageous structural properties. A particularly compact machine tool can be advantageously provided. At the same time, particularly advantageous ergonomics can be achieved, enabling particularly comfortable, simple, and intuitive operation of the machine tool.

[0018] It is further proposed that a projection surface of the battery unit projected along a movement axis of the battery unit has an outline which at least substantially surrounds the electronics unit. This advantageously makes it possible to achieve a particularly compact arrangement. A “movement axis” of the battery unit is to be understood as an axis along which at least a part, in particular at least one battery cell, of the battery unit, preferably the entire battery unit, can be inserted into the handle section of the housing unit and removed from the handle section of the housing unit. Preferably, the movement axis of the battery unit is angled relative to the drive axis of the drive unit. The movement axis of the battery unit is angled relative to the drive axis of the drive unit in particular at an angle of at least 60.00° and at most 120.00°.The movement axis of the battery unit is angled relative to the drive axis of the drive unit in particular at an angle of at least 60.00°, advantageously of at least 80.00°, particularly advantageously of at least 90.00°, preferably of at least 91.00°, preferably of at least 92.00° and particularly preferably of at least 93.00°. The movement axis of the battery unit is angled relative to the drive axis of the drive unit in particular at an angle of at most 120.00°, advantageously of at most 110.00°, particularly advantageously of at most 100.00°, preferably of at most 99.00°, preferably of at most 98.00° and particularly preferably of at most 97.00°. In a most preferred embodiment, the movement axis of the battery unit is angled relative to the drive axis of the drive unit at an angle of 95.00°.In this context, a "projection surface" of the battery unit is to be understood as a surface of a two-dimensional image of the battery unit, which results from a parallel projection of rays along and / or parallel to the movement axis of the battery unit. Preferably, the movement axis of the battery unit is at least substantially parallel to the main extension direction of the handle portion of the housing unit. Furthermore, it is proposed that the main extension plane of the electronics unit be angled with respect to the drive axis and a movement axis of the battery unit. Such a configuration can advantageously achieve a particularly compact design. The main extension plane of the electronics unit is angled with respect 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 angled relative to the drive axis in particular at an angle of at least 20.00°, advantageously at least 30.00°, particularly advantageously at least 40.00°, preferably at least 50.00°, preferably at least 60.00° and particularly preferably at least 70.00°. The main extension plane of the electronics unit is angled relative to the drive axis in particular at an angle of at most 80.00°, advantageously at most 77.00°, particularly advantageously at most 76.00°, preferably at most 75.00°, preferably at most 74.00° and particularly preferably at most 73.00°. In a most preferred embodiment, the main extension plane of the electronics unit is angled relative to the drive axis at an angle of exactly 72°.

[0019] Furthermore, it is proposed that a movement axis of the battery unit encloses an angle of inclination of at least 20.00° and at most 50.00°, in particular of at least 21.00° and at most 46.00°, preferably of at least 22.00° and at most 43.00°, preferably of 23° with the main extension plane of the electronics unit. If the movement axis 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, a particularly space-saving arrangement of the electronics unit in the housing unit can advantageously be enabled. Smaller angles of inclination of at least 20.00°, preferably of exactly 23°, can prove advantageous in particular for a space-saving arrangement of particularly large and therefore particularly powerful electronic units.

[0020] It is further proposed that the machine tool device have an actuating element arranged on the handle section for actuating the electronics unit, wherein the actuating element has a longest extension running perpendicular to the drive axis, which corresponds to at least 25.00% of a longest extension of the handle section running perpendicular to the drive axis. Such a configuration can advantageously improve ergonomics and further increase operating comfort. Simple and intuitive actuation of the electronics unit can advantageously be enabled. In particular, actuation of the electronics unit with several fingers simultaneously is possible if the actuating element has a longest extension running perpendicular to the drive axis, which corresponds to at least 25.00% of a longest extension of the handle section running perpendicular to the drive axis.The longest extension of the actuating element running perpendicular to the drive axis corresponds in particular 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 running perpendicular to the drive axis.

[0021] Furthermore, it is proposed that the electronics unit be delimited by a boundary plane running parallel to the drive axis, which intersects the battery unit and / or the actuating element. This advantageously further improves compactness. Preferably, the boundary plane intersects both the battery unit and the actuating element. In this context, a "boundary plane" is understood to mean an imaginary plane running parallel to the drive axis, which does not intersect with the electronics unit.

[0022] It is also proposed that the electronics unit be delimited by a further delimiting plane running parallel to the drive axis and intersecting the actuating element. Such a configuration can advantageously enable a particularly compact design of the machine tool device. In particular, an optimal arrangement of the electronics unit with respect to the actuating element can be achieved if the electronics unit is delimited by the delimiting plane running parallel to the drive axis and by the further delimiting plane running parallel to the drive axis. It is also proposed that the handle section in the region of the actuating element has a circumference of at least 130.00 mm and at most 140.00 mm. Such a configuration can advantageously further improve ergonomics.In particular, easy gripping of the handle section in the area of ​​the actuating element and thus easy actuation of the actuating element can be enabled if the handle section in the area of ​​the actuating element has a circumference of at least 130.00 mm and at most 140.00 mm. Preferably, the handle section in the area of ​​the actuating element has a circumference of at least 131.00 mm, preferably of at least 132.00 mm and particularly preferably of 133.00 mm. In the area of ​​the actuating element, the handle section in particular has a circumference of at most 139.00 mm, advantageously of at most 138.00 mm, particularly advantageously of at most 137.00 mm, preferably of at most 136.00 mm, preferably of at most 135.00 mm and particularly preferably of at most 134.00 mm.

[0023] It is further proposed that a cross-section of the handle portion in the region of the actuating element be oval and / or polygonal with rounded corners and have a width of at least 35.00 mm and a maximum of 40.00 mm and a height of at least 45.00 mm and a maximum of 50.00 mm. Such a configuration can advantageously further improve ergonomics. The oval and / or polygonal cross-section of the handle portion in the region of the actuating element also advantageously results in improved, in particular optimal, control for a user of the machine tool device, since the oval and / or polygonal housing shape achieves a positive fit against twisting of the handle portion. The cross-section of the handle portion in the region of the actuating element preferably has a width of at least 36.00 mm and a maximum of 39.00 mm, more preferably a width of at least 36.50 mm and a maximum of 38.00 mm.The cross-section of the handle section in the region of the actuating element preferably has a height of at least 46.00 mm and at most 49.00 mm, preferably a height of at least 46.50 mm and at most 48.00 mm. It is also proposed that the electronics unit comprise a printed circuit board with an outer contour that is different from a rectangle. This advantageously makes it possible to achieve an improved arrangement of the electronics unit, whereby a particularly compact machine tool device can further advantageously be provided. In particular, a very compact outer contour of the housing unit in the handle section can be enabled if the electronics unit arranged within the handle section has a printed circuit board with an outer contour that is different from a rectangle.The outer contour of the circuit board that differs from a rectangle can, for example, be triangular, trapezoidal, or polygonal with more than four corners, without being limited thereto. The outer contour of the circuit board that differs from a rectangle could 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 differs from a rectangle is symmetrical, in particular mirror-symmetrical, with respect to at least one axis of symmetry, in particular a longitudinal center axis of the circuit board.For example, the outer contour of the circuit board, which differs from a rectangle, could 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 result from a combination 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 a main extension direction of the circuit board. A symmetrical design of the circuit board can advantageously enable 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 area of ​​the printed circuit board, whereby particularly good ergonomics can be achieved, in particular for both right-handed and left-handed people.

[0024] Furthermore, it is proposed that the circuit board have rounded corners with a radius of 1.00 mm to 4.00 mm. Such a configuration can advantageously enable a compactness of the circuit board and, accordingly, a compactness of the housing unit in a partial section of the handle area surrounding the electronics unit. In particular, the outer contour of the circuit board can be adapted particularly well to the preferably oval and / or polygonal cross-section of the handle section in the area of ​​the actuating element. The circuit board has, in particular, rounded corners with a radius of 1.25 mm to 3.75 mm, preferably with a radius of 1.50 mm to 3.50 mm.

[0025] Furthermore, it is proposed that the printed circuit board has a longitudinal extent of at least 58.00 mm and at most 84.00 mm. This advantageously allows compactness to be further improved. The longitudinal extent 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, more preferably at least 68.00 mm and particularly preferably at least 70.00 mm. The longitudinal extent 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, preferably at most 77.00 mm and particularly preferably at most 75.00 mm. In a most preferred embodiment, the longitudinal extent of the printed circuit board is exactly 74.00 mm.

[0026] It is further proposed that the printed circuit board have a greatest width of at least 28.00 mm and at most 45.00 mm. This advantageously allows compactness to be further improved. The greatest width of the printed circuit board is advantageously at least 29.00 mm, particularly advantageously at least 30.00 mm, preferably at least 31.00 mm, more preferably at least 32.00 mm and particularly preferably at least 33.00 mm. The greatest width of the printed circuit board is advantageously at most 44.00 mm, particularly advantageously at most 43.00 mm, preferably at most 42.00 mm, preferably at most 41.00 mm and particularly preferably at most 40.00 mm. In a most preferred embodiment, the greatest width of the printed circuit board is exactly 39.00 mm.It is also proposed that the circuit board have two equally sized first side edges, each having a first angle of at least 13.0° and at most 33.0° with respect to a longitudinal direction of the circuit board. Such a configuration advantageously makes it possible to achieve a particularly compact outer contour of the circuit board, which in turn advantageously makes it possible to achieve a particularly compact outer contour of the housing unit in the partial section of the handle area surrounding the electronics unit. The two equally sized first side edges each have, in particular, a first angle of at least 14.0°, advantageously of at least 15.0°, particularly advantageously of at least 16.0°, preferably of at least 17.0°, more preferably of at least 18.0° and particularly preferably of at least 19.0° with respect to the longitudinal direction of the circuit board.The two equally sized first side edges each have, in particular, a first angle of at most 32.0°, advantageously of at most 31.0°, particularly advantageously of at most 30.0°, preferably of at most 29.0°, preferably of at most 28.0°, and particularly preferably of at most 27.0°, with respect to the longitudinal direction of the circuit board. In a most preferred embodiment, the two equally sized first side edges each have, with respect to the longitudinal direction of the circuit board, a first angle of at least 20.0°, 0.0°, and at most 25.0°, preferably a first angle of exactly 23.0°.

[0027] Furthermore, it is proposed that the printed circuit board have two equally sized second side edges, which each have a second angle of at least 5.0° and at most 25.0° with respect to a longitudinal direction of the printed circuit board. This advantageously makes it possible to make the outer contour of the printed circuit board even more compact, which further advantageously also results in an even more compact outer contour of the housing unit in the partial section of the handle area surrounding the electronics unit. The two equally sized second side edges each have, in particular, a second angle of at least 6.0°, advantageously of at least 7.0°, particularly advantageously of at least 8.0°, preferably of at least 9.0°, more preferably of at least 10.0° and particularly preferably of at least 11.0° with respect to the longitudinal direction of the printed circuit board.The two equally sized first side edges each have, in particular, a second angle of at most 24.0°, advantageously of at most 23.0°, particularly advantageously of at most 22.0°, preferably of at most 21.0°, preferably of at most 20.0°, and particularly preferably of at most 19.0°, with respect to the longitudinal direction of the circuit board. In a most preferred embodiment, the two equally sized first side edges each have an angle of at least 12.0° and at most 18.0°, preferably a second angle of exactly 15.0°, with respect to the longitudinal direction of the circuit board.

[0028] Furthermore, it is proposed that the printed circuit board has a main external surface of at least 1850 mm 2 and a maximum of 2700 mm 2Such a design advantageously provides a particularly compact yet powerful electronic unit. The circuit board has, in particular, a main outer surface of at least 1900 mm 2 , advantageously of at least 1950 mm 2 , particularly advantageous from at least 2000 mm 2 , preferably at least 2050 mm 2 and particularly preferably of at least 2100 mm 2 In particular, the printed circuit board has a main external surface of no more than 2650 mm 2 , advantageously of a maximum of 2600 mm 2 , particularly advantageous from a maximum of 2550 mm 2 , preferably not more than 2500 mm 2 and particularly preferably not more than 2450 mm 2A "main outer surface" is understood to mean a usable outer surface of the printed circuit board on which, in an assembled state of the electronics unit, the electrical and / or electronic components of the electronics unit, for example semiconductor switching elements and capacitors and the like, are placed. The main outer surface of the printed circuit board comprises at least the two largest surface sides, in particular a top side and a bottom side, of the printed circuit board. Preferably, the angle of inclination between the movement axis of the battery unit and the main extension plane of the electronics unit is adapted to the size of the main outer surface of the printed circuit board. For example, the angle of inclination between the movement axis of the battery unit and the main extension plane of the electronics unit is, in the case of a main outer surface of the printed circuit board of 2200 mm 2 preferably 30.00°, and in case of a main outer surface of the PCB of 1850 mm 2The angle of inclination between the movement axis of the battery unit and the main extension plane of the electronics unit is preferably 40.00°. In the case of a particularly large main outer surface of the circuit board of 2700 mm 2 The angle of inclination between the movement axis of the battery unit and the main extension plane of the electronics unit is preferably 22.00°. If the angle of inclination between the movement axis of the battery unit and the main extension plane of the electronics unit is adapted to the size of the main outer surface of the circuit board, a machine tool device can advantageously be provided with the smallest possible handle section in the area of ​​the handle section of the housing unit while simultaneously maintaining the largest possible main outer surface of the circuit board. A particularly ergonomic and at the same time particularly powerful machine tool device can therefore be provided.

[0029] In a further aspect of the invention, which can be considered both independently and in combination with the aforementioned aspects of the invention, it is proposed that the machine tool device comprises a cooling unit for cooling the electronics unit, which comprises a main heat sink with a heat sink surface of more than 3000 mm 2By means of such a configuration, a machine tool device with advantageous properties in terms of construction can be provided. In particular, a particularly compact machine tool device with, at the same time, advantageously high cooling performance can be provided. The cooling unit is provided for cooling the electronics 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 heat sink of the cooling unit has, in particular, a heat sink surface of at least 3100 mm 2 , advantageously of at least 3200 mm 2 , particularly advantageous from at least 3300 mm 2 , preferably at least 3400 mm 2 , preferably at least 3500 mm 2 and particularly preferably of at least 3600 mm 2The heat sink surface of the main heat sink is in particular 10.00%, advantageously at least 20.00%, particularly advantageously at least 30.00%, preferably at least 40.00%, preferably at least 50.00%, and particularly preferably at least 60.00% larger than the main outer surface of the circuit board of the electronics unit. The housing unit preferably comprises at least one air inlet, preferably a plurality of air inlets, and at least one air outlet, preferably a plurality of air outlets. The cooling unit preferably comprises at least one fan, which is provided to suck in cooling air via the at least one air inlet of the housing unit, to transport the cooling air into areas to be cooled within the housing unit, and in particular to guide it past the main heat sink and / or a secondary heat sink of the cooling unit and to discharge it via the at least one air outlet of the housing unit.

[0030] It is further proposed that the cooling unit has at least one secondary heat sink which is connected to the main heat sink via at least one connecting element. Such a configuration can advantageously further improve efficiency. Preferably, in an assembled state of the machine tool device, the main heat sink is arranged at least partially on a first side of the printed circuit board of the electronics unit, preferably on an underside of the printed circuit board which, in the assembled state, faces away from the battery unit. In the assembled state of the machine tool device, the secondary heat sink is preferably arranged at least partially on a second side of the printed circuit board of the electronics unit opposite the first side, preferably on an upper side of the printed circuit board facing the battery unit.The connecting element preferably extends from the main heat sink to the secondary heat sink, starting from the first side of the circuit board, in particular from the underside 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 to the top side of the circuit board facing the battery unit, in particular through a through-opening in the circuit board or alternatively along a side edge of the circuit board. The connecting element can, for example, be designed as a heat pipe and / or as a copper riser and / or the like, without being limited thereto. The secondary heat sink of the cooling unit in particular has a cooling surface of at least 300 mm. 2 , advantageously of at least 310 mm 2 , particularly advantageous of at least 320 mm 2 , preferably at least 330 mm 2 , preferably at least 340 mm2 and particularly preferably of at least 350 mm 2 In addition to the secondary heat sink, the cooling unit can have at least one further secondary heat sink. It is also proposed that a ratio between the heat sink surface of the main heat sink and a heat sink surface of the secondary heat sink be at least 10.00 to 1.00. Such a configuration makes it possible to provide a particularly compact cooling unit with, at the same time, advantageously high cooling performance. In particular, the ratio between the heat sink surface of the main heat sink and the heat sink surface of the secondary heat sink 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 11.00 to 1, more preferably at least 11.25 to 1, and particularly preferably at least 11.50 to 1.

[0031] Furthermore, it is proposed that the battery unit is designed to continuously supply energy to the drive unit with a continuous current of at least 20 A and at most 45 A. Such a configuration can advantageously enable a particularly high level of comfort. The battery unit is designed in particular to continuously supply 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, preferably at least 26 A, preferably at least 27 A and particularly preferably at least 28 A. The battery unit is designed in particular to continuously supply 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, preferably at most 37 A, preferably at most 35 A and particularly preferably at most 33 A.In a most preferred embodiment, the battery unit is designed to continuously supply energy to the drive unit with a continuous current of 28 A.

[0032] In addition, it is proposed that a ratio between a total heat sink surface of the cooling unit and a continuous current, which the battery unit provides for operating the drive unit, be at least 100 mm 2 to 1 A. Such a design enables particularly reliable and safe continuous operation. In particular, sufficient cooling performance can be provided if the ratio between the total heat sink surface of the cooling unit and the continuous current provided by the battery unit to operate the drive unit is at least 100 mm 2to 1 A. In particular, the ratio between the total heat sink surface of the cooling unit and the continuous current provided by the battery unit to operate the drive unit is at least 105 mm 2 to 1 A, preferably at least 110 mm 2 to 1 A, particularly advantageous at least 115 mm 2 to 1 A, preferably at least 120 mm 2 to 1 A, preferably at least 125 mm 2 to 1 A and particularly preferably at least 130 mm 2 to 1 A. In this context, a “total 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 applicable, additionally the heat sink surface(s) of the secondary heat sink or secondary heat sinks.

[0033] It is further proposed that the drive unit comprise a motor configured as a direct drive, and that the battery unit be designed for continuous operation of the motor for at least 3 minutes. This advantageously enables a particularly compact design while simultaneously advantageously providing a long continuous operating time. A "direct drive" is understood here to mean that the motor is intended to drive the drive shaft and / or the drive spindle of the drive unit, to which the tool is connected via the tool holder, directly, in particular without an interposed gear and / or clutch.The battery unit is designed in particular for continuous operation of the motor of at least 3.25 minutes, advantageously of at least 3.50 minutes, particularly advantageously of at least 3.75 minutes, preferably of at least 4.00 minutes, preferably of at least 4.25 minutes and particularly preferably of at least 4.50 minutes.

[0034] It is also proposed that the motor has a diameter of at least 30.00 mm and at most 48.00 mm perpendicular to a drive axis of the drive unit. Such a configuration can advantageously provide a particularly compact machine tool device. The motor has, perpendicular to the drive axis of the drive unit, in particular a diameter of at least 31.00 mm, advantageously of at least 32.00 mm, particularly advantageously of at least 33.00 mm, preferably of at least 34.00 mm, more preferably of at least 35.00 mm and particularly preferably of at least 36.00 mm. The motor has, perpendicular to the drive axis of the drive unit, in particular a diameter of at most 45.00 mm, advantageously of at most 44.00 mm, particularly advantageously of at most 43.00 mm, preferably of at most 42.00 mm, preferably of at most 41.00 mm and particularly preferably of at most 40.00 mm.In a most preferred embodiment, the motor has a diameter of 38.00 mm perpendicular to the drive axis of the drive unit.

[0035] Furthermore, it is proposed that the motor has a maximum length parallel to a drive axis of the drive unit of at least 17.00 mm and at most 30.00 mm. This advantageously makes it possible to provide a particularly compact machine tool device. The motor has, in particular, a maximum length parallel to the drive axis of the drive unit of at least 18.00 mm, advantageously of at least 19.00 mm, particularly advantageously of at least 20.00 mm, preferably of at least 21.00 mm, more preferably of at least 22.00 mm and particularly preferably of at least 23.00 mm. The motor has, in particular, a maximum length parallel to the drive axis of the drive unit of at most 29.00 mm, advantageously of at most 28.00 mm, preferably of at most 27.00 mm, preferably of at most 26.00 mm and particularly preferably of at most 25.00 mm.In a most preferred embodiment, the motor has a maximum length of 25.00 mm parallel to the drive axis of the drive unit.

[0036] The motor of the drive unit could, for example, be a brushed DC motor. In a particularly preferred embodiment, however, it is proposed that the motor be designed as an electronically commutated electric motor. This advantageously makes it possible to provide a particularly compact and efficient motor with high efficiency, and thus a particularly efficient machine tool device. The electronics unit is preferably provided for commutating the motor.

[0037] It is further proposed that the battery unit comprise a plurality of at least three battery cells. This advantageously allows for high battery performance. The battery unit may comprise a plurality of battery cells corresponding to a multiple of three, preferably twice three.

[0038] In a further aspect of the invention, which can be considered both independently and in combination with the aforementioned aspects of the invention, it is proposed that the housing unit, in the drive section, have a partial region that tapers conically in the direction of the tool holder and that, with a drive axis of the drive unit, encloses an angle of inclination of greater than 1.00° and less than 5.00°. Such a configuration of the machine tool device can advantageously achieve a particularly high level of operating comfort.If the housing unit has a partial area in the drive section which tapers conically in the direction of the tool holder and which encloses an angle of inclination of greater than 1.00° and less than 5.00° with a drive axis of the drive unit, this can advantageously enable a particularly good view of a tool connected to the tool holder and / or of a workpiece to be machined using the tool, which can further advantageously increase operating comfort and operating safety. The partial area which tapers conically in the direction of the tool holder in the drive section of the housing unit advantageously encloses an angle of inclination of greater than 1.25°, particularly advantageously greater than 1.50°, preferably greater than 1.75°, more preferably greater than 2.00° and particularly preferably greater than 2.25° with the drive axis of the drive unit.The partial area tapering conically in the drive section of the housing unit in the direction of the tool holder encloses, with the drive axis of the drive unit, in particular 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°, preferably less than 3.00°, and particularly preferably less than 2.75°. In a most preferred embodiment, the partial area tapering conically in the drive section of the housing unit in the direction of the tool holder encloses an angle of inclination of exactly 2.50° with the drive axis of the drive unit.

[0039] It is further proposed that the drive section, viewed along the drive axis, has a spherical cap-shaped surface section on a side facing away from the tool holder, the maximum diameter of which surface section corresponds to a maximum diameter of the conically tapered partial area. This can advantageously further increase operating comfort. It can advantageously enable a particularly good view of a workpiece to be machined. “Spherical cap-shaped” is to be understood here as the shape of a lateral surface of a spherical cap. A “spherical cap” is to be understood here as a geometric body which describes a part of a spherical body which is obtained by intersecting the spherical body with a plane and which is alternatively also referred to as a spherical segment and / or a spherical section and / or a spherical cap and / or a spherical segment.The machine tool device can have a display unit for displaying operating information, for example a current charge level of the battery unit and / or a current temperature of the battery unit and / or the drive unit and / or the electronics unit and / or a current speed and / or a current torque of the drive unit and / or the like. The display unit preferably comprises at least one display element, for example a display and / or at least one LED and / or the like, which is arranged in the spherical cap-shaped surface section of the housing unit. This can advantageously further improve operating comfort. Operating information can advantageously be displayed to a user of the machine tool in a clearly visible manner in the spherical cap-shaped surface section during machining of workpieces.

[0040] Furthermore, it is proposed that the spherical cap-shaped surface section and the conically tapered portion merge into one another. Such a configuration advantageously provides a machine tool device with a particularly compact housing unit, which simultaneously offers advantageous properties with regard to operating comfort and operating safety.The fact that the spherical cap-shaped surface section and the conically tapered partial area “merge into one another” is to be understood as meaning that the spherical cap-shaped surface section has a diameter that increases when viewed along the drive axis in the direction of the tool holder and ends in the region of its maximum diameter, wherein the conically tapered partial area immediately 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 tapered partial area decreases when viewed along the drive axis in the direction of the tool holder, starting from the end down to a minimum diameter.

[0041] Furthermore, it is proposed that the housing unit have a maximum diameter of 50.00 mm at most in the conically tapered portion perpendicular to the drive axis. Such a configuration can advantageously enable a particularly good view of a workpiece to be machined. In the conically tapered portion perpendicular to the drive axis, the housing unit has, in particular, a diameter of 49.75 mm at most, advantageously 49.50 mm at most, particularly advantageously 49.25 mm at most, preferably 49.00 mm at most, preferably 48.75 mm at most, and particularly preferably 48.50 mm at most.

[0042] Furthermore, it is proposed that the conically tapered portion extend along a direction of inclination relative to the drive axis by at least 44.00 mm. This advantageously enables an improved view of a workpiece to be machined. The conically tapered portion extends along the direction of inclination relative to the drive axis, in particular by at least 45.00 mm, advantageously by at least 46.00 mm, particularly advantageously by at least 47.00 mm, preferably by at least 48.00 mm, preferably by at least 49.00 mm, and particularly preferably by at least 50.00 mm.The conically tapered partial region has, along the direction of inclination to the drive axis, in particular an extension of at most 56.00 mm, advantageously of at most 55.00 mm, particularly advantageously of at most 54.00 mm, preferably of at most 53.00 mm, preferably of at most 52.00 mm and particularly preferably of at most 51.00 mm, whereby a compactness of the machine tool device can be advantageously ensured.

[0043] It is further proposed that the housing unit have a smallest width in a transition area between the drive section and the handle section, which corresponds to a maximum of 80.0% of the maximum diameter of the conically tapered section. Such a design can advantageously further improve ergonomics.The housing unit has a smallest width extension in the transition area between the drive section and the handle section, which corresponds in particular to a maximum of 79.00%, advantageously a maximum of 78.00%, particularly advantageously a maximum of 77.00%, preferably a maximum of 76.00%, preferably a maximum of 75.00% and particularly preferably a maximum of 74.00% of the maximum diameter of the conically tapered partial area. The housing unit preferably has a constriction in the transition area, which extends vertically in the viewing direction along an entire circumferential direction and which has an outer contour whose shape corresponds at least substantially to the shape of an ellipse, wherein the smallest width extension corresponds in particular to a smallest diameter of the ellipse.

[0044] It is also proposed that the housing unit has a greatest width in the handle section which corresponds at most to a maximum diameter of the conically tapered partial region. This can advantageously further improve ergonomics. Preferably, the housing unit has at least one further conically tapered partial region in the handle section which extends from a region of the maximum width of the handle section in the direction of the drive section to the transition region with the smallest width of the housing unit. This can advantageously further improve ergonomics. In particular, the further conically tapered partial region of the housing unit encloses a further angle of inclination of greater than 1.00° and less than 10.00° with the movement axis of the battery unit.Advantageously, the further conically tapered partial region encloses a further angle of inclination of greater than 1.50°, particularly advantageously greater than 2.00°, preferably greater than 2.50°, preferably greater than 3.00° and particularly preferably greater than 3.50° with the movement axis of the battery unit. The further conically tapered partial region encloses a further angle of inclination of less than 9.50°, advantageously less than 9.00°, particularly advantageously less than 8.50°, preferably less than 8.00°, preferably less than 7.50° and particularly preferably less than 7.00° with the movement axis of the battery unit. Furthermore, it is proposed that the housing unit has a straight end region in the drive section which is arranged in the direction of the tool holder below the conically tapered partial region and whose diameter corresponds to a minimum diameter of the conically tapered partial region.Such a configuration advantageously allows a particularly high degree of flexibility to be achieved in the design of the machine tool device. The housing unit has a maximum vertical extension in the drive section that runs parallel to the drive axis and extends from a lower edge of the straight end region to a highest point of the spherical cap-shaped surface section. A vertical extension running parallel to the drive axis preferably corresponds to at least 50.00%, preferably at least 51.00%, particularly preferably at least 52.00% of the maximum vertical extension of the housing unit in the drive section.

[0045] The invention further relates to a machine tool with a machine tool device according to one of the previously described embodiments. Such a machine tool is characterized, among other things, by its compact dimensions and its advantageous ergonomics, which are achieved by the inventive design of the machine tool device.

[0046] The invention also relates to a machine tool system comprising the previously described machine tool and at least one tool for detachable connection to the tool holder. Such a machine tool system is characterized by the advantageous properties of the machine tool, which are achieved by the inventive design of the machine tool device, in combination with the tool.

[0047] It is also proposed that a maximum diameter of the tool is greater than a maximum diameter of the conically tapered partial area in the drive section of the housing unit. Such a configuration can enable particularly convenient and safe operation of the machine tool system. In particular, a clear view of at least a partial area of ​​the tool and thus particularly convenient and safe machining of workpieces by means of the machine tool system can be enabled if the maximum diameter of the tool is greater than the maximum diameter of the conically tapered partial area in the drive section of the housing unit. The maximum diameter of the tool is in particular at least 1.00%, advantageously at least

[0048] 1 .50%, particularly advantageously by at least 2.00%, preferably by at least

[0049] 2.50%, preferably by at least 3.00% and particularly preferably by at least

[0050] 3.50% larger than the maximum diameter of the tapered portion in the drive section of the housing unit. The tool can, for example, have a maximum diameter of at least 50.00 mm.

[0051] The machine tool device according to the invention, as well as the machine tool system according to the invention and the machine tool according to the invention, are not intended to be limited to the application and embodiment 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 can have a number of individual elements, components, and units that differs from the number stated herein in order to fulfill a functionality described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily.

[0052] drawing

[0053] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will conveniently consider the features individually and combine them into useful further combinations. They show:

[0054] Fig. 1 shows a machine tool with a machine tool device in a schematic side view,

[0055] Fig. 2 shows a machine tool system with the machine tool and with a tool for detachable connection to a tool holder of the machine tool device in a schematic sectional view,

[0056] Fig. 3 is a schematic sectional view through a handle section of a housing unit of the machine tool device,

[0057] Fig. 4 is a schematic perspective view of a battery unit and an electronic unit of the machine tool device in the direction of view along a movement axis of the battery unit,

[0058] Fig. 5 a circuit board of the electronic unit in a schematic plan view,

[0059] Fig. 6 the machine tool system with the machine tool and the tool in a further schematic side view,

[0060] Fig. 7 the machine tool with the machine tool device in a schematic plan view,

[0061] Fig. 8 the machine tool with the machine tool device in a further schematic sectional view and

[0062] Fig. 9 shows a main heat sink of a cooling unit of the machine tool device for cooling the electronics unit in a schematic perspective view.

[0063] Description of the embodiment

[0064] Figure 1 shows a machine tool 80 in a schematic perspective view. In the present exemplary embodiment, the machine tool 80 is designed as a burr grinder. The machine tool 80 comprises a machine tool device 10. The machine tool device 10 comprises a housing unit 12, which has at least one handle section 14 and at least one drive section 16. The machine tool device 10 has a drive unit 18 for driving a tool 20 (see Figure 2). The machine tool device 10 has a tool holder 22 for connecting the tool 20 to the drive unit 18.

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

[0066] Figure 2 shows the machine tool system 78 in a schematic sectional view with the machine tool 80 comprising the machine tool device 10 and the tool 20, wherein the tool 20 is detachably connected to the tool holder 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 can comprise further tools (not shown) for connection to the tool holder 22.

[0067] Figure 2 shows the drive unit 18 of the 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 holder 22 is connected to the drive spindle 116. In an operating state of the machine tool device 10, the motor 122 generates a rotary movement of the drive spindle 116 together with the tool holder 22 and the tool 20 connected to the tool holder 22 about a drive axis 30 of the drive unit 18. In the present case, the drive axis 30 is aligned parallel to and centered on the drive spindle 116.

[0068] A main extension direction 118 of the drive section 14 of the housing unit 12 runs parallel to the drive axis 30 of the drive unit 18. The machine tool device 10 further comprises a battery unit 24 for supplying energy to the drive unit 18.

[0069] The machine tool device 10 also includes 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 battery unit 24 are arranged in the handle section 14.

[0070] A main extension plane 28 of the electronics unit 26 intersects the drive axis 30 of the drive unit 18 on a side of the drive unit 18 facing away from the tool holder 22.

[0071] The main extension plane 28 of the electronics unit 26 is angled relative to the drive axis 30 and a movement axis 32 of the battery unit 24. Along the movement axis 32, the battery unit 24 can be inserted into the handle section 14 of the housing unit 12 and pulled out of the handle section 14 of the housing unit 12.

[0072] The main extension plane 28 of the electronics unit 26 is angled at an angle 152 relative to the drive axis 30 of the drive unit 18, which in this case is 55.00°.

[0073] 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 of at least 21.00° and at most 46.00°, preferably of at least 22.00° and at most 43.00°, preferably of 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 with the main extension plane 28 of the electronics unit 26 is 23.00°.

[0074] The movement axis 32 of the battery unit 24 is angled at an angle of 150° of at least 60.00° and at most 120.00° relative to the drive axis 30 of the drive unit 18. In the present case, the movement axis 32 of the battery unit 24 is angled at an angle of 150° of 95.00° relative to the drive axis 30 of the drive unit 18.

[0075] A main extension direction 120 of the handle portion 14 of the housing unit 12 runs parallel to the movement axis 32 of the battery unit 24.

[0076] The machine tool device 10 has an actuating element 40 arranged on the handle portion 14 for actuating the electronics unit 26. The actuating element 40 has a longest extension 42 running perpendicular to the drive axis 30. The longest extension 42 of the actuating element 40 corresponds to at least 25.00% of a longest extension 44 of the handle portion 14 running perpendicular to the drive axis 30. In the present case, the longest extension 42 of the actuating element 40 corresponds to approximately 60.00% of the longest extension 44 of the handle portion 14. The longest extension 44 of the handle portion 14 is, for example, approximately 156 mm, and the longest extension 42 of the actuating element 40 is approximately 95 mm.

[0077] The electronics unit 26 is delimited by a boundary plane 46 running parallel to the drive axis 30. The boundary plane 46 intersects the battery unit 24 and / or the actuating element 40. In the present case, the boundary plane 46 intersects the battery unit 24 and the actuating element 40.

[0078] The electronics unit 26 is also delimited by a further boundary plane 48 running parallel to the drive axis 30, which intersects the actuating element 40. The boundary plane 46 and the further boundary plane 48 are each imaginary planes that do not intersect the electronics unit 26.

[0079] Figure 3 shows a schematic sectional view of the housing unit 12 with a cross-section through the handle section 14 in the region of the actuating element 40. In the region of the actuating element 40, the cross-section of the handle section 14 is oval and / or polygonal with rounded corners. In the present case, the cross-section of the handle section 14 in the region of the actuating element 40 is oval. 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 actuating 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 actuating element 40. In the present case, the height 154 of the cross-section is 47.00 mm.

[0080] The handle portion 14 has a circumference 50 of at least 130 mm and at most 140 mm in the region of the actuating element 40. In this case, the circumference 50 of the handle portion 14 in the region of the actuating element 40 is 133.00 mm.

[0081] Figure 4 shows the battery unit 24 and the electronics unit 26 in a schematic perspective view in the direction of view along the movement axis 32 (see Figure 2) of the battery unit 24.

[0082] A projection surface 34 of the battery unit 24, projected along the movement axis 32 of the battery unit 24, has a contour 36 that at least substantially surrounds the electronics unit 26. In the present case, the contour 36 of the projection surface 34 of the battery unit 24 completely surrounds the electronics unit 26.

[0083] The electronics unit 26 comprises a printed circuit board 54. Figure 4 shows an underside 140 of the printed circuit board 54.

[0084] Figure 5 shows a schematic plan view of the circuit board 54 onto a top side 138. The circuit board 54 has an outer contour 56 that is different from a rectangle. In this case, the outer contour 56 of the circuit board 54 is octagonal.

[0085] The printed circuit board 54 has a longitudinal extent 60 of at least 58.00 mm and at most 84.00 mm. In the present case, the longitudinal extent 60 of the printed circuit board 54 is 74.00 mm. The printed circuit board 54 has a greatest width extent 62 of at least

[0086] 28.00 mm and a maximum of 45.00 mm. In this case, the largest width dimension 62 of the circuit board 54 is 39.00 mm.

[0087] The printed circuit board 54 has two equally sized first side edges 64. The first side edges 64 each have a first angle 68 of at least 13.00° and at most 33.00° with respect to a longitudinal direction 66 of the printed circuit board 54. In the present case, the first angle 68 of the first side edges 64 with respect to the longitudinal direction 66 is 23.00°.

[0088] The circuit board 54 further has two equally sized second side edges 70. The second side edges 70 each have a second angle 72 of at least 5.00° and at most 25.00° with respect to the longitudinal direction 66 of the circuit board. In this case, the second angle 72 of the second side edges 70 is 15.00°.

[0089] The circuit board 54 also has two equally sized central edges 130 which run parallel to the longitudinal direction 66. Each of the central 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 aligned perpendicular to the longitudinal direction 66. In the present case, the lower edge 132 and the upper edge 134 are of equal size. The lower edge 132 connects the two first side edges 64 to one another. The upper edge 134 connects the two second side edges 70 to one another. In the present case, the circuit board 54 is mirror-symmetrical to its longitudinal central axis 136, which runs parallel to the longitudinal direction 66.

[0090] The circuit board 54 has rounded corners 58. Each of the rounded corners 58 of the circuit board 54 connects one of the two first side edges 64 to the lower edge 132. Each of the rounded corners 58 of the circuit board 54 connects one 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. The circuit board 54 has a main outer surface 74 of at least 1850 mm 2 and a maximum of 2700 mm 2 The main outer surface 74 is composed of a surface of a top side 138 of the circuit board 54 and a surface of a bottom side 140 (see Figure 4).

[0091] Figure 6 shows a further schematic view of the machine tool system 78 with the machine tool 80 comprising the machine tool device 10 and the tool 20.

[0092] The housing unit 12 has a conically tapered portion 76 in the drive section 16 toward the tool holder 22. The conically tapered portion 76 forms an angle of inclination 82 with the drive axis 30 of the drive unit 18. The angle of inclination 82 is greater than 1.00° and less than 5.00°. In this case, the angle of inclination 82 is approximately 2.50°.

[0093] The housing unit 12 has a maximum diameter 88 of 50.00 mm in the tapered portion 76 perpendicular to the drive axis 30. In this case, the maximum diameter 88 in the tapered portion 76 is approximately 48.00 mm.

[0094] The tapered portion 76 has an extension 92 of at least 44.00 mm along an inclination direction 90 relative to the drive axis 30. In the present case, the extension 92 of the tapered portion 76 has a length of exactly 50.00 mm.

[0095] The housing unit 12 has, in the drive section 16, a straight end section 100 arranged below the tapered section 76 in the direction of the tool holder 22. A diameter 102 of the straight end section 100 corresponds to a minimum diameter 104 of the tapered section 76. In the present case, the diameter 102 of the straight end section 100 and the minimum diameter 104 of the tapered section 76 are each approximately 44.00 mm. The drive section 16 of the housing unit 12 has, as viewed along the drive axis 30, a spherical cap-shaped surface section 84 on a side facing away from the tool holder 22.

[0096] 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 of 96.00 mm in the drive section 16.

[0097] A height extension 148 of the conically tapered portion 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 tapered portion 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.

[0098] A maximum diameter 106 of the tool 20 of the machine tool system 78 is larger than the maximum diameter 88 of the conically tapered portion 76 in the drive section 16 of the housing unit 12. Thus, a user of the machine tool system 78 can be provided with a good view of the tool 20 in the viewing direction parallel to the drive axis 30.

[0099] Figure 7 shows a schematic top view of the housing unit 12 viewed along the drive axis 30 (see Figure 6). A maximum diameter 86 of the spherical cap-shaped surface section 84 corresponds to a maximum diameter 88 (see Figure 6) of the conically tapered portion 76. As can be seen from Figure 6, the spherical cap-shaped surface section 84 and the conically tapered portion 76 merge into one another.

[0100] The housing unit 12 has a smallest width dimension 96 in a transition region 94 between the drive section 16 and the handle section 14. The smallest width dimension 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 tapered portion 76 (see Figure 6). In the present case, the smallest width dimension 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 tapered portion 76 and thus approximately 35.00 mm.

[0101] 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 tapered portion 76.

[0102] Figure 8 shows the machine tool device 10 in a further schematic sectional view. The machine tool device 10 has a cooling unit 108 for cooling the electronics unit 26. The cooling unit 108 comprises a main heat sink 110. The main heat sink 110 has a heat sink surface 112 (see Figure 9) of greater than 3000 mm 2 In an assembled state of the cooling unit 108, the main heat sink 110 is arranged on the underside 140 (see Figure 4) of the printed circuit board 54 of the electronics unit 26.

[0103] The cooling unit 108 has at least one secondary heat sink 114, which is connected to the main heat sink 110 via at least one connecting element (not shown). In the assembled state of the cooling unit 108, the main heat sink 110 and the secondary heat sink 114 are arranged on opposite sides of the electronics unit 26. In the present case, the main heat sink 110 is arranged on the underside 140 (see Figure 4) of the printed circuit board 54 of the electronics unit 26, and the secondary heat sink 114 is arranged on the top side 138 (see Figure 5) of the printed circuit board 54 of the electronics unit 26, opposite the underside 140. The connecting element, via which the secondary heat sink 114 is connected to the main heat sink 110, can be designed, for example, as a heat pipe that extends through the printed circuit board 54 of the electronics unit 26.An amount of heat accumulating at the electronics unit 26 in an operating state of the machine tool device 10 is initially dissipated predominantly via the main heat sink 110 and partially transported via the connecting element to the secondary heat sink 114 in order to further increase cooling performance.

[0104] A ratio between the heat sink surface 112 of the main heat sink 110 and a heat sink surface (not shown) of the secondary heat sink 114 is at least 10 to 1. The heat sink surface of the secondary heat sink corresponds to at least 300 mm 2 , in this case exactly 300 mm 2 . The ratio between the heat sink surface 112 of the main heat sink 110 and the heat sink surface of the secondary heat sink 114 is therefore at least 11.66 to 1.

[0105] The battery unit 24 is designed to continuously supply power to the drive unit 18 with a continuous current of at least 20 A and at most 45 A. In this case, the battery unit 24 is designed to continuously supply power 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 this case, the battery unit has a plurality of exactly three battery cells 128.

[0106] Figure 8 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 this case, the motor 122 is designed as an electronically commutated electric motor.

[0107] 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.

[0108] The motor 122 has a maximum length 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 length 126 of 24.00 mm parallel to the drive axis 30 of the drive unit 18. Figure 9 shows the main heat sink 110 of the cooling unit 108 together with the circuit board 54 of the electronics unit 26 in a schematic perspective view.

[0109] As previously described, the main heat sink 110 has a heat sink surface 112 (see Figure 9) of greater than 3000 mm 2In this case, the heat sink surface 112 of the main heat sink 110 is at least 3500 mm 2 . The heat sink surface 112 of the main heat sink 110 is therefore at least 10.00% larger than the main outer surface 74 (see Figures 4 and 5) of the printed circuit board 54 of the electronics unit 26. In the present case, the heat sink surface 112 of the main heat sink 110 is at least 29.00% larger than the main outer surface 74 of the printed circuit board 54 of the electronics unit 26.

[0110] A ratio between the total heat sink surface (not shown) of the cooling unit 108, which in this case is composed of the heat sink surface 112 of the main heat sink 110 and the heat sink surface of the secondary heat sink 114, and a continuous current which the battery unit 24 provides for operating the drive unit 18, is at least 100 mm 2 to 1 A. In the present case, the cooling unit 108 has a total heat sink surface of at least 3,800 mm 2and the battery unit 24 provides a continuous current of 28 A to operate the drive unit 18, so that the ratio between continuous current and total heat sink surface is at least 135 mm 2 to 1 A.

Claims

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 holder (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 electronics 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 holder (22).

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

3. Machine tool device (10) according to claim 1 or 2, characterized in that the main extension plane (28) of the electronic unit (26) is angled relative to the drive axis (30) and a movement axis (32) of the battery unit (24) Machine tool device (10) according to one of the preceding claims, characterized in that a 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 of at least 21.00° and at most 46.00°, preferably of at least 22.00° and at most 43.00°, preferably of 23°, with the main extension plane (28) of the electronics unit (26). Machine tool device (10) according to one of the preceding claims, characterized by an actuating element (40) arranged on the handle section (14) for actuating the electronic unit (26), wherein the actuating element (40) has a longest extension (42) running perpendicular to the drive axis (30), which corresponds to at least 25.00% of a longest extension (44) of the handle section (14) running perpendicular to the drive axis (30).Machine tool (10) according to claim 5, characterized in that the electronics unit (26) is delimited by a boundary plane (46) running parallel to the drive axis (30) and intersecting the battery unit (24) and / or the actuating element (40). Machine tool device (10) according to claim 5 or 6, characterized in that the electronics unit (26) is delimited by a further boundary plane (48) running parallel to the drive axis (30) and intersecting the actuating element (40). Machine tool device (10) according to one of claims 5 to 7, characterized in that the handle portion (14) in the region of the actuating element (40) has a circumference (50) of at least 130.00 mm and at most 140.00 mm, in particular of 133.00 mm. Machine tool device (10) according to one of claims 5 to 8, characterized in that a cross-section of the handle portion (14) in the region of the actuating element (14) is oval and / or polygonal with rounded corners 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. Machine tool device (10) according to one of the preceding claims, characterized in that the electronics unit (26) comprises a printed circuit board (54) with an outer contour (56) which is different from a rectangle. Machine tool device (10) according to claim 10, characterized in that the printed circuit board (54) has rounded corners (58) with a radius of 1.00 mm to 4.00 mm.Machine tool device (10) according to claim 10 or 11, characterized in that the printed circuit board (54) has a longitudinal extent (60) of at least 58.00 mm and at most 84.00 mm, in particular of at least 66.00 mm and at most 76.00 mm, preferably of 71.00 mm. Machine tool device (10) according to one of claims 10 to 12, characterized in that the printed circuit board (54) has a greatest width extent (62) of at least 28.00 mm and at most 45.00 mm, in particular of at least 30.00 mm and at most 42.00 mm, preferably of 39.00 mm. Machine tool device (10) according to one of claims 10 to 13, characterized in that the printed circuit board (54) has two equally large first side edges (64), which each have a first angle (68) of at least 13.00° and at most 33.00° with respect to a longitudinal direction (66) of the printed circuit board (54).

15. Machine tool device (10) according to one of claims 10 to 14, characterized in that the printed circuit board (54) has two equally large second side edges (70), which each have a second angle (72) of at least 5.0° and at most 25.0° with respect to a longitudinal direction (66) of the printed circuit board (54).

16. Machine tool device (10) according to one of claims 10 to 15, characterized in that the printed circuit board (54) has a main outer surface (74) of at least 1850 mm 2 and a maximum of 2700 mm 2 has.

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

18. Machine tool device (10) according to the preamble of claim 1, in particular according to one of the preceding claims, characterized in that a cooling unit (108) for cooling the electronics unit (26), which has a main heat sink (110) with a heat sink surface (112) of greater than 3000 mm 2 has.

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

20. Machine tool (80) with a machine tool device (10) according to one of the preceding claims. Machine tool system (78) with a machine tool (80) according to claim 20 and with at least one tool (20) for releasable connection to the tool holder (22).

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