Axial flux machine for an electric power tool and electric power tool having an axial flux machine

Abstract

The invention relates to an axial flux machine (10), in particular a single-sided axial flux motor, for an electric tool (34), having a machine shaft (12), in particular a motor shaft, a disc-shaped stator (20) configured as a winding carrier (22) for at least one stator winding (24), a disc-shaped rotor (14) arranged adjacent to the stator (20) in the axial direction (A) of the machine shaft (12) and being able to be placed in rotational motion relative to the stator (20), and a housing (82) for receiving the stator (20) and the rotor (14). It is proposed that a first bearing (28), in particular a fixed bearing (30), is integrated directly into the winding carrier (22) and / or a first stator yoke (26) for supporting the machine shaft (12). The invention also relates to an electric tool (34) having an axial flux machine (10) according to the invention.

Description

TECHNICAL FIELD

[0001] The invention relates to an axial flux machine for an electric working tool, in particular a single-sided axial flux motor, and to an electric working tool having an axial flux machine according to the generic subject matter of the independent claims. BACKGROUND

[0002] Compared to conventional electric motors having a radial flux direction, axial flux machines have the advantage that they are very efficient and have a significantly shortened structural length. Furthermore, a higher torque density or power density can be achieved with the same outer diameter. These improvements are due, inter alia, to a larger air gap area with a similar structural volume. Furthermore, due to the smaller iron volume of the rotating components, a higher efficiency is achieved over a larger speed range.

[0003] The construction of the stator of an axial flux machine is relatively expensive due to the required 3D flux guidance. Usually the nutung of the lamination stack has to be punched before the winding process of the stator winding. Furthermore, due to the individual sheets the following disadvantage arises, that the pole shoes only achieve a tangential protrusion, which makes it impossible to externally wind the stator teeth with protruding pole shoes, which leads to a small fill factor of the stator winding and to a correspondingly reduced efficiency.

[0004] An axial flux machine having a curved and wound lamination stack as a winding carrier is known from DE 10 2015 223 766 A1. The stator of the axial flux machine has a sintered carrier structure composed of a soft magnetic material and an insert configured as a lamination stack. The insert is attached to the carrier structure by form locking and / or force locking and at least partially forms the pole shoes of the axial flux machine. The lamination stack is formed on a single sheet composed of soft iron by means of individual, stacked layers. The individual sheets are attached to one another in an electrically insulated manner from the respectively adjacent sheet.

[0005] In axial flux machines according to the prior art, two bearings for the machine shaft of the axial flux machine are usually received in a separate housing of the axial flux machine. Furthermore, the housing positions the stator relative to the bearings. The two bearings are usually fixed in two end sides of the housing, wherein at least one end side has a removable cover with the bearing. However, it is alternatively also possible that at least one of the bearings is fixed directly in the housing of the electric working tool. SUMMARY

[0006] It is the task of the invention to provide an axial flux machine with a shortened axial structural length compared to the prior art in order to enable its use in very compact electric working tools with reduced structural space.

[0007] Advantages of the invention

[0008] The invention relates to an axial flux machine, in particular a single-sided axial flux motor, for an electric machining tool, having a machine shaft, in particular a motor shaft, a disc-shaped stator, a disc-shaped rotor arranged adjacent to the stator in the axial direction of the machine shaft, and a housing for receiving the stator and the rotor, wherein the stator is configured as a winding carrier for at least one stator winding, and the rotor, which is connected to the machine shaft against rotation, can be placed in rotational motion relative to the stator.

[0009] To solve the proposed task setting: the first bearing, in particular a fixed bearing, is integrated directly into the winding carrier and / or the first stator yoke for supporting the machine shaft. By integrating the bearing location into the winding carrier and / or the first stator yoke of the stator, the additional axial construction length of the bearing shield is dispensed with. Furthermore, by dispensing with the additional necessary components for supporting the machine shaft, costs can be reduced. The invention also enables the use of an efficient axial flux machine in a very compact electric machining tool with a small construction length.

[0010] The invention therefore also relates to an electric machining tool, in particular an electric power tool, having an axial flux machine according to the invention, in particular an axial flux motor according to the invention.

[0011] In the context of the invention, an electric machining tool is in particular to be understood as a battery-operated or mains-operated electric power tool which is used to machine workpieces by means of electrically driven insert tools. Here, the electric machining tool can not only be configured as a hand-held electric power tool, but also as a stationary electric power tool. In this context, typical electric power tools are hand-held or stand-mounted drills, screwdrivers, impact drills, drill hammers, demolition hammers planers, angle grinders, vibration sanders, polishers or the like. However, motor-driven garden appliances, such as lawn mowers, lawn trimmers, branch saws or the like, can also be considered as electric machining tools. In addition, the invention can be applied to axial flux machines in household appliances or kitchen appliances, such as washing machines, dryers, vacuum cleaners, blenders or the like.

[0012] Here, the term "axial flux machine" can include not only axial flux motors, but also axial flux generators for converting mechanical energy into electrical energy. Likewise, an axial flux machine is to be understood as an axial flux motor which is used at least sometimes to regenerate electrical energy from mechanical energy, for example when the electrically dynamic braking of the axial flux motor.

[0013] It is further proposed that the first bearing is pressed into the winding carrier and / or the first stator yoke of the axial flux machine. Alternatively, however, the first bearing can also be injected into the winding carrier and / or the first stator yoke. This enables a simple and cost-effective production.

[0014] It is particularly advantageous if the stator of the axial flux machine is received directly in the housing of the electric machining tool. Here, the stator and the housing of the electric machining tool are permanently connected to one another, in particular bonded, by a joining process. Alternatively or additionally, it is also possible for the stator and the housing of the electric machining tool to be permanently connected to one another, in particular crimped, by a form closure. By virtue of the direct connection between the stator and the electric machining tool, it is possible to keep the installation space of the electric machining tool particularly compact. Furthermore, a very stable and torsion-resistant construction of the electric machining tool thus results.

[0015] In a supplementary configuration of the application, the housing of the electric machining tool or the transmission housing receives a second bearing, in particular a floating bearing, which is connected to the machine shaft of the axial flux machine. Thus, the individual components of the axial flux machine, in particular the rotor, which is connected to the machine shaft in a torsionally rigid manner, can be removed more easily for maintenance work. As a result, the assembly of the electric machining tool and the axial flux machine also becomes simpler, while compactness is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the following, the application is explained according to Figures 1 to 10 The application is explained by way of example, in which identical reference signs in the drawings denote identical components having the same function.

[0017] which shows

[0018] Figure 1 : a sectional view of an axial flux machine according to the application in the form of a single-sided axial flux motor in a first embodiment,

[0019] Figure 2 : a schematic view of a further embodiment of a stator of an axial flux machine according to the application,

[0020] Figure 3 : Figure 2 : an exploded view of the stator in a schematic view without stator winding,

[0021] Figure 4 : a schematic view of a stator according to the application in a further embodiment,

[0022] Figure 5 : a schematic view of a further embodiment of a rotor of an axial flux machine according to the application,

[0023] Figure 6 : a schematic view of a housing of an axial flux machine according to the application,

[0024] Figure 7 : Figure 6 further schematic view of the hollow body of the axial flux machine according to the application in

[0025] Figure 8 : schematic view of a cross section of a further embodiment of a cooling air guiding device within an axial flux machine according to the application,

[0026] Fig. 9: two embodiments of a delta parallel circuit of a single tooth winding of a stator winding of an axial flux machine according to the application, and

[0027] Figure 10 : electric processing appliance, in particular electric power tool machine, with an axial flux machine according to the application, the electric power tool machine being in the form of a drill hammer. DETAILED DESCRIPTION

[0028] In Figure 1 a cross-sectional view of a first embodiment of an axial flux machine 10 according to the application is shown. The axial flux machine 10 can likewise be configured as an axial flux motor or as an axial flux generator. A disc-shaped rotor 14 is arranged on a machine shaft 12 of the axial flux machine 10 in a torque-proof manner with the machine shaft 12. The rotor 14 is configured as a plate-shaped ring 16 made of soft magnetic iron and carries magnetically alternating rings 18, which will also be discussed in more detail with reference to Figure 5 However, since the rotor 14 is generally not exposed to alternating fields and the danger of eddy current losses is therefore relatively small, the rotor 14 can alternatively also be composed of a non-soft magnetic material, for example iron, or of a soft magnetic steel with a low carbon content. In the axial direction A of the motor shaft 12, a likewise disc-shaped stator 20 is adjacent to the rotor 14 or to the magnetically alternating rings 18, which is configured as a winding carrier 22 for at least one stator winding 24 (cf. Figure 2 ) and has a first stator yoke 26, which serves as a magnetic return for the magnetic field generated by the stator winding 24 and the magnetically alternating rings 18. The rotor 14 can be placed in rotational motion relative to the stator 20 or to the stator winding 24 by means of the motor shaft 12. To this end, the motor shaft 12 is on the one hand supported by a first bearing 28 integrated into the stator yoke 26 and on the other hand is received in a housing 32 of an electric processing appliance 34 (cf. Figure 10The second bearing 36 in the first bearing 28, for example configured as a fixed bearing 30, and the second bearing, for example configured as a floating bearing 38, are rotatably supported. The first and second bearings 28, 36 are preferably configured as ball bearings. The first bearing 28 is directly integrated into the winding carrier 22 and / or the first stator yoke 26. This first bearing can thus be, for example, pressed or injected. Since the axial flux machine, in particular the single-sided axial flux machine, has a very high traction in the axial direction A of the machine shaft 12 in the air gap between the rotor 14 and the stator 20, this traction can be supported by the first bearing 28 configured as a fixed bearing 30 in the first stator yoke 26. It is thus not necessary to receive the axial forces by the housing 32 of the electrical machining tool 34 and / or by the housing of the axial flux machine (see Figure 6 and Figure 7 ).

[0029] For cooling the axial flux machine 10, a fan wheel 40 is arranged on the machine shaft 12 in a torque-proof manner, which fan wheel transports cooling air through the axial flux machine 10. For this purpose, the fan wheel 40 preferably sucks in cooling air in the radial direction in order to then transport the cooling air in the axial direction through the axial flux machine 10.

[0030] Figure 2 A schematic view of another embodiment of the disc-shaped stator 20 of the axial flux machine 10 according to the application is shown. The stator 20 essentially comprises a first stator yoke 26, a second stator yoke 42 arranged adjacent to the first stator yoke in the axial direction A of the machine shaft 12, and a winding carrier 22 arranged adjacent to the second stator yoke 42 in the axial direction A of the machine shaft 12. The winding carrier 22 essentially consists of a plurality of, in particular six, stator teeth 44, which carry a stator winding 24, wherein each stator tooth 44 is assigned a single tooth winding 46 of the stator winding 24. With reference to Figure 9a , the single tooth windings 46 are electrically connected to one another in a delta parallel circuit 48.

[0031] The stator teeth 44 and the first stator yoke 26 of the stator 20 are formed from a composite material (Soft Magnetic Composites, SMC) and are permanently connected to one another, in particular bonded, by a joining process. The SMC material consists of a high-purity iron powder which has a special surface coating on each individual particle. This electrically insulating surface ensures a high electrical resistance even after pressing and heat treatment, which in turn minimizes or even avoids eddy current losses. It is particularly advantageous compared to prior art axial flux machines that an axial flux machine which is extremely resistant to mechanical stress and at the same time very high-performing and efficient or a high-torque axial flux motor can thus be provided. The joining of the stator teeth 44 to the first stator yoke 26 can be achieved by applying the stator winding 24 or in other words the single tooth winding 46 to the stator teeth 44 during the joining process. In this way a high fill factor of the stator winding 24 can be achieved.

[0032] Unlike the first stator yoke 26, the second stator yoke 42 of the rotor 20 consists of a soft magnetic iron and is configured as a lamination stack 48 (see Figure 3 ), which has a plurality of, in particular six, slots 50 which are distributed over the outer circumference of the lamination stack and serve to receive the composite material. The number of slots 50 here corresponds to the number of stator teeth 44. The second stator yoke 42 thus stabilizes the stator 20 in the case of strong mechanical stress and, due to its high magnetic permeability, ensures an improved magnetic flux guidance. The slotting of the lamination stack 48 not only facilitates better reception of the composite material and thus results in a higher stability of the stator 20, but also ensures an optimized guidance of the eddy currents essentially caused by the stator winding 24.

[0033] According to Figure 3 , the second stator yoke 42 for receiving the stator teeth 44 has annularly arranged, circular-arc-segment-shaped notches 52, wherein each slot 50 interrupts the outer circumference of the second stator yoke 42 up to the respectively radially inwardly placed notch 52. Each stator tooth 44 is formed by a circular-arc-segment-shaped tooth flange 54, which penetrates the circular-arc-segment-shaped notches 52 of the second stator yoke 42, and a circular-arc-segment-shaped carrier frame 56, which surrounds the tooth flange 54 and has a circumferential U-shaped profile 58 for receiving the stator winding 24 or in other words the single tooth winding 46. The tooth flange 54 and the carrier frame 56 are permanently connected to one another, in particular bonded, by a joining process.

[0034] Figure 4 A schematic view of a partial view of a stator 20 according to the application is shown in a further embodiment. Here, the stator teeth 44 or in other words their tooth flanges 54 (see Figure 3) are guided through the recesses 52 of the second stator yoke 42 and permanently connected with the first stator yoke 26 by means of laser welding. In each face of the stator teeth 44, which lies on the first stator yoke 26, a bore hole 60 in the first stator yoke 26 is arranged approximately centrally, through which the stator teeth 44 can be connected with the first stator yoke 26 by means of laser welding. The weld seam extends over the entire circumference of the bore hole 60 in order to permanently connect the first stator yoke 26 and the corresponding stator tooth 44. However, it is also possible that the weld seam extends only pointwise over the circumference of the bore hole 60. Due to the welding in the center of each stator tooth 44, the guidance of the magnetic flux is only slightly affected and a high planar parallelism of the stator teeth 44 and the radial air gap between them can be achieved. Due to the avoidance of the adhesive bond, an adhesive bond gap between the stator teeth 44 and the first stator yoke 26 can be effectively avoided and it is not necessary to fix the stator teeth 44 and the first stator yoke 26 during the hardening of the adhesive bond. With reference to Figure 1 It is also possible to consider, instead of the second stator yoke 42, that the first stator yoke 26 is directly connected with the stator teeth 44 composed of a composite material, in particular by means of the bore holes 60 in the first stator yoke 42, which is configured as a plate-like ring 16 made of soft magnetic iron.

[0035] In Figure 5 a cross-sectional view of a rotor 14 of an axial flux machine 10 according to the application is shown. The rotor 14 is configured as a plate-like ring 16 made of soft magnetic iron. Furthermore, the rotor carries alternatingly polarized magnetic rings 18, which act together with the stator windings 24 of the stator 20 in order to put the rotor 14 into rotational motion in the motor mode or to induce a voltage into the stator windings 24 in the generator mode. The magnet segments of the magnetic rings 18, which are not shown in detail, are configured in a circular segment shape, such that the faces of the magnets coincide with the circular segment-shaped stator teeth 44 to the greatest extent in order to achieve an optimized magnetic flux while achieving a high torque. Instead of the alternatingly polarized magnetic rings 18, it is also possible to consider rings with embedded single magnets. As mentioned above, the rotor 14 is generally not exposed to an alternating field, so that no or only very little eddy current losses occur here. Therefore, the rotor 14 of the axial flux machine 10 can also be composed of a non-soft magnetic material instead.

[0036] In a preferred configuration of the application, the plate-shaped ring 16 of the rotor 14 is configured as a rotor yoke 62 which is either permanently connected, in particular bonded, to the bidirectional fan 40 by a joining process or which itself serves as a bidirectional fan 64. Here, the bidirectional fan 40, 64 has at least one radial air flow direction 66 and an axial air flow direction 68 in order to cool the axial flux machine 10, in particular the stator 20 or the stator winding 24 and the rotor 14. The radial air flow direction 66 is here essentially achieved by a plurality of radial air vanes 70 which are arranged circularly in the outer radius region of the bidirectional fan 40, 64, while the axial air flow direction 68 is achieved by a plurality of axial openings 72 which are arranged in the inner radius region of the rotor yoke 62.

[0037] Thus, with reference to Figure 6 , the bidirectional fan 40, 64 causes a radial intake 74 of an air flow 76 with a radial throughflow 78 of the stator 20 and the rotor 14 of the axial flux machine 10 and a radial escape 80 of the heated air flow 76 from the housing 82 of the axial flux machine 10. The radial intake 74 of the air flow 76 takes place on the one hand through the air gap between the stator teeth 44 (see Figure 2 ) and on the other hand in the region of the first stator yoke 26 of the stator 20, in particular on the end side 84 of the first stator yoke 26 which is distal with respect to the rotor 14.

[0038] In Figure 7 , the axial flux machine 10 is shown with the housing 82 of the axial flux machine together with a cover 86 which closes the housing. Figure 8 The housing 82 is shown without the axial flux machine 10 and the cover 86. The housing 82 is open on one side in order to receive the cover 86 and has an essentially closed end side 88 (see Figure 8 ) opposite. The cover 86 closes the housing 82 and thus force-locked connects the stator 20 and the rotor 14 of the axial flux machine 10. "Essentially closed" is to be understood in this context in that the end side 88 can have a plurality of openings 90, for example for cooling, as cable passages and / or as a feedthrough for the machine shaft 12, but alternatively also in that the end side 88 is completely closed. The housing 82 is configured as a cylinder and fixes the stator 20 such that a defined air gap is produced between the rotor 14 or the magnetic ring 18 of the rotor and the stator 20 or the winding carrier 22 of the stator. In order to reduce or avoid eddy current losses, the housing 82 is made of a magnetically insulating material, for example plastic (PA66), which has as low a magnetic permeability as possible. The cover 86 can also be configured accordingly.

[0039] The first bearing 28, which is configured as a fixed bearing 30, is fixed in a bearing flange 92 of the cover 86, which fixed bearing supports the machine shaft 12 in a non-displaceable manner, while the substantially closed end side 86 of the housing 82 has a second bearing 36, which is configured as a floating bearing 38, in a further bearing flange 94 for supporting the machine shaft 12 in a displaceable manner. In this way, it is possible to push the housing 82 away very easily after assembly of the axial flux machine 10 and to remove it again for possible maintenance work.

[0040] On the open side of the housing, a plurality of notches 96 and tabs 98 are arranged alternately in a manner distributed over the circumference of the housing 82 in order to receive and fix the stator 20. Here, radially protruding portions (see Figure 2 and Figure 3 ) distributed over the circumference of the first and second stator yokes 26, 42 of the stator 20 are fitted into the corresponding notches 96 of the housing 82. Correspondingly, the cover 86 also comprises radially protruding portions configured as tabs 106, which are fitted into the notches 96 of the housing 82. In this way, it is possible to guide the high axial forces of the axial flux machine 10 in the direction of the cover 86. At least one drill hole 100 is provided in each tab 98 of the housing 82, which drill hole serves to fix the cover 86 and thus also the stator 20 by means of a corresponding fastening means 102, in particular a screw 104. The fastening means 102 transmit the axial forces of the axial flux machine 10 to the housing 82 and thus bear a shearing force.

[0041] The opening 90 on the substantially closed end side 88 of the housing 82 is configured as a radially and / or axially acting ventilation opening 104, in particular as a ventilation outlet 106, for cooling the axial flux machine 10 (see also Figure 6 ). Furthermore, the housing 82 has a plurality of radially acting ventilation openings 108, in particular ventilation inlets 110, distributed over the circumference approximately centrally between the substantially closed end side 88 and the open side opposite in the axial direction A. In addition to the openings 90 for cooling the axial flux machine 10, further openings 90 are also provided in the tabs 98 of the housing 82, which further openings can be used as a lead-through 112 for sensor lines or the like.

[0042] In Figure 9a , the circuit diagram of the stator winding 22 is shown as six single tooth windings 46 of the stator teeth 44 (see Figure 2A triangular parallel circuit 48 for the single tooth windings 46 of one phase is shown in detail. For each phase, two single tooth windings 46 are connected in parallel between the connection points U and V, V and W or W and U, respectively. The triangular circuit itself causes the entire supply voltage to drop across each single tooth winding 46. This results in an increase in the number of turns of the single tooth winding 46 in order to achieve a certain required rotational speed when the motor is running or a certain required energy yield when the generator is running. By means of the additional parallel circuit, it is possible to increase the winding wire diameter in a particularly advantageous manner and thus to reduce the resulting internal resistance. The triangular parallel circuit 48 thus enables a reduction in the internal resistance of the axial flux machine 10 compared to the common star circuit, which leads to a significant increase in the power capability of the axial flux machine 10 compared to the solutions to date. Figure 9b An alternative embodiment of a triangular parallel circuit 48 for a total of nine single tooth windings 46 of the stator winding 22 is shown.

[0043] In Figure 10 An embodiment of an electric machining appliance 34 having an axial flux machine 10 according to the application is shown in accordance with Figure 1 The electric machining appliance 34 is configured as an electric power tool 112 in the form of an electric mains-operated hammer drill having an electric motor-driven impactor 114, which places a drill chuck 116 for a not shown insert tool into rotational and / or impact motion. Here, the specific configuration of the hammer drill is not explored in detail, since this is sufficiently known to the person skilled in the art. The electric machining appliance can also be understood as any other electric battery-operated or electric mains-operated electric power tool 112 for machining workpieces by means of electrically driven insert tools. Here, the electric machining appliance can be configured not only as a hand-held electric power tool, but also as a stationary electric power tool. In this context, typical electric power tools are hand-held or stand-mounted drills, screwdrivers, impact drills, hammer drills, demolition hammers grinders, vibration sanders, polishers or the like. However, motor-driven garden appliances, such as lawn mowers, lawn trimmers, branch saws or the like, can also be considered as electric machining appliances. In addition, the application can be applied to axial flux machines in household appliances or kitchen appliances, such as washing machines, dryers, vacuum cleaners, mixers or the like.

[0044] The axial flux machine 10 of the electric power tool 112, which works as an axial flux motor, drives the percussion machine 114 by means of the machine shaft 12 of the axial flux machine in a known manner via a transmission 118. Here, the actuation of the axial flux machine 10 takes place by means of a main switch 122 arranged in a D-shaped handle 120 of the electric power tool 112, which main switch acts jointly with electronic devices not shown for energizing the stator winding 22 connected in a delta parallel circuit 48. The stator 20 of the axial flux machine 10 is received directly in the housing 32 of the electric power tool 112. For this purpose, the stator 20 and the housing 32 are permanently connected to one another, in particular glued, by a joining process. However, alternatively, the stator 20 can also be permanently connected to the housing 32 by form closure, in particular verpressen. It can further be provided that the housing 32 of the electric power tool 112 or a transmission housing 122 receives a second bearing 36, in particular a floating bearing 38, connected to the machine shaft 12 of the axial flux machine 10. Instead of the axial flux machine 10 shown according to Figure 1 , the electric power tool 112 or the electric processing tool 34 can also (without limiting the invention) be equipped with an axial flux machine 10 according to Figures 6 to 8 .

[0045] Finally, it should be noted that the invention is not limited to the shown embodiment according to Figures 1 to 10 , nor to the mentioned number of stator teeth, single tooth windings and magnets of the magnetic ring.

Claims

1. An electro-chemical machining tool (34) having an axial flux machine (10), wherein, The axial flux machine (10) has a machine shaft (12), a disc-shaped stator (20), a disc-shaped rotor (14) arranged adjacent to the stator (20) in the axial direction (A) of the machine shaft (12) and a housing (82) for receiving the stator (20) and the rotor (14), wherein the stator (20) is configured as a winding carrier (22) for at least one stator winding (24) and the rotor (14), which is connected to the machine shaft (12) against rotation, can be placed in rotational motion relative to the stator (20), wherein a first bearing (28) is integrated directly into the winding carrier (22) and / or a first stator yoke (26) for supporting the machine shaft (12), characterized in that a housing (32) of the electrical machining tool (34) or a transmission housing (122) receives a second bearing (36) connected to the machine shaft (12) of the axial flux machine (10).

2. The electro-processing tool (34) according to claim 1, characterized in that The electrical machining tool (34) is an electric power tool (112).

3. The electro-processing tool (34) according to claim 1, characterized in that The axial flux machine (10) is a single-sided axial flux motor.

4. The electro-processing tool (34) according to claim 1, characterized in that The machine shaft is a motor shaft.

5. The electro-processing tool (34) according to claim 1, characterized in that The first bearing (28) is a fixed bearing (30).

6. The electro-processing tool (34) according to claim 1, characterized in that The second bearing (36) is a floating bearing (38).

7. The electro-processing tool (34) according to any one of claims 1 to 6, characterized in that The first bearing (28) is pressed into the winding carrier (22) and / or the first stator yoke (26).

8. The electro-processing tool (34) according to any one of claims 1 to 6, characterized in that The first bearing (28) is injected into the winding carrier (22) and / or the first stator yoke (26).

9. The electro-processing tool (34) according to any one of claims 1 to 6, characterized in that The stator (20) is received directly in the housing (32) of the electrical machining tool (34).

10. The electro-processing tool (34) according to claim 9, characterized in that The stator (20) of the axial flux machine (10) and the housing (32) of the electrical machining tool (34) are permanently connected to one another by a joining process.

11. The electro-processing tool (34) according to claim 10, characterized in that The stator (20) of the axial flux machine (10) and the housing (32) of the electrical machining tool (34) are bonded to one another by a joining process.

12. The electro-processing tool (34) according to claim 9, characterized in that The stator (20) of the axial flux machine (10) and the housing (32) of the electrical machining tool (34) are permanently connected to one another by a form closure.

13. The electro-processing tool (34) according to claim 12, characterized in that The stator (20) of the axial flux machine (10) and the housing (32) of the electrical machining tool (34) are permanently connected to one another by a form closure.

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