Drive motor with insulating sleeve

Abstract

The invention relates to a drive motor for a suction instrument (400) or a machine tool in the form of a handheld machine tool (200, 300) or a semi-stationary machine tool, wherein the drive motor (20, 120) has a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130), the motor shaft being rotatably supported on or with respect to the stator (80) by means of a bearing assembly (24A) about an axis of rotation (D) and extending through an axial through-opening (42, 142) of a laminated core (41, 141), the laminated core being held on the motor shaft (30, 130) and being electrically insulated from the motor shaft (30, 130). An insulating sleeve (60) is arranged between the motor shaft (30, 130) and the laminated core (41, 141), the insulating sleeve being inserted into the shaft through-opening (42, 142) and having a plug-in receptacle (64) with an insertion opening (64A), the motor shaft (30, 130) being inserted into the plug-in receptacle along a plug-in axis (S) through the insertion opening.

Description

Technical Field

[0001] The invention relates to a drive motor for a suction instrument or a machine tool in the form of a handheld machine tool or a semi-stationary machine tool, wherein the drive motor has a stator with an excitation coil assembly and a rotor with a motor shaft, wherein the motor shaft is rotatably supported on the stator or about the stator by means of a support assembly about a rotation axis and passes through an axial through-opening of a laminated core, wherein the laminated core is held on the motor shaft and is electrically insulated from the motor shaft. Background Art

[0002] In order to insulate the laminated core from the motor shaft, it is common to surround the two bodies with an insulating material by injection molding, as is known, for example, from DE 1 538 885 A1. However, such production is complex. Summary of the invention

[0003] It is therefore an object of the present invention to provide an improved drive motor.

[0004] To achieve this object, it is provided that an insulating sleeve is arranged between the motor shaft and the laminated core, which insulating sleeve is inserted into the shaft through-opening and has a plug receptacle with an insertion opening, through which the motor shaft is inserted into the plug receptacle along a plug axis.

[0005] The plug-in axis preferably corresponds to the axis of rotation of the drive motor and / or the longitudinal axis of the motor shaft and / or the longitudinal axis of the insulating sleeve. The plug-in axis, along which the motor shaft is inserted into the plug-in receptacle, preferably corresponds to the plug-in axis along which the insulating sleeve is inserted into the shaft through-opening of the laminated core or runs parallel to the plug-in axis.

[0006] The basic idea here is to simplify the assembly or production of the drive motor. The insulating sleeve forms a simple plug-in body, which is inserted into the shaft through-opening of the laminated core and in turn provides a plug-in receptacle for inserting or inserting the motor shaft. Advantageously, the insulating sleeve is first inserted into the shaft through-opening before the motor shaft is inserted into the plug-in receptacle of the insulating sleeve. However, it is also conceivable that the motor shaft is first inserted into the plug-in receptacle of the insulating sleeve and then the insulating sleeve arranged on the motor shaft is inserted into the shaft through-opening.

[0007] Preferably, the insulating sleeve extends over the entire length of the laminated core relative to the plug-in axis. This means that the holding section of the motor shaft, at which the laminated core is held, is completely electrically insulated from the laminated core by the insulating sleeve.

[0008] It is also possible that the laminated core is electrically insulated from the motor shaft only by means of the insulating sleeve. In addition, however, it is possible to take further insulation measures, that is, for example, the motor shaft itself also has an insulating layer, which is arranged between the insulating sleeve and the motor shaft in the assembled state of the drive motor. It is also conceivable that the insulating sleeve is inserted into the shaft through-opening of the laminated core, but is additionally cast with a plastic material, for example. This provides additional insulation.

[0009] The motor shaft preferably projects in front of an insertion opening of the insulating sleeve and / or in front of an exit opening of the plug-in receptacle, which is arranged in the longitudinal end region of the insulating sleeve opposite the insertion opening. That is, the motor shaft can, for example, project in front of the insulating sleeve on both sides in order to be rotatably supported relative to the stator there, for example by means of a bearing assembly, in particular by means of a ball bearing, a roller bearing or a similar other rolling bearing. However, it should be mentioned in this connection that the insulating sleeve can also, for example, extend as far as one of the bearings, that is, the insulating sleeve can provide electrical insulation, for example in the form of a sandwich, between the bearing receptacle of the bearing and the motor shaft.

[0010] The insulating sleeve expediently has at least one longitudinal stop relative to the plug-in axis for abutting against the laminated core. The longitudinal stop can, for example, comprise a radial projection which projects radially in front of the tube section of the insulating sleeve relative to the rotational axis or the plug-in axis.

[0011] The insulating sleeve expediently has a flange body that projects in front of the tube section of the insulating sleeve for supporting the laminated core with respect to the plug-in axis. The tube section is, for example, completely or substantially accommodated in the shaft through-opening. The flange body can be an annular flange body, that is, it extends annularly around the axis of rotation or the plug-in axis. However, it is also possible that the flange body is a partial annular body, that is, not completely annular.

[0012] The insulating sleeve is advantageously clamped between the laminated core and the motor shaft in one or more force directions, for example in a force direction radial to the axis of rotation and / or in a force direction parallel to the axis of rotation. For example, it is provided that the insulating sleeve is clamped to the laminated core radially outwardly with respect to the axis of rotation via the motor shaft. That is, the motor shaft inserted or inserted into the plug-in receptacle ensures that the insulating sleeve is clamped between the motor shaft and the shaft through-opening or the laminated core.

[0013] Suitably, at least one support projection projects from the lamination stack into the shaft through-opening, said support projection penetrating into the insulating sleeve. It is possible here that at least one support projection penetrates into the insulating sleeve or an outer wall of the insulating sleeve when it is clamped with the shaft through-opening by the motor shaft and / or is pressed into the shaft through-opening by the motor shaft. In other words, it is possible that at least one support projection does not project into a plug-in cross section of the shaft through-opening, which is provided for inserting the insulating sleeve into the shaft through-opening when no motor shaft is arranged in the insulating sleeve. However, the motor shaft inserted into the plug-in receptacle of the insulating sleeve presses the radial outer circumference of the insulating sleeve in the direction of the at least one support projection, so that the radial outer circumference reaches a form-fitting engagement with the insulating sleeve and / or is, so to speak, gripped or clamped with the insulating sleeve. It is particularly advantageous that when the insulating sleeve is accommodated in the shaft through-opening and / or is pressed by the motor shaft in the direction toward the shaft through-opening, the at least one support projection plastically deforms the outer surface of the insulating sleeve. The at least one support projection, for example, forms a retaining claw for claw-like penetration into the insulating sleeve.

[0014] Preferably, a plurality of bearing projections are provided, which have an angular spacing and / or a longitudinal spacing relative to one another with respect to the plug-in axis or the rotation axis. It is particularly advantageous if at least one bearing projection is provided on opposite sides of the shaft through-opening.

[0015] With respect to the plug-in axis or the axis of rotation, it is advantageous if a plurality of bearing projections or groups of bearing projections are present which are spaced apart from one another, so that they can be inserted into the insulating sleeve at longitudinal distances with respect to the plug-in axis or the axis of rotation.

[0016] At least one form-fitting portion is preferably formed on the insulating sleeve, at which the insulating sleeve is pressed radially outwardly with respect to the rotation axis into a form-fitting engagement with the laminated core by the motor shaft inserted into the plug-in receptacle. The form-fitting portion can include, for example, one or more portions which penetrate between or are accommodated between two of the aforementioned support projections and / or which penetrate into a form-fitting receptacle of the laminated core. The at least one form-fitting portion of the insulating sleeve can also include a form-fitting receptacle, into which a support projection of the laminated core engages.

[0017] Preferably, at least one form-fitting part comprises a step, at which the end face of the laminated core is supported. Preferably, the step is annular or flange-shaped. The plug-in receptacle has, for example, an inner cross section directly next to the laminated core before the motor shaft is inserted, which is enlarged or widened by the insertion of the motor shaft, so that a form-fitting part or a step is formed.

[0018] Furthermore, it is advantageous if the insulating sleeve and the motor shaft are in engagement with one another by means of a positive-fitting contour, for example parallel to the plug-in axis and / or the longitudinal axis of the motor shaft or the insulating sleeve and / or in a rotationally fixed manner. In this case, the positive-fitting contour, for example a groove, a slot, a honeycomb-like structure or a similar other positive-fitting contour part, can be provided, for example, at the inner circumference of the insulating sleeve and / or at the outer circumference of the motor shaft, in particular at the region with which the motor shaft is accommodated in the insulating sleeve in the assembled state. For example, one or more longitudinal grooves and / or longitudinal projections at the radial outer circumference of the motor shaft can be advantageous.

[0019] Advantageously, it is provided that the insulating sleeve is plastically deformed along the plug-in axis when the insulating sleeve is inserted into the shaft through-opening and / or when the motor shaft is inserted into the insulating sleeve so that the motor shaft is held in the insulating sleeve and / or the insulating sleeve in the shaft through-opening of the laminated stack in a form-fitting manner, in particular in a manner that is rotationally fixed with respect to the plug-in axis and / or displacement-resistant with respect to the plug-in axis.

[0020] The plug-in receptacle preferably has a first internal cross section, which is assigned to the longitudinal end region of the laminated core facing the insertion opening. In addition, the plug-in receptacle has a second internal cross section, which is assigned to the longitudinal end region of the laminated core facing away from the insertion opening. That is, the section of the insulating sleeve, at which the insulating sleeve has the first and second internal cross sections, reaches the laminated core at the corresponding longitudinal end region in the state in which the insulating sleeve is mounted on the laminated core. In the state in which the motor shaft is fully inserted in the plug-in receptacle, a section of the motor shaft with a first external cross section abuts the plug-in receptacle in the region of the first internal cross section and a section of the motor shaft with a second external cross section abuts the plug-in receptacle in the region of the second internal cross section. For clamping the insulating sleeve about the shaft through-opening, in particular for radially clamping the insulating sleeve, the two subsequent measures are advantageous individually or in combination. The first internal cross section of the plug-in receptacle is advantageously larger than the second internal cross section. Clamping is possible even when it is advantageously provided that the first and second external cross-sections of the motor shaft are identical or even when the first external cross-section of the motor shaft is larger than the second external cross-section, but of course when the difference between the first external cross-section and the second external cross-section is smaller than the difference between the first internal cross-section and the second internal cross-section of the plug-in receptacle.

[0021] Furthermore, it is advantageous if the first outer cross section of the motor shaft is smaller than the second outer cross section. It is possible for the plug-in receptacle to have identical first and second inner cross sections or even for the first inner cross section to be smaller than the second inner cross section when the difference between the two inner cross sections is smaller than the difference between the outer cross sections of the motor shaft.

[0022] Thus, that is to say, it is advantageous if the first inner cross section and the first outer cross section and also the second inner cross section and the second outer cross section complement each other and / or match each other. In this case, the inner and outer cross sections can be, for example, circular, in particular annular. However, it is also possible that the mutually matching or complementary cross sections or contours of the plug receptacle or the outer contour of the motor shaft are not circular, for example polygonal or have a similar other contour, in order to achieve a torsion lock between the plug receptacle or the insulating sleeve and the motor shaft.

[0023] It is also advantageous if the second inner cross section of the plug receptacle is enlarged or widened by the second outer cross section of the motor shaft inserted therein. Of course, the first inner cross section can also be enlarged or widened by the first outer cross section of the motor shaft.

[0024] Although it is possible that one or more steps are present between different internal or external cross-sections. It is also possible that the internal or external cross-section is designed in the manner of an annular flange or an annular contact surface. However, it is preferred that the internal cross-section of the plug-in receptacle decreases continuously from the first internal cross-section to the second internal cross-section, in particular decreases continuously in a conical manner or in the manner of a plug-in cone. When the insulating sleeve is manufactured as a casting, such a structural form also enables, for example, simple demolding of the insulating sleeve. It is also advantageous that the external cross-section of the motor shaft increases continuously from the first external cross-section to the second external cross-section. Alternatively, steps or other similar discontinuous contours would also be possible.

[0025] Preferably, the shaft through-opening has the same internal cross-section over its entire length with respect to the plug-in axis or the rotation axis of the rotor. For example, identical or equivalent laminations can then be used to form the lamination stack. In this context, it should also be mentioned that the laminations can differ from one another in terms of function, for example in order to provide the already mentioned support projections. However, it is also possible to take measures, in particular, to simplify the insertion of the insulating sleeve into the shaft through-opening. It is advantageous, for example, that the shaft through-opening of the lamination stack has a larger internal cross-section at the longitudinal end region provided for the insertion of the insulating sleeve than at the longitudinal end region opposite the longitudinal end region.

[0026] Advantageously, an anti-twist profile is provided, by means of which the insulating sleeve and the lamination stack are anti-twistably engaged with each other about the rotation axis. The anti-twist profile can, for example, include mutually complementary projections and receptacles, in particular longitudinal grooves and longitudinal projections or ribs. For example, a longitudinal groove or an anti-twist receptacle is provided at the lamination stack, and an anti-twist projection, such as a longitudinal projection or a longitudinal rib, is present at the insulating sleeve. The anti-twist projection, for example, radially extends before the outer periphery of the insulating sleeve, for example, a columnar or circular shape, about the plug-in axis and / or the rotation axis and / or the longitudinal axis of the insulating sleeve. On the contrary, the anti-twist receptacle is, for example, designed as an anti-twist receptacle or a deepening portion extending radially into the inner periphery of the shaft through-opening. It is no problem, but it is also feasible that, for example, at least one anti-twist projection, for example a longitudinal rib or a longitudinal projection, extends radially inwardly to the anti-twist receptacle or a deepening portion, for example, a longitudinal groove of the insulating sleeve for form-fitting engagement to extend before the inner periphery of the shaft through-opening. Thus, that is, at least one anti-twist receptacle can be provided on the laminated core and at least one anti-twist projection can be provided on the insulating sleeve and / or vice versa at least one anti-twist projection is provided on the laminated core and at least one anti-twist receptacle is provided on the insulating sleeve.

[0027] The anti-twist projection and / or the anti-twist receptacle can extend over the entire longitudinal length of the part of the shaft receptacle and / or the insulating sleeve which is inserted into the shaft receptacle in the assembled state. However, it is also possible that the anti-twist projection and / or the anti-twist receptacle extends only over a part of the length of the part of the shaft receptacle or the insulating sleeve.

[0028] With respect to the plug-in axis, multiple pairs of anti-twist projections and anti-twist receptacles can be arranged at angular intervals on the insulating sleeve and the shaft receptacle, for example on opposite sides or the like. Preferably, a single pair of anti-twist projections and anti-twist receptacles is arranged on the insulating sleeve or the shaft receptacle or the lamination stack.

[0029] The insulating sleeve can extend only within the lamination stack. Preferably, however, the insulating sleeve projects in front of the lamination stack at one or both end sides and has an insulating section there. The insulating section can provide an additional insulating distance of at least 5 mm, preferably at least 7 mm, or even at least 8 mm between the lamination stack and the motor shaft. The insulating distance corresponds, for example, to the air distance between the motor shaft on the one hand and the lamination stack on the other hand.

[0030] The insulating section preferably comprises a tube section or is formed by a tube section which does not protrude radially outwards with respect to the rotation axis before a section of the insulating sleeve which is accommodated in the shaft through-opening of the laminated core, for example also a tube section, wherein the section is arranged next to the insulating section with respect to the plug-in axis, in particular directly next to it. Thus, that is to say, the insulating section can be tubular. Such an insulating section is suitable for being inserted through the shaft through-opening of the laminated core.

[0031] However, it is also possible that the insulating section comprises a flange body, in particular an annular or partially annular flange body, which projects radially outwards in front of the tube section of the insulating sleeve accommodated in the laminated core with respect to the rotation axis. The flange body can simultaneously form a supporting stop or a longitudinal stop, by means of which the insulating sleeve is stopped at the end side of the laminated core.

[0032] The insulating sleeve is advantageously inserted into the shaft through-opening in a state below the operating temperature of the drive motor. A temperature of, for example, less than 40° C. is preferred. The operating temperature of the drive motor is, for example, between 90° C. and 120° C., in particular approximately a maximum of 100° C. Thus, the insulating sleeve is inserted into the shaft through-opening in a state that is, so to speak, is cooled. This prevents the insulating sleeve from, so to speak, starting to flow when the drive motor is in operation.

[0033] The insulating sleeve is preferably made of plastic, in particular of glass-fiber reinforced plastic. Polyamide is particularly suitable as plastic. Polyamide consisting of PA6 and PA66 is preferred. The glass fiber reinforcement is, for example, 20% to 30% of the polyamide material, but can also be up to 50% of the polyamide material. The insulating sleeve preferably retains its solid structure up to a temperature of at least 120° C., preferably at least 130° C., at least 140° C. or even at least 155° C., that is to say, the insulating sleeve softens only when further heated.

[0034] Advantageously, such an insulating sleeve is also suitable for a system comprising a first drive motor and a second drive motor, wherein the drive motors each have a stator with an excitation coil assembly and a rotor with a motor shaft, wherein the motor shaft is rotatably supported on the stator or about the stator by means of a support assembly about a rotation axis and passes through an axial through-opening of a laminated core, which is held at a holding section of the corresponding motor shaft.

[0035] The system is designed, for example, in the manner of a motor assembly.

[0036] The drive motor is provided, for example, for a suction device or a machine tool in the form of a handheld machine tool or a semi-stationary machine tool or forms a component of a suction device or a machine tool.

[0037] The respective or each drive motor is provided, for example, for a suction device or a machine tool in the form of a handheld machine tool or a semi-stationary machine tool or forms a component of a suction device or a machine tool, ie a handheld machine tool or a semi-stationary machine tool.

[0038] The first drive motor is arranged in a first device or is provided for arrangement in the first device, and the second drive motor is arranged in a second device or is provided for arrangement in the second device, wherein the first and second devices are different from each other. The first device or the second device is, for example, a handheld machine tool or a semi-stationary machine tool or a suction device. Thus, that is to say, for example, the first drive motor is provided for the first handheld machine tool and the second drive motor is provided for the second handheld machine tool or the suction device.

[0039] However, it is basically possible to use the two drive motors or at least two drive motors according to the invention in the same machine tool or the same vacuum device.

[0040] In this system, it can be arranged that the retaining sections of the motor shafts of the drive motors have an identical outer peripheral geometry in the area of ​​the laminated core, wherein the laminated core of a first drive motor is directly supported at the outer periphery of the retaining section of the motor shaft carrying the laminated core and the laminated core of a second drive motor is supported at the retaining section of the motor shaft carrying the laminated core by means of an electrically insulating insulator and the insulator is formed by an insulating sleeve.

[0041] The basic idea here is that the same motor shaft can be used for different types of drive motors. In order to provide matching to different voltage ranges, insulation between the motor shaft and the laminated core is not necessary in one drive motor, but is implemented by means of an insulator in another drive motor. Thus, for example, a substantially identical mechanical structure, identical bearings for the drive motors and the like can also be provided in the corresponding stators of the drive motors. Thus, in other words, a modular principle can be implemented.

[0042] A length scale of the drive motor with respect to the axis of rotation or in the direction of the axis of rotation is possible without any problem. Drive motors that are longer or shorter with respect to the axis of rotation can, for example, have different powers.

[0043] For example, the lamination stack of the stator or the rotor or both can be of different lengths.Preferably, different numbers of laminations can be laminated into a lamination stack.

[0044] Furthermore, stators of different lengths can be produced by providing sections of different lengths of the carrier or of the carrier which carries or surrounds the laminated core at one or both end faces.

[0045] The insulating sleeves can also have different lengths with identical geometries. For example, the section of the insulating sleeve that accommodates the retaining section of the respective motor shaft can be designed to be matched to the length of the retaining section. In addition to the section that accommodates the retaining section of the motor shaft, identical geometries can be present in different insulating sleeves, for example, insertion openings or the like that are designed identically in terms of geometry.

[0046] The magnet arrangement arranged on the rotor comprises magnets, in particular permanent magnets.

[0047] For example, the magnetic body of the magnetized magnet or the magnet suitable for magnetizing the rotor lamination stack consists of AlNiCo, bismuth-manganese magnet (that is, an alloy consisting of bismuth, manganese and iron), of ferrite (for example, hard ferrite, for example based on barium, strontium), of neodymium iron boron (NdFeB) (advantageously neodymium iron boron with an addition of dysprosium), of samarium cobalt (SmCo) (advantageously samarium cobalt with an iron content of 20 to 25%, for example SmCo 5 、Sm 2 Co 17 、Sm(Co,Cu,Fe,Zr) z , or the like. Rare earth magnets or plastic magnets are also feasible. In addition, aluminum nickel cobalt alloys, platinum cobalt alloys, copper nickel iron and copper nickel cobalt alloys, iron cobalt chromium alloys, martensitic steel or manganese aluminum carbon alloys are suitable for the magnetic body.

[0048] The drive motor is preferably a brushless motor or an electronically commutated motor. It is particularly advantageous if a corresponding stator of the drive motor has permanent magnets or is excited by permanent magnets.

[0049] The lamination stack of the rotor and / or the stator is preferably produced from layered electronic or transformer laminations.

[0050] Suitably, the stator of the drive motor comprises a carrier made of plastic, in particular polyamide. The carrier is manufactured, for example, by casting and / or surrounding injection molding of the stator lamination stack. It is also feasible that the carrier comprises one or more plug-in bodies or plug-in carriers, which are plugged into the lamination stack. For example, such a plug-in carrier can be plugged into one or both end sides of the lamination stack. The carrier preferably covers the lamination stack in the region of the rotor receptacle and / or in the region of one or both end sides of the lamination stack. Supports, support protrusions, winding heads and the like are preferably provided at the carrier to accommodate the coil conductors of the excitation coil assembly. In addition, the carrier preferably has an electrical connection contact or a connection mechanism for connecting a connection line, by means of which the drive motor is connected or can be connected to the current-carrying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Next, embodiments of the present invention will be explained with reference to the accompanying drawings.

[0052] Figure 1 A perspective oblique illustration of a system of two electric drive motors and a handheld machine tool having the drive motors,

[0053] Figure 2 Show according to Figure 1 A side view of a drive motor of a system, wherein the

[0054] Figure 3 In the figure, Figure 2 The section view of the cutting line AA in

[0055] Figure 4 Shown by Figure 1 Another drive motor of the system is approximately along the corresponding Figure 2 The same section line AA of the cross-sectional view,

[0056] Figure 5 A perspective diagram showing the Figure 4 The insulating sleeve of the drive motor,

[0057] Figure 6 Show according to Figure 4 A perspective illustration of the rotor of a drive motor,

[0058] Figure 7 Shown by Figure 6 The rotor, when manufactured, is approximately along the Figure 6 The section diagram of the section line BB in

[0059] Figure 8 It is shown that approximately Figure 7 , in which, however, the motor shaft is fully inserted into the rotor lamination stack,

[0060] Fig. 9 Shown from Figure 8 Details of D1,

[0061] Fig.10 Showing the direction according to Figure 1 A perspective oblique view of the stator of Figure 1 The local D2 in

[0062] Fig.11 Shows the cross section along the cutting line CC according to Fig.10 A cross-sectional view of a stator for illustrating a coupling mechanism, wherein the coupling mechanism is

[0063] Fig.12 in the sideways in the open position and in

[0064] Fig.13 is shown in the closed state from the side,

[0065] Fig.14 Show according to Fig.12 A perspective illustration of the coupling mechanism, and

[0066] Fig.15 Show according to Fig.13 A perspective illustration of the coupling mechanism,

[0067] Fig.16 A perspective oblique view is shown in a perspective oblique illustration for illustrating the Figures 10 to 14 The assembly and processing of the connecting mechanism of the welding tongs is approximately the same as that of the welding tongs. Fig.10 ,

[0068] Fig.17 Shown approximately along the section line DD through the Fig.16 A cross-sectional view of an assembly of

[0069] Fig.18 Show according to Fig.17 The picture, however, has the welding jaws arms moving relative to each other,

[0070] Fig.19 Show according to Figure 1 A portion D3 of a stator having a slot covering portion, wherein the slot covering portion is

[0071] Fig. 20 In the figure, the

[0072] Fig.21 Shown from Fig.19 The groove covering part is Fig.17 Detail D4 during assembly into the stator slots,

[0073] Fig. 22 Detail D4 is shown, however, with a slot cover that is further adjusted into the stator slot, and

[0074] Fig.23 Detail D4 showing the slot cover with the finished assembly,

[0075] Fig. 23B An alternative embodiment of the groove cover and the groove is shown, which corresponds approximately to the embodiment according to Fig.23 View,

[0076] Fig.24 Shown for manufacturing according to Fig.19 The groove cover part and assemble it according to Figures 21 to 23 Schematic illustration of the assembly device at the stator,

[0077] Fig.25A perspective oblique view of a detail of the rotor of the aforementioned motor is shown, corresponding approximately to the position shown in FIG. Figure 6 The local D5 in

[0078] Fig.26 A schematic illustration of a balancing mechanism for balancing a rotor according to the previous figures, and

[0079] Fig. 27 A schematic front view of a rotor with a magnetization device according to the previous figures is shown. DETAILED DESCRIPTION

[0080] Figure 1 A system diagram is shown, comprising a hand-held machine tool 300, for example a sawing machine, wherein a drive motor 20 drives a tool holder 301 for a working tool, for example directly or via a transmission mechanism not visible in the drawing. A working tool 302, for example a separating tool, a sawing tool or the like, is arranged or can be arranged at the tool holder 301. The drive motor 20 is accommodated in a housing 303 of the machine tool 300 and can be switched on and off by means of a switching element 304. The speed of the drive motor 20 can preferably also be adjusted by means of the switching element 304.

[0081] For the power supply of the handheld machine tool 300, the connecting cable 305 is used to connect to the energy supply network EV. The energy supply network EV provides a supply voltage P1, for example, 110V AC voltage, 230V AC voltage or the like. The handheld machine tool 300 can have a current supply device 306 connected between the switching element 304 and the drive motor 20.

[0082] The drive motor 20 can also be provided for operating the suction device 400 , in particular for driving a suction turbine of the suction device 400 . The suction device 400 has the drive motor 20 and can be connected to an energy supply network EV, for example, by means of a connecting cable 405 .

[0083] In any case, voltage P1 is significantly greater, for example at least four to five times greater, than voltage P2, which is provided by energy storage device 205 of handheld machine tool 200. Voltage P2 is, for example, a DC voltage of 14 V, 18 V or the like.

[0084] The handheld machine tool 200 is, for example, a screwing machine, a drilling machine or the like. A drive motor 120 is accommodated in a housing 203 of the handheld machine tool 200, and the drive motor is suitable for a relatively low voltage P2. The drive motor 120 is energized by a current supply mechanism 206, which is supplied with electrical energy through an energy storage device 205. The drive motor 120 drives a tool receiving portion 201 for a working tool 202, such as a drilling tool or a screwing tool, directly or through a transmission mechanism 208. The current supply mechanism 206 can be switched on, off and / or designed to adjust the rotational speed of the drive motor 120 through a switching member 204.

[0085] The drive motors 20 , 120 have some identical or similar components.

[0086] For example, the motor shafts 30 and 130, which can be optionally used in the drive motors 20 and 120, respectively have bearing sections 31 and 32, between which a holding section 33 is arranged. The bearing section 32 is located next to the driven section 34, which is used to drive the tool holder 201 or 301. A gear can be arranged or can be arranged on the driven section 34, for example. Alternatively, there is a toothing 35 as described in the case of the motor shaft 130. The holding section 33 preferably has a positive-fitting contour 36, which extends between flat sections 37, that is, sections without a positive-fitting contour.

[0087] The form-fitting contour 36 comprises, for example, grooves and / or projections 36A which extend parallel to the longitudinal axis L of the motor shaft 30 . However, grooves, honeycomb-like structures or the like can also be provided as the form-fitting contour 36 .

[0088] The positive-fit contour 136 of the motor shaft 130 comprises, for example, a positive-fit projection 136A inclined to the longitudinal axis L. However, the positive-fit projection 136A has a slight inclination, for example between 5 and 15 degrees, so that the positive-fit projection 136A runs essentially parallel to the longitudinal axis L.

[0089] The positive-fit contour portion 36 , 136 forms, for example, a positive-fit contour 36B, 136B.

[0090] The output section 34 can be provided for driving a fan wheel. For example, a fan wheel fastening 38 is provided on the motor shaft 130 , which is arranged, for example, between the toothing 35 and the bearing section 32 .

[0091] The motor shaft 30 or 130 is connected rotationally fixedly to the lamination stack 41 or 141 of the rotor 40, 140. The lamination stack 41, 141 has laminations 43 arranged next to one another in a row arrangement transversely to the longitudinal axis L, for example electronic or transformer laminations of a type known per se.

[0092] The lamination stack 41, 141 has a shaft through-opening 42, 142, which has different diameters. The shaft through-opening 42 has a larger diameter than the shaft through-opening 142. The motor shaft 30 or 130 can be inserted into the shaft through-opening 42 by means of an insulating sleeve 60, while the motor shaft 30 or 130 can be directly inserted into the shaft through-opening 142, that is, without the need for an insulating sleeve or other similar objects.

[0093] The insulating sleeve 60 forms an insulating body 60A, by means of which the laminated core 41 is electrically insulated from the motor shaft 30 or 130 which respectively carries the laminated core.

[0094] The magnet assembly 50 is arranged on the lamination stack 41 and 141. The lamination stack 41 or 141 has a holding receptacle 45 for the magnet 50 of the magnet assembly 50. For example, four holding receptacles 45 and associated magnets 51 are provided, so that the rotor 40, 140 forms four magnetic poles in total. The magnet 51 is, for example, a permanent magnet.

[0095] The magnet 51 has a plate-shaped outer shape, for example. The magnet 51 is, for example, a magnet plate or a plate-shaped body 56. Accordingly, the holding receptacle 45 is suitable for accommodating a plate-shaped, that is, a flat, right-angled, cubic plate-shaped body or a magnet plate and has a corresponding inner peripheral contour.

[0096] The holding receptacle 45 and the magnet 51 extend parallel to the longitudinal axis L of the motor shaft 30 , 130 or parallel to the rotation axis D of the motor 20 , 120 .

[0097] Furthermore, the rotor 40 , in particular as a laminated core 41 , 141 , is penetrated by an air duct 46 which extends parallel to the longitudinal axis L of the motor shaft 30 , 130 and is open at the end face 44 of the rotor 40 , 140 , so that air can flow through the laminated core 41 , 141 .

[0098] Although the shaft passage opening 42, 142 has a substantially circular inner peripheral contour, it advantageously also has an anti-twist contour 47, in particular an anti-twist receptacle 47A. The anti-twist contour 47 is, for example, a longitudinal groove 47B which extends parallel to the rotation axis D or longitudinal axis L.

[0099] The two motor shafts 30 , 130 can each be inserted into a laminated core 41 , 141 .

[0100] In the case of a laminated core 141 whose shaft passage opening 142 has a smaller diameter than the shaft passage opening 42 of another laminated core 41 , the respective motor shaft 30 , 130 can be directly inserted, for example pressed into, into the shaft passage opening 142 .

[0101] The narrow sides or end sides of the laminations 43 which limit the inner circumference of the shaft through-opening 42 or protrude therein are advantageously gripped with the motor shaft 30, 130 so that they are received in the lamination stack 141 in a non-displaceable manner in a force direction parallel to the axis of rotation D or parallel to its longitudinal axis L. Although there is direct contact between the lamination stack 141 and the motor shaft 30, 130, electrical conductivity of the lamination stack 141 and the motor shaft 30, 130, which is preferably made of metal, is also possible because the rotor 140 is provided for use with the drive motor 120 and therefore for a lower voltage P2.

[0102] In the rotor 40 , however, insulation measures are provided so that electrical safety is provided despite the electrical conductivity of the motor shaft 30 , 130 and the associated laminated core 41 .

[0103] That is, the motor shaft 30, 130 is accommodated in the laminated core 41 by means of the insulating sleeve 60. The insulating sleeve 60 forms, so to speak, a protective sheath or an outer sheath of the motor shaft 30, 130 in the section accommodated in the shaft through-opening 42.

[0104] The insulating sleeve 60 has between its longitudinal ends 61 , 62 a tube section 63 which is arranged in a sandwich-like manner between the laminated core 41 and the motor shaft 30 , 130 and which is electrically insulated from the laminated core 41 .

[0105] The tube section 63 has a plug-in receptacle 64 for inserting the motor shaft 30, 130, which extends from the longitudinal end 61 to the longitudinal end 62. In the region of the longitudinal end 61, the plug-in receptacle 64 has an insertion opening 64A, through which the motor shaft 30 can be inserted into the plug-in receptacle 64. The motor shaft 30 exits the plug-in receptacle 64 at an exit opening 64B.

[0106] In the region of the longitudinal end 61, that is, in the longitudinal end region 61A, the plug-in receptacle 64 has a larger diameter W1 and thus a larger internal cross section WQ1 than in the region of the longitudinal end 62 (that is, in the longitudinal end region 62A), in which there is a smaller diameter W2 and thus a smaller internal cross section WQ2. For example, the diameter of the motor shaft 30, 130 in the region of the longitudinal ends 61, 62 is approximately 10 mm. In contrast, before the motor shaft 30, 130 is inserted into the plug-in receptacle 64, the diameter W2 is approximately 0.2 mm to 0.3 mm smaller than the diameter W1. That is, when the motor shaft 30, 130 is inserted as in Figure 7 When the insulating sleeve 60 is inserted along the plug axis S from the longitudinal end 61 to the longitudinal end 62 as described in , it first penetrates slightly or with a lateral play with respect to the plug axis S into the insertion opening 64A at the longitudinal end 61, where the plug receptacle 64 has a diameter W1. The diameter W1 is advantageously approximately greater than the diameter of the motor shaft 30, 130 at its free longitudinal end provided for insertion into the plug receptacle 64. The region of the insertion opening 64A forms a centering section in which the motor shaft 30, 130 is centered with respect to the insulating sleeve 60 or the axis of rotation D. For example, the motor shaft 30 has the same outer cross section or outer diameter both in the region of the diameter W1 and in the region of the diameter W2.

[0107] Alternatively or additionally, it is possible, for example, that the motor shaft 30 has a first external cross section AQ1 and a second external cross section AQ2, which are assigned to the longitudinal ends 61, 62 of the plug-in receptacle 64, wherein the first external cross section AQ1 is smaller than the second external cross section AQ2. In this embodiment of the motor shaft 30, it is also possible that the diameters W1 and W2 of the plug-in receptacle 64 and thus the internal cross section are equal or approximately equal in the region of the longitudinal ends 61 and 62.

[0108] Between the longitudinal ends 61, 62, the plug-in receptacle 64 preferably becomes narrower continuously from the diameter W1 to the diameter W2. However, it is also possible that there is at least one step between the diameter W1 and the diameter W2. Advantageously, the plug-in receptacle 64 has a plug-in cone which becomes narrower from the longitudinal end 61 to the longitudinal end 62.

[0109] An introduction ramp 65 , for example an introduction cone, is advantageously provided at the longitudinal end 61 in order to facilitate the insertion of the motor shaft 30 , 130 into the plug receptacle 64 .

[0110] When the motor shaft 30 , 130 is inserted into the plug receptacle 64 along the plug axis S, it is pressed further forward in the direction of the longitudinal end 62 , widening, so to speak, the tube section 63 which becomes narrower towards the longitudinal end 62 .

[0111] The assembly is designed as follows:

[0112] First, the insulating sleeve 60 is inserted into the shaft through-opening 42 of the laminated core 41 .

[0113] Advantageously, provision is made for the plug-in cross section or inner cross section of the shaft through-opening 42 to be equal or approximately equal over its entire length provided for the insertion of the insulating sleeve 60 .

[0114] However, it is also possible that the shaft through-opening 42 has a larger inner cross section at the longitudinal end region 41A provided for the insertion of the insulating sleeve 60 than at the longitudinal end region 41B opposite thereto.

[0115] The motor shaft 30, 130 is then inserted into the plug receptacle 64. As a result, the motor shaft 30, 130 presses the radial outer periphery of the tube section 64 in the direction of the radial inner periphery of the shaft through-opening 42 when it is inserted into the plug receptacle 64 along the plug axis S. The laminations 43 preferably penetrate into the peripheral wall 66 in a toothed manner with their narrow sides facing the shaft through-opening 42.

[0116] The plug-in receptacle 64 has a narrower diameter W2 until the region upstream of the laminated core 41, so that when the motor shaft 30, 130 reaches this region of the plug-in receptacle 64, the peripheral wall 66 of the tube section 63 widens radially outward with respect to the plug-in axis S and thus, so to speak, stretches the tube or the tube section 63. Thus, a form-fitting section 75 with a step 67 is formed at the outer periphery of the peripheral wall 63, which directly engages or grips the end face 44 of the laminated core 41. That is, the step 63 holds the insulating sleeve 60 on the laminated core 41 with a force direction opposite to the plug-in direction in which the motor shaft 30, 130 can be inserted into the plug-in receptacle 64.

[0117] At the other longitudinal end region, namely at the longitudinal end 61 , the insulating sleeve 63 has a flange body 68 which projects radially outwardly in front of the tube section 63 with respect to the plug-in axis S or the longitudinal axis L.

[0118] The flange body 68 forms a longitudinal stop 68A with respect to the plug-in axis S and is supported, for example, in the region of the longitudinal end 61 at the end side 44 of the laminated core 41. The flange body 68 has, for example, reinforcing ribs 69 which extend from its radial outer circumference in the direction of the plug-in receptacle 64, that is to say radially inwardly towards the plug-in axis S. The reinforcing ribs 69 are arranged, for example, at the end side 71 of the flange body 68 facing away from the laminated core 41.

[0119] Furthermore, a support stop 70 for the motor shaft 30, 130 is provided at the insertion opening 64A, at which a support stop 39, for example a stepped support stop 39, of the motor shaft 30, 130 can be stopped in a force direction parallel to the plug axis S. The support stop 70 is formed, for example, by a step between an end face 71 of the insulating sleeve 60 and the plug receptacle.

[0120] In the region of the longitudinal end 62 or at the exit opening 64B, the insulating sleeve 60 preferably has a smaller outer circumference or diameter than in the region of the longitudinal end 61. For example, an introduction ramp 72 is provided at the longitudinal end 62, which facilitates the insertion of the insulating sleeve 60 into the shaft through-opening 42 of the laminated core 41. The longitudinal end 62 is designed, for example, as a plug-in projection.

[0121] Preferably, the insulating sleeve 60 projects at the longitudinal end 62 with a tube section 73 forming an insulating section 76 in front of the end face 44 of the laminated core 41 , so that electrical insulation is provided here between the motor shaft 30 , 130 on the one hand and the laminated core 43 on the other hand.

[0122] On the other hand, at the other longitudinal end 61, the flange body 68, which, as it were, projects laterally or protrudes before the shaft passage 42, provides electrical insulation and also forms an insulating section 76. As a result, both in the region of the flange body 68 and in the tube section 73, an electrically insulating distance, such as air and electrical gap, of approximately 8 mm to 10 mm is obtained, which is suitable for electrical insulation with respect to the voltage P1.

[0123] An anti-twist contour 74 is preferably arranged at the radial outer periphery of the insulating sleeve 60, in particular over the entire longitudinal extension of the tube section 63, for engaging in the anti-twist contour 47 of the laminated core 41. The anti-twist contour 74 is designed, for example, as an anti-twist projection 74A, in particular as a longitudinal projection or longitudinal rib 74B, which extends parallel to the plug-in axis S or the rotation axis D.

[0124] The insulating sleeve 60 is received in a clamping seat or a pressing seat between the motor shaft 30 , 130 and the lamination stack 41 , thereby achieving a force fit.

[0125] Due to the anti-twist contours 47 , 74 , there is also a positive fit, by means of which the insulating sleeve 60 is held on the laminated core 41 in a positively locking manner with respect to and / or transversely to the axis of rotation D.

[0126] The positive-fitting contour 36, 136 of the motor shaft 30, 130 engages in a toothed manner in the inner circumference of the tube section 63, so that the motor shaft 30, 130 is also accommodated in the insulating sleeve 60 in a rotationally fixed manner about its rotation axis D or longitudinal axis L and / or in a displacement-proof manner about the rotation axis D or longitudinal axis L. The positive-fitting contour 36, 136 advantageously forms a counter-positive-fitting contour at the inner circumference of the tube section 36, that is, for example, the inner circumference of the tube section 63 is plastically deformed, so that the positive-fitting contour 36, 136 is in positive engagement with the counter-positive-fitting contour. The characteristics of the plastic deformation or the counter-positive-fitting contour are obtained or formed, for example, when the motor shaft 30, 130 is inserted into the insulating sleeve 60.

[0127] That is, the insulating sleeve 60 makes it possible that the motor shaft 30, 130, which can be directly inserted into the laminated core 141 without additional measures, can also be used together with the laminated core 41 without any problems. It is not necessary to design different motor shafts. Geometrically, the motor shafts 30, 130 are identical at the holding section 33, which is provided for connection to the laminated core 41 or 141. For example, the length and diameter of the holding section 33 are identical. However, it is possible to provide different surfaces and / or surface contours in the region of the holding section 33 of the motor shafts 30 and 130 in order to optimally hold the laminated core 41 or 141, respectively.

[0128] Preferably, the support projection 43A extending into the shaft through-opening 42 or 142 penetrates into the radial outer periphery of the tube section 63 of the insulating sleeve 60 or into the radial outer periphery of the retaining section 33 of the motor shaft 30, 130. For example, a positive fit portion 75A, that is, for example, a positive fit receiving portion 75B, is formed on the insulating sleeve 60, in which the support projection 43A engages (schematically in Figure 5 The radial outer circumference of the tube section 63 is pressed radially outwards, for example by the motor shaft 30 , with respect to the plug-in axis S or the rotation axis D, wherein the bearing projection 43A penetrates into the tube section 63 and preferably grips therein.

[0129] The support projections 43A are arranged, for example, at the end side of the lamination stack 43 facing the shaft through-opening 42 or 142. Between the support projections 43A, in particular between groups of support projections 43A, there is preferably a spacing, for example an angular spacing and / or a longitudinal spacing, with respect to the rotation axis D. The support projections 43A hold the insulating sleeve 60 in the shaft through-opening 42 or the motor shaft 30, 130 in the shaft through-opening 142 parallel to the rotation axis D and / or in the peripheral direction with respect to the rotation axis D. Preferably, a plurality of support projections 43A are arranged at angular spacings about the rotation axis D. The insulating sleeve 60 is pressed radially outward by the motor shaft 30 inserted therein, so that the support projections 43A penetrate, in particular clamp-like, into the outer periphery or the cover or the peripheral wall 66 of the insulating sleeve 60.

[0130] The rotor 40, 140 of the drive motor 20, 120 can be used together with a stator 80, which has an excitation coil assembly 86. The excitation coil assembly 86 can have excitation coils 87 of different designs, for example excitation coils 87 with more or fewer windings, with different conductor cross sections or the like, in order to adapt to different voltages P1 and P2 and / or current intensities of the current flowing through the excitation coil 87.

[0131] The stator 80 has a laminated core 81 with a rotor receptacle 82 designed as a through opening for the rotor 40, 140. The rotor 40, 140 is rotatably received in the rotor receptacle 82, wherein a narrow air gap between the laminated core 81 and the laminated core 41, 141 is present in a manner known per se.

[0132] The laminated core 81 has laminated cores 83, for example electronic or transformer laminated cores, whose plate planes extend transversely to the axis of rotation D of the drive motor 20, 120. The respective motor shaft 30, 130 projects in front of the end faces 84, 85 of the laminated core 81, where it is rotatably supported on the bearings 24, 25 of the bearing assembly 24A.

[0133] The bearing elements 24 , 25 are held on the bearing receptacle 23 by bearing element covers 21 , 22 which close the stator 80 at the end face.

[0134] The supports 24, 25 can be inserted, in particular pressed, into the support receptacles 23 of the support covers 21, 22. However, it is also possible for the supports 24, 25 to be injection-molded or cast around the material of the support covers 21, 22.

[0135] For example, the support cover 21 , 22 is fixedly connected to the laminated core 41 or to a carrier 90 that carries the laminated core 41 , for example, screwed, adhesively bonded or preferably welded.

[0136] The support cover 21, 22 and the carrier 90 are preferably made of plastic, in particular of thermoplastic plastic. Preferably, the same plastic, for example the same thermoplastic plastic, is used for the support cover 21, 22 and the carrier 90.

[0137] For example, the carrier body 90 is produced by an injection molding method, wherein the laminated core 81 is cast.

[0138] The carrier 90 has a bearing cover receptacle 91 for the bearing covers 21 , 22 . For example, the peripheral wall 26 of the bearing covers 21 , 22 , for example with its end face, can be inserted into the bearing cover receptacle 91 .

[0139] The bearing cover 21 is arranged closer to the driven section 34 of the motor shaft 30, 130. The bearing cover 22 is arranged in an area away from it. The bearing covers 21, 22 close the laminated core 81 at the longitudinal end areas opposite to each other. Compared with the bearing cover 22, the bearing cover 21 does not protrude too far in front of the end side of the laminated core 41, 141. The bearing cover 21 has a receiving space 21A for the flange body 68.

[0140] The support element 24 is closer to the laminated core 41 , 81 , which can carry electrical current, than the support element 25 .

[0141] However, the bearing part 24 and the bearing part 25 are electrically conductively connected to the bearing section 31 and thus to the motor shaft 30 , 130 , so that there is the risk that voltage will jump from the excitation coil arrangement 86 to the motor shaft 30 , 130 .

[0142] However, the electrically insulating flange body 68 provides a sufficient electrical insulation distance so that this risk no longer exists.

[0143] On the other hand, the support part 25 has a greater longitudinal distance with respect to the end face of the laminated core 41, 81 with respect to the axis of rotation D, so that here too there is no risk of arcing from, for example, the field coil assembly 86 to the motor shaft 30, 130 in the region of the support part 25. Furthermore, the electrically insulating tube section 73 of the insulating sleeve 60, which projects in front of the laminated core 41 in the direction of the support part cover 22, ensures sufficient electrical insulation.

[0144] The coil conductor 88 of the excitation coil 87 runs through a slot 89 in the laminated core 81, which is arranged, for example, parallel to the axis of rotation D or inclined thereto. The slot 89 has an introduction opening 89D, which is open relative to the inner circumference 82A of the rotor receptacle 82. The slot 89 extends between the end sides 84, 85. Through the introduction opening 89D, the coil conductor 88 can be introduced into the slot 89 and, for example, wound around a winding head or a winding hammer of the laminated core 81.

[0145] Although the section of the laminated core 81 facing the rotor receptacle 82 of the stator 80 which is located between the slots 89 is covered by an inner lining 92 , for example by injection molding with plastic, the slots 89 are initially open so that the coil conductors 88 can be inserted therein.

[0146] Furthermore, the field coil 87 is wound around a support projection 93 at the end side 84 of the stator 80 , which forms, so to speak, a winding head.

[0147] A supporting projection 94 is provided at the opposite end side 85 , which supporting projection is likewise suitable for being wound with a coil conductor of an excitation coil, but in some embodiments is not wound.

[0148] The end face 85 represents, so to speak, the connection side of the drive motor 20, 120. Here, an electrical connection means 100 is provided, to which, for example, a connection line 15 is connected or can be connected for electrical connection to the current supply means 206, 306. The connection line 15 has a plug connector for plugging into the current supply means 206, 306. The connection means 100 can also be referred to as a terminal.

[0149] The connection line 15 can be plugged into the connection means 100 or can also be directly welded thereto, for example. The connection means 100 has, for example, a connection contact region 101 designed as a contact projection, to which a connection plug connected to the connection line can be plugged. Furthermore, holes 102 are provided at the connection contact region 101, through which, for example, connection conductors of the connection line 15 can be guided and welded or electrically connected to the connection means 100 in another way. For example, welding of such a connection conductor to the connection means 100 would also be possible without any problems.

[0150] The coupling mechanism 100 can be arranged on the carrier 90 by means of plug-in assembly. The carrier 90 has a holder 95 for the coupling mechanism 100. The holder 95 comprises a plug-in receptacle 96 into which the coupling mechanism can be inserted. The plug-in receptacle 96 is arranged between receiving projections 97 which protrude in front of the end face 85 of the carrier 90. For example, the receiving projections 97 have mutually opposite grooves 98 into which plug-in projections 104 which protrude laterally in front of the coupling mechanism 100 can be inserted, for example in the manner of a groove-spring connection.

[0151] The plug-in projection 104 projects laterally in front of the base 103 of the corresponding coupling mechanism 100. The plug-in projection 103 projects in front of the base 103 transversely to the longitudinal extension of the connection contact area 101. The plug-in projection 104 and the connection contact area 101 form an approximately T-shaped configuration as a whole. For example, the base 104 can be said to form a base foot, from which the plug-in projection 104 projects laterally in the manner of a lateral foot. However, the base surface of the plug-in projection 104 and the base surface of the base 103 are different. A transition section 106, for example, which is S-shaped or has a bend or arc section opposite to each other, is provided between the base 103 and the plug-in projection 104. Therefore, that is to say, the plug-in projection 104 projects in front of the back side 115 of the base 103.

[0152] At the free end region protruding in front of the base body 103, the plug projection 104 has a positive-fitting contour 105, in particular a toothing 105A, a barb or the like, by means of which it can be held in a positive-fitting manner in the plug receptacle 96. Preferably, the plug projection 104 can be gripped, as it were, in the plug receptacle 96 of the carrier 90 by means of the positive-fitting contour 105. In particular, welding of the carrier 90 in the region of the plug receptacle 96, in particular in the region of the groove 98, when the coupling mechanism 100 is heated (which will be described later), results in a positive-fitting connection being established between the plug projection 104, in particular its positive-fitting contour 105, on the one hand, and the material of the carrier 90 in the region of the plug receptacle 96, in particular in the region of the groove 98, on the other hand.

[0153] The toothing 105A has, for example, an overlap, ie, for example, the teeth 105B project in front of the plug-in projection 104 transversely to the main plane thereof.

[0154] The coupling mechanism 100 has a conductor receptacle 107 for receiving the corresponding section of the coil conductor 88 to be connected. The conductor receptacle 107 is formed between the front side 114 of the base body 103 on the one hand and the receiving arm 108 of the coupling mechanism 100 on the other hand, which is connected to the base body 103 by means of a connecting section 109. It is particularly advantageous if the base body 103, the connecting section 109 and the receiving arm 108 are integral. The lateral legs or plug-in projections 104 of the base body 103 are also preferably integral with them. The inner side of the connecting section 109 facing the conductor receptacle 107 forms a receiving section or receiving cavity 116A of the conductor receptacle 107.

[0155] The conductor receiving portion 107 has a supporting surface 107A and a narrow side 107B at an angle thereto in the region of the receiving cavity 116A. An inclined surface 107C inclined relative to the supporting surface 107A and relative to the narrow side 107B is arranged between the narrow side 107B and the large supporting surface 107A to support at least one coil conductor 88. The inclined surface 107C can be, for example, a chamfered, curved or arcuate surface or a similar structure. In any case, the inclined surface 107C prevents the coil conductor 88 from being placed flat on a sharp edge.

[0156] Advantageously, the coupling means 100 is designed as a stamped and bent part which is first stamped out of a base material and then brought into the previously described outer shape by corresponding shaping.

[0157] The installation and / or fixing and / or electrical contacting of the coil conductor 88 in the conductor receptacle 107 is designed as follows:

[0158] Firstly, the conductor receptacle 107 is open in that the receptacle arms 108 still protrude far from the base body 103, see for example Fig.12 and 14 In this case, the coil conductor 88 can reach as far as the bottom 116 of the conductor receptacle 107 , that is to say, as far as the inner circumference of the connecting section 109 , see for example Fig.12 Rather, however, this configuration is undesirable so that the coil conductor 88 is held in a position remote from the bottom 116 of the conductor receptacle 107 by additional supporting measures, for example by the support element 251 of the mounting device 250 .

[0159] However, it is preferred that the following configuration is adopted, that is, the carrier body 90 has a supporting contour 99, on which the coil conductor 88 is supported when the coupling mechanism 100 is assembled or closed, see Fig.10 and 11 That is, the coil conductor 88 lies flat on the support contour 99 so that it does not touch the bottom 116. The support contour 99 is, for example, arranged on the outer side of the receiving projection 97 facing away from the groove 98. For example, the support contour 99 is designed as a step between the corresponding receiving projection 97 and the part of the carrier 90 from which the receiving projection 97 protrudes.

[0160] The position of the coil conductor 88 raised from the bottom 116 is advantageous for the subsequent closing and welding operation. This is particularly true when using a coil conductor with a small cross section, such as the coil conductor 88B ( Fig.11Even when the receiving arm 108 is moved toward the base body 103, the coil conductor 88B can be spaced apart from the base 116, which is heated significantly during the welding process described below, so that it rests with its free end 113 on the front side 114 of the base body 103.

[0161] The coil conductor 88B forms, for example, a component of the field coil 87B of the field coil assembly 86B.

[0162] The receiving arm 108 has a closing leg 111 at its end region facing away from the connecting section 109, which protrudes at an angle from a central arm section 110 of the receiving arm 108. For example, a bending section or connecting section 112 is arranged between the central arm section 110 and the closing leg 111. The closing leg 111 protrudes from the central arm section 110 in the direction of the front side 114 of the base body 103, so that its free end 113 touches the front side 114 in the closed state of the conductor receptacle 107, while there is a spacing between the central arm section 110 and the front side 114 of the base body 103, which spacing delimits the conductor receptacle 107.

[0163] The welding tongs 252 of the assembly device 250 are used for closing and welding the coupling 100. The welding tongs 252 have tongs arms 253, 255, at whose free end regions, which are provided for contacting the coupling 100, supporting surfaces 254, 256 are provided. The free end regions of the tongs arms 253, 255, which are provided for engaging with the coupling 100, taper to a point, that is, form a tip 257. This pointed, thin design of the tongs arms 253 is particularly advantageous in the case of the tongs arms 253, which support the back side 115 of the coupling 100 with their supporting surfaces 254.

[0164] The pliers arms 253 , 254 are arranged in a V-shape so that the tips 257 of the opposite sides act on the coupling mechanism 100 (see Fig.16 ), the connecting mechanism is closed and then welded.

[0165] Preferably, the longitudinal axes L1, L2 of the pliers arms 253, 255 extend at an angle W, in particular at an angle of approximately 20° to 40°. As a result, in particular the tip 257 of the pliers arm 253 can reach into the intermediate space between the support cover 22 and the back side 115 of the coupling 100 and support the base body 103 there with its support surface 254.

[0166] The clamp arm 254 acts on the receiving arm 108 in the sense of closing the conductor receiving portion 107. For example, the bent section 112 comes into contact with the support surface 256 of the clamp arm 255. When the support surface 254 moves toward the support surface 256, the support surfaces 254, 256 are oriented parallel or substantially parallel to each other, which is shown as a feed movement VS in the figure. Thus, that is, the clamp arm 253 remains fixed in position and supports the coupling device 100 on the back, while the clamp arm 255 moves the receiving arm 108 in the direction of the base body 103. The free end 113 of its closing leg 111 then comes into contact with the front side 114 of the base body 103 of the coupling device 100. Thus, that is, the conductor receiving portion 107 is then closed and the receiving eye 119A is formed.

[0167] It is also possible for the welding tongs or another similar milling mechanism to shape the receiving arm 108 from an initially longitudinally extending, rectilinear shape (in which, for example, the closing foot 111 is not yet formed) into a receiving arm 108 having a closing foot 111, for example by means of the schematically illustrated deformation contour 259 on the tongs arm 255.

[0168] The pliers arms 253 , 255 are then supplied with current via the current supply device 258 , in such a way that the pliers arms 253 , 255 assume different electrical potentials and thus a current flow occurs through the coupling device 100 .

[0169] The welding current IS flows through the connection means 100 which is closed in an annular manner, that is, through the part of the connection means 100 which closes the conductor receptacle 107, namely the base body 103 and the receiving arms 108 in the region of the conductor receptacle 107. In this case, the welding current IS flows through the connection regions 118 and 119, namely, on the one hand, through the connection section 109, and on the other hand, but also through the contact region 117 between the free end 113 of the closing leg 111 and the front side 114 of the base body 103. A large amount of heat is generated both in the contact region 117 and in the region of the base 116, which heat, however, does not damage the coil conductor 88 or 88B, since the coil conductor is at a distance from the base 116, but also from the upper contact region 117. Nevertheless, the connection means 100 is so hot in the region of the conductor receptacle 107 that the lacquer or similar other insulation of the coil conductor 88 melts and it comes into electrical contact with the surface of the connection means 100.

[0170] That is to say, the coupling 100 is thus mechanically closed, so to speak, and then welded to the coil conductor 88 accommodated in the conductor receptacle 107. The assembly is economical for the coil conductor 88 on the one hand, but can also be reliably and permanently loaded on the other hand, because the coil conductor 88 can be slightly mechanically modified by the above-mentioned pressing and welding processes, but it is not weakened or modified in its cross-sectional geometry to the extent that it breaks, for example, when the drive motor 20, 120 is operated.

[0171] When the field coil 87 is inserted into the groove 89 , it is closed by the groove cover 180 .

[0172] The slot cover 180 has a profile body 181. Preferably, the slot cover 180 is made of plastic and / or an electrically insulating material. The profile body 181 is designed, for example, as a plastic part or a plastic wall.

[0173] The profile body 181 forms a wall 182 which, as it were, represents a closing wall for the respective groove 89 .

[0174] The slot cover 180 or the profile body 181 has a longitudinal profile and extends along a longitudinal axis L8, which runs parallel to the longitudinal axis L9 of the slot 89 when the slot cover 180 is installed in the slot 89. The longitudinal narrow side or longitudinal side 195 of the slot cover 180 extends along the longitudinal axis L8. The longitudinal side 195 has a transverse spacing Q transverse to the longitudinal axis L8.

[0175] The longitudinal end region 183 of the slot cover 180 preferably projects in front of the laminated core 81 as far as the carrier 90, thereby providing electrical insulation over the entire length of the slot 89. Here, for example, adhesive bonding, welding or similar other fixing methods at one or both of the support cover 21 or 22 are advantageous.

[0176] The slot cover 181 has a wall section 184 which completely covers the slot 88 transversely to the longitudinal axis L8. The wall section 184 is approximately U-shaped or arc-shaped in cross section (that is, transversely to the longitudinal axis L8) and forms a positive-fitting projection 186 at its transverse end region (that is, transversely to the longitudinal axis L8), which is provided for engaging in a positive-fitting receptacle 89B of the slot 89. Transversely to the longitudinal axis L8, the slot cover 180 has two positive-fitting receptacles 186 which form the sections of the slot cover 180 which protrude the furthest transversely to the longitudinal axis L8 and / or are located opposite one another. The positive-fitting projection 186 and the positive-fitting receptacles 89B form a positive-fitting contour 185, 89A which holds the slot cover 180 in the slot 89 transversely to the longitudinal axis L8, which at the same time represents the longitudinal axis of the slot 89.

[0177] The wall section 184 has a cup-shaped outer shape between the positive-fitting contours 185, that is, has a bottom 187. The bottom 187 is raised, for example, into the corresponding groove 89, that is, extends into it. Of course, the opposite configuration is also possible, in which the wall section 184 does not protrude radially outwardly, but radially inwardly with respect to the rotation axis D. Here, however, it would be possible to hinder the rotor 40, 140.

[0178] The lateral legs 188 extend away from the wall section 184. The lateral legs 188 lean toward each other, that is, their free end regions away from the wall section 184 lean toward each other. Thus, the lateral legs 188 and the wall section 184 form a V-shaped form-fitting contour 185 in the transition region to the lateral legs 188, that is, a form-fitting projection 186, in a side view.

[0179] The assembly of the groove cover 180 is designed as follows:

[0180] Although, it is also possible to push the slot cover 180, for example, here from one of the end sides 84 or 85 into the corresponding slot 89, that is, along the plug-in axis running parallel to the rotation axis D. However, the form-fitting contours 185 can be moved toward each other transversely to the longitudinal axis L8, so that the lateral spacing Q between the form-fitting contours 185 can be reduced, so that the slot cover 180 can be displaced past the side 89C of the slot 89 into the slot 89, see Figures 21 to 23 Here, the wall section 184 slides with its rounded outer side 189 (that is, on its side opposite the bottom 187, which in this respect forms the pressing contour 189A) over the side edge 89C, wherein the wall section 184 yields in a flexibly flexibly manner, in this respect, that is, forms a flexibly flexibly flexibly section 194. Here, the lateral legs 188 and the form-fitting contour 185 move toward each other in the sense of narrowing the transverse spacing Q and finally snap the groove cover 180 into the groove 89 at the end of the plug-in movement SB, that is, the form-fitting contour 185 comes into engagement with the form-fitting contour 89A.

[0181] The groove cover 180 is then received in the groove 89 in a form-fitting manner, namely in two mutually orthogonal directions transversely to the longitudinal axis L8 .

[0182] The surface of the positive-fitting receptacle 89B facing away from the rotor receptacle 82 forms a rear gripping contour 89E. The surface of the positive-fitting receptacle 89B facing toward the rotor receptacle 82 forms a supporting contour 89F.

[0183] Preferably, the rear gripping profile 89E and / or the support profile 89F are planar.

[0184] Preferably, the rear gripping contour 89E and / or the supporting contour 89F supports the slot cover 180 over its entire longitudinal axis L8.

[0185] The lateral foot 188 has a rear gripping surface 188A, which is supported on the rear gripping contour 89E. The section of the wall section 184 adjacent to the lateral foot 188 has or forms a support surface 188B, which is supported on the support contour 89F. Thus, the rear gripping contour 89A supports the groove cover 180 in the direction toward the interior of the rotor receptacle 82 or in the direction of the axis of rotation D, and the support contour 89F supports it in the opposite direction, that is, in the radially outward direction with respect to the axis of rotation D or the bottom of the respective groove 89.

[0186] The advantages of the described construction method also result from the fact that, when the groove cover 180 is mounted, the carrier 90 can protrude slightly radially inwards in the direction of the rotor receptacle 82, for example, at the longitudinal end region of the groove 89. That is, its longitudinal end region 183 can then be brought into the rear grip in the direction of the rotor receptacle 82 of the protruding section of the carrier 90.

[0187] Furthermore, rear grip surface 188A and rear grip contour 89E as well as support surface 188B and support contour 89F bear flat against one another, so that a seal of sealing seat or groove 89 is achieved and / or groove cover 180 seals groove 89 in a sealing manner.

[0188] Advantageously, the slot cover 180 has a sealing function for sealing the slot 89, but has no supporting function for the excitation coil 87 of the excitation coil assembly 86. Rather, the rear gripping contour 89E and the inclined tendency of the rear gripping surface 188A even act in the sense of a disengagement ramp, which, when the slot cover 180 is loaded with force, causes a deformation or narrowing of the slot cover 180 in the direction out of the slot 89 or in the radially inward direction with respect to the rotation axis D and thereby enables or facilitates its disengagement from the slot 89.

[0189] according to Fig. 23B An alternative embodiment of the invention, which is shown only schematically, is provided with a groove 489, which is designed as an alternative to the groove 89, into which the groove cover 480 is inserted. The groove cover 480 has a positive-fitting receptacle 486 on its longitudinal narrow side, which is in engagement with a positive-fitting projection 489B of the groove 489. The positive-fitting projections 489B are opposite each other. The positive-fitting receptacle 486 and the positive-fitting projection 489B complement each other, for example, in a V-shaped manner.

[0190] The face of the form-fitting projection 489B facing away from the rotor receptacle 82 forms a rear gripping contour 489E. The face of the form-fitting projection 489B facing the rotor receptacle 82 forms a support contour 489F. The rear gripping contour 489E and / or the support contour 489F are preferably planar. Preferably, the rear gripping contour 489E and / or the support contour 489F support the slot cover 480 over its entire longitudinal axis L8. The longitudinal side of the slot cover 480 or the form-fitting receptacle 486 has a rear gripping surface 488A, which is supported at the rear gripping contour 489E. The form-fitting receptacle 486 also has a support surface 488B or forms the support surface, which is supported at the support contour 489F.

[0191] The mechanical structure of the stator 80 is preferably completely or partially identical for the two voltage levels P1 and P2. In particular, the rotor receptacles 82 for the rotors 40, 140 are identical, that is, have, for example, equal diameters. The design of the slots 89, that is, for example, their form-fitting contours 89A and / or their width and / or depth are also identical. It is also advantageous that the slot cover 180 is designed and / or arranged at the stator 80 independently of the excitation coil assembly 86 for application or application for the voltage P1 or the voltage P2. As a result, the principle of universal parts can be implemented to a large extent.

[0192] It is possible that the groove cover 180 is provided as a single profile part, that is, it already has Fig. 20 89 and has a length corresponding to the length of the slot 89.

[0193] However, an advantageous embodiment provides that the groove cover 180 is obtained from a coil 190. The coil 190 is prepared, for example, as a reel 191. The reel 191 is rotatably received, for example, on a reel carrier 273, in particular on a corresponding holding frame. The unwinding mechanism 274 unwinds the coil 190 from the reel 191.

[0194] The section 192 of the coil 190 that is unwound from the reel 191 passes through a roller arrangement 275 , for example, which has one or more rollers, in particular deflecting rotors or guide rollers.

[0195] Downstream of the roller assembly 275, a flattening device 276 is provided in which the section 192 is flattened so that its initial shape wound around the reel 191 is converted into a longitudinally extending shape. The flattening device 276 comprises, for example, at least one pressing unit 277, in particular mutually opposite pressing units 277, and / or a heating device 278 with a heating body 279, in order to bring the coil 190 of the section 192 into a longitudinally extending shape, such as it is in Fig. 20Thus, that is to say, the coil 190 is brought into a straight longitudinally extending shape by the flattening device 276.

[0196] A cutting device 280 is connected to the flattening device 276, by means of which the section 192 is correspondingly lengthened to a length corresponding to the desired groove cover 180, that is to say, corresponding to the length of the laminated core 81 or the carrier 90, for example. The cutting device 280 has, for example, a cutting unit 281, in particular a knife, a blade, a sawing unit or the like.

[0197] At this point, it should be mentioned that, instead of the laminated core 181 or the stator 80, other, i.e. shorter or longer stators can be provided with slot covers by means of the mounting device 270. As required, i.e., a suitable slot cover 180 is produced accordingly, the length of which is matched to the length of the stator to be equipped. That is, the cutting unit 280, for example a cutting knife, cuts the slot cover 180 accordingly from the section 192, which is then grasped by the holding unit 271 and inserted into the stator 80.

[0198] The holding unit 271 (e.g. a gripper) comprises a holding arm 272 which grips the profile body 181 or the slot cover 180 at its longitudinal end region 183 and can be inserted into the slot 89 by means of a plug-in movement SB. It is readily possible for the holding unit 271 to have a suction mechanism or a similar holding element which sucks the slot cover 180 in the region of the bottom 187 and inserts it into the slot 89 by means of a force component which generates the plug-in movement SB.

[0199] In other words, it is known that important components of the motor 20 , 120 , namely, for example, the coupling means 100 , the covering of the groove 89 by means of the groove cover 180 , can be produced by plugging, joining, pressing and the like.

[0200] The magnetization of the magnet 51 , which is also described later, follows the assembly concept.

[0201] That is, the magnet 51 is not yet magnetized when it is mounted on the rotor 40, 140 or the laminated core 41, 141. That is, when the magnetic body 52, which is still non-magnetic per se, is inserted or pressed into one of the holding receptacles 45 within the scope of a plug-in process or a pressing process, the magnetizable material 51A of the corresponding magnetic body 56 is initially non-magnetic. The magnetizable material 51A is, for example, neodymium iron boron (NdFeB), advantageously neodymium iron boron with dysprosium as an additive, or samarium cobalt (SmCo).

[0202] For example, support projections 48 are provided on the holding receptacle 45, which support the narrow side 54 of the corresponding magnetic body 52. ​​The narrow side 54 runs parallel to the rotation axis D when the magnet 50 is mounted on the rotor 40, 140. Preferably, the magnetic body 52 or the magnet 51 is clamped between the support projections 48.

[0203] Between the narrow sides 54, planar sides 53 extend which have a larger area than the narrow sides 54. The normal direction of the planar sides 53 is preferably radial to the axis of rotation D.

[0204] The laminated core 41, 141 has a retaining projection 49 for retaining the magnetic body 52. ​​The retaining projection 49 projects, for example, to the flat side 53 and rests with its free end region on the flat side 53. Preferably, the retaining projection 49 and the magnetic body 52 grip and / or form a bearing projection.

[0205] The laminations 43 of the lamination stack 41, 141 include laminations 43 having recesses 59A at a predetermined angular position with respect to the rotation axis D. The recesses 59A preferably extend radially away from one of the planar sides of the corresponding retaining receptacle 45 with respect to the rotation axis D, for example radially inwardly toward the rotation axis D. Preferably, the recesses 59A are arranged one after the other along the axis parallel to the rotation axis D, that is, flush with each other. Some of the laminations 43 have retaining projections 59 that protrude into the recesses. The retaining projections 59 also protrude into the plug-in cross section of the corresponding retaining receptacle 45, so that when the magnetic body 52 is inserted into the retaining receptacle 45, it reaches engagement with the magnetic body 52 and is inserted into the retaining receptacle 45 along the plug-in direction SR by bending the magnetic body 52. ​​Here, the retaining projections 59 can be pressed into the recesses 59A of one or more adjacent laminations 43. The end side of the respective retaining projection 59 , which has the width of the narrow side of the core plate 43 , is then supported obliquely on the flat side 53 of the magnetic body 52 and prevents the magnetic body 52 from being pulled out of the retaining receptacle 45 counter to the plug-in direction SR.

[0206] Preferably, the magnetic body 52 or the magnet 51 is accommodated in a clamping seat in the holding accommodating portion 45. Obviously, bonding, welding or other similar assembly is completely feasible. That is, the magnetizable material 51A is inserted into the corresponding lamination stack 41, 141 in a state that has not yet been magnetized.

[0207] The rotor 40, 140 is then balanced by means of a balancing device 285. The motor shaft 30, 130 and, if applicable, the insulating sleeve 60 are already mounted. This means that the rotor 40, 140 can then be rotated by means of the motor shaft 30, 130 about its axis of rotation D by means of the motor 286. The measuring device 287 determines, for example, the imbalance of the rotor 40, 140.

[0208] Then, the unbalance that still exists is eliminated, for example, by manufacturing at least one balancing part 55 with the aid of a material-reducing mechanism 288 (e.g., a grinding mechanism, a milling mechanism, or the like). Here, for example, the material of the lamination stack 41, 141 is etched at the position where balancing is necessary, wherein shavings, metal powder, or the like are generated. However, this is not a problem, because when the material of the lamination stack 41, 141 is processed, the magnetic body 52 is not yet magnetized. The shavings, powder, or the like generated by the etching of the laminations 43 do not adhere magnetically to the lamination stack 41, 141, so that they can be easily removed. That is, when the drive motor 20, 120 is operated later, there are no metal shavings or powder that can damage, for example, the bearing 24 or 25.

[0209] The compensating part 55 is advantageously arranged at a region of the lamination stack 41, 141 where the lamination stack 41, 141 has the greatest possible material strength or thickness in the radial direction with respect to the rotation axis D (that is, in particular radially on the outside with respect to the magnet 51). That is, if, for example, an imbalance U occurs at a region that is unfavorable for the production of the compensating part, a vectorial compensation is preferred, in which the imbalance U is decomposed into force vectors Ux and Uy and these are correspondingly established radially on the outside of the lamination stack 41, 141 by means of material reduction means 288 (for example, compensating parts 55x and 55y). The compensating parts 55x and 55y are, for example, radially on the outside of the lamination stack 41, 141 of the retaining receptacle 55, which is arranged directly next to it at an angular spacing relative to the imbalance U.

[0210] In the case of the rotor 40, 140, no balancing bodies or balancing weights are required at the end side 44. Thus, for example, the inlet and outlet openings of the air channel 46 are not covered by balancing weights or balancing bodies. In addition, air can also flow laterally past the magnet 51, namely through the air channel 46A, which is arranged at the holding receptacle 45 or provided by the holding receptacle 45. The inlet and outlet openings of the air channel 46A are also not covered by balancing bodies or balancing weights.

[0211] The cleaning device 289, such as a blower, a brush and / or a vacuum cleaner or the like, can easily remove metal particles generated during material etching by the material-reducing device 288 from the rotor 40, 140 (in particular the corresponding lamination stack 41, 141), as long as the magnetic body 52 is non-magnetic. For example, the cleaning device 289 generates an air flow LU, which removes chips and the like from the area of ​​the balancing part 55.

[0212] When the rotor 40, 140 is balanced, it is magnetized by means of the magnetizing device 290, that is to say, in particular the magnetic body 52 is magnetically activated. The magnetizing device 290 has, for example, magnetizing heads 291A, 291B, 291C, 291D.

[0213] For example, the magnetizing device 290 comprises a positioning device 292 which positions, in particular twists, the motor shaft 30 , 130 in such a way that the magnet 51 is situated exactly opposite the magnetizing head 291 with the correct angle.

[0214] Advantageously, the rotor 40 , 140 is positioned with respect to the magnetized heads 291A, 291B, 291C, 291D by means of a mechanical encoding 57 in such a way that a respective magnetized head 291A, 291B, 291C, 291D is arranged between adjacent magnets 51 .

[0215] For example, the anti-twist contour 74 is used as a coding portion 57, which, for example, stops at a stop 293 of the magnetizing device 290, in particular a rotation stop, so that the rotor 40, 140 is arranged with respect to the magnetizing head 291 with the correct rotation angle. The stop 293 is shown in conjunction with the balancing mechanism 285. Without any problem, other components of the rotor 40, such as the air channel 46, can also be used as the coding portion 57, and the corresponding stop of the magnetizing device 290 can be engaged in the air channel and / or the air channel can be detected optically. Advantageously, the optical detection of the rotation angle position of the rotor 40, 140 is also feasible, for example, by a camera or other similar optical sensors of the magnetizing device 290.

[0216] The magnetizing heads 291A, 291B, 291C, 291D generate magnetic fields MFA, MFB, MFC, MFD, which pass through the magnetic bodies 52 or magnets 51 arranged next to each other at an angular spacing relative to the rotation axis D, so that the magnetic bodies 52 or magnets 51 are permanently magnetized and form magnetic poles, which are indicated as north pole N and south pole S. The magnetic fields MFA, MFB, MFC, MFD are illustrated in the figures as dashed field lines with arrows corresponding to their magnetic flux directions.

[0217] When the magnets 51 of the rotor 40 , 140 are magnetized, the rotor 40 , 140 is assembled at the stator 80 .

[0218] It is understood that a plurality of magnetic bodies 52 or magnets 51 can also be arranged in the holding receptacle 45 for the magnet 51 , for example two or more magnetic bodies 52 or magnets 51 arranged in a row parallel to the axis of rotation D. In this case, magnetization of the corresponding magnetic body 52 is also possible without any problems when it is already accommodated in the holding receptacle 45 .

[0219] When magnetizing by means of the magnetizing device 290 , it is also advantageous if the laminations 43 of the lamination package 41 , 141 are magnetically conductive so that they can optimally guide the magnetic field 292 of the magnetizing device 290 through the magnetic body 52 .

Claims

1. A drive motor for a suction device (400) or a machine tool in the form of a handheld machine tool (200, 300) or a semi-stationary machine tool, wherein: The drive motor (20, 120) comprises a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130), the motor shaft being rotatably supported on or with respect to the stator (80) by means of a bearing assembly (24A) about a rotation axis (D) and extending through an axial through-opening (42, 142) of a laminated core (41, 141), the laminated core being held on the motor shaft (30, 130). The motor shaft (30, 130) is electrically insulated from the motor shaft (30, 130), characterized in that an insulating sleeve (60) is arranged between the motor shaft (30, 130) and the lamination stack (41, 141), the insulating sleeve being inserted into the shaft through-opening (42, 142) and having a plug-in receptacle (64) with an insertion opening (64A), through which the motor shaft (30, 130) is inserted along a plug-in axis (S); In which at least one form-fitting portion (75) is constructed on the insulating sleeve (60), at which the insulating sleeve (60) is pressed radially outwardly about the rotation axis (D) by a motor shaft (30, 130) into a form-fitting engagement with the laminated core (41, 141), and the motor shaft is inserted into the plug-in receptacle (64).

2. The drive motor according to claim 1, characterized in that: The insulating sleeve (60) extends over the entire length of the laminated core (41, 141) relative to the plug-in axis (S) and / or the laminated core (41, 141) is electrically insulated from the motor shaft (30, 130) only by means of the insulating sleeve (60).

3. The drive motor according to claim 1 or 2, characterized in that: The motor shaft (30, 130) protrudes in front of an insertion opening (64A) of the insulating sleeve (60) and / or in front of an exit opening (64B) of the plug-in receptacle (64), the exit opening being arranged at a longitudinal end region of the insulating sleeve (60) opposite to the insertion opening (64A).

4. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) has at least a longitudinal stop for stopping at the laminated core (41, 141) with respect to the plug-in axis (S).

5. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) has a flange body (68) protruding in front of a tube section (63) of the insulating sleeve (60) for supporting the laminated core (41, 141) with respect to the plug-in axis (S).

6. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) is clamped between the laminated core (41, 141) and the motor shaft (30, 130) in a force direction radial to the rotation axis (D) and / or in a force direction parallel to the rotation axis (D) and / or the insulating sleeve (60) is clamped radially outwardly to the laminated core (41, 141) with respect to the rotation axis (D) via the motor shaft (30, 130).

7. The drive motor according to claim 1 or 2, characterized in that: At least one support projection (43A) protrudes from the laminated core (41, 141) into the shaft through-opening (42, 142), the support projection penetrating into and / or engaging with the insulating sleeve (60).

8. The drive motor according to claim 1, characterized in that: The at least one form-fitting portion (75) comprises a stepped portion (67) at which the end side (44) of the laminated core (41, 141) is supported, and / or comprises a form-fitting receiving portion (75B) in which a support protrusion (43A) extending into the shaft through-opening (42, 142) engages.

9. The drive motor according to claim 1 or 2, characterized in that: The plug-in receptacle (64) has a first internal cross-section (W1) and a second internal cross-section (W2), the first internal cross-section being assigned to a longitudinal end region (61) of the laminated core (41, 141) facing the insertion opening (64A), the second internal cross-section being assigned to a longitudinal end region (62) of the laminated core (41, 141) facing away from the insertion opening (64A), and when the motor shaft (30, 130) is completely inserted into the plug-in receptacle (64), a section of the motor shaft (30, 130) A plug-in receptacle (64) with a first external cross-section (AQ1) abuts against the first internal cross-section (W1) in the region of the first internal cross-section (W1) and a section of the motor shaft (30, 130) with a second external cross-section (AQ2) abuts against the plug-in receptacle (64) in the region of the second internal cross-section (W2), wherein the first internal cross-section (W1) of the plug-in receptacle (64) is larger than the second internal cross-section (W1) and / or the first external cross-section (AQ1) of the motor shaft (30, 130) is smaller than the second external cross-section (AQ2).

10. The drive motor according to claim 9, characterized in that: A second inner cross section (WQ2) of the plug receptacle (64) is enlarged or widened due to the second outer cross section (AQ2) of the motor shaft (30, 130) inserted into the second inner cross section.

11. The drive motor according to claim 9, characterized in that: The inner cross section of the plug-in receptacle (64) decreases continuously from the first inner cross section (WQ1) to the second inner cross section (WQ2) and / or the outer cross section of the motor shaft (30, 130) increases continuously from the first outer cross section (AQ1) to the second outer cross section (AQ2).

12. The drive motor according to claim 1 or 2, characterized in that: The axial through-opening (42, 142) of the lamination stack (41, 141) has a larger inner cross section at a longitudinal end region (41A) provided for inserting the insulating sleeve (60) than at a longitudinal end region (41B) opposite to the longitudinal end region.

13. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) and the laminated core (41, 141) are connected to one another in a form-fitting manner in a rotationally fixed manner with respect to the rotation axis (D) and / or the plug-in axis (S) by means of a rotation-proof contour (47, 74).

14. The drive motor according to claim 13, characterized in that: The anti-twist contour (47, 74) comprises at least one anti-twist protrusion (74A) for engaging in at least one anti-twist receptacle (47A), and / or comprises at least one longitudinal rib (74B) and at least one longitudinal groove (47B), extending parallel to the plug-in axis (S) and / or the rotation axis (D).

15. The drive motor according to claim 1 or 2, characterized in that: The tube section (63) of the insulating sleeve (60) which is received in the shaft through-opening (42, 142) has a wall thickness of at least 2 mm.

16. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) has at least one insulating section (76) which projects in front of an end face of the laminated core (41, 141).

17. The drive motor according to claim 16, characterized in that: An insulation distance of at least 5 mm is formed between the laminated core (41, 141) and the motor shaft (30, 130) by the insulating section (76).

18. The drive motor according to claim 16, characterized in that: The insulating section (76) comprises a tube section (63) or is configured as a tube section (63), which does not protrude radially outwardly with respect to the rotation axis (D) before a section of the insulating sleeve (60) which is accommodated in an axial through-opening (42, 142) of the laminated core (41, 141) and which is arranged next to the insulating section (76) with respect to the plug-in axis (S).

19. The drive motor according to claim 16, characterized in that: The insulating section (76) comprises a flange body (68) which projects radially outwardly with respect to the rotation axis (D) in front of a tube section (63) of the insulating sleeve (60) which is accommodated in the laminated core (41, 141).

20. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) is inserted into the shaft through-opening (42, 142) in a state below the operating temperature of the drive motor and / or at a temperature below 40°C.

21. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) is made of plastic and / or the insulating sleeve (60) maintains a solid structure up to a temperature of at least 120°.

22. The drive motor according to claim 1 or 2, characterized in that: The insulating sleeve (60) and the motor shaft (30, 130) are in engagement with one another by means of a positive-fitting contour (36B, 136B).

23. The drive motor according to claim 22, characterized in that: The form-fitting contour (36B, 136B) comprises or is formed by a form-fitting contour portion (36, 136) at the outer periphery of the motor shaft (30, 130).

24. The drive motor according to claim 11, characterized in that: The inner cross section of the plug receptacle (64) decreases continuously from the first inner cross section (WQ1) to the second inner cross section (WQ2) in a conical manner or in the manner of a plug cone.

25. The drive motor according to claim 14, characterized in that: The rotationally fixed receptacle extends radially relative to the plug-in axis (S) and / or the axis of rotation (D).

26. The drive motor according to claim 17, characterized in that: The insulation distance is at least 7 mm.

27. The drive motor according to claim 26, characterized in that: The insulation distance is at least 8 mm.

28. The drive motor according to claim 19, characterized in that The flange body is annular.

29. The drive motor according to claim 21, characterized in that The insulating sleeve (60) is made of glass fiber reinforced plastic.

30. The drive motor according to claim 29, characterized in that The insulating sleeve (60) is made of polyamide.

31. The drive motor according to claim 30, characterized in that The insulating sleeve (60) is made of Pa6 / 66Gf30.

32. The drive motor according to claim 22, characterized in that: The insulating sleeve (60) and the motor shaft (30, 130) are in engagement with one another by means of a positive-fit contour (36B, 136B) parallel to and / or rotationally fixed with respect to a longitudinal axis (L) and / or the plug-in axis (S).

33. System, comprising a first drive motor (120) and a drive motor according to any one of claims 1 to 32 as a second drive motor (20), wherein: The first drive motor and the second drive motor are configured to be used for a suction instrument (400) or a machine tool in the form of a handheld machine tool (200, 300) or a semi-stationary machine tool, or to form a component of the suction instrument (400) or the machine tool, wherein the first drive motor and the second drive motor each have a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130), the motor shaft being rotatably supported at or with respect to the stator (80) around a rotation axis (D) by means of a support assembly (24A) and passing through an axial through-opening (42, 142) of a lamination stack (41, 141), the lamination stack being held in a relative position. The invention relates to a motor shaft (30, 130) of the first drive motor and the second drive motor, wherein the retaining sections (33) of the motor shafts (30, 130) of the first drive motor and the second drive motor have an identical outer peripheral geometry in the region of the lamination stack (41, 141), wherein the lamination stack (141) of the first drive motor (120) is directly supported on the outer periphery of the retaining section (33) of the motor shaft (30, 130) carrying the lamination stack (141) and the lamination stack (41) of the second drive motor (20) is supported on the retaining section (33) of the motor shaft (30, 130) carrying the lamination stack (41) via the insulating sleeve (60) as an electrically insulating insulator (60A).

34. Method for producing a drive motor for a suction device (400) or a machine tool in the form of a handheld machine tool (200, 300) or a semi-stationary machine tool, wherein: The drive motor (20, 120) comprises a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130), wherein the motor shaft is rotatably supported on or with respect to the stator (80) about a rotation axis (D) by means of a bearing assembly (24A) and passes through an axial through-opening (42, 142) of a laminated core (41, 141), wherein the laminated core is held on the motor shaft (30, 130) and is electrically insulated from the motor shaft (30, 130), characterized in that - inserting an insulating sleeve (60) into the shaft through-opening (42, 142), and - inserting the motor shaft (30, 130) into the plug-in receiving portion (64) of the insulating sleeve (60) through the insertion opening (64A) of the plug-in receiving portion (64), so that the insulating sleeve (60) is arranged between the motor shaft (30, 130) and the lamination stack (41, 141); In which at least one form-fitting portion (75) is constructed on the insulating sleeve (60), at which the insulating sleeve (60) is pressed radially outwardly about the rotation axis (D) by a motor shaft (30, 130) into a form-fitting engagement with the laminated core (41, 141), and the motor shaft is inserted into the plug-in receptacle (64).

Images