阅读说明：本技术 具有在转子处的平衡部分的驱动马达 (Drive motor with balancing section at rotor ) 是由 V·巴尔特 P·舍恩 于 2020-04-30 设计创作，主要内容包括：本发明涉及一种驱动马达,用于抽吸仪器(400)或以手持式工具机器(200、300)或半固定的工具机器的外形的工具机器,其中,所述驱动马达(20、120)具有带有励磁线圈组件(86)的定子(80)和带有马达轴(30、130)的转子(40、140),所述马达轴在所述定子处或关于所述定子(80)借助支承组件(24A)绕转动轴线(D)能够转动地进行支承并且穿过叠片组(41、141)的轴贯通开口(42、142),所述叠片组保持在所述马达轴(30、130)处,其中,所述转子(40、140)具有带有至少一个永磁体的磁体组件(50),从而通过给所述励磁线圈组件(86)通电流,所述转子(40、140)能够绕所述转动轴线(D)被转动驱动。设置成,所述叠片组(41、141)具有至少一个通过所述叠片组(41、141)的蚀刻材料的加工或开槽来制造的平衡部分(55)和/或所述至少一个永磁体通过磁性体(52)形成,所述磁性体在布置在所述叠片组(41、141)处的状态中已经被磁化。本发明此外涉及一种用于制造这样的驱动马达的方法。(The invention relates to a drive motor for a suction device (400) or a tool machine in the form of a hand-held tool machine (200, 300) or a semi-stationary tool machine, wherein the drive motor (20, 120) has a stator (80) with a field coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably mounted on or about the stator (80) by means of a bearing assembly (24A) about a rotational axis (D) and passes through a shaft passage opening (42, 142) of a lamination stack (41, 141) which is held on the motor shaft (30, 130), wherein the rotor (40, 140) has a magnet assembly (50) with at least one permanent magnet, such that by applying a current to the field coil assembly (86), the rotor (40) is provided with a magnet assembly (50) having at least one permanent magnet, such that by applying a current to the field coil assembly (86), 140) Can be driven in rotation about the axis of rotation (D). Provision is made for the lamination stack (41, 141) to have at least one equalization section (55) produced by machining or grooving of the etched material of the lamination stack (41, 141) and/or for the at least one permanent magnet to be formed by a magnetic body (52) which has been magnetized in a state arranged at the lamination stack (41, 141). The invention further relates to a method for producing such a drive motor.)

1. Drive motor for a suction apparatus (400) or a tool machine in the form of a hand-held tool machine (200, 300) or a semi-stationary tool machine, wherein the drive motor (20, 120) has a stator (80) with a field coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably supported at the stator or with respect to the stator (80) by means of a bearing assembly (24A) about a rotational axis (D) and passes through a shaft through opening (42, 142) of a lamination stack (41, 141) which is held at the motor shaft (30, 130), wherein the rotor (40, 140) has a magnet assembly (50) with at least one permanent magnet such that the rotor (40, 140) can be driven in rotation about the rotational axis (D) by supplying current to the field coil assembly (86), characterized in that the lamination stack (41, 141) has at least one balancing portion (55) produced by machining or grooving of the etched material of the lamination stack (41, 141) and/or the at least one permanent magnet is formed by a magnetic body (52) which has been magnetized in a state arranged at the lamination stack (41, 141).

2. A drive motor according to claim 1, characterized in that the balancing portion (55) is a tangential recess at the outer periphery of the lamination stack (41, 141) radially with respect to the axis of rotation (D).

3. The drive motor according to claim 1 or 2, characterized in that the rotor (40, 140) is balanced in a vectorial manner and/or at the lamination stack (41, 141) at least two balancing portions (55) are arranged at an angular spacing with respect to the axis of rotation (D) of the rotor (40, 140) for compensating an unbalance of the rotor (40, 140) between the balancing portions (55).

4. The drive motor according to any one of the preceding claims, characterized in that at least two or all balancing portions (55) are arranged in the same longitudinal position or approximately in the same longitudinal position with respect to the axis of rotation (D) at the lamination stack (41, 141).

5. The drive motor according to any one of the preceding claims, characterized in that the at least one balancing portion (55) or all balancing portions (55) are arranged at a radial outer circumferential region of the lamination stack (41, 141) where the lamination stack (41, 141) has a maximum radial material strength with respect to the axis of rotation (D).

6. The drive motor according to any one of the preceding claims, characterized in that the at least one balancing portion (55) or all balancing portions (55) are arranged radially outside in the same angular position with respect to the axis of rotation (D) as the at least one magnetic body (52) or permanent magnet.

7. The drive motor according to one of the preceding claims, characterized in that no additional balancing weights, in particular no additional brass balancing weights, are arranged at the rotor (40, 140) and/or no balancing bodies are arranged at the end sides of the rotor (40, 140).

8. The drive motor according to one of the preceding claims, characterized in that the rotor (40, 140) has at least one air channel extending parallel to the axis of rotation (D) with a flow cross section which is completely open at one or both end sides of the rotor (40, 140) and/or is not covered by a balancing body.

9. The drive motor according to one of the preceding claims, characterized in that the at least one magnetic body (52) or permanent magnet has a plate-like shape and/or a flat shape or is designed as a magnet plate.

10. The drive motor according to one of the preceding claims, characterized in that a plurality of magnetic bodies (52) or permanent magnets are arranged at the lamination stack (41, 141), which have an angular spacing relative to one another with respect to the axis of rotation (D) of the rotor (40, 140) and/or annularly enclose the axis of rotation (D).

11. The drive motor according to one of the preceding claims, characterized in that the at least one magnetic body (52) or permanent magnet is accommodated in a retaining accommodation, in particular a plug accommodation, of the lamination stack (41, 141).

12. The drive motor as claimed in claim 11, characterized in that a retaining projection projects into the plug-in cross section of the retaining receptacle, at which retaining projection, in particular at its end face, the at least one magnetic body (52) or permanent magnet is supported opposite the plug-in direction, in which plug-in direction the magnetic body (52) or permanent magnet can be inserted into the retaining receptacle.

13. Drive motor according to one of the preceding claims, characterized in that the magnetic body (52) is made of a permanently magnetized or magnetizable material or has such a material, in particular made of alnico or samarium cobalt or neodymium iron boron.

14. Method for producing a drive motor (20, 120) for a suction apparatus (400) or a tool machine in the form of a hand-held tool machine (200, 300) or a semi-stationary tool machine, wherein the drive motor (20, 120) has a stator (80) with a field coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably supported at or about the stator (80) about a rotational axis (D) by means of a support assembly (24A) and passes through a shaft through opening (42, 142) of a lamination stack (41, 141) which is held at the motor shaft (30, 130), wherein the rotor (40, 140) has a magnet assembly (50) with at least one permanent magnet in order to apply a current to the field coil assembly (86), -said rotor (40, 140) being rotatably drivable about said axis of rotation (D), characterized in that:

-subjecting the lamination stack (41, 141) to machining or slotting of an etching material to produce balancing portions (55) and/or to magnetize a magnetic body (52) arranged at the lamination stack (41, 141) to produce the at least one permanent magnet.

15. Method according to claim 14, characterized in that the magnetic body (52) is magnetized after the manufacture of the at least one balancing portion (55) or all balancing portions (55).

16. Method according to claim 14 or 15, characterized in that a magnetization mechanism (290) is used for magnetizing the magnetic bodies (52), which magnetization mechanism has a plurality of magnetization heads (291) with an angular spacing corresponding to the angular spacing of the magnetic bodies (52) with respect to the axis of rotation (D) of the rotor (40, 140), so that a plurality or all of the magnetic bodies (52) can be magnetized simultaneously by means of the magnetization mechanism (290) corresponding to the desired magnetic polarization of the magnet assembly (50).

17. The method of claim 16, wherein a positioning mechanism is used to correctly position the rotor (40, 140) with respect to the magnet head angle.

Technical Field

The invention relates to a drive motor for a suction device or a machine tool in the form of a hand-held machine tool or a semi-stationary machine tool, wherein the drive motor has a stator with a field coil assembly and a rotor with a motor shaft which is rotatably mounted on or in relation to the stator by means of a bearing assembly about a rotational axis and passes through a shaft passage opening of a lamination stack which is held on the motor shaft, wherein the rotor has a magnet assembly with at least one permanent magnet such that the rotor can be driven in rotation about the rotational axis by supplying current to the field coil assembly. The invention further relates to a method for producing such a drive motor.

Background

Typically, in a drive motor having a rotor excited by permanent magnets, a balancing disk made of brass or similar other non-magnetic material is arranged, so that the rotor can be balanced by machining of the etched material of such a balancing disk. Due to the nonmagnetic properties of the brass, shavings or other particles produced there do not adhere to the lamination stack, despite the permanent magnets contained therein. However, the additional balancing disk requires space, so that the rotor and thus the drive motor are correspondingly longer.

Disclosure of Invention

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

In order to solve this problem, in a drive motor of the type mentioned at the outset, it is provided that the lamination stack has at least one equalization section produced by machining or grooving the lamination stack with an etching material and/or that the at least one permanent magnet is formed by a magnetic body which has been magnetized in a state arranged at the lamination stack.

In a method of the type mentioned at the beginning, to solve the problem, it is provided that:

machining or grooving the stack of plates with etching material to produce the balance, and/or

-magnetizing a magnetic body arranged at the lamination stack to produce at least one permanent magnet.

A plurality of magnetic bodies, which can be magnetized, are preferably arranged on the lamination stack. It is particularly advantageous if the magnet arrangement has a plurality of permanent magnets at the lamination stack, which are angularly spaced apart from one another, over a peripheral region about the axis of rotation.

In order to balance the rotor, the lamination stack is machined in an etched material manner, for example by machining, in particular by polishing, milling, drilling or the like, in order to produce one or more balancing portions and to balance the rotor. One or more grooves can also be provided as balancing portions. No additional counter-body, such as a brass disc or the like, is required. However, it is basically possible for the rotor to have, on the one hand, at its lamination stack, one or more balancing portions which are produced by material etching or grooving and, in addition, but in a manner of speaking, additionally or additionally also to be provided with one or more balancing weights at the rotor, in particular at the lamination stack or at the end faces of the rotor.

That is, at least one balance portion is made by reducing material, grooving or the like (that is, by reducing the material strength of the lamination stack) according to the present invention.

When no balancing body is required, this results in a more favorable weight of the drive motor, since no additional balancing weight is required, but the lamination stack can be said to be even lighter. When the balancing disk is omitted, the rotor and thus the drive motor can be shorter overall.

When no balancing disk is arranged on the end face of the stator lamination, the magnetic field of the magnet assembly can be detected unhindered by a sensor arranged on the end face of the stator lamination.

In the method, it is advantageously provided that the magnetic body is magnetized after the production of at least one balancing portion or all balancing portions. The advantageous idea is that a non-magnetic or non-magnetized magnetic body is arranged at the lamination stack before the at least one balancing portion is manufactured. The shavings, particles or the like which accumulate here do not adhere to the rotor or can be removed easily anyway on account of the rotor's or non-magnetic properties. As a result, particles, shavings or the like which are produced during the processing of the etched material of the lamination stack cannot reach the supports of the bearing arrangement or other similar mechanical components. The air gap between the rotor and the shaft through-opening of the stator is also not contaminated by such particles.

It is basically possible for the rotor to be balanced with its lamination stack first by producing one or more balancing portions by machining or grooving of the etched material and then arranging the already magnetized or magnetic permanent magnets at the rotor or lamination stack. In this case, it can however be necessary to carry out a further balancing after the permanent magnets have been placed at the lamination stack, wherein preferably in this case additional weights are applied, such as balancing weights, balancing disks or the like. The additional weight can be made of a material that can be magnetized, but is preferably made of brass or similar other non-magnetizable or non-magnetic material.

In principle, it is possible for at least one balancing section to be arranged, for example, on the end face of the lamination stack. It is advantageously provided, however, that the balancing portion is a tangential recess at the outer periphery of the lamination stack in the radial direction with respect to the axis of rotation. A combination of end-side and radially outer balancing portions is possible, i.e. one or more balancing portions are provided both at the end side of the lamination stack and at its radially outer periphery.

Advantageously, the rotor is balanced in a vectorial manner. The balancing of the vectors is arranged such that the balancing portion is not manufactured at the location of the unbalance, but shortly therefrom. At the location of the imbalance, the unbalanced forces are vectorially determined, that is to say at least two different force vectors of the imbalance are determined. In order to compensate for the two different force vectors, balancing portions are provided at the lamination stack, which balancing portions have a spacing with respect to one another.

An advantageous concept provides that at least two balancing portions arranged at an angular distance from one another with respect to the axis of rotation of the rotor are arranged on the lamination stack in order to compensate for an imbalance of the rotor between the balancing portions. The compensation is for example a vector compensation.

When a plurality of balancing portions is provided, they are preferably arranged at the lamination stack in the same longitudinal position or approximately in the same longitudinal position with respect to the axis of rotation. For example, the two aforementioned balancing portions (between which there is a true unbalance of the rotor) are arranged in the same longitudinal position with respect to the axis of rotation.

The lamination stack can be locally weakened or reduced in its volume, as it were, by material etching, grooving or the like. An advantageous embodiment provides that at least one balancing portion or all balancing portions are arranged at a radial outer circumferential region of the lamination stack, at which the lamination stack has a maximum radial material strength with respect to the axis of rotation. For example, no air channels or the like are present in the region of the balancing portion.

Advantageously, at least one balancing part or all balancing parts are arranged radially on the outside with respect to the axis of rotation in the same angular position as the at least one magnetic body or the permanent magnet. In particular when the magnetic body is plate-shaped or has a flat profile, a greater material strength of the lamination stack results radially on the outside, which is optimally suitable for reducing machining or mapping (kartiering) of the material in order to produce the balancing portion or portions.

As already mentioned, it is advantageous if no additional balancing weights, in particular no additional brass balancing weights, are arranged at the rotor and/or no balancing bodies are arranged at the end faces of the rotor.

It is advantageous, for example, if the rotor has at least one air channel running parallel to the axis of rotation with a flow cross section which is completely open at one or both end sides of the rotor and/or is not covered by a balancing body.

Basically, the magnetic body or the permanent magnet of the rotor can be designed with a contour of different geometric shapes, for example with a cylindrical shape or the like. However, it is preferably provided that the at least one magnetic body or permanent magnet has a plate-like and/or flat shape or is designed as a magnet plate.

The magnets are advantageously arranged in such a way that a plurality of magnetic or permanent magnets are arranged at the lamination stack, which are angularly spaced relative to one another about the axis of rotation of the rotor and/or annularly surround the axis of rotation. Thereby, a plurality of magnetic poles of the rotor can be provided.

In principle, it is possible to arrange the magnetic body at the end face on the lamination stack. However, in order to be arranged as optimally as possible opposite the field coil arrangement, the concept is suitable in which recesses or similar further receptacles are provided for the magnetic bodies or permanent magnets. Preferably, it is provided that at least one magnetic body or permanent magnet is accommodated in a retaining receptacle, in particular a plug receptacle, of the lamination stack. In the holding receptacle or plug receptacle, the magnetic body is preferably held in the clamping holder. However, it is also possible for the magnetic body to be held, for example, in a form-fitting manner, glued in a holding receptacle or the like.

As a mechanical fastening of the magnetic body or the permanent magnet in the retaining receptacle of the lamination stack, the following measures apply: it is preferably provided that a retaining projection projects into the plug-in cross section of the retaining receptacle, at which retaining projection, in particular at the end face thereof, at least one magnetic or permanent magnet is supported opposite the plug-in direction, which magnetic or permanent magnet can be inserted into the retaining receptacle. For example, the holding projection is formed by a tab-like projection which is moved in the plug-in direction when the magnetic body or the permanent magnet is inserted into the holding receptacle and is bent or deformed in the process, so that it then bears against the side of the magnetic body or the permanent magnet on the end side and/or at an angle and prevents or prevents the magnetic body or the permanent magnet from moving out of the holding receptacle counter to the plug-in direction.

In principle, it is possible for a plurality of magnetic bodies to be magnetized in succession. However, it is preferably provided that a magnetization device is used for magnetizing the magnetic bodies, which has a plurality of magnetization heads with an angular spacing corresponding to the angular spacing of the magnetic bodies with respect to the axis of rotation of the rotor, so that a plurality or all of the magnetic bodies can be magnetized simultaneously by means of the magnetization device corresponding to the desired magnetic polarization of the magnet assembly. In this case, it is advantageous to apply a positioning mechanism for correctly positioning the rotor with respect to the angle of the magnet head. For example, the positioning mechanism has a mechanical stop, at which a counter stop of the rotor or another coding is stopped. For positioning the rotor with respect to the magnetization, however, optical measures are also suitable, for example with the aid of image recognition, cameras or the like.

In principle, it is possible to arrange an insulator between the motor shaft and the lamination stack, which insulator electrically insulates the motor shaft from the lamination stack.

The insulator can be, for example, a cast body.

It is advantageously provided that an insulating sleeve is arranged between the motor shaft and the lamination stack, said insulating sleeve being inserted into the shaft through-opening and having a plug receptacle with an insertion opening through which the motor shaft is inserted into the plug receptacle along a plug axis.

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 passage opening of the lamination stack and which 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 receptacle of the insulating sleeve. However, it is basically also conceivable to first insert the motor shaft into the plug receptacle of the insulating sleeve and then insert the insulating sleeve arranged on the motor shaft into the shaft through-opening.

The insulating sleeve preferably extends over the entire length of the lamination stack with respect to the plug axis. In this way, the holding section of the motor shaft, at which the lamination stack is held, is electrically insulated completely from the lamination stack by means of the insulating sleeve.

It is also possible for the lamination stack to be electrically insulated from the motor shaft only by means of an insulating sleeve. Furthermore, it is possible, however, to provide additional insulation measures, i.e. for example the motor shaft itself also has an insulation layer which is arranged between the insulation sleeve and the motor shaft in the assembled state of the drive motor. Furthermore, it is conceivable that the insulating sleeve is inserted into the through-shaft opening of the lamination stack, but is additionally cast, for example, in a plastic material. Thereby providing additional insulation.

The motor shaft preferably projects before the insertion opening of the insulating sleeve and/or before an exit opening of the plug receptacle, which is provided at a longitudinal end section of the insulating sleeve opposite the insertion opening. For example, the motor shaft can project on both sides in front of the insulating sleeve, in order to be rotatably supported in relation to the stator, for example by means of a bearing arrangement, in particular by means of ball bearings, roller bearings or similar other rolling bearings. In this connection, it should be mentioned, however, that the insulating sleeve can also extend, for example, to one of the bearings, i.e. it can provide electrical insulation in a sandwich-like manner, for example, between the bearing receptacle of the bearing and the motor shaft.

The insulating sleeve expediently has at least one longitudinal stop for stopping the lamination stack with respect to the plug axis. The longitudinal stop can, for example, comprise a radial projection which projects radially with respect to the rotational axis or the plug axis in front of the pipe section of the insulating sleeve.

The insulating sleeve expediently has a flange body projecting ahead of the tube section of the insulating sleeve for supporting the lamination stack about the plug 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, i.e. it extends annularly about the axis of rotation or the plug axis. It is also possible, however, for the flange body to be a partial ring body, that is to say not completely ring-shaped.

The magnet assembly arranged at the rotor comprises magnets, in particular permanent magnets.

For example, the magnetic body of the magnet which is magnetized or is suitable for being magnetized at the lamination stack of the rotor consists of alnico, a bismuth-manganese magnetic alloy (that is to say an alloy consisting of bismuth, manganese and iron), of a ferrite (for example a hard-magnetic ferrite, for example based on barium, strontium), of neodymium-iron-boron (NdFeB) (neodymium-iron-boron advantageously with an addition of dysprosium), of samarium-cobalt (SmCo) (samarium-cobalt advantageously with an iron content of 20 to 25%, for example SmCo₅、Sm₂Co₁₇、Sm(Co,Cu,Fe,Zr)_zOr the like. Rare earth magnets or plastic magnets are also feasible. In addition, alnico, platnico, cupronickel, and cupnico, iron-cobalt-chromium, martensitic steel, or manganese-aluminum-carbon is suitable for the magnetic body.

The drive motor preferably relates to a brushless motor or an electronically commutated motor. It is particularly advantageous if the respective stator of the drive motor has or is excited by permanent magnets.

The stack of laminations of the rotor and/or stator is preferably manufactured from layered electronic laminations or transformer laminations.

The stator of the drive motor expediently comprises a carrier body made of plastic, in particular of polyamide. The support body is produced, for example, by injection molding and/or overmolding of the stator lamination stack. It is also possible for the carrier to comprise one or more plug-in bodies or plug-in carriers, which are plugged to the lamination stack. Such a plug-in carrier can be plugged, for example, onto one or both end sides of the stator lamination. The support body covers the stator lamination preferably in the region of the rotor receptacle and/or in the region of one or both end sides of the stator lamination. At the carrier, supports, support projections, winding heads and the like are preferably provided for receiving the coil conductors of the excitation coil assembly. The carrier body preferably also has electrical connection contacts or a connection means for connecting a connection line, by means of which the drive motor is connected or can be connected to the current supply means.

Drawings

Subsequently, embodiments of the present invention are explained with reference to the drawings. Wherein:

fig. 1 shows a perspective oblique representation of a system of two electric drive motors and a hand-held power tool machine, which has the drive motors,

FIG. 2 shows a side view of one drive motor of the system according to FIG. 1, wherein

A cross-sectional view along section line a-a in figure 2 is shown in figure 3,

figure 4 shows a cross-section through another drive motor of the system according to figure 1 approximately along the same section line a-a corresponding to figure 2,

figure 5 shows in a perspective illustration an insulating sleeve of the drive motor according to figure 4,

figure 6 shows a perspective illustration of the rotor of the drive motor according to figure 4,

figure 7 shows a sectional illustration through the rotor according to figure 6 at the time of its manufacture approximately along the sectional line B-B in figure 6,

fig. 8 shows a view approximately corresponding to fig. 7, in which, however, the motor shaft is completely inserted into the rotor lamination stack,

figure 9 shows detail D1 from figure 8,

fig. 10 shows an oblique view in perspective towards the stator according to fig. 1, approximately corresponding to the detail D2 in fig. 1,

fig. 11 shows a sectional view through the stator according to fig. 10 along sectional line C-C for illustrating the coupling mechanism at

In fig. 12, the side is in the open state and

shown in figure 13 in a laterally closed condition,

fig. 14 shows a perspective illustration of the coupling mechanism according to fig. 12, an

Figure 15 shows a perspective illustration of the coupling mechanism according to figure 13,

fig. 16 shows a perspective oblique view in perspective oblique representation for illustrating the assembly and machining of the coupling mechanism according to fig. 10 to 14, approximately corresponding to fig. 10 with welding jaws,

figure 17 shows a cross-section through the assembly according to figure 16 approximately along the section line D-D,

fig. 18 shows a picture according to fig. 17, however, with the welding tong arms moved relative to each other,

fig. 19 shows a detail D3 of the stator according to fig. 1 with a slot cover in

Shown in perspective obliquely in figure 20,

figure 21 shows a detail D4 from figure 19 during the assembly of the slot cover parts into the stator slots according to figure 17,

fig. 22 shows detail D4, however, with a slot cover adjusted further into the stator slot, an

Figure 23 shows detail D4 with the groove cover portion fully assembled,

fig. 23B shows an alternative embodiment of the trough cover and trough, approximately corresponding to the view according to fig. 23,

figure 24 shows a schematic illustration of an assembly device for producing the slot cover according to figure 19 and assembling it at the stator according to figures 21 to 23,

fig. 25 shows a perspective oblique view of a part of the rotor of the previously mentioned motor, approximately corresponding to part D5 in fig. 6, an

Fig. 26 shows a schematic representation of a balancing mechanism for balancing a rotor according to the previous figures, an

Fig. 27 shows a schematic front view of a rotor with a magnetization device according to the previous figures.

Detailed Description

Fig. 1 shows a system diagram, comprising a hand-held power tool machine 300, for example a sawing machine, in which 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 receptacle 301. The drive motor 20 is accommodated in a housing 303 of the power tool 300 and can be switched on and off by means of a switch 304. The rotational speed of the drive motor 20 is preferably also adjustable by means of the switch 304.

For the current supply of the hand-held power tool machine 300, a coupling cable 305 is used for coupling to the energy supply grid EV. The energy supply grid EV provides a supply voltage P1, for example 110 vac, 230 vac or the like. The hand-held power tool 300 can have a current-carrying mechanism 306 connected between the switch 304 and the drive motor 20.

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 a drive motor 20 and can be coupled to an energy supply grid EV, for example, by means of a coupling cable 405.

In any case, the voltage P1 is significantly greater than the voltage P2, for example at least four to five times greater, the voltage P2 being provided by the energy store 205 of the hand-held power tool machine 200. The voltage P2 is, for example, a dc voltage of 14V, 18V or the like.

The hand-held power tool machine 200 is, for example, a screwing machine, a drilling machine or the like. A drive motor 120, which is suitable for a lower voltage P2, is accommodated in the housing 203 of the hand-held power tool 200. The drive motor 120 is supplied with current by a current supply means 206, which is supplied with electrical energy via an energy store 205. The drive motor 120 drives a tool holder 201 for a working tool 202, for example a drilling or screwing tool, directly or via a transmission 208. The energization mechanism 206 can be switched on, off and/or designed for adjusting the rotational speed of the drive motor 120 by means of the switch 204.

The drive motors 20, 120 have partially identical or similar components.

For example, the motor shafts 30 and 130, which can optionally be used in the drive motors 20, 120, each have a bearing section 31, 32, between which a holding section 33 is arranged. The support section 32 is located next to the output section 34 and serves to drive the tool holder 201 or 301. A gear wheel can be arranged or can be arranged, for example, at the output section 34. Alternatively, there is a meshing 35 as illustrated in the case of the motor shaft 130. The retaining section 33 preferably has a form-fitting contour 36 which extends between sections 37 which are flat, that is to say have no form-fitting contour.

The form-fitting profile 36 comprises, for example, a groove and/or a projection 36A extending parallel to the longitudinal axis L of the motor shaft 30. However, grooves, a honeycomb-like structure or the like can also be provided as form-fitting contours 36.

The form-fitting profile 136 of the motor shaft 130 comprises, for example, a form-fitting projection 136A inclined obliquely to the longitudinal axis L. However, the form-fitting projection 136A has a slight inclination of inclination, for example between 5 and 15 degrees, so that the form-fitting projection 136A runs substantially parallel to the longitudinal axis L.

The form-fitting profile sections 36, 136 form, for example, form-fitting profiles 36B, 136B.

The driven section 34 can be provided for driving the fan wheel. For example, the fan wheel securing part 38 is provided at the motor shaft 130, which is arranged, for example, between the meshing part 35 and the bearing section 32.

The motor shaft 30 or 130 can be connected in a rotationally fixed manner to the lamination stack 41 or 141 of the rotor 40, 140. The lamination stack 41, 141 has laminations 43 arranged side by side with each other transversely to the longitudinal axis L in a row arrangement, for example electronic laminations or transformer laminations of a type known per se.

The lamination stack 41, 141 has shaft through openings 42, 142 with 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 the insulating sleeve 60, while the motor shaft 30 or 130 can be inserted directly into the shaft through-opening 142, i.e. without an insulating sleeve or similar further objects.

Insulating sleeve 60 forms an insulator 60A by means of which lamination stack 41 is electrically insulated from motor shaft 30 or 130, respectively, carrying the lamination stack.

A magnet assembly 50 is arranged at the lamination stacks 41 and 141. The lamination stack 41 or 141 has a holding receptacle 45 for the magnets 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 a total of four magnetic poles. The magnet 51 is, for example, a permanent magnet.

The magnet 51 has, for example, a plate-like shape. The magnet 51 is, for example, a magnet plate or a plate-shaped body 56. Accordingly, the holding receptacle 45 is suitable for receiving plate-shaped, that is to say flat, rectangular, cubic plate-shaped bodies or magnet plates and has a corresponding inner circumferential contour.

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 axis of rotation D of the motor 20, 120.

Furthermore, the rotor 40, in particular as a lamination stack 41, 141, is penetrated by an air channel 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 the lamination stack 41, 141 can be flowed through by air.

Although the shaft through openings 42, 142 have a substantially circular inner circumferential contour, it is advantageous additionally to have a torsion-proof contour 47, in particular a torsion-proof receptacle 47A. The anti-rotation profile 47 is, for example, a longitudinal groove 47B, which extends parallel to the axis of rotation D or the longitudinal axis L.

The two motor shafts 30, 130 can be inserted into the lamination packs 41, 141, respectively.

In the case of a lamination stack 141, whose shaft through opening 142 has a smaller diameter than the shaft through opening 42 of the other lamination stack 41, the respective motor shaft 30, 130 can be inserted directly, for example pressed, into the shaft through opening 142.

The narrow side or end side of the inner circumference of the limiting shaft through opening 42 or of the lamination 43 projecting into it is advantageously gripped with the motor shaft 30, 130 so that it is accommodated in the lamination stack 141 so as to be non-displaceably in the 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 shafts 30, 130, the electrical conductivity of the lamination stack 141 and the motor shafts 30, 130, which are preferably made of metal, is also possible, since the rotor 140 is provided for application with the drive motor 120 and thus for the lower voltage P2.

In the rotor 40, on the other hand, insulation measures are taken, so that electrical safety is given despite the electrical conductivity of the motor shaft 30, 130 and the associated stator lamination 41.

That is, the motor shaft 30, 130 is accommodated in the lamination stack 41 by means of the insulating sleeve 60. The insulating sleeve 60 can be said to form a protective covering or an outer envelope of the motor shaft 30, 130 in the section received in the shaft through opening 42.

The insulating sleeve 60 has a tube section 63 between its longitudinal ends 61, 62, which is arranged in a sandwich-like manner between the lamination stack 41 and the motor shafts 30, 130 and which is electrically insulated relative to the lamination stack 41.

The tube section 63 has a plug 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 receptacle 64 has an insertion opening 64A, through which the motor shaft 30 can be inserted into the plug receptacle 64. At the exit opening 64B, the motor shaft 30 exits from the plug receptacle 64.

In the region of the longitudinal end 61, that is to say in the longitudinal end region 61A, the plug 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 to say in the longitudinal end region 62A), in which longitudinal end region 62A smaller diameter W2 and thus a smaller internal cross section WQ2 are present. For example, the diameter of the motor shaft 30, 130 is approximately 10mm in the region of the longitudinal ends 61, 62. In contrast, the diameter W2 is approximately 0.2mm to 0.3mm smaller than the diameter W1 before the motor shafts 30, 130 are inserted into the plug receptacle 64. That is to say, when the motor shaft 30, 130 is inserted into the insulating sleeve 60 along the plug axis S from the longitudinal end 61 to the longitudinal end 62 as illustrated in fig. 7, 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 not only in the region of the diameter W1 but also in the region of the diameter W2.

Alternatively or additionally, it is possible, for example, for the motor shaft 30 to have a first and a second outer cross section AQ1, 2, which are assigned to the longitudinal ends 61, 62 of the plug receptacle 64, wherein the first outer cross section AQ1 is smaller than the second outer cross section AQ 2. In the described embodiment of the motor shaft 30, it is also possible for the diameters W1 and W2 of the plug receptacle 64 and thus the inner cross-sections to be identical or approximately equal in the region of the longitudinal ends 61 and 62.

Between the longitudinal ends 61, 62, the plug receptacle 64 preferably becomes successively narrower from the diameter W1 to the diameter W2. However, it is also possible for there to be at least one step between the diameter W1 and the diameter W2. Advantageously, the plug receptacle 64 has a plug taper which becomes narrower from the longitudinal end 61 to the longitudinal end 62.

At the longitudinal end 61, a lead-in ramp 65, for example a lead-in cone, is advantageously present in order to simplify the insertion process of the motor shaft 30, 130 into the plug receptacle 64.

When the motor shaft 30, 130 is inserted into the plug receptacle 64 along the plug axis S, it continues to be pressed forward in the direction of the longitudinal end 62, wherein the tube section 63, which becomes narrower toward the longitudinal end 62, widens as it were.

The assembly is designed as follows:

first, the insulating sleeve 60 is inserted into the shaft through opening 42 of the lamination stack 41.

It is advantageously provided that the plug-in cross section or the inner cross section of the shaft through opening 42 is equal or approximately equal over its entire length provided for insertion of the insulating sleeve 60.

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

Then, the motor shaft 30, 130 is inserted into the plug receptacle 64. As a result, the motor shaft 30, 130 presses the radially outer circumference of the tube section 64 in the direction of the radially inner circumference of the shaft through opening 42 when it is inserted into the plug receptacle 64 along the plug axis S. The lamellae 43 preferably penetrate into the circumferential wall 66 with their narrow sides facing the shaft through opening 42 in a toothed manner.

The plug receptacle 64 has a narrower diameter W2 up to the region in front of the stator lamination 41, so that when the motor shaft 30, 130 reaches the region of the plug receptacle 64, the circumferential wall 66 of the tube section 63 widens radially outwards with respect to the plug axis S and thus extends the tube or the tube section 63. A form-fitting part 75 with a step 67 is thereby formed at the outer periphery of the peripheral wall 63, which comes directly into engagement with the end side 44 of the lamination stack 41 or into the rear grip. That is to say, the step 63 holds the insulating sleeve 60 at the lamination stack 41 in 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.

At the other longitudinal end region, i.e. at the longitudinal end 61, the insulating sleeve 63 has a flange body 68 which projects radially outward with respect to the plug axis S or the longitudinal axis L in front of the tube section 63.

The flange body 68 forms a longitudinal stop 68A with respect to the plug axis S and is supported, for example, in the region of the longitudinal end 61 at the end face 44 of the lamination stack 41. The flange body 68 has, for example, reinforcing ribs 69, which extend from its radial outer circumference in the direction of the plug receptacle 64 (i.e., radially inward toward the plug axis S). The reinforcing ribs 69 are arranged, for example, on an end face 71 of the flange body 68 facing away from the lamination stack 41.

Furthermore, a support stop 70 for the motor shaft 30, 130 is provided at the insertion opening 64A, at which a support stop 39 of the motor shaft 30, 130, for example a stepped support stop 39, 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 the end 71 of the insulating sleeve 60 and the plug receptacle.

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, a lead-in ramp 72 is provided at the longitudinal end 62, which simplifies the insertion of the insulating sleeve 60 into the shaft through opening 42 of the lamination stack 41. The longitudinal end 62 is designed, for example, as a plug-in lug.

Preferably, the insulating sleeve 60 projects at the longitudinal end 62 with a tube section 73 forming an insulating section 76 ahead of the end face 44 of the lamination stack 41, so that an electrical insulation is provided there between the motor shaft 30, 130 on the one hand and the laminations 43 on the other hand.

Conversely, at the other longitudinal end 61, the flange body 68 (which can be said to project laterally or beyond the shaft through opening 42) is responsible for the electrical insulation and likewise forms an insulation section 76. In this way, an electrical insulation distance, for example, of approximately 8mm to 10mm, for example, an air and electrical gap (kriechtech), is obtained both in the region of the flange body 68 and at the tube section 73, which is suitable for electrical insulation with respect to the voltage P1.

At the radially outer periphery of the insulating sleeve 60, in particular over the entire longitudinal extension of the tube section 63, a torsion-proof contour 74 is preferably arranged for engagement in the torsion-proof contour 47 of the lamination stack 41. The anti-rotation contour 74 is designed, for example, as an anti-rotation projection 74A, in particular as a longitudinal projection or longitudinal rib 74B, which extends parallel to the plugging axis S or the rotational axis D.

The insulating sleeve 60 is accommodated in a clamping or pressing seat between the motor shaft 30, 130 and the lamination stack 41. Thereby, a force fit is achieved.

Due to the anti-rotation contours 47, 74, there is also a form fit, by means of which the insulating sleeve 60 is held in a form-fitting manner at the lamination stack 41 about and/or transversely to the axis of rotation D.

The form-fitting contour 36, 136 of the motor shaft 30, 130 engages in a toothed manner into 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 rotational axis D or longitudinal axis L and/or in a displacement-proof manner about the rotational axis D or longitudinal axis L. The form-fitting profiles 36, 136 advantageously form mating form-fitting profiles at the inner circumference of the tube section 36, that is to say, for example, the inner circumference of the tube section 63 is plastically deformed, so that the form-fitting profiles 36, 136 are in form-fitting engagement therewith. The features of the plastic deformation or the mating form-fitting contour are obtained or formed, for example, when the motor shaft 30, 130 is inserted into the insulating sleeve 60.

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

Preferably, the bearing projection 43A projecting into the shaft through opening 42 or 142 penetrates into the radial outer circumference of the tube section 63 of the insulating sleeve 60 or into the radial outer circumference of the holding section 33 of the motor shaft 30, 130. At the insulating sleeve 60, for example, a form-fitting part 75A is formed, that is to say, for example, a form-fitting receptacle 75B, into which the mounting lug 43A engages (illustrated schematically in fig. 5). The radially outer circumference of the tube section 63 is pressed radially outward, for example by the motor shaft 30, about the plug axis S or the rotational axis D, wherein the abutment projection 43A penetrates into the tube section 63 and preferably grips therein.

The abutment projection 43A is provided, for example, at the end side of the lamination 43 facing the shaft through opening 42 or 142. Between the abutment projections 43A, in particular between groups of abutment projections 43A, there is preferably a spacing, for example an angular spacing and/or a longitudinal spacing, with respect to the axis of rotation D. The abutment projection 43A holds the insulating sleeve 60 in the shaft through opening 42 or the motor shaft 30, 130 in the shaft through opening 142 in a peripheral direction parallel to and/or with respect to the rotational axis D. Preferably, a plurality of seating protrusions 43A are provided at angular intervals around the rotation axis D. The insulating sleeve 60 is pressed radially outwards by the motor shaft 30 inserted therein, so that the abutment projection 43A penetrates, in particular clip-like, into the outer circumference or cap or circumferential wall 66 of the insulating sleeve 60.

The rotor 40, 140 of the drive motor 20, 120 can be used with a stator 80 having a field coil assembly 86. The field coil assembly 86 can have differently designed field coils 87, for example field coils 87 with more or less windings, with different conductor cross sections or the like, in order to adapt to different voltages P1 and P2 and/or the current intensity of the current flowing through the field coil 87.

The stator 80 has a lamination stack 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 lamination stack 81 and the lamination stack 41, 141 is present in a manner known per se.

The lamination stack 81 has laminations 83, for example electronic laminations or transformer laminations, the plate planes of which extend transversely to the axis of rotation D of the drive motor 20, 120. The respective motor shaft 30, 130 projects before the end sides 84, 85 of the stator lamination 81, where it is rotatably supported on the supports 24, 25 of the support assembly 24A.

The bearings 24, 25 are held by bearing covers 21, 22 at the bearing receptacle 23, which close the stator 80 at the end.

The bearing 24, 25 can be inserted, in particular pressed, into the bearing receptacle 23 of the bearing cover 21, 22. However, it is also possible to overmold or to cast the support elements 24, 25 with the material of the support element covers 21, 22.

For example, bearing cover 21, 22 is fixedly connected, for example screwed, glued or preferably welded, to lamination stack 41 or to a bearing body 90 carrying lamination stack 41.

The bearing covers 21, 22 and the carrier 90 are preferably made of plastic, in particular thermoplastic plastic. Preferably, the same plastic, for example the same thermoplastic, is used for the bearing covers 21, 22 and the carrier 90.

For example, the support 90 is produced in an injection molding process, wherein the lamination stack 81 is cast.

The carrier 90 has a bearing cover accommodating portion 91 for supporting the bearing covers 21, 22. For example, the peripheral wall 26 of the bearing cover 21, 22 (for example, at the end side thereof) can be inserted into the bearing cover accommodating portion 91.

The bearing cover 21 is arranged closer to the output section 34 of the motor shaft 30, 130. The bearing cover 22 is disposed at a region remote therefrom. The bearing covers 21, 22 enclose the stator lamination 81 at longitudinal end regions which are opposite one another. Compared to bearing cover 22, bearing cover 21 projects less far in front of the end face of stator lamination 41, 141. The bearing cover 21 has an accommodating space 21A for the flange body 68.

Support 24 is closer to the lamination stack 41, 81, where the current is likely to be conducted, than support 25.

Nevertheless, the support 24 and the support 25 are electrically conductively connected to the support section 31 and thus to the motor shaft 30, 130, so that there is the inherent risk of a voltage jump from the field coil assembly 86 to the motor shaft 30, 130.

However, the electrically insulating flange body 68 provides a sufficient electrically insulating distance, so that the danger no longer exists.

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

The coil conductors 88 of the excitation coil 87 run in the stator lamination 81 through slots 89 which are arranged, for example, parallel to the axis of rotation D or inclined thereto. The groove 89 has an introduction opening 89D which is open with respect to the inner peripheral edge 82A of the rotor housing portion 82. The groove 89 extends between the end sides 84, 85. Coil conductor 88 can be introduced into groove 89 through insertion opening 89D and wound, for example, around a winding head or a winding weight of stator lamination 81.

Although the section of the lamination stack 81 facing the rotor receptacle 82 of the stator 80, which section is located between the slots 89, is covered by an inner liner 92, for example injection-molded with plastic, the slots 89 are initially open so that the coil conductors 88 can be inserted therein.

Further, the field coil 87 is wound around the support protrusion 93 at the end side 84 of the stator 80, which may be said to form a winding head.

At the opposite end side 85, a support projection 94 is provided, which is likewise suitable for winding with the coil conductor of the excitation coil, however, in some embodiments, no winding is performed.

The end side 85 may be said to represent the coupling side of the drive motor 20, 120. Here, an electrical coupling means 100 is provided, for example a coupling line 15 is coupled or can be coupled to for an electrical connection to the current carrying means 206, 306. The connecting line 15 has a plug connection for plugging into the current-carrying means 206, 306. Coupling mechanism 100 can also be referred to as a terminal.

The connecting line 15 can, for example, be plugged into the connecting means 100 or can also be welded directly thereto. The coupling mechanism 100 has, for example, a coupling contact region 101 designed as a contact projection, to which a coupling plug connected to the coupling line can be plugged. Furthermore, a hole 102 is provided at the coupling contact region 101, through which, for example, a coupling conductor of the coupling line 15 can be guided and welded or otherwise electrically connected to the coupling mechanism 100. For example, welding of such a coupling conductor to the coupling mechanism 100 may be feasible without problems.

The coupling mechanism 100 can be arranged on the carrier 90 by means of a plug-in connection. Carrier 90 has a retainer 95 for a coupling mechanism 100. The holder 95 comprises a plug receptacle 96 into which the coupling mechanism can be inserted. The plug receptacles 96 are arranged between receptacle projections 97 which project in front of the end face 85 of the carrier body 90. For example, the receiving projections 97 have mutually opposite grooves 98 into which the plug-in projections 104 can be inserted before they project laterally into the coupling mechanism 100, for example in the manner of a groove-and-spring connection.

The plug-in projection 104 projects laterally in front of the base body 103 of the respective coupling mechanism 100. The plug-in projection 103 projects transversely to the longitudinal extension of the coupling contact region 101 in front of the base body 103. The plug tab 104 and the coupling contact region 101 form an overall approximately T-shaped arrangement. For example, the base body 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 body 103 are different. Between the base body 103 and the plug-in projection 104, a transition section 106 is provided, for example, which is S-shaped or has a curvature or an arc section opposite one another. Thus, the plug-in projection 104 projects in front of the rear side 115 of the base body 103.

At the free end region projecting ahead of the base body 103, the plug-in projection 104 has a form-fitting contour 105, in particular a tooth 105A, a barb or the like, by means of which it can be held in a form-fitting manner in the plug-in receptacle 96. Preferably, the plug-in projection 104 can be grasped, as it were, in the plug-in receptacle 96 of the carrier body 90 by means of the form-fitting contour 105. In particular, the welding of the carrier 90 in the region of the plug receptacle 96, in particular in the region of the groove 98, with the coupling mechanism 100 being heated (as will be described below), results in a form-fitting connection being established between the plug projection 104 (in particular its form-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.

The teeth 105A have, for example, an overlap, i.e. the teeth 105B project in front of it transversely to the main plane of the plug-in lug 104, for example.

The coupling mechanism 100 has conductor receptacles 107 for receiving the respective sections of the coil conductor 88 to be coupled. The conductor receptacle 107 is formed between a front side 114 of the base body 103 on the one hand and a 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 in one piece. The lateral legs or plug tabs 104 of the base 103 are also preferably integral therewith. The inner side of the connecting section 109 facing the conductor receptacle 107 forms a receiving section or receiving recess 116A of the conductor receptacle 107.

The conductor receptacle 107 has a support surface 107A and a narrow side 107B angled thereto in the region of the receiving recess 116A. Between the narrow side 107B and the large bearing surface 107A, an inclined surface 107C inclined obliquely with respect to the bearing surface 107A and with respect to the narrow side 107B is arranged for supporting the at least one coil conductor 88. The inclined surface 107C can be, for example, a chamfered, curved or arced surface or similar structure. In any event, the inclined surface 107C prevents the coil conductor 88 from lying flat on a sharp edge.

Advantageously, the coupling mechanism 100 is designed as a stamped and bent part which is first stamped out of the base material and then brought into the shape described so far by means of corresponding shaping.

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

first, the conductor receptacle 107 is open in such a way that the receiving arm 108 also projects at a distance from the base body 103, see for example fig. 12 and 14. The coil conductor 88 can reach up to the bottom 116 of the conductor receptacle 107, i.e. the inner circumference of the connecting section 109, see fig. 12, for example. However, this configuration is rather undesirable, so that the coil conductor 88 is held in a position remote from the bottom 116 of the conductor receptacle 107 by additional support measures, for example by the support 251 of the assembly means 250.

Preferably, however, a configuration is used in which the carrier body 90 has a support contour 99 on which the coil conductor 88 is supported when the coupling mechanism 100 is fitted or closed, see fig. 10 and 11. That is, the coil conductor 88 lies flat on the support profile 99 so that it does not touch the bottom 116. The support contour 99 is provided, for example, at 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 respective receiving projection 97 and the part of the carrier 90 from which the receiving projection 97 projects.

The raised position of the coil conductor 88 from the bottom 116 is advantageous for subsequent closing and welding operations. Which is advantageous especially when coil conductors having a small cross section, such as coil conductor 88B (fig. 11), are applied. The coil conductor 88B can have a spacing relative to the base 116 even when the receiving arm 108 is moved toward the base 103, which is significantly heated during the welding process described below, so that it rests with its free end 113 on the front side 114 of the base 103.

Coil conductor 88B forms, for example, a component of field coil 87B of field coil assembly 86B.

The receiving arm 108 has a closing leg 111 at its end region facing away from the connecting section 109, which closing leg projects at an angle from an intermediate arm section 110 of the receiving arm 108. For example, a curved section or connecting section 112 is provided between the intermediate arm section 110 and the closing leg 111. The closing leg 111 projects 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, in the closed state of the conductor receptacle 107, touches the front side 114, while a distance exists between the central arm section 110 and the front side 114 of the base body 103, which distance delimits the conductor receptacle 107.

The welding tongs 252 of the assembly mechanism 250 are used for closing and welding of the coupling mechanism 100. The welding jaw 252 has jaw arms 253, 255, at the free end regions thereof (which are provided for contacting the coupling mechanism 100), bearing surfaces 254, 256 are provided. The free end regions of the gripper arms 253, 255, which are provided for engagement with the coupling mechanism 100, are tapered, i.e. form a tip 257. This pointed, thin design of the gripper arms 253 is advantageous, in particular in the case of the gripper arms 253, which support the rear side 115 of the coupling mechanism 100 with their support surfaces 254.

The gripper arms 253, 254 are arranged V-shaped such that the tips 257 of the sides facing one another act on the coupling mechanism 100 (see fig. 16), close it and then weld it.

Preferably, the longitudinal axes L1, L2 of the gripper arms 253, 255 run at an angle W, in particular at an angle of approximately 20 ° to 40 °. In particular, the tip 257 of the gripper arms 253 can thereby reach into the intermediate space between the bearing cover 22 and the rear side 115 of the coupling mechanism 100 and support the base body 103 with its support surface 254.

The clamp arm 254 acts on the receiving arm 108 in the sense of closing the conductor receiving portion 107. For example, the curved section 112 abuts against a support surface 256 of the jawarms 255. When the support surface 254 is moved toward the support surface 256, the support surfaces 254, 256 are oriented parallel or substantially parallel to each other, which is illustrated in the figures as a feed movement VS. Thus, the gripper arms 253 remain fixed in position and support the coupling mechanism 100 on the rear side, while the gripper arms 255 adjust the receiving arms 108 in the direction of the base body 103. The free ends 113 of their closing legs 111 then come into contact with the front side 114 of the base body 103 of the coupling mechanism 100. Thus, that is, the conductor receiving portion 107 is then closed and the receiving lug 119A is formed.

It is also possible for a welding tong or similar other milling mechanism to shape the receiving limb 108 from an initially longitudinally extending, rectilinear shape (in which, for example, the closing limb 111 is not yet formed) into the receiving limb 108 with the closing limb 111, for example by means of a schematically illustrated deformation contour 259 at the tong limb 255.

The clamping arms 253, 255 are then energized by the energizing means 258 in such a way that the clamping arms 253, 255 have different electrical potentials and thus generate a current flow through the coupling means 100.

The welding current IS flows through the coupling mechanism 100, which IS closed in a so-to-speak annular manner, i.e. through the part of the coupling mechanism 100 that closes off the conductor receptacle 107, i.e. the base body 103 and the receptacle arm 108 in the region of the conductor receptacle 107. The welding current IS flows through the connecting regions 118 and 119, i.e. on the one hand through the connecting 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 not only in the contact region 117 but also in the region of the base 116, which does not however damage the coil conductor 88 or 88B, since it is spaced apart from the base 116, but also from the upper contact region 117. Nevertheless, the coupling mechanism 100 is heated in the region of the conductor receptacle 107 in such a way that the varnish or similar further insulation of the coil conductor 88 melts and comes into electrical contact with the surface of the coupling mechanism 100.

Thus, that is, the coupling mechanism 100 can be said to be mechanically closed and then welded with the coil conductor 88 accommodated in the conductor accommodation portion 107. On the one hand, the assembly is economical for the coil conductor 88, and on the other hand, it can be reliably and permanently loaded, however, because the coil conductor 88 can be slightly mechanically changed by the previously mentioned pressing and welding processes, but is not weakened or changed in its cross-sectional geometry such that it breaks, for example, during operation of the drive motor 20, 120.

When the excitation coil 87 is put into the groove 89, it is closed by the groove cover portion 180.

The trough 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.

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

The trough cover 180 or the profile body 181 has a longitudinal profile and extends along a longitudinal axis L8, which longitudinal axis L8 runs parallel to the longitudinal axis L9 of the trough 89 when the trough cover 180 is fitted in the trough 89. A longitudinal narrow or longitudinal side 195 of the slot cover portion 180 extends along the longitudinal axis L8. The longitudinal sides 195 have a transverse spacing Q transverse to the longitudinal axis L8.

The longitudinal end region 183 of the slot cover 180 preferably projects ahead of the stator lamination 81 as far as the support 90, so that electrical insulation is provided over the entire length of the slot 89. Here, for example, adhesive bonding, welding or similar other fastening means at one or both of the carrier cover 21 or 22 is advantageous.

The groove cover 181 has a wall section 184 which completely covers the groove 88 transversely to the longitudinal axis L8. The wall section 184 is approximately U-shaped or curved in cross section (that is to say transverse to the longitudinal axis L8) and at its transverse end regions (that is to say transverse to the longitudinal axis L8) is configured with form-fitting projections 186 which are provided for engagement into the form-fitting receptacles 89B of the groove 89. Transversely to the longitudinal axis L8, the slot cover 180 has two form-fitting receptacles 186 which form a section of the slot cover 180 projecting furthest transversely to the longitudinal axis L8 and/or lie opposite one another. The form-fitting projection 186 and the form-fitting receptacle 89B form a form-fitting contour 185, 89A which holds the trough cover section 180 in the trough 89 transversely to the longitudinal axis L8, which longitudinal axis L8 at the same time exhibits the longitudinal axis of the trough 89.

The wall sections 184 form a basin-shaped contour between the form-fitting contours 185, i.e. have a bottom 187. The bottom 187, for example, rises into the corresponding groove 89, that is to say extends into it. Obviously, the opposite configuration would also be possible, in which the wall sections 184 do not project radially outwards, but radially inwards, with respect to the axis of rotation D. Here, it may interfere with the rotors 40, 140.

The lateral legs 188 extend away from the wall section 184. The lateral legs 188 are inclined towards one another, that is to say their free end regions remote from the wall section 184. The lateral leg 188 and the wall section 184 thereby form a form-fitting contour 185, i.e. a form-fitting projection 186, which is V-shaped in side view, in the transition region to the lateral leg 188.

The assembly of the slot covering section 180 is designed as follows:

however, it would also be possible to push the groove cover 180 into the respective groove 89, for example from one of the end faces 84 or 85, in this case, i.e. along a plug-in axis running parallel to the axis of rotation D. However, the positive fit contours 185 can be moved toward one another transversely to the longitudinal axis L8, so that the transverse spacing Q between the positive fit contours 185 can be reduced, so that the trough cover 180 can be displaced past the side edges 89C of the trough 89 into the trough 89, see fig. 21 to 23 for this. Here, the rounded outer side 189 of the wall section 184 (i.e., at its side opposite the base 187, which in this respect forms the pressing contour 189A) slides past the side edge 89C, wherein the wall section 184 yields in a bending-flexible manner, in this respect, forms a bending-flexible section 194. Here, the lateral legs 188 and the form-fitting profile 185 are moved toward one another in the sense of narrowing the transverse distance Q and finally, at the end of the plugging movement SB, the groove cover 180 snaps into the groove 89, i.e. the form-fitting profile 185 comes into engagement with the form-fitting profile 89A.

The groove cover section 180 is then accommodated in the groove 89 with a form fit, i.e. in two mutually orthogonal directions transverse to the longitudinal axis L8.

The face of the form-fitting receptacle 89B facing away from the rotor receptacle 82 forms a rear gripping contour 89E. The face of the form-fitting receptacle 89B facing the rotor receptacle 82 forms a support contour 89F.

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

Preferably, the rear gripping profile 89E and/or the support profile 89F support the trough cover portion 180 over its entire longitudinal axis L8.

The lateral leg 188 has a rear gripping surface 188A that is supported at the rear gripping contour 89E. The section of the wall section 184 adjacent to the lateral leg 188 has or forms a support face 188B which is supported at the support contour 89F. The rear gripping contour 89A thereby supports the groove cover 180 in the direction towards the inner space of the rotor receptacle 82 or in the direction of the axis of rotation D and the support contour 89F in contrast thereto, that is to say in the radially outer direction with respect to the axis of rotation D or the bottom of the respective groove 89.

The advantage of the described construction method is also obtained in that, when the groove cover 180 is assembled, the carrier 90 can project slightly radially inwardly in the direction of the rotor receptacle 82, for example, in 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 towards the protruding section of the carrier body 90.

Furthermore, the rear gripping surface 188A and the rear gripping contour 89E and the support surface 188B and the support contour 89F bear flat against one another, so that a sealing of the sealing seat or groove 89 and/or the groove cover 180 sealingly closes the groove 89 is achieved.

Advantageously, the groove cover 180 has a sealing function for sealing the groove 89, however, has no supporting function for the field coil 87 of the field coil assembly 86. More precisely, the inclination of the rear gripping contour 89E and of the rear gripping surface 188A acts even in the sense of a disengagement ramp which, in the event of a force loading of the trough cover section 180, promotes a deformation or narrowing of the trough cover section 180 in the direction out of the trough 89 or radially inward with respect to the axis of rotation D and thus effects or simplifies its disengagement from the trough 89.

According to an alternative embodiment of fig. 23B (which is only schematically illustrated), a groove 489 is provided, for example, which is designed as an alternative to groove 89, groove cover 480 being brought into groove 489. The groove cover 480 has a form-fitting receptacle 486 at its longitudinal narrow side, which is in engagement with a form-fitting projection 489B of the groove 489. The form-fitting protrusions 489B face each other. The form-fitting accommodation 486 and the form-fitting projection 489B are complementary to each other, for example V-shaped complementary to each other.

The face of the form-fitting protrusion 489B facing away from the rotor housing 82 forms a rear grip contour 489E. The face of the form-fitting protrusion 489B facing the rotor housing 82 forms a support contour 489F. The rear gripping profile 489E and/or the support profile 489F are preferably planar. Preferably, the rear gripping profile 489E and/or the support profile 489F support the trough cover 480 throughout its longitudinal axis L8. The longitudinal sides or form-fitting receptacles 486 of the trough cover 480 have rear gripping surfaces 488A which are supported at the rear gripping contour 489E. The positive-locking receptacle 486 furthermore has or forms a support surface 488B, which is supported on the support contour 489F.

The mechanical structure of the stator 80 is preferably fully 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 to say have, for example, equal diameters. The design of the groove 89, that is to say, for example, its form-fitting contour 89A and/or its width and/or depth, is also equivalent. It is also advantageous if the slot cover 180 is designed and/or arranged at the stator 80 independently of the field coil assembly 86 for the application or enabling of the voltage P1 or the voltage P2. Thereby, a large degree of generic part principles can be achieved.

It is possible to provide the groove cover 180 as a single profiled element, that is to say it already has the longitudinally extending profile shown in fig. 20 and has a length corresponding to the length of the groove 89.

However, an advantageous embodiment provides that the slot cover 180 is obtained from a web 190. The web 190 is prepared, for example, as a reel 191. The reel 191 is rotatably accommodated, for example, at the reel carrier 273, in particular at the respective holding rack. The unwinding mechanism 274 unwinds the web 190 from the spool 191.

A section 192 of web 190 unwound from reel 191 passes over a roller assembly 275, for example, having one or more rollers, particularly reversing rotors or guide rollers.

Downstream of the roller assembly 275, a flattening mechanism 276 is provided in which the segments 192 are flattened so that their initial contour around the spool 191 is converted into a longitudinally extending contour. The flattening device 276 comprises, for example, at least one pressing unit 277, in particular pressing units 277 lying opposite one another, and/or a heating device 278 with a heating body 279, in order to bring the web 190 of the section 192 into a longitudinally extending profile, as is shown in fig. 20. Thus, that is, the web 190 is brought into a linearly longitudinally extending shape by the flattening mechanism 276.

Coupled to the flattening device 276 is a cutting device 280, by means of which the section 192 is dimensioned correspondingly to the desired length of the slot cover 180 (that is to say to the length of the lamination stack 81 or the carrier 90, for example). The cutting mechanism 280 has, for example, a cutting unit 281, in particular a knife, a blade, a sawing unit or the like.

In this connection, it should be mentioned that instead of the lamination stack 181 or the stator 80, other, that is to say shorter or longer, stators can be provided with a slot cover by means of the assembly means 270. If necessary, that is to say, a suitable slot cover 180 is produced accordingly, the length of which is adapted to the length of the stator to be provided. That is, a cutting unit 280, for example a cutting knife, cuts out the groove cover 180 from the section 192 in each case, which is then gripped by the holding unit 271 and inserted into the stator 80.

The holding unit 271 (e.g., a gripper) comprises a holding arm 272 which grips the profile body 181 or the trough cover 180 at its longitudinal end region 183 and can be inserted into the trough 89 by means of a plugging movement SB. It would be possible without problems for the retaining unit 271 to have a suction mechanism or similar retaining element which sucks the trough cover 180 in the region of the bottom 187 and inserts it into the trough 89 with the force component which generates the plugging movement SB.

That is, it is known that important components of the motor 20, 120, i.e. for example the coupling mechanism 100, the cover of the groove 89 by means of the groove cover 180, can be produced by plugging, joining, pressing and the like.

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

That is, the magnet 51 is not magnetized first when it is assembled to the rotor 40, 140 or the lamination stack 41, 141. That is to say, when the magnetic body 52, which is also non-magnetic, is inserted or pressed into one of the holding receptacles 45 in the region of the insertion process or the pressing process, the magnetizable material 51A of the respective 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).

At the holding receptacle 45, for example, a support projection 48 is provided, which supports a narrow side 54 of the respective magnetic body 52. The narrow side 54 runs parallel to the axis of rotation D in the state in which the magnet 50 is mounted on the rotor 40, 140. Preferably, the magnetic body 52 or the magnet 51 is sandwiched between the support protrusions 48.

Between the narrow sides 54, a planar side 53 of a larger area extends relative to the narrow sides 54. The normal direction of the planar side 53 is preferably radial to the axis of rotation D.

The lamination stack 41, 141 has a holding projection 49 for holding the magnetic body 52. The retaining projection 49 projects, for example, up to the flat side 53 and rests with its free end region on the flat side 53. Preferably, the holding protrusion 49 and the magnetic body 52 grip and/or form the abutment protrusion, as it were.

The laminations 43 of the lamination stack 41, 141 comprise the laminations 43 having the recesses 59A in a predetermined angular position with respect to the axis of rotation D. The recess 59A preferably extends radially away from one of the planar sides of the respective retaining receptacle 45 with respect to the axis of rotation D, for example radially inwardly towards the axis of rotation D. Preferably, the recesses 59A are arranged in succession along the axis parallel to the axis of rotation D, that is to say flush with one another. Some of the laminations 43 have retention tabs 59 that project into the pockets. The retaining projections 59 furthermore project into the plug-in cross section of the respective retaining receptacle 45, so that they come into engagement with the magnetic body 52 when the magnetic body 52 is inserted into the retaining receptacle 45 and are bent by the magnetic body 52 in a plug-in direction SR, in which the magnetic body 52 is inserted into the retaining receptacle 45. In this case, the retaining projection 59 can be pressed into the recess 59A of one or more adjacent laminations 43. The end sides of the respective retaining projections 59 (which have the width of the narrow sides of the laminations 43) are then supported obliquely inclined at the flat sides 53 of the magnetic body 52 and prevent the magnetic body 52 from being pulled out of the retaining receptacle 45 counter to the plugging direction SR.

Preferably, the magnetic body 52 or the magnet 51 is accommodated in a holder in the holding accommodation portion 45. Obviously, adhesive bonding, welding or similar other assembly is fully feasible. That is, the magnetizable material 51A is inserted into the respective lamination stack 41, 141 in a not yet magnetized state.

Thereafter, the rotors 40, 140 are balanced by means of a balancing mechanism 285. Here, the motor shaft 30, 130 and, if appropriate, the insulating sleeve 60 have already been assembled. That is, therefore, the rotors 40, 140 can be rotated about their rotational axes D by the motor shaft 30, 130 by the motor 286. The measuring means 287 determines, for example, an imbalance of the rotors 40, 140.

The imbalance that still exists is then eliminated, for example, by producing at least one balancing part 55 by means of a material-reducing mechanism 288 (for example, a grinding mechanism, a milling mechanism or the like). In this case, the material of the stack 41, 141 is etched, for example, at the locations where balancing is necessary, wherein shavings, metal powder or the like are produced. However, this is not problematic because the magnetic body 52 is not yet magnetized when the material of the laminated sheet group 41, 141 is processed. Shavings, powder or the like produced by etching of lamination 43 do not adhere magnetically at lamination stack 41, 141, so that they can be easily removed. That is, then, when the drive motor 20, 120 is operated later, there is no metal swarf or powder that could damage, for example, the bearing 24 or 25.

Advantageously, the balancing portion 55 is arranged at a region of the lamination stack 41, 141, where the lamination stack 41, 141 has as great a material strength or thickness as possible in the radial direction with respect to the axis of rotation D (that is to say, in particular, radially on the outside with respect to the magnet 51). That is to say, when, for example, an imbalance U occurs at a region which is disadvantageous for the production of the balancing portion, a vector balancing is preferred in which the imbalance U is decomposed into force vectors Ux and Uy and which are correspondingly established radially on the outside at the lamination stack 41, 141 by means of a material-reducing mechanism 288 (for example the balancing portions 55x and 55 y). The balancing portions 55x and 55y are located, for example, radially on the outside at the lamination stack 41, 141 of the retaining receptacle 55, which is arranged directly beside it at an angular distance from the imbalance U.

In the case of the rotor 40, 140, no balancing bodies or weights are required at the end side 44. Thus, for example, the inflow opening and the outflow opening of the air duct 46 are not covered by a balancing weight or a balancing body. Furthermore, the air can also flow past the magnet 51 in the lateral direction, i.e. through the air channel 46A, which is provided at the holding receptacle 45 or is provided through the holding receptacle 45. The inflow opening and the outflow opening of the air passage 46A are also not covered by the balance body or the balance weight.

The cleaning means 289, for example a blowing means, a brushing means and/or a vacuum cleaner or the like, is able to remove without any problem the metallic particles generated by the material-reducing means 288 during the material etching from the rotor 40, 140 (in particular the respective lamination stack 41, 141) as long as the magnetic body 52 is not magnetic. For example, the cleaning mechanism 289 generates an air flow LU that removes swarf and the like from the area of the balance portion 55.

When the rotors 40, 140 are balanced, they are magnetized by the magnetization unit 290, i.e., in particular the magnetic body 52 is magnetically activated. The magnetization mechanism 290 has, for example, magnetized heads 291A, 291B, 291C, 291D.

For example, the magnetization unit 290 comprises a positioning unit 292, which positions, in particular rotates, the motor shafts 30, 130 in such a way that the magnet 51 is angularly exactly opposite the magnetized head 291.

Advantageously, the rotor 40, 140 is positioned with respect to the magnetized heads 291A, 291B, 291C, 291D by means of the mechanical coding 57 in such a way that in each case one magnetized head 291A, 291B, 291C, 291D is arranged between adjacent magnets 51.

For example, the rotation prevention contour 74 serves as a coding 57 which is stopped, for example, at a stop 293, in particular a rotational stop, of the magnetization unit 290, so that the rotational angle of the rotor 40, 140 is correctly arranged with respect to the magnetized head 291. Stop 293 is shown in conjunction with balancing mechanism 285. Without any problem, however, other components of the rotor 40, for example the air channel 46, into which a corresponding stop of the magnetization 290 can engage and/or which can be detected optically, can also be used as the coding 57. Advantageously, an optical detection of the rotational angular position of the rotor 40, 140 is also possible, for example by means of a camera or similar other optical sensor of the magnetization 290.

The magnetized heads 291A, 291B, 291C, 291D produce magnetic fields MFA, MFB, MFC, MFD which pass through magnetic bodies 52 or 51 arranged alongside one another about the axis of rotation D at an angular spacing, so that said magnetic bodies 52 or 51 are permanently magnetized and constitute magnetic poles, which are denoted as north poles N and south poles S. The magnetic fields MFA, MFB, MFC, MFD are illustrated in the figures as dashed field lines with arrows corresponding to the direction of their magnetic flux.

When the magnet 51 of the rotor 40, 140 is magnetized, the rotor 40, 140 is assembled at the stator 80.

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, the magnetization of the corresponding magnetic body 52 is also possible without any problem when it has been accommodated in the holding accommodation portion 45.

When the magnetization is carried out by the magnetization 290, it is also advantageous if the laminations 43 of the lamination stack 41, 141 are magnetically conductive, so that they can optimally guide the magnetic field 292 of the magnetization 290 through the magnetic body 52.