EP3455521A1

EP3455521A1 - Drive system for driving a component having an electric motor unit and a transmission unit

Info

Publication number: EP3455521A1
Application number: EP17736588.9A
Authority: EP
Inventors: Christian Loesch; Frank Anton; Robert Goraj
Original assignee: Siemens AG
Current assignee: Rolls Royce Deutschland Ltd and Co KG
Priority date: 2016-06-28
Filing date: 2017-06-26
Publication date: 2019-03-20
Also published as: US10774925B2; CN109328277A; DE102016211559A1; WO2018001962A1; US20190154140A1

Abstract

The invention relates to an electric motor equipped with a transmission unit, for example in the form of a planetary gear transmission. The planetary gear transmission has a sun gear, a plurality of planetary gears, and a ring gear, which are coupled to one another via corresponding toothings. The sun gear is coupled directly to a shaft of the electric motor and is fastened thereto. The planetary gears or the axles thereof are retained on a bearing plate of the electric motor, such that the transmission unit does not have to provide any additional components for this purpose. In one embodiment of the planetary gear transmission, the ring gear is rotatably mounted on the housing of the electric motor. In an alternative embodiment, the ring gear is fastened to the housing of the electric motor. A common feature of the two embodiments is that the parts of the transmission are retained on the housing of the electric motor, which housing is available in any case, in particular on the bearing plate thereof, and not on a separate housing or another component of the transmission unit.

Description

description

Drive system for driving a component with a

Electric motor unit and a transmission unit

The invention relates to a equipped with a gear ^¬ th engine, in particular an electric motor.

The power P of an engine can be combined with Ρ = Μ * ω describe, where M is the Winkelge ^¬ speed indicates the torque of the motor, and ω = 2πη at a rotational speed n of the engine. The power P can thus obviously be provided by a high torque M and / or a high speed n. Low Rotating direct drives, that is, actuators that are operated with clotting ^¬ ger speed n and which are coupled directly to the driven component, have a high rotational moment ^¬ and are operated at the same speed as the driven component. Therefore, these drives have the advantage that they can do without an additional gear. On ^¬ due to the demand for a high torque but these motors are usually very heavy.

For high-speed motors, however, results in the advantage that a torque, which is inversely proportional to the rotational ^¬ figure, is sufficient to provide the same performance. The higher the speed is selected, the lower is the torque required to provide the same power. Since torque is scaled by a factor that depends on the air gap diameter of the motor and its active length, that is, the dimensions and size of the motor and, as mentioned above, lower torques are sufficient to provide the same power in high speed motors, high speed motors can be built relatively small and accordingly take a smaller

Space and have a smaller mass. In these high-revving engines, however, there is the after part, that these high speeds must be re-stocked by a suitable gear in the actually usable speed. Such a transmission continues ^¬ typi cally made of a plurality of components together, for example, gear wheels, for cooling components, housings, fasteners, etc. location approximations, and therefore the use of such a gear in a consequence in a significant additional mass results. The actual mass advantage of the high-revving engine over the direct drive can be lost due to the possibly be needed transmission and the associated additional mass again.

Another difficulty of the high-revving engine is because in certain applications, for example in wheel hub motors or propeller drives, it would be advantageous if the output side were located on the outside, as in an external rotor motor. However, in particular in the case of high-speed engines, limitations arise with regard to the realizable outer diameter of the rotating shaft and of the rotor due to the centrifugal forces occurring during rotational movements. Thus, in these applications with external rotor on the weight advantage of the high-revving engine and has to be passed to the heavier version of the external rotor motor as a direct drive. Alternatively, a gearbox would have to be used in combination with the high-revving engine which, however, in turn introduces an additional mass.

Typically, a transmission is usually available as an independent component Kom ^¬ which fertilize with corresponding terminals, and fits Anbin is coupled to the motor. Here be ^¬ interpreted as already indicated, the various transmission components additional mass. Furthermore, a transmission usually has a flange o.ä. to which the unit to be driven, such as a propeller or a wheel, is coupled, the flange itself and the components associated with it, such as bearings, various screws, housings, etc., again having corresponding masses relative to the total mass of the system. drive system, which ultimately has a negative effect on the achievable power density.

It is therefore an object of the present invention to provide a way to reduce the total mass of a drive best ^¬ starting from an engine, in particular a high-revving engine, and a transmission.

This object is achieved by the drive system described in claim 1. The dependent claims describe advantageous embodiments ^¬.

An inventive driving system for driving a component comprises an electric motor unit for generating and loading riding make a rotational movement with a first rotational frequency and a transmission unit for transmitting the bereitge ^¬ set rotational movement to the component at a second rotational frequency. The electric motor unit includes a Ge ^¬ housing with at least one bearing plate which is to ^¬ arranged at a first axial end of the housing of the motor unit and is supported at which a shaft of the motor unit that performs the BE ^¬ riding provided by the electric motor unit rotating movement and in turn be ^¬ riding. The gear unit has a first gear which is rotationally fixed and connected directly to the shaft of the electric motor ^¬ unit, wherein the first gear is preferably outside of the motor housing. Furthermore, the Ge ^¬ gear unit comprises at least a second gear wheel on which is so coupled directly or indirectly with the first gear, the second gear rotates along with rotation of the first gear, said second gear for transmitting be ^¬ riding detected rotational movement directly or indirectly with the component to be driven can be coupled. Each of the second gears is finally held on the housing of the electric motor unit, in particular on a housing cover or end shield of the Ge ^¬ housing of the electric motor unit, such that the position of the respective second gear in relation to the electric motor unit does not change during operation of the drive system.

The essential point here is that the second gear or the second gears is or are held on the already existing housing of the electric motor unit, in particular on its end shield, and not on a separate housing or other component of the gear unit. Here, the term "position" only example. The coordinates of the center of gravity of the respective gear in ei ^¬ nem Cartesian or other suitable coordinate system. The term "position" but does not include a possible rotation about the axis of rotation of the gear. This is described by the term "position." In other words, the position of the gear does not change when the gear rotates, but the position of the gear changes, whereas if the position of the gear is changed, the gear is not rotated , one can assume that the "situation" remains unchanged.

This integration of electric motor unit and gear unit established particularly advantageous in the execution of the transmission unit as a planetary gear. A planetary gear usually has a so-called sun gear, several Um ^¬ wheels and a ring gear, the planetary gears are arranged in radial ^¬ aler direction between the sun and ring gear, wherein toothings of the planetary gears both in the teeth of the sun gear driven by a shaft and in the Teeth of the ring gear grip. Sun gear and ring gear, however, are not directly in contact with each other, but only indirectly via the planet gears.

The mentioned integration of electric motor unit and transmission unit is advantageous both in a first embodiment of the planetary gear with fixed planetary gears as well as in a second embodiment with a fixed ring gear. The shaft of the electric motor unit and the so-called sun wheel of the planetary gear lie radially in the middle and are di ^¬ rectly connected to each other. Since the electric motor unit and the planetary gear require a housing part that receives the bearings or the planetary gears, these two functions are now combined accordingly.

In a first embodiment, the gear unit is a planetary gear with stationary planetary gears, wherein the first gear of the gear unit is the so-called sun gear of the planetary gear. There are a plurality of second gears present, which represent the epicyclic gears of the planetary gear ^¬ , in particular fixed planetary gears, each of which on the housing of the electric motor unit, in particular on the bearing plate of the housing of the electric motor unit, held rotatably about their respective fixed axes, ie in the Position variable, but with a fixed position, that their centers distributed over the circumference of a circular ring K lie ^¬ gene whose center lies on a rotation axis R of the first gear and its surface, ie the area enclosed by the circular ring, perpendicular to the axis of rotation R of the first Gear stands. This arrangement of the second gears and the planetary gears is common in a planetary gear with fixed planetary gears. The transmission unit has a further, radially outer and rotatable gear, which is the so-called ring gear of the planetary gear and which is coupled to di ^¬ rectly or indirectly with the second gears that said further gear wheel rotates along with rotation of the second gears. In this case, the further toothed wheel for transmitting the provided rotational movement can be coupled directly or indirectly with the component to be driven. Accordingly, therefore, the second gears are coupled in this embodiment indirectly with the component to be driven. As is known, the epicyclic rotates only about their axes of rotation in the planetary gear with fixed planetary gears, ie they change their position during operation, but not their position. The further gear or the ring gear surrounds the planetary gears and the sun gear in the middle of the Anord ^¬ tion. Upon rotation of the sun gear, the ring gear is rotated via the planet gears in rotation. The ring gear also retains its position, but changes its position.

The further gear or the ring gear is mounted rotatably via a bearing device mounted on the housing of the electric motor unit, in particular on the casing and / or on one of the end shields. The bearing device can, for example, have a bearing ring which is arranged so as to encompass the housing along its circumference.

The outer ring gear now serves as output with the ent ^¬ speaking reduced speed. The housing of the motor unit is therefore used not only as a support for the Components ^¬ th of the motor unit inside the housing, for example. The stator and rotor, but also as a support for the bearing for the rotation of the ring gear. This bearing, which carries the ring gear and allows its rotation, sits, for example, on the outside of the electric motor unit or can be mounted on La ^¬ shield. By storing on the housing of the electric motor unit can be dispensed with additional devices for supporting the required bearing and thus weight and space can be saved.

The bearing device has two or more bearing rings or the like. on, which are spaced apart in the axial direction of the housing, in particular on the housing shell, the electric motor unit and the housing along its circumference are placed. This arrangement allows rotation of the anzutrei ^¬ reproduced component to the electric motor unit, wherein the Ge ^¬ housing of the motor unit takes over the role of this rotation support carrier. The distance between the bearing rings then depends in particular on the dimension of the component to be driven in the axial direction.

At least two of the axes of the second gears, in particular the ends of the axes facing away from the electric motor unit, are connected to each other via an annular support ring, whose center lies on the axis of rotation of the wide ^¬ ren gear and whose surface is perpendicular to the rotation ^¬ tion axis of the other gear. The additional gear or the ring gear is rotatably mounted in addition to or alternatively to the bearing on the housing of the electric motor unit by means of a bearing ring on the support ring.

The above-mentioned integration is also advantageous in the execution of the transmission unit as a planetary gear with a fixed ring gear. Again, the shaft of the electric motor unit and the sun gear of the planetary gear are radially in the middle and are directly connected. The mounted on the housing of the electric motor unit Lagerervor ^¬ direction is designed so that they not only the

Ring gear, but can also carry the component to be driven, so that it is rotatable in consequence to the housing of Elekt ^¬ romotoreinheit. Thus you save yourself an otherwise often necessary flange.

In a second embodiment, the gear unit is a planetary gear with rotating planetary gears and stationary ring gear. The first gear of the gear unit is again the central sun gear of the planetary gear, while the second gear represents the radially outer ring gear of the plane ^¬ tengetriebes. The ring gear is fixed, ie esp. Not rotatable, that is held immutable in the position on the housing of the electric motor unit, ie it changes neither its position nor its location. The gear unit has a plurality of other gears, which are arranged between sun ^¬ wheel and ring gear and represent the so-called Umlaufrä ^¬ of the planetary gear, which couple the sun gear and the ring gear together. The other gears are in particular formed as a circumferential external gears which are each arranged on the housing of the motor unit, in particular at an axial end of the housing of the electric motor unit ^¬, eg. On the bearing plate that IH- Re centers are distributed over the circumference of a circular ring K, the center of which lies on a rotation axis R of the first gear and whose surface, ie the area enclosed by the circle ^¬ ring K, is perpendicular to the rotational axis R of the first gear. The other gears are further mounted on the housing of the electric motor unit and the first gear directly or indirectly ge ^¬ coupled that they rotate about their respective axes with rotation of the first gear, ie change their position, and that at the same time their centers during rotation of the first gear along the circumference of the circular ring K bewe ^¬ gene, ie they change their position, so that the entirety of the other planetary gears performs a rotational movement about the axis of rotation of the sun gear, which is transferable to the component.

Thus, the entirety of the second gears in this embodiment is coupled directly to the component to be driven. This arrangement of the other gears or planetary gears is common in a planetary gear with a fixed ring gear. The planetary gears are changeable both in their position and in their position, while the ring gear position and position are unchangeable. As is known, perform at planetary gear festste ^¬ hendem ring gear, the planetary gears, both a rotational movement about their respective own axis as well as simultaneously a change in position along the periphery above introduced

Annulus. The ring gear is fixed and does not change its position during operation of the transmission neither its position nor - in contrast to Pla ^¬ Netengetriebe with fixed Umlaufrädern- its position. During rotation of the sun gear, the planetary gears in turn are set in rotation about their axes and roll off on the ring gear, which surrounds the arrangement of the central sun gear and the planetary gears surrounding the sun radially on the outside. The axes of the planetary gears are guided along the circumference of the annulus by means of appropriate guides or bearings, etc. On the housing of the electric motor unit, in particular on an axial end, for example. On the bearing plate, a guide device is provided, with those ends of the axes of the other gear wheels, which are facing the electric motor unit, are feasible such that the centers of the other gears move during rotation of the first gear along the circumference of the annulus. The guide device comprises an annular web attached to the housing of the electric motor unit, in particular on the jacket and / or on one of the end shields, with a bearing ring and a retaining ring. The retaining ring is rotatably mounted on the bearing ring about the axis of rotation of the first gear. The ends of the axles of the further toothed wheels facing the electric motor unit are also fastened to the retaining ring, so that the retaining ring rotates about the rotation axis R during a rotation of the entirety of the further toothed wheels. This training of the guide device with on the housing

Electric motor unit arranged parts represents a further advantageous aspect of the integration of electric motor unit and gear unit. At the electric motor unit remote from the ends of the axes of the other gears, a transmission device is attached, which is coupled to the component to be driven to transmit the rotational movement to the component. It can be the transmission apparatus, advantageously, the retaining ring of the guide device, so that, in turn, may be increased because of the multiple function of the retaining ring of the Integra ^¬ tion degree. In a third embodiment, the gear unit is designed as a spur gear. The spur gear has a first drive-side spur gear and a second,

output-side spur gear, wherein the first gear of the Gear unit represents the first, drive-side spur gear and the second gear is the second, output-side spur gear. The second gear is rotatable on the housing of Elektromo ^¬ gate unit around its fixed axis, ie in a position kept variable, but with fixed position.

The concept underlying the invention is to save mass by functional integration of the transmission components in and on the motor housing. As a result of this integration, the motor can also be operated as a "quasi-external rotor motor".

The core lies in the unconventional integration and combination of the transmission components in or on the electric motor. The mass advantage of high-speed motors can be further improved by sharing functional parts such as housing ^¬ components for the transmission and the electric motor, thereby saving many, otherwise independent, components. The otherwise necessary connection elements are also eliminated.

The solution to the problem makes it possible to exploit the conceptual advantages of the high-revving engine and to enable a total drive concept with very high power densities, typically expressed in kW / kg. For example. For aviation based on electrical drives power densities in the order of 25kW / kg are necessary and the concept presented here offers one of several, even mitei ^¬ combined, approaches to increase the power density accordingly.

Further advantages and embodiments will become apparent from the drawings and the corresponding description. In the following the invention and exemplary embodiments will be explained in more detail with reference to drawings. There, the same components in different figures are identified by the same reference numerals. Show it:

1 shows a first embodiment of a drive system with a planetary gear with stationary circulating ^¬ wheels and rotatable ring gear formed gear unit,

2 shows a variant of the first embodiment,

3 shows a second embodiment of the drive system with

Planetary gear unit with rotating planetary gears and stationary, non-rotatable ring gear, a third embodiment of the drive system with a trained as a spur gear Getriebeein unit.

Like reference numerals in different figures indicate like components. It is also noted that terms such as Be ^¬ "axial", "radial", "circumferential direction", etc. refer to the in the respective Figure and in the example described, respectively, the used shaft or axis. Furthermore, the term "position "Only, for example, the coordinates of the center of gravity of the respective gear in a Cartesian or any other suitable coordinate system. However, the term "position" does not include a possible rotation about the axis of rotation of the respective gear wheel, this is described by the term "position". In other words, the position of the gear does not change when the gear rotates, but the position of the Zahnra ^¬ des. If, however, the position of the gear would be changed, but the gear while not rotated, one can assume that the situation remains unchanged.

The toothings of the various gears are not shown for clarity. 1 shows a perspective sectional view of a first embodiment of a drive system 10 with an electric motor unit 100 and a transmission unit 200.

For the sake of clarity, in FIG 1 and in the übri ^¬ gen figures, some components of the motor unit 100, which are required for the actual operation, but which are not relevant to the description of the invention, not shown in the figures. This relates, for example, to a rotor and a stator of the electric motor unit as well as electrical connections, via which electrical currents can also be conducted to coils, likewise not shown, of the stator. These components are typically located in or on the housing 120 of the electric motor unit 100 and cause a due to an electromagnetic interaction between the stator and rotor torque is transmitted to a shaft 110 of the electric ^¬ motor unit 100. The electric motor unit 100 thus produces a rotational movement with a first rotational frequency or speed, the bereitge ^¬ represents using the shaft 110 for further use outside of the motor unit 100 is, in particular for driving a component to be driven, eg., A propeller or a wheel. the housing 120 of the motor unit 100 consists of two We ^¬ sentlichen at the axial ends of the housing 120 arranged housing lids 121, 122, for example. as end shields 121, 122 may be formed. Such bearing plates 121, 122 on the one hand protect the housing 120 and in particular its interior against contamination and / or contact and on the other hand bear the bearings 124, 125 of the ends of the shaft 110. Each of the bearing plates 121, 122 may be an independent part or with the housing 120 may be made of a block, for example. As shown in the figures as a "pot".

The end shield 121 is located in the example shown here on the output side of the electric motor unit 100 at which is also the transmission unit 200 to be described below. In addition to the housing covers 121, 122 or end shields 121, 122, the housing 120 has a

Housing jacket 123 which extends between the housing covers or end plates 121, 122 in the axial direction. The housing jacket 123, together with the end shields 121, 122, essentially forms a cylindrical housing 120, which is closed off in the axial direction by the bearing plates 121, 122 and in the radial direction by the housing jacket 123.

The function of the transmission unit 200 is to convert the ready ^¬ provided by the electric motor unit 100 or from the shaft 110 rotation to a second rotational frequency or speed and transferring this rotational movement directly or indirectly to the driven component. In this case, the second rotational frequency is preferably lower than the first rotational frequency, since the electric motor unit is ideally operated at high frequency or rotational speed as described in the introduction. For example. The electric motor unit can be operated at a first speed of 1500 revolutions per minute, while for the component, for example. A propeller, a second speed in the amount of 2500 revolutions per minute is required ^¬ tigt. In the figures, the transmission unit 200 is explained in various embodiments as a planetary gear or as Stirnradge ^¬ gear. A planetary gear usually has a so-called sun gear, a plurality of planetary gears and a

Ring gear on, the planetary gears are arranged in the radial direction between the sun gear and ring gear and wherein Zahnun ^¬ conditions of the planet gears both in the teeth of the shaft driven by a sun gear and in the toothing of Hohlra ^¬ grab. The intermeshing of the different teeth causes a direct coupling of the respective gears, so that rotations can be transmitted between the coupled gears. Sun gear and ring gear or their toothings are not directly in contact with each other, but are indirectly coupled together using the planetary gears. in the Case of the planetary gear with fixed planetary gears, which is shown in Figures 1, 2, they are changeable only in their position, but not in their position, ie they can rotate about their axis, but remain with respect to the drive system 10 always on the same position. In the alternative embodiment of the planetary gear with festste ^¬ Hendem ring gear, which is shown in FIG 3, the ring gear is designed as a fixed gear, which does not rotate during operation of the transmission, while the epicyclic change both their position and their position.

In the embodiment shown in FIG 1 the first embodiment of the drive system 10, the transmission unit 200 may be configured as a planetary gear ^¬ with fixed planetary gears.

Specifically, the gear unit 200 or the Planetenge ^¬ gear 200 a first gear 210 which rotatably and verbun ^¬ directly with the shaft 110 of the electric motor unit 100 is the, so that the first gear 210 rotates during rotation of the shaft 110. The first gear 210 of the transmission unit 200 provides the so-called. Sun gear 210 of a planetary gear being formed ^¬ gear 200 is.

In addition, the planetary gear 200 has a group 220 with a plurality of second gears 221, 222. In fact, it is assumed that group 220 is not only the Darge ^¬ presented two second gears 221, 222, but comprises at least an additional second gear which is not shown, since the corresponding part of the drive system 10 due to the sectional view not in the figure is included. The second gears 221, 222 represent the epicyclic gears of the planetary gear 200 and are directly coupled to the first gear 210 such that the second gears 221, 222 rotate with rotation of the first gear 210, ie change their position.

The second gears 221, 222 and the planetary gears 221, 222 are on the housing 120 of the electric motor unit 100 and in particular der rotatably held on the first end plate 121 about a respective axis 226, 227 that the position of the respective second gear 221, 222 with respect to the drive system 10 does not change during operation of the drive system 10. The planetary gear 200 can therefore also be referred to as a planetary gear with fixed planetary gears 221, 222. The planetary gears 221, 222 of the group 220 of second planetary gears are held on the bearing plate 121 in such a way that their center points are distributed regularly over the circumference of a circular ring K, ie are distributed uniformly. This imaginary circle K is arranged such that its center lies on the axis of rotation of the first gear 210 and that its surface, ie the area enclosed by the circle, is perpendicular to the axis of rotation of the first gear 210.

The essential point here is that the gears 221, 222 of the group 220 of second gears are held on the already existing housing 120 of the electric motor unit 100, in particular on its end plate 121, and not on a separate housing or other component of the transmission unit 200.

The planetary gear 200 further includes another rotatable gear 230, which represents the ring gear of the Planetenge ^¬ drive 200. The ring gear 230 is coupled via its toothing (not shown) with the second gears 221, 222 of the group 220 such that the ring gear 230 rotates upon rotation of the second gears 221, 222 and the planetary gears 221, 222, respectively. To this end, the ring gear is mounted 230 using ei ^¬ ner bearing apparatus 130 rotatably mounted on the motor unit 100th The ring gear 230 in this case has a tooth section 231, in which the mentioned toothing is located, and a bearing section 232, with which the ring gear 230 is mounted on the bearing device 130.

The bearing device 130 comprises a first bearing ring 131, which is radially outwardly on the casing 123 of the housing 120 of the electric motor unit 100 is arranged and about which the ring gear 230 can rotate. The first bearing ring 131 extends along the circumference of the housing 120 or of the jacket 123 and is preferably arranged in the axial direction in the region of the first bearing plate 121.

The ring gear 230 is in the planetary gear 200 with fixed ^¬ the planetary gears 221, 222 for transmitting the provided rotational motion directly or possibly indirectly coupled with the component to be driven bender. The attached to the housing 120 of the electric ^¬ motor unit 100 Storage device 130 is above ^¬ preferably adapted or dimensioned so that they can carry not only the ring gear 230, but also the driven Components ^¬ te, so that the driven component as a consequence of the Housing 120 of the electric motor unit 100 is rotatable. Thus, one saves an otherwise often necessary flange for connecting the component with the gear unit 200. The bearing device 130 may additionally comprise a second bearing ring 132 which in the axial direction to the first bearing ring 131 spaced on the housing 120 of the electric motor unit 100 and the housing 120 and whose sheath 123 is comprehensively placed along its circumference. The second bearing ring 132 is disposed coaxially with the first bearing ring 131 and is located in the axial direction between the first bearing ring 131 and the second bearing plate 122. The bearing section 232 of the ring gear 230 extends accordingly in the axial direction so far that they both bearing rings 131, 132 covered.

Especially the bearing device 130 with the two bearing rings 131, 132 and possibly even additional bearing rings is particularly suitable to store not only the ring gear 230, but also the component to be driven. This arrangement allows a rotation of the component to be driven around the

Electric motor unit 100, wherein the housing 120 of the Elektromo ^¬ gate unit 100 takes over the role of supporting this rotation support. The distance between the bearing rings 131, 132 and thus also the axial extent of the bearing section 232 of the ring gear 230 then depends in particular on the Dimen ^¬ sion of the component to be driven in the axial direction. The bearing device 130 can, in particular for mounting the ring gear 230, and, if necessary, for supporting the driven Comp ^¬ component additionally or alternatively comprise a bearing ring 133 to the one or more bearing rings 131, 132, which is arranged on a circular device or a supporting ring 139, which in turn attached to the axes 226, 227 of the festste ^¬ rising second gears 221, 222 and is supported by these. That variant of the bearing device 130 in which the bearing ring 133 is not additionally provided, but alternatively to the two already explained bearing rings 131, 132, is shown in FIG. At least two of the axes 226, 227 of the second gears 221, 222 are connected to each other via the support ring 139, that the center of the support ring 139 is located on the axis of rotation of the ring gear 230 and that the plane defined by the ring 139 perpendicular to the axis of rotation of the ring gear 230th stands. Since in the embodiment of the planetary gear 200 shown in Figures 1 and 2, the second gears 221, 222 and epicyclic gears 221, 222 are stationary, and the support ring 139 and with it the bearing ring 139 arranged on the bearing ring 133 is fixed and serves to support the Hohlra ^¬ des 230th

3 shows a perspective sectional view of a second embodiment of the drive system 10 with electric motor unit 100 and gear unit 200. The Elektromotorein ^{¬ unit} 100 substantially corresponds to that of the first embodiment.

The transmission unit 200 is also in the illustrated in FIG 3 th second embodiment as a planetary gear with a

Sun gear 210, a group 220 of planetary gears 221, 222 and a ring gear 230 formed, wherein the planetary gears 221, 222 in the radial direction between the sun gear 210 and ring gear 230th are arranged and wherein toothings of the planet gears 221, 222 engage both in the toothing of the shaft 110 driven by the sun gear 210 and in the toothing of the ring gear 230.

In the illustrated in FIG 3 second embodiment of the drive system 10, the planetary gear 200 is formed with rotating epicyclic wheels 221, 222 and fixed, non-rotatable ring gear 230.

The planetary gear 200 has a sun gear to a first toothed wheel ^¬ 210, which is rotatably and directly connected to the shaft 110 of the electric motor unit 100, so that the first gear 210 rotates with rotation of the shaft 110.

In addition, the planetary gear 200 as a ring gear to a second gear 230, which is fixed and non-rotatably on the housing 120 of the electric motor unit 100 fastened ^¬ taken. Accordingly, neither the position nor the position of the ring gear 230 is changeable. For example. For example, ring gear 230 may be secured to housing shell 123. But it is also an attachment to the housing cover or end plate 121 conceivable.

Furthermore, the planetary gear 200 has a group 220 with a plurality of other gears 221, 222. Also for the second embodiment is actually assumed that the group 220 comprises not only the two further toothed wheels illustrated 221, 222, but at least one additional-wide ^¬ res gear which is not shown, since the corresponding part of the drive system 10 due to the

Sectional view is not included in the figure. The other gears 221, 222 represent the epicyclic gears of the planetary gear 200 and are rotatable about their respective axis 226, 227. Here, the planetary gears 221, 222 such Toggle arranged that their center points or their axes 226, 227 K are uniformly distributed over the periphery of such a circular ring, whose center lies on an axis of rotation R of the Son ^¬ nenrades 210 and its surface, that is, the from the circular ring enclosed area, perpendicular to the axis of rotation R stands.

The planetary gears 221, 222 are coupled directly to the sun gear 210 in such a way that they rotate about their respective axis 226, 227 during rotation of the sun gear 210, ie change their position. In addition, the planetary gears 221, 222 are also coupled directly to the fixed ring gear 230, so that upon rotation of the sun gear 210, the other gears 221, 222 rotate not only about their respective axis 226, 227, ie change their position, but also along Move a circumference of the annulus K and thus have to change their position. For this purpose, the planetary gears 221, 222 are mounted on the housing 120 of the electric motor unit 100 and coupled to the sun gear 210, that rotate about their respective axes 226, 227 during rotation of the sun gear 210 and at the same time their centers during rotation of the sun gear 210 along the circumference of the annulus may move K, so that the entirety of the external gears 221, 222 a Rotationsbewe ^¬ supply performs about the rotational axis of the sun gear 210th The ^¬ se rotational movement of the entirety of the planetary gears 221, 222 may finally be transferred to the component to drive them.

In order to make this possible, for example, the ends of the axles 226, 227 of the planetary gears 221, 222 facing the electric motor unit 100 can be guided by means of a corresponding guide device. The guiding device comprises a on the housing 120 of the motor unit 100, in particular at the La ^¬ gerschild 121, mounted annular ridge 126 having a bearing ring 127. Furthermore, the guide device comprises a retaining ring 229 which is rotatably mounted on the bearing ring 127 and on which those ends of the Axles 226, 227 of the planetary gears 221, 222 are fixed, which are the electric ^¬ motor unit 100 faces. In this case, the web 126, the bearing ring 127 and the retaining ring 229 with respect to the rotation R axis of the sun gear 210 concentrically arranged. Thus, the centers of the epicyclic gears 221, 222 can move along the circumference of the annulus K as the sun gear 210 rotates.

In order to transmit the rotational movement of the entirety of the planetary gears 221, 222 about the axis of rotation R to the component to be driven, a transmission device 240 is connected to the planetary gears 221, 222 or, for example, to their axes 226, 227. In the simplest case, the retaining ring 229, which has already been introduced while rotating the sun gear 210, itself represents the transmission device 240, the retaining ring 229 in this case having corresponding devices for coupling the component to be driven, for example, possibilities for introducing screws.

4 shows a perspective sectional view of a third embodiment of the drive system 10 with Elektromo ^¬ gate unit 100 and gear unit 200. The gear unit 200 is formed in the third embodiment as a spur gear. The electric motor unit 100 corresponds We ^¬ sentlichen that of the first and second embodiments. The spur gear 200 has a first gear 210, which rotatably and directly connected to the shaft 110 of the Elektromo ^¬ gate unit 100, so that the first gear 210 rotates with rotating shaft 110. Furthermore, the spur gear 200 has a second gear 221 which on the housing 120 of the electric motor unit 100, in particular on

Housing cover or bearing plate 121 of the housing 120 to its fixed axis 226 rotatable, that is held in a position variable, but fixed position. For example. For example, the axle 226 itself may be attached to the end plate 121. The first 210 and the second gear 221 are arranged to each other ^¬ such that the second gear 221 is coupled directly to the first gear ^¬ wheel 210, so that the second gear 221 rotates at Ro ^¬ tion of the shaft 110 and the first gear 210 . ie its position changes, but not its position. The second gear 221 can now be connected in a known manner directly or indirectly with the component to be driven. The first gear 210 as well as the other components of the gear unit 200 are in all embodiments preferably outside of the housing 120 of the electric motor unit 100. However, the gears can also be accommodated in an additional housing since they are, for example, lubricated with a splash lubrication and must be cooled and protected from dirt from the environment.

Claims

claims

1. drive system (10) for driving a component, wherein the drive system (10), an electric motor unit (100) for providing a rotational movement at a first speed and a transmission unit (200) for transmitting be ^¬ riding detected rotational movement of the component at a second speed includes,

wherein the electric motor unit (100) comprises:

- A housing (120) with at least one bearing plate (121), which at a first axial end of the housing (120) of the electric motor unit (100) is arranged and on which a shaft (110) of the electric motor unit (100) is mounted, which executes and provides provided rotational movement

wherein the gear unit (200) comprises:

a first gear (210), which is rotationally fixed and connected directly to the shaft (110) of the electric motor unit (100),

- At least a second gear (221, 222, 230) which is coupled to the first gear (210) such that the second

Gear wheel (221, 222, 230) co-rotates upon rotation of the first gear, wherein the second gear (221, 222, 230) for transmitting the provided rotational movement with the component to be driven is coupled,

and where

- Each of the second gears (221, 222, 230) on the housing of the electric motor unit (100) is held such that the position of the respective second gear (221, 222, 230) does not change.

2. Drive system (10) according to claim 1, characterized in that the gear unit (200) is a planetary gear with a sun gear (210), at least one planet gear (221, 222) and a ring gear (230), wherein

- the first gear (210) of the transmission unit (200) is the Son ^¬ nenrad of the planetary gear (200)

- Several second gears (221, 222) are present, which represent the epicyclic gears of the planetary gear (200) and which in each case on the housing (120) of the Elektromotorein ^{¬ unit} (100) about their respective axes (226, 227) are rotatably held, that their centers are distributed over the circumference of a circular ring K, whose center on an axis of rotation R of the first gear ( 210) and whose surface of the first Zahnra ^¬ of (210) is perpendicular to the axis of rotation R,

and where

- The gear unit (200) has a further, rotatable gear (230), which is the ring gear (230) of the Planetengetrie ^¬ bes (200) and which is coupled to the second gears (221, 222) such that the further gear ( 230) upon rotation of the second gears (221, 222)

co-rotated, wherein the further gear (230) for transmitting the provided rotational movement with the component to be driven can be coupled.

3. Drive system (10) according to claim 2, characterized in that the further gear (230) via a on the housing (120) of the electric motor unit (100) mounted Lagerervorrich ^¬ device (130) is rotatably mounted.

4. Drive system (10) according to claim 3, characterized in that the bearing device (130) has a bearing ring (131) which surrounds the housing (120) along its circumference ^¬ send arranged.

5. Drive system (10) according to claim 3, characterized in that the bearing device (130) has two bearing rings (131, 132) which in the axial direction from each other

spaced apart on the housing (120) of the electric motor unit (100) and the housing (120) are circumferentially pla ^{¬ ed} along its circumference.

6. Drive system (10) according to one of claims 3 to 5, since ^¬ characterized in that at least two of the axes (226, 227) of the second gears (221, 222) via an annular support ring (139) are interconnected, whose center on the axis of rotation R of the further gear (230) and its surface is perpendicular to the axis of rotation R of wei ^¬ teren gear (230), wherein the further gear (230) is rotatably mounted on the support ring (139).

7. Drive system (10) according to one of claims 3 to 6, characterized in that the housing (120) of the electric ^¬ motor unit (100) mounted bearing device (130) is designed such that it not only the ring gear (230), but can also carry the component to be driven.

8. Drive system (10) according to claim 1, characterized in that the gear unit (200) is a planetary gear with a sun gear (210), at least one planet gear (221, 222) and a ring gear (230), wherein

- The first gear (210) of the transmission unit (200) is the sun ^¬ nenrad (210) of the planetary gear (200),

- The second gear (230), the ring gear (230) of the Planetenge ^¬ drive (200), wherein the ring gear (230) is fixedly held on the housing (120) of the electric motor unit (100),

- The transmission unit (200) a plurality of further gears (221, 222) which are arranged between the sun gear (210) and ring gear (230) and the planetary gears (221, 222) of Pla ^¬ netengetriebes (200) represent

in which

- The other gears (221, 222) are each arranged on the housing (120) of the electric motor unit (100) that ih ^¬ re centers are distributed over the circumference of a circular ring K, whose center on an axis of rotation R of the first gear (210) and whose surface is perpendicular to the axis of rotation R of the first gear (210),

the further toothed wheels (221, 222) are furthermore mounted on the housing (120) of the electric motor unit (100) and coupled to the first toothed wheel (210) so that they rotate about their respective axes when the first toothed wheel (210) is rotated. 226, 227) and that at the same time their centers move on rotation of the first gear (210) along the circumference of the circular ring K, so that the entirety of the other Gears (221, 222) performs a rotational movement, which is transferable to the component.

9. Drive system (10) according to claim 8, characterized marked, that on the housing of the electric motor unit (100) a Füh ^¬ tion device (126, 127, 229) is provided, with those ends of the axes (226, 227) of the other Gears (221, 222), which are the electric motor unit (100) facing, are feasible such that the centers of the other gears (221, 222) on rotation of the first gear (210) along the circumference of the annulus K move.

10. Drive system (10) according to claim 9, characterized in that the guide device (126, 127, 229) on the housing (120) of the electric motor unit (100) attached ring ^¬ shaped web (126) having a bearing ring (127) and a Retaining ring (229), wherein the retaining ring (229) about the rotation axis R of the first gear (210) rotatably mounted on the bearing ^¬ ring (127) and wherein the axes (226, 227) of the other gears (221, 222) on Retaining ring (229) are attached.

11. Drive system (10) according to any one of claims 8 to 10, characterized in that on the axes (226, 227) of the further gear wheels (221, 222) a transmission device (240) is attached, which can be coupled to the component to be driven, to transfer the rotational movement to the component.

The drive system (10) of claim 11, wherein the retaining ring (229) is the transfer device (240).

13. Drive system (10) according to claim 1, characterized in that the gear unit (200) is a spur gear (200), wherein the spur gear (200) has a first drive-side spur gear (210) and a second,

output-side spur gear (221), wherein - the first gear (210) represents the transmission unit (200), the ers ^¬ te, drive-side spur gear (210)

- The second gear (221), the second, output-side end ^¬ wheel (221), wherein the second gear (221) on the housing (120) of the electric motor unit (100) is held rotatably about its axis (226).