Drive arrangement, especially for a vehicle

Abstract

Drive arrangement (1) with an electric motor (2) and with a gearbox section (3) and with a conveying device, wherein the electric motor (2) is operatively connected to the gearbox section (3) via a rotor shaft (6) and an output shaft (9) is coupled to the gearbox section (3), wherein the rotor shaft (6) is designed as a hollow shaft, and wherein the rotor shaft (6) defines a main axis of rotation (H) of the drive arrangement (1), wherein the output shaft (9) is arranged in the rotor shaft (6) such that an annular gap (24) is formed between the rotor shaft (6) and the output shaft (9), and wherein lubricant is arranged and / or can be arranged in the annular gap (24), wherein the conveying device is designed as an insert component (26) and is connected to the rotor shaft (6) in a rotationally fixed manner by means of a system section (29) abutting the rotor shaft (6), and wherein the conveying device has conveying elements (32) arranged in the annular gap (24) or in an extension of the annular gap (24) for conveying the lubricant along the annular gap (24), wherein the conveying elements (32) are designed as beads (32) for conveying the lubricant along the annular gap (24), and wherein the beads (32) designed as depressions have a conveying opening (33) at one end and the beads (32) together with the conveying openings (33) form vanes for conveying the lubricant.

Description

[0001] The invention relates to a drive arrangement, in particular for a vehicle, comprising a rotor shaft, wherein the rotor shaft is designed as a hollow shaft, the rotor shaft defining a main axis of rotation of the drive arrangement, a driven shaft, wherein the driven shaft is arranged in the rotor shaft, such that an annular gap is formed between the rotor shaft and the driven shaft, wherein lubricant is arranged and / or can be arranged in the annular gap, and a conveying device, wherein the conveying device has conveying elements for conveying the lubricant along the annular gap.

[0002] In vehicles with electric drives, drive torque from an electric motor is often transmitted via a gearbox to output shafts, which are operatively connected to the driven wheels of one axle of the vehicle. For a compact design of such drive concepts, some embodiments feature output shafts arranged coaxially with the electric motor and passing through it.

[0003] German patent application DE 10 2012 202 454 A1, which likely represents the closest prior art, discloses, for example, such a drive concept, in which an output shaft is coaxially routed through a hollow-shafted drive shaft of the electric motor. The special feature of the drive concept in this document, however, is an oil guide system, in which oil is guided in the gap between the output shaft and the drive shaft. To assist in guiding the oil, helically shaped ribs are arranged on the inner wall of the drive shaft, which transport the oil axially within the annular gap.

[0004] AT 311 189 B discloses a lubrication device for the differential of motor vehicles with a rotating, closed differential housing that has oil passage holes and is immersed in an oil sump. This shaft or housing bearing is provided with a coaxial collar projecting towards the differential housing, which encloses a feed screw rotating with the shaft or differential housing. Downstream of the feed screw, oil passage holes lead into the interior of the differential housing. The latter has further oil passage holes in the area of ​​the opposite bearing. The feed screw is made of plastic in a manner known per se and can be attached to the nut used to clamp the bearing.

[0005] DE 11 2013 005 740 T5 discloses a transmission device for transmitting a rotary force with a predetermined reduction ratio between a pair of partner elements, wherein the rotary device comprises an outer cylinder that can be fixed to one of the partner elements and, together with the pair of partner elements, forms a space that can be filled with a lubricant. The device also comprises a crankshaft, a support that can be fixed to the other partner element, rotatably mounted in the outer cylinder and rotating relative to the outer cylinder in conjunction with the rotation of the crankshaft, and a bearing that is attached to the support and rotatably holds the crankshaft. Furthermore, the device comprises a stirring device that is attached to the crankshaft and generates a flow of the lubricant in one direction along the crankshaft when the crankshaft rotates.

[0006] EP 1 582 777 A2 discloses a power transmission device comprising a housing, a lubricant reservoir in the housing, a shaft rotatably mounted in the housing and extending into the lubricant reservoir, a lubricant in the lubricant reservoir, a lubricant conveying structure formed on the shaft for rotation with the shaft, wherein the lubricant conveying structure has at least one helical part extending longitudinally along at least one part of the shaft and peripherally around it, a differential gear connected to the shaft, and a passage defined by the housing that allows the lubricant to flow back from the differential gear to the lubricant reservoir.The passage supplies lubricant to the lubricant reservoir near an inlet portion of the at least one helical part located within the lubricant reservoir. This at least one helical part is at least partially located within the lubricant reservoir and has several peripherally spaced teeth extending radially outwards along the shaft. As the at least one helical part rotates, a portion of the lubricant is carried axially along the shaft and away from the lubricant reservoir.

[0007] The object of the present invention is to propose a drive arrangement for a vehicle which provides a simplified and / or improved lubricant supply.

[0008] This problem is solved by a drive arrangement having the features of claim 1. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description, and the accompanying figures.

[0009] The invention relates to a drive arrangement which is particularly suitable and / or designed for a vehicle. The drive arrangement preferably forms a section of the vehicle's drivetrain. The vehicle is in particular a passenger car, truck, bus, etc. In this configuration, the drive arrangement serves to transmit or at least provide drive torque to the vehicle's wheels for propulsion. Preferably, the drive torque is dimensioned such that the vehicle can be accelerated to a speed greater than 50 km / h by the drive torque.

[0010] The drive arrangement comprises a rotor shaft of an electric motor, wherein the rotor shaft is designed as a hollow shaft. In particular, the rotor shaft has a shaft receptacle that is open at least on one side. Preferably, the rotor shaft is non-rotatably coupled to, and in particular connected to, a rotor of the electric motor. It is provided that the rotor shaft defines a main axis of rotation of the drive arrangement.

[0011] The drive arrangement comprises at least one output shaft, wherein the output shaft is arranged in the rotor shaft, particularly in the shaft housing. In particular, the output shaft and rotor shaft are arranged coaxially and / or concentrically to each other. Preferably, the drive arrangement comprises two output shafts, which are operatively connected to wheels of a driven axle of the vehicle, but only one of the drive shafts passes through the rotor shaft.

[0012] The function of the rotor shaft is to transmit drive torque from the electric motor towards the output shaft, possibly via a gearbox. The function of the output shaft is to transmit drive torque, which was introduced by the rotor shaft and which may have been converted (in particular, multiplied or reduced) via the gearbox, towards a driven wheel or axle.

[0013] An annular gap – also called a shaft gap – is formed between the rotor shaft and the output shaft. This annular gap can have a constant or varying cross-sectional area in its axial extent relative to the main axis of rotation. The output shaft may be supported on the rotor shaft by one or more bearing arrangements. In particular, the rotor shaft and the output shaft arranged therein rotate at different angular velocities and / or in different directions during operation.

[0014] A lubricant, in particular a gear oil, is arranged and / or can be arranged in the annular gap. The direction from one wheel-side or free end of the output shaft to the other, in particular the gear section-side, end of the output shaft is hereinafter referred to as the delivery direction. In particular, during operation of the drive arrangement, the lubricant is guided through the annular gap in the axial direction towards the main axis of rotation in the delivery direction. The annular gap is thus designed, in particular, as a lubricant guide. The lubricant is preferably not guided over the entire axial length of the output shaft, but only in sections.

[0015] The drive assembly includes a conveying device, the conveying device comprising conveying elements designed to convey the lubricant along the annular gap. In particular, at least one main section of the annular gap forms a pressure side of the conveying device, specifically adjacent to the conveying direction. The conveying elements can be separate conveying elements or conveying elements formed by the design of the conveying device. Preferably, at least one lubricant outlet is provided in the drive assembly, wherein the at least one lubricant outlet is arranged downstream of the conveying device.

[0016] Within the scope of the invention, it is proposed that the conveying device be designed as an insert component. In particular, the conveying device is designed as a separate insert component. The insert component itself can be implemented as a single or multiple component. The insert component is rotationally fixed to the rotor shaft. The connection can be of any type, i.e., in particular, material-fit, friction-fit, force-fit, and / or form-fit.

[0017] By using the insert component as the conveying device, the insert component, and thus the conveying device, can be tailored to the specific application. This overcomes design constraints, such as those imposed by the cited prior art, thereby simplifying the design and construction of the drive assembly. While in the cited prior art, the radial height of the conveying ribs is significantly limited, for example, by the available base material, in order to keep the components economically viable, the conveying device can be designed almost arbitrarily when used as an insert component. In particular, the increased design freedom allows for better adaptation of the conveying capacity of the insert component to the application. A further advantage is that the insert component can be manufactured cost-effectively as a separate component.Thus, the invention leads to a simplified, more cost-effective and / or functionally improved design of the lubricant supply in the drive arrangement.

[0018] In particular, the pumping device can be an axial pump that delivers the lubricant axially and / or parallel to the main axis of rotation. Specifically, the pumping device is designed as a flow pump. The insert component forms a pump impeller that rotates together with the rotor shaft. The insert component is, for example, propeller-like or designed as a blade ring.

[0019] According to the invention, the conveying elements are arranged in the annular gap or in an axial extension of the annular gap (in particular, a hypothetical extension). For example, the conveying elements and / or the conveying device can be arranged at an inlet section, in particular an inlet section of the annular gap located outside the gearbox. However, for design reasons, it is also possible for the conveying elements, in particular the conveying device, to be offset axially into the annular gap. It is preferred that at least one main section of the annular gap forms a pressure side of the conveying elements and / or the conveying device. The suction side of the conveying elements and / or the conveying device, on the other hand, is optionally formed by an inlet section of the annular gap or by an annular space around the output shaft.

[0020] In a preferred embodiment of the invention, the insert component comprises an annular segment, the output shaft preferably passing coaxially through this segment. The conveying elements are preferably arranged on the annular segment. In particular, the conveying elements are formed from the same base material as the annular segment. The annular segment preferably extends in a radial plane to the main axis of rotation. In a possible embodiment of the invention, the conveying elements are formed as grooves in the insert component that are open on one side, particularly on the inlet side, in the direction of rotation around the main axis of rotation.

[0021] In a preferred embodiment of the invention, the insert component has a contact section for bearing against the rotor shaft. This contact section is designed, in particular, as a straight hollow cylinder section, the outer surface of which rests against the rotor shaft. The rotor shaft preferably provides an annular seat, which is designed, for example, as a step and / or as a change in the diameter of the free inner diameter of the rotor shaft. It can be provided that the insert component, with its contact section, is arranged in an interference fit within the rotor shaft and is thus secured in the rotor shaft by friction and / or force-fit. In this embodiment, both the manufacturing of the insert component and its assembly in the rotor shaft can be implemented cost-effectively.

[0022] In particular, the insert component is made of metal. Preferably, the insert component is designed as a sheet metal component.

[0023] In a preferred embodiment of the invention, the insert component is designed as a formed part. In a first manufacturing step, a ring body is produced from a semi-finished product, particularly a sheet metal part. This ring body comprises a cover surface section and a contact section. In the same or a subsequent step, the conveying elements, particularly the beads, can be formed. Subsequently, a central through-opening, the sectional removal of the conveying elements (especially the opening of the beads on the inlet side), and optionally, trimming by a separating manufacturing process can be implemented.

[0024] In a preferred embodiment of the invention, the drive arrangement comprises a further conveying device, wherein the further conveying device is arranged downstream of the insert component. In particular, the further conveying device is arranged in the annular gap, specifically in the main section of the annular gap.

[0025] In a first embodiment, the additional conveying device is designed as a continuous, particularly conical, widening of the free inner diameter or opening cross-section of the rotor shaft in the conveying direction. This continuous widening ensures that the lubricant is conveyed axially in the conveying direction due to centrifugal force. In a second embodiment, conveying ribs or grooves can be formed on the rotor shaft and / or the output shaft, which are at least partially helical. This additional conveying device supports the conveying effect in the annular gap of the insert component.

[0026] In a preferred embodiment of the invention, the drive assembly comprises a housing. The housing is stationary and / or can be arranged in the vehicle and can be designed as a single or multi-part unit. The housing can also consist of several separate housing sections. An inlet for the lubricant is provided in the housing. Furthermore, the drive assembly has a feed device located inside the housing. The feed device is fluidically connected to the inlet and transports the lubricant from the inlet to the component. The feed device can, for example, be designed as a pipe section. The lubricant can thus be introduced into the housing via the inlet, transported to the component via the feed device, and then conveyed by the component in the axial direction towards the main axis of rotation along the annular gap by means of the pumping action.

[0027] In a preferred embodiment of the invention, the drive arrangement is designed as an electric drive for the vehicle. In this embodiment, the drive arrangement comprises the electric motor and the transmission section, wherein the electric motor is operatively connected to the transmission section. In particular, the drive torque of the electric motor is transmitted to the transmission section via the rotor shaft. The drive torque is converted in the transmission section, in particular by reduction or a gear reduction, and is at least partially output via the output shaft. The drive arrangement is particularly designed as an electric axle or as a wheel hub motor for an electric vehicle or for a hybrid vehicle.

[0028] In a preferred embodiment of the invention, the transmission section comprises at least one transmission part rotating about the main axis of rotation. For example, the transmission section comprises at least one planetary gear section, wherein the transmission part rotating about the main axis of rotation is designed as a planet carrier or as a planetary stage. The housing has an outlet which is fluidically connected to the inlet. An initial opening of the outlet is formed in the housing at the same axial height as the rotating transmission part and is preferably oriented tangentially to the main axis of rotation in terms of depth, and in particular in terms of flow direction. This configuration is arranged such that the lubricant accelerated by the rotating transmission part is at least partially directed into the outlet. This allows the inlet to be supplied with lubricant without additional pumping devices.

[0029] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention and the accompanying figures. These show: Fig. 1 a schematic longitudinal sectional representation of a drive arrangement in semi-schematized form as a first embodiment of the invention; Fig. 2 a schematic three-dimensional representation of an insert component in the drive arrangement in the Fig. 1; Fig. 3. A detailed enlargement of the drive arrangement in the same representation as in the Fig. 1; Fig. 4 a first alternative embodiment of the drive arrangement in the Fig. 1; Fig. 5 a schematic representation of a detail for a further alternative embodiment of the drive arrangement in the Fig. 1.

[0030] The Fig. Figure 1 shows a longitudinal section with schematic additions of a drive arrangement 1 as an embodiment of the invention. The drive arrangement 1 is designed as an electric axle for a vehicle. The electric axle serves to generate drive torque for the vehicle. In particular, the vehicle is designed as an electric vehicle or as a hybrid vehicle.

[0031] The drive arrangement 1 comprises an electric motor 2 for generating drive torque and a gear section 3 for conversion, in particular transmission, reduction, and / or conversion, of the drive torque of the electric motor 2. The electric motor 2 has a stator 4 and a rotor 5, wherein the rotor 5 is arranged internally to the stator 4, so that the electric motor 2 is designed as an internal rotor motor. The rotor 5 is non-rotatably connected to a rotor shaft 6. The rotor shaft 6 defines a main axis of rotation H with its axis of rotation and / or central axis.

[0032] The rotor shaft 6 is operatively connected to the transmission section 3 and forms an input to the transmission section 3. At least one planetary gear stage or another transmission 7 is arranged in the transmission section 3, wherein at least one transmission part 8, such as a planet carrier, is rotationally fixed to the rotor shaft 6. During operation of the electric motor 2, the transmission part 8 is thus rotated about the main axis of rotation H. The transmission 7 has two outputs, which are rotationally fixed to two output shafts 9, 10. The output shafts 9 transmit the converted and divided drive torque of the electric motor 2 to driven wheels of the vehicle. Fig. In the illustration shown in Figure 1, the output shaft 10 is only shown in a highly schematic form.

[0033] The rotor shaft 6 is designed as a hollow shaft, with the output shaft 9 arranged within the hollow rotor shaft 6. In particular, the output shaft 9 is arranged concentrically and / or coaxially with the rotor shaft 6. At the free end of the output shaft 9, facing away from the transmission section 3, a mechanical interface 11, designed as a flange, is integrally mounted onto the output shaft 9 in this example.

[0034] The drive assembly comprises a housing 12, in which the rotor shaft 6 is supported by a first bearing assembly 13, designed as a rolling bearing assembly, in particular a deep groove ball bearing, and the output shaft 9 is supported by a second bearing assembly 14, also designed as a rolling bearing assembly, in particular a deep groove ball bearing. In the illustrated embodiment, the first and second bearing assemblies 13 and 14 each form a floating bearing. A shaft seal 15, designed as a shaft seal ring, is arranged axially on the inside of the housing next to the first bearing assembly 13. The shaft seal 15 seals the rotor shaft 6 against the housing 12. A further shaft seal 18, designed as a shaft seal ring, is arranged axially on the outside of the second bearing assembly 14, sealing the output shaft 9 against the housing 12.

[0035] This creates an annular space 19 between the first shaft seal 15 and the second shaft seal 18, the annular space 19 being sealed in one axial direction by the first shaft seal 15 and in the other axial direction by the second shaft seal 18.

[0036] The gearbox 7, comprising the gearbox part 8, is housed in a further section 16 of the casing 12, in which an oil sump 17 is located. The casing 12 has an outlet 20 in the region of the further section 16 and an inlet 21 in the region of the annular space 19. Outlet 20 and inlet 21 are fluidically connected to each other via an oil line 22.

[0037] During operation, the gear unit 8 moves oil from the oil sump 17 in a circular motion around the main axis of rotation H, creating a circulating oil flow – also known as an oil roller. A partial flow is diverted from this circulating oil flow via the outlet 20, which is designed as a housing opening or bore oriented tangentially to the main axis of rotation H. This partial flow is then routed through the oil line 22 to the inlet 21. Thus, by utilizing the movement of the gear unit 7 or gear unit 8, the oil is pumped from the oil sump 17 into the oil line 22 and delivered to the inlet 21.

[0038] Inside the housing, a feed device 23 is arranged behind the inlet 21, which is fluidically coupled to the inlet 21. The feed device 23 is, for example, designed as a feed pipe. The feed device 23 directs the oil into a radially inner region of the annular space 19 and releases it axially in the direction of the gear section 3.

[0039] An annular gap 24 is arranged between the rotor shaft 6 and the output shaft 9 located therein, extending axially to the main axis of rotation H. The annular gap 24 has an inlet section 25 which opens into the annular space 19. The feed device 23 is oriented in its end section such that the oil is introduced axially into the inlet section 25 of the annular gap 24.

[0040] A conveying device, implemented as an insert component 26, is arranged in the inlet section 25 of the annular gap 24. A main section 27 of the annular gap 24 adjoins the insert component 26. The insert component 26 is designed as a ring component and is rotationally fixed to the rotor shaft 6. The insert component 26 functions as a propeller or impeller and is initially designed such that the oil present is conveyed through the insert component 26 and, by its rotation along the rotor shaft 6, into a main section 27. Thus, the inlet section 25 forms a suction side and the main section 27 a pressure side of the insert component 26, which is designed as an oil pump disc.

[0041] The described design provides an oil supply which, starting from the outlet 20 – or in alternative embodiments from another oil pump – directs the oil via an oil line 22, the inlet 21, and the feed device 23 to the insert component 26, where it is conveyed axially in the annular gap 24, as indicated by the arrows. In addition to conveying the oil axially to the main axis of rotation H, it is also possible to accelerate or convey the oil in a circular motion around the main axis of rotation H. Further along the annular gap 26, transverse bores can, for example, be provided in the rotor shaft 6 to distribute the oil, e.g., in the gearbox section 3.

[0042] The Fig. Figure 2 shows a three-dimensional view of the insert component 26, which is designed as a ring component. The insert component has a top section 28, which lies in a radial plane to the main axis H. Furthermore, the insert component 26 has a contact section 29, which extends from the top section 28 in a tube-like or tubular-cylinder-like manner. The contact section 29 forms a cylindrical surface 30, which is arranged radially outside and with which the insert component 26 is connected to an annular seat 31 (see Figure 2). Fig. 3) in a radial direction. Several beads 32, in this example 6, are formed in the ceiling section 28, each having an inlet or conveying opening 33 at one end. The beads 32 are designed as recesses and, together with the conveying openings 33, form vanes for conveying the oil. The beads 32 are arranged on the same axial side of the ceiling section 28 as the system section 29. A through-opening 34 is recessed in the center, through which the output shaft 9 passes.

[0043] From a manufacturing perspective, the insert component 26 is produced as a formed component. Starting with a sheet metal part, particularly a thin sheet, a basic shape of the insert component 26, including the beads 32, is formed using forming techniques, e.g., by single- or multi-stage deep drawing. In a subsequent manufacturing step, the central through-opening 34 is formed into the cover section 28, and the inlet-side conveying openings 33 are formed into the beads 32.

[0044] The Fig. Figure 3 shows a detail from the drive arrangement 1 in the Fig. Figure 1, showing the installation situation of the insert component 26. The ring seat 31 is designed as an annular step with an annular shoulder, wherein the insert component 26 is inserted in an interference fit so that it is frictionally and / or force-fitted to the rotor shaft 6. The beads 32 project outwards from the cover section 28 towards the annular space 19, so that the oil conveyed by the feed device 23 is received through the feed opening 33 and transported via the beads 32 towards the main section 27 of the annular gap 24.

[0045] Radially on the inner side, a collar 35, which forms the boundary of the through-opening 34, is sufficiently spaced from the output shaft 9 to prevent contact. At the same time, however, the radial distance to the output shaft 9 is chosen to be so small that the backflow of oil from the main section 27 of the annular gap 24 is minimal.

[0046] The rotation of the rotor shaft 6, and consequently of the insert component 26, conveys the oil supplied via the feed device 23 in an axial direction towards the main axis of rotation H and towards the gearbox section 3. A further positive effect results from the fact that the first and second bearing assemblies 13, 14 are also arranged in the annular space 19 in such a way that they are lubricated simultaneously.

[0047] To further support the delivery of oil in the axial direction to the main axis of rotation H, for example, according to the Fig. 4. It is provided that the rotor shaft 6 has an inner cone 36, wherein the free outer diameter of the inner cone 36, and thus the free opening cross-section of the rotor shaft 6, is continuously increased from the insert component 26 towards the gear section 3, for example. At the same time, the annular width of the annular gap 24, i.e., the radial distance between the output shaft 9 and the rotor shaft 6, is increased. Due to centrifugal force, the oil flows against the inner wall of the rotor shaft 6; the conicity of the inner surface of the rotor shaft 6 ensures that the oil is carried further in the axial direction.

[0048] Alternatively or additionally, the inner surface of the rotor shaft 6 can also have conveying ribs 37, as shown in the Fig. Figure 5 shows the conveyor ribs 37 arranged in a helical pattern. Reference symbol list 1 Drive arrangement 2 electric motors 3 Gearbox section 4 Stator 5 Rotor 6 Rotor shaft 7 gearboxes 8 Gearbox part 9 Output shaft 10 Output shaft 11 mechanical interface 12 cases 13 First storage facility 14 Second storage facility 15 shaft seal 16 Further section 17 Oil sump 18 More shaft seals 19 Ring space 20 outlet 21 Admission 22 Oil line 23 Feeding device 24 annular gap 25 Entrance section 26 Insert component 27 Main Section 28 Ceiling section 29th section of the plant 30 cylindrical surface area 31 Ring seat 32 groove 33 Funding opening 34 Passage opening 35 collars 36 Inner cone 37 conveyor ribs H Main axis of rotation

Claims

[1] Drive arrangement (1) with an electric motor (2) and with a gearbox section (3) and with a conveying device, wherein the electric motor (2) is operatively connected to the gearbox section (3) via a rotor shaft (6) and an output shaft (9) is coupled to the gearbox section (3), wherein the rotor shaft (6) is designed as a hollow shaft, and wherein the rotor shaft (6) defines a main axis of rotation (H) of the drive arrangement (1), wherein the output shaft (9) is arranged in the rotor shaft (6) such that an annular gap (24) is formed between the rotor shaft (6) and the output shaft (9), and wherein lubricant is arranged and / or can be arranged in the annular gap (24), wherein the conveying device is designed as an insert component (26) and is connected to the rotor shaft (6) in a rotationally fixed manner by means of a system section (29) abutting the rotor shaft (6), and wherein the conveying device has conveying elements (32) arranged in the annular gap (24) or in an extension of the annular gap (24) for conveying the lubricant along the annular gap (24), wherein the conveying elements (32) are designed as beads (32) for conveying the lubricant along the annular gap (24), and wherein the beads (32) designed as depressions have a conveying opening (33) at one end and the beads (32) together with the conveying openings (33) form vanes for conveying the lubricant. [2] Drive arrangement (1) according to claim 1, characterized by , that the insert component (26) has a circular ring section, wherein the output shaft (9) passes through the circular ring section and wherein the conveying elements (32) are arranged on the circular ring section. [3] Drive arrangement (1) according to one of the preceding claims, characterized by, that the plant section (29) is designed as a hollow cylinder section with an outer cylindrical surface (30) and wherein the outer cylindrical surface is in contact with the rotor shaft (6). [4] Drive arrangement (1) according to one of the preceding claims, characterized by , that the insert component (26) is designed as a formed part. [5] Drive arrangement (1) according to one of the preceding claims, characterized by a further conveying device, wherein the further conveying device is arranged downstream of the insert component (26), wherein the further conveying device is designed as a continuous extension of the opening cross-section of the rotor shaft (6) or as conveying ribs (37) which are formed on or molded into the rotor shaft (6). [6] Drive arrangement according to one of the preceding claims, characterized bya housing (12) for the gearbox section and a supply device (23), wherein an inlet (21) for the lubricant is formed in the housing (12) and wherein the supply device (23) is connected to the housing (12) and transports the lubricant from the inlet (21) to the insert component (26). [7] Drive arrangement according to claim 9, characterized bythat the transmission section (3) has at least one transmission part (8) rotating about the main axis of rotation (H), wherein the housing (2) has an outlet (20) which is arranged at the same axial height as the transmission part (8) and which is fluidically connected to the inlet (21) so that lubricant is guided from the outlet (20) to the inlet (21), wherein an oil supply is provided which is led from the outlet (20) via an oil line (22), the inlet (21) and via a feed device (23) to the insert component (26) and the lubricant can be conveyed from there in the annular gap (24) by means of the insert component (26) in the axial direction.

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