Electric auxiliary power take-off assembly for a utility vehicle
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-01-28
- Publication Date
- 2026-08-13
Smart Images
Figure EP2026052180_13082026_PF_FP_ABST
Abstract
Description
[0001] ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0002] Electric power take-off system for a commercial vehicle
[0003] The invention relates to an electric power take-off arrangement for a commercial vehicle with the features of the preamble of claim 1.
[0004] It is common practice to operate superstructures on commercial vehicles, such as cranes, tippers, etc., via the combustion engine using PTOs (power take-offs). The energy is usually supplied by a hydraulic pump, which acts as a power transmission and can handle high loads. The electrification of vehicle technology also requires a corresponding solution for the independent operation of these superstructures. For this purpose, the combustion engine or transmission is replaced by an electric motor, which generates the necessary torque to drive the hydraulic pump.
[0005] For example, German patent application DE 10 2021 205 866 A1 discloses a heat transfer arrangement for a power train of a machine, comprising a first electric drive, a second electric drive, a gearbox connected to the first and second electric drives for torque transmission, and a heat transfer system with a cooling circuit, wherein the heat transfer system is configured to dissipate heat generated during operation of the power train by the electric drives by means of a coolant flow from the cooling circuit and to supply at least a portion of the dissipated heat to the gearbox for heating purposes. For example, the second electric drive can provide work power for adjusting a tool of the machine.
[0006] The invention aims to create a secondary drive arrangement of the type mentioned above, which is characterized by a robust design and simple assembly.
[0007] This problem is solved according to the invention by a power take-off arrangement with the features of claim 1. Advantageous embodiments are described in the dependent claims, the drawings and / or the description. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0008] The invention relates to an electric power take-off (PTO) arrangement designed and / or suitable for use in a commercial vehicle. In particular, the PTO arrangement serves to transmit energy to at least one implement that can be coupled and / or is coupled to the commercial vehicle. The commercial vehicle can be an agricultural machine, for example a tractor, a construction machine, for example an excavator, or a special-purpose vehicle.
[0009] The power take-off (PTO) assembly includes a power take-off, also known as a "PTO". The PTO primarily serves to provide auxiliary power to the implement. For this purpose, the implement can be mechanically and / or hydraulically connected to the PTO.
[0010] The power take-off arrangement includes an electric machine designed and / or suitable for providing electric drive torque or power for the power take-off. The electric machine can be directly or via a gearbox coupled to the power take-off. In other words, the power take-off can be formed or driven either by a drive shaft of the electric machine or by an output shaft of a gearbox. Preferably, the electric machine is designed as an internal rotor. The electric machine essentially comprises a stator and a rotor, which is arranged radially within the stator. The electric machine defines an axis of rotation, particularly with the rotor axis.
[0011] The power take-off assembly has a heat transfer system with a cooling circuit and an oil circuit, wherein the heat transfer system is designed and / or suitable for transferring heat generated during the operation of the electric machine between the cooling circuit and the oil circuit. In particular, the cooling circuit serves essentially to cool one or more electrical components of the power take-off assembly, such as the electric machine and / or power electronics for the electric machine. The oil circuit serves essentially to lubricate one or more mechanical components of the power take-off assembly, such as the ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0012] The oil circuit is used for the electric motor and / or the gearbox. Optionally, it can be used to cool one or more components of the electric motor and / or the gearbox.
[0013] The heat transfer system comprises several fluid-carrying components. Fluid-carrying components are understood to be, in particular, components of the heat transfer system that serve to guide and / or control a fluid from the cooling circuit and / or the oil circuit. Preferably, the components are designed as independent units that are mounted or attached separately.
[0014] The power take-off assembly comprises a housing designed and / or suitable for accommodating the electric machine. The housing includes a base and a cover, which are connected to each other axially with respect to the axis of rotation at an axial end face of the housing. In particular, the base and the cover define a housing space, in which the electric machine is arranged. Specifically, the stator is arranged within the base and / or rotationally fixed to the base. For example, the base and the cover are designed as cast components, such as those made of die-cast aluminum.
[0015] The housing cover has a power take-off (PTO) connection interface arranged coaxially to the axis of rotation, which is designed and / or suitable for connecting a drive unit to the PTO. In particular, the drive unit is mechanically connected to the housing cover via the PTO connection interface, and is also technically connected to the PTO. The drive unit can be designed as a mechanical or hydraulic drive unit. For example, the mechanical drive unit can be a power take-off shaft. For example, the hydraulic drive unit can be a hydraulic pump. Preferably, the at least one mounting component is arranged radially offset from the PTO connection interface. Specifically, ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0016] the auxiliary power unit connection interface extends radially to the axis of rotation – the connection plane.
[0017] Within the scope of the invention, it is proposed that at least or exactly one, preferably several, and in particular all, of the mounting components of the heat transfer system are mounted axially, particularly inwards, offset from the power take-off connection interface in an axial direction with respect to the axis of rotation on the housing base body, such that a mounting space for the at least one mounting component is arranged offset from the power take-off connection interface. In other words, the housing base body is designed such that the at least one mounting component is mounted on the housing base body outside the housing cover. Preferably, the at least one mounting component is fixed directly to the housing base body. In particular, the mounting components arranged on the housing base body are arranged outside a mounting space of the drive unit.Preferably, the installation space for the drive unit is arranged axially spaced from the installation space of the mounting components and / or is limited by the connection plane of the auxiliary power output connection interface. Particularly preferably, the mounting components are arranged largely or completely within one axial length of the housing body.
[0018] The invention is based on the understanding that integrating an electric motor for a power take-off (PTO) in commercial vehicles is usually associated with limited installation space. Furthermore, the power requirements can vary depending on the application, which means the size and weight of the electric motor can vary accordingly. The output speeds required for hydraulic pumps are usually around 2000 rpm, which is below the capacity of the electric motor, so higher speeds can only be achieved with the aid of a gearbox. The variety of possible drive devices, such as hydraulic pumps, that can be connected, especially in conjunction with an integrated gearbox, presents the challenge of providing a sufficient support base across the housing division. In the previous design, the mounting components were attached to the housing.
[0019] The housing cover is positioned, which also serves as the interface for connecting the power take-off unit. To prevent the mounting components from protruding into the installation space of the power take-off unit, the housing cover is slightly cup-shaped. This positions the mounting points to the vehicle relatively far from the power take-off connection interface, resulting in a long lever arm. The weight and vibrations or shocks from the power take-off unit can thus lead to considerable bending loads on the housing. Depending on the length of the lever arm, this can result in very high stresses on the housing.
[0020] The advantage of the invention lies in the fact that by arranging the mounting component(s) directly on the housing body and thus outside the housing cover, the weight force acting on the housing cover can be significantly reduced. Furthermore, the housing cover can be made considerably flatter due to the offset arrangement of the mounting component, without the mounting components creating an obstruction during the assembly of the drive unit or protruding into the installation space of the drive unit. The flat design of the housing cover reduces the lever arm and thus the bending loads on the housing. A power take-off arrangement is therefore proposed which is characterized by a significantly more robust construction. In addition, the housing cover can be designed much more simply, and assembly can be considerably simplified.
[0021] In a specific embodiment, the at least one mounting component is optionally arranged on the axial end face of the housing or on another axial end face of the housing opposite the axial end face, wherein the mounting component(s) is / are fluidically connected to the cooling circuit and / or the oil circuit within the housing. In particular, at least one of the mounting components can be arranged on the axial end face of the housing and / or at least one of the mounting components can be arranged on the other axial end face of the housing. For example, the axial end face can be referred to as the front and the other axial end face as the rear. Preferably, at least one mounting component is an oil-carrying component. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0022] An attachment component is designed which is fluidically connected to the oil circuit to guide and / or control an oil flow. Alternatively or optionally, at least one attachment component is designed as a coolant-carrying attachment component which is fluidically connected to the cooling circuit to guide and / or control a coolant flow. In particular, the oil-carrying and coolant-carrying attachment component(s) are arranged on opposite sides of the housing. Preferably, the oil circuit has an oil sump, wherein the oil circuit runs from the oil sump to at least one drive component of the electric machine and / or at least one transmission component of the gearbox via the at least one oil-carrying attachment component within the housing.Preferably, the power take-off assembly, and more preferably the housing, has a coolant inlet and a coolant outlet, with the cooling circuit running from the coolant inlet to the coolant outlet via the at least one coolant-carrying component within the housing. Particularly preferably, the corresponding fluid connections for the respective component are integrated into the housing body. Preferably, a fluid connection between the fluid connection and the associated component can be established during the assembly of the component, preferably via a plug connection. The fluid-flow connection of the fluid-carrying components within the housing allows for a particularly compact and simple fluid routing.
[0023] In a further specific embodiment, the housing base is provided with a mounting opening for the axial mounting of the electric machine, wherein the at least one mounting component is arranged radially outside the mounting opening on the housing base. In particular, the mounting opening is arranged coaxially to the axis of rotation in the housing base and / or is open in the axial direction. The mounting opening is preferably dimensioned such that the electric machine, especially the stator, can be mounted or inserted into the housing space without hindrance in the axial direction. Preferably, the mounting opening is completely covered and / or closed by the housing cover in a final assembly state. All mounting components arranged on the axial end face or the front of the housing are particularly preferred. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0024] The components are arranged radially outside the mounting opening and / or distributed around the mounting opening. This ensures that the installation space required for the stator is not compromised. In other words, the mounted components do not obstruct the assembly or disassembly of the electric machine, particularly the stator, when installed.
[0025] In a further development, the power take-off arrangement includes a gearbox located in a gearbox section of the housing body, which is designed and / or suitable for translating the electric drive torque. For this purpose, the electric machine is coupled to a gearbox input, preferably an input shaft, and the power take-off is coupled to a gearbox output, preferably an output shaft, of the gearbox. The gearbox can be designed as a multi-stage or planetary gearbox, or the like. Preferably, the gearbox is designed for speed reduction, whereby a higher speed of the electric machine is converted into a higher speed at the power take-off. Particularly preferably, the gearbox input and output, or the input shaft and output shaft, are arranged coaxially and / or concentrically to the axis of rotation or the power take-off connection interface.
[0026] According to this further development, the gearbox section is designed to include the mounting opening. Specifically, the housing space is divided into a motor section for accommodating the electric motor and a gearbox section for accommodating the gearbox, with both sections being accessible via the mounting opening. In principle, the gearbox section and the motor section can be spatially and / or fluidically separated from each other in a final assembly state. Alternatively, the motor section and the gearbox section can also jointly form the housing space. In the simplest embodiment, the gearbox section is designed as a hollow cylindrical extension axially attached to the housing body, in which at least the gearbox is accommodated. Particularly preferably, the gearbox section is limited radially by the housing body and axially by the housing cover.Alternatively or optionally, it is provided that at least one mounting component is located within an axial installation length of the transmission section. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.
[0027] The at least one mounting component, and preferably all mounting component(s) arranged on the axial end face or front face, are arranged radially outside the gearbox section. The axial installation space of the mounting components can overlap the gearbox section in the axial direction and / or lie largely or completely within the axial installation length of the gearbox section. Thus, a power take-off arrangement is proposed in which the gearbox and the mounting components are arranged overlapping each other, resulting in a particularly compact and space-saving housing.
[0028] In a further development, it is provided that the housing has a bearing cover which is designed and / or suitable for receiving and / or supporting the gearbox within the gearbox section. The bearing cover is mounted axially with respect to the axis of rotation through the mounting opening into the gearbox section and is attached to an axial end face of the gearbox section. In particular, the bearing cover serves to receive at least one bearing assembly by which the input shaft is rotatably mounted. Furthermore, the bearing cover serves to receive and support all gearbox components. Preferably, the gearbox section has one or more mounting interfaces around its circumference by means of which the bearing cover is attached to the gearbox section. Specifically, the gearbox section and the motor section are spatially separated from each other by the bearing cover.By attaching the bearing cover to the gearbox section or the housing base, simple assembly of the gearbox and a particularly stable support base for the gearbox are achieved.
[0029] In a specific implementation, the bearing cover is designed to have a bearing section for receiving a bearing assembly of the gearbox, a receiving section for receiving the gearbox, and a fastening section for securing the bearing cover. The bearing section and the receiving section are arranged radially within the mounting opening, and the fastening section extends radially beyond the mounting opening and is attached to the gearbox section. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0030] In particular, the bearing section, the receiving section, and the mounting section are manufactured from a common material section, preferably in one piece. Preferably, a partition wall is formed between the bearing section and the receiving section, spatially separating the motor section and the transmission section from each other. Preferably, the partition wall lies, at least partially, in the mounting plane of the at least one attachment component mounted on the axial end face or the front face. Preferably, the bearing section and the receiving section are essentially hollow cylindrical, with the mounting section extending radially outwards towards the receiving section. The mounting section can be formed as a screw-on flange circumferentially around the axis of rotation or by several screw-on tabs spaced apart from each other in the circumferential direction.A bearing cover is therefore proposed, which can be easily mounted on the gearbox section.
[0031] In a further specification, it is provided that the housing cover is attached axially to an axial end face of the gear section and / or the bearing cover with respect to the axis of rotation. In particular, the housing cover and the bearing cover are mounted together on the gear section, preferably at least one mounting interface, preferably via at least one common fastening means. Preferably, the housing cover also has a mounting section complementary to the mounting section of the bearing cover. The housing cover can thus also have a screw-on flange circumferentially around the axis of rotation or several screw-on tabs spaced apart from each other in the circumferential direction. Specifically, the gear section can be reinforced, at least in the area of the mounting interfaces.Preferably, the housing cover has a cylindrical section arranged coaxially to the axis of rotation and a flanged section extending radially to the axis of rotation, with the mounting section adjoining the flanged section in a radial direction. Preferably, the flanged section and the mounting section extend in a common radial plane of the axis of rotation or parallel to a housing sealing plane. Preferably, the power take-off connection interface is arranged on the end face of the cylindrical section or formed by it. In particular, ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.
[0032] The auxiliary drive for the drive connection to the drive unit is led out of the housing via the cylinder section and / or can be connected to the drive unit. Preferably, the flange section forms the sealing flange of the housing cover, via which the housing cover is connected to the housing body. In its simplest embodiment, the flange section is designed as a flat plate. This results in a particularly flat design for the housing cover, making it especially easy and therefore cost-effective to manufacture.
[0033] In a further specific embodiment, at least one support structure is provided on the axial end face or front face of the housing base to support the transmission section. In particular, the support structure serves to counteract the weight force of the drive unit when mounted at the power take-off connection interface. The support structure thus has the function of transferring a weight force acting on the transmission section in the direction of a mounting structure, especially a chassis, of the commercial vehicle. Furthermore, the support structure serves to stiffen the housing base in order to reduce the bending loads acting on it. The support structure is preferably formed integrally with the housing base, preferably using a casting process. The support structure can be formed by a local increase in material on the axial end face of the housing base.Preferably, the support structure is designed to support the gearbox section over its entire axial length. This achieves a targeted increase in the stiffness of the housing body, thereby reducing the bending loads acting on the housing.
[0034] In a more detailed specification, the support structure extends radially and / or tangentially to the mounting opening towards a vehicle connection side of the housing. The vehicle connection side is understood here as the side of the housing via which the housing, in particular the housing base, is connected to the mounting structure of the commercial vehicle. The vehicle connection side can be formed by a bottom surface of the housing. Alternatively, depending on the installation situation, the vehicle connection side can also be a ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0035] The support structure can be located on the left and / or right side of the housing. Preferably, it is formed by one or more support ribs spaced apart from each other in the circumferential direction and / or formed between the mounting components on the housing body. Particularly preferably, the support structure, and especially at least one of the support ribs, has a constant cross-sectional profile in the radial or tangential direction. Specifically, at least one, several, or all of the support ribs are brought into contact with one or more vehicle mounting interfaces. Thus, a housing body is proposed that is designed to withstand high loads, with the support structure enabling a targeted transfer of the loads towards the mounting structure of the commercial vehicle.
[0036] In a further specification, it is provided that the housing base body has at least one or exactly one vehicle connection interface, which is designed and / or suitable for connecting the housing to a chassis of the commercial vehicle. The at least one vehicle connection interface is arranged on the support structure, specifically on the vehicle connection side. In particular, the housing base body is mechanically connected, or can be connected, to the chassis via the vehicle connection interface. Preferably, the housing base body has more than two, preferably more than four, and in particular more than six, vehicle connection interfaces, with at least one of the vehicle connection interfaces being arranged on the support structure on the vehicle connection side. Particularly preferably, the vehicle connection interfaces are each designed as a screw boss.Specifically, the axial distance between the power take-off (PTO) connection interface and the at least one vehicle connection interface should be as small as possible. For example, the axial distance between the PTO connection interface and the at least one vehicle connection interface can be less than 50 mm, preferably less than 20 mm, and specifically less than 10 mm. By placing the at least one vehicle connection interface close to the PTO connection interface, the lever arm between the drive unit and the vehicle connection interface can be reduced. (ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.)
[0037] The center of gravity of the drive unit is moved closer to the vehicle mounting interface, thereby increasing the rigidity of the housing. Furthermore, by arranging at least one vehicle mounting interface on the support structure, the force can be transmitted directly into the mounting structure.
[0038] In a specific implementation, the fluid-carrying components are formed by a heat exchanger fluidically connected to the cooling circuit and the oil circuit, an oil pump fluidly connected to the oil circuit, and an oil filter fluidly connected to the oil circuit, with the oil circuit and the cooling circuit being thermally coupled via the heat exchanger. Preferably, the heat exchanger is fluidically integrated into the oil circuit between the oil filter and the oil pump. Preferably, the heat exchanger and the oil pump are arranged in a lower housing half and / or the oil filter in an upper housing half of the housing. In particular, the heat exchanger is fluidically arranged downstream of the heat source, preferably the power electronics. Specifically, the heat exchanger serves for heat transfer between the cooling circuit and the oil circuit.In simplified terms, the heat exchanger serves as a heat sink for the cooling circuit or the oil circuit. Specifically, the oil pump is designed as a suction pump, which draws the oil from the oil sump and delivers it to at least one oil supply point of the electric motor and / or the transmission. The oil filter, in particular, serves to filter the oil, and is preferably located on the pressure side of the oil pump. Ideally, all mounting components are arranged on the main housing body. This allows for a particularly simple and cost-effective design of the housing cover.
[0039] In a first embodiment, it is provided that the oil pump, the oil filter, and the heat exchanger are arranged together on the axial end face or the front face of the housing base. Preferably, the heat exchanger is arranged at an angle to the housing base relative to a vertical axis of the housing. In particular, the heat exchanger has an oil inlet and an oil outlet, which are arranged diagonally opposite each other. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0040] The oil pump can be connected to the oil inlet via at least one oil inlet channel, and the oil filter can be connected to the oil outlet via at least one oil outlet channel. Preferably, the oil inlet channel and / or the oil outlet channel are formed directly in the housing body, for example by a bore, or by at least one line routed within the housing space. The oil inlet channel and / or the oil outlet channel can extend substantially along the axial end face or the front face of the housing body. In particular, the inclined position of the heat exchanger frees up additional installation space, which, for example, allows for the later arrangement of another vehicle connection interface, particularly in the area of the heat exchanger, or allows the housing body to be made narrower. Furthermore, the arrangement of all mounting components on the axial end face or...The front side simplifies assembly and shortens the length of the fluid channels.
[0041] In an alternative embodiment, the oil filter and oil pump are arranged together on the axial end face or front of the housing base, and the heat exchanger is arranged on the other axial end face or rear of the housing base. Preferably, the heat exchanger is arranged transversely to the housing base relative to a vertical axis of the housing. The oil inlet channel and / or the oil outlet channel can extend essentially between the axial end faces within the housing base. This allows for simple channel routing through the housing base. Furthermore, arranging the heat exchanger on the rear of the housing creates additional space on the front, enabling more flexible design options for the support structure. In particular, an additional support structure can be used instead of the heat exchanger.At least one additional support rib must be formed on the housing base body, which further increases the rigidity of the housing base body. Furthermore, the mounting component with the largest installation volume is moved away from the power take-off connection interface, so that the axial installation space for the mounting components on the front can be reduced in favor of housing rigidity. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.
[0042] In a further development, the coolant outlet is arranged opposite the heat exchanger on the front of the housing base. In particular, the heat exchanger has a coolant inlet and a coolant outlet, which are arranged diagonally opposite each other or crosswise to the oil inlet and oil outlet. The coolant inlet can be connected to the coolant inlet via at least one coolant inlet channel, and the oil outlet via at least one coolant outlet channel. Preferably, the coolant inlet channel and / or the coolant outlet channel are formed directly in the housing base, for example, by a bore, or by at least one line routed within the housing. Preferably, the oil channels and the coolant channels run parallel to each other or without intersecting.The coolant inlet channel and / or the coolant outlet channel can extend essentially between the axial end faces in the housing body, preferably parallel to the oil channels. Particularly preferred are the oil inlet, oil outlet, coolant inlet, and coolant outlet each connected to their respective fluid channel via a fluid connection. This results in particularly simple assembly of the heat exchanger. Furthermore, by arranging the coolant outlet on the front, the original connection interface of the coolant circuit can be retained.
[0043] In a further specific implementation, the housing base is provided to have at least one or exactly one recess complementary to the mounting component, in which the mounting component is recessed. In particular, the at least one recess is produced using a primary forming technique, preferably within a die-casting process. It is especially preferred that the recess is open outwards in at least one axial direction with respect to the axis of rotation. In other words, the mounting component is inserted or can be inserted into the corresponding recess in the axial direction. Preferably, the at least one mounting component is positively engaged and / or precisely fitted within the recess. In particular, the recess forms a negative contour of the corresponding mounting component.Specifically, the mounting component is fluid-tightly received in the corresponding recess, so that it is sealed within the recess against the housing base. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03 particularly preferentially features this.
[0044] The housing body has a recess on the rear side that is complementary to the heat exchanger, in which the heat exchanger is recessed. Alternatively or optionally, the housing body can have a recess on the front side that is complementary to the oil pump and / or the oil filter, in which the oil pump or the oil filter is recessed. Preferably, all fluid connections necessary for the respective component open within the recess, so that they are fluidically connected to the respective circuit within the recess. The recesses allow the drive components to be easily recessed into the housing body, thereby reducing the axial length of the power take-off assembly.Furthermore, by recessing the mounting components on the front, the housing base body can be pulled further towards the auxiliary drive connection interface, thereby increasing stiffness and simultaneously reducing the distance to the vehicle connection interfaces.
[0045] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention. These will show:
[0046] Fig. 1 shows a secondary drive arrangement in a sectional view as an embodiment of the invention;
[0047] Fig. 2 shows the auxiliary drive arrangement in three-dimensional representation with a mounted drive unit;
[0048] Fig. 3 shows an axial front view of the auxiliary drive assembly;
[0049] Fig. 4 shows a detailed view of the sectional representation of Fig. 1;
[0050] Fig. 5 shows a front view of a housing base body of the auxiliary drive assembly from Fig. 1 in a perspective view; ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0051] Fig. 6 shows a front view of a bearing cover of the auxiliary drive assembly from Fig. 1 in a perspective view;
[0052] Fig. 7 shows a front view of a housing cover of the auxiliary drive assembly from Fig. 1 in a perspective view;
[0053] Fig. 8 shows a bottom view of the auxiliary drive arrangement from Fig. 1 in a perspective view;
[0054] Fig. 9 shows a rear view of an alternative embodiment of the auxiliary drive arrangement in a perspective view;
[0055] Fig. 10 shows a rear view of the auxiliary drive assembly from Fig. 9 in a sectional view;
[0056] Fig. 11 shows a front view of a housing base body of the auxiliary drive assembly from Fig. 9 in a perspective view;
[0057] Fig. 12 shows a side view of the auxiliary drive arrangement from Fig. 9;
[0058] Fig. 13 shows a detailed view of another alternative embodiment of the auxiliary drive arrangement in a perspective view.
[0059] Figure 1 shows a power take-off arrangement 1, which is designed to drive an attachment (not shown) that can be coupled to and / or is coupled to a commercial vehicle. For this purpose, the power take-off arrangement 1 has a power take-off 2, via which the attachment can be driven directly or via a drive unit 3, as shown in Figure 2.
[0060] The power take-off arrangement 1 includes an electric machine 4, which generates an electric drive torque for the power take-off 2. The electric machine 4 comprises a stator 5 and a rotor 6, wherein the rotor 6 is arranged radially inside the stator 5. Furthermore, the electric machine 4 includes a ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0061] Rotor shaft 7, which is non-rotatably connected to the rotor 6 and is rotatably mounted with respect to a rotation axis 100.
[0062] The power take-off assembly 1 includes a gearbox 8, through which the electrical drive torque is transmitted to the power take-off 2. The gearbox 8 has an input shaft 9 and an output shaft 10, which are arranged coaxially to the axis of rotation 100. For this purpose, the gearbox 8 is, for example, designed as a planetary gearbox, wherein the input shaft 9 is non-rotatably connected to a sun gear 11 and the output shaft 10 to a planet carrier 12. The rotor shaft 7 is in turn non-rotatably connected to the input shaft 9, and the power take-off 2 is non-rotatably connected to or formed by the output shaft 10. Several planet gears 13 are rotatably mounted on the planet carrier 12, which mesh with the sun gear 11 on one side and with a ring gear 14 on the other.
[0063] The auxiliary drive assembly 1 has a housing 15, which comprises a housing base 16 and a housing cover 17. The housing base 16 and the housing cover 17 are connected to each other at least indirectly in the axial direction with respect to the axis of rotation 100.
[0064] The housing 15 essentially comprises a motor section 18 for accommodating the electric machine 4 and a transmission section 19 for accommodating the gearbox 8, wherein the motor section 18 and the transmission section 19 are spatially and / or fluidically separated from one another. Furthermore, the housing 15 has an oil chamber 20, which is located in a base region of the housing 15 or radially below the motor section 18 and the transmission section 19. An oil sump may be arranged in the oil chamber 20, into which oil from the motor section 18 and / or the transmission section 19 can flow or drip and is collected.
[0065] Furthermore, the auxiliary drive arrangement 1 has power electronics 21, which are located on a radial outer side, in particular radially opposite the oil-ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0066] The space 20 is located on the upper side of the housing base 16. The power electronics 21 are electrically connected to the electric machine 4 and serve to control and supply power to the electric machine 4.
[0067] Figure 2 shows the power take-off assembly 1 in a perspective view, with the housing 15 graphically suppressed to better illustrate a heat transfer system 22 of the power take-off assembly 1. The heat transfer system 22 has a cooling circuit 23 and an oil circuit 24, which are thermally coupled. The heat transfer system 22 also has several attachment components 25, which are designed to control and / or guide a fluid of the cooling circuit 23 and / or the oil circuit 24.
[0068] The cooling circuit 23 serves to cool the power electronics 21, with the cooling circuit running section by section through the housing 15. For this purpose, the secondary drive arrangement 1 has a coolant inlet 26 and a coolant outlet 27, via which the cooling circuit 23 can be connected to a cooling system of the commercial vehicle. The power electronics 21 are arranged fluidically between the coolant inlet 26 and the coolant outlet 27, so that the cooling circuit 23 runs section by section through the power electronics 21.
[0069] The oil circuit 24 serves to cool and / or lubricate the electric machine 4 and / or the gearbox 8, wherein the oil circuit 24 runs closed within the housing 15. For this purpose, oil is supplied along the oil circuit 24 from the oil chamber 20 to the electric machine 4, preferably to the rotor 6 and / or the stator 5, and / or the gearbox 8, and then collected again in the oil chamber 20.
[0070] The mounting components 25 are designed as an oil pump 28, an oil filter 29, and a heat exchanger 30, all of which are mounted axially with respect to the axis of rotation 100 on an axial end face 102 of the housing 15, in particular a front face, on the housing base body 16, as shown in Figure 3. The heat exchanger 30 is fluidically integrated into the oil circuit 24 on one side and into the cooling circuit 23 on the other. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0071] The cooling circuit 23 and the oil circuit 24 are thermally coupled via the heat exchanger 30 for heat transfer. The heat exchanger 30 has an oil inlet 31 and an oil outlet 32 for connecting the oil circuit 24, as well as a coolant inlet 33 and a coolant outlet 34 for connecting the cooling circuit 23. At least the coolant outlet 27 is formed by the coolant outlet 34 or is located directly on the heat exchanger 30.
[0072] The oil pump 28 is designed to pump oil from the oil chamber 20 along the oil circuit 24 to several oil supply points 35a, 35b, wherein the oil pump 28 is connected on a suction side to the oil chamber 20 and on a pressure side to the oil inlet 31 of the heat exchanger 30. The oil filter 29 serves to filter the oil circulating along the oil circuit 24, which for this purpose passes through the oil filter 29. The oil filter 29 is fluidically integrated into the oil circuit 24 between the oil outlet 32 and the oil supply points 35a, 35b. In simplified terms, the heat exchanger 30 is fluidically arranged between the oil pump 28 and the oil filter 29, with the attachment components 25 being fluidly connected to each other within the housing 15.
[0073] In the illustrated embodiment, the drive unit 3 is designed as a hydraulic pump, which is configured to transmit a power take-off to the attachment. For this purpose, the drive unit 3 is attached to the housing cover 17 via a power take-off connection interface 36 arranged on the housing cover 17, as shown, for example, in Figure 1 or 3, and connected to the power take-off 2.
[0074] Figure 3 shows the housing 15 with the mounting components 25 in an axial front view, showing that all mounting components 25 are axially mounted on the housing base 16 at the axial end face 102 with respect to the axis of rotation 100, as indicated in Figure 1. The mounting components 25 are arranged radially outside the transmission section 19 in a continuous distribution. The heat exchanger 30 and the oil pump 28 are located in a lower housing half with respect to a vertical axis 105 of the housing, and the oil filter 29 is located in the lower housing half.
[0075] arranged in an upper housing half. The heat exchanger 30 is inclined relative to the vertical axis 105, which allows it to be arranged in a space-saving manner on the axial end face 102.
[0076] The mounting components 25 are axially offset to the rear in an axial direction with respect to the axis of rotation 100 relative to the auxiliary power connection interface 36 on the housing base body 16, wherein the mounting components 25 are preferably arranged within an axial installation length 106, as shown in Figure 1, of the gearbox section 19, so that an installation space for the mounting components 25 is arranged offset from an installation space of the drive source 3.
[0077] The housing cover 17 has a cylindrical section 37 arranged coaxially to the axis of rotation 100, as well as a flanged section 38 and a mounting section 39, which extend radially with respect to the axis of rotation 100, preferably in a common radial plane or parallel to the housing sealing plane 101. The power take-off connection interface 36 is arranged on the end face of the cylindrical section 37 or is formed by it, with the power take-off 2 being guided coaxially and / or concentrically to the axis of rotation 100 through the cylindrical section 37. In a mounted state, the drive unit 3 is connected to the power take-off 2 via a drive connection, for example, a plug connection, and simultaneously mechanically, for example, via a screw connection, to the cylindrical section 37 or the power take-off connection interface 36.
[0078] As shown in Figure 4, the housing base 16 has a mounting opening 40 through which the electric machine 4 and the gearbox 8 can be mounted axially with respect to the axis of rotation 100 into the housing base 16. For this purpose, the mounting opening 40 is designed as a through-opening extending coaxially to the axis of rotation 100, which completely passes through the gearbox section 19, so that the electric machine 4, in particular the stator 5, can be inserted axially with respect to the axis of rotation 100 through the gearbox section 19 into the motor section 18. For this to be possible, the mounting components 25 arranged on the axial end face 102 must be arranged radially outside the mounting opening 40. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0079] The housing 15 also has a bearing cover 41, which serves to receive and / or support the gearbox 8 within the gearbox section 19. The bearing cover 41 has a bearing section 42, which serves to receive a bearing assembly 43 of the gearbox. The bearing assembly 43 is, for example, designed as a rolling bearing, which serves to rotatably support the input shaft 9. Furthermore, the bearing cover has a receiving section 44 in which the gearbox 8 is received and / or supported. For this purpose, the ring gear 14 can, for example, be connected to the receiving section 41 in a rotationally fixed manner, in particular by frictional and / or positive locking. In addition, the bearing cover 41 has a fastening section 45, through which the bearing cover 41 is fastened to the housing body 16, in particular the gearbox section 19, at its end face in the axial direction with respect to the axis of rotation 100.
[0080] The bearing section 42 and the receiving section 44 are essentially designed as two hollow cylindrical sections, which are arranged radially within the mounting opening 40. The fastening section 45 extends radially beyond the mounting opening 40 with respect to the axis of rotation 100, so that it is supported axially at its end face against the gearbox section 19.
[0081] The gearbox section 19 is spatially limited from the motor section 18 by the bearing cover 41, with a partition wall 46 being formed between the bearing section 42 and the receiving section 44, which separates the gearbox section 19 from the motor section 18.
[0082] Figure 4 further illustrates that the housing cover 17 rests axially with respect to the axis of rotation 100 at the axial end face 102 against the bearing cover 41 in a housing sealing plane 101 and covers the mounting opening 40 in the axial direction. For this purpose, the housing cover 17, with its flange section 38, seals axially against the bearing cover 41, in particular the receiving section 44, and is connected via the mounting section 39 to the fastening section 45. [ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03]
[0083] or the housing base body 16. For example, the mounting section 39 and the fastening section 45 can be fixed to the housing base body 16 by means of a common fastening means, not shown.
[0084] The housing cover 17 also has a further bearing section 47, which serves to accommodate a further bearing device 43b, wherein the output shaft 10 or the auxiliary drive 2 is rotatably mounted in the housing cover 17 via the further bearing device 43b.
[0085] Figure 5 shows the axial end face 102 of the housing base body 16, where it can be seen that the gear section 19 has several, for example exactly 4, circumferentially spaced fastening interfaces 48 on its outer circumference, via which the bearing cover 41 and the housing cover 17 are connected to each other. For example, the fastening interfaces 48 are each formed by a screw boss, which is formed on an outer circumference of the gear section 19 and each serves for the axial reception of a fastening element, for example a fastening screw.
[0086] Figure 5 further shows that the housing base body 16 has two support structures 49a, 49b integrally formed on the axial end face 102, which serve to support and / or stiffen the transmission section 19. The two support structures 49a, 49b are formed between the transmission section 19 and a mounting surface 50 of the attachment components 25, with the two integral structures 49a, 49b extending axially with respect to the axis of rotation 100 over the entire axial length 106 of the transmission section 19 and substantially radially and / or tangentially to the mounting opening 40 in the direction of a vehicle connection side 104. For example, both component structures 49a, 49b are each formed by a supporting rib which has a constant cross-sectional profile in the direction of the vehicle connection side 104.Here, one of the fastening interfaces 48 is arranged circumferentially between the two support structures 49a, 49b and / or reinforced by the two support structures 49a, 49b. In an installation situation, this is thus the one described by ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.
[0087] The force generated by the drive source 3 is transferred via the housing cover 17 and the bearing cover 41 to the transmission section 19 and is directed or supported via the support structures 49a, 49b in the direction of the vehicle connection side 104, preferably into a mounting structure of the vehicle.
[0088] Figure 6 shows the axial end face 102 of the bearing cap 41, showing that the bearing cap 41 also has several, preferably four, fastening sections 45 designed to complement the fastening interfaces 48 of the housing base body 16, by means of which the bearing cap 41 can be fixed to the transmission section 19 in the axial direction and simultaneously in the circumferential direction. The fastening sections 45 are designed, for example, as radially outwardly directed screw tabs, by means of which the bearing cap 41 can be fastened to the respective fastening interface 48 in the axial direction by means of the fastening means and can simultaneously be received in a form-fitting manner within the respective fastening interface 48 in the circumferential direction.The bearing cover 41, in particular the receiving section 44, is reinforced in the area of the fastening sections 45, thereby achieving an additional increase in the stiffness of the housing 5, in particular of the bearing cover 41.
[0089] Furthermore, it can be seen that the bearing cap 41 has a through-opening 51 extending coaxially to the axis of rotation 100, through which the input shaft 9 can be guided into the gearbox 8. The receiving section 44 also has a circumferential positive-locking contour 52 on its inner circumference, by means of which the ring gear 14 is fixed to the bearing cap 41 in a rotationally fixed manner in the circumferential direction.
[0090] Figure 7 shows the axial end face 102 of the housing cover 17, showing that the housing cover 17 has several, in particular exactly four, mounting sections 39, which are designed to complement the fastening sections 45 of the bearing cover 41. For example, the mounting sections 39 are each designed as a further radially outwardly directed screw-on tab, via which the housing cover 17 can be fastened axially to the respective fastening section 45 of the bearing cover 41 by means of the fastening means. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0091] Furthermore, it can be seen that the flange section 38 and the mounting sections 39 lie in a common plane, preferably the housing sealing plane 101, which allows the housing cover 17 to be designed to be particularly flat. The cylinder section 37 is arranged with an axial projection towards the flange section 38, with several stiffening ribs 53 formed between the cylinder section 37 and the flange section 38. These ribs are evenly spaced from one another in the circumferential direction with respect to the axis of rotation 100 and extend over the axial projection to the auxiliary drive connection interface 36. This results in a housing cover 17 that is characterized by increased stiffness and a particularly flat design.
[0092] Figure 8 shows the vehicle connection side 104, in particular a lower side, of the power take-off assembly 1, showing that the housing base 16 has several vehicle connection interfaces 54 on the vehicle connection side 104, which serve to connect the housing 15 to the mounting structure of the commercial vehicle (not shown). The vehicle connection interfaces 54 are each designed as a screw boss, via which the housing base 16 can be connected to the mounting structure, in particular by bolting. At least two of the vehicle connection interfaces 54 are arranged adjacent to, in particular directly adjacent to, the transmission section 19, so that a load introduced via the support structures 49a, 49b can be transferred to the mounting structure via the vehicle connection interface 54.For example, at least one of the vehicle connection interfaces 54 or another vehicle connection interface, not shown, can be arranged directly on one or both support structures 49a, 49b on the vehicle connection side 104, whereby the loads can be transferred directly via the support structures 49a, 49b into the mounting structure of the vehicle.
[0093] Figure 9 shows an alternative embodiment of the auxiliary drive arrangement 1, wherein the heat exchanger 30 is arranged axially with respect to the axis of rotation 100 on a further axial end face 103 opposite the axial end face 102, in particular a rear face. The heat exchanger 30 can be ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0094] The heat exchanger 30 is mounted directly on the housing base 16 or on a further housing cover 58. It is arranged on the housing 15 in such a way as to allow simple fluid flow to the other components 25 located on the axial end face 102, in particular the oil pump 28 and the oil filter 29. The heat exchanger 30 is arranged transversely in the area of the oil chamber 20 or the lower housing half, so that the oil pump 28 and the oil filter 29 can be fluidically connected to the heat exchanger 30 without any crossover.
[0095] Thus, an oil inlet channel 55, shown only schematically, extends section by section in the axial direction with respect to the axis of rotation 100 from the oil pump 28 arranged on the axial end face 102 through the engine section 18 to the oil inlet 31 arranged on the further axial end face 103, as shown in Figure 10. Furthermore, an oil outlet channel 56, shown only schematically, extends section by section in the axial direction with respect to the axis of rotation 100 and / or parallel to the oil inlet channel 55 from the oil outlet 32 arranged on the further axial end face 103, as shown in Figure 10, through the engine section 18 to the oil filter 29 arranged on the axial end face 102.Furthermore, a coolant inlet channel 57, only schematically indicated, runs section by section in axial direction with respect to the axis of rotation 100 and / or parallel to the oil inlet channel 55 and / or the oil outlet channel 56 from the coolant inlet 26 through the engine section 18 to the coolant inlet 33 arranged on the further axial end face 103, as shown in Figure 10.
[0096] The oil inlet channel 55 thus connects a pressure side of the oil pump 28 directly to the oil inlet 31, the oil outlet channel 56 connects an inlet side of the oil filter 28 directly to the oil outlet 32, and the coolant inlet channel 57 connects the coolant inlet 26 directly to the coolant inlet 33 of the heat exchanger 30. For example, the oil inlet channel 55 and / or the oil outlet channel 56 and / or the coolant inlet channel 57 can be formed directly, particularly by primary forming, in the housing base body 16 in order to connect the heat exchanger 30 to the oil circuit 24 and / or the coolant circuit 23. Alternatively, ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0097] However, the oil inlet channel 55 and / or the oil outlet channel 56 and / or the coolant inlet channel 57 can also be formed by a separate fluid line routed through the housing base body 16, in particular the oil chamber 20.
[0098] Figure 10 shows the heat exchanger 30 mounted on the further axial end face 103 in a sectional view, showing that the oil inlet 31 and the oil outlet 32 are arranged diagonally opposite each other, with the oil inlet 31 being on the side of the oil pump 28 and the oil outlet 32 on the side of the oil filter 29, so that a crossover-free fluid flow in the direction of the respective attachment component 25 is enabled.
[0099] Furthermore, it can be seen that the heat exchanger 30 is mounted directly on the further axial end face 103 of the housing base body 16, whereby the heat exchanger 30 can be fluidically connected directly to the oil inlet channel 55, the oil outlet channel 56 and the coolant inlet channel 57 via, for example, several fluid connections formed in the housing base body 16. The oil inlet 31, the oil outlet 32 and the coolant inlet 33 can thus each be formed by a simple bore, via which they can be fluidically connected to the respective fluid connection, for example by a push-fit connection.
[0100] Figure 11 shows the axial end face 102 of the housing base body 16 according to the alternative embodiment from Figure 8, wherein the rearward arrangement of the heat exchanger 30 provides additional clearance at the axial end face 102 of the housing base body 16, allowing for the arrangement of a further support structure 49c in the area of the heat exchanger 30. This further support structure 49c extends essentially tangentially from the transmission section 19 or the mounting opening 40 towards the vehicle connection side 104, thereby providing additional support for the transmission section 19 and thus increasing the rigidity of the housing 15. ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03
[0101] Figure 12 shows a side view of the housing base 16 according to the alternative embodiment from Figure 8 with the heat exchanger 30 arranged on the further axial end face 10, wherein the housing base 16 has a recess 59 complementary to the heat exchanger 30, in which the heat exchanger 30 is recessed axially with respect to the axis of rotation 100. For example, the heat exchanger 30 can be positively engaged and / or precisely fitted within the recess 59. By eliminating the heat exchanger 30 on the axial end face 10, the oil chamber 20 could be extended axially in the direction of the auxiliary drive connection interface 36 by also arranging the oil pump 28 and the oil filter 29 recessed in the mounting surface 50, as shown in Figure 5, and by using the additional installation space gained thereby to enlarge the oil chamber 20 by axially extending the motor section 19 or the oil chamber 20.This also allows the axial distance between the vehicle connection interfaces 54 and the auxiliary power connection interface 36 to be reduced, so that an additional increase in stiffness for the housing 15 can be achieved.
[0102] Figure 13 shows a detailed view of the axial end face 102 according to the alternative embodiment from Figure 8, wherein the coolant drain 27 is arranged opposite the heat exchanger 30 located on the further axial end face 103 on the axial end face 102 of the housing base body 16. The coolant drain 27 is located on the mounting surface 50 between the two support structures 49a, 49b. For example, the coolant drain 27 is arranged axially opposite the coolant outlet 34 of the heat exchanger 30, which is preferably connected to the coolant outlet 34 via a coolant outlet channel (not shown). For this purpose, the coolant outlet channel can be extended section by section in the axial direction with respect to the axis of rotation 100 and / or parallel to the coolant inlet channel 57 from the coolant outlet 34 through the engine section 18 to the coolant drain 26 located on the axial end face 102.As indicated in Figure 12, the coolant outlet 34 is therefore no longer arranged on the outside of the heat exchanger 30, but via the housing 15, preferably a ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03.
[0103] A further fluid connection is fluidically linked to the coolant drain 26. This allows the original customer interface for connection to the vehicle's cooling system to be retained. ZF Friedrichshafen AG File 304401
[0104] Friedrichshafen 2025-02-03
[0105] Reference sign
[0106] 1. Power take-off arrangement
[0107] 2 Power take-off
[0108] 3 Drive unit
[0109] 4 electric machine
[0110] 5 Stator
[0111] 6 Rotor
[0112] 7 Rotor shaft
[0113] 8 gearboxes
[0114] 9 Input shaft
[0115] 10 Output shaft
[0116] 11 Sun wheel
[0117] 12 planetary carriers
[0118] 13 planetary gears
[0119] 14 Ring gear
[0120] 15 cases
[0121] 16 Housing base bodies
[0122] 17 Housing covers
[0123] 18 Engine section
[0124] 19 Gearbox section
[0125] 20 Oil room
[0126] 21 Power Electronics
[0127] 22 Heat transfer system 23 Cooling circuit
[0128] 24 Oil circuit
[0129] 25 attachment components
[0130] 26 Coolant inlet
[0131] 27 Coolant drain
[0132] 28 Oil pump
[0133] 29 oil filters
[0134] 30 heat exchangers
[0135] 31 Oil inlet ZF Friedrichshafen AG File 304401
[0136] Friedrichshafen 2025-02-03
[0137] 32 Oil outlet
[0138] 33 Coolant inlet
[0139] 34 Coolant outlet
[0140] 35a, b Oil supply points
[0141] 36 Power take-off connection interface 37 Cylinder section
[0142] 38 Flange section
[0143] 39 Fastening section
[0144] 40 Mounting opening
[0145] 41 bearing caps
[0146] 42 Storage section
[0147] 43a, b Storage facility
[0148] 44 Recording section
[0149] 45 Fastening section
[0150] 46 Partition wall
[0151] 47 further recording section
[0152] 48 Mounting interface
[0153] 49a, b, c Support structure
[0154] 50 mounting surface
[0155] 51 Passage opening
[0156] 52 Form-fitting contour
[0157] 53 stiffening ribs
[0158] 54 Vehicle connection interfaces 55 Oil inlet channel
[0159] 56 Oil outlet channel
[0160] 57 Coolant inlet
[0161] 58 more case covers
[0162] 59 In-depth study
[0163] 100 rotary axis
[0164] 101 Housing sealing plane
[0165] 102 axial front face
[0166] 103 further axial front face
[0167] 104 Vehicle connection page ZF Friedrichshafen AG File 304401
[0168] Friedrichshafen 2025-02-03
[0169] 105 Vertical axis 106 Axial length
Claims
ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03 Patent claims 1. Electric power take-off arrangement (1 ) for a commercial vehicle, - with a power take-off (1); - with an electric machine (4) to provide an electric drive torque for the auxiliary drive (2), wherein the electric machine (4) defines a rotation axis (100); - with a heat transfer system (22) for transferring heat generated during the operation of the electric machine (4) between a cooling circuit (23) and an oil circuit (24), wherein the heat transfer system (22) has several fluid-carrying attachment components (25); - with a housing (15) for receiving the electric machine (4), wherein the housing (15) has a housing base body (16) and a housing cover (17), wherein the housing base body (16) and the housing cover (17) are connected to each other in an axial direction with respect to the axis of rotation (100) at an axial end face (102) of the housing (15), and wherein the housing cover (17) has a power take-off connection interface (36) arranged coaxially to the axis of rotation (100) for connecting a drive device (3) to the power take-off (2); characterized by the fact that at least one of the attachment components (25) of the heat transfer system (22) is mounted on the housing base body (16) axially offset in an axial direction with respect to the axis of rotation (100) to the power take-off connection interface (36), so that a space for the at least one attachment component (25) is arranged offset to the power take-off connection interface (36).
2. Electric power take-off arrangement (1) according to claim 1, characterized in that the at least one mounting component (25) is optionally arranged on the axial end face (102) of the housing (15) or on an end face (103) of the housing (15) opposite the axial end face (102), wherein the mounting component (25) is fluidically connected within the housing (15) to the cooling circuit (23) and / or the oil circuit (24). ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03 3. Electric auxiliary drive arrangement (1) according to claim 1 or 2, characterized in that the housing base body (16) has a mounting opening (40) for axial mounting of the electric machine (4), wherein the at least one mounting component (25) is arranged radially outside the mounting opening (40) on the housing base body (16).
4. Electric power take-off arrangement (1) according to one of the preceding claims, characterized by a gearbox (8) arranged in a gearbox section (19) of the housing body (16) for translating the electric drive torque, wherein the electric machine (4) is coupled to a gearbox input and the power take-off (2) to a gearbox output of the gearbox (8), wherein the gearbox section (19) comprises the mounting opening (40) and / or the at least one mounting component (29) is arranged largely within an axial installation length (106) of the gearbox section (19).
5. Electric power take-off arrangement (1) according to claim 4, characterized in that the housing (15) comprises a bearing cover (41) for receiving and / or supporting the gearbox (8) within the gearbox section (19), wherein the bearing cover (41) is mounted in the gearbox section (9) in an axial direction with respect to the axis of rotation (100) via the mounting opening (40) and is attached to the gearbox section (19) at the axial end face (102).
6. Electric power take-off arrangement (1) according to claim 5, characterized in that the bearing cover (41) has a bearing section (42) for receiving a bearing device (43a) of the gearbox (8), a receiving section (44) for receiving the gearbox (8) and a fastening section (45) for fastening the bearing cover (41), wherein the bearing section (42) and the receiving section (44) are arranged radially within the mounting opening (40) and the fastening section (45) is attached radially beyond the mounting opening (40) to the gearbox section (19).
7. Electric auxiliary drive arrangement (1) according to one of claims 4 to 6, characterized in that the housing cover (17) is axially oriented with respect to ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03 is attached to the axis of rotation (100) on the axial end face (102) on the gear section (19) and / or the bearing cover (41).
8. Electric auxiliary drive arrangement (1) according to one of claims 4 to 7, characterized in that at least one support structure (49a, b, c) is formed on the axial end face (102) of the housing base body (16) for supporting the gear section (19).
9. Electric power take-off arrangement (1) according to claim 7, characterized in that the support structure (49a, b, c) extends in a radial direction and / or in a tangential direction to the mounting opening (40) to a vehicle connection side (104) of the housing (5).
10. Electric power take-off arrangement (1) according to claim 7 or 8, characterized in that the housing base body (16) has at least one vehicle connection interface (54) for connecting the housing (15) to a mounting structure of the commercial vehicle, wherein the at least one vehicle connection interface (54) is arranged on the support structure (49a, b, c).
11. Electric power take-off arrangement (1) according to one of the preceding claims, characterized in that the fluid-carrying attachment components (25) are formed by a heat exchanger (30) fluidically connected to the oil circuit (24) and the cooling circuit (23), an oil pump (28) fluidically connected to the oil circuit (24) and an oil filter (29) fluidically connected to the oil circuit (24), wherein the cooling circuit (23) and the oil circuit (24) are thermally coupled to each other via the heat exchanger (30).
12. Electric power take-off arrangement (1) according to claim 11, characterized in that the oil pump (28), the oil filter (29) and the heat exchanger (30) are arranged together on the axial end face (102) of the housing base body (16). ZF Friedrichshafen AG File 304401 Friedrichshafen 2025-02-03 13. Electric auxiliary drive arrangement (1 ) according to claim 11, characterized in that the oil filter (29) and the oil pump (28) are arranged together on the axial end face (102) of the housing base body (16) and the heat exchanger (30) is arranged on an extended axial end face (103) of the housing base body (16) opposite the axial end face (102).
14. Electric auxiliary drive arrangement (1) according to claim 13, characterized in that the cooling circuit (23) has a coolant drain (27), wherein the coolant drain (27) is arranged opposite the heat exchanger (30) on the axial end face (102) of the housing base body (16).
15. Electric auxiliary drive arrangement (1) according to one of the preceding claims, characterized in that the housing base body (16) has a recess (59) complementary to the mounting component (25) in which the mounting component (25) is recessed.