Rotor for electric machine, method and assembly device

Abstract

The invention relates to a rotor (1) for an electric machine, comprising a laminated core (4) on which a plurality of windings (5, 6) of the rotor (1), which are formed separately from one another, are held, and at least one line element (12), which is formed separately from the windings (5, 6) and the laminated core (4), is arranged at least in some regions in a recess (17), the invention relates to a rotor (1) having a plurality of windings (5, 6), which have a conduit element (16) at least partially delimiting at least one cooling channel (16) through which a coolant can flow in the axial direction (15) of the rotor (1), and a recess (16) which extends between two of the windings (5, 6) adjacent in the circumferential direction (11) of the rotor (1), by means of which windings a respective magnetic pole (23, 24) of the rotor (1) can be produced in each case.

Description

Technical Field

[0001] The invention relates to a rotor for an electric machine according to the preamble of claim 1. The invention also relates to a method for producing a rotor according to the preamble of claim 5 and to an assembly device for producing a rotor for an electric machine according to claim 10. Background Art

[0002] WO 2008 / 028730 A1 discloses a rotor for an electric motor, which has a basic channel for cooling a conductor arranged on the rotor, the basic channel having a basic channel cross section, the rotor being designed such that a coolant can flow through the rotor during operation, and the basic channel cross section is reduced. Summary of the invention

[0003] The object of the present invention is to provide a rotor for an electric machine, a method for producing a rotor for an electric machine and an assembly device for producing a rotor for an electric machine, such that the rotor can be cooled particularly well and can be produced with particularly low complexity.

[0004] This object is achieved according to the invention by a rotor for an electric machine having the features of claim 1, by a method for producing a rotor for an electric machine having the features of claim 5, and by an assembly device for producing a rotor for an electric machine having the features of claim 10. Advantageous embodiments of the invention are the subject matter of the dependent claims and the description.

[0005] A first aspect of the invention relates to a rotor for an electric machine, which is in particular for a motor vehicle. The electric machine can be designed, for example, as a synchronous machine or an asynchronous machine. Preferably, the electric machine is designed as a separately excited synchronous machine, for example as a current-excited synchronous machine, which can in particular be called a current-excited synchronous motor (SSM machine). Preferably, the electric machine is provided for driving a motor vehicle, which can in particular be designed as a car, in particular a passenger car or a commercial vehicle. Therefore, in particular in the fully manufactured state of the motor vehicle, the motor vehicle has the electric machine, in particular the rotor.

[0006] In particular, in the fully manufactured state of the electric machine, the electric machine comprises the rotor, which in its fully manufactured state has its installation position in the electric machine. Preferably, the electric machine comprises a stator, in particular the stator is designed separately from the rotor. The electric power can be converted into mechanical power by means of the electric machine, so that the rotor can be driven by the stator and can therefore rotate relative to the stator about the motor rotation axis. The electric power can be provided, for example, by an on-board power system of a motor vehicle, which can be referred to in particular as an on-board power system. Via the rotor shaft of the rotor, the electric machine can at least provide the torque provided by the rotor, in particular for driving the motor vehicle.

[0007] The rotor has at least one laminated core, and a plurality of windings of the rotor, which are formed separately from each other, are held, in particular at least indirectly or directly, on the laminated core. In other words, the windings are at least indirectly or directly arranged on the laminated core or fixed on the laminated core.

[0008] The lamination stack can be formed in one piece or in multiple pieces. "Lamination stack formed in one piece" can be understood in particular to mean that the lamination stack is formed or produced in a single piece, that is, it is formed or produced from one component, for example, it is formed or produced from a single block. "Lamination stack formed in multiple pieces" can be understood in particular to mean that the lamination stack is multi-piece, that is, it is composed of multiple components formed separately from each other, which are connected to each other. The components of the lamination stack can be referred to in particular as single laminations. The lamination stack can be referred to in particular as a rotor lamination stack.

[0009] Preferably, the respective winding comprises at least one respective turn, for example a plurality of respective turns, and can be referred to in particular as a rotor winding or winding. The respective winding is preferably made of copper, so that the respective winding can be referred to in particular as a copper winding. The respective winding is preferably formed by a continuous conductor. A conductor can be understood in particular as an electrical conductor. The respective winding or a plurality of windings formed by a continuous conductor preferably form a respective coil. Preferably, the rotor comprises a plurality of coils.

[0010] In order to be able to cool the rotor particularly well and to be able to manufacture the rotor particularly cost-effectively, it is provided according to the invention that at least one pipe element which is designed separately from the winding and the laminated core is at least partially, in particular completely, arranged in a recess of the rotor, the pipe element at least partially, in particular completely, for example completely surrounding the cooling channel in the circumferential direction of the cooling channel, the cooling channel being flown through by a coolant in the axial direction of the rotor. In other words, the rotor has the pipe element, in particular the pipe element is arranged in addition to the winding and the laminated core, the pipe element being flown through by a coolant in the axial direction of the rotor and extending at least partially within the recess. The recess extends between two adjacent, in particular directly adjacent, windings in the circumferential direction of the rotor, by means of which, in particular during operation of the electric machine, the corresponding magnetic poles of the rotor are respectively generated or can be generated. This means that the recess is arranged, in particular at least partially or completely, in the circumferential direction of the rotor between adjacent, in particular directly adjacent, windings in the circumferential direction of the rotor, a first magnetic pole of the rotor is generated or can be generated by means of a first winding among the windings, and a second magnetic pole of the rotor different from the first magnetic pole is generated or can be generated by means of a second winding among the windings. In other words again, the rotor has a plurality of magnetic poles, in particular formed separately from one another, which can in particular be referred to as magnetic poles, wherein the recess extends, in particular in the circumferential direction of the rotor, between two adjacent, in particular directly adjacent magnetic poles of the magnetic poles in the circumferential direction of the rotor.

[0011] The operation of the motor can be understood in particular as an operating state, which is in particular the activation state of the motor, in which the rotor rotates or rotates relative to the stator, so that, for example, a torque can be provided via the rotor shaft. Preferably, the corresponding windings, in particular the corresponding coils, are passed with current in order to generate the corresponding magnetic poles. In other words, the corresponding windings, in particular the corresponding coils, are passed with current in order to generate the corresponding magnetic poles. This means that the corresponding magnetic poles are caused or can be caused, for example, by the corresponding windings or the corresponding coils being passed with current. "The recess extends between the windings adjacent in the circumferential direction of the rotor among the windings" can be understood in particular as that the recess extends between two coils adjacent in the circumferential direction of the rotor among the coils. The axial direction of the rotor preferably corresponds to the motor rotation axis. In other words, the axial direction of the rotor is preferably coaxial with the motor rotation axis.

[0012] For example, the piping element has at least one wall, which defines a cooling channel, especially completely surrounds the cooling channel in the circumferential direction of the cooling channel. For example, the piping element, especially the wall, defines the cooling channel at least partially, especially completely, in the radial direction of the rotor. In other words, the piping element, especially the wall - especially in the radial direction and / or circumferential direction of the rotor - at least partially, especially completely surrounds the cooling channel. Preferably, the cooling channel through which the coolant flows or can flow is formed or arranged for cooling the rotor, especially for cooling the winding. The coolant is preferably a fluid. For example, the coolant includes oil, or the coolant is oil, and the oil can be called cooling oil in particular.

[0013] The recess is configured, for example, as a slot of the rotor, which is in particular referred to as a rotor slot. Thus, the rotor can have a rotor slot cooling structure, in particular, the rotor slot cooling structure is flowed through by a fluid or a coolant. This means that the line element or the cooling channel is implemented or configured for rotor slot cooling.

[0014] For example, the recess is at least partially defined, in particular directly defined, by the windings, in particular the adjacent windings, in the circumferential direction of the rotor. In other words, the corresponding windings at least partially surround the recess in the circumferential direction of the rotor.

[0015] The present invention is based in particular on the following recognition and consideration: in an electric machine, in particular in an electrically excited synchronous machine, the requirements for the electric machine in terms of continuous torque and / or continuous power may be particularly high. The electric machine, in particular an electric machine with electrical excitation in the rotor, may in principle be limited by thermal boundary conditions in the rotor or thermal boundary conditions of the rotor in terms of continuous power. Therefore, it may be particularly important to conduct as much heat as possible from the rotor, that is, to achieve particularly good cooling. In principle, it can be considered that the rotor, in particular the SSM rotor, is cooled by a rotor shaft through which a fluid flows or a coolant flows and / or by an end plate or end cover cooled by a fluid or a coolant. However, it may be disadvantageous that such a cooler, in particular a cooler in the form of a rotor shaft and / or an end plate or an end cover, may be relatively far from or particularly far away from a heat source, in particular a rotor winding. Therefore, heat transport and therefore the cooling of the rotor, in particular the cooling of the rotor winding, may not be optimized. This means that, for example, only particularly small heat dissipation can be achieved, which may be disadvantageous.

[0016] In contrast, the rotor according to the present invention can be cooled particularly well. This can be achieved in particular in the following manner: in the rotor according to the present invention, the pipeline element (especially in the form of an additional coolant pipeline) is arranged or can be placed in a recess, especially a rotor slot. Therefore, a particularly good cooling effect can be achieved, especially for the winding. Therefore, especially during the operation of the motor, the temperature of the rotor can be kept particularly low. Therefore, for example, the continuous power of the motor can be particularly improved. In addition, the rotor according to the present invention can be manufactured particularly low-cost. This can be achieved, for example, in the following manner: when manufacturing the rotor, the assembly of the pipeline element can be performed after the assembly of the winding. This means that, for example, each winding can be arranged or assembled on the rotor first, and then the pipeline element can be arranged or assembled on the rotor. Here, for example, an assembly scheme suitable for assembling and manufacturing the rotor in large quantities can be realized. In particular, the structural changes of the rotor according to the present invention relative to the conventional rotor can be kept particularly small, so that the rotor can be manufactured particularly low-cost or particularly simply. In particular, the rotor can be cooled particularly effectively, in particular with particularly low costs, because the half of each of the two windings can be cooled by means of the line element, in particular by means of a part of the line element, that is, in the slot. By means of this line element or cooling tube, a coil of a pole and the respectively adjoining half of the adjacent coil can be cooled. This means, for example, that the number of line elements can be kept particularly small. As a result, the rotor can be manufactured particularly cost-effectively.

[0017] The line element is designed, for example, as a tube, which can be referred to in particular as a cooling tube. The line element can therefore be designed, for example, in a tubular shape. A cooling tube can be understood in particular as a tubular body. Preferably, the cooling tube has a circular cross section. Alternatively, the line element or the cooling tube can be designed as a profile body, in particular a profile tube, so that the cross section of the line element can be designed, for example, as a rectangular profile. The line element or the profile tube can have any cross-sectional shape that is possible in terms of manufacturing technology.

[0018] In another embodiment, a rotor shaft is provided which is formed separately from the winding and separately from the lamination group, and the lamination group which is connected to the rotor shaft in a rotationally fixed manner is provided, in particular directly on the rotor shaft. In other words, the lamination group is connected to the rotor shaft in a rotationally fixed manner in the radial direction of the rotor, in particular with reference to the motor rotation axis, on the outside of the rotor shaft, which is formed separately from the winding and separately from the lamination group. As a result, the rotor can be manufactured particularly inexpensively and / or the motor vehicle can be driven by the motor particularly advantageously via the rotor shaft. The rotor shaft can rotate relative to the stator about the motor rotation axis of the rotor shaft, wherein the rotation axis of the shaft corresponds to the motor rotation axis.

[0019] Preferably, it is provided that the coolant channel through which the coolant can flow extends in the rotor shaft. In other words, the coolant channel extends within the rotor shaft. This means that the coolant channel is at least partially, in particular completely, surrounded by the rotor shaft or formed by the rotor shaft.

[0020] Preferably, at least one channel is provided, through which a coolant can flow and which at least partially, in particular completely, extends in a component which is formed separately from the rotor shaft, the lamination stack and the line element. In other words, the channel is at least partially, in particular completely, defined by the component or formed by the component. In other words again, the component at least partially, in particular completely surrounds the channel. Thus, the component can be flowed through by a coolant.

[0021] Preferably, the channel is connected to the cooling channel in a fluid-conducting manner, in particular directly. In other words, the coolant flowing through the channel can be introduced into the cooling channel, which means that the cooling channel can be supplied with coolant through the channel or through the component. As an alternative or in addition, the coolant flowing through the cooling channel can be discharged from the cooling channel via the channel or via the component. Therefore, the channel is responsible for the conveying and / or providing and / or discharging of the coolant. Therefore, the cooling channel can be particularly advantageously supplied with coolant, or the coolant can be particularly advantageously discharged from the cooling channel, so that the rotor, in particular the winding, can be particularly well cooled. For example, the component is configured as a multi-piece, in particular a two-piece star disk component.

[0022] Preferably, it is provided that the coolant channel extending in the rotor shaft is connected, in particular directly connected, to the cooling channel via the channel extending in the component. In other words, the channel is arranged between the coolant channel and the cooling channel in the flow direction of the coolant flowing through the channel. As a result, the cooling channel can be supplied with coolant particularly advantageously via the rotor shaft and / or coolant can be discharged from the cooling channel particularly advantageously. As a result, the rotor, in particular the winding, can be cooled particularly advantageously.

[0023] In another scheme, it is provided that the coolant flowing through the coolant channel extending in the rotor shaft can be discharged from the coolant channel via the channel extending in the component and can be introduced, especially can be directly introduced into the cooling channel. In other words, the coolant flowing through the rotor shaft, especially the coolant channel, can be introduced into the cooling channel via the channel (i.e., via the component). This means that the channel or the cooling channel can be fed with coolant via the rotor shaft. It is preferably provided here that a second channel that can be circulated by the coolant and is spaced apart from the channel extends in the component, and the coolant flowing through the cooling channel can be discharged from the pipeline element via the second channel. In other words, the second channel is connected to the cooling channel in a flow-guiding manner, especially directly in a flow-guiding manner. For example, the pipeline element, especially the cooling channel, is connected to the channel in a flow-guiding manner, especially directly in a flow-guiding manner, at one end, and is connected to the second channel in a flow-guiding manner, especially directly in a flow-guiding manner, at the other end. Therefore, the component can not only be provided for supplying coolant to the cooling channel, but also can be provided for discharging coolant from the cooling channel. Therefore, the cooling of the rotor, in particular the cooling of the winding, can be carried out with particularly low expenditure. In this case, in particular, the production expenditure of the rotor can be kept particularly low. In addition, the rotor can be cooled particularly well.

[0024] For example, the coolant channel, the channel (which can be referred to in particular as the first channel), the cooling channel and the second channel form a common coolant path through which coolant can flow. In particular, the component can be provided for collecting coolant flowing through the rotor shaft, in particular through the coolant channel, for transporting the coolant into the cooling channel, and for discharging the coolant from the cooling channel or the line element. This can be achieved particularly reliably and / or particularly stably by means of the component, which is in particular referred to as the additional component.

[0025] In another embodiment, it is provided that the tubular element has a first length region, which at least partially, in particular completely defines the cooling channel, for example completely surrounds the cooling channel in the circumferential direction of the cooling channel, and the first length region is arranged in the recess, the recess extends in the circumferential direction of the rotor between a first winding and a second winding, by means of which a first magnetic pole is generated or can be generated, the second winding is adjacent to the first winding in the circumferential direction of the rotor, by means of which a second magnetic pole different from the first magnetic pole is generated or can be generated. In other words, the first length region of the tubular element is at least partially, in particular completely, arranged within the recess. This means that the first length region extends at least partially, in particular completely, within the recess.

[0026] It is preferably provided that the tubular element has a second length region connected at least indirectly to the first length region, the second length region at least partially, in particular completely defines a second cooling channel, for example completely surrounds the second cooling channel in the circumferential direction of the second cooling channel, the second cooling channel can be traversed by coolant in the axial direction of the rotor and is connected to the cooling channel in a fluid-conducting manner, in particular directly connected in a fluid-conducting manner. In other words, the second cooling channel is at least partially, in particular completely surrounded by the second length region of the tubular element or formed by the second length region. The second length region of the tubular element is arranged in a second recess of the rotor, the second recess is spaced apart from the recess in the circumferential direction of the rotor, the second recess extends in the circumferential direction of the rotor between the second winding and a third winding among the windings, the third winding is adjacent to the second winding in the circumferential direction, in particular directly adjacent, and a third magnetic pole of the rotor different from the magnetic poles is generated or can be generated by means of the third winding. In other words, the second cooling channel is at least partially, in particular completely arranged in the following recess, which is arranged between the second winding and the third winding in the circumferential direction of the rotor. Thus, three windings can be cooled by one line element. This means that the cooling of the rotor can be achieved with particularly low effort. In this case, in particular, the manufacturing effort of the rotor can be kept particularly low.

[0027] Preferably, the first and second length regions are connected to one another in a fluid-conducting manner, in particular at least indirectly or directly. For example, the first and second length regions are connected to one another in a fluid-conducting manner via a transverse region and / or a circumferential region. Preferably, the transverse region and / or the circumferential region adjoin the winding head of the rotor at least indirectly, in particular directly. The transverse region and / or the circumferential region are preferably part of the line element.

[0028] Preferably, the second cooling channel is connected to the second channel extending in the component in a fluid-conducting manner, in particular directly in a fluid-conducting manner. Preferably, the fluid flowing through the cooling channel can be discharged into the channel extending in the component via the second cooling channel. Preferably, the cooling channel can be circulated by a coolant in a first flow direction, and the second cooling channel can be circulated by a coolant in a second flow direction different from the first flow direction, the flow directions preferably extending in opposite directions to each other.

[0029] A second aspect of the invention relates to a method for producing a rotor for an electric machine, the rotor having at least one laminated core, in particular the rotor being a rotor according to the first aspect of the invention. Advantages and advantageous solutions of the first aspect of the invention can be regarded as advantages and advantageous solutions of the second aspect of the invention, and vice versa.

[0030] In order to be able to cool the rotor particularly well and to be able to manufacture the rotor particularly cost-effectively, it is provided according to the invention that at least one pipe element is arranged in the circumferential direction of the rotor between two windings of the rotor, the two windings being constructed separately from each other and being held, in particular directly held, on the lamination stack of the rotor, in particular already held, in particular already directly held on the lamination stack of the rotor, the pipe element being separated from the windings and being constructed separately from the lamination stack. In other words, the pipe element is arranged or assembled, in particular fixed, between the windings (the windings being arranged on the lamination stack and connected, in particular directly connected, in particular already arranged on the lamination stack and connected, in particular directly connected) in the circumferential direction of the rotor. This means that the pipe element is arranged between the windings after the windings are arranged on the lamination stack, in particular between the windings in the circumferential direction of the rotor. Thus, for example, in particular in a first step, the winding is arranged on the laminated core and in particular fixed to the laminated core; and then, in particular in a second step, the line element is arranged between the windings, in particular in the circumferential direction of the rotor. Thus, for example, winding or wrapping of the laminated core and / or the line element can be dispensed with when forming or assembling the winding. Thus, the line element can be arranged on the rotor or the laminated core with particularly little effort. Thus, the assembly effort, in particular for producing the rotor, can be kept particularly low.

[0031] The pipe element at least partially, in particular completely, defines at least one cooling channel through which coolant can flow in the axial direction of the rotor, for example completely surrounds the cooling channel in its circumferential direction. As a result, the rotor, in particular the corresponding winding, can be cooled particularly well.

[0032] In another embodiment, it is provided that the pipe element is arranged in a recess of the rotor, the recess of the rotor extends between the windings in the circumferential direction of the rotor, the windings are formed as adjacent, especially directly adjacent windings in the circumferential direction of the rotor, with the help of which, in particular during the operation of the electric machine, the corresponding magnetic poles of the rotor are respectively generated or can be generated. In other words, it is provided in the method that the at least one pipe element formed separately from the windings and separately from the lamination group is at least partially arranged in the recess, the pipe element at least partially, especially completely defines the at least one cooling channel through which the coolant can flow in the axial direction of the rotor, the recess extends between two adjacent windings in the circumferential direction of the rotor among the windings, with the help of which, in particular during the operation of the electric machine, the corresponding magnetic poles of the rotor are respectively generated or can be generated. Therefore, the rotor can be manufactured particularly cheaply. The recess can be, for example, a rotor slot of the rotor, in particular, the recess can be used to arrange or accommodate the pipe element and thus for cooling the winding.

[0033] In another embodiment, it is provided that before the pipe element is arranged between the windings or in the recess in the circumferential direction of the rotor, a component which is separated from the lamination stack and is formed separately from the pipe element is arranged, in particular directly on the lamination stack, and at least one channel through which a coolant can flow extends in the component. In other words, before the pipe element is arranged between the windings or in the recess, the component is arranged on the lamination stack and in particular connected to the lamination stack, wherein the component can be flowed through by a coolant. This means that the arrangement of the component is performed before the arrangement of the pipe element. Preferably, the component is formed separately from the rotor shaft of the rotor. It is preferably provided that the component has at least one connection portion, via which, when the pipe element is arranged between the windings or in the receiving chamber, the cooling channel is connected to the channel extending in the component in a fluid-conducting manner, in particular directly in a fluid-conducting manner. In other words, when the pipe element is arranged, a fluid-conducting connection is achieved between the cooling channel and the channel or the component via the connection portion. Thus, for example, the line element can be arranged particularly easily, in particular axially from the opposite side, on the component, in particular inserted into the component. As a result, the rotor can be produced particularly cost-effectively.

[0034] In another embodiment, it is provided that, in order to arrange the tubular element between the windings or in the recess, the tubular element is arranged on an assembly aid which is formed separately from the rotor, by means of which the tubular element is pushed or arranged between the windings, in particular in the circumferential direction of the rotor, or in the axial direction of the rotor into the recess. In other words, the tubular element arranged on the assembly aid is moved relative to the lamination stack or the winding by means of the assembly aid (that is, by moving the assembly aid relative to the lamination stack or the winding), so that the tubular element, in particular the tubular element initially spaced apart from the rotor, is arranged in the axial direction of the rotor, in particular introduced or pushed into the rotor at the installation position provided for the tubular element. As a result, the rotor can be manufactured particularly cost-effectively and / or reliably.

[0035] In another embodiment, it is provided that in order to arrange the pipeline element between the windings or in the recess, in particular, between the windings or in the recess in the circumferential direction of the rotor, a second assembly aid which is separately formed from the assembly aid is arranged on the outer side of the rotor (the outer side is directed outward in the axial direction of the rotor) - in particular, at least indirectly or directly - on at least one structural element of the rotor or on the rotor. In other words, in order to arrange the pipeline element, in particular, first, the second assembly aid is arranged, in particular, fixed on the structural element. It is preferably provided that the assembly aid is movably held on the second assembly aid in the axial direction of the rotor relative to the second assembly aid, in particular, directly held on the second assembly aid in order to push in the pipeline element. In other words, the assembly aid (which can be referred to as the first assembly aid) held on the second assembly aid moves, in particular, translates, relative to the second assembly aid in the axial direction of the rotor, so that the pipeline element arranged on the first assembly aid is arranged at the installation position of the pipeline element specified in the rotor, that is, between the windings or in the recess. The second assembly aid is provided, for example, for centering on the structural element. The line element can thus be arranged particularly reliably in its installation position. In particular, the line element can be introduced between the windings over its entire length with the aid of the assembly aids. The rotor can thus be manufactured particularly cost-effectively and / or reliably.

[0036] The structural element can be understood in particular as a mechanism or a component or a structural assembly of the rotor. The structural element can be, for example, a lamination stack and / or a star disk. This means that the structural element is, for example, designed as a lamination stack and / or a star disk. For example, the assembly aid can be centered by the inner diameter of the star disk. The lamination stack is used, for example, as a stop, in particular in the axial direction of the rotor. This means that the lamination stack is used, for example, for axial positioning.

[0037] Preferably, the first assembly aid is designed to receive, guide, clamp and lay the pipeline element, in particular in the rotor or at the installation location of the pipeline element. The assembly aid, which can be particularly referred to as the first assembly aid, and the second assembly aid are, for example, parts of an assembly device.

[0038] A third aspect of the invention relates to an assembly device for producing a rotor for an electric machine, in particular the rotor is a rotor according to the first aspect of the invention. Preferably, the assembly device is configured for implementing the method according to the second aspect of the invention. The advantages and advantageous solutions of the first and second aspects can be regarded as advantages and advantageous solutions of the third aspect of the invention, and vice versa. The assembly device can be particularly referred to as a joining device.

[0039] The assembly device has a first assembly aid having at least one receiving area. At least one pipe element is arranged or can be arranged on the receiving area, and the pipe element at least partially, in particular completely, defines at least one cooling channel through which a coolant can flow, for example completely surrounds the cooling channel in the circumferential direction of the cooling channel. In other words, the receiving area is provided for receiving or arranging the pipe element. For example, the pipe element can be fixed on the receiving area.

[0040] The assembly device has a second assembly aid that is configured separately from the first assembly aid, and the second assembly aid has at least one fixing area, through which the second assembly aid is held or can be held on at least one structural element of the rotor, in particular a star disk and / or a lamination stack, on the outer side of the rotor (the outer side points outward in the axial direction of the rotor) - in particular at least indirectly or directly. In other words, the second assembly aid is fixed or can be fixed to the structural element via the fixing area, in particular at least indirectly or directly. In other words again, the second assembly aid is held or can be held on the rotor via the fixing area on the outer side of the rotor (the outer side points outward in the axial direction of the rotor) - in particular at least indirectly or directly.

[0041] The assembly device has at least one coupling device, by which the first assembly aid can be moved in the axial direction of the rotor relative to the second assembly aid (the second assembly aid is held or can be held on a structural element or a rotor, in particular at least indirectly or directly) so that: in particular, by the movement of the first assembly aid, the pipe element arranged on the first assembly aid is arranged in the circumferential direction of the rotor between two windings of the rotor, the two windings being formed separately from each other, held on the lamination stack and spaced apart from each other in the circumferential direction of the rotor. In other words, the respective assembly aids are coupled or can be coupled relative to each other by the coupling device so that when the second assembly aid is held on the structural element or the rotor, the pipe element arranged, in particular directly arranged on the first assembly aid can be moved in the axial direction of the rotor relative to the second assembly aid, so that it can be achieved that the pipe element is arranged at its prescribed installation position in the rotor, in particular between the windings in the circumferential direction. Therefore, the rotor can be manufactured particularly cost-effectively and / or reliably.

[0042] Further features of the invention are derived from the claims, the drawings and the description of the drawings. Features and feature combinations mentioned above in the description and features and feature combinations mentioned below in the description of the drawings and / or shown individually in the drawings can be used not only in the respectively described combination but also in other combinations or individually. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will now be explained in more detail with the aid of preferred embodiments and with reference to the accompanying drawings. The accompanying drawings are as follows:

[0044] Figure 1 A schematic perspective view showing a rotor according to the invention; and

[0045] Figure 2 A schematic and perspective partial view of a rotor according to the invention; and

[0046] Figure 3 A schematic partial sectional view of a rotor according to the invention is shown in a first section; and

[0047] Figure 4 A schematic partial sectional view of a rotor according to the invention is shown in a second section; and

[0048] Figure 5 shows a schematic diagram for describing the method according to the invention for producing a rotor according to the invention; and

[0049] Figure 6 A schematic perspective view showing a first assembly aid of the assembly device according to the invention; and

[0050] Figure 7 show Figure 6 a schematic perspective view of a first assembly aid, on which the piping element of the rotor according to the invention is arranged; and

[0051] Figure 8 A schematic perspective view showing a second assembly aid of the assembly device according to the invention and a rotor according to the invention; and

[0052] Fig. 9 A schematic perspective view showing an assembly device according to the invention, which is arranged on a structural element of a rotor according to the invention; and

[0053] Fig.10 A schematic and perspective partial view of a rotor according to the invention is shown in order to illustrate the introduction aid; and

[0054] Fig.11 Display for description Fig.10 Detailed diagram of a schematic illustration of an introduction aid.

[0055] In the figures, identical or functionally identical elements are provided with the same reference symbols. DETAILED DESCRIPTION

[0056] Figure 1 The schematic perspective view shows a rotor 1 for an electric machine, in particular for a motor vehicle. The electric machine is provided, for example, for driving the motor vehicle, so that the electric machine can be referred to as a traction motor in particular. Figure 2 The rotor 1 is shown in a schematic and perspective partial view, in which two sections 2 , 3 , which are in particular different from one another, are depicted. Figure 3 The rotor 1 is shown in a schematic partial sectional view. Figure 3 A cross-sectional view through a first cross-section 2 among the cross-sections is shown in FIG.

[0057] The rotor 1 has at least one laminated core 4, on which a plurality of separately formed windings 5, 6, in particular at least two windings 5, 6 of the rotor 1 are held, for example directly held. In the exemplary embodiment, six separately formed windings 5 ​​to 10 are provided, which are held on the laminated core 4, in particular at least directly or indirectly held on the laminated core. The windings 5 ​​to 10 are arranged, for example, distributed, in particular uniformly distributed, on the rotor 1 or the laminated core 4 in a circumferential direction 11 of the rotor 1.

[0058] In order to be able to cool the rotor 1 particularly well and to manufacture the rotor particularly cost-effectively, it is provided that the rotor 1 has at least one pipe element 12 which is designed separately from the windings 5 ​​to 10 and separately from the laminated core 4. In the exemplary embodiment, the rotor 1 has three pipe elements 12 to 14, for example. The respective pipe elements 12 to 14 respectively at least partially, in particular completely, define at least one respective cooling channel 16 through which a coolant can flow in the axial direction 15 of the rotor 1. The respective pipe elements 12 to 14 are respectively arranged at least partially in respective recesses 17 to 22, which respectively extend between two respective windings 5 ​​to 10 which are adjacent, in particular directly adjacent, in the circumferential direction 11 of the rotor 1, by means of which respective magnetic poles 23 to 28 of the rotor 1 are respectively generated or can be generated, in particular during operation of the electric machine. Thus, for example, the first tubular element 12 among the tubular elements is at least partially arranged in the first recess 17 among the recesses, the first recess extending between the first winding 5 among the windings and the second winding 6 among the windings, the windings 5, 6 being adjacent to each other, in particular directly adjacent to each other in the circumferential direction 11 of the rotor 1, and the first magnetic pole 23 among the magnetic poles of the rotor 1 is generated or can be generated by means of the first winding 5, and the second magnetic pole 24 among the magnetic poles of the rotor 1 that is different from the first magnetic pole 23 is generated or can be generated by means of the second winding 6. Preferably, the respective tubular elements 12-14 are respectively at least partially arranged in at least two respective recesses among the recesses 17-22. Thus, for example, the first tubular element 12 is at least partially arranged in a first recess 17 and at least partially arranged in a second recess 18 among the recesses, which extends between the second winding 6 and a third winding 7 among the windings, preferably, the windings 6, 7 are adjacent to each other in the circumferential direction 11 of the rotor 1, in particular directly adjacent to each other.

[0059] For example, the third magnetic pole 25 among the magnetic poles of the rotor 1 can be generated by means of the third winding 7 among the windings. For example, the fourth magnetic pole 26 among the magnetic poles of the rotor 1 can be generated by means of the fourth winding 8 among the windings. For example, the fifth magnetic pole 27 among the magnetic poles of the rotor 1 can be generated by means of the fifth winding 9 among the windings. For example, the sixth magnetic pole 28 among the magnetic poles of the rotor 1 can be generated by means of the sixth winding 10 among the windings. Preferably, the corresponding magnetic poles 23 to 28 are respectively different from each other. For example, the second and third windings 6 and 7 are adjacent to each other in the circumferential direction 11 of the rotor 1, especially directly adjacent. For example, the third and fourth windings 7 and 8 are adjacent to each other in the circumferential direction 11 of the rotor 1, especially directly adjacent. For example, the fourth and fifth windings 8 and 9 are adjacent to each other in the circumferential direction 11 of the rotor 1, especially directly adjacent. For example, the fifth and sixth windings 9 and 10 are adjacent to each other in the circumferential direction 11 of the rotor 1, especially directly adjacent. For example, the first and the sixth winding 5 , 10 are adjacent, in particular directly adjacent, in a circumferential direction 11 of the rotor 1 .

[0060] In general, it can be seen that at least two windings, in particular three windings, of the windings 5 ​​to 10 can be cooled, preferably directly cooled, by means of the first pipe element 12. For example, each winding of the respective windings 5 ​​to 10 can be completely cooled by a respective pipe element 12 to 14 by surrounding the respective magnetic poles 23 to 28. For example, each two windings of the respective windings 5 ​​to 10 can be cooled in half by a respective pipe element 12 to 14. This means that, for example, six windings 5 ​​to 10 can be cooled, in particular directly cooled, by means of three pipe elements 12 to 14. Therefore, particularly effective cooling of the rotor 1, in particular particularly effective cooling of the windings 5 ​​to 10, can be achieved. Preferably, the recesses 17 to 22 or the magnetic poles 23 to 28 are distributed, in particular evenly distributed, in the circumferential direction of the rotor 1.

[0061] In a further embodiment, it is provided that the rotor 1 has a rotor shaft 29 which is formed separately from the windings 5 ​​to 10 and separately from the laminated core 4, the laminated core 4 which is connected to the rotor shaft 29 in a rotationally fixed manner, in particular directly connected, is arranged on the rotor shaft, and a coolant channel 30 through which a coolant can flow extends in the rotor shaft 29. In a further embodiment, at least one channel 32 is provided, through which a coolant can flow and which at least partially extends in a component 31 which is formed separately from the rotor shaft 29 and the laminated core 4 and separately from the corresponding line elements 12 to 14, through which the coolant channel 30 extending in the rotor shaft 29 is connected in a fluid-conducting manner, in particular directly in a fluid-conducting manner, to the corresponding cooling channel 16. Preferably, three of the channels 32 are provided in the component 31, through which each of the cooling channels 16 is connected in a fluid-conducting manner, in particular directly in a fluid-conducting manner, to the coolant channel 30.

[0062] It is preferably provided that the coolant flowing through the coolant channel 30 extending in the rotor shaft 29 can be discharged from the coolant channel 30 via a corresponding channel 32 extending in the component 31 and can be introduced into the corresponding cooling channel 16 .

[0063] Figure 4 The rotor 1 is shown in a schematic partial sectional view, in which a sectional view through a second section 3 among the sections is shown. It is preferably provided that at least one second channel 33 through which coolant can flow and which is spaced apart from the channel 32 or the corresponding channel 32 extends in the component 31, and the coolant flowing through the corresponding cooling channel 16 can be discharged from the corresponding pipe elements 12 to 14 through the second channel. For example, three second channels 33 are arranged in the component 31, and the coolant flowing through the corresponding cooling channel 16 can be discharged from the corresponding pipe elements 12 to 14 through the second channels.

[0064] In a further embodiment, it is provided that the first line element 12 has a first length region 34, which at least partially, in particular completely, delimits the cooling channel 16 and is arranged in the first recess 17. Preferably, the first line element 12 has a second length region 35, which is at least indirectly, in particular directly connected to the first length region 34, which at least partially, in particular completely delimits a second cooling channel 36 and is arranged in the second recess 18, wherein the second cooling channel can be traversed by coolant in the axial direction 15 of the rotor 1 and is connected in a flow-conducting manner to the cooling channel 16 of the first line element 12. Thus, the respective cooling channels 15, 16 are surrounded by the first line element 12, for example.

[0065] For example, the second piping element 13 has a first length region, which at least partially defines a cooling channel of the second piping element 13 and is arranged in the third recess 19, in particular completely surrounds the cooling channel in the circumferential direction of the cooling channel. For example, the second piping element 13 has a second length region which is at least indirectly connected to the first length region of the second piping element, which second length region at least partially defines a second cooling channel and is arranged in the fourth recess 20, in particular completely surrounds the second cooling channel in the circumferential direction 11 of the second cooling channel, wherein the second cooling channel can be traversed by coolant in the axial direction of the rotor 1 and is connected to the cooling channel of the second piping element in a fluid-conducting manner.

[0066] For example, the third piping element 14 has a first length region which at least partially defines the cooling channel of the third piping element 14 and is arranged in the fifth recess 21, in particular completely surrounds the cooling channel in the underbody protection of the cooling channel. For example, the third piping element 14 has a second length region which is at least indirectly connected to the first length region of the third piping element 14, which at least partially defines a second cooling channel and is arranged in the sixth recess 22, in particular completely surrounds the second cooling channel in the circumferential direction of the second cooling channel, the second cooling channel being flowable by coolant in the axial direction 15 of the rotor 1 and being connected to the cooling channel of the third piping element in a flow-conducting manner.

[0067] It can thus be seen overall that the first tubular element 12 extends at least partially in the first and second recesses 17, 18. For example, the second tubular element 13 extends at least partially in the third and fourth recesses 19, 20. For example, the third tubular element 14 extends at least partially in the fifth or sixth recess 21, 22. In other words, for example, the first tubular element 12 is at least partially arranged in the first and second recesses 17, 18, and / or the second tubular element 13 is at least partially arranged in the third and fourth recesses 19, 20, and / or the third tubular element 14 is at least partially arranged in the fifth and sixth recesses 21, 22.

[0068] Preferably, the coolant flowing through the respective line elements 12 - 14 , in particular through the respective cooling channel 16 and / or the respective cooling channel 36 , can be discharged from the respective line elements 12 - 14 via the respective second channel 33 , in particular into the environment of the rotor 1 .

[0069] The respective flow directions of the coolant flowing through the coolant channel 30, the respective channels 32, 33 and the respective cooling channels 16, 36 are Figure 3 and Figure 4 This is described with the aid of arrow 37.

[0070] For example, the component 31 is formed as a part of a star disk 76 of the rotor 1. Thus, for example, the star disk 76 has a base body 38 and a component 31 that is formed separately from the base body 38 and connected to the base body 38. For example, the rotor 1 has at least one insulating element 39, in particular referred to as an insulator, which is provided to insulate the star disk 76, in particular the base body 38, from the respective windings 5 ​​to 10. For example, the rotor 1 has at least one second insulating element 40, in particular formed separately from the insulating element 39, which is provided to insulate the component 31 from the respective windings 5 ​​to 10.

[0071] For example, the respective piping elements 12-14 and the component 31 are sealed by means of at least one respective sealing element 41, in particular sealed from the environment of the respective piping elements 12-14 and the component 31 or sealed from each other. For example, the component 31 has respective connection locations 42-44, via which the respective piping elements 12-14, in particular the respective first length regions 34 of the respective piping elements 12-14 are fluidically connected. For example, the respective sealing element 41 is arranged in the region of the respective connection locations 42-44, in particular directly on the respective connection locations 42-44. For example, the respective second length regions 35 of the respective piping elements 12-14, in particular the respective second cooling channels 36, are fluidically connected, in particular directly, to the respective second channels 33 via respective second connection locations 45-47 of the component 31. For example, in the region of the respective second connection locations 45-47, in particular directly on the respective second connection locations 45-47, respective second sealing elements 48 are provided, by means of which the respective second length regions 35 of the respective line elements 12-14 and the component 31 are sealed, in particular from the environment or from each other. The respective sealing elements 41, 48 are designed, for example, as sealing rings, in particular also as O-rings.

[0072] Figure 5 A schematic diagram is shown for describing a method for manufacturing a rotor 1. Figure 5 1 shows a plurality of schematic perspective views of a rotor 1. For example, in a first step A, the windings 5 ​​to 10 are arranged on the lamination stack 4, in particular at least indirectly or directly on the lamination stack, and in particular connected to the lamination stack 4. In other words, for example, in a first step A, the lamination stack 4 is wound. Thus, for example, after the first step A, a wound lamination stack 4 is present.

[0073] For example, in a second step B, in particular the second step B is carried out after the first step A, the component 31 is arranged, in particular at least indirectly or directly, on the lamination stack 4 or the star disk 76, in particular on a part of the star disk 76, and in particular connected to the star disk 76, in particular connected to a part of the star disk 76. The second step B can be understood in particular as the joining of the component 31, which can in particular be referred to as a pipeline body. For example, the component 31 is designed as a part of the star disk 76 or as a part of a multi-part star disk structure.

[0074] In a third step C, in particular, the third step C is performed after the second step B, for example, the corresponding tubular elements 12-14, in particular the corresponding length regions 34, 35 of the corresponding tubular elements 12-14 are arranged between two corresponding windings among the windings 5-10 held on the lamination stack 4 of the rotor 1 in the circumferential direction 11 of the rotor 1. Here, the corresponding tubular elements 12-14, in particular the corresponding length regions 34, 35 of the corresponding tubular elements 12-14 are arranged in the corresponding recesses 17-22. Thus. For example, the first length region 34 of the first tubular element 12 is arranged between the first and second windings 5, 6, in particular in the first recess 17. For example, the second length region 35 of the first tubular element 12 is arranged between the second and third windings 6, 7, in particular in the second recess 18. For example, the first length region 34 of the second tubular element 13 is arranged between the third and fourth windings 7, 8, in particular in the third recess 19. For example, the second length region 35 of the second tubular element 13 is arranged between the fourth and fifth windings 8, 9, in particular in the fourth recess 20. For example, the first length region 34 of the third tubular element 14 is arranged between the fifth and sixth windings 9, 10, in particular in the fifth recess 21. For example, the second length region 35 of the third tubular element 14 is arranged between the first and sixth windings 5, 10, in particular in the sixth recess 22.

[0075] Thus, it can be seen overall that the component 31 is arranged, in particular at least indirectly or directly, on the star disk 76, in particular on the star disk part, for example, before the respective line elements 12-14 are arranged between the respective windings 5-10 in the circumferential direction 11 of the rotor 1. Preferably, the respective channels 32, 33 are connected to the respective cooling channels 16, 36 of the respective line elements 12-14 in a fluid-conducting manner via the respective connection points 42-47.

[0076] In a fourth step D, which is carried out in particular after the third step C, for example, the rotor shaft 29 is assembled. This means that the rotor shaft 29 is arranged on the laminated core 4 and in particular is connected to the laminated core 4 .

[0077] In the fifth step E, in particular the fifth step E is performed after the fourth step D, the corresponding recesses 17 to 22 are covered, for example, with corresponding covering elements 49, which can be referred to as groove covers in particular. Therefore, the fifth step E can be understood in particular as the joining of the groove covers.

[0078] In a sixth step F, in particular, the sixth step F is carried out after the fifth step E, end caps 50, 51 are arranged on the lamination stack 4, in particular at both ends with reference to the axial direction 15. Therefore, the sixth step F can be referred to as a joining of the end caps 50, 51. For example, a first end cap 50 of the end caps is arranged on the lamination stack 4 on an outer side 53 of the rotor 1, which outer side points outward in a first direction 52 in the axial direction 15 of the rotor 1.

[0079] For example, the second end cap 51 of the end caps is arranged on the lamination stack 4 on a second outer side 55 of the rotor 1, which second outer side points outward in a second direction 54 opposite to the first direction 52 in the axial direction 15 of the rotor 1. In addition, in a sixth step F, for example, a plurality of cavities are cast. The outer side 53 can be particularly referred to as the first outer side. For example, the component 31 is arranged on the first outer side 53.

[0080] Figure 6 A schematic perspective view of a first assembly aid 56 of an assembly device 57 for producing a rotor 1, in particular for assembling corresponding line elements 12 to 14. The first assembly aid 56 has at least one receiving area 58, on which a corresponding line element 12 to 14, in particular one of the line elements 12 to 14, is arranged or can be arranged. For example, the assembly device 57 has a plurality of, in particular three, first assembly aids 56, 59, 60.

[0081] Figure 7 The schematic perspective view shows a first assembly aid 56 in which the first line element 12 is arranged in a receiving region 58 . Figure 8In the schematic perspective view, a second assembly aid 61 of the assembly device 57, which is designed separately from the first assembly aid 56 or the first assembly aid 56, 59, 60, and a rotor 1 are shown. The second assembly aid 61 has at least one fixing area 62, by which the second assembly aid 61 is held or can be held, in particular at least indirectly or directly held or can be held on a structural element 77 of the rotor 1 or on the rotor 1 on the second outer side 55 of the rotor 1, which second outer side points outward in the axial direction 15 of the rotor 1. The fixing area 62 is designed, for example, as a centering handle, which can be received or arranged in a receiving area 63 of the rotor 1 provided for the rotor shaft 29. For example, the structural element 77 is a star disk 78 and / or a lamination stack 4. The star disks 76, 78 are designed, for example, separately from each other. The star disk 76 can be called, in particular, the first star disk 76. The star disk 78 can be called, in particular, the second star disk 78.

[0082] Fig. 9 A plurality of schematic perspective views of an assembly device 57 are shown, wherein the corresponding pipe elements 12 to 14 are arranged on the corresponding first assembly aid 56, and the assembly device 57 is held on the rotor 1, in particular on the structural element 77, by means of a second assembly aid 61. The assembly device 57 has at least one coupling device 64. In an embodiment, the assembly device has three coupling devices 64 to 66. By means of the corresponding coupling devices 64 to 66, the corresponding assembly aids 56, 59, 60 can be moved in the axial direction 15 of the rotor 1 relative to the second assembly aid 61 (which is held, in particular at least indirectly or directly, on the structural element 77 or the rotor 1) so that: in particular by moving the corresponding first assembly aid 56, 59, 60, the corresponding pipe elements 12 to 14 arranged on the corresponding first assembly aid 56, 59, 60 are arranged between the corresponding windings 5 ​​to 10 in the circumferential direction 11 of the rotor 1, in particular in the corresponding recesses 17 to 22.

[0083] exist Fig. 9 In the first perspective view among the perspective views in FIG. 5 , the respective first assembly aid 56 , 59 , 60 is in a first position G, in particular in a first position relative to the second assembly aid 61 . Fig. 9 In the second perspective view among the perspective views shown in , the respective first assembly aids 56, 59, 60 are in a second position H different from the first position G. Preferably, the respective first assembly aids 56, 59, 60 are moved from the first position G to the second position H for arranging or assembling the respective pipe elements 12-14, in particular for arranging or assembling the respective pipe elements in the respective recesses 17-22.

[0084] Thus, in particular in the third step C, for example, in particular in order to arrange the corresponding line elements 12-14 on the rotor 1, the second assembly aid 61 is arranged, in particular at least indirectly or directly arranged on the structural element 77 of the rotor 1 or the rotor 1, and in particular connected, for example at least indirectly or directly connected, to the structural element 77 or the rotor 1. Here, for example, the centering of the second assembly aid 61 can be achieved by means of a centering handle. For example, the second assembly aid 61 has a spacer 67 in order to clearly arrange or position the second shaft 61 on the structural element 77 or the rotor 1 in the axial direction 15 of the rotor 1. For example, in particular subsequently, in order to arrange the corresponding line elements 12-14 between the corresponding windings 5-10, in particular in the corresponding recesses 17-22, the corresponding line elements 12-14 are arranged on the corresponding first assembly aid 56, 59, 60, in particular in the corresponding receiving area 58. This can be referred to in particular as the installation of the corresponding line elements 12-14 into the corresponding first assembly aid 56, 59, 60. For example, the respective receiving area 58 has at least one clamping device 68, which is configured to fix, in particular clamp, the respective pipeline element 12-14 on the respective receiving area 58. The respective clamping device 68 is configured, for example, as a respective guide arm. In an embodiment, the respective first assembly aid 56, 59, 60 has, for example, two of the guide arms. For example, the respective guide arms are configured in a half-shell structure.

[0085] For example, in particular, immediately afterwards, the corresponding first assembly aids 56, 59, 60 provided with the corresponding pipeline elements 12~14 are arranged on the second assembly aid 61, for example, mounted on the second assembly aid 61, that is, coupled with the second assembly aid 61 through the corresponding coupling devices 64~66. For example, the corresponding coupling devices 64, 66 respectively have two coupling elements 69, 70. The first coupling element 69 among the corresponding coupling elements is preferably a component of the corresponding first assembly aid 56, 59, 60. The corresponding second coupling element 70 is preferably a component of the second assembly aid 61. The corresponding first coupling element 69 and the corresponding second coupling element 70 are preferably configured to correspond to each other. For example, the corresponding first assembly aids 56, 59, 60 are movably held on the second assembly aid 61 relative to the second assembly aid 61 in a guide rail-guided manner. Thus, for example, one of the coupling elements 69, 70, for example the first coupling element 69, is configured as a guide element, and the other of the coupling elements 69, 70, in particular the second coupling element 70, is configured as a receiving element, in particular a receiving element configured corresponding to the guide element, the receiving element being configured to receive the guide element. Therefore, the corresponding first assembly aid 56, 59, 60 can be understood in particular as a slide guided by a guide rail. The guide element can be referred to in particular as a slide guide. Therefore, the assembly device 57 can have at least one slide system. In general, it can be seen that the slide system is configured to receive and guide the corresponding pipeline elements 12~14.

[0086] For example, in particular immediately thereafter, the respective first assembly aid 56, 59, 60 is moved relative to the second assembly aid 61, so that the respective line element 12-14 arranged on the respective first assembly aid 56, 59, 60 is arranged on the rotor 1, in particular pushed into the rotor 1, for example into the respective recess 17-22. In order to enable the pushing in to be carried out particularly cost-effectively, the respective first assembly aid 56, 59, 60 has, for example, at least one introduction stage 71.

[0087] The respective line elements 12 to 14, in particular the respective length regions 34, 35 of the respective line elements 12 to 14, are arranged in the respective receiving chambers of the component 31, for example, at the respective connection locations 42 to 47, and are thus connected to the component 31, in particular directly connected, in particular pressed into the component 31. The slide system can thus be designed for pressing the respective line elements 12 to 14. In order to be able to realize such an arrangement, in particular such a pressing, with particularly low effort, at least one respective introduction aid 72, in particular an introduction bevel, is arranged at the respective connection locations 42 to 47, in particular in the respective receiving chambers, the introduction aid being designed, for example, as an introduction funnel. Fig.10The rotor 1 is shown in a schematic and perspective partial view, in which the introduction aid 72 is shown. Fig.11 show Fig.10 , in particular the schematic partial view shows the introduction aid 72 .

[0088] If the corresponding pipeline element 12-14 is in its prescribed installation position in the rotor 1, the corresponding first assembly aid 56, 59, 60 is removed from the rotor 1. At this time, the corresponding pipeline element 12-14 arranged on the corresponding first assembly aid 56, 59, 60 is ejected or removed from the corresponding first assembly aid 56, 59, 60, for example, by means of an ejection device 73. This means that the corresponding first assembly aid 56, 59, 60 can be removed from the rotor 1, in particular from the structural element 77, or from the corresponding pipeline element 12-14 by means of the ejection device 73. For example, the corresponding ejection device 73 has a corresponding ejection element 74, which can pass through a through opening 75 of the ejection device 73, in particular, called an ejection through-portion, in order to eject the corresponding pipeline element 12-14, that is, in particular, by mechanical contact, to separate the corresponding pipeline element from the corresponding receiving area 58 or remove it from the corresponding receiving area. Therefore, the corresponding first assembly aid 56, 59, 60 has a corresponding through opening 75. The carriage system can thus be designed for laying corresponding piping elements 12 - 14 .

[0089] exist Fig. 9 In the third perspective view among the perspective views shown in , the respective first assembly aids 56 , 59 , 60 are in a third position I different from the positions G, H. For example, the respective first assembly aids 56 , 59 , 60 are moved from the second position H to the third position I, in particular relative to the second assembly aids 61, after laying or removing the respective piping elements 12 - 14 , that is, after assembling the respective piping elements 12 - 14 . Reference numerals list

[0090] 1 rotor

[0091] 2 First section

[0092] 3 Second section

[0093] 4 stacking groups

[0094] 5First winding

[0095] 6 Second winding

[0096] 7Third winding

[0097] 8Fourth winding

[0098] 9Fifth winding

[0099] 10 Sixth winding

[0100] 11 Circumferential direction

[0101] 12. First pipeline element

[0102] 13 Second pipeline element

[0103] 14Third pipeline component

[0104] 15 Axial direction

[0105] 16 cooling channels

[0106] 17 first recess

[0107] 18 second recess

[0108] 19 third recess

[0109] 20Fourth recess

[0110] 21Fifth recess

[0111] 22 Sixth recess

[0112] 23 First Pole

[0113] 24 Second magnetic pole

[0114] 25 Third Pole

[0115] 26 Fourth Pole

[0116] 27 The Fifth Pole

[0117] 28 The Sixth Magnetic Pole

[0118] 29 rotor shaft

[0119] 30 coolant channels

[0120] 31 components

[0121] 32 First Channel

[0122] 33 Second channel

[0123] 34 First length area

[0124] 35 Second length area

[0125] 36 Second cooling channel

[0126] 37 Arrows

[0127] 38 Matrix

[0128] 39 Insulation elements

[0129] 40 second insulating element

[0130] 41 first sealing element

[0131] 42Connection

[0132] 43 Connection parts

[0133] 44Connection

[0134] 45 Second connection part

[0135] 46 Second connection part

[0136] 47 Second connection part

[0137] 48 second sealing element

[0138] 49 Covering element

[0139] 50 first end cap

[0140] 51 Second end cap

[0141] 52 First Direction

[0142] 53 First outer side

[0143] 54 Second Direction

[0144] 55 second outer side

[0145] 56First assembly auxiliary device

[0146] 57 Assembly device

[0147] 58 Reception area

[0148] 59First assembly auxiliary device

[0149] 60First assembly auxiliary device

[0150] 61 Second assembly auxiliary device

[0151] 62 fixed area

[0152] 63 Reception area

[0153] 64 first coupling device

[0154] 65 Second coupling device

[0155] 66 Third coupling device

[0156] 67 Spacer

[0157] 68 Clamping device

[0158] 69 first coupling element

[0159] 70 second coupling element

[0160] 71Introduction phase

[0161] 72 Import Helper

[0162] 73 ejector device

[0163] 74 ejector components

[0164] 75 through opening

[0165] 76 star-shaped disk

[0166] 77 Structural elements

[0167] 78 star-shaped plate

[0168] AFirst Step

[0169] B. Second Step

[0170] CThird step

[0171] D Step 4

[0172] EThe fifth step

[0173] Step 6

[0174] GFirst Position

[0175] H Second Position

[0176] IThird Position

Claims

1. A rotor (1) for an electric machine, comprising a laminated core (4), a plurality of windings (5, 6) of the rotor (1) being arranged separately from one another and being held on the laminated core, characterized in that: At least one pipe element (12) which is separate from the windings (5, 6) and separate from the laminated core (4) is at least partially arranged in a recess (17), the pipe element at least partially defining at least one cooling channel (16) through which a coolant can flow in an axial direction (15) of the rotor (1), the recess extending between two adjacent windings in the circumferential direction (11) of the rotor (1) of the windings (5, 6), by means of which corresponding magnetic poles (23, 24) of the rotor (1) can be generated.

2. The rotor (1) according to claim 1, characterized in that - a rotor shaft (29) which is designed separately from the windings (5, 6) and separately from the lamination stack (4), on which the lamination stack (4) connected to the rotor shaft (29) in a rotationally fixed manner is arranged, and in which a coolant channel (30) through which a coolant can flow extends; and - a channel (32) through which a coolant can flow and which at least partially extends in a component (31), which is designed separately from the rotor shaft (29), the laminated core (4) and the line element (12), and via which a coolant channel (30) extending in the rotor shaft (29) is fluidically connected to the cooling channel (16).

3. The rotor (1) according to claim 2, characterized in that - the coolant flowing through the coolant channel (30) extending in the rotor shaft (29) can be discharged from the coolant channel (30) via a channel (32) extending in the component (31) and can be introduced into the cooling channel (16); and A second channel (33) through which coolant can flow and which is spaced apart from the channel (32) extends in the component (31), and via which the coolant flowing through the cooling channel (16) can be discharged from the line element (12).

4. A rotor (1) according to any one of the preceding claims, characterised in that - the pipe element (12) has a first length region (34) which at least partially defines the cooling channel (16) and is arranged in the recess (17), the recess extending in the circumferential direction (11) of the rotor (1) between a first winding (5) among the windings and a second winding (6) among the windings, by means of which a first magnetic pole (23) among the magnetic poles can be generated, the second winding being adjacent to the first winding (5) in the circumferential direction (11) of the rotor (1), by means of which a second magnetic pole (24) among the magnetic poles which is different from the first magnetic pole (23) can be generated; and - The pipe element (12) has a second length region (35) at least indirectly connected to the first length region (34), the second length region at least partially defining a second cooling channel (36), the second cooling channel being flowable by coolant in the axial direction (15) of the rotor (1) and being connected to the cooling channel (16) in a fluid-conducting manner, and the second length region being arranged in a second recess (18), the second recess being spaced apart from the recess (17) in the circumferential direction (11) of the rotor (1), the second recess extending in the circumferential direction (11) of the rotor (1) between the second winding (6) and a third winding (7) among the windings, the third winding being adjacent to the second winding (6) in the circumferential direction (11), by means of which a third magnetic pole (25) of the rotor (1) different from the magnetic poles (23, 24) can be generated.

5. A method for producing a rotor (1) for an electric machine, the rotor having a laminated core (4), characterized in that: At least one pipe element (12) is arranged in the circumferential direction (11) of the rotor (1) between two windings (5, 6) which are designed separately from each other and held on a laminated core (4) of the rotor (1), the pipe element being designed separately from the windings (5, 6) and separately from the laminated core (4) and at least partially defining at least one cooling channel (16) through which a coolant can flow in the axial direction (15) of the rotor (1).

6. The method according to claim 5, characterized in that The pipe element (12) is arranged in a recess (17) of the rotor (1), which extends in the circumferential direction (11) of the rotor (1) between windings (5, 6), which are designed as windings (5, 6) adjacent in the circumferential direction (11) of the rotor (1), by means of which corresponding magnetic poles (23, 24) of the rotor (1) can be generated respectively.

7. The method according to claim 5 or 6, characterized in that: Before the piping element (12) is arranged between the windings (5, 6) in the circumferential direction (11) of the rotor (1), a component (31) which is separate from the laminated core (4) and is formed separately from the piping element (12) is arranged on the laminated core (4), at least one channel (32) through which a coolant can flow extends in the component, the component (31) having at least one connection point (42) via which the cooling channel (16) is fluidically connected to the channel (32) extending in the component (31) when the piping element (12) is arranged between the windings (5, 6).

8. The method according to any one of claims 5 to 7, characterized in that In order to arrange the tubular element (12) between the windings (5, 6), the tubular element (12) is arranged on an assembly aid (56), with the aid of which the tubular element (12) is pushed in the axial direction (15) of the rotor (1) and in the circumferential direction (11) of the rotor (1) between the windings (5, 6).

9. The method according to claim 8, characterized in that In order to arrange the pipeline element (12) between the windings (5, 6), a second assembly aid (61) which is constructed separately from the assembly aid (56) is arranged on the outer side (55) of the rotor (1) on a structural element (77) of the rotor (1), the outer side pointing outward in the axial direction (15) of the rotor (1), and the assembly aid (56) is held on the second assembly aid (61) movably in the axial direction (15) of the rotor (1) relative to the second assembly aid (61) in order to push in the pipeline element (12).

10. An assembly device (57) for manufacturing a rotor (1) for an electric machine, the assembly device comprising a first assembly aid (56), the first assembly aid having at least one receiving area (58), on which at least one pipe element (12) can be arranged, the pipe element at least partially defining at least one cooling channel (16) through which a coolant can flow; and the assembly device comprising a second assembly aid (61) configured separately from the first assembly aid (56), the second assembly aid having at least one fixing area (62), by which the second assembly aid (61) can be held on the outer side (55) of the rotor (1) by the fixing area. ) on a structural element (77), the outer side pointing outward in the axial direction (15) of the rotor (1), the assembly device (57) having a coupling device (64), by which the first assembly aid (56) can be moved in the axial direction (15) of the rotor (1) relative to a second assembly aid (61) held on the structural element (77), so as to arrange a pipeline element (12) arranged on the first assembly aid (56) in the circumferential direction (11) of the rotor (1) between two windings (5, 6) of the rotor (1), the two windings being constructed separately from each other, held on the lamination stack (4) and spaced apart from each other in the circumferential direction (11) of the rotor (1).

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