Receiving system for device for receiving unit, first receiving unit for receiving system, second receiving unit for receiving system, and device for receiving unit

Abstract

The invention relates to a receiving system for a device for receiving a unit, a first receiving unit for a receiving system, a second receiving unit for a receiving system, and a device for receiving a unit. The unit is supported on a frame of the device in a manner that the unit can rotate around a rotation axis in a receiving state. The second connecting section of the second receiving unit has an at least sectionally circumferential and radially outwardly directed contact surface which is configured such that it forms an interference fit with an at least sectionally circumferential and radially inwardly directed contact surface of the second connecting section of the first receiving unit in the connected state. In this way, at least one section of the second connecting section of the first receiving unit (11) is deformed radially outward in such a way that the first receiving unit (11) is connected to the second connecting section. The contact surface of the second connecting section of the first receiving unit, which is directed at least in sections and radially outward, and the contact surface of the section of the device, which is directed at least in sections and radially inward, are connected to each other in a force-fitting manner.

Description

Technical Field

[0001] This invention relates to a receiving system for a device for receiving units, particularly a receiving system for a test bench for testing the rotor of an electric drive; a first receiving unit for the receiving system; a second receiving unit for the receiving system; and a device for receiving units, particularly a test bench for testing the rotor of an electric drive. Receiving systems for devices for receiving units, particularly receiving systems for a test bench for testing the rotor of an electric drive, are known in the prior art. Background Technology

[0002] Generally speaking, in the receiving system of the equipment used to receive the unit, especially in the receiving system of the test bench used to test the rotor of the electric drive, it is desirable that in order to receive the unit, the unit, especially the rotor for testing, can be loaded into the equipment particularly easily, especially into the test bench, and that the unit, especially the rotor, can be centered particularly accurately in the equipment, especially in the test bench, in the loaded state. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide an apparatus in which a unit can be particularly easily installed in order to be received, and in which the unit is particularly accurately centered in the apparatus when installed. In particular, the object of the present invention is to provide a test bench in which a rotor can be particularly easily installed in order to test a rotor, and in which the rotor is particularly accurately centered in the test bench when installed.

[0004] According to a first aspect of the invention, the aforementioned task is solved by a receiving system having the features of claim 1. This receiving system is configured for a device for receiving a unit. In particular, the receiving system is configured for a test bench for testing the rotor of an electric actuator. Preferably, the test bench receives the rotor when testing it. The unit is supported on the frame of the device in a manner rotatable about a rotation axis in the received state. Specifically, during testing (where the rotor is preferably in the received state), the rotor is supported on the frame of the test bench in a manner rotatable about a rotation axis. The receiving system has a first receiving unit and a second receiving unit. The first receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. The second receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. The second connecting section of the first receiving unit has at least a segmented, radially outwardly pointing abutment surface, which is configured such that, in the inserted state, it forms a clearance fit with at least a segmented, radially inwardly pointing abutment surface of a section of the device (especially a test bench). The second connecting section of the second receiving unit has at least a segmented, radially outwardly pointing abutment surface, which is configured such that, in the connected state, it forms an interference fit with at least a segmented, radially inwardly pointing abutment surface of the second connecting section of the first receiving unit, thereby causing at least one segment of the second connecting section of the first receiving unit to deform radially outward in such a way that the at least segmented, radially outwardly pointing abutment surface of the second connecting section of the first receiving unit is force-lockedly connected to the at least segmented, radially inwardly pointing abutment surface of a section of the device (especially a test bench).

[0005] As described above, the device is configured to receive a unit. The unit, in its received state, is supported on the frame of the device in a manner rotatable about a rotational axis. Preferably, the device is a test bench for testing the rotor of an electric drive. Specifically, the receiving system is therefore configured for a test bench for testing the rotor of an electric drive. Thus, the rotor of the electric drive is a preferred example of the aforementioned unit. Preferably, during testing, the rotor is supported on the frame of the test bench in a manner rotatable about a rotational axis. Preferably, during testing of the rotor of the electric drive, the rotor repeatedly rotates about the rotational axis and is accelerated to its maximum speed, then braked again, which can also be referred to as deceleration. Here, the rotor is preferably subjected to different operating temperatures. The testing of the rotor may preferably last for several hours or days. The test bench may also preferably be referred to as a speed change tester (SCT). Alternatively, the device is preferably a test bench for testing turbine rotors. The features, technical effects, and / or advantages described in connection with the test bench for testing the rotor of the electric drive are also applicable, at least in a similar manner, to the test bench for testing the turbine rotor, thus omitting the corresponding repetitions here. Furthermore, the features, technical effects, and / or advantages described in connection with the rotor of the electric drive are also applicable, at least in a similar manner, to the turbine rotor, thus omitting the corresponding repetitions in this regard. Alternatively, the device is preferably a machine tool, and the unit is a tool that can be accepted by the machine tool. The features, technical effects, and / or advantages described in connection with the test bench for testing the rotor of the electric drive and the test bench for testing the turbine rotor are also applicable, at least in a similar manner, to the machine tool, thus omitting the corresponding repetitions here. The features, technical effects, and / or advantages described in connection with the rotor of the electric drive and the turbine rotor are also applicable, at least in a similar manner, to the tool that can be accepted by the machine tool, thus omitting the corresponding repetitions here.

[0006] As previously described, the receiving system has a first receiving unit and a second receiving unit. Because the receiving system has a first receiving unit and a second receiving unit, it is preferable to ensure that the unit can be rotatably mounted on the frame of the equipment by means of the first receiving unit and the second receiving unit, and in particular, the rotor can be rotatably mounted on the frame of the test bench.

[0007] As previously described, the first receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. Because the surrounding intermediate section of the first receiving unit extends from the first connecting section to the second connecting section, the intermediate section can elastically deform in such a way that, when the intermediate section is in an elastically deformed state (where elastic deformation occurs), the first connecting section and / or the second connecting section are offset in the axial direction compared to when the intermediate section is in an inelastically deformed state (where no elastic deformation occurs). This elastic deformation of the intermediate section allows the first connecting section and / or the second connecting section to occupy a different position in the axial direction, ensuring that changes in the axial length of the unit (especially the rotor) can be compensated for by means of the elastic deformation of the intermediate section, so that the unit (especially the rotor) remains precisely supported even after changes in axial length. In particular, therefore, even under temperature variations of, for example, 200°C, precise centering support of the unit (especially the rotor) can be ensured. Due to the possibility of elastic deformation of the intermediate section, the receiving system can also be considered an elastic receiving system or an elastic receiving section, because during operation, i.e., when the unit is in the receiving state, especially when testing the rotor, the thermal load and / or length extension that occur can be elastically compensated. Preferably, the axial extension length of the intermediate section in the non-elastically deformed state, i.e., the thickness of the intermediate section, can be matched accordingly based on the unit to be received, especially based on the temperature range to be tested and based on the rotor to be tested, so that the elastic deformability of the intermediate section is coordinated with the corresponding length variation of the unit (especially the rotor) in the axial direction. In its inelastic deformation state, the axial extension length of the intermediate section, i.e., its thickness, is preferably less than both the axial extension length of the first connecting section and the second connecting section of the first receiving unit. This ensures a mechanically robust connection between the first receiving unit and the unit (especially the rotor), as well as a mechanically robust connection between the first receiving unit and the sections of the equipment (especially the test bench). It also ensures sufficient elastic deformability of the intermediate section while minimizing material usage, resulting in a particularly material-efficient and compact receiving system. The intermediate section preferably extends around the axis of rotation, and more preferably along a plane perpendicular to the axis of rotation. Because the intermediate section extends around the axis of rotation and along a plane perpendicular to the axis of rotation, the first receiving unit has high radial stiffness. Here, the radial stiffness of the first receiving unit is preferably uniform in the radial direction.The high radial stiffness of the first receiving unit, and especially its uniform stiffness in the radial direction, has a particularly positive effect on the operation of the unit (especially the rotor), thereby making the operation particularly smooth. Furthermore, the high radial stiffness of the first receiving unit, and especially its uniform stiffness in the radial direction, can significantly increase the bending critical speed. The bending critical speed can here refer to the speed at which the force of a constrained rotating unbalanced object causes resonance in the unit (especially the rotor) and / or the equipment (especially the test bench).

[0008] As previously described, the second receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. The intermediate section of the second receiving unit is preferably constructed similarly to the intermediate section of the first receiving unit, and the features, technical effects, and / or advantages described in association with the intermediate section of the first receiving unit also apply to the intermediate section of the second receiving unit in at least a similar manner, thus omitting corresponding redundancy here.

[0009] As previously described, the second connecting section of the first receiving unit has at least a segmented, radially outwardly pointing abutment surface, which is configured such that, in the inserted state, it forms a clearance fit with at least a segmented, radially inwardly pointing abutment surface of a section of the equipment (especially a test bench). Because the second connecting section of the first receiving unit has at least a segmented, radially outwardly pointing abutment surface, which is configured such that, in the inserted state, it forms a clearance fit with at least a segmented, radially inwardly pointing abutment surface of a section of the equipment (especially a test bench), it is ensured that the first receiving unit can be particularly easily assembled onto a section of the equipment (especially a test bench). This also makes it particularly easy to load units (especially rotors) into equipment for receiving units, especially test benches for testing rotors, via the first receiving unit and the second receiving unit. Therefore, this receiving system can also be considered particularly easy to assemble.

[0010] As previously described, the second connecting section of the second receiving unit has at least a segmented surrounding and radially outwardly pointing abutment surface, which is configured such that, in the connected state, it forms an interference fit with at least a segmented surrounding and radially inwardly pointing abutment surface of the second connecting section of the first receiving unit, thereby causing at least one segment of the second connecting section of the first receiving unit to deform radially outwardly in such a way that the at least segmented surrounding and radially outwardly pointing abutment surface of the second connecting section of the first receiving unit is forcefully and lockingly connected to the at least segmented surrounding and radially inwardly pointing abutment surface of a segment of the device (especially the test bench). Because the second connecting section of the second receiving unit has at least a segmented surrounding and radially outwardly pointing abutment surface, which is configured to form an interference fit with at least a segmented surrounding and radially inwardly pointing abutment surface of the second connecting section of the first receiving unit in the connected state, at least one segment of the second connecting section of the first receiving unit is radially outwardly deformed in such a way that the at least segmented surrounding and radially outwardly pointing abutment surface of the second connecting section of the first receiving unit is forcefully and lockingly connected to the at least segmented surrounding and radially inwardly pointing abutment surface of a section of the device (especially the test bench), thereby ensuring that the first receiving unit can be centered particularly precisely, especially relative to the axis of rotation, by means of the second receiving unit, which can also be referred to as precise centering of the first receiving unit. Because the first receiving unit is precisely centered by means of the second receiving unit, after the first receiving unit is precisely centered by means of the second receiving unit, the first receiving unit provides a particularly precisely centered section. This section of the unit (especially the rotor) can be directly or indirectly connected to this particularly precisely centered section via another component (e.g., the second receiving unit) or multiple other components, thereby making the unit (especially the rotor) also particularly precisely centered. Therefore, the unit (especially the rotor) can be tested with particularly precise centering. Thus, this receiving system ensures that concentricity errors can be avoided or at least kept to a particularly small degree.

[0011] In summary, it can be pointed out that, with the aid of the present invention, it is possible to install the unit into the device particularly easily for receiving the unit, and to center the unit in the device with particular precision in the installed state. In particular, with the aid of the present invention, it is possible to install the rotor into the test bench particularly easily for testing the rotor, and to center the rotor in the test bench with particular precision in the installed state.

[0012] In one embodiment, the first connecting section of the first receiving unit has at least a segmented, radially inwardly pointing abutment surface, which is configured such that it can be force-locked with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state. Because the first connecting section of the first receiving unit has at least a segmented, radially inwardly pointing abutment surface, which is configured such that it can be force-locked with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state, it ensures that the first receiving unit and the unit (especially the rotor) are connected to each other in the connected state, and torque can be transmitted between the first receiving unit and the unit (especially the rotor). Preferably, the force-locking connection is ensured by means of lateral pressing. The lateral press-fit is preferably established as follows: before force-locking the abutment surface of the first connecting section of the first receiving unit to the abutment surface of the unit (especially the rotor), the first receiving unit is heated at least segmentally, thereby causing the abutment surface of the first connecting section of the first receiving unit to expand outward in the radial direction. This results in no force being required in the axial direction for the connection between the abutment surface of the first connecting section of the first receiving unit and the abutment surface of the unit (especially the rotor), or only a force much smaller than that applied if the first receiving unit was not heated before force-locking the abutment surface of the first connecting section of the first receiving unit to the abutment surface of the unit (especially the rotor). Now, preferably, the abutment surface of the first connecting section of the first receiving unit is connected to the abutment surface of the unit (especially the rotor) in the axial direction, and the at least segmental heating of the first receiving unit is completed, thereby causing press-fitting during subsequent temperature compensation and thus establishing the lateral press-fit. During this process, the surface roughness of the contact surface of the first connecting section of the first receiving unit and the surface roughness of the contact surface of the unit (especially the rotor) remain largely unchanged, thereby obtaining a mechanically particularly stable mating seat.

[0013] In one embodiment, the first connecting section of the second receiving unit has at least a segmented, radially inwardly pointing abutment surface, which is configured to form a clearance fit with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state. Because the first connecting section of the second receiving unit has at least a segmented, radially inwardly pointing abutment surface, configured to form a clearance fit with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state, it ensures that the axial movement of the second receiving unit relative to the unit (especially the rotor) is particularly easy. Furthermore, the clearance fit between the abutment surface of the first connecting section of the second receiving unit and the abutment surface of the unit (especially the rotor) also ensures that the first connecting section of the second receiving unit can be arranged radially outside the segment of the unit (especially the rotor) to, in this case and when the first receiving unit mechanically fails due to overload, restrict the positioning of the unit (especially the rotor) radially outward by the second receiving unit. Therefore, when at least one section of the first receiving unit experiences mechanical failure and thus necessitates the termination of receiving the unit, particularly the termination of testing on the rotor, the unit (especially the rotor) can be received by the second receiving unit and safely braked or stopped by inertia. This is further improved if the second receiving unit is preferably guided close to the unit (especially the rotor).

[0014] In one embodiment, the first connecting section of the first receiving unit has at least a segmented surrounding and radially outward-opening slot. Because the first connecting section of the first receiving unit has at least a segmented surrounding and radially outward-opening slot, it ensures that a pulling tool can be radially inwardly inserted into the slot, and that the first receiving unit can be pulled away from the unit (especially the rotor) in the axial direction.

[0015] In one embodiment, the first connecting section of the first receiving unit is connected in the connected state to a section of the device (especially a test bench) that is rotatably supported about a rotation axis. Because the first connecting section of the first receiving unit is connected in the connected state to the section of the device (especially a test bench) that is rotatably supported about a rotation axis, it is ensured that the unit (especially a rotor) is rotatably supported on the frame of the device (especially the test bench) via the rotatably supported section of the device (especially the test bench) by means of the first receiving unit.

[0016] In one embodiment, the first connecting section of the second receiving unit has at least a segmented, radially inwardly pointing abutment surface, which is configured such that it can be force-locked with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state. Because the first connecting section of the second receiving unit has at least a segmented, radially inwardly pointing abutment surface, which is configured such that it can be force-locked with at least a segmented, radially outwardly pointing abutment surface of the unit (especially the rotor) in the connected state, torque can be transmitted between the second receiving unit and the unit (especially the rotor) in the connected state.

[0017] In one embodiment, the at least segmented surrounding and radially outwardly pointing abutment surface of a device (especially a test bench) that forms a clearance fit with the at least segmented surrounding and radially inwardly pointing abutment surface of the second connecting section of the first receiving unit in the inserted state is the abutment surface of a section of the device (especially the test bench) that is rotatable about a rotation axis. Alternatively, the receiving system has a centering ring having at least a segmented surrounding and radially inwardly pointing abutment surface that forms a clearance fit with the at least segmented surrounding and radially outwardly pointing abutment surface of the second connecting section of the first receiving unit in the inserted state.

[0018] In the case where the at least segmented, radially outward-pointing abutment surface of a device (especially a test bench) that forms a clearance fit with the second connecting section of the first receiving unit in the inserted state is the abutment surface of a section of the device (especially the test bench) that is rotatable about a rotation axis, this ensures that the clearance fit can be converted into a force-locked fit by means of the second receiving unit, thereby transmitting torque between the first receiving unit and the section of the device (especially the test bench) that is rotatable about a rotation axis. In the case where the receiving system has a centering ring (which has at least a segmented, radially outward-pointing abutment surface that forms a clearance fit with the at least segmented, radially outward-pointing abutment surface of the second connecting section of the first receiving unit in the inserted state), this ensures that the centering of the first receiving unit can be further improved.

[0019] According to a second aspect of the invention, the aforementioned task is accomplished by a first receiving unit having the features of claim 8. The first receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. The features, technical effects, and / or advantages described in association with the receiving system according to the first aspect of the invention also apply, at least in a similar manner, to the first receiving unit according to the second aspect of the invention, thus omitting corresponding repetitions here.

[0020] According to a third aspect of the invention, the aforementioned task is accomplished by a second receiving unit having the features of claim 9. The second receiving unit has a surrounding first connecting section, a surrounding second connecting section, and a surrounding intermediate section extending from the first connecting section to the second connecting section. The features, technical effects, and / or advantages described in association with the receiving system of the first aspect of the invention, and the features, technical effects, and / or advantages described in association with the first receiving unit of the second aspect of the invention, are also applicable to the second receiving unit of the third aspect of the invention in at least a similar manner, thus omitting corresponding repetitions here.

[0021] According to a fourth aspect of the invention, the aforementioned task is accomplished by a device having the features of claim 10. Preferably, the device is a test bench. The device is configured to receive a unit. Preferably, the test bench is configured to test the rotor of an electric drive. Alternatively, the test bench is preferably configured to test the rotor of a turbine. The unit is supported on the frame of the device in a rotatable manner about a rotational axis in the received state. Preferably, during testing, the rotor is supported on the frame of the test bench in a rotatable manner about a rotational axis. The device has a receiving system according to a first aspect of the invention. Preferably, the test bench has a receiving system according to a first aspect of the invention. The features, technical effects, and / or advantages described in association with the receiving system according to a first aspect of the invention, the features, technical effects, and / or advantages described in association with the first receiving unit according to a second aspect of the invention, and the features, technical effects, and / or advantages described in association with the second receiving unit according to a third aspect of the invention are also applicable, at least in a similar manner, to the device (especially the test bench) according to a fourth aspect of the invention, thus omitting corresponding repetitions here. Attached Figure Description

[0022] Other features, advantages, and applications of the invention will become apparent from the following description of the embodiments and illustrations. Here, all described and / or illustrated features, in themselves and in any combination thereof, constitute the subject matter of the invention and are independent of their combination in the individual claims or the claims they reference. Furthermore, in these figures, the same reference numerals are used for the same or similar objects.

[0023] Figure 1 A schematic diagram of a first embodiment of the test bench according to the present invention is shown;

[0024] Figure 2 and Figure 3 They are shown respectively in Figure 1 A schematic diagram of a corresponding section of a test bench according to a first embodiment of the present invention is shown in the figure.

[0025] Figure 4 and Figure 5 Schematic diagrams of a second embodiment of the test bench according to the present invention are shown respectively;

[0026] Figure 6 A second embodiment of the test bench according to the present invention is shown. Figure 5 A schematic diagram of the section marked with the letter "A" in the middle;

[0027] Figures 7 to 12 Schematic diagrams of corresponding sections of the test bench according to a second embodiment of the present invention are shown respectively;

[0028] Figure 13 A schematic diagram of a section of a test bench according to a third embodiment of the present invention is shown;

[0029] Figure 14 and Figure 15 Schematic diagrams of corresponding sections of the test bench according to the fourth embodiment of the present invention are shown respectively. Detailed Implementation

[0030] Figure 1 A schematic diagram of a first embodiment of the test bench 1 according to the present invention is shown. Figure 2 and Figure 3 They are shown respectively in Figure 1 The diagram shown is a schematic representation of a corresponding section of the test bench 1 according to a first embodiment of the present invention. Figure 4 and Figure 5 Schematic diagrams of a second embodiment of the test bench 1 according to the present invention are shown. Figure 6 A second embodiment of the test bench according to the present invention is shown. Figure 5 A schematic diagram of the section marked with the letter "A". Figures 7 to 12 Schematic diagrams of corresponding sections of the test bench 1 according to the second embodiment of the present invention are shown respectively. Figure 13 A schematic diagram of a section of the test bench 1 according to a third embodiment of the present invention is shown. Figure 14 and Figure 15 Schematic diagrams of corresponding sections of the test bench 1 according to the fourth embodiment of the present invention are shown respectively.

[0031] Test bench 1 is configured to test the rotor 3 of an electric actuator. During testing, the rotor 3 is supported on the frame 7 of test bench 1 in a manner that allows it to rotate about a rotation axis 5. When testing the rotor 3 of the electric actuator, the rotor 3 repeatedly rotates about the rotation axis 5, accelerating to its maximum speed and then braking again, which can also be referred to as deceleration. Here, the rotor 3 is subjected to different operating temperatures. The testing of the rotor 3 may last for several hours or days. Test bench 1 can also be referred to as a speed change tester (SCT). Test bench 1 has a receiving system 9. Therefore, the receiving system 9 is configured for test bench 1. The receiving system 9 has a first receiving unit 11 and a second receiving unit 13. The first receiving unit 11 has a surrounding first connecting section 15, a surrounding second connecting section 17, and a surrounding intermediate section 19 extending from the first connecting section 15 to the second connecting section 17. The second receiving unit 13 has a surrounding first connecting section 21, a surrounding second connecting section 23, and a surrounding intermediate section 25 extending from the first connecting section 21 to the second connecting section 23.

[0032] Test bench 1 forms one embodiment of the apparatus for receiving units according to the present invention. Furthermore, a test bench for testing turbine rotors is also an embodiment of the apparatus for receiving units according to the present invention. Additionally, a machine tool also forms one embodiment of the apparatus for receiving units according to the present invention, wherein, in this embodiment, the unit is a tool that can be received by the machine tool. The features, technical effects, and / or advantages described in connection with test bench 1 for testing electric drive rotors are also applicable, at least in a similar manner, to test benches for testing turbine rotors, thus omitting corresponding repetitions here. Furthermore, the features, technical effects, and / or advantages described in connection with electric drive rotor 3 are also applicable, at least in a similar manner, to turbine rotors, thus omitting corresponding repetitions here. The features, technical effects, and / or advantages described in connection with test bench 1 for testing electric drive rotors and the features, technical effects, and / or advantages described in connection with test benches for testing turbine rotors are also applicable, at least in a similar manner, to machine tools, thus omitting corresponding repetitions here. The features, technical effects and / or advantages described in connection with the rotor 3 of the electric drive and the features, technical effects and / or advantages described in connection with the rotor of the turbine are also applicable, at least in a similar manner, to tools that can be accepted by machine tools, thus omitting the corresponding repetitions here.

[0033] In both the first and second embodiments of the test bench 1 according to the invention, the first connecting section 15 of the first receiving unit 11 has at least a segmented, radially inwardly pointing abutment surface 27. The abutment surface 27 is configured such that, in the connected state, it can be forcefully engaged with at least a segmented, radially outwardly pointing abutment surface 29 of the rotor 3. In both the first and second embodiments of the test bench 1 according to the invention, this force-locking connection is ensured by means of lateral pressing. The lateral press-fit is established as follows: before the force-locked connection of the contact surface 27 of the first connecting section 15 of the first receiving unit 11 with the contact surface 29 of the rotor 3, the first receiving unit 11 is heated at least in sections, thereby causing the contact surface 27 of the first connecting section 15 of the first receiving unit 11 to expand outward in the radial direction. This results in no axial force required or only a force much smaller than that applied if the first receiving unit 11 was not heated before the force-locked connection of the contact surface 27 of the first connecting section 15 of the first receiving unit 11 with the contact surface 29 of the rotor 3. Now, the contact surface 27 of the first connecting section 15 of the first receiving unit 11 and the contact surface 29 of the rotor 3 are connected to each other in the axial direction, and the at least sectioned heating of the first receiving unit 11 is completed, thereby causing a press-fit during subsequent temperature compensation and thus establishing the lateral press-fit. During this process, the surface roughness of the contact surface 27 of the first connecting section 15 of the first receiving unit 11 and the surface roughness of the contact surface 29 of the rotor 3 remain largely unchanged, thereby obtaining a mechanically particularly stable mating seat.

[0034] In both the first and second embodiments of the test bench 1 according to the invention, the contact surface 27 of the first connecting section 15 of the first receiving unit 11 is configured to completely surround the rotor. Because the contact surface 27 of the first connecting section 15 of the first receiving unit 11 is configured to completely surround the rotor, a particularly mechanically robust connection is provided between the first receiving unit 11 and the rotor 3, especially in conjunction with the completely surrounding contact surface 29 of the rotor 3. When the rotor 3 is placed in the test bench 1 for testing, the first receiving unit 11 and the rotor 3 are in a connected state in which the contact surface 27 of the first connecting section 15 of the first receiving unit 11 is force-locked to the contact surface 29 of the rotor 3. This force-locked connection between the contact surface 27 of the first connecting section 15 of the first receiving unit 11 and the contact surface 29 of the rotor 3 ensures torque transmission from the rotor 3 to the first receiving unit 11 and / or from the first receiving unit 11 to the rotor 3. The force-locking connection between the contact surface 27 of the first connecting section 15 of the first receiving unit 11 and the contact surface 29 of the rotor 3 refers to the force-locking between these two components against the relative rotational motion around the rotation axis 5.

[0035] In a first embodiment and a second embodiment of the test bench 1 according to the invention, the first connecting section 15 of the first receiving unit 11 has a groove 31 that is at least segmentally surrounding and radially open. Because the groove 31 is configured to be at least segmentally surrounding and radially open, a pulling tool can be radially inserted into the groove 31 to pull the first receiving unit 11 axially away from the rotor 3. Preferably, the first receiving unit 11 is first heated at least segmentally to minimize the force required in the axial direction to pull the first receiving unit 11 away from the rotor 3. In a first embodiment and a second embodiment of the test bench 1 according to the invention, the groove 31 is configured to be completely surrounding. Because the groove 31 is configured to be completely surrounding, a pulling tool can be radially inserted into the groove 31 completely surrounding it, thereby allowing a particularly large force to be applied to pull the first receiving unit 11 away from the rotor 3.

[0036] In a first embodiment and a second embodiment of the test bench 1 according to the invention, the second connecting section 17 of the first receiving unit 11 has at least a segmented, radially outwardly pointing abutment surface 33. The abutment surface 33 is configured such that, in its inserted state, it forms a clearance fit with at least a segmented, radially inwardly pointing abutment surface 35 of a section 37 of the test bench 1, which is supported in a manner rotatable about a rotation axis 5. Because a clearance fit is provided between the abutment surface 33 of the second connecting section 17 of the first receiving unit 11 and the abutment surface 35 of the section 37 of the test bench 1, ensuring that the first receiving unit 11 can be particularly easily assembled onto the section 37 of the test bench 1, the receiving system 9 can also be considered particularly easy to assemble.

[0037] In the first embodiment and the second embodiment of the test bench 1 according to the invention, the contact surface 33 of the second connecting section 17 of the first receiving unit 11 is configured to completely surround the test bench. Because the contact surface 33 of the second connecting section 17 of the first receiving unit 11 is configured to completely surround the test bench, a particularly mechanically robust connection is provided between the first receiving unit 11 and the section 37 of the test bench 1, especially in conjunction with the completely surrounding contact surface 35 of the section 37 of the test bench 1, which will be discussed later. To place the rotor 3 into the test bench 1 for testing, the first receiving unit 11 and the rotor 3 are first placed in the aforementioned connected state, in which the contact surface 27 of the first connecting section 15 of the first receiving unit 11 is force-locked to the contact surface 29 of the rotor 3. Next, the rotor 3 and the first receiving unit 11 are inserted together into section 37 of the test bench 1, thereby placing the first receiving unit 11 in the inserted state. In this inserted state, the contact surface 33 and the contact surface 35 of at least a segment of the section 37 of the test bench 1, which is supported in a manner rotatable about the rotation axis 5, form a clearance fit. This clearance fit allows the first receiving unit 11 to be brought into the inserted state particularly easily. Preferably, the second connecting section 17 of the first receiving unit 11 is in an undeformed state, particularly in a state without elastic deformation. The clearance fit between the contact surface 33 of the second connecting section 17 of the first receiving unit 11 and the contact surface 35 of section 37 of the test bench 1 refers to the clearance fit between these two components, which ensures relative rotational movement about the rotation axis 5.

[0038] In the first embodiment and the second embodiment of the test bench 1 according to the invention, the first connecting section 21 of the second receiving unit 13 has at least a segmented, radially inwardly pointing abutment surface 39. The abutment surface 39 is configured such that, in the connected state, it forms a clearance fit with the at least segmented, radially outwardly pointing abutment surface 41 of the rotor 3. The aforementioned abutment surface 29 of the rotor 3 may also be referred to as the first abutment surface of the rotor 3, and the abutment surface 41 of the rotor 3 mentioned herein may also be referred to as the second abutment surface of the rotor 3. Because a clearance fit is provided between the abutment surface 39 of the first connecting section 21 of the second receiving unit 13 and the abutment surface 41 of the rotor 3, it is particularly easy to ensure that the second receiving unit 13 can move relative to the rotor 3 in the axial direction. Furthermore, since a clearance fit is provided between the contact surface 39 of the first connecting section 21 of the second receiving unit 13 and the contact surface 41 of the rotor 3, it is also ensured that the first connecting section 21 of the second receiving unit 13 is arranged radially outside the section of the rotor 3, so that when the first receiving unit 11 is about to fail mechanically due to overload, the positioning of the rotor 3 is restricted outward in the radial direction by the second receiving unit 13. Therefore, when at least one section of the first receiving unit 11 fails mechanically and the test of the rotor 3 must therefore be terminated, the rotor 3 can be received by the second receiving unit 13 and can be safely braked or stopped by inertia. This is achieved in particular by guiding the second receiving unit 13 close to the rotor 3.

[0039] In the first embodiment and the second embodiment of the test bench 1 according to the invention, the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is configured to completely surround the rotor. Because the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is configured to completely surround the rotor, especially in conjunction with the completely surrounding contact surface 41 of the rotor 3, it provides particularly robust mechanical protection in the event of mechanical failure of at least one section of the first receiving unit 11. To place the rotor 3 into the test bench 1 for testing, the second receiving unit 13 is first guided relative to the rotor 3 in the axial direction, such that the contact surface 39 and the contact surface 41 of the rotor 3 form a clearance fit. This clearance fit allows the second receiving unit 13 to move particularly easily relative to the rotor 3 in the axial direction. Next, as described above, the first receiving unit 11 and the rotor 3 are guided to the previously described connection state, in which the contact surface 27 of the first connecting section 15 of the first receiving unit 11 is force-locked to the contact surface 29 of the rotor 3. The clearance fit between the contact surface 39 of the first connecting section 21 of the second receiving unit 13 and the contact surface 41 of the rotor 3 refers to the clearance fit between these two components, which ensures the relative rotational movement around the rotation axis 5 and the relative axial movement parallel to the rotation axis 5.

[0040] In a first embodiment of the test bench 1 according to the invention and in a second embodiment of the test bench 1 according to the invention, the second connecting section 23 of the second receiving unit 13 has at least a segmented surrounding and radially outwardly pointing abutment surface 43. The abutment surface 43 is configured such that, in the connected state, it forms an interference fit with at least a segmented surrounding and radially inwardly pointing abutment surface 45 of the second connecting section 17 of the first receiving unit 11, thereby causing at least one segment of the second connecting section 17 of the first receiving unit 11 to deform radially outwardly in such a way that the at least segmented surrounding and radially outwardly pointing abutment surface 33 of the second connecting section 17 of the first receiving unit 11 is force-locked to each other with the at least segmented surrounding and radially inwardly pointing abutment surface 35 of the section 37 of the test bench 1, which is supported in a manner rotatable about the rotation axis 5. Therefore, in the connected state, the interference fit between the contact surface 43 of the second connecting section 23 of the second receiving unit 13 and the contact surface 45 of the second connecting section 17 of the first receiving unit 11 causes at least one section of the second connecting section 17 of the first receiving unit 11 to deform radially outward in such a way that a force-locking connection is established between the contact surface 33 of the second connecting section 17 of the first receiving unit 11 and the contact surface 35 of the section 37 of the test platform 1, which was originally present in the inserted state. Because the contact surface 43 is configured to form an interference fit with at least a segmented surrounding and radially inwardly pointing contact surface 45 of the second connecting section 17 of the first receiving unit 11 in the connected state, at least one segment of the second connecting section 17 of the first receiving unit 11 is radially deformed outward in such a way that the at least segmented surrounding and radially outwardly pointing contact surface 33 of the second connecting section 17 of the first receiving unit 11 is force-locked to each other with the at least segmented surrounding and radially inwardly pointing contact surface 35 of the section 37 of the test table 1 that is supported in a manner that allows rotation about the rotation axis 5, the first receiving unit 11 can be precisely centered by means of the second receiving unit 13, especially with respect to the rotation axis 5. This can also be referred to as precise centering of the first receiving unit 11. Because the first receiving unit 11 provides a particularly precise centered section by means of the second receiving unit 13, the section of the rotor 3 can be directly or indirectly connected to the particularly precise centered section via another component (such as the second receiving unit 13) or multiple other components, thereby making the rotor 3 also particularly precise centered.As previously described, in both the first and second embodiments of the test bench 1 according to the invention, the first connecting section 15 of the first receiving unit 11 has at least a segmented, circumferentially oriented, radially inwardly pointing abutment surface 27, which is configured such that it can be force-locked with at least a segmented, circumferentially oriented, radially outwardly pointing abutment surface 29 of the rotor 3 in the connected state. This force-locking connection is ensured by lateral pressing not only in the first embodiment of the test bench 1 according to the invention but also in the second embodiment. Therefore, when the first receiving unit 11 is connected to the rotor 3 and, in this connected state, the first receiving unit 11 is centered particularly precisely with respect to the rotation axis 5 by means of the second receiving unit 13, the rotor 3 is also centered particularly precisely with respect to the rotation axis 5, thereby allowing for particularly precise testing of the rotor 3. Thus, the receiving system 9 ensures that concentricity errors can be avoided or at least kept particularly small.

[0041] Furthermore, the second connecting section 17 of the first receiving unit 11 has a mating surface 49 that points in the axial direction and is arranged on and toward the first side 47 of the first receiving unit 11. Additionally, the first connecting section 15 of the first receiving unit 11 also has a mating surface 53 that points in the axial direction and is arranged on and toward the second side 51 of the first receiving unit 11 opposite to the first side 47. Since the second connecting section 17 of the first receiving unit 11 has a contact surface 49 that points in the axial direction and is arranged on the first side 47 of the first receiving unit 11 and points toward the first side 47, and the first connecting section 15 of the first receiving unit 11 has a contact surface 53 that points in the axial direction and is arranged on the second side 51 of the first receiving unit 11 opposite to the first side 47 and points toward the second side 51, the first receiving unit 11 can use the contact surface 49 to contact the contact surface of the section 37 of the test table 1 that points in the axial direction and toward the second side 51, and can use the contact surface 53 to contact the contact surface of the rotor 3 that points in the axial direction and toward the first side 47, so that the rotor 3 can be received by the test table 1 without gaps in the axial direction. Through the contact surface described herein, through the elastic deformability of the intermediate section 19 of the first receiving unit 11 which will be described later, and through the connection between the rotor 3, the first receiving unit 11, the second receiving unit 13 and the section 37 of the test bench 1 which have already been described, the receiving system 9 thus ensures the transmission of torque while providing clearanceless, elastic reception of the rotor 3 (which may also be referred to as an electric vehicle rotor).

[0042] As previously described, the surrounding intermediate section 19 of the first receiving unit 11 extends from the first connecting section 15 to the second connecting section 17. Because the surrounding intermediate section 19 of the first receiving unit 11 extends from the first connecting section 15 to the second connecting section 17, the intermediate section 19 can elastically deform in such a way that, when the intermediate section 19 is in an elastically deformed state (in which the intermediate section 19 undergoes elastic deformation), the first connecting section 15 and / or the second connecting section 17 are offset in the axial direction compared to when the intermediate section 19 is in an inelastically deformed state (in which the intermediate section 19 does not undergo elastic deformation). The elastic deformation of the intermediate section 19 allows the first connecting section 15 and / or the second connecting section 17 to occupy a different position in the axial direction due to the elastic deformation of the intermediate section 19. This ensures that changes in the axial length of the rotor 3 can be compensated for by means of the elastic deformation of the intermediate section 19, such that the rotor 3 remains precisely supported even after changes in axial length. In particular, therefore, even under temperature variations of, for example, 200°C, precise centering of the rotor 3 can be ensured. Due to the possibility of elastic deformation of the intermediate section 19, the receiving system 9 can also be referred to as an elastic receiving system 9 or an elastic receiving part, because the thermal load and / or length extension that occur during operation, i.e., when testing the rotor 3, can be elastically compensated. Here, the axial extension length of the intermediate section 19 in the non-elastically deformed state, i.e., the thickness of the intermediate section 19, can be matched accordingly based on the temperature range to be tested and the rotor 3 to be tested, thereby coordinating the elastic deformability of the intermediate section 19 with the corresponding length change of the rotor 3 in the axial direction. In its inelastic deformation state, the axial extension length of the intermediate section 19, i.e., its thickness, is not only less than the axial extension length of both the first connecting section 15 and the second connecting section 17 of the first receiving unit 11. This ensures not only a mechanically secure connection between the first receiving unit 11 and the rotor 3, and between the first receiving unit 11 and section 37 of the test bench 1, but also sufficient elastic deformability of the intermediate section 19, while simultaneously minimizing material usage. This allows the receiving system 9 to be constructed with particularly economical materials and a compact form. The intermediate section 19 extends around the rotation axis 5 and along a plane perpendicular to the rotation axis 5. Because the intermediate section 19 extends around the rotation axis 5 and along a plane perpendicular to the rotation axis 5, the first receiving unit 11 possesses high radial stiffness. Furthermore, the radial stiffness of the first receiving unit 11 is uniform in the radial direction.The higher radial stiffness of the first receiving unit 11, and especially its uniform stiffness in the radial direction, has a particularly positive effect on the operation of the rotor 3, resulting in exceptionally smooth operation. Furthermore, the higher radial stiffness of the first receiving unit 11, and especially its uniform stiffness in the radial direction, can significantly increase the bending critical speed. The bending critical speed is the speed at which the force of the constrained rotating unbalanced object causes resonance in the rotor 3 and / or the test bench 1.

[0043] Furthermore, the first receiving unit 11 has a plurality of holes arranged on the circumference of a circle concentrically arranged with respect to the abutment surface 33 of the second connecting section 17 of the first receiving unit 11, wherein each hole 55 extends parallel to the rotation axis 5 in the assembled state. Furthermore, the second receiving unit 13 has a plurality of holes arranged on the circumference of a circle concentrically arranged with respect to the abutment surface 43 of the second connecting section 23 of the second receiving unit 13, wherein each hole 55 extends parallel to the rotation axis 5 in the assembled state. With the aid of these holes and corresponding fastening devices (exemplarily screws, wherein each screw 57 corresponds to a corresponding hole 55 in the first receiving unit 11 and a corresponding hole 55 in the second receiving unit 13), the second receiving unit 13 and the first receiving unit 11 can be connected together such that the second receiving unit 13 is positioned relative to the first receiving unit 11 such that the second connecting section 23 of the second receiving unit 13 causes the second connecting section 17 of the first receiving unit 11 to elastically deform radially outward, thereby placing the second connecting section 17 of the first receiving unit 11 at least segmentally in the aforementioned elastically deformed state.

[0044] Furthermore, the second receiving unit 13 also has a plurality of balancing holes arranged on the circumference of a circle concentrically arranged with the abutment surface 43 of the second connecting section 23 of the second receiving unit 13, wherein each balancing hole 59 extends parallel to the rotation axis 5 in the assembled state. Each balancing hole 59 is provided with internal threads. In order to balance the weight of the rotor 3 or the section containing the rotor 3 that rotates around the rotation axis 5 during testing of the rotor 3, that is, to reduce or eliminate the imbalance of the rotor 3 or the section containing the rotor 3 that rotates around the rotation axis 5 during testing of the rotor 3, a corresponding threaded pin, which may also be referred to as a countersunk screw, can be screwed into each balancing hole 59.

[0045] Furthermore, the second receiving unit 13 has a plurality of press-fit holes arranged on the circumference of a circle concentrically arranged with respect to the abutment surface 43 of the second connecting section 23 of the second receiving unit 13, wherein each press-fit hole 61 extends parallel to the rotation axis 5 in the assembled state. Each press-fit hole 61 is provided with internal threads. In order to remove the second receiving unit 13 from the first receiving unit 11, a screw is led into the press-fit hole, and then the screw is abutted against the first receiving unit 11 by means of its end section, and the second receiving unit 13 is pressed off the first receiving unit 11 by further screwing it into the thread. This significantly simplifies the disassembly of the first receiving unit 11 and the second receiving unit 13. In summary, high torque can be transmitted to the rotor 3 under test by means of the receiving system 9, and high rotational speed of the rotor 3 can be achieved.

[0046] As mentioned above, Figure 13 A schematic diagram of a section of the test bench 1 according to a third embodiment of the present invention is shown, and Figure 14 and Figure 15 Schematic diagrams of corresponding sections of the test bench 1 according to the fourth embodiment of the present invention are shown respectively.

[0047] exist Figure 13 In the third embodiment of the test bench 1 according to the invention, as schematically shown, the receiving system 9 is substantially the same in construction as the receiving system 9 of the first embodiment of the test bench 1 according to the invention, and also the same in construction as the receiving system 9 of the second embodiment of the test bench 1 according to the invention. In addition to the first receiving unit 11 and the second receiving unit 13, the receiving system 9 also has a clamping ring 63. The clamping ring 63 extends around the rotation axis 5 in the assembled state. The clamping ring 63 is configured such that it is arranged around a section of the first connecting section 15 of the first receiving unit 11 in the assembled state. The clamping ring 63 has a surrounding and radially inwardly pointing abutting surface that abuts against the surrounding and radially outwardly pointing abutting surface of the first connecting section 15 of the first receiving unit 11, such that at least one section of the first connecting section 15 of the first receiving unit 11 is radially inwardly elastically deformed, thereby establishing a force-locking connection between the abutting surface 27 of the first connecting section 15 of the first receiving unit 11 and the abutting surface 29 of the rotor 3. This force-locking connection established by clamping ring 63 provides an alternative to the aforementioned lateral pressing and can also be referred to as a clamping connection. The advantage of a clamping connection over lateral pressing is particularly that it simplifies the assembly and disassembly of the parts to be connected, and thus, especially during connection and release, the mating surfaces of these parts are not damaged, or are subjected to only slight mechanical loads.

[0048] exist Figure 14 and Figure 15In the fourth embodiment of the test bench 1 according to the present invention, which is schematically shown, the receiving system 9 is substantially the same in construction as the receiving system 9 in the first embodiment of the test bench 1 according to the present invention, and is also substantially the same in construction as the receiving system 9 in the second embodiment of the test bench 1 according to the present invention.

[0049] In a fourth embodiment of the test bench 1 according to the present invention, the first connecting section 15 of the first receiving unit 11 is connected to the section 37 of the test bench 1 that is rotatable about the rotation axis 5 in the connected state. Since the first connecting section 15 of the first receiving unit 11 is connected to the section 37 of the test bench 1 that is rotatable about the rotation axis 5 in the connected state, it is ensured that the rotor 3 can be rotatably supported on the frame 7 of the test bench 1 by means of the first receiving unit 11.

[0050] Furthermore, in a fourth embodiment of the test bench 1 according to the invention, the first connecting section 21 of the second receiving unit 13 has at least a segmented, radially inwardly pointing abutment surface 39, which is configured such that it can be forcefully locked into connection with at least a segmented, radially outwardly pointing abutment surface 41 of the rotor 3 in the connected state, and remains in a force-locked connection in the connected state. In the fourth embodiment of the test bench 1 according to the invention, the force-locked connection is ensured by means of lateral pressing. The lateral press-fit is established as follows: before force-locking the contact surface 39 of the first connecting section 21 of the second receiving unit 13 to the contact surface 41 of the rotor 3, the second receiving unit 13 is heated at least in sections, thereby causing the contact surface 39 of the first connecting section 21 of the second receiving unit 13 to expand outward in the radial direction. This results in no axial force required or only a force much smaller than that applied if the second receiving unit 13 was not heated before force-locking the contact surface 39 of the first connecting section 21 of the second receiving unit 13 to the contact surface 41 of the rotor 3 for the connection of the two sections. Now, the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is connected to the contact surface 41 of the rotor 3 in the axial direction, and the at least section heating of the second receiving unit 13 is completed, thereby causing press-fitting during subsequent temperature compensation and thus establishing the lateral press-fit. During this process, the surface roughness of the contact surface 39 of the first connecting section 21 of the second receiving unit 13 and the surface roughness of the contact surface 41 of the rotor 3 remain largely unchanged, thereby obtaining a mechanically particularly stable mating seat.

[0051] In a fourth embodiment of the test bench 1 according to the invention, the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is configured to completely surround the rotor. Because the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is configured to completely surround the rotor, especially in conjunction with the completely surrounding contact surface 41 of the rotor 3, a particularly mechanically robust connection is provided between the second receiving unit 13 and the rotor 3. When the rotor 3 is placed in the test bench 1 for testing, the second receiving unit 13 and the rotor 3 are in a connected state, in which the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is force-locked to the contact surface 41 of the rotor 3. This force-locked connection between the contact surface 39 of the first connecting section 21 of the second receiving unit 13 and the contact surface 41 of the rotor 3 ensures torque transmission from the rotor 3 to the second receiving unit 13 and / or from the second receiving unit 13 to the rotor 3. The force-locking connection between the contact surface 39 of the first connecting section 21 of the second receiving unit 13 and the contact surface 41 of the rotor 3 refers to the force-locking between these two components against the relative rotational motion around the rotation axis 5.

[0052] In a fourth embodiment of the test bench 1 according to the invention, the receiving system 9 has a centering ring 65. Furthermore, in the fourth embodiment of the test bench 1 according to the invention, the second connecting section 17 of the first receiving unit 11 has at least a segmented, radially outwardly pointing abutment surface 33. The abutment surface 33 is configured such that, in the inserted state, it forms a clearance fit with the at least segmented, radially inwardly pointing abutment surface 67 of the centering ring 65. Because a clearance fit is provided between the abutment surface 33 of the second connecting section 17 of the first receiving unit 11 and the abutment surface 67 of the centering ring 65, it is ensured that the first receiving unit 11 can be particularly easily assembled onto the centering ring 65, thus making the receiving system 9 also particularly easy to assemble.

[0053] In a fourth embodiment of the test bench 1 according to the invention, the contact surface 33 of the second connecting section 17 of the first receiving unit 11 is configured to completely surround the rotor. Because the contact surface 33 of the second connecting section 17 of the first receiving unit 11 is configured to completely surround the rotor, especially in conjunction with the completely surrounding contact surface 67 of the centering ring 65, a particularly mechanically robust connection is provided between the first receiving unit 11 and the centering ring 65, which will be discussed in detail later. To place the rotor 3 into the test bench 1 for testing, the second receiving unit 13 and the rotor 3 are first brought into the aforementioned connected state, in which the contact surface 39 of the first connecting section 21 of the second receiving unit 13 is force-locked to the contact surface 41 of the rotor 3. The first receiving unit 11 is fastened to section 37 of the test stage 1 and is in the inserted state, in which the contact surface 33 and the contact surface 67 of the centering ring 65, which is at least segmentally surrounding and radially inwardly pointing, form a clearance fit. This clearance fit allows the first receiving unit 11 to be brought into the inserted state particularly easily. Preferably, the second connecting section 17 of the first receiving unit 11 is in an undeformed state, especially in an inelastically deformed state. The clearance fit between the contact surface 33 of the second connecting section 17 of the first receiving unit 11 and the contact surface 67 of the centering ring 65 refers to the clearance fit between these two components, which ensures relative rotational movement about the rotation axis 5.

[0054] In a fourth embodiment of the test bench 1 according to the invention, the second connecting section 23 of the second receiving unit 13 has at least a segmented surrounding and radially outwardly pointing abutment surface 43. The abutment surface 43 is configured such that, in the connected state, it forms an interference fit with at least a segmented surrounding and radially inwardly pointing abutment surface 45 of the second connecting section 17 of the first receiving unit 11, thereby causing at least one segment of the second connecting section 17 of the first receiving unit 11 to deform radially outwardly in such a way that the at least segmented surrounding and radially outwardly pointing abutment surface 33 of the second connecting section 17 of the first receiving unit 11 is forcefully and lockingly connected to the at least segmented surrounding and radially inwardly pointing abutment surface 67 of the centering ring 65. Therefore, in the connected state, the interference fit between the contact surface 43 of the second connecting section 23 of the second receiving unit 13 and the contact surface 45 of the second connecting section 17 of the first receiving unit 11 causes at least one section of the second connecting section 17 of the first receiving unit 11 to deform radially outward in such a way that a force-locking connection is established between the contact surface 33 of the second connecting section 17 of the first receiving unit 11 and the contact surface 67 of the centering ring 65 from the originally existing clearance fit between the contact surface 33 of the second connecting section 17 of the first receiving unit 11 and the contact surface 67 of the centering ring 65. Because the contact surface 43 is configured to form an interference fit with at least a segment of the second connecting section 17 of the first receiving unit 11, which is radially inwardly oriented, in the connected state, at least one segment of the second connecting section 17 of the first receiving unit 11 is radially outwardly deformed in such a way that the contact surface 33 of the second connecting section 17 of the first receiving unit 11 is forcefully and lockingly connected to the contact surface 67 of the centering ring 65, which is radially inwardly oriented, thereby ensuring that the first receiving unit 11 can be precisely centered by means of the second receiving unit 13, especially relative to the rotation axis 5. This can also be referred to as precise centering of the first receiving unit 11. Because the first receiving unit 11 is precisely centered by means of the second receiving unit 13, the first receiving unit 11 provides a particularly precisely centered section. A section of the rotor 3 can be directly or indirectly connected to this precisely centered section via another component (e.g., the second receiving unit 13) or multiple other components, thereby also precisely centered the rotor 3. As previously described, in the fourth embodiment of the test bench 1 according to the invention, the first connecting section 21 of the second receiving unit 13 has at least a segmented, circumferentially, and radially inwardly pointing abutment surface 39, which is configured such that it can be force-locked connected with at least a segmented, circumferentially, and radially outwardly pointing abutment surface 41 of the rotor 3 in the connected state. In the connected state, this force-locking connection is ensured by means of lateral pressing.Therefore, when the second receiving unit 13 is connected to the rotor 3 and the first receiving unit 11 is precisely centered, especially relative to the rotation axis 5, by means of the second receiving unit 13, the second receiving unit 13 and the rotor 3 are also precisely centered, especially relative to the rotation axis 5, so that the rotor 3 can be tested with particularly precise centering. Thus, the receiving system 9 ensures that concentricity error can be avoided or at least kept to a small extent.

[0055] Furthermore, the second connecting section 23 of the second receiving unit 13 has a mating surface 71 that points in the axial direction and is arranged on and toward the first side 69 of the second receiving unit 13. Furthermore, the first connecting section 21 of the second receiving unit 13 has a mating surface 75 that points in the axial direction and is arranged on and toward the second side 73 of the second receiving unit 13 opposite to the first side 69. Since the second connecting section 23 of the second receiving unit 13 has a contact surface 71 that points in the axial direction and is arranged on the first side 69 of the second receiving unit 13 and points toward the first side 69, and the first connecting section 21 of the second receiving unit 13 has a contact surface 75 that points in the axial direction and is arranged on the second side 73 of the second receiving unit 13 opposite to the first side 69 and points toward the second side 73, the second receiving unit 13 can use the contact surface 71 to contact the contact surface of the second connecting section 17 of the first receiving unit 11 that points in the axial direction and toward the second side 73, and can use the contact surface 75 to contact the contact surface of the rotor 3 that points in the axial direction and toward the first side 69, so that the rotor 3 can be received by the test bench 1 without gaps in the axial direction. Through the contact surface described herein, through the elastic deformability of the intermediate section 19 of the first receiving unit 11, and through the connection already described between the rotor 3, the second receiving unit 13, the first receiving unit 11 and the section 37 of the test bench 1, the receiving system 9 ensures the transmission of torque while providing clearanceless, elastic reception of the rotor 3 (which may also be referred to as the electric vehicle rotor).

[0056] As previously described, the surrounding intermediate section 19 of the first receiving unit 11 extends from the first connecting section 15 to the second connecting section 17. Because the surrounding intermediate section 19 of the first receiving unit 11 extends from the first connecting section 15 to the second connecting section 17, the intermediate section 19 can elastically deform in such a way that, when the intermediate section 19 is in an elastically deformed state (in which the intermediate section 19 undergoes elastic deformation), the first connecting section 15 and / or the second connecting section 17 are offset in the axial direction compared to when the intermediate section 19 is in an inelastically deformed state (in which the intermediate section 19 does not undergo elastic deformation). Through the elastic deformation of the intermediate section 19, the first connecting section 15 and / or the second connecting section 17 can occupy a different position in the axial direction due to the elastic deformation of the intermediate section 19, thereby ensuring that changes in the axial length of the rotor 3 can be compensated by means of the elastic deformation of the intermediate section 19 in the sense that the rotor 3 is still precisely supported even after changes in axial length. In particular, therefore, even under temperature variations of, for example, 200°C, precise centering of the rotor 3 can be ensured. Due to the possibility of elastic deformation of the intermediate section 19, the receiving system 9 can also be referred to as an elastic receiving system 9 or an elastic receiving part, because the thermal load and / or length extension that occur during operation, i.e., when testing the rotor 3, can be elastically compensated. Here, the axial extension length of the intermediate section 19 in the non-elastically deformed state, i.e., the thickness of the intermediate section 19, can be matched accordingly based on the temperature range to be tested and the rotor 3 to be tested, thereby coordinating the elastic deformability of the intermediate section 19 with the corresponding length change of the rotor 3 in the axial direction. In its inelastic deformation state, the axial extension length of the intermediate section 19, i.e., its thickness, is not only less than the axial extension length of both the first connecting section 15 and the second connecting section 17 of the first receiving unit 11. This ensures a mechanically secure connection between the first receiving unit 11 and section 37 of the test bench 1, as well as a mechanically secure connection between the first receiving unit 11, the centering ring 65, and the second receiving unit 13. Furthermore, it ensures sufficient elastic deformability of the intermediate section 19 while minimizing material usage, resulting in a particularly material-efficient and compact construction of the receiving system 9. The intermediate section 19 extends around the rotation axis 5 and along a plane perpendicular to the rotation axis 5. Because the intermediate section 19 extends around the rotation axis 5 and along a plane perpendicular to the rotation axis 5, the first receiving unit 11 exhibits high radial stiffness. Here, the radial stiffness of the first receiving unit 11 is uniform in the radial direction.The high radial stiffness of the first receiving unit 11, and especially its uniform stiffness in the radial direction, has a particularly positive effect on the operation of the rotor 3, resulting in exceptionally smooth operation. Furthermore, the high radial stiffness of the first receiving unit 11, and especially its uniform stiffness in the radial direction, can significantly increase the bending critical speed. The bending critical speed is defined here as the speed at which the force of the constrained rotating unbalance causes resonance in the rotor 3 and / or the test bench 1. In summary, the receiving system 9 allows for the transmission of higher torque to the rotor 3 under test, and enables high rotational speeds of the rotor 3.

[0057] In these embodiments of the test bench 1 shown, the test bench 1 has two receiving systems, each of which corresponds to the receiving system 9 shown and described in the respective embodiment of the test bench 1. Because the test bench 1 has two receiving systems, exceptionally high torque can be transmitted to the rotor 3 under test via the receiving system 9, and exceptionally high rotational speeds of the rotor 3 can be achieved.

[0058] The term "radial direction" is used in the context of this invention. The radial direction preferably refers to the assembly state of the rotor 3 when it is mounted on the test bench 1 for testing. Furthermore, the radial direction is preferably related to the rotation axis 5, and preferably describes a direction pointing away from (i.e., radially outward) or toward (i.e., radially inward) the rotation axis 5 within a plane perpendicular to the rotation axis 5. The term "axial direction" is also used in the context of this invention. The axial direction preferably refers to the assembly state of the rotor 3 when it is mounted on the test bench 1 for testing. Furthermore, the axial direction is preferably related to the rotation axis 5, and preferably describes a direction extending parallel to the rotation axis 5. The term "surrounding" is also used in the context of this invention. Surrounding preferably refers to the assembly state of the rotor 3 when it is mounted on the test bench 1 for testing. Furthermore, surrounding is preferably related to the rotation axis 5, and preferably describes an arrangement and / or construction method surrounding the rotation axis 5. Additionally, the terms "connected state," "inserted state," and similar states are used in the context of this invention, wherein preferably at least the directly involved components are in the corresponding states. Therefore, for example, when the first component and the second component are in a connected state, the first component and the second component are connected to each other. For example, when the relationship between the first component and the second component is in an inserted state, the first component is inserted into the second component, and the first component and the second component are preferably connected to each other initially without relative rotation about the rotation axis 5.

[0059] Another aspect of the invention is the first receiving unit 11 already described for the receiving system 9. Unless otherwise explicitly stated, the features, technical effects, and / or advantages already described also apply to the first receiving unit 11 in at least a similar manner. Thus, the first receiving unit 11 has a surrounding first connecting section 15, a surrounding second connecting section 17, and a surrounding intermediate section 19 extending from the first connecting section 15 to the second connecting section 17. Another aspect of the invention is the second receiving unit 13 already described for the receiving system 9. Unless otherwise explicitly stated, the features, technical effects, and / or advantages already described also apply to the second receiving unit 13 in at least a similar manner. Thus, the second receiving unit 13 has a surrounding first connecting section 21, a surrounding second connecting section 23, and a surrounding intermediate section 25 extending from the first connecting section 21 to the second connecting section 23.

[0060] It should be further noted that "having" does not exclude other elements or steps, and "a" does not exclude multiple. Furthermore, it should be noted that the features described with reference to the above embodiments can also be used in combination with other features of the other embodiments described above. Reference numerals in the claims are not to be considered limiting.

[0061] List of reference numerals

[0062] 1 test stand

[0063] 3 rotors

[0064] 5. Rotation axis

[0065] 7. Test bench frame

[0066] 9. Admission System

[0067] 11 First Reception Unit

[0068] 13 Second Reception Unit

[0069] 15 First connecting section of the first receiving unit

[0070] 17. Second connecting section of the first receiving unit

[0071] 19 The middle section of the first receiving unit

[0072] 21. First connecting section of the second receiving unit

[0073] 23 The second connecting section of the second receiving unit

[0074] 25 The middle section of the second receiving unit

[0075] 27 The contact surface of the first connecting section of the first receiving unit

[0076] 29. Rotor contact surface

[0077] 31 slots

[0078] 33 The contact surface of the second connecting section of the first receiving unit

[0079] The contact surface of the section of the 35 test bench

[0080] Section of 37 test benches

[0081] 39 The contact surface of the first connecting section of the second receiving unit

[0082] 41 Rotor contact surface

[0083] 43 The contact surface of the second connecting section of the second receiving unit

[0084] 45 The contact surface of the second connecting section of the first receiving unit

[0085] 47 First side of the first receiving unit

[0086] 49 The contact surface of the second connecting section of the first receiving unit

[0087] 51 The second side of the first receiving unit

[0088] 53 The contact surface of the first connecting section of the first receiving unit

[0089] 55 holes

[0090] 57 screws

[0091] 59 balance holes

[0092] 61 Press-fit Hole

[0093] 63 clamping ring

[0094] 65 centering rings

[0095] 67. The contact surface of the centering ring

[0096] 69 The first side of the second receiving unit

[0097] 71 The contact surface of the second connecting section of the second receiving unit

[0098] 73 The second side of the second receiving unit

[0099] 75 The contact surface of the first connecting section of the second receiving unit

Claims

1. A receiving system (9) for receiving a unit, wherein, The unit is supported on the frame (7) of the device in the received state in a manner that allows it to rotate about the rotation axis (5). The receiving system (9) has a first receiving unit (11) and a second receiving unit (13). The first receiving unit (11) has a surrounding first connecting section (15), a surrounding second connecting section (17), and a surrounding intermediate section (19) extending from the first connecting section (15) to the second connecting section (17). The second receiving unit (13) has a surrounding first connecting section (21), a surrounding second connecting section (23), and a surrounding intermediate section (25) extending from the first connecting section (21) to the second connecting section (23). The second connecting section (17) of the first receiving unit (11) has at least a segmented, radially outwardly pointing abutment surface (33), which is configured such that, in the inserted state, it forms a clearance fit with the at least segmented, radially inwardly pointing abutment surface of the section of the device. The second connecting section (23) of the second receiving unit (13) has at least a segmented surrounding and radially outwardly pointing abutment surface (43), which is configured to form an interference fit with at least a segmented surrounding and radially inwardly pointing abutment surface (45) of the second connecting section (17) of the first receiving unit (11) in the connected state, thereby causing at least one segment of the second connecting section (17) of the first receiving unit (11) to deform radially outwardly, so that the at least segmented surrounding and radially outwardly pointing abutment surface (33) of the second connecting section (17) of the first receiving unit (11) is forcefully connected to the at least segmented surrounding and radially inwardly pointing abutment surface of the section of the device.

2. The receiving system (9) according to the preceding claim, wherein, The first connecting section (15) of the first receiving unit (11) has at least a segmented surrounding and radially inwardly pointing abutment surface (27), which is configured to forcefully engage with the at least segmented surrounding and radially outwardly pointing abutment surface (29) of the unit in the connected state.

3. The receiving system (9) according to any one of the preceding claims, wherein, The first connecting section (21) of the second receiving unit (13) has at least a segmented surrounding and radially inwardly pointing abutment surface (39), which is configured such that it forms a clearance fit with the at least segmented surrounding and radially outwardly pointing abutment surface (41) of the unit in the connected state.

4. The receiving system (9) according to any one of the preceding claims, wherein, The first connecting section (15) of the first receiving unit (11) has at least a segmented surrounding and radially outward-opening slot (31).

5. The receiving system (9) according to any one of the preceding claims, wherein, The first connecting section (15) of the first receiving unit (11) is connected to the section (37) of the device in the connected state, which is supported in a manner that allows it to rotate about the rotation axis (5).

6. The receiving system (9) according to any one of the preceding claims, wherein, The first connecting section (21) of the second receiving unit (13) has at least a segmented surrounding and radially inwardly pointing abutment surface (39), which is configured such that it can be forcefully connected to the at least segmented surrounding and radially outwardly pointing abutment surface (41) of the unit in the connected state.

7. The receiving system (9) according to any one of the preceding claims, wherein, The at least segmented surrounding and radially outward pointing abutment surface (33) of the second connecting section (17) of the first receiving unit (11) forms a clearance fit in the inserted state. The at least segmented surrounding and radially inward pointing abutment surface of the device is the abutment surface (35) of the section (37) of the device that is supported in a manner that allows it to rotate about the rotation axis (5). Alternatively, the receiving system (9) has a centering ring (65) having at least a segmented surrounding and radially inward pointing abutment surface (67) that forms a clearance fit with the at least segmented surrounding and radially outward pointing abutment surface (33) of the second connecting section (17) of the first receiving unit (11) in the inserted state.

8. A first receiving unit (11) for a receiving system (9) according to any one of the preceding claims, wherein, The first receiving unit (11) has a surrounding first connecting section (15), a surrounding second connecting section (17), and a surrounding intermediate section (19) extending from the first connecting section (15) to the second connecting section (17).

9. A second receiving unit (13) for use in the receiving system (9) according to any one of the preceding claims, wherein, The second receiving unit (13) has a surrounding first connecting section (21), a surrounding second connecting section (23), and a surrounding intermediate section (25) extending from the first connecting section (21) to the second connecting section (23).

10. A device for receiving a cell, wherein, The unit is supported on the frame (7) of the device in the receiving state in a manner that allows it to rotate about the rotation axis (5), wherein the device has a receiving system (9) according to any one of claims 1 to 7.

Images