Patent ID: 12237722

DETAILED DESCRIPTION

Identical reference symbols are used for elements of the disclosure that are the same or have the same effect. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures that are necessary for the description of the respective figure. The figures merely represent exemplary embodiments of the disclosure without, however, restricting the disclosure to the exemplary embodiments shown.

FIG.1shows a plan view of a metal sheet9, from which a lamination ring10according to the prior art is punched for the removal of a laminated rotor core1. InFIG.2, a side view of the laminated rotor core1is shown, which is formed from the plurality of lamination rings10according to the prior art. Due to the assembly conditions, such as, for example, transverse interference fit, screwing, riveting and the like, the lamination rings10of the laminated rotor core1are designed as full rings. However, this means extremely high punching waste in the production of these full rings (individual cores).

FIG.3shows a schematic plan view of a lamination ring10which is formed from a plurality of circular ring segments12.FIG.4shows a schematic plan view of a metal sheet9, from which, according to the disclosure, the circular ring segments12for the lamination ring10ofFIG.3are punched out. All of the punched out circular ring segments12are identical. The lamination ring10is created from the circular ring segments12. The arrangement of the circular ring segments12enables a significantly higher utilization of the metal sheet9. It is possible, for example, to use a punching tool (not shown) with a plurality of nests, or to move the metal sheet9under the punching tool. All circular ring segments12are designed to be geometrically identical.

FIG.5shows a plan view of two lamination rings10arranged one above the other, both of which are formed from a plurality of circular ring segments12according to the disclosure. The plan view shows two segment levels. The circular ring segments12of the upper lamination ring10are identified by the dashed lines. The circular ring segments12of the lower lamination ring10are identified by the dashed-dotted lines. The passages22for the fixing means (not shown here) and the receiving openings20arranged in pairs for the permanent magnets are distributed in a rotationally symmetrical manner on each of the lamination rings10. In the embodiment shown here, each of the lamination rings10consists of five circular segments12. The upper lamination ring10is rotated by half an angular range (arc length B) of the circular segment12relative to the lower lamination ring10. FromFIG.5it can be clearly seen that, despite the rotation, the passages22of the stacked two lamination rings10consisting of the circular segments12are in alignment. Likewise, the receiving openings20for permanent magnets, arranged in pairs (not shown here), are aligned. By rotating the upper lamination ring10relative to the lower lamination ring10, the joints25between the circular segments12of the upper lamination ring10and the circular segments12of the lower lamination ring10are correspondingly rotated.

FIG.6shows a perspective view of the lamination ring10formed from a plurality of circular ring segments12according to the disclosure. The dashed lines mark one of the plurality of circular ring segments12. Likewise, the receiving openings20and the passages22, which are evenly distributed along the circumference of the lamination ring10and are arranged in pairs, can be seen.

FIG.7shows a plan view of a possible embodiment of a circular segment12according to the disclosure. Each circular segment12has a first end face14with a connection system4in the circumferential direction U. The circular segment12also has a second end face16. The first end face14has a connection system4that is formed during the punching process. A connection system6complementary to the connection system4, which is also formed during the punching process, is formed on the second end face16.

In the embodiment shown here, which should not be understood as a limitation of the disclosure, the first connection system4consists of a first connecting element51, a second connecting element52and a third connecting element53, which differ in their shape. The second connection system6consists of a first complementary connecting element71, a second complementary connecting element72and a third complementary connecting element73, which also differ in their shape. The first connecting element51interacts with the first complementary connecting element71of a subsequent circular segment12in a form-fitting manner. The second connecting element52interacts with the second complementary connecting element72of the subsequent circular segment12in a form-fitting manner. The third connecting element53interacts with the third complementary connecting element73of the subsequent circular segment12in a form-fitting manner.

Each of the circular segments12has formed punched out receiving openings20for permanent magnets and the plurality of passages22, which are arranged symmetrically around a central axis M of the circular segment12. Furthermore, the receiving openings20for permanent magnets and the plurality of passages22are arranged homogeneously along an arc length B of the circular segment12.

FIG.8shows a side view of the laminated rotor core1, which according to one embodiment is formed from a plurality of segmented lamination rings10ofFIG.5. The lamination rings10consisting of the individual circular segments12assembled according to the disclosure are stacked individually or in groups in such a way that the joints25of all the lamination rings10are aligned in the direction of an axis A of the laminated rotor core1.

FIG.9shows a side view of the laminated rotor core1, which according to a further embodiment is formed from a plurality of segmented lamination rings10ofFIG.5. The lamination rings10consisting of the circular segments12can be stacked individually or in groups. In the embodiment shown here, the lamination rings10are stacked in such a way that the joints25of all the lamination rings10of the laminated rotor core are offset from one another by half an angular amount of the circular segment12.

FIG.10shows a perspective view of an assembled laminated rotor core1. In the embodiment shown here, screws are used as fixing means23to fix the lamination rings10of the laminated rotor core1consisting of the circular segments12(seeFIG.7) to a holding disc11. By using a screw connection or riveting, the lamination rings10consisting of the circular segments12(seeFIG.7) can be used. A cylindrical rotor carrier30can be used to stack the individual lamination rings10, which merely provides a centering seat for the lamination rings10. Thus, a completely cylindrical rotor carrier30is no longer necessary for the assembly of the lamination rings10. As mentioned above, the individual lamination rings10are stacked in such a way that the passages22for the fixing means23and the receiving openings20for permanent magnets are aligned over the entire axial length of the laminated rotor core1.

FIG.11shows a sectional view of an assembled laminated rotor core1andFIG.12shows a perspective view of an assembled laminated rotor core1ofFIG.11. In the embodiment shown inFIGS.11and12, the rotor carrier30as a tubular carrier element is omitted completely and the laminated rotor core1is fastened to the holding disc11. As can be seen fromFIG.11, the fixing means23are designed as screws. The screws23run in the passages22of the stacked lamination rings10and interact with the holding disc11to fix the laminated rotor core1.

It is believed that the present disclosure and many of the advantages noted therein will be understandable from the preceding description. It will be apparent that various changes in the shape, construction and arrangement of the components can be made without departing from the disclosed subject matter. The form described is illustrative only and it is the intent of the appended claims to embrace and incorporate such changes. Accordingly, the scope of the disclosure should be limited only by the appended claims.

LIST OF REFERENCE SYMBOLS

1Laminated rotor core4Connection system51First connecting element52Second connecting element53Third connecting element6Complementary connection system71First complementary connecting element72Second complementary connecting element73Third complementary connecting element9Metal sheet10Lamination ring11Holding disc12Circular segment14First end face16Second end face20Receiving openings for permanent magnets22Passage23Fixing means25Joint30Rotor carrierA AxisB Arc lengthM Central axisU Circumferential direction