Apparatus for manufacturing rotor shafts for electric motors

Abstract

The invention relates to an apparatus for manufacturing rotor shafts for electric motors, the apparatus comprising a storage unit for storing semi-finished products, at least one machining station for machining semi-finished products, and a transport system for transporting semi-finished products from the storage unit to the at least one machining station. The transport system comprises: two longitudinal rails extending parallel to one another and offset relative to one another in a longitudinal direction; a transverse rail extending in a transverse direction; and a manipulator for picking up semi-finished products and rotor shafts. The manipulator can be moved along the transverse rail in the transverse direction, and the transverse rail can be moved along the longitudinal rails in the longitudinal direction.

Description

[0001] Device for manufacturing rotor shafts for electric motors

[0002] Description:

[0003] The invention relates to a device for manufacturing rotor shafts for electric motors, which comprises a bearing for storing semi-finished products, at least one machining station for machining semi-finished products and a transport system for transporting semi-finished products from the bearing to the at least one machining station.

[0004] From DE 102022001 424 A1, an electric motor with a rotor is known. The rotor comprises a laminated core and a rotor shaft inserted into the laminated core. The rotor shaft is approximately rotationally symmetrical. The laminated core consists of individual laminations stacked axially. Each individual lamination has a central bore for receiving the rotor shaft.

[0005] The rotor is installed in an electric motor, which also includes a stator. The rotor can rotate around an axis of rotation relative to the stator. For this to work, the laminated core and the rotor shaft must be rigidly connected to each other, and the axis of rotation must run centrally through the rotor.

[0006] The invention is based on the objective of providing a device for manufacturing rotor shafts for electric motors.

[0007] The problem is solved by a device for manufacturing rotor shafts for electric motors with the features specified in claim 1. Advantageous embodiments and further developments are the subject of the dependent claims.

[0008] An apparatus according to the invention for manufacturing rotor shafts for electric motors comprises a bearing for storing semi-finished products, at least one machining station for machining semi-finished products, and a transport system for transporting semi-finished products from the bearing to the at least one machining station. The transport system has two longitudinal rails extending parallel to each other and offset in a longitudinal direction, a transverse rail extending in a transverse direction, and a manipulator for receiving semi-finished products and rotor shafts. The manipulator is movable in the transverse direction along the transverse rail, and the transverse rail is movable in the longitudinal direction along the longitudinal rails.

[0009] ISI \ EIDOPAT 20.10.2025 The device according to the invention enables the automated production of rotor shafts for electric motors. In particular, automated transport of the semi-finished product from the storage area to the at least one processing station is enabled, without requiring any manual work steps. At the processing station, rotor shafts for electric motors are manufactured from the semi-finished product.

[0010] According to an advantageous embodiment of the invention, the manipulator has a gripping arm which is movable in a vertical direction relative to the transverse rail, and at least one gripping element which is arranged at one end of the gripping arm facing away from the transverse rail.

[0011] The transverse direction runs perpendicular to the longitudinal direction. The vertical direction is perpendicular to a flat surface and runs perpendicular to both the longitudinal and transverse directions. The gripping element is therefore positioned facing the ground.

[0012] According to an advantageous embodiment of the invention, the at least one gripping element is designed as a magnetic gripper.

[0013] The magnetic gripper advantageously includes an electromagnet. When current is applied, the electromagnet is activated and picks up a semi-finished product or a rotor shaft made of ferromagnetic material. When the current is removed, the semi-finished product or rotor shaft is released.

[0014] According to an advantageous embodiment of the invention, the manipulator has an optical detection unit for detecting semi-finished products as well as rotor shafts.

[0015] The manipulator is therefore able to grip semi-finished products and rotor shafts without contact. This allows the gripper arm with the gripping element to be positioned to pick up a semi-finished product or a rotor shaft.

[0016] According to an advantageous embodiment of the invention, the manipulator comprises running wheels for rolling on the transverse rail, which are rotatable relative to the transverse rail, a traction motor for driving at least one of the running wheels, a receiving unit for inductive energy absorption and an electrical energy storage device for storing absorbed energy.

[0017] The receiving unit enables contactless and wear-free energy transfer from a linear conductor cable attached to the cross rail to the manipulator. The electrical energy storage device allows for intermediate energy storage. If the manipulator requires a high power output for a short period, for example during acceleration, the necessary electrical energy is partially drawn from the electrical energy storage device. Therefore, only a small amount of power needs to be transferred to the manipulator via the receiving unit. The power transferred via the receiving unit only needs to be sufficient to move the manipulator smoothly along the cross rail and simultaneously charge the electrical energy storage device.

[0018] According to an advantageous embodiment of the invention, the transport system comprises at least one transfer station for the intermediate storage of semi-finished products and rotor shafts, which is arranged transversely between the longitudinal rails and vertically below the transverse rail. The manipulator is configured to pick up semi-finished products and rotor shafts at the transfer station and to deposit them there.

[0019] According to an advantageous embodiment of the invention, the transport system comprises a longitudinally extending guide rail and a rail vehicle which is movable along the guide rail in the longitudinal direction from the storage area to a transfer station. The rail vehicle comprises a base body and a receiving device, and the receiving device is configured to receive semi-finished products in the storage area and deposit them at a transfer station.

[0020] At the transfer station, the manipulator picks up the semi-finished product placed there in order to transport it to the processing station.

[0021] According to an advantageous embodiment of the invention, the receiving device is movable in a vertical direction relative to the base body and pivotable about a pivot axis relative to the base body.

[0022] Thus, the semi-finished product can be moved from the storage to the transfer station at the desired height and orientation. According to an advantageous embodiment of the invention, the rail vehicle comprises running wheels for rolling on the running rail, which are rotatable relative to the base body, a traction motor for driving at least one of the running wheels, a receiving unit for inductive energy absorption, and an electrical energy storage device for storing absorbed energy.

[0023] The receiving unit enables contactless and wear-free energy transfer from a line conductor cable attached to the track to the rail vehicle. The electrical energy storage unit allows for intermediate energy storage. If the rail vehicle requires a high power output for a short period, for example during acceleration, some of the necessary electrical energy is drawn from the electrical energy storage unit. Therefore, only a small amount of power needs to be transferred to the rail vehicle via the receiving unit. The power transferred via the receiving unit only needs to be sufficient to move the rail vehicle smoothly along the track and simultaneously charge the electrical energy storage unit.

[0024] According to an advantageous embodiment of the invention, the at least one processing station comprises a sawing unit for sawing a semi-finished product, a turning unit for turning a semi-finished product and a milling unit for milling a semi-finished product.

[0025] The machining station is thus capable of cutting a semi-finished product, in particular a solid round profile, to the desired length, turning it down to the desired diameter, and milling in the necessary grooves. The machining station is therefore equipped to process the semi-finished product into a rotor shaft.

[0026] According to an advantageous embodiment of the invention, the device comprises a plurality of processing stations arranged transversely between the longitudinal rails and vertically below the transverse rail. The manipulator is configured to deposit semi-finished products at the processing stations and to receive rotor shafts at the processing stations.

[0027] The invention is not limited to the combination of features stated in the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will arise, particularly from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to the figures. The invention is not limited to the embodiments shown in the figures. The figures represent the subject matter of the invention only schematically. They show:

[0028] Figure 1: a top view of a device for manufacturing rotor shafts,

[0029] Figure 2: a side view of part of a transport system and

[0030] Figure 3: a side view of a manipulator.

[0031] Figure 1 shows a top view of a device for manufacturing rotor shafts for electric motors. An electric motor rotor comprises a laminated core and a rotor shaft. The rotor shaft is inserted into the laminated core. The rotor shaft and the laminated core are positively and rotationally fixedly connected to form the rotor. The rotor shaft is approximately rotationally symmetrical.

[0032] The device for manufacturing rotor shafts for electric motors comprises a bearing 10 for storing semi-finished products 15, a plurality of machining stations 20 for machining semi-finished products 15 and a transport system for transporting semi-finished products 15 from the bearing 10 to the machining stations 20.

[0033] The 20 processing stations are located on a level floor within a technical facility and are arranged offset from each other in a transverse direction Y and a longitudinal direction X. The transverse direction Y runs perpendicular to the longitudinal direction X. A vertical direction Z is perpendicular to the level floor and runs perpendicular to both the longitudinal direction X and the transverse direction Y.

[0034] The processing stations 20 each have a sawing unit for sawing a semi-finished product 15, a turning unit for turning a semi-finished product 15, and a milling unit for milling a semi-finished product 15. The semi-finished product 15 is, in particular, a solid round profile. The processing station is thus able to cut a semi-finished product 15 to the desired length, turn it down to the desired diameter, and mill the necessary grooves. The processing station is thus configured to process the semi-finished product 15 into a rotor shaft. The transport system has a first longitudinal rail 31 and two longitudinal rails 32. The longitudinal rails 31 and 32 run parallel to each other, offset from one another, in the longitudinal direction X. The transport system also has a transverse rail 33 running in the transverse direction Y. The transverse rail 33 is movable along the longitudinal rails 31 and 32 in the longitudinal direction X.

[0035] The transport system comprises a plurality of transfer stations 40. The transfer stations 40 serve for the intermediate storage of semi-finished products 15 and rotor shafts. The transfer stations 40 are arranged in the transverse direction Y between the longitudinal rails 31, 32 and in the vertical direction Z below the transverse rail 33. The processing stations 20 are also arranged in the transverse direction Y between the longitudinal rails 31, 32 and in the vertical direction Z below the transverse rail 33.

[0036] The transport system includes a manipulator 50 for receiving semi-finished products 15 and rotor shafts. The manipulator 50 is movable along the transverse rail 33 in the transverse direction Y. By moving the manipulator 50 along the transverse rail 33 in the transverse direction Y, in combination with moving the transverse rail 33 along the longitudinal rails 31, 32 in the longitudinal direction X, the manipulator 50 is able to reach all processing stations 20 and all transfer stations 40.

[0037] In particular, the manipulator 50 is able to pick up semi-finished products 15 at the transfer stations 40, to place semi-finished products 15 at the processing stations 20, to pick up rotor shafts at the processing stations 20 and to place rotor shafts at the transfer stations 40.

[0038] The transport system has a guide rail 42 extending in the longitudinal direction X. The guide rail 42 thus runs parallel to the longitudinal rails 31, 32. The guide rail 42 is arranged in the vertical direction Z above the longitudinal rails 31, 32 and above the transverse rail 33.

[0039] The transport system also includes a rail vehicle (not shown here). The rail vehicle is movable along the guide rail 42 in the longitudinal direction X from the bearing 10 to the transfer stations 40. The rail vehicle has a base and wheels for rolling on the guide rail 42. The wheels are rotatable relative to the base and relative to the guide rail 42. The rail vehicle also includes a traction motor for driving the wheels, a receiver unit for inductive energy absorption, and an electrical energy storage device for storing the absorbed energy. The transport system has a line conductor cable attached to the guide rail. Energy can be transmitted from the line conductor cable to the receiver unit without contact or wear.

[0040] The rail vehicle includes a receiving device for receiving semi-finished products 15. The receiving device is movable relative to the base body in the vertical direction Z and pivotable relative to the base body about a pivot axis. The receiving device is thus configured to receive semi-finished products 15 in the storage area 10 and to deposit them at one of the transfer stations 40.

[0041] Figure 2 shows a side view of part of the transport system. Only the manipulator 50, the first longitudinal rail 31, and the transverse rail 33 are shown. The second longitudinal rail 32 is obscured by the first longitudinal rail 31. The longitudinal rails 31 and 32 rest on columns 35 and are spaced vertically Z from the floor.

[0042] Figure 3 shows a side view of the manipulator 50. The manipulator 50 is designed to receive semi-finished products 15 at the transfer stations 40, to place semi-finished products 15 at the processing stations 20, to receive rotor shafts at the processing stations 20, and to place rotor shafts at the transfer stations 40.

[0043] The manipulator 50 includes wheels for rolling on the cross rail 33. The wheels are rotatable relative to the cross rail 33. The manipulator 50 also includes a traction motor for driving the wheels, a receiver unit for inductive energy absorption, and an electrical energy storage device for storing the absorbed energy. The transport system has a line conductor cable attached to the cross rail 33. Energy can be transferred from the line conductor cable to the receiver unit without contact or wear.

[0044] The manipulator 50 has a gripping arm 52. The gripping arm 52 is movable in the vertical direction Z relative to the transverse rail 33. The manipulator 50 has two gripping elements 54, which are arranged at one end of the gripping arm 52 opposite the transverse rail 33. The gripping elements 54 are arranged offset from each other in the longitudinal direction X. The gripping elements 54 are designed as magnetic grippers. In the illustration shown here, a semi-finished product 15 is held by the gripping elements 54. The manipulator 50 also has an optical detection unit 56 for detecting semi-finished product 15 and rotor shafts. Reference numeral list

[0045] 10 warehouses

[0046] 15 semi-finished products

[0047] 20 processing stations

[0048] 31 first longitudinal rail

[0049] 32 second longitudinal rail

[0050] 33 Crossbar

[0051] 35 pillar

[0052] 40 Transfer station

[0053] 42 Running rail

[0054] 50 Manipulator

[0055] 52 Gripper arm

[0056] 54 Gripping element

[0057] 56 optical detection unit X longitudinal direction

[0058] Y transverse direction

[0059] Z Vertical direction

Claims

Patent claims:

1. Device for manufacturing rotor shafts for electric motors, comprising a warehouse (10) for storing semi-finished products (15), at least one processing station (20) for processing semi-finished products (15) and a transport system for transporting semi-finished products (15) from the warehouse (10) to the at least one processing station (20), characterized by the fact that the transport system two longitudinal rails (31, 32) running parallel to each other in a longitudinal direction (X), a transverse rail (33) running in a transverse direction (Y) and a manipulator (50) for receiving semi-finished products (15) and rotor shafts, and that the manipulator (50) is movable along the transverse rail (33) in the transverse direction (Y), and that the transverse rail (33) is movable along the longitudinal rails (31, 32) in the longitudinal direction (X).

2. Device according to claim 1, characterized in that the manipulator (50) has a gripping arm (52) which is movable in a vertical direction (Z) relative to the cross rail (33), and has at least one gripping element (54) which is arranged at one end of the gripping arm (52) facing away from the transverse rail (33).

3. Device according to claim 2, characterized in that that at least one gripping element (54) is designed as a magnetic gripper.

4. Device according to one of the preceding claims, characterized in that the manipulator (50) has an optical detection unit (56) for detecting semi-finished products (15) and rotor shafts.

5. Device according to one of the preceding claims, characterized in that the manipulator (50) has running wheels for rolling on the transverse rail (33), which are rotatable relative to the transverse rail (33), a traction motor to drive at least one of the wheels, a receiving unit for the inductive absorption of energy and It includes an electrical energy storage device for storing absorbed energy.

6. Device according to one of the preceding claims, characterized in that the transport system comprises at least one transfer station (40) for intermediate storage of semi-finished products (15) and rotor shafts, which is arranged in a transverse direction (Y) between the longitudinal rails (31, 32) and in a vertical direction (Z) below the transverse rail (33), and that the manipulator (50) is set up to receive semi-finished products (15) and rotor shafts at the transfer station (40) and to deposit them at the transfer station (40).

7. Device according to one of the preceding claims, characterized in that the transport system has a longitudinally extending guide rail (42) and a rail vehicle which is movable along the running rail (42) in the longitudinal direction (X) from the bearing (10) to a transfer station (40), and that the rail vehicle comprises a base body and a receiving device, and the receiving device is designed to receive semi-finished products (15) in the storage (10) and to deposit them at a transfer station (40).

8. Device according to claim 7, characterized in that The receiving device is movable relative to the base body in a vertical direction (Z) and pivotable relative to the base body about a pivot axis.

9. Device according to one of claims 7 to 8, characterized in that the rail vehicle running wheels for rolling on the running rail (42), which are rotatable relative to the base body, a traction motor to drive at least one of the wheels, a receiving unit for the inductive absorption of energy and It includes an electrical energy storage device for storing absorbed energy.

10. Device according to one of the preceding claims, characterized in that the at least one processing station (20) a sawing unit for sawing a semi-finished product (15), a turning unit for turning a semi-finished product (15) and a milling unit for milling a semi-finished product (15).

11. Device according to one of the preceding claims, characterized in that the device comprises a plurality of processing stations (20), which are arranged in a transverse direction (Y) between the longitudinal rails (31, 32) and in a vertical direction (Z) below the transverse rail (33), and that the manipulator (50) is set up to place semi-finished products (15) at the processing stations (20) and to pick up rotor shafts at the processing stations (20).

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