Three piece coolant controlled rotor shaft
AssigneeDana Tm4 Inc.
InventorsSandesh Rathnavarma Hegde, Hubert Senez, Alexandre Pare, Carl Trudel
Life of this patent
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Abstract
Systems are provided for a rotor assembly for an electric machine. In one example, a system includes a rotor shaft assembly, comprising a shaft; a shaft end cap having two co-axial concentric tracks with a trough therebetween at a first end of the shaft end cap, where the shaft end cap is coupled to the shaft via two co-axial concentric weld beads at the two co-axial concentric tracks of the shaft end cap; and a flow insert arranged in a cavity shaped by the shaft and the shaft end cap, where the flow insert is formed at least in part of plastic.
Claims20
A rotor shaft assembly, comprising:
- a shaft;
- a shaft end cap having two co-axial concentric tracks with a trough therebetween at a second end of the shaft end cap, where the shaft end cap is coupled to the shaft via two co-axial concentric weld beads at the two co-axial concentric tracks of the shaft end cap;
- and
- a flow insert arranged in a cavity shaped by the shaft and the shaft end cap, where the flow insert is formed at least in part of plastic.
A method for assembling a rotor shaft, comprising:
- inserting a flow insert into a first end of a shaft, the flow insert formed at least in part of plastic;
- aligning a shaft end cap with the flow insert via at least one protrusion of the shaft end cap that interfaces with at least one socket of the flow insert;
- welding the shaft end cap to the shaft using capacitive discharge welding, where a weld joint that couples the shaft end cap to the shaft comprises at least two co-axial and concentric annular weld beads, and where the flow insert is arranged in a cavity shaped by the shaft and the shaft end cap.
A system, comprising:
- an electric motor comprising a housing;
- a stator arranged in the housing and surrounding a rotor;
- a shaft arranged in the housing and at least partially surrounded by the rotor, wherein the shaft comprises a flow insert arranged therein, the flow insert formed at least in part of plastic;
- and
- a shaft end cap having two co-axial concentric tracks with a trough therebetween, where the shaft end cap is coupled to the shaft via two co-axial concentric weld beads at the two co-axial concentric tracks of the shaft end cap.
Dependencies are inferred from the claim text.