An electric vehicle drive assembly 12, comprising: a housing 16 defining a cavity 18 to house the electric drive unit motor 14; and a breather spigot 20, extending through the housing 16, having a bore 22 in fluid communication with the cavity 18. The breather may extend into the cavity, perhaps by 2 to 4mm, and may have an end portion which is circumferentially discontinuous (24, Fig. 2). A portion 26 of the first cavity may surround a stator end winding 28, and the spigot may extend into that cavity portion 26, perhaps with a minimum distance of at least 5 mm between the breather and the stator end winding. The breather may have a bore 22 diameter of 3 to 5mm, and may be sealed to the housing using an o-ring 30 or sealant. A powertrain assembly 10 may comprise: an electric drive assembly 12 with a motor 14 and a breather 20; a transmission 32; and a second housing 34 defining a second cavity 36 to house the transmission. There may be oil spray outlets 44 or nozzles in the second cavity for the transmission.
Electric drive unit assembly
2025-06-11
Patent
Electronic Resource
English