Blower Motor
AssigneeJohnson Electric S.A.
InventorsKwong Yip Poon, Siu Chun Tam
Life of this patent
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Abstract
An oil seal arrangement for an electric motor, especially a bypass blower motor assembly has an oil seal protecting a shaft bearing 16 and sealing the shaft aperture between a motor part and a blower part. The oil seal 19 has two lips 25, 28 contacting the shaft 15 at two spaced locations forming a grease chamber 26 therebetween. The volume of the grease chamber 26 is enlarged by a groove 27 in the shaft 15 between the lips 25, 28 of the oil seal 19.
Claims4
An electric motor having a rotor including a shaft, a stator, bearings associated with the stator supporting the shaft, and an oil seal associated with one of the bearings,
- said oil seal contacting the shaft at two axially spaced locations and forming a cavity for lubricating grease,
- wherein the shaft has a groove located between said spaced locations to increase the volume of the cavity.
4 The electric motor of claim 3 wherein the cavity is an annular space formed between the shaft and the two lips of the oil seal.
Dependencies are inferred from the claim text.