Lubrication pump for inter-axle differential

Details Lubrication pump for inter-axle differential Lubrication pump for inter-axle differential

2006-02-14

2006-02-14

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

With lubricaton

For differential planetary gearing

Reexamination Certificate

active

06997841

ABSTRACT:
An inter-axle differential assembly comprises an input shaft, an output shaft arranged coaxially with respect to each other, differential gearing and a dedicated reversible lubrication pump disposed between the input and output shafts. The reversible gerotor type lubrication pump includes a rotor driven by the input shaft, and an impeller, both disposed within a pump body coupled to a side gear drivingly connected to the output shaft. Thus, the lubrication pump generates lubricant flow only during the differential action between the input shaft and the output shaft, i.e. only when needed and at a flow rate proportional to the speed difference across the differential assembly. An oil flow generated by the lubrication pump is supplied to various components of the inter-axle differential assembly through a gallery of fluid passages.

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