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US 2015/0057119 A1Published application
Cost Configurable Hystat Drive System
AssigneeCaterpillar Inc.
InventorEvan Earl Jacobson
Life of this patent
Estimating the term…
Abstract
A cost configurable drive system for machines having dual/tandem axle drive systems employs a split hystat power system. The system performance can be easily adjusted by the removal or installation of a planetary gear set and a clutch box. In this way, the system is configurable with components removed or substituted to allow for a less capable but lower cost offering, while allowing for very simple upgrade to a fully capable system.
Claims20
A hydrostatically powered machine comprising:
- a front set of ground engaging elements proximal to and supporting a front portion of the machine;
- a rear set of ground engaging elements proximal to and supporting a rear portion of the machine;
- at least one hydraulic pump;
- and
- a plurality of hydraulic motors selectively linked to the at least one hydraulic pump, the plurality of hydraulic motors including a front hydraulic motor configured to drive the front set of ground engaging elements and a rear hydraulic motor configured to drive the rear set of ground engaging elements, wherein the front hydraulic motor and the rear hydraulic motor are selectively mechanically linkable to one another.
2 more elements
A hydrostatic power system comprising:
- at least one hydraulic pump;
- and
- a plurality of hydraulic motors selectively linked to the at least one hydraulic pump, the plurality of hydraulic motors including a first hydraulic motor configured to drive a first set of ground engaging elements via a first output shaft and a second hydraulic motor configured to drive a second set of ground engaging elements via a second output shaft, wherein the first output shaft and the second output shaft are selectively mechanically linkable to one another.
A split hydrostatic drive system comprising:
- a first set of ground engaging elements and a second set of ground engaging elements, each set of ground engaging elements including a plurality of ground engaging elements;
- a first output shaft linked to the first set of ground engaging elements and a second output shaft linked to the second set of ground engaging elements, the first output shaft and second output shaft being selectively linkable via a clutch;
- a first hydraulic motor configured to drive the first output shaft via a planetary gear set;
- a second hydraulic motor configured to drive the second output shaft via a pinion and spur gear set;
- and
- at least one hydraulic pump configured to supply hydraulic fluid to the first hydraulic motor and the second hydraulic motor.
3 more elements
Dependencies are inferred from the claim text.