DAVID M. DeCHRISTOPHER,BENJAMIN C. DIEM,TODD B. PIERCE
申请号：
US13835482
公开号：
US20140262559A1
申请日:
2013.03.15
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A non-zero caster angle for the rear axle swivel caster wheels on a self-propelled agricultural harvesting machine wherein steering is accomplished by varying speed and/or direction of forward drive wheels. The non-zero caster angle may be fixed or an adjuster mechanism may be provided to allow adjustment within a range of caster angles. The adjuster mechanism incorporates a fixed portion connected to the tractor frame and a pair of rotating portions, one connected to each caster wheel which allows rotation of the caster axis in a plane parallel to the machine longitudinal axis. Also disclosed is an actuator mechanism for providing powered adjustment of the caster angle, even including a control system for active caster angle adjustment.
