Motor vehicles – Special driving device – Portable track
Patent
1987-12-23
1989-10-17
Hill, Mitchell J.
Motor vehicles
Special driving device
Portable track
180 67, 180 2402, 280678, 280683, 280702, 305 10, 305 22, 305 24, 305 27, B60G 506, B60G 1306, B62D 5514
Patent
active
048740527
ABSTRACT:
A suspension system for the idlers and guide wheels, and related structures, of a belted track-type vehicle provides cushioning for the vehicle and components as the vehicle traverses obstacles and uneven terrain. The suspension system also provides tensioning and recoil for the endless track belt during ingestion of foreign material between the belt and the idler wheel. The suspension system includes a plurality of hydropneumatic struts connected between the vehicle frame and various belt guiding and supporting components. Most endless track machines utilize auxiliary frame assembles on each side of the main vehicle frame to support track guiding rollers, idler wheels, suspension systems, and track recoil mechanisms. These auxiliary frame assembles are bulky, heavy, and complicated and generally limit the total amount of suspension and recoil afforded to the idler wheels and track guide wheels. The subject suspension system is void of any auxiliary track frames and connects all of the suspension and recoil struts directly to the main frame. This provides considerable amount of travel for the recoil and suspension struts and provides high speed capabilities for the vehicle. Additional, the subject suspension includes a controllable lock-out of a cushion cylinder to provide a stable work platform during certain work functions of the vehicle.
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Farris Robert R.
Purcell Robert J.
Caterpillar Inc.
Hill Mitchell J.
White Claude F.
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