HYDRO-PNEUMATIC DRIVEN AXLE SUSPENSION

摘要

A hydro-pneumatic axle spring suspension system for the driven axle of an agricultural utility vehicle, in particular for the front axle of an agricultura l tractor, is described, which contains at least one hydraulic cylinder arranged between the vehicle chas sis and axle body. The rod end chamber and the piston end chamber of the hydraulic cylin der are each connected with at least one accumulator. Furthermore a valve circuit suppli ed by a hydraulic pump is provided for the control of the level, which controls the pres sure of the accumulators as a function of the load on the axle body. To improve the operating and spring characteristics of the utility vehicle it is proposed that the mechanical and hydraulic components be designed for a spring suspension under maximum load of the axle body. The valve circuit is configured and controlled in such a way that in the accumulators an adequate pressure is constantly maintained in order to make possible a spring suspension of the axle body under all load and operating condi tions of the vehicle.