초록 ▼

In a road finished having rear and front wheel carriage units and a hydrostatic all-wheel drive, wherein in addition to rear drivable wheels, at least two front wheels are drivable with a hydrostatic single wheel drive unit which contains a speed-variable hydraulic motor, each single wheel drive uni

In a road finished having rear and front wheel carriage units and a hydrostatic all-wheel drive, wherein in addition to rear drivable wheels, at least two front wheels are drivable with a hydrostatic single wheel drive unit which contains a speed-variable hydraulic motor, each single wheel drive unit comprises a hydraulic speed-adjustable motor, a planetary gear set which drives the wheel in a gear reducing manner, and a unidirectional overriding clutch which is arranged between the hydraulic motor and the planetary gear set for either positively connecting the hydraulic motor automatically in the forward drive direction with the planetary gear set or for completely releasing the motor from the planetary gear set.

대표청구항 ▼

[ What is claimed is:] [1.] A road finisher having hydrostatic all-wheel drive, comprising:a chassis having a front and rear wheel carriage unit and means for depositing paving material onto a road surface, wherein said rear wheel carriage unit includes two rear drivable wheels and said front wheel

[ What is claimed is:] [1.] A road finisher having hydrostatic all-wheel drive, comprising:a chassis having a front and rear wheel carriage unit and means for depositing paving material onto a road surface, wherein said rear wheel carriage unit includes two rear drivable wheels and said front wheel carriage unit includes at least two front wheels driven by speed-adjustable hydraulic motors, each of said front wheels being connected to a hydrostatic single wheel drive unit which includes said speed-adjustable hydraulic motor, a planetary gear set adapted to drive said wheel in a speed reducing ratio, and a unidirectional overriding clutch arranged between said speed-adjustable hydraulic motor and said planetary gear set for either automatically and positively connecting said speed-adjustable hydraulic motor in a forward drive direction with said planetary gear set strictly depending on a first speed condition with the same running speeds of the front wheels and the hydraulic motor or for completely releasing said motor from said planetary gear set automatically depending on a second speed condition with a higher speed of said front wheels than the speed of said hydraulic motor.