초록 ▼

An off-highway earth-moving vehicle of the scraper type which includes a tractor section and scraper section interconnected by a draft frame providing rolling rigidity, each section having a pair of ground-engaging wheels. A floating axle assembly is provided on the tractor section permitting indepe

An off-highway earth-moving vehicle of the scraper type which includes a tractor section and scraper section interconnected by a draft frame providing rolling rigidity, each section having a pair of ground-engaging wheels. A floating axle assembly is provided on the tractor section permitting independent movement of the tractor wheels in the following of ground contours. The scraper section is driven by a prime mover having a torque converter for coupling to the rear axle. The prime mover, in addition, drives an AC synchronous generator which is electrically connected to an induction motor in the tractor section. The motor in turn is drivingly coupled, via a second torque converter, to the tractor wheels. The sections of the vehicle are so proportioned in size and weight that the weight applied to the scraper wheels under both loaded and unloaded conditions is approximately twice the weight applied to the tractor wheels and the drive systems in the sections are so proportioned that at normal operating engine r.p.m. the power supplied to the scraper wheels is approximately twice the power provided by the motor to the tractor wheels. This is preferably accomplished by using torque converters having respective maximum horsepower output ratings at an input speed corresponding to normal operating prime mover r.p.m. which substantially total the maximum rated horsepower produced at such r.p.m. and which bear a ratio to one another on the general order of 2:1.

대표청구항 ▼

In an off-highway earth-moving vehicle of the scraper type, the combination comprising, a tractor section and a scraper section, the scraper section having a scraper blade and a bowl, each section having a pair of ground-engaging wheels, a draft frame providing rolling rigidity interposed between th

In an off-highway earth-moving vehicle of the scraper type, the combination comprising, a tractor section and a scraper section, the scraper section having a scraper blade and a bowl, each section having a pair of ground-engaging wheels, a draft frame providing rolling rigidity interposed between the sections, the tractor section having an axle assembly mounting the associated wheels and which is floatingly supported with respect to the tractor section to permit independent movement of the assembly in the following of ground contours, the sections of the vehicle being so proportioned in size and weight that the weight applied to the scraper wheels under both loaded and unloaded conditions is approximately twice the weight applied to the tractor wheels, a prime mover in the scraper section having a torque converter for coupling to the scraper wheels and having a generator, means for governing the prime mover for operation at a normal operating r.p.m., a motor in the tractor having a torque converter for coupling to the tractor wheels, the generator and motor being synchronously linked so that the motor continuously operates at a speed which is substantially proportional to that of the prime mover, the scraper and tractor torque converters having respective maximum horsepower output ratings at input speeds corresponding to normal operating prime mover r.p.m. which substantially total the maximum rated horsepower produced at such r.p.m. and which bear a ratio to one another on the general order of 2:1.