Drive unit for a mobile vehicle

Abstract

Disclosed is a drive unit for a mobile vehicle, comprising two motors whose torque is added up on a common output shaft (30). One motor can be connected to the output shaft (30) via a first step-down gear stage (28) or a second step-down gear stage (29) while the lifting volume of one motor (12) is zero and said motor (12) is separated from the joint high-pressure tube (2) when the output shaft (30) has reached a maximum speed.

Description

Drives for motor vehicles technical field The invention relates to a drive for a motor vehicle. Background technique Drives of the type described are used in particular for working machines, such as wheel loaders, motor graders or excavators. On wheel loaders, especially wheel loaders over 12 tons, the entire travel range is divided into two travel ranges, one is the working range, preferably at a speed not exceeding approximately 20 km / h, and the other is the transport range, The speed can be increased to about 40km / h. If mechanical shifting cannot be performed over the entire speed range, it is advantageous during the operating range because each mechanical shift requires time due to changing the transmission, thus extending the operating time of the wheel loader. EP0483543B1 discloses a hydraulic drive, preferably applied to a ground motor vehicle, such as a wheel loader, wherein a first axial piston hydraulic motor and a second axial piston hydraulic motor are conne...

AI Technical Summary

Problems solved by technology

In order to achieve a final speed close to 40km / h, the drive requires two hydraulic motors and at least two gearshifts, so gearshifts in the working area cannot be avoided

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