US 7,828,309 B2 · Road-building machine

Abstract

The invention relates to a road-building machine whose left front wheel (4) or caterpillar, right front wheel (6) or caterpillar, left rear wheel (8) or caterpillar and right rear wheel (10) or caterpillar are connected to the road-building machine chassis by means of an actuating element and are height-adjustable with respect to the road-building machine frame. According to said invention, different actuating elements are rigidly connected to the road-building machine chassis and forcedly coupled to each other in such a way that the left front wheel (4) or caterpillar and the right rear wheel (10) or caterpillar are height-adjustable in the same direction and with respect to the right front wheel (6) or caterpillar and the left rear wheel (8) or caterpillar are adjustable in the opposite directions. The all wheels (4, 6, 8, 10) or caterpillars are equally height-adjustable. The inventive road-building machine provides a high operational stability, the improved compensation of the adjustment of lateral hindrance inclination of the road-building machine and the irregularities in the longitudinal direction thereof.

Claims37

Dependent claims

A road-building machine, of which a left front wheel or caterpillar, right front wheel or caterpillar, left rear wheel or caterpillar and right rear wheel or caterpillar is connected to a chassis of the road-building machine by means of an actuating member and is adjustable in height with respect to a frame of the road-building machine, the individual actuating members being connected rigidly to the chassis and being positively coupled to one another in such a way that the left front wheel or caterpillar and the right rear wheel or caterpillar can be adjusted in height in the same direction and in the opposite direction to the right front wheel or caterpillar and the left rear wheel or caterpillar, and the actuating members being designed as double-acting working cylinders with a first and a second working chamber which are filled with a pressure medium, the working cylinders being connected to one another via coupling lines.

A road-building machine, comprising:

a chassis having a forward direction;
a left front wheel or caterpillar;
a right front wheel or caterpillar;
a left rear wheel or caterpillar;
a right rear wheel or caterpillar;
a first working cylinder rigidly connected to the chassis and connected to the left front wheel or caterpillar for adjusting a height of the left front wheel or caterpillar relative to the chassis;
a second working cylinder rigidly connected to the chassis and connected to the right front wheel or caterpillar for adjusting a height of the right front wheel or caterpillar relative to the chassis;
a third working cylinder rigidly connected to the chassis and connected to the left rear wheel or caterpillar for adjusting a height of the left rear wheel or caterpillar relative to the chassis;
a fourth working cylinder rigidly connected to the chassis and connected to the right rear wheel or caterpillar for adjusting a height of the right rear wheel or caterpillar relative to the chassis;
a rotating working roller or rotor supported from the chassis between the front wheels or caterpillars and the rear wheels or caterpillars and extending transversely to the forward direction;
each of the working cylinders including at least one working chamber filled with a pressure medium;
and
coupling lines connecting the working cylinders to one another and providing a positive hydraulic coupling between the working cylinders in such a way that the left front wheel or caterpillar and the right rear wheel or caterpillar are adjusted in height in the same direction and in the opposite direction to the right front wheel or caterpillar and the left rear wheel or caterpillar.

10 more elements

Dependencies are inferred from the claim text.

Road-building machine

Life of this patent

Road-building machine

Life of this patent

Abstract

Claims37