Loader for civil engineering works has hydraulic control circuit and cam mechanism to keep bucket level as it is raised

摘要

The loader (1), consisting of a chassis (5) and a bucket controlled by arms (3) and levers (20, 21) forming an articulated parallelogram mechanism, and hydraulic power cylinders, has a hydraulic control circuit for the bucket power cylinder and a cam mechanism which prevent the bucket from tipping backwards as it is being raised, regardless of any manipulations carried out by the driver. The hydraulic circuit acts on the cam mechanism to maintain the bucket in a level position as it is raised.