APPARATUS PROTECTING VEHICLE WITH ACCESSORY WHEN SCRAPING EDGE OF ACCESSORY STRIKES FIXED OBJECT

摘要

Linkage apparatus attaching a vehicle and an accessory, the accessory having a scraping edge commonly used for clearing snow. The accessory may be for example a bucket on a front end loader. The linkage is formed as a non-parallelogram quadrilateral with four pivot axes. Upper and lower pivot axes attach the linkage to the accessary. When the vehicle is driven so that the scraping edge strikes an immovable object, the linkage functions so that the lower pivot axis moves in a direction toward the accessory relative to the upper pivot axis. That is, the quadrilateral linkage functions to lift the scraping edge as a heel of the accessory remains on the ground such that together the accessory is allowed to tilt up at the scraping edge and ride over the immovable object.