Patent ID: 9174488
Filing Date: 2015-11-03
Classification: B60B,B60G,B60Y,B66C,B66F

Abstract:
1. A pivoting axle system for an aerial lift vehicle including a chassis, the pivoting axle system comprising: a pair of front axles supporting a corresponding pair of front wheels; a pair of rear axles supporting a corresponding pair of rear wheels, the front and rear axles being pivotally secured to the chassis at respective pivot points, wherein the front and rear axles are selectively positionable between a transport position, where the front wheels are a first narrow distance apart from each other and the rear wheels are a second narrow distance apart from each other, and a working position, where the front wheels are a first wide distance apart from each other and the rear wheels are a second wide distance apart from each other; hydraulic cylinders connected between the chassis and each of the front and rear axles, wherein the hydraulic cylinders are connected to the chassis at positions spaced from the pivot points; a first stop member disposed on each of the hydraulic cylinders on a chassis side of each of the hydraulic cylinders; and corresponding second stop members disposed on the chassis in a facing relationship with the first stop members, wherein in the working position, the first and second stop members cooperatively prevent the hydraulic cylinders from deflection beyond a yield point.