Patent ID: 7832740
Filing Date: 2010-11-16
Classification: B62D,E02F

Abstract:
1. A leveling apparatus for excavator and forestry machine equipment, which is mounted between an upper swing structure and a lower frame formed on a lower driving structure including a swing bearing formed on a lower part of the upper swing structure, left and right track chassis, and a front arm and a rear arm connected to upper parts of the track chassis, to keep a horizontal level of the upper swing structure against an inclined ground, the leveling apparatus comprising: a swing bearing mounting plate mounted on a lower part of the swing bearing and including a pair of pivot support parts projecting in a downward direction of the swing bearing to support a first tilt shaft and a pair of second piston holders; a support plate fixedly installed on an upper part of the lower frame and having a pair of pivot support parts projecting to support a second tilt shaft and a pair of first piston holders; a tilt plate mounted between the swing bearing mounting plate and the support plate to be tilted, and including a pair of first pivot holders formed to project upward from one end part of a main body, a pair of second pivot holders formed to project downward from the other end of the main body radially apart from the first pivot holders, a first shaft rotatably fixing the first pivot holders and the pivot support parts of the swing bearing mounting plate to form the first tilt shaft, and a second shaft rotatably fixing the second pivot holders and the pivot support parts of the support plate to form the second tilt shaft, wherein the axis of the first tilt shaft is oriented in a different direction than the axis of the second tilt shaft; and a pair of first actuators one side of which is fixed to the tilt plate to rock the first tilt shaft during their extension and contraction, and a pair of second actuators fixed to rock one side of the swing bearing mounting plate during their extension and contraction; wherein the tilt plate includes a vertical center line crossing a center line in a length direction of the lower frame, and the respective actuators are installed to be radially apart from the vertical center line.