Patent ID: 9243382
Filing Date: 2016-01-26
CPC Classification: E02F

Claim Text:
1. A ripper device for a motor grader, comprising: a ripper bracket configured to be attached to a rear end face of the body of a motor grader, the ripper bracket including a pair of lower shaft supports disposed at lower portions of left and right sides of the ripper bracket; a single ripper cylinder configured to raise and lower tooth members, the ripper cylinder having a head at one end and a bottom part at an opposite end; a frame component rotatably attached at a front end to the lower shaft supports of the ripper bracket, the frame component having a frame bracket connected to the ripper cylinder in a state in which the head of the ripper cylinder is able to rotate, the frame bracket being disposed in a widthwise middle part of the frame component near the ripper bracket; a pair of ripper links attached to the ripper bracket such that front ends of the ripper links are able to rotate with respect to the left and right sides of an upper part of the ripper bracket; a pair of tooth brackets, to a lower end of which the tooth members are attached, and whose lower end is connected to a rear end of the frame component at both ends of the frame component in a width direction of the frame component, and whose upper end is connected to rear ends of the pair of ripper links, with the upper and lower ends of the tooth brackets both able to rotate with respect to the frame component and the ripper links; and a cylinder attachment bracket having a cylinder attachment shaft to which the bottom part of the ripper cylinder is connected in a rotatable state in a middle part in the width direction of the motor grader, the cylinder attachment bracket being provided between the pair of tooth brackets, the cylinder attachment shaft of the ripper cylinder being disposed coaxially with rotational shafts of the pair of ripper links and the pair of tooth brackets, the cylinder attachment shaft being separate and spaced apart from the rotational shafts of the pair of ripper links and the pair of tooth brackets, a rotational shaft of the frame bracket with respect to the head of the ripper cylinder being disposed coaxially with the pair of lower shaft supports of the ripper bracket, the rotational shaft of the frame bracket with respect to the head of the ripper cylinder being separate and spaced apart from the lower shaft supports, and the ripper cylinder being disposed along a diagonal line of a parallelogram formed by the tooth brackets, the pair of ripper links, the frame component, and the ripper bracket in side view.