Patent ID: 11970835
Assignee: JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A grader, comprising:
a front frame;
a blade mounted on the front frame, wherein an attitude of the blade relative to the front frame is adjustable;
an actuator configured to adjust the attitude of the blade;
a traction frame connected below the front frame through a ball hinge;
a swing lever:
two swing frames, each of which has a first hinge portion, a second hinge portion, and a third hinge portion, wherein the respective second hinge portions of the two swing frames are hinged to the front frame, and the respective third hinge portions of the two swing frames are respectively hinged to both ends of the swing lever; and
a left linear drive member and a right linear drive member, wherein the respective first ends are hinged to the respective first hinge portions of the two swing frames respectively, and the respective second ends are hinged to a left end and a right end of the traction frame respectively;
a first angle detecting member configured to detect a first inclination angle (θ1) in a front and rear direction of the grader relative to a horizontal plane and a second inclination angle (θ2) in a left and right direction of the grader relative to a horizontal plane;
a blade detecting member configured to detect attitude information of the blade relative to the front frame,
wherein the blade detecting member comprises: a second angle detecting member configured to detect a rotary angle (θ3) of the blade relative to the front frame and a third angle detecting member configured to detect a swing angle (θ4) of the blade relative to the front frame, the third angle detecting member is arranged at a position where the second hinge portion of at least one of the swing frames is hinged to the front frame; and
a controller configured to obtain an actual slope angle of the blade based on the first inclination angle (θ1), the second inclination angle (θ2), the rotary angle (θ3) and the swing angle (θ4), and cause action of the actuator to adjust the attitude of the blade to a preset target slope angle when the actual slope angle is inconsistent with the preset target slope angle.