Operation lever and grip

摘要

Provided is an operation lever adapted to make a blade perform an action other than an up and down action by rotatably a grip around the shaft center of a lever shaft. The operation lever has a lever shaft operable back and forth, corresponding to an up and down action of a blade of a dozer unit, and a grip provided on an upper part of the lever shaft and capable of rotating in a clockwise direction and counterclockwise direction from a neutral position around a shaft center of the lever shaft by a predetermined rotation angle, corresponding to an angle action or a tilting action of the blade. The grip includes a return-to-neutral spring adapted to return the grip from a rotated position to a neutral position, and the rotation angle of the grip in the clockwise direction is set to be different from that in the counterclockwise direction.

主权项

1. An operation lever for operation of a blade of a dozer unit disposed on a construction machine, the blade being operated in an up and down action, in an angle action and in a tilting action, the angle action moving the blade to differentiate back and forth positions of longitudinal ends of the blade, the tilting action moving the blade to differentiate vertical positions of longitudinal ends of the blade, comprising:
a lever shaft including: an upper part extending upward, the upper part being located above a center portion of the lever shaft relative to a longitudinal direction of the lever shaft, the lever shaft being configured to be operable back and forth, corresponding to the up and down action of the blade; and a grip provided on the upper part of the lever shaft, the grip including:
a grip core member attached to the lever shaft, the grip core member including:
a first stopper and a second stopper; anda grip main body configured to be rotated about a shaft center of the lever shaft and being supported by the grip core member, thereby being capable of rotating in a clockwise direction and in a counterclockwise direction from a neutral position by a predetermined rotation angle, such that rotation of the grip main body is configured to cause movement of the blade in the angle action and in the tilting action, wherein the first stopper is configured to restrict the rotation of the grip main body in the counterclockwise direction from the neutral position by a first predetermined rotation angle, and the second stopper is configured to restrict the rotation of the grip main body in the clockwise direction from the neutral position by a second predetermined rotation angle, and wherein the second predetermined rotation angle is different from the first predetermined rotation angle.