| 摘要 |
A two-way bulldozer mechanism for mounting on a forwardly extending push frame of an earthmoving vehicle is provided with a reversible blade assembly having opposite upper and lower blade portions hinged together by a central hinge connection formed therebetween. An elongated lever has a central pivot connection for pivotally mounting the lever to the push frame and a lower end thereof pivotally mounted to the blade assembly in coaxial relation to the hinge connection. A motor is operatively connected to the lever for pivoting such lever between a first angular position wherein the hinge connection is disposed rearwardly of the pivot connection and a second angular position wherein the hinge connection is forwardly thereof which, in cooperation with linkage mechanisms individually pivotally interconnecting each of the upper and lower blade portions to the push frame, is operative to position the blade portions in a predetermined pushing mode when the lever is in its first position and in an opposite pulling mode when the lever is in the second position.
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