| 摘要 |
Mounting structure provides for coupling a bulldozer blade to a crawler tractor which has four track assemblies each of which may oscillate vertically independently of the others and pairs of which may oscillate laterally relative to the tractor body and which is therefore not adaptable to the coupling of bulldozer push arms to the track frames at each side of the tractor in the conventional manner. A pair of push arms with universal joints at each end extend between pairs of the track assemblies to couple the blade to suspension frame members. A mounting member, pivotable vertically by a centrally located lift cylinder, connects to the blade at another universal joint. To resist side loads, which can be severe owing to the close spacing of the push arms, stabilizing links extend diagonally from the mounting member to the ends of the blade and the links may be fluid cylinders to facilitate tipping and tilting of the blade.
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