CONTROL MECHANISM OF THE REAR WALL OF BUCKETS OF A BUCKET EXCAVATOR WHEEL

摘要

This excavating wheel is of the type comprising two discs forming the side walls between which are fixed fixed walls 21 'to 27' terminated by sharp blades and which form the front walls of the buckets, the rear walls 68 to 73 are articulated on the back of the front walls to be able to take a radially inner position 68, 69, 70, 73 or a radially outer or dumping position 72 and 71. The rear walls are controlled by pushers 54 to 60, themselves articulated on links 42 to 48 d 'a chain 40. According to the invention, this chain is positively guided by a large central toothed wheel 34 and a small offset toothed wheel 36. Each of these wheels rotates freely, the first on the central shaft of the wheel and the second on a shaft fixed to a fitting 39 integral with the central shaft. The chain has a calculated slack which has the effect of imparting a whipping motion to the pushrods and rear walls when dumping.