Hydraulic drive system for a counterweight dolly in counterbalance type crane
AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorMitsuo Kakeya
Life of this patent
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Abstract
A hydraulic drive system for counterweight dolly in a counterbalance type crane, including dolly driving wheels supported vertically movably through wheel supporting hydraulic cylinders at the lower portion of the counterweight dolly which is connected to the rear portion of a crane body; a wheel driving hydraulic motor connected to each of the wheels; a support pressure detecting mechanism for detecting a support pressure for each wheel supporting hydraulic cylinder, the support pressure detecting mechanism being provided in a drive circuit for the cylinder; and a mechanism for controlling the driving pressure for the wheel driving hydraulic motor in accordance with a detected value provided from the detecting mechanism.
Claims5
A hydraulic drive system for a counterweight dolly in a counterbalance type crane, including:
- dolly driving wheels vertically movably supported through wheel supporting hydraulic cylinders at the lower portion of the counterweight dolly which is connected to the rear portion of a crane body;
- a wheel driving hydraulic motor connected to each of said wheels;
- support pressure detecting means for detecting a support pressure of each of said wheel supporting hydraulic cylinders, said support pressure detecting means being provided in a drive circuit for the cylinders;
- and
- means for controlling the driving pressure for said wheel driving hydraulic motor in accordance with a detected value generated from said detecting means.
Dependencies are inferred from the claim text.