| 摘要 |
PURPOSE:To avoid the impart of overload to driving device and driving lever by a method in which the operating lever of oil-pressure pump and the driving lever of driving device are coupled by a gearing lever and also a buffer is provided on the way of the gearing lever. CONSTITUTION:The operating lever 1 of the oil-pressure pump P and the driving lever 10 of the driving device 12 are coupled by gearing lever 7, and the buffer (double-acting spring) S is provided on the way of the gearing lever 7. Thus, when the driving lever 10 is tilted beyond the maximum inclination angle of the oil- pressure pump P, the over-inclined portion is absorbed by the double-acting spring cylinder S, whereby the impart of overload to the driving device 12 and the driving lever 10 can be avoided. Furthermore, even if a gap exists in the operating force- transmission portion between the driving lever 10 and the operating lever 1, it is absorbed by the double-acting spring cylinder S and therefore the transmission of the operating force can be peformed continuously, smoothly, and in a buffer state. |
