| 摘要 |
<p>An object of this invention is to minimize the axial and radial clearance and play at a pin joint connection portion of a machine operating link and suppress a radial inertial movement of the same portion. To achieve this object, this invention provides a joint connecting pin device for a machine operating link adapted to change and retain the posture of a working machine, such as a hydraulic excavator, the device being provided with a thrust distributing and forming unit which is disposed between an end surface of a pin boss of one link joined to a pin and an end surface opposed thereto of a pin boss of the other, and which is adapted to distribute a thrust in the axial and radial directions, a rigid-flexible annular member held in the thrust distributing and forming unit, and an axially movable means adapted to apply a radial resilient force to the rigid-flexible annular member and provided on at least one of the pin bosses. In the above-described structure, the thrust distributing and forming unit may consist of groove surfaces of end shoulders on the outer or inner circumferential side of the opposed end surfaces of the pin bosses.</p> |
