| 摘要 |
<p>Tractor front loaders of drive-in type have brackets such as (10) and (16) fixed to a tractor and engageable with a detachable sub-frame such as (18) carrying a boom assembly such as (21) mounting a bucket such as (29). The sub-frame is secured to the brackets by close-fitting pins causing removal difficulties, or loose-fitting pins causing loader instability and accelerated pin wear. Easy-release pins (43) are therefore provided, each passing with substantial radial clearance (44) through aligned axially-spaced holes (45) in one bracket (16) and fitting, between the holes (45), in an eccentric bush (47) which fits in a boss (48) fixed to the sub-frame (18) and is rotateable by a handle (49) into an operative position in which the pin (43) establishes contact with one side of the holes (45) and the boss (48) establishes clamping contact with a cam-plate (54) fixed to the bracket (16), or into an easy-release position in which the contacts are disestablished.</p> |
