| 摘要 |
A trailer hitch apparatus includes a detachable hitch frame unit mounted to a drawbar on the rear of a tractor. The hitch frame unit includes at its bottom center, a connecting pin adapted to fit into an aperture at the forward end of the trailer tongue, a guide element mounted in front of said hitch rod, and a spring-biased locking device including a locking arm pivotally mounted above the connecting pin. The drawbar is coupled to power means on the tractor for raising and lowering the connecting pin into and out of the trailer tongue aperture to couple and uncouple the trailer and tractor. In its operative position the locking arm engages the top of the trailer tongue while the connecting pin extends through the trailer tongue aperture, thereby preventing accidental disengagement of the trailer tongue. The locking pin arm automatically locks in its operative position when the hitch assembly is raised and automatically unlocks to a release position when the hitch assembly is lowered.
|
