| 摘要 |
A tractor front hitch (10) has a support structure (11) for attachment to a chassis of the tractor, a linkage (12) mounted on the support structure for pivoting in a vertical sense about a generally horizontal axis (13) and actuator cylinders (14) mounted on the support structure for pivoting the linkage relative to the support structure. The cylinders are connected with a links (15) which is pivotally mounted (17) on the linkage (12) and can be secured by pins (23) in first and second pivotal positions relative to the linkage. With the links (15) secured in their first pivotal position first working range of movement of the linkage relative to the support structure is provided by the cylinders (14) and with the links (15) secured in their second pivotal position, a second more raised range of movement of the linkage relative to the support structure is provided by the cylinders (14). The second range of movement of the hitch culminates in a fully raised stowed position of the linkage (12) in which the linkage is substantially vertical to minimise the projection of the linkage from the support structure (11). |
