| 摘要 |
A trunnion (12), adapted to fit in a receiver attached to a vehicle or other structural member of a vehicle, provides selective deployment and stowage of a hitch (34). A base (26) preferably secured to the trunnion (12) may receive a permanently attached pivot (28) in slidable engagement therewith. The height of the hitch (34) may be adjusted by sliding the pivot (28) with respect to the base (26) and locking the pivot at a discrete point by placing a locking pin (32) through an aperture (42) formed in the pivot and an aperture (44) formed in the base (26). A mount (30), secured by the pivot (28) to the base (26), swings between a deployed and a stowed position. A platform (60) of the mount may contain an aperture for operating as a pin hitch aperture, or for receiving a stud or bolt for securing a ball hitch, or two hitches. In certain embodiments, multiple ball hitches may be attached at once to the platform. Selection of ball hitch sizes, and positioning of the ball hitch altitude may also be accomplished by pivots built into the mount (30). A double-ball hitch system may be mounted on a swivel system attached to the mount. The double-ball hitch may include two ball hitches, one having a threaded shaft (148) or stud (144) adapted to fit a threaded aperture in the other. Torelieve stresses and obtain a balance of stresses between the neck or shank portion (136) of each ball hitch, at their respective load ratings, a pedestal (158) is provided for one ball, rather than a simple, short flange. The ball hitches may be configured to be selectively presented for use. Also, the mounting system ma y provide for selective deployment and stowage of both hitches together with respect to the mount and the vehicle. The two bal l hitches may attach on opposite sides of a platform. Selection of ball hitch sizes, and positioning of the ball hitch altitude ma y also be accomplished by pivots built into the mount.
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