| 摘要 |
In one embodiment, a kingpin assembly (10) has a kingpin (11) mounted so as to be fixed against rotation relative to a trailer (1). A sensor driver (16) is rotatable relative to the kingpin (11) and is engageable with a fifth wheel of a tractor unit so that when the trailer (1) rotates relative to the tractor unit, the sensor driver (16) rotates relative to the kingpin (11). A rotary sensor (26) is drivable by the sensor driver (16) to output a signal corresponding to the rotation of the sensor driver (16) relative to the kingpin (11). The sensor driver (16) is translatable in a direction generally parallel to the central longitudinal axis of the kingpin (11) between an engaging position and a non- engaging position. In this way, if the kingpin (11) is inserted incorrectly into a fifth wheel of a tractor unit, the sensor driver (16) can move along the length of the kingpin (11) to the non-engaging position so as not to engage with the fifth wheel. |
