| 摘要 |
TRIM POSITION INDICATOR FOR MARINE MOTORS A marine jet drive unit includes a nozzle which is mounted in a gimbal ring for pivoting about a horizontal axis for trimming of the drive jet. An electric motor drives a gear train including a rotating actuator shaft having an Acme nut actuator connected by a rigid linkage to the gimbal ring for trim positioning of the nozzle. A potentiometer is mounted within the gear housing with an input shaft parallel to the actuator shaft. The outer ends of both shafts are exposed in laterally spaced, aligned relation. A large driven disc element is secured to the potentiometer shaft and has a radium slightly less than the spacing between the two shafts. A pair of small, disc elements are mounted on the actuator shaft with a small flat spring establishing a spring force urging the small, disc elements into clamping engagement with the periphery of the large disc. The gear and actuator shaft are driven through less then one complete revolution by the motor for the complete angular trim orientation of the nozzle. During the initial installation, automatic alignment of the shafts is produced by moving the nozzle to its limit positions. The potentiometer moves to an appropriate limit position during at least one of the trim positions, with slippage between the large and small clamping disc elements permitting the nozzle to move to its limit position and thereby produce proper alignment at The maximum trim position. |
