STRUCTURE FOR PREVENTING DROPPING OF PROPELLER SHAFT

摘要

A fall-off preventing structure of a propeller shaft does not allow a companion flange to be completely pulled off and dropped from a spline shaft when a nut loosens and comes off. In the propeller shaft, a round shaft part is provided on a front end of the spline shaft, a length of a threaded part of the spline shaft front end side on which the nut is screwed and the round shaft part is set longer than a length from a front end portion of the companion flange to a seat surface of the nut, and a total length of the length of the threaded part and the round shaft part and a length from the front end portion of the companion flange to the seat surface of the nut is set longer than the tolerable slide amount.

主权项

1. A fall-off preventing structure of a propeller shaft being divided into a first propeller shaft and a second propeller shaft, comprising:
a companion flange spline fitting on a spline shaft of the first propeller shaft; a nut being screwed on a front end side of the spline shaft, thereby fastening and fixing the companion flange in an axial direction of the spline shaft; a spline shaft of the second propeller shaft spline fitting in a spline yoke of the second propeller shaft coupled to the companion flange via a universal joint; and a spline engagement length of the companion flange and the spline shaft of the first propeller shaft being shorter than a tolerable slide amount of the spline yoke and the spline shaft of the second propeller shaft, wherein a round shaft part is provided on a front end of the spline shaft on which the nut is screwed; a length of a threaded part of the spline shaft front end side on which the nut is screwed and the round shaft part is set longer than a length from a front end portion of the companion flange to a seat surface of the nut; and a total length of the length of the threaded part and the round shaft part and a length from the front end portion of the companion flange to the seat surface of the nut is set longer than the tolerable slide amount.