| 摘要 |
Title STEERABLE AXLE ASSEMBLY WITH PRELOADED KINGPIN DRAWKEYS A steerable axle assembly incorporates an improved kingpin securement system for accommodating wear during the useful life of the kingpin. The assembly defines a steering axle boss having a vertically oriented bore. A pivotal steering knuckle is secured to the boss. A cylindrical kingpin is supported within the bore and extends through apertures in the knuckle to retain the knuckle on the boss. The boss includes a cross aperture which extends transversely to and partially intersects the bore. A drawkey, supported within the cross aperture, includes an elongated head having a tapered flat surface adapted to engage the kingpin. The drawkey includes a threaded shaft portion which has an end extending externally of the cross aperture, and a nut threaded on the shaft portion for securement of drawkey the against the kingpin. A disc spring washer is secured about the threaded shaft portion of the drawkey, between the nut and an exterior surface of the boss for preloading the drawkey against the kingpin. In a preferred form, the taper on the drawkey is within a range of 5-10 degrees, while the preferred load deflection accommodated by the disc spring washers is approximately 30 thousandths of an inch. 2592APP
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