| 摘要 |
<p>The front wheel drive for a tractor comprises a Cardan shaft 22 driving a wheel hub (16) by way of bevel gears in a gear casing (18, 20). The shaft has a universal joint at its front end adjacent the gear casing enclosed within a protective sleeve (24). In order to obtain trouble free access to the grease nipple on the universal joint, the protective sleeve is releasably mounted on a support ring (26) fixed to the gear casing by way of legs (28) straddling the cover part (20) of the gear casing, with their ends fixed by the bolts (34) attaching the cover part. The sleeve has at least one L-slot (38) meeting a bayonet connection with a bolt (34) fixed through the support ring. A nut (40), e.g. a wing nut, on the bolt (34) is tightened onto the sleeve to secure its attachment. In order to obtain access to the grease nipple, the nut is slackened off, the sleeve is rotated and is then slid axially back along the shaft (22) to expose the grease nipple, irrespective of the radial position of the grease nipple. </p> |
