| 摘要 |
PROBLEM TO BE SOLVED: To improve the trouble where the wear of a bush is early advanced owing to infiltration of muddy water in a bush insertion part of supporting members, in a working vehicle in which a center pin is turnably inserted in the front and rear supporting members with a center case and a bush being inserted therein, and a front axle case is supported in an oscillating manner in the right-to-left direction. SOLUTION: A bush 52 is interposed between a center pin 24 for supporting a pinion shaft 43 to transmit the power to a differential mechanism 26 in a center case 29 via bearings 44, 44 and a supporting member 34 with the center pin 24 being inserted therein. An attachment part E of an O-ring 54 to be interposed between the center pin 24 with the center pin 24 being inserted therein is provided on an outer end in the axial direction of the supporting member 34. A space is formed between the end in the axial direction of the bush 52 close to the attachment part E and the attachment part to form a grease sump S. A grease nipple 53 connected to a grease filling passage 34b communicated with the grease sump S is mounted on the outer circumference of the supporting member 34. COPYRIGHT: (C)2011,JPO&INPIT
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