| 摘要 |
PROBLEM TO BE SOLVED: To simplify operational labor during turning of a tractor by providing a front wheel differential device with a frictional-force adding mechanism which impresses frictional force for restraining relative rotation. SOLUTION: In a front wheel differential device 21, crank arms 21h which are connected through wires with a brake pedal or a hand brake are engaged on symmetric right and left ends around a differential gear 21a which is connected with a front wheel 21f, and a pressing plate 21c, a both-sides frictional plate 21d, and a spring 21g are arranged sequentially outward of the front wheel 21f. The pressing plate 21c rotates integrally with a differential gear case 21b, and slides by operation of the crank arms 21h. A fixing plate 21e is inserted into the outer part of a differential cover 21i which covers the spring 21g. The both-side frictional plate 21d is always pressed onto the pressing plate 21c by the spring 21g and rotates integrally with the wheel 21f.
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