| 摘要 |
PURPOSE:To enhance the durability and reliability as well as provide easy-to-use characteristic by connecting a plurality of differential gearing devices selectively using a plurality of switching means with possibility of transmission of torque, furnishing a two/four wheels switching mechanism, and thereby eliminating use of any clutching device. CONSTITUTION:No.1 differential gearing device 2 consisting of simple planet gears is connected with a speed changer 1. No.2 differential gearing device 9 consisting of simple planet gears is arranged on the transmission shaft 6 of said No.1 differential gearing device 2, and a drive pulley 10 is fitted loosely. Through a chain 16, said drive pulley 10 is coupled with a driven pulley 18 fitted on a front wheel propeller shaft 17. Further are furnished a No.1 switching means 19 to couple/decouple gears 5, 7 of No.1 differential gearing device 2, a No.2 switching means 20 to couple/decouple the gear 7 with/from the pulley 10, a No.3 switching means 21 to couple/decouple a gear 15 of No.2 differential gearing device 9 with/from the pulley 10, and a No.4 switching means 22 to couple/decouple gears 12, 15 of No.2 differential gearing device 9.
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