| 摘要 |
872,875. Steering gear for track-laying vehicles. RUF, W. Nov. 8, 1957 (Dec. 21, 1956], No. 34812/57. Class 79(2). In a steering gear arrangement for a tracklaying vehicle one axle 4a, Fig. 3, is positively driven from the driving shaft 1 while the other 4b may be connected to the axle 4a so that it is fast in rotation therewith or may be caused to rotate in the reverse direction. The shaft 1 has a bevel gear 2 in mesh with a bevel gear 3 on the axle 4a which has a toothed ring 20 connected by a coupling sleeve 15 to a ring 16 fast with the axle 4b so that the two axles are rigidly connected when the vehicle is to travel straight ahead; a bevel gear 13 in mesh with the bevel gear 3 turns freely on the axle 4b. To cause the vehicle to make a pivot turn, the sleeve 15 is disengaged from the ring 20 by a fork 22 and is engaged with a similar ring 21 fast with the bevel gear 13 so that the latter imparts a reverse drive to the axle 4b. Means may be provided to synchronize the parts to be coupled. Fig. 3 shows an alternative construction in which the sun gear 3<SP>1</SP> of an epicyclic gear is fast with the axle 4a, the planet carrier 23 is rotatable on the axle 4a and the annular gear 26 is fast with the axle 4b. A clutch member 27 locks the planet carrier 23 to the annular gear 26 so that the epicyclic gear becomes a rigid system when the axles are to be rotated in the same direction. Reverse rotation is imparted to the axle 4b by braking the planet carrier 23. |
