differentials, there are spring mechanisms, misalignment sensors, electromagnetic catches, and the drive of the docking mechanism, with a friction self-adjusting brake. The configuration of the block is mainly determined by the type of differentials and the spring mechanisms. The APDA uses cylindrical differentials and parallel arrangement of the spring mechanisms with spiral springs (Figure 3.11). In this kinematic scheme, one of the differentials in the block is connected with the lateral wheel of the other differential . To provide the required correlation in the differential kinematic scheme and to avoid twisting of the springs of the mechanism connected with, during coupling, a pair of gears (on the carrier of and the solar wheel of differential has a transmission ratio of 2:1. The pair of gears between .12 and its spring mechanism has the same transmission ratio. During coupling there is continuous misalignment of one of the differentials . Elements of the block of differentials rotate during shock absorption, thus they should have a minimal inertia and friction. Consequently, it is desirable to reduce the number and dimensions of the moving elements. The choice of transmission ratios is very important. The speed of rotation of the main elements of the block is determined by the transmission ratios between the nuts of the ball-screw converters and differentials and the converter momenta in the shafts and gears, their size and mass, and the relative mass of the rotating parts depend on these transmission ratios. In order to reduce the inertia of the reducer it is usually advantageous to reduce the speed of rotation of its elements. For example, if it is assumed that the torque transmitted by the gear may be varied by changing its width b, then the moment of inertia of the gear 1 is proportional to h and for a constant diameter of the gear increases linearly as the transmission ratio of the reducer i decreases. The applied moment of inertia of the gear . For the docking mechanism it can be assumed that the mass of rotating mass with inertia applied to the forward motion of the ring is defined by the approximate formula
RkJQdWJsaXNoZXIy MTU5NjU0Mg==