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1 – a drive to the forward bridge; 2 – a hollow shaft (a drive to a transmission); 3 – the differential case; 4 – a flange/kardannyj a shaft (for a drive The back bridge); 5 – a worm of a drive of a back axis; 6 – a cogwheel; 7 – an axis of worm wheels; 8 – worm wheels; 9 – a worm of a drive of the forward bridge. The distributive (central) differential serves for alignment of forward and back transmission. (Differentials of a forward and back axis work irrespective of it.) It takes places – outside not perceived as separate knot – behind on a mechanical transmission. Engineers speak: it is integrated. The name торсен proceeds from firm on manufacture of transmissions Gleason in which this differential has been invented. Its name is derivative of English letters Torque Sensing that means «feeling a twisting moment». Thus, it already consists in this concept the function description, as: The differential transfers the raised force to a drive of that axis, at which best coupling with a ground; It occurs so effectively (it is caused by a design) that this axis can transfer in 3,5 times большее effort, than other axis. But at equally good properties of a ground equivalent distribution of a drive to a forward and back axis is carried out, i.e. There is no preference of one axis caused by a design. Functioning principle Torsen-differential work is based on a principle of a worm drive and uses its basic principles: The worm drive can be designed in such a manner that will possess high or low ability of blocking (blocking size in this case repeatedly increased force from which transfer should be turned); The size of value of blocking depends on an angle of slope of a worm, i.e. At a worm a lot of flat or few abrupt coils; Example of a flat worm with high degree of blocking is the jack in which the knee on which the worm operates, lifts the car, but the car never can actuate a knee at the expense of the weight.