Crusher in order to adapt to the requirements of the product’s size and crusher in iron, two roller center distance has to change, and two broken roller synchronous rotation. In order to adapt to this kind of situation in the early production of crusher with single electric pilot gear transmission. The drawback of this drive is: small amount of displacement of center distance, the gear is not easy to manufacture, the gear wear serious, even teeth. Adopts double motor drive, that is, each by belt or a motor speed reducer drive a roller, which can get rid of a pair of long tooth gear transmission. But must be equipped with two speed reducer, the cost increase again. In addition, due to the activity bearing need to move, to the belt transmission make the tension change accordingly; If the speed reducer drive, must be put universal joint, to allow the shaft to move along with the roller level without affecting the normal crusher work properly. For fine crusher, adopt single electric drive, long a pair of automobile tires can substitute for gear transmission. In fact, this is the gear drive instead of a pair of tire friction drive. This way of transmission in multiple countries crusher above were applied. Double stick crusher, its transmission system for electric motors, small gear, wheel, tire, activity of the fixed roller, fixed roller roller drive roller rotation. Due to tire elastic roller moving a little, even if the activities of fixed roller tires can still roll movement to the activities of tyres, drive when there is less noise.
Graded crusher with double motor, hydraulic coupling, gear reducer drive gear roller. This way of transmission main advantage is: the transmission power is big, suitable for large capacity and high strength of broken condition, easy to implement and broken roller with low speed. Defect is: transmission link more, fault point, big maintenance and high maintenance cost; Two adjustable roller spacing is poor.
Under the condition of the centre distance change is bigger, can use the speed ratio transmission mechanism such as single motor equipped with time-varying wheelbase, this kind of composite transmission not only realized the time-varying wheelbase speed ratio transmission can allow the center distance of center distance variation can achieve under normal working state, and can realize such as strength design design space is my smaller problems, thus greatly prolonging the service life of the transmission mechanism.