As shown in the figure belt transmission device, wheel driving wheel, driven by a belt driven wheel rotate counterclockwise (no slippage between the belt and the belt wheel), two points on the P and Q direction respectively by friction wheels (is)A., Xiang Zuo, Xiang ZuoB. right and rightC. left, rightD. to the right, Xiang Zuo
Where P is the driving wheel, the wheel with the movement of the conveyor belt, the conveyor belt wheel by relatively backward movement trend, Q where the driven wheel is moving on the conveyor belt is driven, the direction of friction.
Q position in the contact belt and a driven wheel, the wheel is moving on a conveyor belt drive, belt right movement trend, the direction of friction to the left;
Therefore, the belt has a tendency to move towards the left relative to the wheel, which indicates that the static friction force is in the right direction;
P position in contact with the driving wheel of the belt wheel, with the movement of the conveyor belt
