Belt drive and chain drive a lot in life, the bicycle is the chain, and also use belt drive in the toy industry, take advantage of its low noise and overload protection. General toys with transmission using openings. The advantages of belt transmission: ( 1) Can transfer movement distance is far; （ 2) Stable operation, low noise; （ 3) Itself through sliding the overload protection; （ 4) Structure is simple, the design accuracy is not high, but also meet the requirements of many toys movement.
belt transmission fault: ( 1) Size is big, a lot of toys products do not have enough space to use; （ 2) Efficiency is lower, theory of transfer speed down slow down for the big wheel radius and small wheel radius ratio for drop ratio; （ 3) Of life is not long, it will cause the service life of the product is not very long ( But life doesn't require a long toy) ； （ 4) Not accurate transmission, With will slip) 。
belt: toy belt used most widely in a transverse with circular and square, materials for rubber commonly. Belt is commonly injection molding, for some small toy factory, they won't do the belt ( Rubber band) , and buy relatively cheap, usually a rubber ring is a few cents, but more than a set of mould to tens of thousands of yuan.
the pulley material generally have copper wheel and POM plastic wheel. General small driving wheel ( Call directly on the shaft of the motor pulley) Will use copper wheel, and the big wheel will use plastic POM wheel. For mechanical principles, the belt and pulley groove side friction, is the most effective, toys on the pulley is such a design, but the reality is sometimes the belt directly to the pressure on the wheel.
pulley requires independent space in the teeth. Because the belt is rubber, plastic POM USES mostly and pulley wheel, but for other transmission structure, such as: gear, motors, etc. , due to the actual operation of the error and the noise is very big, can use noise reduction gear oil, the oil can make the rubber belt and pulley sliding, and will be absorbed by rubber and reduce the service life of the belt, so when designing tooth should put the whole belt and pulley in an independent space, in order to prevent oil splash onto the belt.
the belt on common problems and solutions of life: namely toys cannot through the life test, this basically is the nature of the belt, but can be solved through unnecessary loss to prolong life. Such as: guarantee the driving wheel and driven wheel in the direction of the belt forces are in the same plane, and keep the belt between the wheelbase right, etc.
belt drive underpowered: belt skid. This check to see if there is oil splash into the pulley or belt, it is possible that the pulley in the process of injection molding played a lot of mold release agents, there are two pulley between the wheelbase, and makes the strength is insufficient, may, when necessary, add a transition wheel to increase the contact area between belt and pulley.
add an overload protection device, make the protection work force limit is less than the magnitude of the pulley skid, and to reduce the pulley skid and prolong the service life of belt pulley.