Compared with the gear reducer, the worm gear reducer has a self-locking function. Worm gear reducers for lining trolleys are widely used in the mechanical field because of their self-locking function, such as tunnel lining trolleys, winches, packaging machines, printing machines, conveying equipment, and so on. However, it is also because of the frictional transmission method of the worm gear, which also causes the transmission efficiency of the worm gear to be much lower than that of the gear transmission. This is where the worm gear reducer is insufficient.
In the transmission mode of the worm gear reducer, the worm gear transmission has the characteristics that other gear transmissions do not have. That is, the worm can easily rotate the worm wheel, but the worm wheel cannot rotate the worm. This is because the structure and transmission of the worm wheel and worm are realized by friction.
Not all worm gear drives have a good self-locking function. The self-locking function of the worm gear can only be achieved when a certain speed ratio is achieved, and the self-locking effect will be better. This is related to the lead angle, that is, the self-locking function of the worm gear reducer with a small speed ratio is not so ideal.