1, worm gear reducer structure characteristics:
A large transmission ratio can be obtained, which is more compact than the staggered shaft helical gear mechanism. The line contact between the meshing tooth surfaces of the two wheels has a much higher load carrying capacity than that of the staggered shaft helical gear mechanism.
Worm gear transmission is equivalent to spiral transmission, for the multi-tooth mesh transmission, so the transmission is smooth, noise is very small. Self-locking. When the lead angle of the worm is less than the equivalent friction angle between the teeth of the meshing wheel, the mechanism has self-locking, can realize the reverse self-locking, i.e., can only be driven by the worm wheel, and can not be driven by the worm wheel worm. Such as in its heavy machinery in the use of self-locking worm gear mechanism, its reverse self-locking can play a safety role in protection
Transmission efficiency is lower, and wear is more serious. Worm gear meshing transmission, the relative sliding speed between the meshing gear teeth is large, so the friction loss is large, low efficiency. On the other hand, the relative sliding speed of the Ambassador's teeth wear serious, serious heat, in order to dissipate heat and reduce wear, often using more expensive friction reduction and anti-wear materials and good lubrication devices, resulting in higher costs, worm axial force is larger.
2、Application of self-locking function of worm gear reducer:
Among the gearbox transmission methods, the worm gear transmission has a characteristic not found in other gear transmissions, i.e., the worm gear can easily turn the worm wheel, but the worm wheel cannot turn the worm gear. This is due to the fact that the structure and transmission of the worm gear is realized by friction.
The self-locking function of worm gears is useful in mechanical applications such as winches and conveyors. However, because of the friction transmission of worm gears, the transmission efficiency of worm gears is much lower than that of gears.
Not all worm gear reducers have a good self-locking function. The self-locking function of the worm gear has to reach a certain speed ratio before it can be realized. This is related to the lead angle, i.e. the self-locking function of worm gears with small speed ratios is less desirable.