What are the rotation characteristics of worm gear reducer?

What are the rotational characteristics of worm gear reducers. The transmission of the worm gear reducer is stable and noiseless, as the worm gear teeth are continuous spiral teeth that engage with the worm gear teeth continuously. The worm gear teeth do not enter or exit the meshing process, so the work is stable, and the impact, vibration, and noise are relatively small. The worm gear reducer has self-locking characteristics.

The helix angle of the worm is very small, and the worm can only drive the worm gear transmission, while the worm gear cannot drive the worm to rotate. The efficiency of worm drive is low, and it is generally believed that the efficiency of worm drive is lower than that of gear drive. Especially for worm drive with self-locking, its efficiency is below 0.5, and the general efficiency is only 0.7-0.9.

Overall, the worm gear reducer has a large transmission ratio and a compact structure. The number of worm heads is represented by Z1 (usually Z1=1-4), and the number of worm gear teeth is represented by Z2. From the transmission ratio formula I=Z2/Z1, it can be seen that when Z1=1, i.e. the worm is a single head, the worm needs to rotate Z2 to rotate the worm gear, thus obtaining a large transmission ratio. Generally, in power transmission, the transmission ratio I=10-80 is taken; In the indexing mechanism, I can reach 1000. Such a large transmission, such as using gear transmission, requires multi-level transmission, so the worm transmission structure is compact, small in size, and light in weight.