The main difference and feature is that the worm gear transmission ratio is large and the belt transmission ratio is small; Worm and worm drive is vertical drive, while belt drive is parallel drive; The transmission torque of worm gear is small, while the transmission distance of belt is large; Worm and worm drive efficiency is low, while belt drive efficiency is slightly higher; The worm gear and worm are more complex in structure, and the cost is relatively high.
The worm belt drive of the reducer has the following characteristics:
1. It is self-locking. When the helix angle of the worm is very small, the worm can only drive the worm gear, but the worm gear cannot drive the worm to rotate.
2. The efficiency of worm transmission is low, and it is generally believed that the efficiency of worm transmission is lower than that of gear transmission. In particular, the efficiency of the self-locking worm drive is below 0.5, and the general efficiency is only 0.7~0.9.
3. The heat is large, the tooth surface is easy to wear, and the cost is high.
4. Large transmission ratio and compact structure.
5. The transmission is stable without noise. Because the worm gear is a continuous spiral gear, it is continuous when it is engaged with the worm gear. The worm gear does not enter or exit the engagement process, so it works stably with little impact, vibration and noise.
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