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Characteristics and differences between worm gear transmission and belt transmission.

Characteristics and differences between worm gear transmission and belt transmission. Here is a summary of the Liangqi reducer. The main differences and characteristics are that the worm gear transmission ratio is large and the belt transmission ratio is small; the worm gear transmission is vertical transmission, while the belt transmission is parallel transmission; the worm gear transmission torque is small, but the belt transmission distance is large; the worm gear transmission efficiency is low, The belt transmission efficiency is slightly higher; the worm gear is more complex in structure and the cost is relatively high.

1. Belt transmission characteristics of reducer
The transmission has the characteristics of simple structure, smooth transmission, buffering and vibration absorption, and the ability to transmit power between large shaft distances and multiple shafts. It is low in cost, does not require lubrication, and is easy to maintain. It is widely used in modern mechanical transmissions. Friction-type belt drive can slip over load and has low operating noise, but the transmission ratio is inaccurate (sliding rate is less than 2%); synchronous belt drive can ensure transmission synchronization, but has slightly poor ability to absorb load changes and produces noise during high-speed operation. In addition to transmitting power, belt drives are sometimes used to transport materials, arrange parts, etc.

2. Characteristics of reducer worm drive
(1) 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) Worm transmission efficiency is low. It is generally believed that worm transmission efficiency is lower than gear transmission. In particular, the efficiency of self-locking worm drive is below 0.5, and the general efficiency is only 0.7 to 0.9.

(3) The heat generation is large, the tooth surface is easy to wear, and the cost is high.

(4) Large transmission ratio and compact structure. The number of worm heads is represented by Z1, and the number of worm gear teeth is represented by Z2. It can be seen from the transmission ratio formula I=Z2/Z1 that when Z1=1, that is, the worm has a single head, and the worm must rotate Z2 before the worm gear rotates once, so a large transmission ratio can be obtained. Generally, in power transmission, take Transmission ratio I=10-80; in the indexing mechanism, I can reach 1000. Such a large transmission, such as gear transmission, requires multi-stage transmission. Therefore, the worm transmission has a compact structure, small size and light weight.

(5) The transmission is smooth and noiseless. Because the worm teeth are continuous and uninterrupted helical teeth, they mesh with the worm gear teeth continuously. The worm teeth do not enter and exit the meshing process, so the work is smooth and the impact, vibration and noise are small.

Post time: Dec-08-2023