The characteristics and differences between worm gear and belt drives. Here, let me, the editor of Jiaoxing Drive, summarize them. The main differences and characteristics are as follows: worm gear drives have a larger transmission ratio, while belt drives have a smaller one; worm gear drives are vertical transmissions, while belt drives are parallel transmissions; worm gear drives have a smaller moment arm, while belt drives have a larger one; worm gear drives have lower efficiency, while belt drives have slightly higher efficiency; structurally, worm gears are more complex and relatively more expensive.

1. Transmission characteristics of worm gear reducer

1. With self-locking property, when the helix angle of the worm is very small, the worm can only drive the worm wheel to rotate, but the worm wheel cannot drive the worm to rotate.

2. The efficiency of worm gear transmission is low. It is generally believed that the efficiency of worm gear transmission is lower than that of gear transmission. Especially for worm gear transmissions with self-locking properties, their efficiency is below 0.5, with a general efficiency of only 0.7 to 0.9.

3. High heat generation, easy wear of tooth surface, and high cost.

4. The transmission ratio is large and the structure is compact. The number of worm gear heads is represented by Z1, 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, that is, the worm gear is single-headed, the worm gear must rotate Z2 times for the worm wheel to rotate once. Therefore, a large transmission ratio can be obtained. Generally, in power transmission, the transmission ratio I is taken as 10-80; in indexing mechanisms, I can reach 1000. Such a large transmission ratio requires multi-stage transmission if using gear transmission, so the worm gear transmission structure is compact, small in size, and light in weight.

  5. The transmission is smooth and noiseless. Because the worm gear teeth are continuous helical teeth, their meshing with the worm wheel teeth is continuous. There is no process of entering and exiting meshing for the worm gear teeth, so the operation is smooth with minimal impact, vibration, and noise.

II. Characteristics of belt drive of reducer

  Transmission mechanisms are widely used in modern mechanical transmissions due to their simple structure, smooth transmission, ability to absorb shock and vibration, capability of transmitting power across large shaft spacings and multiple axes, low cost, no need for lubrication, and easy maintenance. Friction-type belt transmissions can overload and slip, with low operating noise, but the transmission ratio is not accurate (slip rate is below 2%); synchronous belt transmissions can ensure synchronous transmission, but their ability to absorb load variations is slightly poor, and high-speed operation produces noise. In addition to transmitting power, belt transmissions are sometimes used to transport materials and align parts.Image article from the internet. If there is any infringement, please contact us for deletion