What are the functions of reducer worm gear and worm mechanism?

The worm gear and worm mechanism of the reducer are difficult to understand for the purchasing agent who has just entered the industry. Many people will think that the worm gear and worm gear of the reducer are a part, or they will think that the worm gear reducer and worm gear reducer are a kind of reducer, and the functions of the worm gear and worm mechanism of the reducer are naturally the same. Are they the same?

1： Characteristics of worm gear and worm mechanism of reducer:

The worm gear and worm mechanism of reducer are often used to transmit the motion and power between two staggered shafts. They are used in the occasions where the two shafts are staggered, the transmission ratio is large, the transmission power is small or intermittent. The worm gear and worm are equivalent to gear and rack in its middle plane, and the shape of worm is similar to that of screw.

It is characterized by:

1. Large transmission ratio can be obtained, which is more compact than staggered shaft helical gear mechanism

2. The meshing tooth surfaces of two wheels are in line contact, and its bearing capacity is much higher than that of staggered shaft helical gear mechanism

3. Worm transmission is equivalent to screw transmission, which is multi tooth meshing transmission, so the transmission is stable and the noise is very small

4. Self locking. When the lead angle of the worm is less than the equivalent friction angle between the meshing teeth, the mechanism has self-locking and can realize reverse self-locking, that is, the worm wheel can only be driven by the worm, but not by the worm wheel. Such as the self-locking worm mechanism used in its heavy machinery, its reverse self-locking can play a role in safety protection. Wear resistant electrode

5. Low transmission efficiency and serious wear. In worm gear meshing transmission, the relative sliding speed between meshing teeth is large, so the friction loss is large and the efficiency is low.

2： Material selection of worm gear and worm mechanism of reducer

In order to dissipate heat and reduce wear, expensive materials with good antifriction and wear resistance and good lubrication devices are often used, so the cost is high