What is worm gear slew drive？

Worm slew drive is a hot market product, which can greatly improve labor productivity and is widely used in all walks of life. If the slew drive is divided into gear type rotary drive and worm gear slew drive if it is distinguished by variable speed transmission, what are the performance advantages of worm gear rotary drive? What is worm gear slewing drive?

1.Concept of worm slew drive 

2.Difference between gear slew drive and worm gear slew drive 

3.Safety of worm gear slew drive

1.Concept of worm slew drive            

Worm drive refers to the reduction drive with worm as the main action. When the reverse stroke is not self-locking, it can also be driven by worm gear. Generally, the transmission power should be less than 50KW, and the relative sliding speed between tooth surfaces should be less than 15m / S (up to 35m / s). It is composed of worm and worm gear. Generally, worm is the driving part. Worm and thread have the same right-hand and left-hand rotation, respectively known as right-hand worm and left-hand worm.

Slew drive all kinds of cylindrical worm drive parameters and geometric dimensions are basically the same. It is the main parameter of Archimedes cylindrical worm drive. The plane passing through the worm axis and perpendicular to the worm gear axis is called the middle plane. In the middle plane, the tooth profile of worm is straight line and the tooth profile of worm gear is involute. The meshing of worm and worm gear is equivalent to that of rack and involute gear.

2.Difference between gear slew drive and worm gear slew drive            

Gear type slewing drive and worm gear type rotary drive can adapt to the application of medium high speed and low speed respectively. In terms of bearing capacity, the performance of worm gear type is better than that of gear type. When enveloping worm drive is adopted, its bearing capacity, anti deformation ability and transmission rigidity are further improved. Slew drive is a kind of high integrated full circle rotary deceleration mechanism, and its characteristics are more than that. The maximum and minimum slew drive can drive parts and load difference dozens of times, but their size, especially the axial size of the transmission chain, is not different, which is conducive to the structural form of series transmission connecting parts flattening, so as to reduce the whole mechanical equipmen.

No matter the gear type or the worm gear type slew drive, because the size difference between the driving and driven parts is very large, it is easier to realize the transmission with large transmission ratio, which is also difficult for many other types of variable speed transmission mechanism.

3.Safety of worm gear slew drive            

Worm gear transmission has the characteristics of reverse self-locking, which can realize reverse self-locking, that is, only worm can drive worm gear, but not worm gear. This feature makes the slew drive can be widely used in lifting, high-altitude operation and other equipment. It not only improves the technology content of the main engine, but also greatly improves the working stability and safety factor of the main engine. Compared with traditional rotary products, slew drive has the advantages of simple installation, easy maintenance and saving installation space.

Many slew drive worm gears have an interesting feature that other gear sets don't have: the worm can easily turn the gear, but the gear can't turn the worm. This is because the angle on the screw is very shallow. When the gear tries to rotate the screw, the friction between the gear and the screw will keep the screw in place. Worm slew drive is equivalent to spiral transmission, which is multi tooth meshing transmission, so the transmission is stable and the noise is very small. Compared with the traditional gear transmission, worm gear transmission can get a relatively large reduction ratio. In some cases, it can save the reducer parts for the main engine, so as to reduce the purchase cost for customers and greatly reduce the failure rate of the main engine.

Worm and worm slew drive is often used in the situation where two shafts are staggered, the transmission ratio is large, the transmission power is not too large or intermittent work. The material of worm type rotary worm is generally made of carbon steel or alloy steel. In order to prevent gluing and slow down wear, a good lubrication method should be selected. Do you know more about worm gear slew drive? If you have any other questions, please contact us.