Processing of single-head, double-head, three-head and multi-head worms and matching copper worm gears

Worms are generally divided into (single-head, double-head, three-head and multi-head worms). The worm refers to a gear that has one or several helical teeth and meshes with the worm gear to form a staggered shaft gear pair. Its indexing surface can be a cylindrical surface, a conical surface or a torus surface.
Worm transmission structure
Worm transmission is composed of a worm and a worm gear. It is used to transmit motion and power between staggered shafts. Usually the staggered angle of the two shafts is. In general worm transmission, the worm is used as the driving part. Worm gear mechanisms are commonly used to transmit motion and power between two staggered shafts. The worm gear and worm are equivalent to gears and racks in their mid-plane, and the worm is similar in shape to the screw.
In appearance, the worm is similar to a bolt, and the worm wheel is much like a helical cylindrical gear. During operation, the worm gear teeth slide and roll along the helical surface of the worm. In order to improve the contact between the gear teeth, the worm gear is made into an arc shape along the tooth width direction so that it partially covers the worm. In this way, when the worm and worm gear mesh, there is line contact instead of point contact.
Use the selection of the number of worm heads
When selecting the number of worm heads, the transmission ratio and efficiency are mainly considered
From the manufacturing aspect, the more the number of worm heads, the higher the worm manufacturing accuracy requirements
>. From the perspective of improving efficiency, the more heads, the higher the efficiency. If self-locking is required, a single head should be selected
. From the perspective of improving the transmission ratio, a smaller number of heads should be selected
. The number of worm heads The recommended value is ,. When the value is small, the transmission ratio is large and it has self-locking properties. When the value is large, the transmission efficiency is high and it has self-locking properties. When the lead angle of the worm is less than the equivalent friction angle between the meshing gear teeth, the mechanism is self-locking and can achieve reverse self-locking, that is, the worm can only drive the worm gear, but not the worm gear. For example, the self-locking worm mechanism used in lifting machinery has a reverse self-locking function that can play a role in safety protection. Worm transmission is equivalent to a screw transmission and is a multi-tooth meshing transmission, so the transmission is stable and the noise is very small.
In power transmission, on the premise of compact structure, improving efficiency should be well considered. When the transmission ratio is small, a multi-head worm should be used. When self-locking is required to transmit motion, a single-head worm is often used. To inquire about accessories processing, please add a WeChat ID or call us