If you want to know how to judge the rotating direction of a worm wheel, you must first know what a worm wheel is. Worm gear and worm mechanism is often used to transmit motion and power between two staggered shafts. Worm gear and worm are equivalent to rack and pinion in its middle surface, and worm is similar to screw in shape.

The working principle of worm gear and worm is that the two shafts of worm gear and worm drive are perpendicular to each other; Worm can be regarded as a helix with one tooth (single head) or several teeth (multiple heads) around the helix on a cylinder. A worm gear is similar to a spiral gear, but its teeth are wrapped around a worm. When meshing, when the worm rotates, it drives the worm wheel to rotate one tooth (single-headed worm) or several teeth (multi-headed worm), so the speed ratio I of worm wheel transmission is equal to the number of worm heads Z 1/ the number of worm teeth Z2.

There are roughly these series of worm gears and worms: WH series worm gear reducer: WHT/WHX/WHS/WHC, CW series worm gear reducer: CWU/CWS/CWO, WP series worm gear reducer: WPA/WPS/WPW/WPE/WPZ/WPD, TP series worm gear reducer: TPU/TPS/TPA/TPG, PW II type.

In addition, according to the different worm shapes, worm drive can be divided into cylindrical worm drive, toroidal worm drive and conical worm drive.

Another disadvantage of worm drive is its high cost. Sometimes, in order to reduce its friction loss, the expensive antifriction material (bronze) is used in the worm gear, which increases its manufacturing cost to some extent.

Therefore, although worm drive has obvious characteristics, its shortcomings are also obvious. Worm drive is suitable for machines with large transmission ratio and low transmission power.

Determine the rotating direction of the worm or worm wheel: erect the shaft of the worm wheel or worm, with the right height of the helix being right-handed and the left height being left-handed. Judging steering: the right hand rule is used for the right hand, and the driving worm is the right hand. The four fingers of the right hand hold the worm along its turning direction, and the thumb direction is opposite to the node speed of the worm wheel to judge the turning direction of the worm wheel.

The turbine worm turn right according to that rotation direction of the worm; Left-handed and left-handed, the four fingers rotate along the worm to the thumb, and the worm is forced to rotate in the same direction as the worm wheel. The rotation direction of the bevel gear is the same as that of the meshing point. Axial force and radial force should be considered when the helical gear is converted to the ordinary spur gear.

You can judge by your right hand and left hand. I hope I can help you!