Worm gear transmission in mechanical transmission
Release Time ：
2024-11-28
Source ：
network
Author：
Made by Guangdong Yongkun Motor Co., Ltd
Worm gear transmission is composed of a worm and a worm wheel, used to transmit motion and power between intersecting shafts, usually with a 90 ° angle between the two shafts. In general worm gear transmission, the worm gear is used as the active component. From the appearance, the worm is similar to a bolt, while the worm wheel is very similar to a helical cylindrical gear. During operation, the worm gear teeth slide and roll along the helical surface of the worm. Worm gear refers to a gear that has one or several helical teeth and meshes with a worm wheel to form a staggered shaft gear pair. The indexing surface can be cylindrical, conical, or toroidal. There are four categories: Archimedean worm, involute wor m, normal profile worm, and conical enveloping cylindrical worm. Worm gears, like threads, can be divided into right-handed and left-handed, respectively referred to as right-handed worm gears and left-handed worm gears. In order to improve the contact between the gear teeth, the worm wheel is made into a circular arc shape along the tooth width direction, so that it wraps around the worm part. In this way, when the worm gear and worm wheel mesh, it is in line contact rather than point contact.
Advantages of worm gear transmission
The single-stage transmission ratio is large, generally i=10~100. In the indexing mechanism that transmits power, the maximum can reach over 1500.
Same meshing is a linear contact that can withstand significant power.
Compact structure, smooth transmission, and low noise.
When the worm gear lift angle is less than the equivalent friction angle between the gears, it has reverse stroke self-locking, that is, only the worm gear can drive the worm wheel, and the worm wheel cannot drive the worm gear.
Disadvantages of worm gear transmission
The two axes are perpendicular, and the linear velocity of the two wheel nodes is perpendicular, so the relative sliding speed is high, which is prone to heating and wear.
Low efficiency, generally ranging from 0.7 to 0.8; Worm gears with self-locking properties have lower efficiency, generally less than 0.5.
NMRV gearbox,Worm gear reducer,Gear motor
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