As an important part of the gear reducer, the gear teeth play a pivotal role in the gear reducer. Like a good gear, the benefits of a gear reducer are as follows:
1. In the common mechanical transmission, the gear transmission efficiency is 90%, and the closed transmission efficiency is 96%~99%, which is very economical for high-power transmission.
2. The structure is more compact than belt-shaped and chain-shaped transmission requires less space.
3. Stable transmission ratio is often the most basic requirement for transmission performance. It is precisely because of its characteristics that gear transmission has been widely used.
4. Reliable work and long life. Design and manufacture are correct and reasonable. Using well-maintained gear transmission, the work is very reliable, and the life span can be as long as ten or twenty years, which is unmatched by other mechanical transmissions.
The gears that make up the reducer can be divided into helical gears and spur gears. Why are the gears of many reducers with helical teeth? Through comparison, we can come to the reason.
Compared with spur gears, the position of the shaft of the helical gear reducer is more free. For example, the differential drive shaft using oblique bevel teeth does not have to be in the same horizontal plane as the rear axle, and it must be if it is straight bevel teeth.
To reduce noise, if the gear reducer uses helical teeth, the noise will be much lower than that of a spur gear at the same speed. Because the helical tooth surface of the gear reducer is in point contact first, then transition to surface contact, * to point contact. The straight wheel is in contact with the surface line. The transition of the helical gear is smooth. Therefore, the noise generated by the sudden change of the contact point is much less than that of a flat tooth.
The helical gear has a large coincidence degree, and multiple teeth can be inserted at the same time. Reduce impact and noise, make the transmission more stable, and can withstand high speeds.
During the processing, avoid undercutting due to few teeth*. Therefore, under the same transmission ratio, the number of corresponding gears is small, and the volume of the reducer using helical gears is small.
The China Speed Control Gear Motors Company is simple. The gear hobbing machine can be used to produce different shapes of teethnumber and modules with the same shape of a set of helical gear reducers on the cylindrical blank. Later, it can be cut into different shapes according to customer requirements.
But spur gear has poor transmission stability and high impact noise. The gear reducer is adopted, which has a large transmission overlap and good tooth surface contact, so the load capacity is high; the smallest gear of the helical gear is less than the straight gear, so the mechanism is compact, and the manufacturing cost is lower. Same for straight teeth. The use of helical gears in the gearbox is more reasonable and conforms to the engineering reality.
The helical gear reducer has many advantages, but its advantages are based on precision manufacturing, precision surface treatment, and precision machining of the tooth profile correction.
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