People who know a little about automobiles know that many mechanisms in automobiles use gear transmission. For example, the gearbox of the car is a complex gear transmission mechanism, other car transaxle, differential, steering, and so on, and even some electrical components, such as glass elevator, windshield wiper, electronic handbrake, etc., in these devices also use the gear drive. Since gears are so widely used and so important in cars, how much do we know about them? Today we're going to talk about gears in cars. Gear drive is one of the widely used drives in automobiles. It mainly has the following functions:
1, change speed: through two different size gear meshing, you can change the speed of the gear. For example, transmission gear can reduce or increase the speed of the engine to meet the needs of the car;
2. Torque change: Two gears of different sizes mesh, changing the speed of the gear at the same time, also changing the torque delivered. For example, the car gearbox, the main reducer in the drive axle, can change the torque of the car;
3. Change direction: the direction of the power action of the engine of some cars is perpendicular to the direction of the car, and the transmission direction of the power must be changed to drive the car. This device is usually the main reducer and differential of the car. Automotive gear requirements are very high, gear tooth body should have high breaking resistance, tooth surface should have strong pitting resistance, wear resistance and high adhesive resistance, that is, requirements: tooth surface hard, core tough. Therefore, automobile gear processing technology is also very complex, generally has the following procedures:
Blanking ➟ forging ➟ normalizing ➟ machining ➟ local copper plating ➟ carburizing ➟ ➟ low temperature quenching tempering ➟ shot peening ➟ gear grinding, fine grinding)
The gear produced in this way not only has sufficient strength and toughness, but also has high hardness and wear resistance.
