What is a Gear Ratio?

Gear ratio, two gears with different diameters mesh and rotate together. The rotation speed of a gear with a larger diameter will naturally be slower than that of a gear with a smaller diameter. Their speed ratio is actually inversely proportional to the size of the gear diameter. After changing the speed of the gear set, it is transmitted to the wheels. There are several sets of gears with different gear ratios in the gearbox for the driver to choose to match the speed and load. When driving, shifting is to choose a combination of different gear ratios.

Large gear \ motor gear = external gear ratio, differential gear \ bevel gear = internal gear ratio, external gear ratio X internal gear ratio = gear ratio, generally the internal gear ratio is fixed, so changing the gear ratio will generally change to large gear Or change the motor teeth. The large tooth is unchanged, the motor tooth is enlarged, and the gear ratio is reduced, otherwise it is increased. The motor teeth are unchanged, the large teeth are reduced, and the gear ratio is reduced, and vice versa. The smaller the gear ratio, the faster the straight end, but the smaller the torque, the slower the starting, the larger the gear ratio, the slower the straight, the larger the torque, and the faster the start.

The correct gear ratio is selected based on the number of motors, the grip of the track, the size of the field, and the characteristics of the curve. You need to get up fast and speed straight.

The so-called electronic gear ratio is to amplify or reduce the pulse frequency of the host computer received by the servo. In practical applications, it connects different mechanical structures, such as ball screws, worm gear pairs, pitch, and number of teeth. The required motor rotation is different. The electronic gear ratio matches the number of motor pulses and the minimum mechanical movement. The electronic gear setting can make the command pulse set to any value. If the electronic gear is not set properly, the machine will malfunction. , Can not be processed to meet the size requirements of the workpiece. ^[1]

The bicycle project is a crank that drives an athlete when pedaling, the sprocket is driven by the crank to make active operation, and the chain is used to drive the flywheel and the rear wheel to perform driven operation, thereby forming a form of motion that pushes the bicycle forward. The ratio of the sprocket to the flywheel is the gear ratio. Its size determines the amount of force available on the rear wheel of the bicycle, which directly affects the forward speed of the bicycle and directly affects the working condition of the athlete. One of the important issues. ^[2]

Ford of the United States has developed technology that can change the steering gear ratio according to vehicle speed. With this technology, in the low speed area, even if the steering angle of the steering gear is small, the wheels will deflection greatly, so that the vehicle can easily turn in a narrow place; in the high speed area, the wheel's steering angle is suppressed relative to the steering angle. Deflection to ensure vehicle stability. ^[3]