来源：/ 发布时间：2019-12-05 浏览：次
In the practical application of micromotor, some products need to add a reducer to the micromotor to control the speed and torque of the motor (for example, the intelligent lock product controls the locking tongue through the micromotor). The speed ratio of reducer is very important, so what is the speed ratio of reducer?
Let's first understand the reducer, which is an independent part composed of gear drive and worm drive. Its function is to control the speed of micro motor through multiple gears (small gears drive big gears). The reducer is also called reducer, reducer, gearbox or reduction gearbox, etc. the fast running power of the micro motor motor drives the big gear through the small gear on the input shaft of the reducer to achieve the deceleration effect. The more the big and small gears, the slower the final speed of the micro motor. The ratio of the number of teeth of the big and small gears is called the transmission ratio.
In addition, there is also a kind of transmission ratio (transmission ratio of the reducer), which is simply the ratio of the instantaneous input speed and output speed of the reducer. In the calculation formula, "I" is used. The universal ratio symbol is ":" which is the connected input and output speed ratio value. For example, if the output speed of the micromotor is 7500 rpm, but only 60 rpm after passing the reducer, then the deceleration ratio is I = 125:1.
How does this deceleration ratio come from? In fact, it's just a very simple formula. We can directly calculate the result as 125 by 7500 ÷ 60, that is, the deceleration ratio = input speed ÷ output speed.
In addition to the above simple calculation method, there is also a formula called gear train calculation method: reduction ratio = number of driven gear teeth ÷ number of driving gear teeth (for multi-stage gear reduction, it needs to multiply the number of driven gears of all gear groups engaged ÷ number of driving gears, and finally multiply the results). This method looks more complex. If you just need to know the reduction gearbox The speed ratio of the micro motor manufacturers will be calculated directly for you, do not have to worry about the calculation, to understand. The reduction ratio of the reducer can also be calculated from the result of the driven gear diameter ÷ the driving gear diameter.
What is the effect of deceleration ratio?
The size of the reduction ratio plays a decisive role in the final output torque of the reducer. In the previous articles, it has been said that the larger the reduction ratio is, the greater the output torque will be. The smaller the reduction ratio is, the smaller the output torque will be. The simple point is that the slower the final output speed of the micromotor through the reducer, the larger the torque will be, and vice versa.
The torque of the reducer can also be calculated by the formula: reducer torque = 9550 × motor power ÷ motor input speed × speed ratio × service factor.
Note: the formula requires the power, speed ratio and service factor of the micromotor to calculate the torque of the reducer. The manufacturers of these micromotors have them and they will calculate them for you.