very often to describe the motion of a mechanism using a term such as gear ratio.What is it and what is its essence, try to figure out right now.
Each mechanism characterized by the input and output shaft and, respectively, the input and output parameters, which include, in particular, can be attributed interconnected speed and angular velocity.The motor is always connected to the beginning of each device and transmits the movement to the input shaft.This is also called the leading shaft, since it is then transmitted through the movement on the whole mechanism and the output (driven) shaft in particular.The angular velocity of the shaft output or change its meaning, or direction, or both.Therefore, to determine the relationship or changing the characteristics of rotation of the driven and driving shafts and had no time to put the concept of interest to us.
Thus, it can be argued that the gear ratio for any mechanical device can be found by dividing the final angular velocity of the home.Considering there is a direct relationship between the characteristics of the movement of the shaft, the desired ratio is the same way in terms of known frequencies of shaft rotation.So how is the division of the same name value, the parameter is found not to have dimension.
gear ratio is determined not only for elementary programs, but for more complex devices.These include, in particular, the gearbox multistage gearboxes.Here there are the features of calculations.At the last device in greater detail.
gear ratio will depend on the number of stages.If it contains only one transmission, then simply calculate the required value for it for a simple device to achieve this goal.If multiple stages, the overall transmission ratio can be determined by multiplying the gear ratios of all stages, or by dividing the angular velocity at the input shaft into the gearbox on the angular velocity at the outlet.You can also use the knowledge of torque.To do this, find the ratio of the output and input.If it is greater than one, it is called a step-up gear, if less - is reduced.Whichever method for its calculation you choose, in all cases, should have the same numerical value.You can check the correctness of his calculations, using all of the above methods.
gear ratio gear is also defined in different ways.In addition to the above, you can also take advantage of the knowledge of the number of teeth on the drive and the driven wheels.It is enough to find the ratio of the first and the last value.Sometimes the literature similarly calculated gear ratio, it is noted that it may not be less than unity.Recently, however, these concepts have merged, and in many modern textbooks on the course "Machine parts" in this way it is calculated attitude, not just a number.This is apparently correct since they actually represent the same thing: how to change the input and output transmission parameters, although initially to determine the relationship was not a value produced by dividing an output parameter at the output, or vice versa.
Many use ratio for solving the inverse problem.For example, if we know the characteristics of this mechanism and its input angular velocity, then to find the output will be sufficient to multiply each other named parameters.
I hope you have read the information would fill some of the gaps in your knowledge, and you can use it to perform a variety of engineering calculations.
