What is the gear ratio, and the relationship between gear transmission power and transmission ratio

Gear: i=n1 n2=z2 z12, transmission ratio.

The value of the speed of the driving wheel divided by the speed of the driven wheel = the reciprocal of the ratio of the diameter of their indexing circles. 3. Transmission ratio = using torque.

9550 Motor Power Motor Power Input Rotation Usage Factor.

4. For multi-stage gear transmission.

The transmission ratio between each two shafts is calculated according to the above formula. The total transmission ratio from the first shaft to the nth shaft is equal to the product of the transmission ratios of each level.

The transmission ratio is generally distributed according to the following principles: the transmission carrying capacity of all levels is roughly equal; Make the reducer.

The size and mass are smaller; Make the circumferential speed of the gear at all levels smaller; When oil bath lubrication is used, the difference in oil immersion depth of the large gear of each gear pair is small. High efficiency In the commonly used mechanical transmission, the gear transmission efficiency is the highest, and the closed transmission efficiency is 96% 99%, which has great economic significance for high-power transmission.

2. Compact structure: The space size required for belt and chain drive is smaller.

3. Reliable work and long life The design and manufacture of the gear transmission are correct and reasonable, and the use and maintenance are very reliable, and the service life can be as long as one or two decades, which is also incomparable with other mechanical transmissions.

4. Stable transmission ratio Stable transmission ratio is often the basic requirement for transmission performance. Gear transmission is widely used precisely because of its characteristics.

There are two questions involved: 1) Which one is the ratio to which one? 2) Is it an instantaneous or average ratio?

1) This problem belongs to the definition of the transmission ratio. In order to indicate which transmission ratio is which one to which one, it is usually represented by a right subscript 12 in the lower right corner of the transmission ratio symbol, which refers to the speed ratio of gear 1 to gear 2. 2) This problem belongs to the calculation method of the transmission ratio.

According to the definition, it can be calculated by the rotation angle ratio of two wheels at the same time, that is, the transmission ratio of gear 1 to gear 2 = the rotation angle of gear 1: the rotation angle of gear 2, this method is suitable for the calculation of both instantaneous transmission ratio and average transmission ratio. In fact, the instantaneous gear ratio fluctuates along the theoretical value due to the impact of manufacturing and assembly errors, tooth profile wear, and variable stiffness excitation of single and double tooth meshing.

In order to calculate the simplicity, the gear ratio is generally used to calculate the average transmission ratio, that is, the theoretical transmission ratio, so that the transmission ratio of gear 1 to gear 2 = the speed of gear 1: the speed of gear 2 = the number of teeth of gear 2: the number of teeth of gear 1.

Power is the work done by the engine, and the transmission ratio is the ratio of the power output of the drivetrain. The formula for calculating the gear transmission ratio: transmission ratio, driven wheel tooth number, driving gear tooth number, driving wheel speed, driven wheel speed i=z2 z1=n1 n2.

The transmission ratio is the ratio of the angular velocity of the two rotating members in the mechanism, also known as the speed ratio. The transmission ratio of component a and component b is i= a b=na nb, where a and b are the angular velocities (radian seconds) of components a and b respectively; Na and Nb are the rotational speeds of components A and B, respectively** minutes).

Allocation principle. The distribution of the transmission ratio at all levels of the multi-stage reducer directly affects the bearing capacity and service life of the reducer, and also affects its volume, weight and lubrication. The transmission ratio is generally distributed according to the following principles:

The bearing capacity of the transmission at all levels is roughly equal; Make the size and mass of the reducer smaller; Make the circumferential speed of the gear at all levels smaller; When oil bath lubrication is used, the difference in oil immersion depth of the large gear of each gear pair is small.

The low-speed gear directly affects the size and weight of the reducer, and the low-speed gear ratio is reduced, that is, the size and weight of the low-speed gear and the body that contains it are reduced. Increasing the transmission ratio of the high-speed stage, that is, increasing the size of the high-speed stage gear, reducing the size difference with the low-speed stage of the large gear, is conducive to the simultaneous oil bath lubrication of the gears at all levels; At the same time, after the size of the pinion of the high-speed stage is reduced, the circumferential speed of the gear of the high-speed stage and the subsequent stages is reduced, which is conducive to reducing noise and vibration and improving the stability of transmission.

Transmission ratio - the ratio of the angular velocity or rotational speed of the starting driving wheel to the end driven wheel in a mechanical transmission system.

Transmission ratio (i) = the ratio of the speed of the driving wheel (n1) to the speed of the driven wheel (n2) = the inverse ratio of the diameter of the gear indexing circle = the ratio of the number of teeth of the driven gear (z2) to the number of teeth of the driving gear (z1).

i.e.: i=n1 n2=d2 d1 i=n1 n2=z2 z1

For multi-stage gearing.

1: The transmission ratio between each two shafts is calculated according to the above formula.

2: The total transmission ratio from the first shaft to the nth axis is calculated according to the following formula: Total transmission ratio = (z2 z1) (z4 z3) (z6 z5) ......=（n1/n2）×（n3/n4）×(n5/n6)……

The maximum and minimum gear ratios of the car.

1. Determination of the maximum transmission ratio.

1. The maximum transmission ratio is the total transmission ratio of the drive train when the car is 1st gear, because the transmission ratio of the main reducer is fixed, usually the car does not have a transfer case and wheel side reducer, therefore, as long as the 1st gear transmission ratio is determined.

2. The maximum climbing, the power factor of the first gear, the adhesion and the minimum stable speed of the car are the constraints of the maximum transmission ratio.

Second, the selection of the minimum transmission ratio.

Drivability refers to acceleration, torque response of the power plant, noise and vibration.

1. The large displacement engine provides larger, faster and more stable torque response. The torque response of the front-drive drivetrain is better than that of the front-rear drive.

2. The minimum transmission ratio is too small, the car works under heavy load, the acceleration is not good, and noise and vibration occur.

3. The minimum transmission ratio is too large, the fuel economy is poor, and the noise of the engine running at high speed is large.

Transmission ratio: the ratio of the angular velocity of the two rotating members in the mechanism.

The transmission ratio refers to the speed ratio or angular velocity ratio between the first main transmission wheel and the most unrated driven wheel.

A transmission ratio greater than 1 is a deceleration (or deceleration).

The transmission ratio is less than 1, which belongs to the speed increase (or speed).

Huayuan Power Equipment, Zherong County, Fujian Province.

Definition: The ratio of the angular velocity or rotational speed of the starting driving wheel to the end driven wheel in a mechanical drive system.

Transmission ratio principle.

The ratio of the instantaneous input speed to the output speed in the mechanism is called the transmission ratio of the mechanism. The ratio of the angular velocity of two rotating members in the mechanism is also called the speed ratio. The transmission ratio of component a and component b is = a b=na nb, where a and b are the angular velocities (radian seconds) of components a and b respectively; Na and Nb are the rotational speeds of components A and B, respectively** minutes) (Note:

and n after a and b for the foot mark). When the angular velocity in the formula is instantaneous, the obtained transmission ratio is instantaneous. When the angular velocity in the formula is the average value, the obtained transmission ratio is the average transmission ratio.

For most gear drives with correct tooth profiles, the instantaneous gear ratio is constant, and for chain drives and non-circular gear drives, the instantaneous gear ratio is variable. For meshing transmission, the transmission ratio can be expressed by the number of teeth of A and B wheels ZA and ZB, i=ZB ZA; For friction transmission, the transmission ratio can be expressed by the diameter of the A and B wheels and B, i=B A. At this time, the transmission ratio is generally an expression of the average transmission ratio.

In hydraulic transmission, the transmission ratio of hydraulic transmission elements generally refers to the ratio of turbine speed and pump wheel speed b, that is, = b. Hydraulic transmission elements can also be combined with mechanical transmission elements (generally with various gear trains) to obtain a variety of different values of transmission ratios (see gear train for gear train transmission ratios).

The size of the gear ratio is determined according to the needs of the working machinery. Different gear ratios have different ranges. For first-stage transmission: spur gear ratio in 3 6;Bevel gears 2 3;Worm gear worm 10 40.

The calculation of the transmission ratio is the speed of a motor to decelerate to the speed required by the working mechanism, the transmission ratio = the use of torque 9550 motor power motor power input number of revolutions use coefficient, transmission ratio = driving wheel speed divided by the value of the driven wheel speed = the ratio of the reciprocal of their index circle diameter.

i.e.: i=n1 n2=d2 d1 i=n1 n2=z2 z1 for multi-stage gearing: 1

The transmission ratio between each two shafts is calculated according to the above formula. 2.The total transmission ratio from the first shaft to the nth shaft is equal to the product of the transmission ratios of each level.

If you want to be sure that the speed ratio is not enough for what you already know. At least know the modulus of the gears.

1.I don't know if the modulus is calculated to be an approximation.

2.Approximation of the calculation of the first stage gear ratio 54 24

3.The second stage has a gear ratio of 24 12 2

3.Input shaft output shaft gear ratio.

A gear is a wheel-shaped mechanical part that relies on the meshing of teeth to transmit torque.

By being driven with other toothed mechanical parts (such as another gear, rack, worm), the gear can change the speed and torque, change the direction of motion and change the form of motion. Due to the advantages of high transmission efficiency, accurate transmission ratio, and large power range, gear mechanism is widely used in industrial products, and its design and manufacturing level directly affects the quality of industrial products. The gear teeth are fastened with each other, and the gear will drive the other gear to rotate to transmit power.

By separating the two gears, you can also use chains, tracks, and belts to drive the gears on both sides to transmit power. <>