What is the return clearance of the planetary reducer?

The backlash refers to the gap between gears and gears, which is generally known as clearance, also known as backlash. The return clearance is a performance parameter of the planetary gearbox. Generally, the lower the return clearance, the higher the transmission accuracy of the planetary reducer, and the more expensive the planetary reducer is and the higher its transmission efficiency.

The unit of the return clearance is arcmin, generally called less than 3 is called high-precision type, and more than 15 is low-precision type.

1-3 arcmin (P1 -5 arcmin (P2 -8 arcmin (P3))

Planetary reducer is a kind of deceleration transmission equipment that is widely used; The accuracy of planetary gear transmission depends on the coordination between gears. Clearance refers to the gap between gears and gears, generally known as return clearance, also known as backlash. The lower the value of the return clearance (or backlash, clearance) in the performance parameters of the Bagman planetary reducer, the higher the transmission accuracy, the more expensive and the higher the transmission efficiency (the unit is arcmin, generally called less than 3 is called type, and more than 15 is low-precision type).

Return clearance: fix the input end, rotate the output in clockwise and counterclockwise directions, when the output end bears plus or minus 2% of the rated torque, the output end of the reducer is displaced by a small angle, this angular displacement is the return clearance, also known as "backlash". The unit is "arc minute", which is 1 60 of one degree.

The clearance is the gap between the gears and the gears, which is generally called the return clearance, also known as the backlash. The lower the value of the return clearance (or backlash, clearance) in the performance parameters of the planetary reducer, the higher the transmission accuracy, the more expensive and the higher the transmission efficiency (the unit is arcmin, generally called less than 3 is called high-precision type, and more than 15 is low-precision type).

Return clearance: fix the input end, rotate the output in clockwise and counterclockwise directions, when the output end bears plus or minus 2% of the rated torque, the output end of the reducer is displaced by a small angle, this angular displacement is the return clearance, also known as "backlash". The unit is "arc minute", which is 1 60 of one degree.

Planetary reducer precautions.

The planetary gear reducer should be firmly installed on a stable level foundation or base, the oil in the drain groove should be able to be discharged, and the cooling air should circulate smoothly. The foundation is unreliable, and it will cause vibration and noise during operation, and cause damage to bearings and gears.

When the transmission coupling has protrusions or gears and sprockets are used for transmission, the installation of protective devices should be considered, and the reinforced type should be selected when the output shaft bears a large radial load.

Planetary reducer.

The return clearance is to fix the input end, rotate the output in clockwise and counterclockwise directions, and when the output end produces 2% of the rated torque, there is a small angular displacement at the output end of the reducer, and this angular displacement is the return clearance. The unit is "arc minutes" (i.e. 1 60 of 1 degree).

Referring to the backlash, I can make worm gears.

I'll count the number of teeth, and I can only tell you the result.

Gear ratio = motor output revolutions reducer output revolution ("Gear ratio"Also called"Gear ratio")1.Know the motor power and speed ratio and the use factor, and find the reducer torque as follows: reducer torque = 9550 motor power motor power input speed ratio use coefficient 2

Know the torque and the output speed of the reducer and the use coefficient, and find the motor power required by the reducer as follows: motor power = torque 9550 motor power input speed ratio Use the coefficient motor torque to calculate the "torque" of the motor using the factor motor torque, the unit is n m (Nm), the calculation formula is t = 9549 * p is the rated (output) power unit of the motor is kilowatt (kW), the denominator is the rated speed, n unit is revolution per minute (r min) p and n can be found directly from the motor nameplate. Set:

The rated power of the motor is p (kw), the speed is n1 (r min), the total transmission ratio of the reducer is i, and the transmission efficiency is u. Then: Output torque = 9550*p*u*i n1 (Definition calculation method:

Reduction ratio = input speed Output speed. 2. General calculation method: reduction ratio = use torque 9550 motor power, motor power input number of revolutions, use coefficient, MB continuously variable speed transmission precautions.

3. Gear train calculation method: reduction ratio = number of driven gear teeth number of driving gear teeth (if it is a multi-stage gear reduction, then the number of driven gear teeth of a pair of gear sets that are meshed together The number of driving gear teeth, and then multiply the results obtained, NRV reducer. 4. Calculation method of reduction ratio of belt, chain and friction wheel:

Reduction ratio = driven wheel diameter driving wheel diameter, helical gear reducer, cycloidal pinwheel reducer how to add lubricating oil.

1. Ratio of speed = motor output speed reducer output speed ("Gear ratio"Also called"Gear ratio"2. Know the motor power and speed ratio and use coefficient, and find the reducer torque as follows: reducer torque = 9550 motor power motor power input speed ratio use coefficient 3, know the torque and reducer output speed and use coefficient, find the reducer required with the motor power as follows: motor power = torque 9550 motor power input speed ratio use factor.

Zhaowei Electromechanical).

1. Define the calculation method: reduction ratio = input speed output speed. Refers to the ratio of the input speed and the output speed of the connection, if the input speed is assumed to be 1500r min, and its output speed is 25r min, then its reduction ratio is:

i=60:1。

2. Gear train calculation method: reduction ratio = number of driven gear teeth number of driving gear teeth (if it is a multi-stage gear reduction, then the number of driven gear teeth and the number of driving gear teeth of any pair of gear sets that can be meshed together, and then the results can be multiplied.)

3. Calculation method of reduction ratio of belt, chain and friction wheel: reduction ratio = diameter of driven wheel and diameter of driving wheel.

1.Static measurement: It refers to the measurement of the hysteresis of the output end on the rotation angle when the direction of motion changes from the definition of the precision reducer in the stationary state, mainly including the polyhedral method and the hysteresis curve method.

2.Polyhedral method: the angle measuring device, self-collimating collimator, multi-faceted prism and the like are used to measure the return difference of the precision reducer, the goniometric device is installed on the input shaft during measurement, and the angle of the input shaft is collected through the acquisition card, the polyhedral prism is fixed on the output shaft, one face of the vertical polyhedron of the self-collimating collimator is adjusted, and the polyhedron is observed and positioned.

When the forward rotation of the input shaft is changed to reverse rotation, the difference between the two limit rotation angles divided by the transmission ratio is the output shaft difference.

3.Dynamic measurement: refers to the dynamic continuous measurement of the return difference of the precision reducer in the operating state close to the precision reducer, and the main measurement method is the bidirectional transmission error method.

4.Hysteretic curve method: due to the coupling effect of internal clearance, elastic deformation, friction, etc., the hysteresis characteristics are common in precision reducers, which are usually manifested as the inconsistency of the corresponding output of the system in the forward and reverse strokes, and the clearances shown in the reducer and gear auxiliary transmission can be regarded as a special case of hysteresis phenomenon.

At present, researchers mainly analyze and model the hysteresis characteristics of precision reducers from the perspective of motion control. In the industrial field, the hysteresis curve method is usually used to measure the return difference of the precision reducer, and the geometric return difference of the precision reducer is defined as: when 3% of the rated torque is applied to overcome the internal friction and oil film resistance, and the parts are in good contact, the output shaft rotation angle value caused by geometric factors such as tooth side clearance and bearing clearance in the transmission chain, also known as idle return or clearance return.

When measuring, one end of the precision reducer is locked, and the other end is loaded to the rated torque in a positive gradient, and then the gradient is unloaded; In the same way, reverse gradient loading and unloading are done, torque and torsion angle signals are collected in real time, and hysteresis curves are plotted.

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First, the choice of the speed ratio of the planetary reducer:

When choosing a planetary reducer, first of all, the reduction ratio should be clarified, after determining the reduction ratio, please multiply the rated torque of the servo motor you choose by the reduction ratio, and the value obtained should be less than the rated output torque of the similar reducer provided by the product sample in principle, and also consider the overload capacity of the drive motor and the maximum working torque required in practice. The maximum operating torque required should be less than 2 times the rated output torque.

Second, the choice of the accuracy (return clearance) of the planetary reducer:

Bupermann planetary reducer bearings will have corresponding changes in their clearance in different states, specifically, it can be divided into:

1) Original clearance: The original clearance of the bearing refers to the clearance in the free state after the complete set of bearings installed in the machine. In fact, the original clearance is difficult to know without being measured.

Therefore, the original clearance is often replaced by a test clearance. The clearance test is the clearance data detected by the instrument under the condition of applying the measurement load in the inspection state, which is not the same as the original clearance of the bearing, but in general, the two are not much different in reading, so they can replace each other without much error.

2) Effective clearance: Effective clearance or working clearance refers to the actual clearance in the bearing after the anchor is installed on the main engine, under a certain load, and under a certain temperature rise and stable operation state. Obviously, the effective clearance is smaller than the original clearance.

1. Save materials, reduce weight, and try to adopt cross-sectional shapes with equal strength dimensions or large cross-sectional coefficients;

2. It is easy to accurately position, stabilize, assemble, disassemble and unload and adjust the parts on the shaft;

3. Adopt various structural measures to reduce stress concentration and improve strength;

4. It is easy to process and manufacture and ensure the accuracy of the spring.

According to the statistics of Bapman planetary reducer, the market share of servo reducer is getting higher and higher, and we all know that the transmission efficiency of servo reducer is the highest. The problem of servo reducer clearance is also a concern of many people, and how to avoid this problem.

Servo clearance, simply put, that is, the output of the servo box is fixed, and the input terminal rotates clockwise and counterclockwise, so that there is a small angular displacement at the input end of the output servo reducer of the rated torque + 2 and 2, and this angular displacement is **. The unit is "minutes", which are sixty per year.

If the requirements for the return clearance are relatively high, it is recommended to use a precision servo planetary reducer or a harmonic servo reducer. The biggest feature of precision servo planetary reducer is high precision and transmission capacity, which can be equipped with a DC motor, single-phase motor, synchronous motor, if there is no strict requirement for clearance, you can choose ordinary servo reducer.