With the rapid development of the planet technology, planetary gear motor with its small volume, light weight, compact structure, large capacity, high transmission efficiency, stable operation, impact resistant capability is strong, large transmission ratio, and can realize motion synthesis and decomposition of such outstanding characteristics, for planetary gear motor has been widely used in various industries.
In modern planetary transmission, it is necessary to improve the service performance of involute cylindrical gear under heavy load in order to meet the requirements of heavy load in order to meet the requirements of small service performance under heavy load conditions and improve the bearing capacity of reducer motor. In heavy duty gear transmission, internal and external meshing gear pair must meet the requirements of strength life and meshing quality. Therefore, according to the actual production, the following points are put forward in order to meet the life and quality of the internal and external meshing gear pair of the heavy-duty gear of the planetary reducer motor.
1, increase tooth width: at constant demand drive outside diameter, increasing internal gear width, can effectively increase the bearing capacity of the gear, and improve the deceleration of the motor load torque, at the same time, can reduce the unit in accordance with constant torque, reduce the deflection of gear teeth, reduce noise, reduce noise.
2, circular arc gear transmission: it is a helical gear transmission, a form of cylindrical gear transmission, with high bearing capacity, low production cost, simple manufacturing process, long service life and other advantages.
3. Increase the gear modulus and increase the tooth shape Angle: to maintain the same size of the outer diameter of the reducer motor, the bearing capacity needs to be increased, which can be met by increasing the gear modulus reasonably and reducing the number of gear teeth. Large modulus gears can improve the bending strength of gears, which is an important index of the bearing capacity of gears.
4. Increase the allowable contact stress of gear ring: in the planetary reducer transmission, the hardness of inner gear ring is often lower than that of outer gear, the material is not the same, and the processing and heat treatment process also has a gap. Planetary reducer check strength is usually check the sun wheel - planetary wheel transmission contact stress (to meet the transmission contact stress is less than the sun wheel planetary wheel allowable contact stress); The bending stress of the sun wheel and planet wheel (the bending stress is less than the allowable bending stress); Planetary gear - internal gear transmission contact stress (meet the transmission contact stress is less than the allowable bending stress of planetary gear ring). The allowable contact stress of gear ring is usually the first failure. Therefore, in order to increase the bearing capacity, it is necessary to ensure the allowable contact stress of gear ring.