Micro gear motors are widely used in products with high torque and low speed, such as electronic locks, smart cars, 3D printing pens and other fields. Micro gear motors have the advantages of high torque and high precision. , Bearing has a very key role, the following Tianfu micro motor briefly introduces the classification and function of micro gear motor bearings.
Micro gear motor output shaft and input shaft
1. The output shaft of the miniature geared motor is the shaft connecting the geared motor and the transmission mechanism. Generally, the output shaft is made of metal material, and the common shapes are circular shaft, D-shaped shaft, flat shaft, square shaft and so on.
2. The input shaft is the transmission shaft connecting the micro motor and the reducer. The input shaft of the micro motor has high rotational speed and low torque. The input shaft is generally a D-shaped shaft.
The role of the transmission shaft of the miniature gear motor
1. Transmission power;
2. Input\output speed;
3. Drive the load.
Planetary gear motor bearing selection method
1. Common bearings include spherical roller bearings, single-row and double-row tapered roller bearings, double-row cylindrical roller bearings, four-point contact ball bearings, ball bearings, etc.;
2. The primary selection of bearing specifications is to determine the inner diameter of the bearing according to the determined shaft diameter. The input shaft speed is relatively high, and the specification with larger load capacity in the same inner diameter should be selected. The meshing force of two pairs of gears on the intermediate shaft acts on the bearing. If the conformity is larger, the specification with the larger load capacity in the same inner diameter should also be selected;
3. The speed of the output shaft is low and only the meshing force of a pair of gears acts on the shaft and the bearing. The bearing with the same inner diameter and medium load capacity can be selected. However, if the output shaft is rigidly connected to the main shaft of the machine and has impact, it should be Choose a bearing with a larger load capacity.
Note: If the concentricity of the output assembly of the micro gear motor is not good, the output force is not enough, and the load is too large, the micro gear motor shaft will be broken.
