The loads acting on the FYH block bearing include the gravity of the bearing support, the transmission power of gears or belts, and the load generated during mechanical operation. Since the bearing load is mostly variable, and the degree or magnitude of the change is difficult to determine, it is almost impossible to determine the bearing load through simple calculations. Therefore, the calculation of bearing load generally adopts the method of multiplying the theoretical calculation value by the empirical coefficient. The load acting on the bearing Although the radial load or axial load acting on the bearing can be calculated according to the general mechanical method, the actual load acting on the bearing is often larger than the calculated value due to mechanical vibration or shock. Therefore, when calculating Generally, the theoretical calculation value is multiplied by a load factor related to mechanical vibration or shock, as shown in the following formula. F u003d Fc In the above formula, F : Actual load acting on the bearing, N f w : Load factor (refer to Table 5.1). Load during belt or chain drive The theoretical load acting on the pulley shaft during pulley drive can be obtained by calculating the effective drive force of the belt. However, when calculating the actual load, it is also necessary to multiply the effective transmission force by the load factor (fw) which takes into account the vibrational shock in the mechanical movement and a factor related to the belt tension (fb). In addition, the chain drive also needs to be multiplied by a chain coefficient equivalent to the belt coefficient. Fb u003d f wf b2Dp19.1106WDpn u003d f wf b In the above formula, Fb : actual load of FYH pulley shaft or sprocket shaft, NM : torque of pulley or sprocket, mNmWDp : pitch diameter of pulley or sprocket, mmn : rotational speed, min-1 fwf b② Radial load of gear (separation force)③ Combined load of gear Fb u003d f wf b2Dp 19.1106W Dpn u003d f wf b19.1106 W Dpn t u003d u003d 2 MD Kr u003d Kt tan Kg u003d Kt 2＋Kr 2 u003d Kt sec In the above formula, Kt: tangential load of gear (tangential force), NKr: radial load of gear (separation force), NKg: combined load of gear, NM: torque of gear, mNmDp: diameter of gear pitch circle, mmW: transmitted power, kWn: rotational speed, min-1: gear pressure angle, in the above formula Fg: actual gear load, NKg: theoretical gear composite load, Nf w Table 5.3 Gear coefficient fg Gear type Precision gear 1 ~ 1.1 General Gear 1.1～1.3Fg u003d Kg: FYH bearing transmission power, kW: Load factor (refer to Table 5.1): Belt (chain) factor (refer to Table 5.2) However, when calculating the actual gear load, it is necessary to multiply the theoretical load by the consideration The load factor (fw) of vibration shock in mechanical operation and a gear factor (fg) related to gear accuracy. fg: Load factor (refer to Table 5.1): Gear factor (refer to Table 5.3) fg (pitch error and tooth profile error are less than 0.02mm) (pitch error and tooth profile error are both less than 0.1mm) 5 Bearing load f wf gp 5.1.3 Load table for gear transmission 5.2 Belt (chain) coefficient fb belt type 1.3 ~ 22 ~ 2.52.5 ~ 34 ~ 5 chain 1.2 ~ 1.5 fb toothed belt V-belt flat belt (with tensioner). The theoretical loads acting on the gear during gear transmission include tangential load (K t), radial load (K r) and axial load (K a). According to the transmission force of the gear and the type of gear, the mechanical method can be used to calculate . The most common spur gears are used as an example (there is no axial load in the case of spur gears).