Couplings, also known as couplings, are mainly used to connect the transmission shafts of various mechanisms. Due to different mechanical equipment, the functions of various couplings are slightly different. For example, on a forklift, the coupling is used to transmit transmission and drive. The power between the bridges.

　　Couplings, also known as couplings, are mainly used to connect the transmission shafts of various mechanisms. Due to different mechanical equipment, the functions of various couplings are slightly different. For example, on a forklift, the coupling is used to transmit transmission and drive. Power between the bridges. Due to the short longitudinal dimension of the drive train, forklifts below 3t generally adopt a rigid connection structure, that is, bolts are used to connect the engine-clutch-transmission-coupling shell-drive axle. It is also a rigid whole from the engine to the drive axle. The middle part of the whole adopts a gear coupling. For forklifts above 5t due to the longer longitudinal dimension of the transmission system, universal joints are generally used.The power is transmitted to the drive axle of the forklift via the coupling.

　　The gear coupling consists of two coupling discs, which are connected by their inner and outer teeth.The coupling disc with internal and external teeth is connected with the transmission and the drive axle through splines or keys.

　　1) If the spline teeth on the gear are damaged and the fit clearance is greater than 0.4mm, they should be replaced.

　　2) When the keyway on the gear is damaged, the keyway can be enlarged and replaced.Or insert another keyway at 60° from the original keyway.

　　3) When the gear coupling is adjusted, the coaxiality of the two shafts should not be greater than 0.4mm