Transfer LZJ (original ZLZ) type connection intermediate shaft flexible pin gear coupling of torque, the torque at the same time most of the gear coupling turning diameter smaller than small, light weight, can be partially replaced by tooth couplings; compared with gear coupling, simple structure, consisting of fewer parts, ease of manufacture, without gear cutting machines; easy maintenance, long life, remove the baffle can be replaced nylon studs. Nylon studs for self-lubricating material, no lubrication, not only to save oil, and purify the work environment. Disadvantages flexible pin gear coupling is poor damping kinetic energy, noisy. Although some compensation has two axes relative offset performance, but only for medium and large power transmission, does not apply to certain parts of the damping working requirements and require strict noise control