A lifting device is arranged between a
bed board and a bottom frame, the lifting device comprises a bearing plate, a supporting mechanism and a safety lock, the supporting mechanism comprises vertical frames, air springs and connecting rod assemblies which are symmetrically arranged, the two connecting rod assemblies are connected through carrier rollers, the carrier rollers make contact with the bottom face of the bearing plate, and the safety lock is arranged on the supporting plate. One end of each
air spring is rotationally connected to the corresponding vertical frame, the other end of each
air spring acts on the corresponding connecting rod
assembly, the two vertical frames are fixed to the bottom frame, one end of the bearing plate is connected with the synchronous plate, the two sides of the synchronous plate are connected with the wing plates respectively, and the roller sets arranged on the synchronous plate and the wing plates can slide along the vertical frames; the safety locks are symmetrically arranged on the two sides of the bearing plate, each safety lock comprises a
ratchet strip and a bidirectional pawl mechanism, the
ratchet strips are fixed to the corresponding vertical frames, the bidirectional pawl mechanisms are rotationally arranged on the corresponding wing plates,
brake cables used for controlling bidirectional pawls are connected to the
brake handles, and the
brake handles are connected to the control plate. The transfer
bed is stable and comfortable in transfer and safe and reliable in locking.