| 摘要 |
Provided are novel electric supporting legs, comprising a left supporting leg, a right supporting leg, a middle shaft for connecting the left supporting leg and the right supporting leg and an electric driving mechanism. The electric driving mechanism comprises an electric motor, a shell (6), a front swing plate (8) and a poking rod mechanism. An output shaft (51), an output shaft gear (5), an input shaft (25) and an input shaft multi-speed-ratio gear (2) are installed in the shell. An electric motor shaft is coupled to a bevel pinion (1). The bevel pinion meshes with conical teeth of the input shaft multi-speed-ratio gear. A high-speed transmission gear (3) and a low-speed duplicate gear assembly (4) are installed on the front swing plate. The poking rod mechanism makes the front swing plate swing left and right with the input shaft as a fulcrum, so that the output shaft gear is in drive connection with the input shaft multi-speed-ratio gear through the high-speed transmission gear or the low-speed duplicate gear assembly, and the electric motor shaft provides power for the output shaft at different speed ratios. The input shaft multi-speed-ratio gear and the low-speed duplicate gear assembly are manufactured through powder metallurgy and pressure casting. The electric supporting legs are rational in structure and save on labour when operating. |
