Patent ID: 11883340
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A  F

Claim 2:
3. The mechanical type lifting shifter of claim 2; wherein the pair of connecting mechanisms each comprises a rotating plate, at least a pair of first steel balls, a roller bearing, and a connecting plate, provided on a side of a corresponding large bevel gear; wherein the second pedal is in transmission connection with the rotating plate, and at least a pair of steel ball grooves is provided on the rotating plate; the steel ball grooves on the rotating plate on a side of a corresponding large bevel gear and the steel ball grooves on the rotating plate on a side of another large bevel gear are distributed in mutually staggered positions; the rotating plate is arranged between the first steel balls and the roller bearing, and the connecting plate is arranged between the roller bearing and the large bevel gear; the second pedal drives both rotating plates of the pair of connecting mechanisms to rotate so that the first steel balls of one of the connecting mechanisms slide into the corresponding steel ball grooves on the rotating plate of said one of the connecting mechanisms and the first steel balls of another one of the connecting mechanisms slide out of the corresponding steel ball grooves on the rotating plate of said another one of the connecting mechanisms; the first steel balls sliding out of the corresponding steel ball grooves abut against the corresponding rotating plate to push the corresponding connecting plate to fixedly connects with a corresponding large bevel gear of the same side, and the connecting plate is coaxially connected and fixed with the linkage shaft to drive the corresponding large bevel gear to rotate with the linkage shaft.