Constant-thrust and uniform-speed cutting orthopedic electric saw mechanism applicable to surgical robots

The invention relates to an executive device for surgical robots, particularly relates to a constant-thrust and uniform-speed cutting orthopedic electric saw, and belongs to the technical field of medical instruments. The constant-thrust and uniform-speed cutting orthopedic electric saw is characterized in that a saw blade 1 is fixed into a power rod 26, and a power wheel 4 is mounted via a mandrel 24 and a wheel axle 25; the power wheel 4 is arranged in a curved groove 27 of a rotary barrel 2; a guide key 9 in a guide groove 10 in the power rod 26 only can linearly move without rotating under the constraint effect of a through cover 8; when a motor 17 rotates, a synchronous toothed belt 23 can drive the rotary barrel 2 to rotate; the power wheel 4 linearly reciprocates along the curved groove 27; the curved groove 27 has a constant-speed cam curve, and accordingly the saw blade 1 moves at constant speeds; one end of a strain gauge seat 14 is connected with a connecting seat 16, the other end of the strain gauge seat 14 is connected with a fixing seat 11, and four strain gauges 13 are fixed to two sides of the strain gauge seat 14 by the aid of glue. The constant-thrust and uniform-speed cutting orthopedic electric saw has the advantages that resistance on the saw blade 1 when the saw blade 1 works can be sensed, feedback electric signals can be emitted and can be transmitted to a control system, accordingly, propulsion speeds of the constant-thrust and uniform-speed cutting orthopedic electric saw can be adjusted, and the constant-thrust purposes can be achieved.