| 摘要 |
Electric bicycle central axle torque speed sense device comprises a central axle (4) assembled in a five-way tube, a left crank (13) and a right crank (14) fixed on each end of the central axle (4) and a chain wheel (16) sleeved on the central axle (4), and the device is characterized in that: the central axle (4) is sleeved with a torque sleeve (5) which can generate circumferential deformation when bearing circumferential torsional force, one end of torque sleeve (5) is fixed to the central axle (4), the other end is fixed to the chain wheel (16); a circle of magnetism conductive alloy sheet (20) arranged on and abut closely to the torque sleeve are fixed on the outer tube wall of said torque sleeve (5), the magnetism conductive alloy sheet (20) is densely provided with multiple holes (17), coils (19) used for detecting magnetism changes are arranged on the peripheries of the magnetism conductive alloy sheet (20), the coils (19) are connected to motor controller via a signal processor, a speed induction Hall (18) connected with said signal processor is further arranged in the five-way tube, and a speed induction magnetic steel (12) corresponding to the speed-sensitive Hall (18) is fixed on the central axle (6). The structure of the present invention is smart and reasonable in structure, and has induction sensitivity and high accuracy. |
