Electromagnetic actuator used for gear shifting of electric automobile

Abstract

The invention provides an electromagnetic actuator used for gear shifting of an electric automobile. The electromagnetic actuator comprises a shifting fork, an iron piece, a base, a tubular shell mounted on the base, side end covers for fixedly plugging the two ends of the shell, an iron core, and coils for sleeving the two ends of the iron core in a spaced mode; the coils are fixedly connected with the shell, two windows are formed in the side wall of the shell, and three notched optocouplers are fixedly arranged in one window in the axial direction and correspond to the first gear, the neutral gear and the second gear of the automobile; the shifting fork perpendicularly and fixedly penetrates through the iron core, one end of the shifting fork is fixedly connected with the iron piece, the other end of the shifting fork penetrates out of a gap of the other window, and the other end of the iron piece penetrates into a notch in one notched optocoupler in a spaced mode; and an electric control module comprises a single chip microcomputer, a relay, an audion, a diode and a switch, wherein the three PWM output ends of the single chip microcomputer are connected with the input ends of the first gear optocoupler, the second gear optocoupler and the neutral gear optocoupler correspondingly. The coils are controlled to be on or off by controlling the corresponding optocouplers to be on or off, electromagnetic force generated when the coils are electrified drives the shifting fork to move, and gear shifting is smoothly completed.

Description

technical field [0001] The invention provides an electromagnetic actuator for gear shifting of an electric vehicle, which belongs to the field of electric vehicles. Background technique [0002] Current low-speed electric vehicles generally use a power drive system composed of a motor and a final reducer, or some electric vehicles use increased voltage to climb or accelerate, which meets the basic driving requirements, but has low gradeability and poor acceleration performance. Therefore, electric vehicles still need a transmission system with variable speed ratio. Two-speed automatic transmissions are more and more widely used in electric vehicles. The first gear is suitable for working conditions such as climbing and accelerating, and the second gear is suitable for high-speed operating conditions of the vehicle. If the two-speed automatic transmission is manually controlled, the best switching between the two gears cannot be realized due to the driver's operation differe...

AI Technical Summary

Problems solved by technology

If the two-speed automatic transmission is manually controlled, the optimal switching between the two gears cannot be achieved due to the driver's operation difference

Images