With the wide application of the latest digital electronic systems and computer technologies in automobile engines and vehicle control systems, manufacturers are turning into the development and production of electronic display systems. During the mass production of automobile instruments, new problems have occurred, the jump of the stepper motor, the jitter of the pointer, and the noise during use.
Electronic Speed Odometer and Mechanical Speed Odometer
Modern cars are driving at high speeds, and odometers driven by flexible shafts face many challenges. The flexible shaft rotates at high speed, and its movement lag is limited by the alternating stress of the steel wire. High-speed vehicles are usually faced with the fatigue fracture of the steel wire, thereby making the steel wire invalid. Therefore, electronic speedometers generally gained popularity. The electronic speedometer has the same function as the mechanical speedometer, but the principle is fundamentally different. The electronic speed odometer adopts a stepper motor to drive the mechanical mileage recording mechanism (counter). The stepper motor is controlled by the output signal of the Hall sensor installed in the gearbox.
The stepper motor is driven by a special integrated circuit, and the speed of the stepper motor is associated with the speed of the output shaft of the gearbox. Therefore, the electronic speed odometer has many advantages, so it gradually replaced the mechanical speed odometer driven by the flexible shaft.
The stepper motor rotates a step angle every time it receives a driving pulse signal, thereby driving the micro gear to rotate. Therefore, stepper motors and micro gears should feature high accuracy, small size, high torque, stable output, and a wide range of transmission. ZHAOWEI gear motor can meet the requirements of different types of instrument panels or electric odometers.
ZHAOWEI micro-drive system can be applied to the stepper motor of the automobile instrument panel. By adjusting the structure and gear precision of the instrument panel gearbox, it can improve the jump of the stepper motor, the jitter of the pointer, and reduce the noise during use.
Instrument Panel GearBox
Miniature gearbox scheme
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