Electronic speed odometer has many advantages,so it gradually replaces the mechanical speed odometer driven by the soft shaft. But at present,the electronic speed odom eter still has a large room for improvement. Now ZHAOWEI micro gearbox can better control the instrument,beats of the stepping motor during the use, the jitter of the pointer and reduce the noise problem during the use of the product.
With the wide application of the latest digital electronic systems and computer technology in automotive engines and vehicle control systems, manufacturers are actively promoting the development and production of electronic display systems.In the mass production process of automobile instruments, new problems have also appeared, that is, the beating of the stepping motor during the use, the jitter of the pointer and the noise problem during the use of the product.
Electronic speed odometer and mechanical speed odometer
Modern car is moving at a high speed, and the odometer driven by a soft shaft is facing unprecedented challenges. The soft shaft rotates at high speed, The hysteresis of its movement is limited by the alternating stress of the steel wire.The high-speed vehicle often causes the fatigue of the soft shaft of the steel wire to break, thus invalidating the function of the odometer. Therefore, more electronic speedometers are now used.Electronic speed odometer has the same functions as mechanical speed odometer,but their principles are fundamentally different.The electronic speedometer is driven by a stepper motor to drive a mechanical mileage recording mechanism (counter) and the stepper motor is controlled by the output signal of the Hall sensor mounted in the gearbox.
The stepper motor is driven by a special integrated circuit, and the amount of rotation of the stepper motor is in a certain speed ratio relationship with the amount of rotation of the output shaft of the transmission.Therefore,electronic speed odometer has many advantages,so it gradually replaces the mechanical speed odometer driven by the soft shaft.
The stepper motor rotates a step angle every time it receives a driving pulse signal,driving micro gear to rotate..so the stepper motor and micro gears must have high-precision,small volume,large torque,stable output, and a wide range of reduction ratios to meet the different types of Instrument panel or electronic speed odometer.and our ZHAOWEI gear motor meets greatly these needs.
Instrument Panel GearBox
Miniature gearbox scheme
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