Steering drive device for automobile headlight

Abstract

The invention relates to a steering drive device for a automobile headlight, which is installed on a light bracket and connected with a light cover, and comprises an upper box cover, a lower box cover, a gear drive mechanism, a direct current stepping motor and a drive output shaft, wherein the gear drive mechanism is arranged in the box cover; the direct current stepping motor is arranged outside the box cover; and the drive output shaft extends out from the box cover. The invention is characterized in that the gear drive mechanism comprises at least two groups of coaxial different-mode gears, the direct current stepping motor drives the first group of the coaxial different-mode gears through a main gear, the first group of the coaxial different-mode gears is meshed with the second group of the coaxial different-mode gears, the second group of the coaxial different-mode gears is then meshed with an annular internal tooth gear, and the axis line of the rotate shaft of the direct current stepping motor and the axis line of the drive output shaft are in the same straight line. By the structure, the invention has the advantages of space saving, compact structure, large drive output torque, stable drive output and the like, and can be widely applied to self-adapting headlight lighting systems of various automobiles.

Description

technical field [0001] The invention relates to the technical field of vehicle headlight systems, in particular to a vehicle light steering transmission device of an adaptive headlight lighting system. Background technique [0002] In order to improve the safety of automobile running, an adaptive headlight lighting system, called AFS for short, is proposed in the industry, which follows the steering angle of the steering wheel and the high and low azimuth angles of the body suspension system to rotate left and right and up and down. The direction of headlight irradiation is not only in the direction of straight-line driving, but also in the direction of the driver's steering operation, which plays a great role in improving the safety of the car. In this adaptive headlight system, the steering gear plays an important role, and the stability and durability of the steering gear are especially important. In conventional drive transmissions, a motor is the power source, and a ge...

AI Technical Summary

Problems solved by technology

Through such a step-by-step superimposed gear transmission method, the rotational torque is always transmitted to the transmission output shaft. The transmission output shaft is driven by one of the slave gears. The selected slave gear can achieve the required transmission ratio, but it is limited by the space volume of the frame. limit, the transmission ratio of the gear is not high

The axis of the main gear and the axis of the slave gear and its transmission output shaft are misaligned and parallel to each other---not on the same straight line. The structure of the gear transmission mechanism in this way is not very compact, and the transmission output is driven by only one slave gear, which causes the transmission The process is not very stable and the rotational torque is not large enough

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