A multi-link driven adaptive headlight transmission device and its control method for automobiles

By designing a multi-bar parallel transmission structure and a failure protection bar, the mechanical strength and vibration resistance issues of the adaptive headlight system were solved, enabling partial adaptive lighting functionality in the event of motor failure and improving the system's reliability and stability.

CN116198411BActive Publication Date: 2026-08-14ANHUI POLYTECHNIC UNIV
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Patent Information

Application Number
CN202310229722.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-10
Publication Date
2026-08-14
Estimated Expiration
2043-03-10

AI Technical Summary

Technical Problem

Existing adaptive headlight systems are inadequate in terms of mechanical strength and vibration resistance, and cannot maintain normal lighting function if one of the transmission structures is damaged.

Method used

It adopts a multi-bar parallel transmission structure and a fail-safe rod, and transmits torque simultaneously through multiple angle-adjustable push rods to increase mechanical strength and vibration resistance stability. In the event of a motor failure, the fail-safe rod pulls the headlight assembly to reset.

Benefits of technology

The mechanical strength and vibration resistance of the adaptive headlights have been improved, ensuring that they can still provide partial adaptive lighting even in the event of motor failure. This has reduced the number of parts and cost of the transmission mechanism and improved the stability of the lighting.

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Abstract

This invention discloses a multi-bar driven adaptive headlight transmission device and its control method, relating to a vehicle adaptive lighting system. The device includes a multi-bar driven angle adjustment assembly, a headlight assembly, and a fail-safe rod. The multi-bar driven angle adjustment assembly comprises at least three sets of angle adjustment push rods. Each push rod includes a base, a movable end, and a drive mechanism that drives the movable end to move axially relative to the base. The push rods are circumferentially and evenly arranged around the headlight assembly, and their movable ends hinged to support the headlight assembly. The bases of the push rods are hinged and fixed in the same plane. This invention employs a multi-push rod parallel transmission structure, which greatly enhances mechanical strength and vibration resistance. There is no accumulated transmission error, resulting in high motion accuracy. Furthermore, if the motor of one push rod fails, the adaptive lighting function can be partially restored through motion compensation from other push rods. It also has a fault reset function.
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