Vehicle Lamp Positioning Mechanism to Prevent Thread Overload
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Solution Overview
Problem
Existing lighting body positioning devices are prone to thread overload and fracture due to the circular motion of the tongue and thread, leading to device failure.
Innovation Solution
A device with a force-locking joint connecting the light module to a follower, utilizing bevelled gears and a fork-like structure with fine threads to transfer motion and prevent thread overload, allowing the light module to be positioned without damaging the threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tongue with thread is moved along a circular arc together with the case, then the case can be adjusted, but the thread experiences significant load leading to fracture and device failure
Solution Approach 1:
The patent divides the adjustment mechanism into two independent parts: a first adjustment mechanism for horizontal positioning and a second adjustment mechanism for vertical positioning. Each mechanism has its own actuator and threaded connection, separating the adjustment functions that were previously combined in a single tongue mechanism. This segmentation prevents the thread from experiencing compounded loads from circular motion while maintaining full adjustability.
Solution Approach 2:
The patent replaces the static circular arc motion with dynamic independent linear adjustments. The first actuator moves the light source horizontally along the optical axis, while the second actuator moves it vertically. This dynamic separation of adjustment directions eliminates the circular arc path that caused thread overload, allowing each threaded connection to operate independently with reduced stress.
2Manufacturing precision
If the threaded section length is made sufficient to engage both threaded plates, then positioning precision is improved, but the actuator cannot rotate when threads are overloaded
Solution Approach 1:
The patent segments the positioning function into two independent adjustment mechanisms, each with its own actuator and threaded connection. The first actuator controls horizontal position through one threaded connection, while the second actuator controls vertical position through another threaded connection. This segmentation ensures that each actuator operates independently with sufficient thread engagement for precision without the risk of overload from combined circular motion, maintaining both positioning precision and actuator rotatability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively protects the threads from overload, ensuring the lighting module can be precisely positioned without thread damage, maintaining device functionality and extending its lifespan.
Implementation Method 1
the transfer means being selected as a pair of bevelled gears 10, 11
Implementation Method 2
a threaded section 14 of the actuator 8, 9 is formed in the region of the two neighbouring fixing means 6 with a threaded section 14 provided for mating and cooperating with said follower 7
Implementation Method 3
Said device 4 for positioning the light module 2 is connected with said follower 7 by means of a force-locking joint and/or a form-locking joint
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention refers to a device for positioning a lighting body, in particular a lighting body of a vehicle, such as a headlamp, a fog lamp and similar. Said device (4) for positioning a light module (2) is formed of at least two actuators (8, 9) set at an angle with respect to each other and mutually cooperating, and a follower (7) associated with said light module (2). Said device (4) for positioning the light module (2) provides for the lighting module (2) to be positioned in the case (1) of the lighting body (2), thus protecting the elements of the lighting body against the overload in the terminal positioning region. Said protection is achieved in a manner, that said shifting section (15) which is associated with each end of the threaded section (14) is pushed, in each extreme rotated position of the fork-like structure (18) and with continuous entering of torque into the actuator (8), between the threaded plates (19, 20).