Integrated Vehicle Window Frame Rail to Prevent Noise and Motor Overload
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Solution Overview
Problem
Existing automatic window systems in small and medium-sized buses experience noise and motor overload due to misalignment between the carriage rail and the window frame, resulting from assembly tolerance, which affects the movement trajectory of the window.
Innovation Solution
The window frame and guide rail are integrally formed by extrusion molding to precisely align the movement trajectories, using a window sliding member with a slider and actuator driven by a motor, pulley system, and reducer to ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the carriage rail and window frame are separately assembled on the body chassis, then the assembly process is flexible and components can be manufactured independently, but the movement trajectories of the carriage and window frame become misaligned due to assembly tolerance, causing noise and motor overload
Solution Approach 1:
The guide rail is integrated directly into the window frame structure, forming a unified component. This merging eliminates the separate assembly of carriage rail and window frame, thereby removing the assembly tolerance that caused misalignment between their movement trajectories. The integrated design ensures precise alignment while maintaining manufacturing feasibility through modular construction.
2Ease of repair
If the carriage rail and window frame are separately assembled, then component replacement and maintenance are easier, but the misalignment causes noise during window opening and closing
Solution Approach 1:
The guide rail and window frame are combined into a single integrated structure, eliminating the relative movement and misalignment between separate components that generated noise. The unified design ensures smooth operation without noise while preserving maintenance capability through modular replacement of the entire window frame assembly.
3Adaptability or versatility
If separate components are used for carriage rail and window frame, then the system is more adaptable to different configurations, but the misalignment causes motor overload
Solution Approach 1:
The integration of the guide rail into the window frame eliminates misalignment between the carriage rail and window frame movement trajectories. This precise alignment reduces friction and mechanical resistance, thereby decreasing the force required by the motor and preventing overload conditions while maintaining system adaptability through modular design.
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
This integration prevents noise and motor overload, enhances durability, reduces component count, simplifies the structure, and achieves weight reduction.
Implementation Method 1
an actuator configured to drive the window sliding member... The actuator may include a motor, a worm rotated by the motor, a worm wheel engaged with the worm
Implementation Method 2
The actuator may include a driving pulley and a driven pulley spaced apart from each other in the first direction to drive the driving belt
Implementation Method 3
a reducer configured to reduce a speed of rotation of the worm wheel to transmit a force to the driving pulley
Data Source
AI summary
An automatic window opening and closing apparatus for a vehicle includes a window frame fixed at a body chassis and configured to support a window to slide in a first direction. The automatic window opening and closing apparatus further includes: a guide rail formed on a side surface of the window frame and extending along the first direction, a slider guided and moved by the guide rail while allowing the window to reciprocate in the first direction, and an actuator configured to drive the slider.