Vehicle Sliding Door Three-Rail Stabilization Mechanism
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Solution Overview
Problem
Sliding doors in vehicles tend to sway during opening and closing, leading to gaps between the door and the door frame, which affects the vehicle's marketability and design freedom due to the limited number of support points in existing 2-rail systems.
Innovation Solution
A three-support-point system is introduced, featuring a center rail, a lower door rail, and a vehicle body rail with a pulley and speed reducer mechanism to stabilize the door, allowing it to open and close without swaying by using a second arm hinged to the speed reducer and a pulley system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a 2-rail sliding door system is used to reduce vehicle weight and component count, then the vehicle weight and number of components are reduced, but the door sways during operation causing gaps between the door and door frame
Solution Approach 1:
The patent adds a third support dimension by introducing an upper rail system with pulleys and cables, transforming the 2-rail system into a 3-rail system. This dimensional addition provides an extra support point that prevents door sway while maintaining the lightweight design philosophy.
Solution Approach 2:
The patent introduces intermediary components including pulleys mounted on the upper rail, cables connecting the pulleys to the door, and a speed reducer mechanism. These intermediaries transmit force from the motor to control door movement precisely, eliminating sway without requiring direct rigid connections that would increase weight.
2Device complexity
If a 2-rail sliding door system is used to simplify the structure, then the number of components is reduced, but the door sways during opening and closing operations
Solution Approach 1:
The patent adds a third support dimension by introducing an upper rail system with pulleys and cables, transforming the 2-rail system into a 3-rail system. This dimensional addition provides an extra support point that prevents door sway while maintaining the lightweight design philosophy.
Solution Approach 2:
The patent replaces traditional direct mechanical linkages with a cable-pulley system actuated by a motor and speed reducer. This substitution allows for precise control of door movement with fewer rigid components, maintaining simplicity while achieving stability.
3Stability of the object's composition
If traditional rail mounting is used to ensure stable door operation, then door stability is maintained, but the vehicle weight increases and design freedom deteriorates
Solution Approach 1:
The patent introduces intermediary components including pulleys mounted on the upper rail, cables connecting the pulleys to the door, and a speed reducer mechanism. These intermediaries transmit force from the motor to control door movement precisely, eliminating sway without requiring direct rigid connections that would increase weight.
Solution Approach 2:
The patent replaces traditional direct mechanical linkages with a cable-pulley system actuated by a motor and speed reducer. This substitution allows for precise control of door movement with fewer rigid components, maintaining simplicity while achieving stability.
4Stability of the object's composition
If a pulley and speed reducer mechanism is added to prevent door sway, then door stability is improved, but the device complexity increases
Solution Approach 1:
The patent replaces traditional direct mechanical linkages with a cable-pulley system actuated by a motor and speed reducer. This substitution allows for precise control of door movement with fewer rigid components, maintaining simplicity while achieving stability.
Solution Approach 2:
The cable-pulley system is designed to automatically maintain tension and guide the door along the correct trajectory through the geometry of the pulley arrangements and cable routing, reducing the need for additional control mechanisms and simplifying the overall system.
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 system prevents door sway, ensuring stable operation and eliminating gaps between the door and frame, while allowing for improved design flexibility by adjusting the door's operating trajectory.
Implementation Method 1
A pulley can be rotated in conjunction with a movement of the vehicle body rail slider
Implementation Method 2
A speed reducer is directly connected to the pulley and configured to reduce a rotational speed of the pulley
Implementation Method 3
A second arm is hingedly coupled to the speed reducer and configured to move the door rail slider
Data Source
AI summary
An apparatus for a vehicle includes a door rail configured to be installed on a door panel of a door, a vehicle body rail configured to be coupled to a vehicle body so as to be opposite to the door rail, a vehicle body rail slider coupled to one surface of the vehicle body rail so as to be slidable in a front-rear direction along the vehicle body rail, a door rail slider coupled to the door rail so as to be slidable in the front-rear direction along the door rail, a pulley rotatable in conjunction with a movement of the vehicle body rail slider, a speed reducer directly connected to the pulley, and a second arm hingedly coupled to the speed reducer and configured to move the door rail slider.