Vehicle Seat Sliding Rail Gear Layout Against Foreign Matter
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Solution Overview
Problem
Existing sliding rail transmission devices in vehicles face challenges in ensuring stable and long-distance seat adjustment while preventing foreign matter from interfering with the transmission mechanism, which affects the reliability and durability of the system.
Innovation Solution
The proposed sliding rail transmission device incorporates a driving portion with a transmission gear that meshes with side-by-side arranged first and second transmission toothed belts, where the transmission gear is located below the belts to prevent foreign matter ingress, and includes a damping strip for vibration damping, enhancing the system's strength and tolerance adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission gear is positioned to mesh with the toothed belts, then the transmission function is achieved, but foreign matter can easily enter and interfere with the mechanism
Solution Approach 1:
The transmission gear is inverted from the conventional position above the toothed belts to below them. This inversion allows the gear to mesh with the underside of the toothed belts, creating a closed transmission space that prevents foreign matter from entering while maintaining effective power transmission.
2Strength
If a single toothed belt is used for transmission, then the structure is simple, but the strength and tolerance adaptation are insufficient
Solution Approach 1:
Two toothed belts are merged side by side to form a composite transmission structure. The first toothed belt carries the transmission gear on its underside, while the second toothed belt is positioned adjacent to it. This merging increases the overall transmission strength and provides better tolerance adaptation without significantly increasing structural complexity.
3Stability of the object's composition
If the movable member is directly supported on the rail, then the structure is simple, but vibration and instability occur during long-distance movement
Solution Approach 1:
A damping strip is introduced as an intermediary element between the movable member and the rail. This damping strip absorbs vibrations and provides stable support during long-distance movement, preventing the instability that would occur with direct contact while adding minimal structural complexity.
4Length of moving object
If long sliding rails are installed to meet seat adjustment requirements, then the seat movement range is increased, but the transmission device becomes more prone to failure
Solution Approach 1:
The transmission gear is inverted to mesh with the underside of the toothed belts, creating a protected transmission path that is less susceptible to contamination and failure over long distances. This inversion maintains reliability while enabling extended seat adjustment ranges.
Solution Approach 2:
The dual toothed belt structure merges two transmission paths, providing redundancy and increased reliability for long-distance seat adjustment applications. The combined structure distributes loads more evenly, reducing the risk of failure over extended travel distances.
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 configuration ensures stable and reliable long-distance seat adjustment by preventing foreign matter interference and providing effective vibration damping, thus improving the overall performance and durability of the sliding rail transmission device.
Implementation Method 1
the rail is provided with a damping strip at a position of the first transmission toothed belt, the damping strip forms a second transmission toothed belt
Data Source
AI summary
A sliding rail transmission device includes a driving portion and at least one sliding rail assembly, the sliding rail assembly includes a rail and a movable member, the rail is provided with a flanging, the flanging forms a first transmission toothed belt, and the rail is provided with a damping strip at a position of the first transmission toothed belt, the damping strip forms a second transmission toothed belt, the first transmission toothed belt and the second transmission toothed belt are arranged side by side, the movable member is provided with a transmission gear, the transmission gear is arranged below the first transmission toothed belt and the second transmission toothed belt, and the transmission gear can mesh with the first transmission toothed belt and the second transmission toothed belt simultaneously; and the driving portion drives the transmission gear to rotate to drive the movable member to move along the rail.