Seat Rail Clutch Drum Mechanism for Rapid Slide and Locking
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Solution Overview
Problem
Existing power-driven seat rails for vehicles lack a control device to quickly move or stop the vehicle seat, making it difficult to manage seat position effectively.
Innovation Solution
An apparatus with a spur gear, pinion pin, and clutch drum system that includes locking members and coupling protrusions to control power transmission between the rack and spur gears, allowing for precise control of seat movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a power-driven seat rail without a control device is used, then the structure is simple, but it is difficult to quickly move or stop the vehicle seat
Solution Approach 1:
The clutch drum acts as an intermediary device between the motor and the spur gear. It includes coupling protrusions that can engage with or disengage from the spur gear's inner diameter, enabling quick engagement and disengagement of power transmission. This mediator allows rapid control of seat movement without requiring complex braking systems or multiple control mechanisms.
Solution Approach 2:
The clutch drum is designed to be movable along the pinion pin, transitioning between engaged and disengaged positions. The coupling protrusions can dynamically engage with the spur gear to transmit power for seat movement, or disengage to stop movement quickly. This dynamic mechanism enables rapid response for seat position control while maintaining structural simplicity.
2Reliability
If the clutch drum is engaged to prevent power transmission, then seat position is fixed, but the locking members must be reliably released for movement
Solution Approach 1:
The coupling protrusions on the clutch drum serve as intermediaries that physically block or allow power transmission to the spur gear. When engaged, they reliably prevent the spur gear from rotating, fixing the seat position. When disengaged, they allow free rotation for movement. This mechanical intermediary provides both reliable locking and easy release without complex control systems.
Solution Approach 2:
The clutch drum is segmented with multiple coupling protrusions positioned at specific intervals. These protrusions can selectively engage with corresponding features on the spur gear, providing discrete locking positions. The segmentation allows for reliable position holding while enabling smooth transitions between locked and unlocked states through simple axial movement of the clutch drum.
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
Enhances passenger satisfaction by diversifying seat sliding methods and enabling a walk-in function through controlled power transmission, improving seat rail operation.
Implementation Method 1
a clutch drum (40) coupled to one end of the pinion pin (30) and configured to be elastically supported by an elastic member (60)
Data Source
AI summary
An apparatus for moving a seat rail for a vehicle includes a spur gear configured to be movable along a rack gear and having at least one locking member, a pinion pin having one end inserted into an inner-diameter portion of the spur gear to support the locking member, and a clutch drum configured to interrupt transmission of power to the spur gear.