Vehicle Seat Adjusting Device Spring Torque Decoupling
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Solution Overview
Problem
Existing adjusting devices for motor vehicle seats are complex in construction, difficult to assemble, and require a large number of actuations for desired adjustments, while also allowing unwanted torques from the output to act on the drive means.
Innovation Solution
An adjusting device with a drive and braking system, where at least one spring means is arranged between the drive and the braking device to prevent torques from the output, allowing for simpler construction, reduced free play, and fewer actuations, with the spring moving the drive back into its starting position after each use, decoupling it from the braking device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a braking device is added to prevent torques from acting on the drive means, then reliability is improved, but device complexity increases
Solution Approach 1:
The spring means is integrated into the existing drive mechanism, combining the torque prevention function with the drive components. The spring is arranged between the drive and braking device, merging multiple functions into a compact arrangement that prevents unwanted torques without significantly increasing overall device complexity
Solution Approach 2:
The spring means acts as an intermediary element between the drive and braking device. It mediates the torque transmission by preventing unwanted torques from reaching the drive means while allowing the braking device to function properly, thus improving reliability without requiring a completely redesigned complex system
2Manufacturing precision
If the adjusting device requires more actuations for desired adjustment travel, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The spring means introduces dynamic characteristics to the adjusting device. During actuation, the spring can be compressed or extended, allowing for smoother torque transmission and more efficient conversion of input torque to output torque. This dynamic element enables the desired adjustment travel to be achieved with fewer actuations while maintaining manufacturing precision
3Ease of manufacture
If the construction is simplified, then ease of manufacture is improved, but device complexity must be reduced
Solution Approach 1:
The adjusting device is divided into distinct functional segments: the drive means, the spring means, and the braking device. This segmentation allows each component to be manufactured and assembled independently, simplifying the overall construction process and making the device easier to manufacture while maintaining clear functional separation
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 enables easier assembly and operation with fewer actuations, reduced free play, and complete elimination of torques from the output acting on the drive, enhancing the overall efficiency and reliability of the adjusting mechanism.
Implementation Method 1
The spring means preferably moves the drive back into a starting position after each actuation, particularly preferably immediately after each actuation
Data Source
AI summary
An adjusting device is disclosed for performing at least one adjusting function, such as in a vehicle seat. The device comprises a drive having a drive means and an output, a braking device that generally prevents torque from the output acting on the drive means. At least one spring is arranged between the drive and the braking device.