Adjustment Drive Safety Clutch With Tunable Haptic Damping
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Solution Overview
Problem
Existing adjustment drives in motor vehicles face challenges in achieving a balance between safety clutch protection and desired haptics during manual actuation, requiring repeated adjustments to meet haptic requirements in various end-user applications.
Innovation Solution
An adjustment drive with a safety clutch that separates the self-locking transmission stage from excessive torque, incorporating a compressible damping element in the free travel to enable customizable haptics, using a connection element between gearwheels with radially arranged damping elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety clutch is installed to protect the self-locking transmission from excessive torque, then the transmission reliability is improved, but the haptic quality during manual actuation deteriorates
Solution Approach 1:
The patent divides the clutch mechanism into separate functional components: a safety clutch element for torque protection and a damping element for haptic optimization. This segmentation allows each component to independently fulfill its specific function without compromising the other, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The damping element acts as an intermediary component between the safety clutch and the transmission stage. It mediates the interaction by providing controlled resistance during manual actuation while allowing the safety clutch to maintain its protective function, thus improving haptic quality without sacrificing transmission protection.
2Ease of operation
If the safety clutch is adjusted to optimize haptic quality during manual actuation, then the ease of operation is improved, but the transmission protection capability deteriorates
Solution Approach 1:
By separating the haptic optimization function (damping element) from the protection function (safety clutch), the patent eliminates the need to readjust the safety-relevant components. The damping element can be independently tuned for optimal haptics without affecting the transmission protection capability.
Solution Approach 2:
The haptic optimization function is extracted from the safety clutch mechanism and implemented through a separate damping element. This extraction allows the safety clutch to maintain its fixed protection settings while the damping element provides customizable haptic characteristics.
3Ease of manufacture
If standard transmissions are used in various end-user applications, then the manufacturing cost is reduced, but the adaptability to different haptic requirements deteriorates
Solution Approach 1:
The damping element serves multiple functions: it optimizes haptic quality during manual actuation, provides customizable characteristics for different applications, and maintains compatibility with standard transmissions. This universal component enables both standardization and adaptability simultaneously.
Solution Approach 2:
The patent enables haptic customization by changing the parameters of the damping element (such as damping coefficient, stiffness) without modifying the standard transmission components. This parameter adjustment approach maintains manufacturing efficiency while providing adaptability to different end-user requirements.
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 allows for flexible adaptation to different haptic settings without affecting the safety clutch's functionality, providing a consistent and customizable manual actuation experience.
Implementation Method 1
at least one compressible and/or elastic and/or resilient damping element is arranged in the free travel
Implementation Method 2
compressible damping element in the free travel
Implementation Method 3
compressible and/or elastic and/or resilient damping element
Implementation Method 4
compressible and/or elastic and/or resilient damping element
Data Source
AI summary
An adjustment drive that includes an electric motor, a transmission having a self-locking transmission stage, an output, and a safety clutch having a free travel. The safety clutch is operable to separate, in an event of an excessive external torque introduced via the output, the self-locking transmission stage from the external torque. The adjustment drive also includes at least one compressible damping element arranged in the free travel to enable haptics of an external movement demand introduced via the output.