Integrated Encoder Coupling for Compact Vehicle Drive Assembly
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Solution Overview
Problem
Existing drive arrangements for motorized adjustment of adjusting elements in vehicles require significant installation space due to separate components for movement detection and coupling, which increases the overall size and complexity.
Innovation Solution
Integration of an encoder element with a coupling element to form a single component that combines movement detection and coupling functions, reducing the axial dimensions and necessary installation space by using a movement detection device with a sensor and encoder element for rotational movement detection and coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components for movement detection and coupling are used, then functional reliability is improved, but installation space increases
Solution Approach 1:
The encoder element and coupling element are merged into a single integrated component that performs both movement detection and mechanical coupling functions. The encoder element is arranged on the coupling element such that they rotate together with the driveshaft, combining the rotational detection function with the torque transmission function in one unified structure, thereby reducing installation space while maintaining functional reliability
Solution Approach 2:
The integrated encoder-coupling component serves multiple functions simultaneously: it detects rotational position and movement through the encoder element while also transmitting mechanical torque through the coupling element. This multi-functionality eliminates the need for separate components, directly addressing the space constraint without compromising the reliability of either detection or coupling function
2Reliability
If separate components for movement detection and coupling are used, then functional reliability is improved, but device complexity increases
Solution Approach 1:
By merging the encoder element and coupling element into one integrated component, the number of separate parts is reduced. The integrated structure requires fewer assembly steps, fewer mounting locations, and simpler alignment procedures compared to installing separate detection and coupling components, thereby reducing device complexity while preserving the reliability benefits of having both functions present
3Volume of moving object
If integrated encoder and coupling elements are used, then installation space is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The integrated component is designed with functionally segmented zones: the encoder element portion with its markings for detection, and the coupling element portion with its engagement features for torque transmission. This segmentation allows each zone to be optimized for its specific function while being manufactured as a unified piece, managing precision requirements through functional zonation
Solution Approach 2:
Different regions of the integrated component have different quality requirements tailored to their specific functions. The encoder element region requires high precision for rotational position detection, while the coupling element region requires precision for mechanical engagement. This local quality approach allows precision to be concentrated where most needed rather than uniformly applied throughout the entire component
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 integrated approach reduces the installation space required for drive arrangements, allowing for more compact and efficient motorized adjustment systems in vehicles, while maintaining precise detection and transmission of rotational movements.
Implementation Method 1
a marking which can be detected by magnetic field sensor is, for example, a magnetic pole of a permanent magnet or ring magnet
Implementation Method 2
a marking which can be detected by a capacitive or inductive sensor is, for example, ferromagnetic metal piece
Implementation Method 3
a marking which can be detected by a capacitive or inductive sensor is, for example, ferromagnetic metal piece
Data Source
AI summary
A drive arrangement configured to provide motorized adjustment of an adjusting element of a motor vehicle and including a motor, a driveshaft extending from the motor, an output shaft, a spindle configured to translate to adjust the adjusting element, a coupling configured to selectively couple and decouple the spindle from the motor, the coupling, a housing, and a sensor. The coupling including a coupling element configured to generate a signal indicative of rotation angle of the coupling element. The coupling, the output shaft and at least a portion of the driveshaft disposed in the housing. The sensor disposed in the housing and configured to detect the signal.