Vehicle Flap Drive Coupling With Integrated Axial Brake Packaging
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Solution Overview
Problem
Existing drive devices for adjustable vehicle flaps require a significant residual installation length due to the inclusion of braking and coupling devices, limiting their flexibility in various installation spaces.
Innovation Solution
The braking device is integrated axially within the coupling section of the coupling device, allowing for a compact design that maintains braking functionality without increasing the residual installation length, utilizing a radial braking mechanism with disk springs for precise force adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a braking device and coupling device are included in the drive device, then braking functionality and torque limitation are ensured, but the residual installation length increases
Solution Approach 1:
The braking device is merged with the coupling device by integrating the braking mechanism into the coupling section. The first brake element is coupled to the first coupling part, while the second brake element is arranged in the coupling housing, allowing both braking and coupling functions to coexist in the same spatial envelope without increasing the residual installation length.
Solution Approach 2:
The braking device components are nested within the coupling device structure. The first brake element is positioned within the coupling section, and the second brake element is arranged within the coupling housing, effectively nesting the braking functionality inside the existing coupling device boundaries.
2Measurement precision
If a braking device is added to ensure accurate adjustment, then positioning precision is improved, but the device complexity increases
Solution Approach 1:
The braking device is combined with the coupling device in a integrated design. The first brake element connects to the first coupling part, and the second brake element is positioned in the coupling housing, merging two functional systems into one unified structure that achieves positioning precision without proportionally increasing complexity.
3Measurement precision
If the braking device is designed with disk springs for force adjustment, then braking precision is improved, but the manufacturing complexity increases
Solution Approach 1:
Disk springs are used to provide adjustable braking force by changing the force parameter. The disk springs allow precise control of the braking action through their elastic properties, enabling force adjustment while maintaining a relatively simple mechanical structure that is manageable in terms of manufacturing.
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 design reduces the residual installation length, enabling the drive device to be used in diverse installation scenarios while ensuring effective braking and torque transmission without additional space requirements.
Implementation Method 1
a biasing means, in particular designed as a disk spring, is provided which biases the first brake element and the second brake element onto one another
Implementation Method 2
the first brake element comprises a pin-shaped section and is hollow-cylindrical, and the second brake element is designed as a brake disk
Data Source
AI summary
A drive device, in particular for an adjustable vehicle flap, comprising includes a housing extending axially along a drive axle, a motor for generating a driving force in the direction of the drive axle, a first drive element, and a coupling device arranged between the motor and the first drive element. The coupling device comprises a coupling housing and at least one first coupling part with a coupling section for coupling to the first drive element. The first drive element is coupled to the coupling device via the coupling section of the first coupling part, and a braking device for braking a drive movement of the first drive element. A drive device, in particular for an adjustable vehicle flap, which has a lower residual installation length and can thus be used more flexibly in various installation space situations is created by the braking device being arranged axially in the coupling section of the first coupling part.