Magnetic Braking Unit for Vehicle Tailgate Drive
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Solution Overview
Problem
Conventional braking devices for vehicle parts are expensive, require significant installation space, and are prone to wear and temperature sensitivity, especially those using friction for braking.
Innovation Solution
A driving device with two braking systems: a permanent magnet brake for standstill and a generator brake for movement, utilizing magnetic forces to provide a reliable and space-saving braking solution, with the generator brake switching into a power feedback mode to create braking force during vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional friction-based braking devices are used, then reliable braking force is provided, but installation space requirement increases and wear occurs
Solution Approach 1:
The patent replaces conventional friction-based mechanical braking systems with a magnetic braking system that uses electromagnetic fields to generate braking force. The magnetic brake unit includes permanent magnets and magnetic brake elements that interact through magnetic fields, eliminating the need for friction-based mechanical contact. This substitution reduces installation space requirements while maintaining reliable braking force and eliminating wear.
Solution Approach 2:
The patent changes the fundamental parameter of braking mechanism from friction-based mechanical force to magnetic field-based force. By utilizing magnetic attraction and repulsion forces between permanent magnets and magnetic brake elements, the system achieves reliable braking without the physical contact and wear inherent in friction-based systems, while requiring less installation space.
2Force
If conventional friction-based braking devices are used, then braking force is provided, but wear and temperature sensitivity increase
Solution Approach 1:
The patent replaces friction-based mechanical braking with a magnetic braking system that uses electromagnetic fields. The magnetic brake unit generates braking force through magnetic attraction and repulsion between permanent magnets and magnetic brake elements, eliminating physical contact. This substitution eliminates wear and reduces temperature sensitivity since there is no friction-generated heat and no direct mechanical contact between braking surfaces.
3Reliability
If a comprehensive braking system for both standstill and movement is implemented, then all movement states are controlled, but device complexity increases
Solution Approach 1:
The patent merges the braking functions for standstill and movement into a single integrated magnetic brake unit. The magnetic brake elements are configured to provide braking force in both stationary and moving states through the same magnetic field interaction mechanism, eliminating the need for separate braking systems for different operational states. This integration reduces device complexity while maintaining comprehensive braking control.
Solution Approach 2:
The magnetic brake unit is designed with universal functionality to provide effective braking across all movement states. The permanent magnets and magnetic brake elements work together to generate magnetic forces that are effective whether the vehicle part is stationary or in motion, making the system multi-functional without requiring additional components or complex control mechanisms.
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 provides a reliable, space-efficient, and wear-free braking system that effectively arrests vehicle parts at standstill and controls movement, reducing the need for additional installation space and minimizing wear, while maintaining smooth operation.
Implementation Method 1
a first braking device that includes a permanent magnet element and thus is designed as a permanent magnet brake in particular serves to provide a braking force at standstill
Implementation Method 2
a second braking device that is configured to switch the electric drive into a generator braking mode in order to at least partly feed a power generatorically produced by the drive back into the drive and thereby provide a braking force
Data Source
AI summary
It is provided a driving device for adjusting a vehicle part, in particular a tailgate, comprises an electric drive for driving the vehicle part, with an output shaft for transmitting an adjusting force to the vehicle part, and a first braking device operatively connected to the output shaft, which includes at least one permanent magnet element and is configured to provide a braking force for arresting the vehicle part in a currently adopted position. There is also provided a second braking device that is configured to switch the electric drive into a generator braking mode in order to at least partly feed a power generatorically produced by the drive back into the drive and thereby provide a braking force for braking a movement of the vehicle part.