Geared Motor Torsion Element for Active Roll Stabilizer
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Solution Overview
Problem
Active roll stabilizers in motor vehicles exhibit faulty behavior due to relative rotation between stabilizer halves at low torques and high frequencies, leading to adverse effects during straight-ahead travel and one-sided springing movements.
Innovation Solution
A torsion element with lower rotational rigidity than the stabilizer is introduced between the drive and one stabilizer half, allowing small relative rotations without significant movement in the slewing motor, and featuring a progressive rotational rigidity characteristic to effectively transmit forces between stabilizer halves without additional loading, using spring elements and angular contact ball bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid connection is provided between the stabilizer half and the drive of the slewing motor, then the force transmission is efficient, but relative rotation between stabilizer halves at low torques and high frequencies causes faulty behavior
Solution Approach 1:
A torsion element is introduced as an intermediary component between the stabilizer half and the slewing motor drive. This torsion element allows relative rotation between stabilizer halves at low torques and high frequencies while still transmitting force effectively, thereby eliminating the faulty behavior without requiring a completely different connection structure
Solution Approach 2:
The torsion element changes the rotational rigidity parameter of the connection between the stabilizer half and the drive. By providing a controlled amount of rotational compliance, the system can accommodate high-frequency rotations while maintaining effective force transmission, thus resolving the faulty behavior
2Reliability
If a torsion element is introduced between the drive and the stabilizer half, then small relative rotations are permitted without motor movement, but the rotational rigidity is reduced
Solution Approach 1:
The torsion element is specifically positioned between the stabilizer half and the slewing motor drive, providing localized rotational compliance only where needed. This allows the rest of the system to maintain its full rotational rigidity, thus permitting small relative rotations without significantly reducing the overall rotational rigidity of the stabilizer system
3Stability of the object's composition
If the torsion element is made more rigid to reduce rotation, then the loading on the torsion element increases, but the stabilizer halves cannot rotate freely
Solution Approach 1:
The torsion element provides dynamic rotational compliance that adapts to the operating conditions. At low torques and high frequencies, it allows rotation with reduced loading. When larger torques are applied, it maintains sufficient rigidity to transmit force effectively, thus balancing rotational freedom and loading reduction without requiring the element to be consistently rigid or compliant
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 solution significantly reduces faulty behavior of active roll stabilizers by allowing small rotations between stabilizer halves without motor movement, effectively transmitting torques and absorbing tilting moments, improving stability during low amplitude and high-frequency movements.
Implementation Method 1
The torsion element preferably has at least one spring element, in particular a molded piece which can be deformed in a spring-elastic fashion and which, while stressing the two stabilizer halves torsionally, is loaded by way of tension, compression, or torsion.
Implementation Method 2
The connecting part is preferably rotatably mounted on a motor housing of the stewing motor by means of a bearing, which is provided for transmitting tilting moments. In many cases, the motor housing is permanently connected to the one stabilizer half, for example by means of a screw connection or else also by means of a welded connection.
Data Source
AI summary
A slewing motor for an active roll stabilizer, which can be connected by its drive to one stabilizer half, and which can be connected on the stator side to another stabilizer half of a divided stabilizer. A torsion element, whose rotational rigidity is lower than the rotational rigidity of the stabilizer, is effectively arranged between the drive and the one stabilizer half.