Active Stabilizer Worm Gear Actuator Space Optimization
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Solution Overview
Problem
Existing active roll stabilizers for commercial vehicles require significant installation space due to coaxial arrangements of electric motors and planetary gears, limiting their use in vehicles with restricted space, and often necessitate additional safety measures like holding brakes or residual stiffness to ensure operational safety.
Innovation Solution
An active stabilizer design featuring a worm gear and electric motor arrangement where the motor is positioned vertically, allowing the connecting member to rotate relative to the lever without occupying space between them, and incorporating a self-locking worm gear for safety without the need for additional brakes or stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an electric motor with planetary gear is used for active roll stabilizer, then high actuating torque can be achieved, but installation space requirement increases significantly
Solution Approach 1:
The patent replaces the conventional planetary gear mechanism with a worm gear mechanism. This substitution maintains the ability to generate high actuating torque while significantly reducing the installation space requirement, as the worm gear has a more compact structure and does not require coaxial arrangement
Solution Approach 2:
The patent changes the spatial arrangement from a coaxial configuration (planetary gear) to a non-coaxial configuration (worm gear). The actuator is arranged offset from the axis of rotation of the connecting member, utilizing three-dimensional space more efficiently and reducing the footprint in critical areas
2Reliability
If electric motor with planetary gear is used, then operational safety can be ensured, but additional holding brake is required
Solution Approach 1:
The worm gear mechanism inherently provides self-locking capability due to its mechanical properties. The friction and geometry of the worm gear prevent reverse motion, automatically maintaining the stabilizer position without requiring an additional holding brake or energy consumption for positioning
Solution Approach 2:
The patent removes the holding brake component from the system by utilizing the self-locking property of the worm gear. This extraction of the redundant safety component simplifies the overall device structure while maintaining operational safety
3Force
If electric motor with planetary gear is used, then high actuating torque can be achieved, but coaxial arrangement is required
Solution Approach 1:
The patent transitions from a constrained coaxial arrangement to a flexible non-coaxial arrangement. The actuator can be positioned at various locations and orientations relative to the connecting member's axis of rotation, providing greater installation flexibility and adaptability to different vehicle platform constraints
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 configuration minimizes installation space, eliminates the need for redundant safety systems, reduces energy consumption, and ensures safe operation by preventing uncontrolled movement in case of power failure, while maintaining effective roll compensation and horizontal alignment capabilities.
Implementation Method 1
a Worm gear and an actuator which is coupled to the connecting member with the interposition of the worm gear
Implementation Method 2
an actuator which is coupled to the connecting member with the interposition of the worm gear
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to an active stabilizer for a driver's cab (7) of a motor vehicle, the stabilizer comprising a connecting member (2) extending in a transverse direction (y), two levers (3, 4) which are spaced apart in the transverse direction (y) and interconnected by means of the connecting member (2) and which extend away from the connecting member (2) perpendicularly or approximately perpendicularly to the transverse direction (y), and comprising an actuator (23) having a worm gear (22) and a motor (18) that is coupled to the connecting member (2) by the interconnection of the worm gear (22), the actuator being the means by which the connecting member (2) can rotate relative to a first of the levers (3) about an axis of rotation (11) running in the transverse direction (y) . The actuator (23) is disposed on the first lever (3) or in the region of the first lever (3).