Drum Brake Reduction Motor With Angle Gear for Compact Packaging
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Solution Overview
Problem
Existing geared motor architectures for drum brake actuation are bulky and inflexible, making them difficult to adapt to different wheel configurations and requiring fixed orientations, which limits their applicability and efficiency.
Innovation Solution
The implementation of a geared motor with an angle gear system utilizing a flat wheel gear transmission, allowing for greater freedom in configuration and orientation, and incorporating a reduction gear with stepped gears for efficient torque conversion, reduces the motor's footprint and enhances adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a traditional geared motor architecture with parallel axes is used, then the motor can effectively reduce speed and increase torque, but the motor becomes bulky and inflexible in configuration
Solution Approach 1:
The patent introduces an angle transmission mechanism that changes the spatial relationship between motor axis and reducer axis from parallel to intersecting (typically perpendicular). This dimensional change in axis orientation allows for more compact packaging of the geared motor assembly while maintaining the speed reduction and torque multiplication functions, directly resolving the contradiction between power output and motor size
2Stability of the object's composition
If the motor axis is arranged parallel to the epicyclic gear train axes, then the geared motor can maintain a fixed architecture, but it cannot adapt to different wheel configurations and space available at the wheel level
Solution Approach 1:
By changing the axis arrangement from parallel to intersecting through the angle transmission, the patent enables the geared motor to adapt to different spatial configurations at the wheel level. The intersecting axes architecture provides freedom in orienting the motor relative to the drum brake plate, allowing adaptation to various wheel configurations and available spaces while maintaining structural stability
3Speed
If a reduction module with multiple stages of epicyclic gear trains is used, then effective speed reduction is achieved, but the geared motor becomes bulky and complex
Solution Approach 1:
The patent employs an angle transmission mechanism with intersecting axes that achieves speed reduction through a different geometric configuration. This approach can simplify the overall gear train architecture by utilizing the angular relationship between axes to achieve compact speed reduction, potentially reducing the number of gear stages needed compared to traditional parallel-axis epicyclic configurations
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 provides a more compact and adaptable geared motor with improved efficiency, offering a wide range of orientations and reduced assembly precision constraints, while maintaining high efficiency and flexibility in various configurations.
Implementation Method 1
at least one angle transmission formed by a flat wheel gear
Data Source
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AI summary
A reduction motor for a parking brake mechanical actuator (7) of a drum brake comprising an electric motor (21) and a reduction gearbox (32), in which the electric motor (21) comprises an output shaft (24) extending along a first axis, the reduction gearbox (32) comprises an output shaft extending along a second axis, and in which the reduction motor also comprises at least one angle gear (44) between the electric motor (21) and the reduction gearbox (32) or at the output of the reduction gearbox (32), said angle gear (44) comprising a flat-wheel gear-pair comprising a pinion (25) and a flat gearwheel (34a), the pinion (25) being engaged with the output shaft (24) of the electric motor (21) and meshing with the flat gearwheel (34a) which is a part of the reduction gearbox (32).