Parking Brake Load Transmission With Hall Sensor Feedback
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Solution Overview
Problem
Existing parking brake systems for vehicles often experience uneven load transmission to brake pads, leading to friction pad wear and degraded braking performance, especially when multiple pistons are driven by a single actuator.
Innovation Solution
A parking brake apparatus featuring a load transmission unit with ring gear sections made of magnetic material, connected to pressing units, and a hall sensor unit to sense magnetic field changes, ensuring uniform load distribution and real-time monitoring of load transmission operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single actuator drives multiple pistons, then the device complexity is reduced, but the load transmission uniformity deteriorates
Solution Approach 1:
A load transmission unit is introduced as an intermediary mechanism between the single actuator and multiple pistons. This unit includes a first pressing unit connected to the actuator, a second pressing unit, and a load transmission mechanism that transfers load between them. The load transmission unit ensures uniform load distribution to multiple brake pads while maintaining the simplicity of a single actuator configuration.
2Reliability
If load transmission unit rotation is monitored, then the reliability is improved, but the device complexity increases
Solution Approach 1:
A hall sensor is integrated into the load transmission unit to detect rotational position and provide feedback signals. The sensor includes a magnetic body attached to the load transmission unit and a hall element that generates detection signals based on magnetic field changes during rotation. This feedback mechanism enables real-time monitoring of the load transmission unit's operation, improving reliability through abnormal condition detection while maintaining relatively simple implementation.
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 apparatus ensures uniform load transmission to brake pads, preventing uneven wear and allowing for immediate countermeasures in case of abnormal operations, thereby enhancing braking performance and reliability.
Implementation Method 1
a hall sensor unit disposed between the load transmission unit and the magnet unit, and sensing a change in magnetic field according to rotation of the load transmission unit
Data Source
AI summary
A parking brake apparatus for a vehicle includes a motor section receiving electric power from an outside, and generating power; a power transmission section rotated by driving the motor section, and including transmission worm gears; a pair of pressing units receiving power from the power transmission section and pressing a brake pad; a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, transmitting a pressing load of any one of the pair of pressing units to the other pressing unit, and made of a magnetic material; a magnet unit disposed to be spaced apart from the load transmission unit; and a hall sensor unit disposed between the load transmission unit and the magnet unit, and sensing a change in magnetic field according to rotation of the load transmission unit.