Parking Brake Load Transmission Unit for Uniform Piston Loading
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Solution Overview
Problem
In vehicle parking brake systems, uneven load transmission to multiple pistons can lead to friction pad wear and degraded braking performance, as existing systems do not ensure uniform loading across all pistons.
Innovation Solution
A parking brake apparatus featuring a load transmission unit that connects a pair of pressing units, allowing power from one unit to be transmitted to the other, ensuring uniform loading on brake pads through a system of sun gears, planetary gears, carrier sections, and ring gear sections, which are integrated and meshed to distribute rotational force effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single actuator drives multiple pistons, then the structure is simplified and cost is reduced, but load transmission becomes non-uniform causing friction pad wear and degraded braking performance
Solution Approach 1:
A load transmission unit is introduced as an intermediary mechanism between the single actuator and multiple pistons. This unit includes load transmission members that connect the pistons and enable bidirectional load transmission, ensuring that the actuating force from the single actuator is uniformly distributed to all pistons, thereby preventing uneven friction pad wear while maintaining structural simplicity
Solution Approach 2:
The load transmission unit is segmented into multiple load transmission members, each connecting adjacent pistons. This segmentation allows independent load balancing for each piston while maintaining overall system coordination, ensuring uniform load distribution across all friction pads without requiring separate actuators for each piston
2Reliability
If multiple pistons are used to press brake pads, then braking performance is improved, but non-uniform load transmission causes uneven wear of friction pads
Solution Approach 1:
The load transmission unit creates a feedback mechanism where each piston's load status influences the others through the load transmission members. When one piston experiences higher load, the load transmission members automatically transfer portion of that load to adjacent pistons, creating a self-balancing system that ensures uniform friction pad wear and extends service life while maintaining braking performance
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 ensures that brake pads are pressed with uniform loads, preventing uneven wear and enhancing braking performance by evenly distributing the applied force across all pistons, thus maintaining consistent braking efficiency.
Implementation Method 1
a power transmission section rotated by driving the motor section, and including transmission worm gears
Implementation Method 2
a planetary gear section rotated by being meshed with the sun gear section
Implementation Method 3
a piston section connected to the carrier section, and pressing the brake pad by being moved toward the brake pad through receiving rotational power from the planetary gear section
Implementation Method 4
a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit
Data Source
AI summary
A parking brake apparatus for a vehicle including 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; and a load transmission unit installed between the pair of pressing units, connected to each of the pair of pressing units, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit.