Vehicle Parking Brake Load Transmission Uniformity
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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 with a load transmission unit that connects pair of pressing units, allowing uniform load distribution across brake pads, and a power transmission section using a worm gear mechanism to ensure simultaneous power delivery to both pressing units, thereby maintaining consistent braking force.
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 component between the single actuator and multiple pistons. This unit includes load transmission members that mechanically couple the pistons, enabling uniform load distribution from the single actuator to multiple pressing units, thereby resolving the contradiction between simplified actuator configuration and uniform load transmission
2Ease of operation
If the motor section is mounted to the upper surface of the caliper housing, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The caliper housing is segmented into distinct functional regions, including an upper surface specifically designed for motor mounting. This segmentation allows the motor section to be independently mounted and accessed from the upper surface, improving ease of operation while organizing the internal complexity into manageable sections
3Force
If a pressure connection sleeve moves the piston toward the caliper housing, then the braking force is increased, but the load transmission uniformity deteriorates
Solution Approach 1:
The load transmission unit acts as a mediator between the pressure connection sleeve and multiple pistons. It includes load transmission members that distribute the force from the single pressure connection sleeve uniformly to multiple pressing units, ensuring that high braking force is achieved while maintaining uniform load distribution across all brake pads
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 enhancing braking performance by ensuring both pressing units apply equal force, thus maintaining consistent braking efficiency.
Implementation Method 1
a motor section receiving electric power, and generating power
Implementation Method 2
a power transmission section rotated by driving the motor section
Implementation Method 3
two friction pads mounted to the piston and the caliper housing are pressed against both surfaces of a disc to restrain the rotation of the disc
Data Source
AI summary
A parking brake apparatus for a vehicle including a motor section receiving electric power, and generating power; a power transmission section rotated by driving the motor section; 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, and transmitting a pressing load of any one of the pair of pressing units to the other pressing unit; and a caliper housing having installed therein the pressing units, wherein the motor section is mounted to an upper surface of the caliper housing.