Split Piston Electromechanical Brake for Even Friction Plate Pressure
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Solution Overview
Problem
Existing electro-mechanical brake systems face challenges in achieving even distribution and braking efficiency due to uneven pressure application on the friction plate, leading to potential structural weaknesses and reduced braking effectiveness.
Innovation Solution
A split-type electro-mechanical brake apparatus utilizing a split piston with two protrusions to evenly distribute pressure on the friction plate, enhancing braking efficiency and structural stability by optimizing the arrangement and dimensions of the split protrusions and transmission grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single piston is used to apply braking force, then the structure is simple, but the pressure distribution on the friction plate is uneven
Solution Approach 1:
The single piston is segmented into two split protrusions that are arranged symmetrically on the piston body. These split protrusions independently contact different regions of the friction plate, dividing the single pressure application point into multiple contact points. This segmentation enables more uniform pressure distribution across the friction plate surface while maintaining the simplicity of a single piston structure.
2Stress or pressure
If double-cylinder or multi-cylinder braking is used to achieve even pressure distribution, then the pressure application is improved, but the overall volume of the brake apparatus increases
Solution Approach 1:
The functions of multiple cylinders are merged into a single piston structure. The split protrusions on the single piston perform the same pressure distribution function as multiple separate cylinders would, but in a compact integrated form. This merging achieves even pressure distribution without requiring multiple separate cylinder assemblies, thereby controlling the overall volume of the brake apparatus.
Solution Approach 2:
The split protrusions are nested within the body of a single piston, with one split protrusion positioned on each side of the piston's central axis. This nested arrangement allows the pressure distribution function of multiple elements to be achieved within the volume of a single piston component, reducing the overall space required compared to separate multi-cylinder arrangements.
3Volume of moving object
If the transmission groove is made thin to reduce space, then the space is saved, but the structure strength of the split piston is compromised
Solution Approach 1:
The transmission groove is designed with non-uniform thickness distribution. The groove is thinner at certain locations to save space and heavier at critical locations to maintain structural strength. This local variation in quality optimizes the balance between space utilization and structural integrity, allowing the split piston to maintain sufficient strength while minimizing the volume occupied by the transmission groove.
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 solution ensures even force application on the friction plate, improving braking efficiency and structural integrity, thereby enhancing the overall performance and service life of the brake system.
Implementation Method 1
one end of the ball screw is configured to be in transmission connection to the brake motor through the reducer, the other end of the ball screw is configured to drive the split piston
Implementation Method 2
the split piston is configured to split a received driving force through two split protrusions, to push a same friction plate jointly through the two split protrusions to brake a wheel
Implementation Method 3
push a same friction plate jointly through the two split protrusions to brake a wheel
Data Source
AI summary
A split-type electro-mechanical brake apparatus and a vehicle. The electro-mechanical brake apparatus includes a brake motor, a reducer, a ball screw, and a split piston. One end of the ball screw is configured to be in transmission connection to the brake motor through the reducer, while the other end is configured to drive the split piston, and the split piston is configured to push a same friction plate jointly through the two split protrusions to brake a wheel. The split piston includes two end faces that face away from each other, the transmission groove of the one end face is configured to be in transmission connection to the other end of the ball screw. The two split protrusions are arranged at a spacing on the other end face. In embodiments, pressure applied to the friction plate is more even.