Electro-Mechanical Brake Notch Structure for Stable Linear Motion
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Solution Overview
Problem
Existing electro-mechanical brake devices suffer from damage or loosening of the notch when converting rotational force into rectilinear motion, leading to potential system failure and braking issues.
Innovation Solution
The electro-mechanical brake device incorporates a notch part with a steel notch body and resin-made notch cover and protrusion parts, which are insert injection molded, to prevent damage and disassembly during piston motion, ensuring stability and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional notch structure is used to convert rotational force into rectilinear motion, then the braking function can be achieved, but the notch may be damaged or loosened during piston motion
Solution Approach 1:
The notch is divided into three separate components: a notch body part (steel), a notch cover part (resin), and a notch protrusion part (resin). This segmentation allows each part to perform its specific function while being protected from damage, resolving the contradiction between achieving the braking function and preventing notch damage or loosening during operation
Solution Approach 2:
The notch structure combines steel material for the notch body part with resin material for the notch cover part and notch protrusion part. This composite material approach provides both the structural strength needed for durability and the functional properties required for reliable operation, directly addressing the contradiction between notch durability and structural integrity
2Reliability
If a robust notch structure is used to prevent damage, then reliability improves, but manufacturing cost increases
Solution Approach 1:
The invention changes the material parameters of the notch components by using resin for the cover and protrusion parts instead of traditional metal throughout. This parameter change reduces manufacturing cost while maintaining reliability through the segmented design that protects critical functions
Solution Approach 2:
By segmenting the notch into multiple parts with different materials, the invention achieves reliable braking performance without requiring expensive robust metal construction throughout, thereby reducing manufacturing cost while maintaining braking stability
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 prevents notch damage and disassembly, ensuring stable braking performance while lowering manufacturing costs through the use of a cost-effective resin material for the notch components.
Implementation Method 1
The electro-mechanical brake device converts a rotational force between a motor and a ball screw into a forward motion of the ball screw to generate hydraulic pressure
Implementation Method 2
when forming the hydraulic pressure through the forward and backward motion of the piston
Data Source
AI summary
An electro-mechanical brake device for a vehicle according to the present disclosure includes a housing, a spindle part installed inside the housing and rotated by a motor, a nut part rotatably engaged to the spindle part, a guide part formed concavely along a longitudinal direction of the housing on an inner surface of the housing, a notch part installed on an outer surface of the nut part, in contact with the guide part, and configured to guide the nut part to move rectilinearly along the guide part when the spindle part rotates, and a piston part engaged to the nut part and configured to be pressurized by the nut part to generate a braking force for wheels.