Electronic Mechanical Brake Caliper for Self-Locking Parking Force
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Solution Overview
Problem
Conventional electronic mechanical brakes (EMBs) face issues with complex structures, high manufacturing costs, and performance degradation due to the use of elastic and friction members, leading to increased current consumption and abnormal brake noise.
Innovation Solution
The EMB design is simplified by removing elastic and friction members, with a caliper body that includes a thrust bearing support portion and a bending portion to transmit friction force, and a spindle that self-locks without a solenoid or motor, using a thrust bearing and flange portion to generate parking braking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic members and friction members are used to support clamping force and enable parking brake function, then the brake can maintain parking force, but the structure becomes complicated and manufacturing costs increase
Solution Approach 1:
The patent removes elastic members and friction members from the conventional EMB structure, extracting only the essential components (spindle, piston, caliper body) needed to achieve both normal braking and parking brake functions. This simplification eliminates the complexity and cost issues while maintaining the parking brake capability through the self-locking mechanism of the spindle.
Solution Approach 2:
The spindle is designed to serve multiple functions: it acts as both the actuating mechanism for normal braking and the self-locking mechanism for parking brake. The caliper body is also designed to provide both braking surface and structural support, eliminating the need for separate elastic and friction members. This multi-functionality reduces component count and simplifies the overall structure.
2Reliability
If elastic members and friction members are used to enable parking brake, then parking force can be maintained, but manufacturing costs increase
Solution Approach 1:
The patent extracts and removes the costly elastic members and friction members from the design, replacing them with a simplified spindle-based self-locking mechanism. This reduction in component count directly lowers manufacturing costs while maintaining the essential parking brake function through the inherent mechanical self-locking property of the spindle design.
Solution Approach 2:
The patent employs a simple, inexpensive spindle structure that achieves the parking brake function without requiring expensive elastic members or friction members. The design accepts that the spindle may wear over time (short-living characteristic) but compensates by using low-cost materials and simple geometry, thereby reducing overall manufacturing cost while maintaining functional reliability.
3Reliability
If conventional EMB with solenoid or small motor locking device is used, then parking brake function is achieved, but costs are high and size is large
Solution Approach 1:
The patent replaces the solenoid or small motor locking device (electromechanical system) with a purely mechanical self-locking spindle design. This substitution eliminates the need for additional electromagnetic components, reducing both structural complexity and size while maintaining the parking brake function through mechanical self-locking alone.
Solution Approach 2:
The patent extracts and removes the solenoid or small motor locking device from the conventional EMB design, retaining only the essential mechanical components (spindle, piston, caliper body). This extraction simplifies the structure by eliminating unnecessary electromagnetic components while preserving the parking brake capability through the spindle's self-locking mechanism.
4Stability of the object's composition
If spindle is supported using elastic member, then structure is provided, but braking performance degrades and brake instability occurs
Solution Approach 1:
The patent removes the elastic member from the spindle support structure, eliminating the source of performance degradation and instability. The spindle is instead supported directly by the caliper body through rigid contact surfaces, ensuring stable and reliable brake performance while maintaining structural integrity through proper mechanical design of the support geometry.
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 simplifies the structure, reduces manufacturing costs, and improves brake performance by eliminating elastic and friction members, while maintaining a self-locking state to conserve energy during parking braking.
Implementation Method 1
a thrust bearing and a flange portion, is coupled to the piston to rotate according to the rotational force
Implementation Method 2
friction pads press a disc which rotates with a wheel from both sides thereof to generate a braking force
Data Source
AI summary
The present disclosure is mainly directed to simplifying a design structure of an electronic mechanical brake and reducing manufacturing costs by removing an elastic member and a friction member.In addition, the present disclosure is also mainly directed to improving the performance of a brake by changing a shape of a caliper body so that the caliper body replaces a clamping force support structure, of which a function is performed by an elastic member and a friction member, and solving a brake instability problem.