Integrated EPB Brake Pad Assembly for Low Drag Torque
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Solution Overview
Problem
Conventional Electronic Parking Brake (EPB) systems require multiple parts, increasing manufacturing complexity and cost, and generate drag torque and noise due to imperfect spacing of brake components during release.
Innovation Solution
A brake apparatus where the nut, piston, and first brake pad are formed as one body, with a screw bar driving the nut and piston to pressurize and release the brake disk, reducing part count and drag torque by ensuring complete separation of brake components during release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the conventional EPB uses separate nut, piston and brake pad components, then the braking function can be achieved, but the number of parts increases leading to higher manufacturing cost and complexity
Solution Approach 1:
The patent merges the nut, piston, and brake pad into a single integrated component. The brake pad includes a pad body with an integrated nut portion that directly engages the screw bar, eliminating the need for separate nut and piston components. This integration reduces part count and manufacturing complexity while maintaining the braking function.
2Object-generated harmful factors
If the brake pad and brake disk are not perfectly spaced apart during release, then the mechanical connection is maintained, but drag torque and moan noise are generated
Solution Approach 1:
The patent employs a spring component that provides dynamic elastic force to the brake pad, enabling the pad to flex and achieve complete separation from the brake disk during release. This dynamic mechanism ensures reliable spacing without generating drag torque or moan noise, while maintaining mechanical connection during braking.
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 reduces part costs, manufacturing steps, and drag torque by integrating the nut, piston, and brake pad, ensuring complete separation during braking force release, thereby minimizing noise and operational inefficiencies.
Implementation Method 1
a screw bar positioned in a caliper body, and rotated by power received from a motor module; a nut configured to the outside of the screw bar, engaged and coupled with the screw bar, and moved toward a brake disk by the rotation of the screw bar
Implementation Method 2
a first friction member coupled to the first back plate, and configured to pressurize the brake disk
Data Source
AI summary
A brake apparatus for a vehicle may include: a screw bar positioned in a caliper body, and rotated by power received from a motor module; a nut configured to the outside of the screw bar, engaged and coupled with the screw bar, and moved toward a brake disk by the rotation of the screw bar; a piston connected to the nut, and moved with the nut; and a first brake pad connected to the piston, and moved with the piston so as to pressurize the brake disk.