Electronic Brake Actuator Lock Preventing Unit
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Solution Overview
Problem
Conventional electronic brake systems face challenges in generating effective braking pressure and maintaining stability, particularly in ensuring the actuator operates efficiently and prevents malfunctions such as excessive nut retreat and rotation issues.
Innovation Solution
The electronic brake system incorporates a motor with a stator and rotor, a power conversion unit that includes a spindle and nut for linear motion, a piston for fluid pressure generation, and a gap regulating unit allowing movement in multiple directions, along with a lock preventing unit to prevent excessive nut retreat and rotation, enhancing operational stability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electronic brake system uses a motor with power conversion unit, then braking pressure can be generated, but the actuator may experience excessive nut retreat and rotation issues leading to malfunction
Solution Approach 1:
The patent applies preliminary anti-action by providing a lock preventing unit that proactively prevents excessive nut retreat and rotation before they can cause malfunction. The lock preventing unit includes a lock protrusion and lock groove that engage to restrict the nut's movement, counteracting the tendency toward excessive retreat and rotation before they become harmful.
Solution Approach 2:
The gap regulating unit serves as an intermediary between the motor and the power conversion unit, allowing controlled relative movement while maintaining proper engagement. This intermediary mechanism absorbs dimensional variations and prevents excessive stress transmission that could lead to nut retreat and rotation issues.
2Reliability
If the actuator components are tightly assembled to prevent malfunctions, then reliability improves, but assembly difficulty and manufacturing complexity increase
Solution Approach 1:
The patent applies dynamics by allowing the power conversion unit to move relatively with respect to the motor through the gap regulating unit. This dynamic design accommodates dimensional variations and assembly tolerances, making manufacturing easier while maintaining reliable operation through the lock preventing unit that ensures proper engagement during operation.
Solution Approach 2:
The gap regulating unit serves multiple functions: it allows controlled movement to accommodate dimensional variations, maintains proper engagement between components, and simplifies assembly by reducing the need for precise pre-positioning. This multi-functionality achieves both reliability and ease of manufacture.
3Stability of the object's composition
If the power conversion unit is fixed rigidly to the motor, then structural stability is achieved, but the actuator cannot automatically maintain center and may experience binding
Solution Approach 1:
The patent replaces rigid fixation with a dynamic connection through the gap regulating unit, which allows the power conversion unit to move relatively to the motor. This dynamic structure enables automatic center maintenance through controlled movement while preventing binding, achieving stability without excessive structural complexity.
4Manufacturing precision
If dimensional variations of motor and power conversion unit are minimized, then precision improves, but manufacturing cost and complexity increase
Solution Approach 1:
The gap regulating unit provides a dynamic solution that accommodates dimensional variations through controlled relative movement. Instead of requiring tight tolerances, the design allows components to self-adjust within the gap, reducing manufacturing precision requirements while maintaining operational reliability through the lock preventing unit.
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 configuration enables quick hydraulic pressure generation, precise pressure control, and improved durability by maintaining the actuator's center, reducing noise and assembly difficulties, while preventing malfunctions and enhancing the detection capability of the motor position sensor.
Implementation Method 1
a motor having a stator and a rotor for generating a rotational force by an electrical signal
Implementation Method 2
a power conversion unit disposed in the accommodating space, and including a spindle rotated by a rotational force of the rotor and a nut coupled to the spindle to be linearly moved by rotation of the spindle
Implementation Method 3
a piston coupled to move with the nut; and a sleeve coupled to one end of the rotor... having an inner space communicating with the accommodating space and accommodating the piston so as to be able to move forward and backward
Data Source
AI summary
Disclosed is an actuator of an electronic brake system including: a motor having a stator and a rotor for generating a rotational force by an electrical signal, the rotor having an accommodating space therein; a power conversion unit disposed in the accommodating space, and including a spindle rotated by a rotational force of the rotor and a nut coupled to the spindle to be linearly moved by rotation of the spindle; a piston coupled to move with the nut; and a sleeve coupled to one end of the rotor by a bearing so that the rotor is relatively rotatable and having an inner space communicating with the accommodating space and accommodating the piston so as to be able to move forward and backward.