Hydraulic Brake Pressure Generator with Integrated Planetary Gear
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Solution Overview
Problem
Existing hydraulic vehicle brake systems face challenges in efficiently generating hydraulic pressure and managing external forces during the pressure generation process, which can lead to inefficiencies and potential mechanical issues.
Innovation Solution
A pressure generator incorporating a piston-cylinder unit connected to an axially displaceable component of a helical gear, driven by a planetary gear, where the rotatable component of the helical gear forms a planet carrier, allowing for internal force management through a tension connector, ensuring no external forces are applied, and utilizing a hollow shaft motor for compact construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressure generation system is used, then hydraulic pressure can be generated, but external forces are applied to the system causing mechanical issues and inefficiencies
Solution Approach 1:
The patent combines the pressure generation function with the force containment structure by integrating the piston-cylinder unit directly with the helical gear mechanism. The tension connector merges the force transmission path with the gear housing, allowing internalization of forces within the same structural assembly, thereby eliminating external force applications and improving system reliability.
2Volume of moving object
If a compact design is pursued, then space is saved, but force management becomes more difficult
Solution Approach 1:
The patent employs a nested arrangement where the helical gear mechanism is positioned inside the tension connector, and the piston-cylinder unit is integrated within the gear housing. This nested doll-style configuration allows multiple components to occupy overlapping spatial volumes, achieving compactness while maintaining proper force management through the integrated tension connector design.
3Ease of manufacture
If a simple structural design is used, then manufacturing is easier, but hydraulic pressure generation efficiency decreases
Solution Approach 1:
The tension connector serves multiple functions simultaneously: it acts as a structural housing for the helical gear, a force transmission element, and a mounting structure for the piston-cylinder unit. This multi-functionality reduces the number of separate components needed, simplifying manufacturing while maintaining efficient hydraulic pressure generation through the integrated design.
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 solution effectively generates hydraulic pressure while maintaining a compact design and internalizing forces, enhancing the efficiency and reliability of the hydraulic vehicle brake system.
Implementation Method 1
a planetary gear, with the rotatable component of the helical gear forming a planet carrier of the planetary gear
Implementation Method 2
the piston or the cylinder is connected to an axially displaceable component of a helical gear, so that a rotary drive of a rotatable component of the helical gear axially displaces the axially displaceable component
Implementation Method 3
By moving the piston relative to the cylinder into the cylinder, hydraulic pressure can be built up and brake fluid can be displaced or pumped
Data Source
Figure 1
AI summary
The invention relates to a pressure generator (1) for a hydraulic power brake system. According to the invention, the pressure generator (1) is designed with a ball screw (8) and a planetary gear train (22), a spindle nut (7) of the ball screw (8) forming a planetary carrier (19) for planetary gears (17) of the planetary gear train (22). A sun gear (20) is mounted so as to be rotationally fixed to a hollow shaft (26) of an electric hollow shaft motor (27) and rotate along with the hollow shaft (26). The electric hollow shaft motor (27) surrounds the ball screw (7) and the planetary gear train (22).