Brake Throttle Oil Path Structure for Easier Movement Under Pressure
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Solution Overview
Problem
The throttle member in brake devices has difficulty moving due to a constant diameter in the moving section, leading to potentially high pressure on the upstream side.
Innovation Solution
Incorporating a housing with a first oil path and a second oil path of larger cross-section orthogonal to the axial direction, connected through a throttle member that anchors into the first oil path, allowing the third and fourth oil paths to connect via a gap between the housing and throttle member surfaces when the throttle member moves, facilitating easier movement and reducing upstream pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the throttle member is press-fitted into the first oil path with a constant diameter, then the throttle member can be securely anchored to the housing, but the throttle member becomes difficult to move when clogged with foreign substances
Solution Approach 1:
The patent applies the dynamics principle by making the outer diameter of the throttle member variable along its axial length. The throttle member has a larger outer diameter in the press-fitting section (first oil path) for secure anchoring, and a smaller outer diameter in the moving section (second oil path) for easier movement. This dynamic variation in dimensions resolves the contradiction between secure anchoring and ease of movement.
Solution Approach 2:
The patent applies the local quality principle by giving different sections of the throttle member different diameters tailored to their specific functions. The press-fitting section has a larger diameter for reliable anchoring to the housing, while the moving section has a smaller diameter to reduce friction and enable easy movement. Each local section is optimized for its specific requirement.
2Stress or pressure
If the throttle member is difficult to move due to constant diameter, then the anchoring is secure, but the upstream pressure becomes excessively high
Solution Approach 1:
The variable outer diameter of the throttle member along its axial direction enables it to move more easily in the second oil path, preventing excessive buildup of upstream pressure. The smaller diameter in the moving section reduces resistance to movement, allowing the throttle member to respond to pressure changes and maintain pressure balance.
3Ease of operation
If the cross-section of the moving section is increased, then the throttle member moves more easily, but the device complexity increases due to multiple oil paths
Solution Approach 1:
The patent applies segmentation by dividing the housing into multiple oil paths (first oil path and second oil path) with different functions. The first oil path is dedicated to press-fitting and anchoring, while the second oil path facilitates easy movement. This segmentation allows each path to be optimized for its specific function, resolving the complexity issue through functional separation.
Solution Approach 2:
The housing structure provides different local qualities through the first and second oil paths. The first oil path has a configuration suitable for secure press-fitting, while the second oil path has a larger cross-section suitable for easy movement. This local differentiation enables the throttle member to achieve both secure anchoring and easy movability.
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 the throttle member to move more easily and suppresses upstream pressure from becoming excessively high, ensuring efficient operation of the brake device.
Implementation Method 1
a throttle member that is anchored to the housing by being press-fitted into the first oil path
Implementation Method 2
the third oil path and the fourth oil path are connected through a gap between an inner circumferential surface forming the second oil path of the housing and an outer circumferential surface of the throttle member
Data Source
AI summary
A housing of brake device includes a first oil path, a second oil path that is adjacent to the first oil path in a first direction along an axial direction of the first oil path and has a larger cross-section orthogonal to the axial direction than the first oil path, a third oil path connected to the first oil path, and a fourth oil path connected to the second oil path. A throttle member of the brake device is anchored to the housing by being press-fitted into the first oil path. The third oil path connects the fourth oil path through the throttle. When the throttle member moves in the first direction by releasing the press-fitting, the third oil path connects the fourth oil path through a gap between an inner circumferential surface forming the second oil path and an outer circumferential surface of the throttle member.