Brake Pressure Control Housing Seal Structure for Compact Motorcycles
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Solution Overview
Problem
Conventional brake fluid pressure control devices face challenges in maintaining airtightness between the main body portion and the lid of the housing, leading to sealing material leakage, while also being bulky in size due to additional wall structures to prevent leakage.
Innovation Solution
The device incorporates a groove portion in the main body portion with an outer peripheral wall longer than the inner peripheral wall, creating a space to store sealing material, thus preventing leakage without increasing the device's size by incorporating additional wall structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wall portion is added to the lid to prevent sealing material leakage, then sealing reliability is improved, but device size increases
Solution Approach 1:
The invention transitions from preventing leakage in the radial direction (by adding a wall portion) to preventing leakage in the axial direction. By making the outer peripheral wall longer than the inner peripheral wall in the thickness direction, the sealing material is contained within the groove portion through axial containment rather than radial containment, thus avoiding the need for an additional wall portion that would increase device size.
Solution Approach 2:
The invention applies different lengths to the outer peripheral wall and inner peripheral wall of the groove portion, creating local asymmetry in the sealing structure. This local quality difference allows the outer peripheral wall to extend further in the thickness direction, providing enhanced sealing material containment without requiring a complete surrounding wall structure, thereby preventing leakage while minimizing size increase.
2Reliability
If the outer peripheral wall of the groove portion is made longer than the inner peripheral wall, then sealing material leakage is prevented, but manufacturing complexity increases
Solution Approach 1:
The groove portion is segmented into distinct wall sections with different functions: the inner peripheral wall provides basic groove structure, while the extended outer peripheral wall specifically addresses sealing material containment. This segmentation allows each wall section to be optimized for its specific function, making the manufacturing process more straightforward by clearly defining the role of each geometric feature.
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 effectively prevents sealing material leakage while maintaining a compact size, enhancing aesthetic appeal and suitability for saddle-type vehicles with limited component layout flexibility.
Implementation Method 1
a gap between the groove portion and the insertion wall is sealed by a sealing material
Implementation Method 2
a coil which is erected on the base body and drives a hydraulic pressure adjusting valve opening and closing the flow path
Data Source
AI summary
To obtain a brake fluid pressure control device for a saddle-type vehicle capable of improving airtightness between a main body portion and a lid of a housing, suppressing a sealing material from leaking to the outside of the brake fluid pressure control device, and having a smaller size than the conventional one.A brake fluid pressure control device according to the invention includes a housing which covers a coil driving a hydraulic pressure adjusting valve for opening and closing a flow path for a brake fluid and a circuit board controlling energization of the coil, the housing includes a main body portion which is provided with an opening portion and a lid which covers the opening portion and is attached to the main body portion, the main body portion includes a groove portion which is formed on the outer peripheral side of the opening portion, the lid includes an insertion wall which is inserted into the groove portion, a space for storing a sealing material is formed between the insertion wall and an outer peripheral wall of the groove portion and between the insertion wall and an inner peripheral wall of the groove portion, and a length of the outer peripheral wall extending toward the lid is longer than a length of the inner peripheral wall extending toward the lid.