Vehicle Wheel Bearing Dam Section for Muddy Water Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing bearing devices for wheels face limitations in effectively damming up muddy water due to the height constraint of the dam section, which is determined by the position of the hub bolt and other structural components, limiting the seal performance.
Innovation Solution
The bearing device incorporates a core metal with a flange section and a dam section of an elastic body that protrudes radially outward, along with an outer member-side eaves section and an inner member-side eaves section, forming an annular space to increase the capacity for receiving and guiding muddy water, while the annular groove directs overflowing water downward, enhancing the damming effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dam section height is increased to improve seal performance, then the ability to dam up muddy water is improved, but the dam section height is limited by the position of hub bolt and other structural components
Solution Approach 1:
The patent extends the damming function from a single radial dam section to a three-dimensional structure by adding the outer member-side eaves section that axially protrudes to surround the outer member. This creates an annular space that provides additional volume for receiving muddy water, effectively increasing the damming capacity without increasing the radial height of the dam section itself.
2Object-affected harmful factors
If the dam section height is increased to improve seal performance, then the effect of damming up muddy water is improved, but the height is constrained by structural components like hub bolt
Solution Approach 1:
The patent divides the damming function into two distinct structural elements: the radial dam section that blocks muddy water flow, and the axial outer member-side eaves section that surrounds the outer member and creates an annular receiving space. This segmentation allows each element to perform its specific function optimally while adapting to the existing structural constraints of the bearing device.
3Volume of stationary object
If the annular space for receiving muddy water is enlarged, then the damming effectiveness is improved, but the space is limited by the position of hub bolt and structural components
Solution Approach 1:
The outer member-side eaves section is designed to nest around the outer member, creating an annular space between the eaves section and the outer member. This nested configuration efficiently utilizes the available space within the bearing device structure, maximizing the volume for receiving muddy water without interfering with the position of hub bolts or other structural components.
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 increases the effectiveness of damming up muddy water, even when the water overflows, by creating a larger receiving space and guiding it downward, thereby improving seal performance without increasing friction torque.
Implementation Method 1
a dam section formed of an elastic body and having an annular shape is provided extending from the core metal, the dam section protruding radially outward relative to an outer peripheral surface of the outer member
Implementation Method 2
an outer member-side eaves section formed of an elastic body and having a cylindrical shape is provided integrally with the dam section, the outer member-side eaves section axially protruding to surround the outer member
Implementation Method 3
on an outer peripheral surface of at least one of the dam section, the outer member-side eaves section, and the inner member-side eaves section, an annular groove is circumferentially formed
Data Source
AI summary
A bearing device for a wheel is disclosed. The bearing device includes: an outer ring; a hub ring having at least one inner ring, and double rows of inner rolling surfaces on an outer periphery of the hub ring; double rows of balls in between respective rolling surfaces of the outer ring and the hub ring; and an outer seal member. The bearing device further includes: core metal having a circular cylinder section and a circular plate section at an opening of the outer ring; and a lip having an elastic body and being positioned on the circular plate section. An annular dam section having an elastic body and protruding further radially outward than an outer peripheral surface of the outer ring extends from the circular plate section, and an outer member-side eaves section has a circular cylindrical shape and protrudes axially so as to surround the outer ring.