Segmented Cage Sleeve Bearing for Roundness and Leakage Control
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Solution Overview
Problem
Existing bush bearings face challenges with compression installation, leading to distortion of elastic materials, deformation of cages, and loss of roundness, which affects damping properties and service life due to excessive compressive forces and inability to calibrate damping directions.
Innovation Solution
A bush bearing with a cage formed from two parts that can change radial distance, allowing for adjustable rigidity and reduced material stress, featuring a sealed joint area to prevent hydraulic fluid leakage and using elastomeric material for mobility and sealing, with optional sealing rings and chamber covers for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bushing bearing is pressed into the outer sleeve with compression, then the damping characteristics are improved and service life is extended, but the cage deforms and loses roundness causing leaks
Solution Approach 1:
The cage is divided into two separate cage parts (first cage part and second cage part) that can be positioned at different radial distances from the bearing body. This segmentation allows the cage structure to accommodate compression forces without deforming the entire cage uniformly, preventing loss of roundness and leakage while maintaining damping characteristics.
Solution Approach 2:
The cage structure is made dynamic by allowing the distance between the first and second cage parts to be variable in the radial direction. This enables the cage to adapt its configuration during installation and operation, absorbing compression forces through controlled movement rather than rigid deformation, thus maintaining structural integrity and preventing leaks.
2Reliability
If excessive compressive stress is applied to the bushing bearing during installation, then the damping characteristics are enhanced, but the elastic material is subjected to tensile forces reducing service life
Solution Approach 1:
The segmented cage structure distributes compression forces across different radial positions, preventing concentration of stress on the elastic bearing body. The first and second cage parts can be positioned to create optimal stress distribution, enhancing damping while protecting the elastic material from excessive tensile forces that would reduce its service life.
3Stability of the object's composition
If the cage is made rigid to support the bearing body, then structural stability is improved, but the cage cannot accommodate compression without deforming
Solution Approach 1:
The cage transitions from a rigid monolithic structure to a dynamic segmented structure where the distance between cage parts can vary. This allows the cage to maintain structural stability through its supportive function while accommodating compression forces through controlled radial movement, preventing deformation and loss of roundness.
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
The solution extends the service life of bush bearings by allowing for calibrated damping properties without material deformation, maintaining roundness, and preventing fluid leakage, thus enhancing the absorption of compressive loads while maintaining shear direction stiffness.
Implementation Method 1
a bearing body (12) made of elastic material, in particular an elastomer
Implementation Method 2
bushing bearing for vibration-damping mounting of components
Implementation Method 3
Hydraulic damping within the bushing bearing is achieved by the transfer of the hydraulic fluid from one chamber to another
Implementation Method 4
a buttress provided between the cage parts is sealed
Data Source
Figure 1~2
Figure 3~5
AI summary
The present invention relates to a sleeve bearing for being received in an outer sleeve having an inner part (2) which extends in the axial direction, a bearing body (12) which surrounds the inner part (2), is made from an elastic material, and has at least two chambers (16) for receiving a damping means, and a cage (4) which encloses the bearing body circumferentially. The present invention specifies a sleeve bearing with an improved service life. Said sleeve bearing is distinguished by the fact that the cage (4) is formed from at least two cage parts (6), the spacing of which can be varied in the radial direction, and that a joint area (22) which is provided between the cage parts (6) is sealed.