Clam Shell Linear Motion Bearing Assembly with Interlocking Housing
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Solution Overview
Problem
Existing linear motion bearing systems face challenges in efficiently transmitting loads and facilitating smooth movement along a shaft due to limitations in the design of rolling element retaining segments and housing structures, which often require separate retainer structures and complex assembly processes.
Innovation Solution
The proposed linear motion bearing assembly features a rolling element retainer structure with open load bearing and return portions, interconnected by turnarounds, and an outer housing sleeve that encloses the retainer structure, along with interlocking bearing block segments, to securely position and transmit loads, allowing for efficient movement and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate retainer structures are used to hold rolling elements, then the rolling elements can be securely retained in the tracks, but the device complexity increases and assembly becomes more difficult
Solution Approach 1:
The patent merges the retainer structure with the housing by forming retaining segments that are integrally molded into the housing sleeves. The rolling element tracks are directly formed in the housing material, eliminating the need for separate retainer components. This integration maintains secure rolling element retention while significantly reducing device complexity and the number of parts.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it provides structural support, guides the rolling elements through formed tracks, and acts as the retainer mechanism through integrally formed retaining segments. This multi-functionality eliminates the need for dedicated retainer structures, reducing complexity while maintaining reliability.
2Reliability
If complex housing structures are used to enclose rolling element tracks, then the rolling elements are properly guided and retained, but the assembly process becomes more difficult and time-consuming
Solution Approach 1:
The housing is divided into modular sleeves that can be independently manufactured and then assembled. Each sleeve contains integrated retaining segments and tracks, allowing for simplified individual manufacturing while maintaining proper rolling element guidance. The modular design facilitates easier assembly compared to a single complex housing structure.
Solution Approach 2:
The housing structure combines guidance features, retention mechanisms, and structural support into a single integrated component formed by direct molding. This integration eliminates the need for separate assembly steps for installing retainers and guidance features, significantly simplifying the manufacturing process while ensuring proper rolling element guidance.
3Ease of operation
If traditional bearing assemblies are used that require disassembly of the shaft, then the bearing can be properly installed and removed, but the system realignment and assembly time increases
Solution Approach 1:
The bearing assembly is designed with movable, adjustable components that can be dynamically repositioned during installation and removal. The modular sleeves and integrated retaining segments allow the bearing to be easily detached from the shaft without requiring shaft disassembly, enabling quick maintenance while maintaining proper alignment through the flexible 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 design enhances load transmission and movement efficiency while simplifying assembly and maintenance by eliminating the need for separate retainer structures and allowing for easy installation and removal of the bearing without disassembly of the shaft, reducing system realignment and assembly time.
Implementation Method 1
a plurality of bearing rolling elements disposed in the rolling element tracks, the rolling elements effective to transmit a load from a shaft to load bearing plates and to facilitate a movement of the linear motion bearing assembly along the shaft
Implementation Method 2
the outer housing sleeve having an inner surface in direct contact with the load bearing plates, the outer housing sleeve being configured and dimensioned to maintain the load bearing plates in position and effective to receive load from the load bearing plates
Data Source
AI summary
A linear motion bearing assembly comprising a rolling element retainer structure and an outer housing sleeve enclosing substantially all of an exposed exterior surface of said rolling element retainer structure. A bearing block effective to enclose substantially all of an exposed exterior surface of the outer housing sleeve, the bearing block including a first bearing block segment effective to enclose a first part of the outer housing sleeve; and a second bearing block segment effective to enclose a second part of the outer housing sleeve, wherein the first bearing block segment and the second bearing block segment include first elements and second elements effective to interlock with each other when the bearing block encloses the outer housing sleeve.