Pneumatic Bearing Assembly Frictionless Linear Guide Rail
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Solution Overview
Problem
Current linear guide bushings experience wear, friction, and noise due to direct contact with the rail, and are limited by requiring lubrication and only being compatible with round rails supported at the ends, which can cause rail bending under weight and force.
Innovation Solution
A pneumatic bearing assembly with a bearing housing and liner that uses a pressurized pneumatic source to create a frictionless air cushion between the bearing liner and the cylindrical rail, featuring a distribution slot and bearing slots to distribute air pressure and reduce contact, along with bonding slots and apertures for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional linear guide bushings make direct contact with the rail, then structural support is provided, but friction, wear, and noise increase
Solution Approach 1:
The patent employs a pneumatic bearing assembly that uses compressed air to create a cushion between the bearing liner and the linear guide rail. Air inlet passages deliver pressurized air to an air cushion chamber, generating a pneumatic film that separates the bearing surface from the rail, eliminating direct contact and thereby reducing friction, wear, and noise while maintaining structural support capability
Solution Approach 2:
The invention replaces the traditional mechanical contact-based support system with a pneumatic field-based support system. Instead of relying on solid-to-solid contact for load bearing, the system uses a pressurized air cushion to provide the necessary support force, substituting mechanical friction-based support with pneumatic pressure-based support
2Ease of operation
If lubrication is applied to reduce friction, then movement smoothness improves, but wear still occurs due to contact
Solution Approach 1:
The pneumatic bearing assembly replaces lubrication-based friction reduction with pneumatic cushioning. Compressed air is delivered through inlet passages to create a pressurized air film that separates the bearing liner from the rail, providing frictionless operation without requiring lubrication, thereby eliminating wear while maintaining smooth movement
3Ease of manufacture
If bushings wrap around round rails for support, then ease of installation improves, but rail bending occurs under weight and force
Solution Approach 1:
The bearing assembly is designed as a segmented structure with a bearing housing and liner that can accommodate different rail configurations. The modular design allows the bearing to be mounted on various support structures rather than wrapping around the rail, distributing loads more effectively and preventing rail bending while maintaining ease of installation
Solution Approach 2:
The bearing housing acts as an intermediary structure between the support mechanism and the linear guide rail. Instead of the bushing directly wrapping around and potentially causing stress concentration on the rail, the housing provides a rigid mounting structure that distributes forces evenly, preventing rail bending while simplifying installation
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 pneumatic bearing assembly significantly reduces wear, friction, and noise by providing a substantially frictionless surface for the linear guide rail, accommodating flexing and supporting structures with reduced contact and increased compatibility with various rail configurations.
Implementation Method 1
uses a pressurized pneumatic source to create a frictionless air cushion between the bearing liner and the cylindrical rail
Implementation Method 2
A bearing liner has an outer surface dimensioned to be received within the interior chamber of the bearing housing. The bearing liner has a distribution slot inscribed in an outer surface of the bearing liner that is in fluid communication with the plurality of interior passages of the bearing housing. A plurality of bearing slots are inscribed in an interior surface of the bearing liner, with the plurality of bearing slots in fluid communication with the distribution slot.
Data Source
AI summary
A pneumatic bearing assembly for a linear guide rail system. The pneumatic bearing assembly provides a substantially frictionless bearing surface between the bearing assembly and the linear guide rail system. The bearing assembly includes a bearing housing to support a payload on the guide rail system and a bearing insert in an interior chamber of the housing. A plurality of pneumatic passages communicate a pressurized pneumatic source through the bearing housing to an interior surface of the bearing insert. The unique orientation of the plurality of pneumatic passages distributes the pressurized pneumatic source to provide a pneumatic cushion between the bearing assembly and the linear guide rail system.