Cross-Type Earthquake Platform With Needle Rollers
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Solution Overview
Problem
Existing earthquake-resistant designs, such as those using damping devices with multiple steel and plastic layers, face limitations in vertical load bearing efficacy and suffer from material aging and cracking issues, which compromise their performance in withstanding seismic forces.
Innovation Solution
A cross-type earthquake platform with a bearing block and guide rails featuring needle rollers and guide grooves, allowing for relative sliding motion to offset seismic forces, enhancing both vertical and horizontal load bearing capabilities while preventing component separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If damping devices with multiple steel and plastic layers are used, then horizontal seismic force offset is improved, but vertical load bearing efficacy deteriorates
Solution Approach 1:
The damping device is segmented into distinct functional components: guide rails for horizontal motion, bearing blocks for vertical support, and needle rollers for friction reduction. This segmentation allows each component to specialize in its primary function without compromising the other.
Solution Approach 2:
Needle rollers are introduced as intermediary elements between the guide rails and bearing blocks. These rollers mediate the interaction between horizontal and vertical loads, enabling smooth horizontal movement while maintaining vertical load-bearing capacity through rolling contact.
2Ease of manufacture
If plastic materials are used in damping devices, then manufacturing cost is reduced, but durability deteriorates due to aging and cracking
Solution Approach 1:
The invention employs composite construction combining metal guide rails, bearing blocks, and needle rollers with plastic damping layers. The metal components provide structural strength and durability, while the plastic layers provide cost-effective damping functionality.
Solution Approach 2:
The plastic damping layers are designed as replaceable, cost-effective components that can be easily replaced when worn, while the durable metal structural components remain in service. This approach prioritizes overall system reliability while maintaining affordability.
3Stability of the object's composition
If fixed fastening is used between damping device and structure, then structural stability is improved, but adaptability to seismic motion deteriorates
Solution Approach 1:
The connection system transitions from static fixed fastening to dynamic sliding contact. The guide rails and bearing blocks are firmly anchored to the structure, but the needle rollers enable dynamic relative motion during earthquakes, combining structural stability with seismic adaptability.
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 cross-type platform effectively absorbs seismic waves, providing significant load bearing efficacy and durability, thereby protecting buildings, machines, and equipment from earthquake impacts while preventing damage and injury.
Implementation Method 1
a plurality of needle rollers accommodated in the roller holders and rotatably kept in contact between the bearing block and the guide rails
Implementation Method 2
enabling the guide rails to be moved relative to each other on the opposing top wall and bottom wall of the bearing block
Data Source
AI summary
A cross-type earthquake platform includes a bearing block, two guide rails, two roller holders and multiple needle rollers. The bearing block has sliding grooves located at opposing top and bottom walls thereof and respectively extended in X-axis and Y-axis, and needle roller guide grooves located in horizontal bottom wall and upright sidewalls of each sliding groove. Each guide rail has needle roller guide grooves located at the top wall thereof. The needle rollers are mounted in the roller holders to support the guide rails at the opposite top and bottom walls of the bearing block. Further, retractable dust covers are respectively capped on the guide rails to protect the needle rollers against external dust.