Elevator Roller Guide Assembly with Elastic Damping
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Solution Overview
Problem
Conventional elevator devices require a complex and costly swinging mechanism, urging mechanism, and damper for roller guide assemblies, which increases component costs and installation space.
Innovation Solution
The roller guide assembly employs horizontal fixing shafts with rotatably supported rollers and an annular elastic member between the bearing and the shaft, providing precompression to urge the rollers against the guide rail, acting as a damper to suppress vibrations, and supporting the rollers, eliminating the need for a swinging mechanism and damper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a swinging mechanism with rotation shaft and lever arm is used to support rollers, then the rollers can be swung horizontally to maintain contact with the guide rail, but the structure becomes complicated and requires more space and components
Solution Approach 1:
The patent extracts and eliminates the complex swinging mechanism (rotation shaft, lever arm, bearings) from the conventional structure. Instead, it uses a simple horizontal fixing shaft that directly supports the roller, removing unnecessary components while maintaining the roller's ability to swing horizontally and maintain contact with the guide rail.
Solution Approach 2:
The horizontal fixing shaft serves multiple functions: it supports the roller, allows horizontal swinging motion, and provides a mounting point for the elastic member. This multi-functional design replaces the conventional separate components (rotation shaft, lever arm, bearings) with a single integrated solution.
2Reliability
If a swinging mechanism with multiple shafts and bearings is used, then the rollers can be supported and swung, but the cost of components increases
Solution Approach 1:
The patent removes the expensive rotation shaft and lever arm assembly from the conventional structure. The horizontal fixing shaft directly supports the roller without requiring intermediate lever arms or multiple bearings, significantly reducing component costs while maintaining the necessary support and swinging functions.
Solution Approach 2:
The patent uses simpler, more cost-effective components such as the horizontal fixing shaft and elastic member instead of expensive precision shafts and bearings. This approach prioritizes functional adequacy over high-cost precision components, reducing overall manufacturing costs.
3Reliability
If conventional urging mechanism and damper are used, then the rollers can be urged toward the guide rail and vibrations suppressed, but the structure becomes more complex and requires more installation space
Solution Approach 1:
The patent merges the suspension, urging, and damping functions into a single elastic member (such as a rubber ring or spring) that is mounted on the horizontal fixing shaft. This integrated elastic member simultaneously provides the urging force to maintain roller contact with the guide rail and dampens vibrations, eliminating the need for separate suspension and damper assemblies.
Solution Approach 2:
The elastic member serves multiple functions: it acts as an urging mechanism to press the roller against the guide rail, functions as a damper to suppress vibrations, and provides suspension. This multi-functional component replaces the conventional separate urging mechanism and damper, significantly reducing installation space.
4Reliability
If conventional urging mechanism with springs is used, then the rollers can be urged toward the guide rail, but the structure becomes more complex
Solution Approach 1:
The patent combines the urging function with the damping and suspension functions in a single elastic member. This elastic member is mounted on the horizontal fixing shaft and provides the necessary urging force to maintain roller contact with the guide rail, eliminating the need for a separate spring-based urging mechanism.
Solution Approach 2:
The elastic member simultaneously provides urging, damping, and suspension functions. This multi-functional design replaces the conventional separate urging mechanism (springs), simplifying the overall structure while maintaining the necessary roller contact and vibration suppression.
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 solution reduces component costs and installation space, while maintaining stability and ride quality by using the elastic member's urging and damping functions, and allows for easier maintenance by replacing worn parts without disassembly.
Implementation Method 1
the roller outer circumference portion and the bearing are relatively moved in the horizontal direction with respect to the horizontal fixing shaft, so that a portion of the elastic member on the guide rail's side is compressed. When the force is not acted from the guide rail, the compressed elastic member is likely to be returned to the initial state.
Implementation Method 2
When the roller is moved across and over the stepped portion of the connection portion of the guide rail, the vibration of the elevator car is suppressed since the roller outer circumference portion and the bearing are urged toward the guide rail by the precompression of the elastic member.
Implementation Method 3
When the elevator car receives the offset (unbalanced) load by the offset (unbalanced) position of the load (embarkation), the inclination of the elevator car is suppressed since the elevator car is supported by the guide rail in a state where the elastic member is compressed. Then, when the elastic load is not acted, the elastic member is returned to the initial state.
Data Source
AI summary
An elevator car (1) which moves vertically along the hoistway is provided with a roller guide assembly (3) guided by a guide rail (2). The roller guide assembly (3) is provided with a horizontal fixing shaft (8) which is fixed to a base member (6) and rollers (5a, 5b, 5c) which are supported by the horizontal fixing shaft (8). The rollers (5a, 5b, 5c) are each provided with a roller outer circumference section (10), a rolling bearing (9), an annular rubber (11), and an inner cylinder (12). The configuration eliminates the need for a conventional spring or a conventional damper mechanism because the rubber (11) deforms elastically.