Conveying Device Self-Boosting Link Mechanism
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Solution Overview
Problem
Existing self-propelled elevators require large springs to press the driving wheels against the rail with sufficient force to generate a frictional force that can support the car weight, leading to increased car weight and energy requirements.
Innovation Solution
A conveying device with a loading-weight supporting section and a first driving device that includes a first wheel unit and a first coupling section, where the first wheel unit has a driving wheel in contact with a guide surface on the rail, and the first coupling section uses a link for self-boosting to generate a pressing force that supports the car weight with a mechanism lighter in weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If large springs are used to press the driving wheels against the rail with sufficient force, then the frictional force can support the car weight, but the car weight increases
Solution Approach 1:
The driving wheel unit utilizes the car's own weight to generate the pressing force against the rail through gravitational action on the coupling section, eliminating the need for external springs. The system serves itself by converting the car weight into the necessary frictional force for support.
Solution Approach 2:
The coupling section acts as a counterweight mechanism where the second connecting section (arranged above the first) creates a gravitational moment that presses the driving wheel against the rail. This counterbalances the need for additional pressing mechanisms by using the car's own weight distribution.
2Force
If large springs are used to press the driving wheels against the rail, then sufficient frictional force is generated, but energy requirements increase
Solution Approach 1:
The system uses the car's weight and gravitational force to automatically generate the pressing force, requiring no additional energy input for maintaining wheel-rail contact. The gravitational potential energy of the car configuration itself provides the necessary force.
Solution Approach 2:
The coupling section is designed so that the gravitational force acts through a configuration that naturally maintains the pressing force without requiring additional energy expenditure. The arrangement of connecting sections creates a gravitational equilibrium that sustains the frictional force.
3Force
If large springs are used to press the driving wheels against the rail, then the frictional force can support the car weight, but wear on the rail and driving wheels increases
Solution Approach 1:
The system generates pressing force through gravitational action on the coupling section rather than continuous spring compression, creating a more stable and controlled frictional force that reduces impact and sliding wear between the driving wheel and rail.
Solution Approach 2:
The coupling section arrangement (with the second connecting section above the first at less than 45 degrees from horizontal) changes the mechanical parameters of force application, distributing the pressing force more evenly and reducing peak stresses that cause wear.
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 conveying device effectively supports the car weight with a lighter mechanism, reducing energy requirements and minimizing wear on the rail and driving wheels, while maintaining stable operation.
Implementation Method 1
The driving wheels are in contact with a rail. The car is supported by a frictional force generated between the driving wheels and the rail.
Implementation Method 2
the second connecting section is arranged above the first connecting section, and a tilt angle from a horizontal plane of a straight line connecting the first connecting section and the second connecting section is smaller than 45 degrees
Data Source
AI summary
There is provided a conveying device that can support a car weight with a mechanism lighter in weight. A driving device (6) of a conveying device that lifts and lowers a loading-weight support along a rail (3) includes a wheel unit (13) and a link (14). The wheel unit (13) drives to rotate a driving wheel (15) in contact with a guide surface (11) to lift and lower the loading-weight support. The link (14) includes a first joint (17) connected to the wheel unit (13) and a second joint (18) rotatably supported by the loading-weight support. The second joint (18) is arranged in a position further apart from the guide surface (11) than the first joint (17), and above the first joint (17). The link (14) is arranged such that a straight line connecting the first joint (17) and the second joint (18) is tilted smaller than 45 degrees.