Double-Deck Elevator Car Displacement via Push Chain
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Solution Overview
Problem
Existing double-deck elevator displacement devices have large space requirements, particularly in the horizontal direction, and can produce unpleasant odors due to hydraulic components.
Innovation Solution
A compact and lightweight displacement and drive system using a push chain and drive device, where the push chain is coupled between an upper and lower car, allowing vertical adjustment of the car distance without the need for large space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hydraulic displacement device is used to adjust the vertical distance between cars, then the displacement function is achieved, but the device produces unpleasant odors due to hydraulic oil and requires relatively large space
Solution Approach 1:
The patent extracts and removes the hydraulic displacement device from the elevator system, replacing it with a counterweight-based displacement mechanism. This eliminates the source of unpleasant odors (hydraulic oil) while reducing the space requirement for the displacement device, as the counterweight system integrates more compactly within the elevator shaft structure.
Solution Approach 2:
The patent replaces the hydraulic displacement device with a mechanical counterweight-based system. The counterweight is connected to the elevator car through a chain or cable, and its movement is controlled by a mechanical drive mechanism (such as a motor-driven reel or winch). This mechanical substitution eliminates hydraulic oil and its associated odors while providing a more space-efficient solution.
2Ease of operation
If a spindle drive with toothed rack is used to displace the car, then the displacement function is achieved, but the space requirement in horizontal and vertical directions increases
Solution Approach 1:
The patent transitions from a horizontal spindle drive mechanism to a vertical counterweight-based system. The counterweight moves vertically within the elevator shaft, utilizing the vertical dimension more efficiently. This dimensional change allows the displacement function to be achieved with reduced horizontal space requirements, as the mechanism operates primarily in the vertical direction within the existing shaft structure.
Solution Approach 2:
The counterweight and its supporting structure are integrated into the existing elevator shaft structure, nesting the displacement mechanism within the available vertical space. The chain or cable connecting the counterweight to the car runs through the shaft, utilizing the existing structural envelope rather than requiring additional horizontal space for the displacement mechanism.
3Productivity
If the elevator shaft cross-sectional area is enlarged to accommodate larger displacement devices, then the displacement function is improved, but the overall elevator system size and installation space increase
Solution Approach 1:
The patent changes the fundamental parameters of the displacement system by replacing bulky horizontal mechanisms with a vertical counterweight system. This parameter change allows the same displacement capability to be achieved with a more compact footprint, maintaining the elevator shaft's cross-sectional area while improving the displacement function through optimized vertical space utilization.
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 solution provides a space-efficient and odor-free means to adjust the vertical distance between cars in a double-deck elevator, addressing the challenges of limited space and odor issues in existing systems.
Implementation Method 1
The push chain is arranged such that the second car exerts a pressure load on the force absorption section of the push chain due to gravity
Data Source
AI summary
An elevator car arrangement for a double-deck elevator has a car frame; a first car coupled to the car frame; a second car arranged on the car frame above or below the first car and coupled to the car frame so as to be movable in a vertical direction relative to the car frame and relative to the first car; a push chain coupled, with a first end of a force absorption section of the push chain, to the first car or to the car frame, and with an opposite, second end of the force absorption section to the second car, and is arranged such that the second car exerts a pressure load on the force absorption section due to gravity; and a drive device coupled to the push chain to displace the second car in the vertical direction relative to the first car by the push chain.