Elevator Car Pulley Support Structure Without a Protruding Tie Rod
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The protrusion of a tie rod beyond the car outside measurement in an elevator car restricts the arrangement and design of hoistway devices, necessitating interference checks and structural reviews, and requires a tie rod to suppress car floor inclination.
Innovation Solution
An elevator car design that includes a car frame with vertical and lower frames, floor support beams, under-car pulleys, pulley support members, and linking members to transfer upward forces from the main rope to the vertical frames, eliminating the need for a tie rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a tie rod is used to suppress car floor inclination, then the car floor stability is improved, but the tie rod protrudes beyond the car outside measurement and restricts the arrangement of hoistway devices
Solution Approach 1:
The patent extracts the protruding tie rod from the system and replaces it with a floor support beam structure that integrates the anti-inclination function within the car body boundaries. The floor support beam is connected to the car frame and counterweight guide rail, providing the necessary structural support without extending beyond the car outside measurement.
Solution Approach 2:
The patent merges the floor support function and the anti-inclination function into a single integrated floor support beam structure. This beam simultaneously supports the car floor and prevents inclination through its connection to the car frame and counterweight guide rail, eliminating the need for a separate tie rod.
2Stability of the object's composition
If a tie rod protrudes beyond car outside measurement is used, then car floor inclination is suppressed, but interference checks and structural reviews are required between elevator car and hoistway devices
Solution Approach 1:
The patent removes the protruding tie rod element that causes interference issues and replaces it with an internal floor support beam structure. This extraction eliminates the need for interference checks between the car and hoistway devices while maintaining the anti-inclination function through the beam's integration with the car frame and guide rail.
3Stability of the object's composition
If a tie rod is used to suppress car floor inclination, then the car floor stability is improved, but the structural complexity and number of components increase
Solution Approach 1:
The patent combines multiple functions into the floor support beam: structural support for the car floor, anti-inclination through connection to the car frame and counterweight guide rail, and integration with the existing car frame structure. This merging reduces the total component count compared to using a separate tie rod while maintaining all necessary functions.
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 design effectively suppresses car floor inclination without a tie rod, enhancing structural rigidity and preventing foreign object entry into pulleys while maintaining the car's posture and reducing structural complexity.
Implementation Method 1
an under-car pulley disposed below the car floor; a pulley support member fixed to the floor support beam and rotatably supporting the under-car pulley; and a linking member linking the vertical frames and the floor support beam. The elevator car has a structure in which an upward force exerted on the pulley support member and the floor support beam by a main rope that is wound around the under-car pulley is received by the linking member and the vertical frames
Data Source
AI summary
This elevator car includes: a car frame having a pair of vertical frames and a lower frame linking lower ends of the pair of vertical frames; a floor support beam supporting a car floor and supported on the lower frame; an under-car pulley disposed below the car floor; a pulley support member fixed to the floor support beam and rotatably supporting the under-car pulley; and a linking member linking the vertical frames and the floor support beam. The elevator car has a structure in which an upward force exerted on the pulley support member and the floor support beam by a main rope that is wound around the under-car pulley is received by the linking member and the vertical frames.