Elevator Hoisting Machine Mounting Device Buckling Suppression
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Solution Overview
Problem
Conventional elevator hoisting machines have limited space for maintenance and inspection due to elastic support structures, and increased space requirements for oscillation damping during earthquakes, making maintenance difficult and space inefficient.
Innovation Solution
An elevator hoisting machine mounting device with an elastic support device and a buckling suppression device that uses first and second buckling suppression elastic bodies to sandwich a buckling suppression attachment portion on the hoisting machine unit, reducing the space needed for installation and allowing easier access for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the upper portion and lower portion of the hoisting machine are supported by the frame body or supports via elastic bodies, then oscillation is damped, but the space for performing maintenance and inspection operations on the hoisting machine becomes small
Solution Approach 1:
The support structure is divided into two distinct functional segments: elastic support devices for oscillation damping and buckling suppression devices for structural stability. This segmentation allows each component to perform its specific function without interfering with maintenance access, as the buckling suppression device is positioned separately from the elastic support devices.
Solution Approach 2:
The buckling suppression function is extracted from the elastic support structure and implemented as a separate device. This extraction eliminates the interference between support functions and maintenance access, allowing maintenance personnel to work on the hoisting machine without obstruction from integrated support structures.
2Reliability
If the distance between the first elastic body and the second elastic body is increased to stabilize the support structure during earthquakes, then oscillation resistance is improved, but the space occupied in the horizontal direction by the support beam increases
Solution Approach 1:
The buckling suppression device acts as an intermediary between the hoisting machine and the machine base, providing seismic stability through a compact vertical arrangement. This intermediary structure eliminates the need for wide horizontal spacing between elastic bodies, as the buckling suppression mechanism operates independently in the vertical direction.
Solution Approach 2:
The support structure transitions from a horizontal arrangement (requiring wide spacing between elastic bodies) to a vertical arrangement (with buckling suppression devices positioned above and below the hoisting machine). This dimensional change maintains seismic stability while minimizing horizontal space occupation.
3Stability of the object's composition
If a support beam is used to support the hoisting machine via elastic bodies disposed at a distance in the horizontal direction, then structural stability is improved, but the device complexity increases
Solution Approach 1:
The buckling suppression device performs multiple functions: it provides structural stability, prevents buckling during seismic events, and maintains compact horizontal dimensions. This multi-functionality eliminates the need for separate support beams and elastic bodies arranged horizontally, simplifying the overall support structure.
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 buckling suppression device effectively reduces the space required for the hoisting machine mounting, allowing for easier maintenance and inspection operations by minimizing the horizontal space occupied and eliminating the need for additional oscillation suppression structures above the hoisting machine.
Implementation Method 1
a supporting elastic body that deforms elastically upon reception of a load from the hoisting machine unit
Implementation Method 2
buckling of the hoisting machine unit relative to the machine base due to the elastic deformation of the supporting elastic body is suppressed by an elastic restoring force of the first and second buckling suppression elastic bodies
Data Source
AI summary
In an elevator hoisting machine mounting device, an elastic support device includes a supporting elastic body that deforms elastically upon reception of a load from a hoisting machine unit. A buckling suppression device disposed at a remove from the elastic support device in a horizontal direction includes first and second buckling suppression elastic bodies that sandwich, from above and below, a buckling suppression attachment portion provided on a lower portion of the hoisting machine unit, and a holding tool that holds the first and second buckling suppression elastic bodies on a machine base. The buckling suppression device suppresses, by an elastic restoring force of the first and second buckling suppression elastic bodies, buckling of the hoisting machine unit relative to the machine base due to the elastic deformation of the supporting elastic body.