Elevator Hoisting Machine Multi-Point Fixing and Elastomer Damping
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Solution Overview
Problem
The challenge is to increase the rigidity of a hoisting machine while minimizing its size, particularly when it is fixed to a support structure, while also maximizing the space utilization in an elevator hoistway, as existing solutions compromise on rigidity and noise levels when compacted.
Innovation Solution
The hoisting machine is fixed to an elongated support structure with multiple points, using elastomer dampers to absorb vibrations and resist bending forces, allowing for a more lightweight and efficient design that maintains rigidity without the need for excessive structural rigidity, and incorporating a stiffener rib for additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the hoisting machine is made compact to maximize space utilization, then the space efficiency is improved, but the rigidity of the hoisting machine deteriorates
Solution Approach 1:
The patent transitions from single-point fixation to multi-point fixation distributed in space. By fixing the hoisting machine at multiple points (at least two points) on the support structure, the solution adds spatial dimensionality to the support system, thereby achieving both compact size and sufficient rigidity without requiring excessive structural mass.
Solution Approach 2:
The patent employs elastomer dampers as intermediary elements between the hoisting machine and the support structure. These elastomer elements provide both mechanical support and vibration damping functionality, creating a composite support system that maintains rigidity while allowing for compact design and reducing noise transmission.
2Volume of moving object
If the hoisting machine is made compact to fit narrow spaces, then the space utilization is improved, but the noise level increases
Solution Approach 1:
The patent introduces elastomer dampers as intermediary elements between the hoisting machine and the support structure. These elastomer elements serve as mediators that absorb and dampen vibrations generated by the hoisting machine, thereby reducing noise transmission to the support structure and surrounding environment while maintaining the compact design.
3Device complexity
If the hoisting machine is fixed at a single point to simplify installation, then the device complexity is reduced, but the rigidity and vibration damping deteriorate
Solution Approach 1:
The patent divides the fixation system into multiple discrete fixing points (at least two points) distributed on the support structure. This segmentation of the support system provides both simplified installation at each individual point and enhanced overall rigidity through the distributed multi-point configuration, while also improving vibration damping characteristics.
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 effectively dampens vibrations and maintains structural integrity, enabling a more compact and efficient hoisting machine design that can handle bending forces without the need for excessive rigidity, thus optimizing space usage in elevator hoistways.
Implementation Method 1
The hoisting machine is connected from its fixing points to a fixing means/to fixing means with dampers that are preferably of elastomer
Implementation Method 2
dampers that are preferably of elastomer
Implementation Method 3
incorporating a stiffener rib for additional support
Data Source
Figure 1
Figure 2
Figure 3a~3d
AI summary
The invention relates to an elevator assembly, which comprises an elevator car (15); which elevator car is suspended in the elevator hoistway with suspension means (16); and which elevator assembly comprises a hoisting machine (2) for moving the elevator car (15) along a guide rail (9) fixed to a wall part (17) of the elevator hoistway; the stationary structure (3) of which hoisting machine (2) comprises a stator (18); and the rotating structure (4) of which hoisting machine comprises a rotor (20) and also a traction sheave (5); which traction sheave (5) comprises a traction surface (14) for receiving the aforementioned suspension means (16); which suspension means (16) are rotatably supported with the aforementioned traction surface (14); and which stator (18), rotor (20) and traction sheave (5) are fitted concentrically onto the axis of rotation (19) of the hoisting machine; and which hoisting machine (2) is fitted into connection with the aforementioned guide rail (9) fixed to a wall part (17) of the elevator hoistway apart from the wall surface such that the suspension means (16) arriving at the traction surface (14) and/or leaving from the traction surface of the traction sheave travel closer to the wall part (17) of the elevator hoistway than the rear part (21) of the guide rail; and the rotating structure (4) of which hoisting machine is supported on the stationary structure (3) of the hoisting machine via one or more bearings (24); and the stationary structure (3) of which hoisting machine is further supported on the aforementioned guide rail (9) fixed to a wall part of the elevator hoistway such that the guide rail (9) bears the force exerted on the traction surface (14) via the suspension means (16); such that the stator (18) of the hoisting machine comprises a concentrated fractional-slot winding, the slot number q of which is smaller than 0.5; and that the distance of the rear surface (21) of the aforementioned guide rail (9) fixed to a wall part (17) of the elevator hoistway from the aforementioned wall part (17) of the elevator hoistway is selected to be: a) at least 120 millimeters and at most 170 millimeters when the nominal load of the elevator car (15) is at most 480 kg; b) at least 128 millimeters and at most 170 millimeters when the nominal load of the elevator car (15) is greater than 480 kg and smaller than, or equal to, 680 kg; c) at least 150 millimeters and at most 195 millimeters when the nominal load of the elevator car (15) is greater than 680 kg and smaller than 1155 kg.