Elevator Rope Terminal With Elastomer Isolating Sleeve
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Solution Overview
Problem
Elevator rope terminal arrangements in prior art are prone to damage and displacement when rope tension is slackened, leading to deteriorated isolation and ride comfort issues.
Innovation Solution
A terminal arrangement featuring an elongated anchoring rod within a helical spring, isolated by an elastomer sleeve, which compresses to resist pull and maintain insulation, with additional isolation components to prevent contact between the rod and spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bushings are used between the anchoring rod and helical spring in prior art, then the isolation is provided, but the bushings are prone to damage and displacement when rope tension is slackened
Solution Approach 1:
The patent introduces an isolating sleeve as an intermediary component between the anchoring rod and the helical spring. This sleeve is made of elastomer material and is fixed to the anchoring rod, extending into the central space of the spring. The isolating sleeve maintains the isolation function while being more resistant to damage and displacement compared to traditional bushings, particularly when rope tension varies.
Solution Approach 2:
The isolating sleeve is made of elastomer material, which combines the properties of flexibility and durability. This composite material approach allows the isolating component to maintain its structural integrity and isolation function under varying tension conditions, preventing the damage and displacement issues experienced with traditional bushing materials.
2Strength
If the anchoring rod extends through the helical spring, then the compression and elastic resistance are achieved, but the rod and spring may contact and cause damage
Solution Approach 1:
The isolating sleeve acts as a mediator between the anchoring rod and the helical spring. It allows the rod to extend through the spring's central space while preventing direct contact between the rod and spring coils, thereby eliminating the harmful contact damage while maintaining the compression and elastic resistance function.
Solution Approach 2:
The isolating sleeve is nested on the anchoring rod and extends into the central space of the helical spring. This nested arrangement allows the rod to pass through the spring without direct contact, with the sleeve providing protection and isolation throughout the interaction zone.
3Reliability
If traditional rope terminal arrangements are used, then the rope fixing is achieved, but the isolation deteriorates over time leading to ride comfort issues
Solution Approach 1:
The isolating sleeve is made of elastomer material, which provides superior durability and maintains its isolation effectiveness over time. This material choice addresses the long-term deterioration issue experienced with traditional bushing arrangements, ensuring consistent ride comfort throughout the elevator's operational life.
Solution Approach 2:
The isolating sleeve is designed as a robust, maintenance-free component that eliminates the need for periodic replacement or adjustment. Unlike traditional bushings that deteriorate and require maintenance, the elastomer sleeve provides lasting isolation performance without compromising ride comfort.
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 robust and durable rope fixing system that maintains ride comfort by preventing damage and displacement, ensuring effective insulation and long-term performance.
Implementation Method 1
the helical spring being arranged be compressed by pull of the elongated anchoring rod towards the support member and to elastically resist pull of the elongated anchoring rod towards the support member
Implementation Method 2
an elongated isolating sleeve for isolating the elongated anchoring rod and the helical spring from each other, which isolating sleeve is made of elastomer and positioned in the central space of the helical spring
Data Source
Figure 1
Figure 2a~3
Figure 4
AI summary
The invention relates to a terminal arrangement (1) of a rope (2) of an elevator comprising an end section (E) of a rope (2); a rope terminal body (3) whereto the end section (E) of the rope (2) is immovably fixed; an elongated anchoring rod (4) having a first end (4a) and a second end (4a), the first end (4a) being in connection with the rope terminal body (3); a fixing base (5, 6); a support member (7) mounted on the fixing base; a helical spring (8) having a first end and a second end, and a hollow central space (C), the first end being supported against the support member (7), the anchoring rod (4) being positioned to extend inside the hollow central space (C) of the helical spring (8), the second end (4b) of the anchoring rod (4) being coupled with the second end of the spring (8), and the helical spring (8) is arranged be compressed by pull of the elongated anchoring rod (4) towards the support member (7) and to elastically resist pull of the elongated anchoring rod (4) towards the support member (7). The anchoring arrangement (1) comprises an elongated isolating sleeve (9) for isolating the elongated anchoring rod (4) and the helical spring (8) from each other, which isolating sleeve (9) is made of elastomer and positioned in the central space (C) of the helical spring (8), and the elongated anchoring rod (4) is positioned inside the isolating sleeve (9), the isolating sleeve (9) surrounding the elongated anchoring rod (4) and extending between the elongated anchoring rod (4) and the helical spring (8) most of the length of the helical spring (8).