Pulley Wheel Rack Alignment Mechanism
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Solution Overview
Problem
The alignment of pulley wheels in elevators is time-consuming and labor-intensive, particularly when multiple pulley wheels need to be adjusted for tilt and toe angles, and existing methods like screw adjustment or shimming plates require heavy lifting and are not precise.
Innovation Solution
A pulley wheel rack system with a rotatable axle secured by a ball joint and tightener, allowing for three-dimensional adjustment of the pulley wheel's tilt and toe angles using vertical and horizontal adjusters, minimizing the need for heavy lifting and improving precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If screw adjustment is used to align pulley wheels, then the alignment can be adjusted, but the midpoint of the pulley wheel moves away from its initial position and the operation becomes imprecise
Solution Approach 1:
The patent introduces an intermediary alignment mechanism consisting of adjustable support structures that hold the pulley wheel without requiring direct manipulation of the pulley itself. This intermediary system allows alignment adjustments while keeping the pulley wheel's midpoint fixed, thereby maintaining both ease of operation and measurement precision.
2Manufacturing precision
If shimming plates are used to align pulley wheels, then alignment can be achieved, but the process requires heavy lifting work and is time-consuming
Solution Approach 1:
The patent implements preliminary action by pre-positioning adjustable support structures and shimming mechanisms before the pulley wheel is installed. This allows alignment to be achieved through simple adjustments rather than requiring heavy lifting and repeated positioning, significantly reducing both time and physical effort while maintaining precision.
3Reliability
If multiple pulley wheels are aligned using traditional methods, then each wheel can be adjusted, but the operation becomes extensive and labor-intensive
Solution Approach 1:
The patent creates a universal alignment system where a single adjustable support structure can accommodate and align multiple pulley wheels. This multi-functional apparatus allows technicians to align several wheels using the same mechanism and procedures, maintaining reliable rope alignment while dramatically improving productivity by eliminating the need for separate extensive operations for each wheel.
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
Significantly reduces alignment time, enhances precision, and eliminates the need for heavy lifting by allowing the pulley wheel to be securely positioned without moving its center point, ensuring accurate alignment of elevator ropes.
Implementation Method 1
an axle configured to extend from the first frame to the second frame, and configured to be rotatable into different securable positions by a ball joint arranged into the first frame and the second frame
Data Source
AI summary
A pulley wheel rack includes a first rack part and a second rack part; a pulley wheel space between the first rack part and the second rack part; a first frame arranged to the first rack part, and a second frame arranged to the second rack part; an axle configured to extend from the first frame to the second frame, and configured to be rotatable into different securable positions by a ball joint arranged into the first frame and the second frame; and a pulley wheel bearing-mounted on the axle by hub bearings, and including at least one traction surface for engaging an elevator rope. A method for aligning a pulley wheel in a pulley wheel rack is also disclosed.