Hoist Rope Reeving Attachment for Faster Boom Tip Deployment
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Solution Overview
Problem
Conventional mobile cranes require significant time and effort to extend the hoist rope from the rear of the boom to the boom tip, leading to inefficiencies in load lifting operations.
Innovation Solution
A reeving device with a body having a cavity and a lateral opening that engages the oversized end of the hoist rope, featuring tapered portions to securely connect and guide the rope, along with a tether for tensioning, allows for efficient attachment and detachment of the hoist rope to the winch system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hoist rope is extended from the rear of the boom to the boom tip using conventional methods, then the hoist rope can be deployed, but the process requires significant time and effort
Solution Approach 1:
The hoist rope system is segmented into a main rope and a separate retrieval rope. The retrieval rope is threaded through the main rope to create a pulley system that enables bidirectional movement. This segmentation allows the oversized end to be easily retrieved by pulling the retrieval rope, dramatically reducing the time and effort required compared to conventional single-rope methods
Solution Approach 2:
The retrieval rope acts as an intermediary element that transfers force along the main hoist rope. By threading the retrieval rope through the main rope and creating loops, it serves as a mediator that enables the oversized end to be pulled back to the winch without manual handling, thus improving deployment efficiency
2Reliability
If the oversized end of the hoist rope is used directly, then the rope can be attached to the winch, but the rope end may get stuck on boom sections
Solution Approach 1:
The reeving device serves as an intermediary component between the oversized end and the boom structure. It features a cavity that receives the oversized end and tapered portions that guide it through, preventing direct contact with boom sections that could cause the rope to get stuck. This intermediary mechanism ensures reliable attachment while eliminating the harmful effect of the rope getting caught on boom structures
Solution Approach 2:
The reeving device is designed with self-guiding features where the tapered portions automatically guide the oversized end through the cavity and onto the retrieval rope without external assistance. The geometry of the cavity and tapered sections ensures the rope end is properly positioned and tensioned, making the system self-sufficient in preventing the rope from getting stuck
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 reeving device facilitates faster and more efficient deployment and retrieval of the hoist rope, reducing operational time and effort, while preventing the rope end from getting stuck on boom sections, thus enhancing crane performance.
Implementation Method 1
The body includes an inner tapered portion at least partially bounding the cavity for engaging the oversized end of the hoist rope
Implementation Method 2
pulling a tether attached to the body to tension the hoist rope
Data Source
AI summary
A reeving device for attaching to an end termination of a hoist rope. The reeving device includes a body with a pair of opposing ends, a central portion, and a tapered portion extending from one of the pair of opposing ends to the central portion. The body defines a cavity extending into the central portion, the tapered portion, and at least one of the pair of opposing ends. The cavity is configured to receive the end termination of the hoist rope. A tether is attached to one of the pair of opposing ends, which facilitates pulling the hoist rope using the reeving device. Related methods are also disclosed.