Rope Hoist Drum Support with Asymmetric Positioning
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Solution Overview
Problem
The existing rope hoist designs, such as in PTL1, face challenges in manufacturing efficiency due to complex assembly processes, require labor-intensive detachment of screws and holding components, and lack clear positioning references, leading to potential misalignment and increased component count.
Innovation Solution
A rope hoist design featuring a frame structure with specific support parts, connection members, and a support shaft that allows for improved attachability and clear positioning of the rope drum mechanism, reducing the need for complex assembly and minimizing the number of components required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rope drum mechanism is assembled as a single unit and attached to the attachment element, then manufacturing efficiency is improved, but the attachment process becomes complex requiring detachment of screws and holding components
Solution Approach 1:
The rope drum mechanism is divided into modular components: the rope drum, the gear unit with pinion gear, and the support structure with holding components. These segments can be assembled separately and then attached to the attachment element, simplifying the overall assembly process while maintaining manufacturing efficiency.
Solution Approach 2:
The holding components (13a, 13b) are pre-positioned on the support structure before final attachment to the attachment element. The screws (11, 16) are pre-installed in the holding components, allowing for preliminary assembly verification before final mounting, thereby reducing on-site assembly complexity.
2Ease of operation
If screws and holding components are detached for attachment, then the rope drum mechanism can be attached to the attachment element, but the longitudinal beams become detached causing components to fall to pieces
Solution Approach 1:
The holding components (13a, 13b) are integrated with the longitudinal beams (5a, 5c) through screw connections (11, 16), creating a unified assembly unit. This merging ensures that when holding components are detached for attachment operations, the longitudinal beams remain structurally connected through their own fastening system, preventing component dispersal.
Solution Approach 2:
The holding components serve as intermediary elements between the rope drum mechanism and the attachment element. They provide a dedicated attachment interface that can be independently detached without affecting the structural integrity of the longitudinal beams, which are maintained through separate fastening arrangements.
3Stability of the object's composition
If both-end support state is used for holding components, then structural stability is improved, but clear positioning reference is lost and additional components are required
Solution Approach 1:
The holding components (13a, 13b) are designed with asymmetric features relative to the attachment element. One holding component is positioned closer to the attachment element than the other, creating an inherent positioning reference. This asymmetric arrangement maintains both-end support stability while providing clear positioning guidance during assembly, eliminating the need for additional positioning components.
Data Source
AI summary
A rope hoist includes a rope drum mechanism easy to attach to a frame structure and clarified positioning reference. The rope drum is rotatably supported by a first support part on one end side and a second support part on another end side of the rope drum. A pair of supporting ribs having clearances with respect to a first drum support frame is provided with the first support part. A first connection member penetrates the supporting ribs and the first drum support frame in a state of both-end support. A second connection member penetrates a frame attachment portion and a second drum support frame in a state of cantilever. A support shaft couples the first support part and the second support part and is arranged on an axis passing through a position different from positions of the first connection member and the second connection member.