Crane Guy Link Retainer Slope Surfaces
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Solution Overview
Problem
The existing configuration of cranes with guy lines faces difficulties in storing and disassembling the width guy link due to its deviation from the predetermined position caused by the stretching of guy cables under weight and tensile force, making it challenging to accommodate and remove the pin connections between the guy cable and the width guy link.
Innovation Solution
A crane design featuring a linking and retaining structure on the boom with a pair of slope surfaces and a recess part that guides and retains the coupling member of the guy link coupling part, allowing it to move towards the distal end and be securely positioned, thereby facilitating the accommodation of the width guy link at the predetermined position and releasing tensile forces for easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guy cable stretches due to weight or tensile force, then the guy link coupling part deviates from the predetermined storage position toward the proximal end of the boom, but this makes it difficult to store the width guy link at the predetermined position
Solution Approach 1:
A retainer structure is introduced as an intermediary component between the guy link coupling part and the boom. The retainer includes a recess portion that receives the coupling member and slope surfaces that guide its movement, mediating the interaction between the stretching cable and the storage position to enable automatic return to the correct location
Solution Approach 2:
The slope surfaces are configured to preemptively counteract the deviation caused by cable stretching. When the coupling member moves toward the proximal end due to stretching, the slope surfaces automatically guide it back toward the distal end, preventing permanent displacement and ensuring it returns to the predetermined storage position
2Reliability
If the guy cable stretches in disassembling of the boom, then tensile force occurs in the guy cable and width guy link, but this makes it difficult to remove pins connecting the guy cable and width guy link
Solution Approach 1:
The retainer structure with slope surfaces enables the guy link coupling part to self-correct its position automatically. During disassembly, when the coupling member is pulled toward the proximal end by tensile force, the slope surfaces guide it back to the distal end, allowing the pin to be removed without manual intervention to counteract the tensile force
3Ease of operation
If a retainer structure with slope surfaces and recess part is added to the boom, then the width guy link can be easily accommodated at the predetermined position, but the device complexity increases
Solution Approach 1:
The retainer structure is merged with the boom itself, integrating the storage function directly into the existing structure. The recess portion and slope surfaces are formed as part of the boom, eliminating the need for separate, complex retaining mechanisms while still achieving the desired automatic positioning function
Data Source
AI summary
Provided is a crane including a guy link coupling part easily accommodatable at a predetermined position thereof. The guy link coupling part has a pair of left and right link members each extending in a front-rear direction, and a coupling member extending in a left-right direction and connecting the pair of link members to each other. A linking and retaining structure includes a first retainer provided on a boom for retaining the coupling member to restrict the coupling member from moving in the front-rear direction. The first retainer has: a first slope surface slanting inward of the boom, from a proximal position of the boom toward a distal end thereof; a second slope surface located closer to the distal end of the boom than the first slope surface and slanting outward of the boom; and a recess part disposed between the first slope surface and the second slope surface.