Safety Shear Bolt Coupling to Prevent Head Drop After Shearing
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Solution Overview
Problem
Conventional shear bolts pose a risk of accidental dropping of the sheared bolt head during installation, which can lead to damage or injury, especially in situations where mechanics wear heavy gloves.
Innovation Solution
A safety shear bolt design that incorporates a coupling mechanism to releasably and rotatably connect the sheared head portion to the main bolt portion, preventing free longitudinal movement and thus preventing accidental dropping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shear bolt with an extended torque head portion is used to ensure proper torque application, then the torque control function is improved, but the risk of accidental dropping of the sheared head portion increases
Solution Approach 1:
A coupling mechanism acts as an intermediary between the sheared head portion and the main bolt portion. This coupling mechanism includes a coupling member that engages with both the sheared head portion and the main bolt portion, preventing the head portion from falling while allowing it to rotate freely. The coupling mechanism thus mediates between the need for the head portion to be free after shearing and the need to prevent it from falling.
2Ease of operation
If the extended head portion is allowed to fall freely after shearing, then the ease of removal is improved, but the safety risk increases
Solution Approach 1:
The coupling mechanism is designed to be dynamic rather than static. It allows the sheared head portion to rotate freely around the main bolt portion while preventing longitudinal movement that would cause dropping. This dynamic design provides both safety (preventing drops) and ease of operation (allowing rotation and removal) simultaneously.
3Object-affected harmful factors
If a coupling mechanism is added to prevent dropping, then the safety is improved, but the device complexity increases
Solution Approach 1:
The coupling mechanism is segmented into distinct functional components: a coupling member that engages with the sheared head portion and a fastening device that secures the coupling member to the main bolt portion. This segmentation allows each component to perform its specific function efficiently while keeping the overall design relatively simple and manageable.
Data Source
AI summary
A safety shear bolt includes a main bolt portion and a torque head portion connected to the main bolt portion. The torque head portion includes an extended head portion, a stem portion rigidly connecting the main bolt portion to the torque head portion, and a coupling mechanism rotatably connecting the extended head portion to the main bolt portion. The stem portion is configured to shear when a predetermined torque is applied to the extended head portion, while the coupling mechanism prevents the extended head portion from dropping after shearing off from the main bolt portion.