Anti-Rotation Bolt Ring With Oblique Nut Slot Alignment
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Solution Overview
Problem
Existing anti-rotation devices for bolts are inadequate as they either restrict the range of nut immobilization or fail to maintain the ring's position during operation, leading to torque loss and inefficiency.
Innovation Solution
A bolt design featuring a threaded rod with longitudinal grooves and a nut with oblique slots, utilizing a ring that surrounds the rod and has lugs to fit into these grooves and slots, allowing for easy installation and precise torque measurement, with the oblique slots ensuring the ring remains in place during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pin is inserted into a transverse hole and positioned in longitudinal slots to prevent nut rotation, then the anti-rotation function is achieved, but the nut can only be held within a limited range of positions and one area must be clear for pin insertion
Solution Approach 1:
The anti-rotation device is segmented into a ring component with multiple lugs instead of a single pin. The ring can be positioned at different locations along the threaded rod, and each lug can engage with corresponding grooves and slots. This segmentation allows the device to adapt to different nut positions while maintaining the anti-rotation function.
Solution Approach 2:
The ring structure serves multiple functions: it prevents rotation, allows positioning at various locations along the threaded rod, and provides a clear area for insertion without requiring a specific transverse hole. The multiple lugs on the ring enable it to work with different groove and slot configurations, enhancing versatility.
2Reliability
If a ring is positioned between the extension of the nut and the threaded rod to prevent rotation, then the anti-rotation function is achieved, but the ring may not remain in position during operation
Solution Approach 1:
The slot in the nut is designed as an oblique slot rather than a straight transverse slot. This asymmetric orientation allows the lug to engage the slot at an angle that provides both anti-rotation capability and positional stability during operation, preventing the ring from dislodging while maintaining reliability.
Solution Approach 2:
The engagement mechanism transitions from a simple radial insertion (single dimension) to an oblique engagement involving both radial and axial components (multiple dimensions). The oblique slot allows the lug to engage at an angle, providing stability in the axial direction while maintaining anti-rotation in the radial direction.
3Reliability
If longitudinal slots are formed in the nut to accommodate the pin or ring, then the anti-rotation function is achieved, but the slots must be aligned with the transverse hole or groove for insertion
Solution Approach 1:
The oblique slot design allows for dynamic engagement during the screwing operation. As the nut is screwed onto the threaded rod, the oblique slot naturally guides the lug into proper alignment and engagement, eliminating the need for precise pre-alignment between slots and grooves. This reduces device complexity while maintaining reliable anti-rotation function.
Data Source
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AI summary
The invention relates to a bolt comprising: - a threaded rod (26) having at least one helical thread (34) and at least one longitudinal groove (40), - a nut (28) having a tapped hole configured to screw onto the threaded rod (26) and at least one oblique slot (42) having a first through end (42.1) and a second non-through end (42.2), said oblique slot (42) being inclined from the first end (42.1) to the second end (42.2) in the same direction as the helical thread (34) of the threaded rod (26), - an anti-rotation device (32) configured to prevent the nut (28) from rotating relative to the threaded rod (26) and comprising a ring (44) that surrounds at least one threaded rod (26) and that has at least one first lug (46) configured to fit into the groove longitudinal (40) of the threaded rod (26) and in the oblique slot (42) of the nut (28) in operation.