Spindle Fastening Alignment Using Reverse Nut Runner Rotation
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Solution Overview
Problem
The existing fastening methods using a spindle and nut runner shaft often result in improper fitting and detachment issues due to forward rotation, leading to inefficiencies in the fastening process.
Innovation Solution
A fastening method where the nut runner shaft is initially reversed rotated to press against a non-circular fitting portion on the spindle, then reversed rotated again to press the fastening component against the workpiece, ensuring proper fitting before forward rotation for secure fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the nut runner shaft performs forward rotation to fasten the fastening component, then the fastening component is secured to the workpiece, but the spindle and nut runner shaft may not be properly fitted before fastening begins
Solution Approach 1:
The patent applies preliminary action by performing reverse rotation before forward rotation to establish proper fitting. The nut runner shaft first rotates in reverse to press against the non-circular fitting portion and achieve accurate alignment, then transitions to forward rotation for fastening. This preliminary fitting action ensures the spindle and nut runner shaft are properly coupled before the fastening process begins, eliminating the risk of improper fastening due to misalignment.
2Strength
If the spindle and nut runner shaft are raised during forward rotation, then the fastening component is tightened, but detachment of the spindle may occur when they are fitted
Solution Approach 1:
The patent applies inversion by using reverse rotation instead of forward rotation for the pressing action. The nut runner shaft rotates in reverse to press against the non-circular fitting portion and secure the connection, then transitions to forward rotation for fastening. This inverted approach ensures that the pressing and fitting actions occur before any raising motion, preventing detachment during the fastening process.
3Productivity
If forward rotation is continued when the spindle and nut runner shaft are not fitted, then the fastening process can begin, but improper fastening occurs
Solution Approach 1:
The patent applies preliminary action by performing reverse rotation to achieve proper fitting before initiating forward rotation for fastening. The nut runner shaft first rotates in reverse to press against the non-circular fitting portion and establish accurate alignment, ensuring the spindle and nut runner shaft are properly coupled. Only after this preliminary fitting is complete does the system transition to forward rotation, guaranteeing both efficiency and precision in the fastening process.
Data Source
AI summary
A fastening method of a fastening component includes: an installation step of installing the fastening component to an upper end of a spindle; a first pressing step of raising a nut runner shaft while reversely rotating the nut runner shaft in a rotating direction opposite to a fastening direction to press the nut runner shaft against a non-circular fitting portion; a second pressing step of raising the nut runner shaft while reversely rotating the nut runner shaft in the rotating direction opposite to the fastening direction to press the fastening component against a workpiece; and a fastening step of rotating the nut runner shaft forward in the fastening direction after the nut runner shaft is fitted into the fitting portion of the spindle.