Thread Bolt Locking Helix for Fast Blind-Hole Assembly
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Solution Overview
Problem
The challenge lies in efficiently connecting two components using thread bolts in difficult-to-access positions, where alignment and insertion of the thread bolt into passage holes is time-consuming and prone to errors.
Innovation Solution
An assembly locking device with a cylindrical helix comprising holding, transition, and blocking turns is designed to securely retain the thread bolt within a passage hole, ensuring loss-proof and pull-out-proof positioning, utilizing geometric data from standardized threads to determine wire diameter and inner diameter for reliable frictional fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional thread bolts are used to connect components in difficult-to-access positions, then the connection can be established, but the alignment and insertion process is time-consuming and prone to errors
Solution Approach 1:
The assembly locking device is pre-assembled onto the thread bolt before insertion, with the locking mechanism already in place. This preliminary preparation eliminates the need for complex alignment operations during assembly, as the locking device guides and secures the bolt in one action.
Solution Approach 2:
The assembly locking device is designed to be mounted on the thread shaft of the thread bolt, with the locking mechanism nested within the helical structure. This compact nested design allows the entire assembly to pass through passage holes without requiring separate alignment of multiple components.
2Reliability
If passage holes are aligned for thread bolt insertion, then connection can be made, but the process requires high time expenditure and is error-prone
Solution Approach 1:
The assembly locking device with its helical structure and blocking turns automatically performs the alignment and securing function. When the thread bolt with the pre-mounted locking device is inserted, the locking mechanism self-aligns and locks into place without requiring external alignment operations or additional fastening steps.
Solution Approach 2:
The invention merges the thread bolt function with the locking mechanism into a single integrated assembly. The assembly locking device is mounted directly on the thread shaft, combining the fastening and locking functions into one component that is inserted and secured in a single operation.
3Stability of the object's composition
If a locking mechanism is added to prevent thread bolt loosening, then connection stability improves, but device complexity increases
Solution Approach 1:
The assembly locking device utilizes a spring-like helical structure made from a flexible wire that can be wound into multiple turns. This flexible helical structure provides the locking function through its elastic deformation and geometric configuration, achieving stable connection without complex rigid mechanisms or multiple separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the connection process by ensuring the thread bolt is securely retained in the passage hole, reducing assembly time and errors, while maintaining the thread bolt's functionality and preventing extraction.
Implementation Method 1
at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis between an insertion position and a blocking position
Implementation Method 2
utilizing geometric data from standardized threads to determine wire diameter and inner diameter for reliable frictional fastening
Data Source
AI summary
An assembly locking device adapted to a normalized standard or fine thread of a thread shaft of a thread bolt, so that the locking device is positionable in a loss-proof manner on the thread of the thread shaft. The locking device includes: a cylindrical turn comprised of a plurality of helically wound turns, of a wire, a transition turn and adjacent to the second end of the helix is a blocking turn which has a negative pitch PB compared to the holding turn, so that at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis between an insertion position and a blocking position. The end portion of the blocking turn forms the second end of the helix and in the blocking position is arranged radially outwardly of the transition turn and/or the holding turn.