Split Anchor With Self-Disengaging Screw Drive Mechanism
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Solution Overview
Problem
Existing expansion anchors require external tools or mechanisms for expansion, such as torque wrenches or motorized drivers, to spread the expansion tongues, which can be inconvenient and inefficient.
Innovation Solution
An expansible anchor design featuring an expansion body that can be retracted or rotated within an expansion sleeve, utilizing a screw drive mechanism to generate longitudinal or rotational movement for expansion, and a release device to disengage the tool automatically upon completion, eliminating the need for external tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an expansion anchor uses an expansion body that can be retracted into an expansion sleeve for expansion, then the expansion anchor requires external tools or mechanisms (such as torque wrenches or motorized drivers) to spread the expansion tongues, but this makes the operation inconvenient and inefficient
Solution Approach 1:
The expansion anchor is designed with a self-expanding mechanism where the expansion body, when rotated, automatically generates the force to spread the expansion tongues through the screw drive mechanism. The system serves itself by converting rotational movement into longitudinal expansion force without requiring external torque wrenches or motorized drivers, thereby improving ease of operation while maintaining manageable device complexity
Solution Approach 2:
The patent replaces the need for complex external mechanical tools (torque wrenches, motorized drivers) with an integrated screw drive mechanism that converts simple rotational movement into expansion force. This substitution simplifies the overall system by eliminating the need for separate external mechanical expansion devices
2Productivity
If the expansion anchor requires external tools to expand the expansion tongues, then the expansion process can be controlled, but it requires additional tools and increases the time for installation
Solution Approach 1:
The patent merges the expansion function and the driving mechanism into a single integrated system. The expansion body with screw drive threads combines the expansion action and the driving action into one component, eliminating the need for separate external tools and reducing installation time, thereby improving productivity without sacrificing expansion control
Solution Approach 2:
The expansion body is pre-configured with screw drive threads that automatically engage with the expansion sleeve during rotation. This preliminary configuration ensures that as soon as rotational movement is applied, the expansion mechanism is immediately activated, eliminating delays associated with separate tool applications and improving overall installation speed
3Reliability
If the expansion anchor uses a tool seat for applying a tool to generate rotational movement, then the tool can be attached securely, but the tool must be manually disengaged after expansion
Solution Approach 1:
The release device is designed to automatically disengage the tool from the tool seat once the expansion is complete. The system monitors the expansion state and self-activates the release mechanism, eliminating the need for manual tool disengagement and improving ease of operation while maintaining reliable tool attachment during the expansion process
Solution Approach 2:
The release device incorporates a feedback mechanism that detects when the expansion has reached completion. This feedback triggers the automatic disengagement of the tool from the tool seat, ensuring reliable operation throughout the expansion process while simplifying the post-expansion procedure by eliminating manual intervention
4Manufacturing precision
If the expansion anchor uses a screw drive to convert rotational movement into longitudinal movement for expansion, then the expansion can be controlled precisely, but the mechanism becomes more complex
Solution Approach 1:
The screw drive mechanism serves multiple functions: it converts rotational movement to longitudinal expansion force, provides controlled expansion through thread pitch, and integrates the driving and expanding actions into a single mechanism. This multi-functionality achieves precise manufacturing control without proportionally increasing device complexity, as the same components perform multiple critical functions
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
The anchor expands autonomously, ensuring secure anchoring without the need for additional tools, and disengages the tool seamlessly, enhancing ease of use and efficiency in the expansion process.
Implementation Method 1
the screw drive converts a rotating drive movement of the tool seat into the longitudinal movement of the expansion body in relation to the expansion anchor for expanding the expansion anchor
Data Source
Figure 1
AI summary
The expansion anchor (1) has an expansion sleeve (4) axially displaceable on a threaded shaft (3) that is arranged with an expansion portion (2). An internally threaded sleeve (8) is screwed with an internal hexagon portion (12) and provided remote from the expansion sleeve. The expansion sleeve is expanded for anchoring in a hole drilled to a base anchor. The threaded shaft is made to enter into the internal hexagon portion and to press a hex key to terminate the expansion of expansion sleeve.