Expansion Anchor Cutting Projection Undercut Creation
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Solution Overview
Problem
The installation of undercut anchors is complex and costly due to the need for special tools, limiting their application to high-security or dynamic load scenarios where other anchors cannot be used.
Innovation Solution
An expansion anchor with a cutting projection on the expansion sleeve, non-rotatably connected to the anchor bolt, allows for the creation of an undercut in the borehole during anchoring, eliminating the need for additional tools and enabling high load values with simple, quick installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional undercut anchors are used to achieve high load values and reliable anchoring, then anchoring reliability is improved, but device complexity and installation cost increase due to requiring special tools like collar drills and undercut tools
Solution Approach 1:
The patent combines the anchoring function and undercut drilling function into a single integrated anchor system. The expansion anchor includes cutting projections that directly create the undercut during the anchoring process, eliminating the need for separate undercut drilling tools and accessories.
Solution Approach 2:
The anchor serves multiple functions: it provides anchoring through expansion while simultaneously creating the undercut through its cutting projections. This multi-functionality replaces the need for specialized single-function tools required by traditional undercut anchors.
2Strength
If traditional undercut anchors are used to ensure high load bearing capacity, then strength is improved, but installation time increases due to complex installation procedures
Solution Approach 1:
The anchoring process and undercut creation process are merged into a single operation. As the expansion anchor is installed and expanded, the cutting projections simultaneously create the undercut, eliminating the need for sequential operations required by traditional methods.
Solution Approach 2:
The anchor performs the undercut creation itself during its own installation process. The cutting projections are integrated into the anchor body, allowing it to self-create the necessary undercut without requiring external specialized tools or additional installation steps.
3Reliability
If special accessories and tools are used for installing undercut anchors to achieve reliable anchoring, then anchoring performance is improved, but cost per attachment point increases
Solution Approach 1:
The patent merges multiple functions into a single component that can be manufactured as one integrated part. The anchor body includes integrated cutting projections, eliminating the need to manufacture and supply separate undercut tools and accessories, thereby reducing overall system cost.
Solution Approach 2:
The single anchor component performs both anchoring and undercut creation functions, replacing multiple specialized tools. This reduces the bill of materials and simplifies supply chain requirements, leading to lower cost per attachment point.
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 method provides reliable anchoring with high load values while simplifying and reducing the cost of installation, making it suitable for a broader range of applications beyond high-security uses.
Implementation Method 1
the rotating expansion sleeve produces the undercut in the borehole
Data Source
Figure 1~3
AI summary
The invention relates to an anchor (1) that can be secured in a drilled hole (2), with an expansion sleeve (10) for anchoring onto a wall (3) of the drilled hole, and with an anchor bolt (20) that passes through the expansion sleeve and that has an expansion section (38) for widening the expansion sleeve, and it also has a stop (22) that limits axial movement of the expansion sleeve away from the expansion section. According to the invention, at least one rotary catch (24) is provided which non-rotatably couples the expansion sleeve to the anchor bolt, and the expansion sleeve has at least one cutting projection (14) for creating an undercut in the wall of the drilled hole.