Expansion Anchor Sleeve With Nested Element for Higher Load Adaptability

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Solution Overview

Problem

Existing expansion anchors face challenges in achieving high load values with minimal production and mounting complexity, while being adaptable to various load situations.

Innovation Solution

The expansion anchor design incorporates an additional expansion element on the expansion sleeve that can be radially widened independently, interacting with the anchor bolt's expansion region to enhance anchoring efficiency, allowing for better load distribution and adaptability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple expansion elements are added to improve load values and adaptability, then anchoring performance and versatility are improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to different load situationsVSAvoidproduction and mounting complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The additional expansion element is nested within the expansion sleeve, positioned on the inner side facing the anchor bolt. This nested configuration allows multiple expansion functions to be integrated in a compact arrangement, improving adaptability without proportionally increasing overall device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The expansion system is segmented into multiple independent expansion elements (the expansion sleeve and the additional expansion element), each with its own expansion region on the anchor bolt. This segmentation allows independent operation of each element to handle different load situations, while the modular design keeps production and mounting complexity manageable.

Inventive Principle:

Principle #1Segmentation

2Strength

If additional expansion elements are added to improve load values, then anchoring strength is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveload valuesVSAvoidproduction complexity

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The additional expansion element is manufactured as a nested component within the expansion sleeve structure. This nesting approach allows both elements to be produced and assembled in a streamlined manner, achieving enhanced load capacity without proportionally increasing manufacturing complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If the additional expansion element is positioned on the inner side of the expansion sleeve, then expansion coordination and anchoring reliability are improved, but the element is less accessible for mounting operations

Engineering Contradiction:

Improveanchoring reliabilityVSAvoidmounting accessibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The additional expansion element is nested on the inner side of the expansion sleeve, allowing it to be actuated by the anchor bolt's additional-expansion-element expansion region. This nested positioning ensures reliable coordinated expansion while the overall compact design maintains reasonable mounting accessibility.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 design achieves improved load values and simplified handling by coordinating the expansion processes of multiple elements, ensuring reliable anchoring in diverse load situations with reduced production and mounting complexity.

Implementation Method 1

the anchor bolt having an additional-expansion-element expansion region for radially displacing the additional expansion element

Methodology Applied

Scientific EffectRadial expansion: Deformation

Implementation Method 2

the anchor bolt having an expansion-sleeve expansion region for radially displacing the expansion sleeve

Methodology Applied

Scientific EffectRadial expansion: Deformation

Implementation Method 3

can in turn radially displace the radially more external region of the expansion sleeve and can press the expansion sleeve against the encompassing hole wall, in particular while forming an undercut

Methodology Applied

Scientific EffectCompression force: Compression

Data Source

PatentUS11852176B2Expansion anchor with additional expansion element

Publication Date: 2023.12.26 HILTI AG

AI summary

An expansion anchor includes an anchor bolt and an expansion sleeve which encompasses the anchor bolt. The anchor bolt has an expansion-sleeve expansion region and an expansion-element expansion region. The expansion sleeve has an expansion element which is disposed on the expansion sleeve. The expansion sleeve is radially displaceable by the expansion-sleeve expansion region and the expansion element is radially displaceable by the expansion-element expansion region. The expansion element is disposed on the expansion sleeve on a side of the expansion sleeve that radially faces the anchor bolt.