Multi-Thread Tolerance Compensation Sleeve for Compact Fastening
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Solution Overview
Problem
Existing tolerance compensation devices are complex, expensive, and large due to the need for robust metal threads to withstand high forces and torques, making them costly and difficult to manufacture, and they often require large dimensions to accommodate these forces.
Innovation Solution
The device features multiple threads (at least two pairs) for the screw connection between the sleeves, allowing force distribution across multiple threads, enabling the use of less expensive materials like thermoplastic and reducing the need for large dimensions, with optional features like sawtooth threads and a friction element for enhanced stability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If robust metal threads are used to withstand high forces and torques, then the device can handle higher forces, but the device becomes complex, expensive, and large
Solution Approach 1:
The single robust thread is segmented into multiple threads (at least two) on the sleeves. This segmentation distributes the mechanical load across multiple thread engagements, reducing the stress on each individual thread. Consequently, the threads can be smaller and less robust, enabling the use of simpler materials like thermoplastics instead of metal, thereby reducing manufacturing complexity and cost while maintaining overall strength
Solution Approach 2:
The invention enables the use of composite or thermoplastic materials for the sleeves instead of solid metal. By combining multiple threads with these lighter materials, the device achieves sufficient strength through the cumulative effect of multiple thread engagements, while the material choice simplifies manufacturing and reduces device size
2Strength
If robust metal threads are used to withstand high forces and torques, then the device can handle higher forces, but the device dimensions increase
Solution Approach 1:
The load-bearing function is segmented across multiple threads, allowing each thread to be smaller in dimension. The cumulative strength of multiple smaller threads equals or exceeds that of a single large thread, enabling compact sleeve designs that fit within smaller device envelopes while maintaining high force withstanding capability
3Strength
If a single robust thread is used, then the thread can withstand high forces, but the manufacturing cost increases
Solution Approach 1:
The single high-strength thread design is replaced by multiple standard-strength threads. This segmentation allows the use of conventional, easily manufactured thread forms that can be produced through standard molding or machining processes, significantly reducing tooling costs and manufacturing complexity while the multi-thread configuration maintains overall structural strength
Solution Approach 2:
The invention enables the use of cheaper thermoplastic materials for the sleeves instead of expensive metal. The multiple thread design compensates for the lower individual thread strength, making economical materials viable while reducing overall device cost
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 results in a compact, cost-effective, and stable device that can withstand higher forces, allowing production from various materials, including thermoplastics, while maintaining a secure screw connection and preventing accidental unscrewing.
Implementation Method 1
a friction element arranged in the passage of the second sleeve bears against the screw at least in sections
Data Source
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AI summary
A device for fixing to a component, in particular a tolerance compensation element, comprising a first sleeve (1) and a second sleeve (2) that can be fixed to or in the first sleeve (1) by means of a screw connection, wherein the first sleeve (1) and the second sleeve (2) each have a passage (6, 7), wherein a screw can be screwed through the passages (6, 7) and through the component into a thread of a holding element, wherein a friction element (8) arranged in the passage (7) of the second sleeve (2) bears against the screw at least partially, and wherein the direction of rotation of the screw connection differs from the direction of rotation of the thread of the holding element, is characterized in that the first sleeve (1) and the second sleeve (2) each have at least two threads (3, 4, 5) for mutual engagement of the sleeves (1, 2), namely for realizing the screw connection.