Screw Connection Arrangement With Conical Sleeve For Precise Alignment
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Solution Overview
Problem
Conventional screw connections with screws and nuts face challenges in achieving precise alignment and strong, play-free fits, especially under harsh conditions where dirt can reduce the inner diameter of fastening openings, leading to misalignment and reduced connection strength.
Innovation Solution
A screw connection arrangement featuring a sleeve with a radially projecting collar and a conically tapering first longitudinal section that expands radially when a bolt is tightened, allowing for precise alignment and a play-free, form-fitting connection in both axial and transverse directions, combined with a sleeve nut for additional bracing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional screws and nuts are used with oversized fastening openings for easy insertion, then ease of operation is improved, but manufacturing precision and connection accuracy deteriorate due to play and misalignment
Solution Approach 1:
The connection system is divided into three components: a sleeve inserted into fastening openings, a bolt with conical section, and a nut. The sleeve acts as an intermediary element that separates the insertion function from the centering function, allowing easy insertion while achieving precise alignment through the conical bolt-sleeve interaction
Solution Approach 2:
The sleeve serves as an intermediary component between the bolt and the fastening openings. It receives the conical bolt section and transmits the centering force to the fastening openings, mediating between the oversized opening geometry and the precise alignment requirement
2Reliability
If fastening openings are oversized to accommodate dirt and harsh conditions, then reliability under harsh conditions is improved, but manufacturing precision deteriorates due to increased play and misalignment
Solution Approach 1:
The conical bolt section performs preliminary centering action during insertion, compensating for the oversized opening geometry before the final tightening occurs. This preliminary alignment action ensures accurate positioning even when openings are enlarged for harsh condition reliability
Solution Approach 2:
The conical geometry of the bolt section changes the dimensional parameters during insertion, transitioning from a larger insertion diameter to a precise final positioning diameter, thereby achieving both ease of insertion and high alignment accuracy
3Manufacturing precision
If a form-fitting connection is achieved without play in the transverse direction, then manufacturing precision is improved, but ease of operation worsens due to difficult insertion
Solution Approach 1:
The connection transitions from a dynamic insertion phase with clearance to a static locked phase without play. The conical bolt section enables dynamic insertion with clearance, then transforms to create a static form-fitting connection without play through radial expansion of the sleeve
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 enables easy handling and achieves a more precise, strong screw connection by allowing the sleeve to expand radially, eliminating initial insertion play and providing both form-fitting and frictional connections, enhancing axial and transverse strength compared to conventional screw connections.
Implementation Method 1
the first longitudinal sleeve section being expandable through longitudinal slots and having an inner diameter tapering conically starting from the first sleeve end... the first longitudinal bolt section extending in the direction of the second End of bolt tapered
Implementation Method 2
a lateral surface of the first longitudinal sleeve section that is interrupted by the longitudinal slots can be widened to such an extent that at least sections of it rest against an inner circumference of the fastening openings of the first part and the second part
Data Source
AI summary
The invention relates to a screw connection arrangement comprising a sleeve (3) and a pin (4). Said sleeve (3) comprises, on a first sleeve end, a radially protruding collar (5) and a first sleeve longitudinal section (6) which starts from the first sleeve end, the first sleeve longitudinal section (6) can be widened by longitudinal slots (7) and has a conically tapering inner diameter starting from the first sleeve end. The pin (4) comprising a first pin longitudinal section (12) is inserted into the sleeve longitudinal section (6) The pin (4) comprises, on a second end, a second pin longitudinal section (13) having a thread and protruding out, at least partially, from the sleeve (3), the first pin longitudinal section (12) conically tapering in the direction of the second end of the pin (4).