Threaded Spindle Structure for Durable Compact Riveting Tools
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Solution Overview
Problem
Existing riveting devices face component durability issues, particularly in the region of the threaded spindle's front end, where a higher component load occurs during operation.
Innovation Solution
The riveting device incorporates a threaded spindle with a through hole design, where the front longitudinal section has a smaller cross-sectional surface area than the back longitudinal section, counteracting component weakening and improving durability. The spring element is integrated within the threaded spindle, reducing overall length and enhancing compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring element is installed into the threaded spindle from the front end side, then the spring element can be accommodated inside the threaded spindle, but the front end region of the threaded spindle has a lower wall thickness and experiences higher component load, reducing component durability
Solution Approach 1:
The threaded spindle is divided into two distinct regions: a first region with a through hole for spring element installation and a second region with higher wall thickness for load-bearing operations. This segmentation allows the spring element to be installed without compromising the structural strength of the front end region.
Solution Approach 2:
Different regions of the threaded spindle are given different wall thicknesses according to their functional requirements. The first region has sufficient wall thickness for spring element accommodation, while the second region has increased wall thickness to handle higher component loads during riveting operations, optimizing both integration and durability.
2Device complexity
If the threaded spindle has a through hole for spring element installation, then the spring element can be integrated, but the front end region has lower wall thickness which weakens the component
Solution Approach 1:
The threaded spindle is segmented into functional zones: a first region with a through hole for reliable spring element installation and a second region with enhanced wall thickness for maintaining component reliability under load.
Solution Approach 2:
The wall thickness is locally optimized in different regions - the first region has appropriate wall thickness for spring element integration, while the second region features increased wall thickness to ensure component reliability during high-load riveting operations.
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 enhances the component durability of the riveting device by reducing component weakening in critical areas and allowing for a more compact construction, thereby improving the tool's operational reliability and efficiency.
Implementation Method 1
The riveting device has a spring element, the force of which is used to press clamping jaws of a chuck housing against a rivet mandrel, received therein
Data Source
AI summary
A riveting device has a riveting tool actuated by a drive. A mandrel holder can be moved relative to a mouthpiece along an operative axis. A spring element exerts a force into the mandrel holder. The drive has a threaded spindle with a front end facing towards the mandrel holder and an opposing back end. The spindle has a through hole which extends in the direction of its longitudinal extension. A back longitudinal section extends up to the back end of the threaded spindle. A front longitudinal section present before the back longitudinal section. A fixing structure created by a material recess non-displaceably connects the threaded spindle to the mandrel holder. The front longitudinal section of the through hole has a cross-sectional surface area which is smaller than the cross-sectional surface area of the back longitudinal section. The spring element is arranged in the back longitudinal section.