Utilizing embedded fastening devices

By introducing concentric edges and inclined surface structures into the fasteners, combined with splines and tool engagement surfaces, the problems of insufficient positioning and clamping force of fasteners when connecting parts that are difficult to access are solved, achieving efficient part connection and anti-loosening effect.

CN116771784BActive Publication Date: 2026-04-24GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GM GLOBAL TECHNOLOGY OPERATIONS LLC
Filing Date
2022-10-20
Publication Date
2026-04-24

AI Technical Summary

Technical Problem

Existing fasteners are difficult to position and retain loose nuts when connecting parts that are difficult to access on the back, and they are also difficult to generate sufficient clamping force to prevent the joint from loosening under low friction coefficient conditions.

Method used

A fastener is designed comprising a body, concentric edges, and inclined surfaces. The concentric edges are embedded in a second part to prevent lateral slippage, and the splines prevent rotation. A tool engagement surface is used to achieve a tightening operation.

Benefits of technology

It provides high clamping force and high shearing force, making it suitable for blind applications and ensuring that parts are securely connected and not easily loosened.

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    Figure CN116771784B_ABST
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Abstract

A fastener for connecting a first part and a second part includes a body including a first body portion, a second body portion, a flange disposed between the first body portion and the second body portion and extending radially outward from the body. A bore extends through the body in an axial direction and includes an inner surface having threads. A plurality of splines extend radially outward from the second body portion and are configured to prevent rotation when the second body portion is inserted into an opening in the first part. An opening at the second body portion leading to the bore defines a concentric edge and a ramp extending from the concentric edge.
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Citation Information

Patent Citations

  • Rivet stud bolt and panel joint structure of the same

    CN104832522A

  • Piercing standoff

    US8366364B2