US 2026/0139705 A1Published application

Mechanical fastener

AssigneeNantong Lock Fastener Manufacturing Co., Ltd.

InventorYang LIU

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Abstract

A mechanical fastener including a rod and a head member at the head of the rod, with the rod with a dual-engagement section. A fastening sleeve is mounted around the rod. By applying an axial tensile force to the dual-engagement section and simultaneously axially compressing the fastening sleeve, the sleeve undergoes plastic deformation and is embedded into the locking groove, thereby achieving fixed connection between the two plate-like components. A tail pull shaft section is provided to control fracture in installation stage, resulting in a flat end. The dual-engagement section effectively distributes the installation stress, improving concentricity of the mechanical fastener and the two plate-like components and lifespan. The locking groove features a rounded contour, significantly enhancing fatigue resistance. The mechanical fastener balances installation reliability, ease of operation, and connection strength, making it suitable for various high-strength connection disclosures.

Claims20

Dependent claims

A mechanical fastener, configured for fixedly connecting two plate-like components, comprising:

a fastening component, the fastening component comprises a rod and a head part, the rod is configured to pass through the two plate-like components, the rod comprises a head-end connecting portion and a free-end connecting portion, the head part is fixed to the head-end connecting portion of the rod and configured to abut against a mounting surface of one of the plate-like components, wherein a dual-engagement section is disposed on the rod adjacent to the free-end connecting portion;
a fastening sleeve, which is sleeved onto the rod, the fastening sleeve is configured to abut against a mounting surface of another one of the two plate-like components;
wherein a locking groove is defined on an outer circumferential surface between the head-end connecting portion and the free-end connecting portion, and by applying an axial tensile force to the dual-engagement section while simultaneously axially pressing the fastening sleeve, the fastening sleeve undergoes plastic deformation and is embedded into the locking groove, thereby achieving a fixed connection between the two plate-like components.

Dependencies are inferred from the claim text.