45-degree oblique angle self-tapping anti-loosening thread for lightweight plastic component

Abstract

The invention discloses a 45-degree oblique angle self-tapping anti-loosening thread for a lightweight plastic component. The 45-degree oblique angle self-tapping anti-loosening thread comprises a screw rod body, a screw head is installed at one end of the screw rod body, a screw head lower supporting face is arranged on the lower surface of the screw head, and a 45-degree oblique angle broken line flank angle structural line is arranged at one side of the screw head lower supporting face; and a thread tooth back side angle structural line is arranged at the other side of the screw head lowersupporting face, a thread small-diameter structural line is arranged on the screw head lower supporting face, a tooth mountain is formed between the 45-degree oblique angle broken line flank angle structural line and the thread tooth back side angle structural line, a bisector is arranged in the middle of the tooth mountain, and a size area is arranged on the screw head lower supporting face. The45-degree oblique angle self-tapping anti-loosening thread has the advantages that fast tapping and locking are achieved, high static residual torque is kept, and the influence of different temperature alternating environments on failures of a fastening function and the loosening phenomenon is prevented.

Description

technical field [0001] The invention relates to the technical field of thread structures, in particular to a self-tapping and anti-loosening thread with an oblique angle of 45 degrees for lightweight plastic components. Background technique [0002] In the future automotive industry, new energy vehicles and low-emission fuel-extended range vehicles will gradually replace traditional natural exhaust passenger vehicles. Lightweight design has become an important key design concept in this field. As lightweight design materials such as various nylon PA66+30% glass fiber and other plastic components design replaces the design of metal materials such as steel, especially the interior and exterior of automobiles, air-cooled oil-cooled For system ECU, vision system and other occasions, the self-tapping thread of the national standard triangular thread is used for fastening with screws. Due to the large angle of the thread tooth ridge, the tooth peak is not sharp, resulting in exces...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a self-tapping and anti-loosening thread with a 45-degree oblique angle for lightweight plastic components, so as to solve the problem that the internationally designed self-tapping and self-locking thread for plastics proposed in the background technology has low-torque penetration performance, but The anti-loosening ability is poor, and the thread parameters and forming parameters are more complicated, which is not suitable for the promotion and application of market generalization.

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