Automatic return type tensioner

By designing an automatic return-type tensioning device, and utilizing the cooperation between the conical column and the inner conical surface of the fixed sleeve, the problem of deflection and tilting of the arc plate in the existing technology is solved, and stable tensioning of the inner hole surface of the workpiece to be welded is achieved, thereby improving the welding quality.

CN224359613UActive Publication Date: 2026-06-16GUIZHOU AEROSPACE KAIXING INTELLIGENT TRANSMISSION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUIZHOU AEROSPACE KAIXING INTELLIGENT TRANSMISSION CO LTD
Filing Date
2025-06-25
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In the prior art, the horizontal expansion rod and the horizontal expansion arc plate are prone to deflection and tilting around the axis of the horizontal expansion rod during radial movement, which makes it impossible to effectively expand and support the inner wall surfaces of the two sections of the cylinder to be welded.

Method used

An automatic return-type tensioning device is adopted, including a circular plate, a fixed sleeve, a steel ball, an arc-shaped push plate, and a screw. The arc-shaped expansion block moves smoothly between the two circular plates by cooperating with the inner conical surface of the fixed sleeve through the conical column. The arc-shaped push plate pushes the arc-shaped expansion block to move radially outward and tighten it on the inner hole surface of the workpiece to be welded.

Benefits of technology

This effectively avoids the deflection and tilting of the arc-shaped expansion block, ensuring stable tensioning of the tensioning device on the inner surface of the workpiece to be welded, and improving welding quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224359613U_ABST
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Abstract

The utility model relates to welding tool technical field especially relates to a kind of automatic return type's tensioner, comprising: circular plate, two pieces of circular plate left and right opposite interval arrangement;Fixed sleeve, its both ends are respectively inserted in the central hole of two pieces of circular plate and are welded fixed;Steel ball, setting in the radial hole of fixed sleeve;Arc push plate, multiple arc push plates annularly distribute at the outer circumferential surface position of fixed sleeve middle part;A circle of tension spring is commonly sleeved on the outer arc surface of all arc push plates;The inner end of arc push plate is abutted on steel ball;Arc expansion block, in the end of every arc push plate away from fixed sleeve connection has a piece of arc expansion block;And the left and right two sides of arc expansion block are respectively with the inner side surface of circular plate sliding fit;Screw rod, insert in the inner hole of fixed sleeve, taper column is set in the middle segment of screw rod;Steel ball is abutted on the outer taper surface of taper column;The left end of screw rod is screwed with nut after from fixed sleeve stretch out.
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