Tension spring and manufacturing method thereof

Abstract

The invention discloses a tension spring and a manufacturing method of the tension spring. The tension spring comprises a tension spring body formed by a steel wire which is curved and wound in a spiral mode and connecting pieces arranged at the two ends of the tension spring body respectively and used for being connected with externally connected objects. The two ends of the tension spring body are respectively a conical end portion which is connected with the tension spring body in an integrated mode and gradually shrinks and becomes smaller. Each connecting piece which can freely rotate is stably installed in the corresponding conical end portion. One end of each connecting piece is stably clamped in the corresponding conical end portion and the other end of each connecting piece is exposed outside the corresponding conical end portion. According to the tension spring, the connecting pieces can freely rotate, so that the connecting pieces are flexibly buckled with the external objects in a hung mode, and use is quite convenient. In addition, the two ends of the tension spring body are respectively one conical end portion which gradually shrinks and becomes smaller, so that the load capacity of the tension spring body is improved. Besides, at least two circles of steel wire abut against each clamping portion and the corresponding conical end portion and are arranged between each clamping portion and the corresponding conical end portion, so that each connecting piece is stably installed in the tension spring body, and therefore the stress between each connecting piece and the tension spring body is reduced. In this way, the service life of the tension spring is prolonged and the tension spring is safe to use.

Description

Technical field: [0001] The invention relates to the technical field of extension spring products, in particular to an extension spring with stable structure, strong load capacity and long service life and a manufacturing method thereof. Background technique: [0002] Tension springs are widely used in medical respiratory equipment, motion control, medical mobile equipment, hand tools, home care equipment, shock absorption, pump springs, mechanical and electronic protective hardware, fluid control valves, mechanical aerospace components, actuators, switchgear Machines and instruments are medium, and their materials are stainless steel, piano steel, high carbon steel, phosphor bronze, oil tempered alloy spring steel, etc. [0003] Existing tension springs generally include: a tension spring body formed by helically coiling a steel wire and hooks integrally connected to both ends of the tension spring body and used for connecting with an external object, wherein the coiled ste...

AI Technical Summary

Problems solved by technology

When in use, because the inner diameters of the circles surrounded by the coiled steel wires in the main body of the extension spring are uniform, the restorative force of the whole main body of the extension spring after being stretched is not ideal, so that the load capacity of the entire extension spring is not high; In addition, the main body of the extension spring and the hook are integrally connected and formed, and the end of the hook is only connected with the outermost circle of steel wires of the main body of the extension spring, resulting in a relatively concentrated stress on the part connected between the hook and the main body of the extension spring, making it Damaged or even broken due to excessive force, which has great potential safety hazards, and also reduces the service life of the extension spring

In addition, the hook and the main body of the extension spring are integrally fixed, and the position of the hook relative to the main body of the extension spring is fixed. When in use, it cannot be flexibly connected with foreign objects, which is very inconvenient to use

Images