Externally convex cambered surface pulley capable of preventing jumping out of groove

Abstract

The invention discloses an externally convex cambered surface pulley capable of preventing jumping out of a groove. The externally convex cambered surface pulley comprises a pulley body, wherein a cambered surface bulge is arranged on the side wall of a pulley groove of the pulley body, the surface arc of the cambered surface bulge is an arc made with a connecting line between the edge end of a groove opening of the pulley groove and the edge end of an adjacent groove bottom as the chord, and the surface arc is tangent to a vertical coordinate line penetrating through the edge end of the groove bottom. The externally convex cambered surface pulley has the advantages that when a rope rotates around the pulley and the swinging rope is in contact with the cambered surface bulge, tangential component force for pulling the rope to the groove bottom is generated, so that the rope cannot easily jump out of the groove; and compared with a conventional mode of adding an accessory capable of preventing jumping out of the groove to a pulley groove opening, the structure is simple.

Description

Technical field: [0001] The invention relates to a pulley, in particular to a pulley with an anti-jumping convex arc surface. Background technique: [0002] Wire rope slipping generally means that part or all of the wire rope in the pulley slips from the rope groove of a pulley to one side of the pulley or between the wheel rim and the baffle. The steel wire rope will fall out of the groove, two conditions must be met: one is that the steel wire rope has slack, and the other is that the steel wire rope has broken away from the center of the rope groove and is near the wheel rim. [0003] After the wire rope is out of groove, it will cause: [0004] The wire rope is damaged, scrapped, and after de-grooving occurs, the wire rope will be stuck between the pulley and the side plate of the pulley chamber. Continuing to lift or drop the sling will inevitably lead to scratches and scratches on the wire rope; the pulley is crushed, and the wire rope carrying the heavy object has a...

AI Technical Summary

Problems solved by technology

Continuing to lift or drop the sling will inevitably lead to scratches and scratches on the wire rope; the pulley is crushed, and the wire rope carrying the heavy object has a large force. When the wire rope enters the side clearance of the pulley, it will give the pulley a large lateral force, which may It will damage the pulley; cause a major accident. After the wire rope is bracketed, it is not found and treated in time. If the wire rope breaks, it will lead to unimaginable machine damage and fatal accidents.

[0005] In actual use, the hoisting wire rope of the crane is easy to jump out of the side of the ordinary pulley when it swings and vibrates; the pulley is used as the winding and unwinding device of the limit wheel, and the rope is easy to jump out of the side of the ordinary pulley when it swings and vibrates

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