Traction wheel with small wrap angle and large friction

Abstract

The invention discloses a traction wheel with a small wrap angle and large friction. The traction wheel structurally comprises rope grooves, bayonets, an inner steel ring, steel pillars and an outer steel ring, wherein the inner diameter of the outer steel ring is larger than the outer diameter of the inner steel ring; the outer steel ring and the inner steel ring are connected and fixed togetherthrough the more than two steel pillars; the two centrally symmetrical bayonets are arranged on the inner steel ring; the bayonets and the inner steel ring are of a mould integration structure; and the more than two rope grooves are parallelly arranged outside the outer steel ring. According to the traction wheel with the small wrap angle and the large friction provided by the invention, through the joint matching of groove body structures, steel wire ropes and natural elastic clamping mechanisms, after the steel wire ropes are embedded into the rope grooves, outlets are small, so that the steel wire ropes are not easy to separate from the rope grooves; the steel wire ropes and the groove body structures rub against each other, so that the friction force is large enough even if the wrap angle is small; meanwhile, through the natural elastic clamping mechanisms, elastic strips can be bent to touch the steel wire ropes no matter how large the diameters of the steel wire ropes are, so that the steel wire ropes and triangular wedge-shaped ports rub against each other, and the traction force is improved; and thirdly, the wear of the steel wire ropes is less, and the service life of thesteel wire ropes is prolonged.

Description

technical field [0001] The invention relates to the field of elevator machine room equipment, in particular to a traction sheave with small wrap angle and high friction. Background technique [0002] The traction sheave is used to hang the wire rope, and the two ends of the rope are respectively connected with the bridge box and the counterweight device. The traction wrap angle refers to the radian angle at which the wire rope passes through the rope groove. The larger the wrap angle, the greater the friction force. The greater the traction force, but at present, the wrap angle of the semicircular rope groove must be increased to improve the traction force. However, in the semicircular rope groove with cutouts, the steel wire rope is embedded in the cutout, and the friction force increases at the same time, and the steel wire rope is easy to slip out of the rope groove. In the end, the wedge-shaped groove can only be used on light-load elevators due to relatively large wear ...

AI Technical Summary

Problems solved by technology

[0002] The traction sheave is used to hang the wire rope, and the two ends of the rope are respectively connected with the bridge box and the counterweight device. The traction wrap angle refers to the radian angle at which the wire rope passes through the rope groove. The larger the wrap angle, the greater the friction force. The greater the traction force, but at present, the wrap angle of the semicircular rope groove must be increased to improve the traction force. However, in the semicircular rope groove with cutouts, the steel wire rope is embedded in the cutout, and the friction force increases at the same time, and the steel wire rope is easy to slip out of the rope groove. In the end, the wedge-shaped groove can only be used on light-load elevators due to relatively large wear, so a traction sheave with a small wrap angle and high friction force that is not easy to slip out of the rope groove is required

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