Weft yarn cutting device for rapier loom

Abstract

The invention discloses a weft yarn cutting device for a rapier loom. The weft yarn cutting device comprises a base, a first guide wire, a second guide wire, a yarn compression reed and a motor, wherein a guide wire fixing arm cavity is formed on the rear side of the right end of the base; the first and second guide wires have first and second guide wire cavities; a first guide wire fixing arm isarranged at the left end of the first guide wire; a second guide wire fixing arm is arranged at the left end of the second guide wire; a disc blade is positioned between the first and second guide wires; the left end of the yarn compression reed is fixed with the base, and the right end is a free end and protrudes out of the end surface of the base and extends to the disc blade; a yarn compressionreed slot is formed at the right end of the yarn compression reed; the weft yarn cutting device is characterized by also comprising a disc blade transition connection mechanism which is positioned between the second guide wire and the motor; the disc blade transition connection mechanism, together with the first and second guide wire fixing arms, is fixed with the base; a transmission connectionrelation is established between the disc blade and the motor on the disc blade transition connection mechanism. Since the radial force on the motor shaft is reduced, the service life of the motor is guaranteed; the rotary-cut adaptability to the weft yarns different in material and count is strong; the structure is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of looms, and in particular relates to a weft yarn cutting device for a rapier loom. Background technique [0002] The aforementioned weft yarn cutting device is customarily called "weft cutting device". The rapier loom is a shuttleless loom that uses a reciprocating sword-like rod (ie rapier) to fork or clamp the weft yarn and introduce the weft yarn into the fell. Because the rapier loom is characterized by weft supply outside the machine, the weft yarn is actively controlled by the rapier head, and the weft insertion quality is high, and because the rapier loom has a fast weaving speed, a high degree of automation, and a positive weft insertion method, it has a strong adaptability to the variety. It can meet the weft insertion requirements of various yarns, and it also has obvious advantages in multi-color weaving that other looms cannot match. It is the most popular textile machinery in the industry at...

AI Technical Summary

Problems solved by technology

[0006] Furthermore, as mentioned in the industry, due to the limitation of the structure of the rapier loom, no matter what method is used, the motor that drives the blade can only choose a micro high-speed motor, and the force of the motor shaft of the micro high-speed motor is relatively fragile and usually cannot withstand large radial force

When it is necessary to cut special yarns such as coarse count yarn, knot yarn, chenille yarn, rope yarn, etc., because the yarn is thick and hard, the blade will be subjected to a large radial force, so if If the disc blade is directly set on the motor shaft of the motor as taught by the aforementioned CN207619605U, then the aforementioned larger radial force will all be transmitted to the motor shaft, causing damage to the motor and / or shortening the service life of the motor

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