A linear weft insertion mechanism of a rapier loom

Abstract

The invention discloses a linear weft insertion mechanism for a rapier loom. The linear weft insertion mechanism comprises a supporting seat, a gripper head, a rapier and a rodless cylinder, wherein the rodless cylinder is used for driving the rapier to move horizontally through a magnetic slide block device; the two ends of the rodless cylinder are fixed on the supporting seat respectively through a supporting plate and a positioning block; a bearing is fixed on the supporting plate; the rapier horizontally passes through the bearing to realize vertical limitation, and slides horizontally; a hydraulic buffer device is arranged between the supporting plate and the positioning block; a collision head of the hydraulic buffer device is arranged towards the slide block; the slide block device is fixed at one end where the gripper head is not positioned of the rapier. The linear weft insertion mechanism has the advantages and positive effects that a complex mechanical transmission mechanism in the conventional loom is eliminated, and the production and manufacturing costs are reduced while a weft insertion function is satisfied. By adopting a linear bearing, mechanical wear of parts of the weft insertion mechanism during working is almost zero, and the service life is prolonged greatly.

Description

technical field [0001] The invention belongs to the technical field of looms, in particular to a linear weft insertion mechanism of a rapier loom. Background technique [0002] In the prior art, the weft insertion process of the rapier loom consists of two rapier heads that move relatively reciprocating linearly along the reed width direction of the loom, and start to move from both sides of the loom to the center of the shed of the loom to transfer the weft yarn. Then return to the starting position on both sides, so as to complete a weft insertion. Among them, the sword head is driven by the sword belt, and the sword belt is driven by meshing the teeth on the sword belt with the tooth holes on the sword belt, or the end of the smooth sword belt is fixed on the sword belt, and is driven by the sword belt. The key of the weft insertion mechanism of the rapier loom is that the uniform rotational motion of the main shaft is converted into the swinging motion of the sword whee...

AI Technical Summary

Problems solved by technology

Among them, the first three weft insertion mechanisms are too large in size, have many transmission links, a large number of parts, high production cost, and difficult installation and debugging. Take the conjugate cam as an example, its structure is complex, the material requirements are high, and the machining accuracy of the cam contour The requirements are quite high (the profile error is required to be less than 0.01mm), and the manufacturing is very difficult. If there is an error, there will be an impact

Many domestic rapier loom products adopt this weft insertion method, but due to insufficient precision, they cannot run at high speed for a long time

After wear and tear, the performance of the mechanism will decrease obviously, and the impact and vibration will increase, which will affect the normal weaving

In the weft insertion mechanism combined with the helical rotary pair and the connecting rod, the manufacturing precision of the variable pitch screw is high, the material requirements are also high, the process is difficult, the manufacturing cost is very high, and the transmission efficiency of the thread pair is low. Lead screw processing requirements are also higher

The acceleration of the variable helical weft insertion mechanism can only be zero when the rapier is full-width weaving. For different weaving width requirements, the screw cannot be used universally.

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