High-speed jacquard shedding device and jacquard machine provided with same

Abstract

The invention discloses a high-speed jacquard shedding device, belonging to the technical field of shedding of a jacquard machine. An inner jacquard knife mechanism and an outer jacquard knife mechanism alternately move up and down by transmission of motion between each of swing mechanisms and a main transmission shaft; the main transmission shaft is synchronously equipped with four sets of eccentric wheel and connecting rod mechanisms for driving the swing mechanisms; each set of eccentric wheel and connecting rod mechanisms comprise an equal-eccentricity symmetrical connected eccentric wheel and two connecting rods; the swing mechanisms with swing arm shafts are arranged above the same lateral ends of the inner jacquard knife mechanism and the outer jacquard knife mechanism; the swing arm shafts are formed by extending in parallel along a left main wall plate and a right main wall plate; the swing arm shafts are equipped with fixed swing arms connected with ends in the same directions of an inner jacquard knife frame and an outer jacquard knife frame through lifting rods, movable swing arms, and connecting rod swing arms for driving the swing arm shafts at the two ends of the main wall plates; and the connecting rod swing arms and the movable swing arms of the swing mechanisms are connected with one connecting rod and another connecting rod in one corresponding set of eccentric wheel and connecting rod mechanism respectively. Due to the adoption of the scheme, the inner jacquard knife mechanism and the outer jacquard knife mechanism are high in motion synchronization precision and clear for shedding. The invention further provides a jacquard machine provided with such device.

Description

【Technical field】 [0001] The invention relates to a jacquard shedding device, which is used for high-speed jacquard weaving and belongs to the technical field of jacquard machine shedding. 【Background technique】 [0002] The crank rocker, that is, the opening technology principle of the connecting rod is the general selection principle of the jacquard opening mechanism, and the eccentric wheel principle structure is a deformation design of the crank. [0003] The notification number is the jacquard machine girdle transmission device of CN101831743B (see figure 1 ) uses eight independent eccentric wheels to be placed on both sides of the left and right wall panels. Among them, four large eccentric wheels 02 (one on the outside of the left wallboard 04 and one inside the right wallboard 05 are not visible) jointly drive the four rear hinge connecting rods 08 of the lifting knife group 06 and the knife lifting group 07 to move up and down alternately, so as to The rear openin...

AI Technical Summary

Problems solved by technology

And when at the maximum opening position, the front swing arm 10 and the rear swing arm 11 are all in the swing maximum limit angle position, that is, the large and small eccentric wheels 02, 03 are all in the maximum eccentricity output position, and at this time, even if each eccentric wheel is in The manual installation angle error on the main transmission shaft 01 is very large, because the swing angle displacement generated by the front and rear swing arms 10, 11 is small (even invisible to the naked eye), so that the installation angle error of each eccentric wheel is difficult to be detected, according to This directly causes the large eccentric wheel 02 or the small eccentric wheel 03 to be unable to drive synchronously to realize the up and down alternate movement of the knife lifters 06 and 07 with a relative 180° time difference. Make the heald eye hanging on the heddle of the hook for lifting the warp thread to produce a jump that is not conducive to weaving

At the same time, due to the asynchrony of the eight connecting rod groups driven by the eight eccentric wheels, the main drive shaft 01 and the whole machine will cause greater vibration

The adverse effects directly caused by the above problems are that the upper and lower openings of the device are not synchronized during the weaving process, the opening is not clear, the warp yarn breakage rate is high, and the weaving efficiency is low.

[0006] 2. The main transmission shaft 01 of the device is located on the upper part of the machine frame and the left and right wall panels, resulting in a high center of gravity of the main power source driving the main transmission shaft 01, and the vibration of the whole machine is relatively large, which will make the opening state of the device unstable. At the same time increase the wearing parts

[0007] 3. A wall panel is arranged on the left and right sides of the device, so that the main transmission shaft located outside the two wall panels bears a relatively large cantilever moment, and each force-bearing member on the shaft is also in a cantilever state, so the motion transmission is unstable, and the wall The board is a steel plate, so the wall board has poor vibration absorption performance, the frame rigidity is insufficient, and the load bearings installed on the wall board bear a large load, which is the main vulnerable part, thus affecting the life of the whole machine

[0008] In view of the above analysis, the structure of the existing jacquard knife lifting device needs to be improved urgently

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