Device with two upper openings and lower opening

Abstract

The invention discloses a device with two upper openings and a lower opening. The device is formed by connecting a rotary disk rotating guide rod mechanism and four connecting rod mechanisms in series. The rotary disk guide rod mechanism comprises a rotary disk which is provided with two sliding grooves, two sliders which can slide in the sliding grooves are arranged in the two sliding grooves respectively, the rotary disk rotates around the center thereof, the two sliders are respectively hinged with a guide rod, the guide rod rotates around a second center, and the rotary disk and the second center are fixed to a frame respectively. Each of the four connecting rod mechanisms comprises a crank hinged to the second center, the cranks are hinged to a connecting rod and a swinging rod sequentially, and the swinging rods are hinged to the frame. Starting from a high-speed angle of a loom, in order to adapt to high revolution speed of the existing air-jet loom of 900-1000rpm, cam mechanisms are replaced by the connecting rod mechanisms, and accordingly the requirement for weaving process is met while vibration sources such as a cam and a cam rotor is also eliminated and other parts of the air-jet loom are prevented from damage.

Description

technical field [0001] The invention belongs to the field of looms, and relates to a flat opening mechanism, in particular to a two-up and one-down opening device. Background technique [0002] The shedding mechanism of air-jet looms mostly uses cam shedding mechanism, and the cam shedding mechanism with high pair can well realize the technical requirements of heald frame movement, but it is not suitable for high speed. The cam is particularly sensitive to the precision of manufacturing and processing. The cam must be adapted to a high speed above 600 rpm, and the cam must be high-precision, and it is particularly difficult to manufacture a high-precision cam. Once the precision of the cam fails to meet the manufacturing precision and does not meet the requirements, destructive dynamic forces will be generated, especially the conjugate cam, which has become a major resistance to the development of the opening mechanism. [0003] There are some difficulties in the design of ...

AI Technical Summary

Problems solved by technology

The shedding mechanism completes the alternate lifting and lowering of the upper and lower warp yarns. In the past, the loom speed was only 100-200 rpm. After improving the manufacturing accuracy of the cam, the speed of the cam shedding mechanism is still limited to below 600 rpm.

Now the speed of air-jet loom is 900-1000 rpm, the loom speed is high, but the use of cam opening mechanism brings damage and impact force. The cam and cam rotor become the vibration source of the loom and the source of damage to various other parts.

Images