AUTOMATIC BOTTOM THREAD CHANGING DEVICE OF COMPUTER EMBROIDERY MACHINE

摘要

An automatic bottom thread changing device of a computer embroidery machine can automatically change a shuttle peg of a bottom thread rotating shuttle in a mechanical mode to increase the production efficiency and automation degree of the computer embroidery machine and reduce the labor intensity of workers. A mounting plate (11) is fixedly arranged on a rack (1). One end of the mounting plate is close to a rotating shuttle box (2), and the other end of the mounting plate is fixedly provided with a shuttle peg bin (12). Two right-angle shape guide plates (4,10), which have the same shape and are opposite to each other, are arranged on the mounting plate. The outer side of the lower lateral surface of a horizontal section of the guide plate is provided with a sliding table (14). The upper part of the sliding table is provided with a rotary block (9) and a positioning rotary block (8). The upper end face (8-1) of the positioning rotary block is a semicircle surface. Two lateral surfaces (8-2) of the positioning rotary block are planes parallel to each other. The positioning rotary block contacts a limit track formed by the lower lateral surfaces of the horizontal sections of the two guide plates. An air cylinder (6) and a shuttle peg paw (5) are vertically arranged on the right lower part of the rotary block. The sliding table performs horizontal linear reciprocating motions with the help of a guide rod (15) and a belt (16) driving structure. Therefore, the shuttle peg paw can perform circular track motions between the rotating shuttle box and the shuttle peg bin to realize the bottom thread automatic changing.