The present invention discloses a
yarn strength tester, belonging to the technical field of
yarn testing, which includes a moving seat and a control panel fixedly installed on the front side of the moving seat near the right side. Through the mutual cooperation among components such as a reciprocating lead screw, a vertical plate, a
servo motor, a threaded sleeve A, a
square rod, an n-shaped plate, a
hydraulic cylinder A, a disc, a square block, a
yarn roller and a square groove, the yarn roller can be driven to move back and forth while paying off the yarn, thereby reducing the friction of the yarn on the yarn roller during yarn feeding, and at the same time reducing the torsional stress existing during unwinding, avoiding affecting subsequent yarn testing. In addition, through the mutual cooperation among components such as a
combing frame, a U-shaped plate, a flexible rod, a movable gear, a transmission gear, a rack plate A, a movable plate, a turntable, a swing rod, a movable rod, a driven
bevel gear and a driving
bevel gear, the yarn can be deflected back and forth for
combing during yarn unwinding and feeding, reducing the torsional force of the yarn.