Sewing machine and stabbing mechanism

Abstract

The invention discloses a sewing machine and a stabbing mechanism. The stabbing mechanism includes a main shaft and a stabbing assembly, and the stabbing assembly includes a stabbing crank fixed on the main shaft, a stabbing link with a first end pivotally connected to the stabbing crank, and a needle pivotally connected to the second end of the stabbing link. The rod assembly also includes a balance assembly, the balance assembly includes: a balance crank fixed to the main shaft, the balance crank and the thorn crank are respectively arranged on both sides of the main shaft and arranged in line; the first end is pivotally connected to the balance crank; The balance weight is pivotally connected to the second end of the balance link, and the movement direction of the balance weight and the needle bar assembly relative to the main shaft is opposite. During the rotation of the main shaft, the movement directions of the balance crank, the balance connecting rod, and the balance weight are roughly symmetrical to the movement directions of the stabbing crank, the stabbing connecting rod, and the needle bar assembly respectively, and the balance assembly can balance at least part of the movement of the stabbing assembly. The inertial force and the moment of inertia relative to the main shaft greatly reduce the vibration of the stabbing mechanism.

Description

technical field [0001] The invention relates to the technical field of sewing equipment, in particular to a sewing machine and a stabbing mechanism. Background technique [0002] The stabbing mechanism of sewing machinery mostly adopts crank slider mechanism, such as figure 1 As shown, during the rotation of the main shaft, the thruster assembly will generate unbalanced inertial force, the mechanism vibrates greatly, and the direction of the unbalanced inertial force and moment is irregular. A three-dimensional model of the stabbing mechanism is established, and the vibration analysis is carried out using ADAMS. figure 2 shown. Based on the above problems, most of the sewing machines have large vibration and noise, short service life of parts, and are prone to damage. [0003] Therefore, how to provide a stabbing mechanism with less vibration is a technical problem to be solved by those skilled in the art. Contents of the invention [0004] In view of this, the object ...

AI Technical Summary

Problems solved by technology

Based on the above problems, most of the sewing machines have large vibration and noise, short life of parts and easy damage

Images