Ultrahigh-speed embroidery machine head

Abstract

The invention relates to the technical field of embroidery machines, and particularly discloses an ultrahigh-speed embroidery machine head. The ultrahigh-speed embroidery machine head is characterized in that a case is provided with a left chamber and a right chamber, a dynamic balance cam, a presser foot cam and a take-up-lever cam are positioned in regions on the outer sides of the left chamber, the right chamber and a right cover plate, a spindle between the dynamic balance cam and the presser foot cam is rotationally movably connected with a partition plate, and the presser foot cam and the take-up-lever cam are rotationally movably connected with the right cover plate. The ultrahigh-speed embroidery machine head has the advantages that the dynamic balance cam, the presser foot cam and the take-up-lever cam are isolated in the three regions by the partition plate and the right cover plate, every two adjacent regions are connected with each other by the spindle and the case in a supported manner, and accordingly resonance effects due to centrifugal force generated by various components can be prevented; the dynamic balance cam is integrally formed by a balance block and an eccentric column, the eccentric column can drive needle bars to move via a needle bar driving connecting rod assembly, centrifugal force generated by the balance block is used for offsetting the centrifugal force generated by the other components, accordingly, vibration can be eliminated, and the spindle can rotate at the high speeds.

Description

technical field [0001] The invention relates to the technical field of embroidery machines, in particular to an ultra-high-speed embroidery machine head. Background technique [0002] The embroidery machine head in the prior art usually includes a needle bar cam, a presser foot cam and a thread take-up cam arranged coaxially. The needle bar cam, the presser foot cam and the thread take-up cam are eccentric cams. During the rotation of the main shaft, Due to the effect of inertia, it will inevitably cause the machine head to vibrate, which not only produces noise but also affects the life of the machine head and the embroidery thread breakage rate. Especially when the speed is higher, the vibration will become more obvious. The existing structure of the machine head Restricted the development of high-speed machines. [0003] The Chinese utility model patent with the notification number CN203834159U discloses a dynamic balancing device for the needle bar cam mechanism of a co...

AI Technical Summary

Problems solved by technology

Although this structure can offset part of the vibration caused by centrifugal force, the structure of the needle bar cam will inevitably change when the counterweight is added. In order to connect with the counterweight, the structure of the needle bar cam is more complicated, which undoubtedly increases the material cost and processing cost

At the same time, increasing the counterweight in the axial direction of the main shaft will inevitably increase the width of the original machine head casing, which will also lead to an increase in material costs

The above-mentioned mating structure will not only lead to an increase in cost, but because the counterweight and the needle bar cam are connected by bolts, the bolts may become loose under long-term high-speed rotation, which will break the internal balance. Therefore, regular maintenance of the counterweight is required In the maintenance process, the casing needs to be opened, and the maintenance process is complicated. At the same time, after adjusting the counterweight, it is necessary to re-adjust the centrifugal force of the head system. This kind of maintenance process is complicated and inefficient.

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