Bobbin fixing device

Abstract

The invention discloses a bobbin fixing device. The bobbin fixing device comprises a rotating shaft, a first expansion block, a guide block, expansion pieces, ring springs, a second expansion block and a tightening nut. One end of the rotating shaft is provided with a step surface, and the other end of the rotating shaft is provided with a threaded section. The tightening nut is screwed on the threaded section. Both the first expansion block and the second expansion block are of a hollow cone frustum with a conical surface. The first expansion block is sleeved on the rotating shaft, and one end of the first expansion block is abutted against the step surface of the rotating shaft. The second expansion block is sleeved on the rotating shaft, and one end of the second expansion block is abutted against the tightening nut. The guide block is arranged between the first expansion block and the second expansion block, and at least three grooves are formed in the guide block, wherein the grooves extend along the rotating shaft axially and are evenly distributed along the rotating shaft circumferentially. The expansion pieces are plate-like rectangular solids, at least three in number and respectively embedded in the grooves of the guide block in a sliding and matched mode, the bottom ends of two sides of each expansion piece are respectively abutted against the conical surfaces of the first expansion block and the second expansion block, through holes are formed in the expansion pieces, and the ring springs penetrate through the through holes to connect the expansion pieces together. By means of the bobbin fixing device, a bobbin does not slip in the process of backing-off, and the bobbin fixing device can be adapted to large bobbins with high speeds and inclination angles.

Description

technical field [0001] The invention relates to a yarn bobbin fixing device used on a creel in textile equipment such as a warping machine or a warp knitting machine, and belongs to the technical field of textiles. Background technique [0002] The yarn tube fixing device used in the existing warping machine or warp knitting machine and other textile equipment is mainly composed of a rotating shaft, a connecting seat and a swing arm. Yarn, the rotating shaft is rotatably mounted on the creel through a bearing, and a section of the outer peripheral surface of the rotating shaft is a tapered surface. When the warping machine or warp knitting machine is working, the yarn bobbin is sleeved on the rotating shaft, and the tapered surface section on the rotating shaft is placed in the inner hole of the yarn bobbin and tightly fits with the inner hole of the yarn bobbin, so as to ensure the yarn bobbin and the rotating shaft. When the yarn is unwinding by rotating at a low speed to...

AI Technical Summary

Problems solved by technology

However, the yarn bobbin fixing device of this structure also has the following two disadvantages during work. On the one hand, the device can only be used for unwinding small and light yarn bobbins. For large and heavy yarn bobbins, such as When polyester and nylon parent yarn bobbins are used for unwinding, due to the large size and weight of the bobbin, there is still a slippage phenomenon, and the slipping is easy to wear the inner diameter of the bobbin and reduce the service life of the bobbin. The yarn tension is not uniform due to the loss of roundness, and accidents such as yarn loosening and yarn breakage often occur, which greatly affect the quality of warp beams and fabrics; High-speed and inclined-angle bobbin fixation, poor applicability

Images