Drawing frame shaft housing

Abstract

The invention relates to a drawing frame shaft housing which comprises a mandrel, a bearing outer ring and a bearing inner ring, wherein two roller paths and steel balls positioned and separated by a retaining frame are arranged between the inner ring and the outer ring, the inner ring is hollow, and the mandrel is fixedly connected with the inner ring through connecting bolts by a hollow part of the inner ring together. The drawing frame shaft housing is characterized by also comprising a tapered connecting piece, a mandrel head has a short taper structure, the tapered connecting piece is matched with the short taper part of the mandrel, the inner ring is provided with a step surface extending out of the inner ring, the tapered connecting piece is tightly matched on the extending step surface of the inner ring, outer sides of the steel balls are respectively provided with rubber sealing rings; and one of the connecting bolts used for connecting two ends of the mandrel and the inner ring adopts left-hand threads. The mandrel head has the short taper structure which is connected by the tapered connecting piece so as to avoid direct contact of the mandrel head and the outer ring, therefore, the invention has high structure strength, no friction heating of the mandrel head and the outer ring, reasonable structure, long service life and good sealing property, is convenient for oiling and maintaining, prolongs the service life, and is suitable for a high-speed drawing frame and a low-speed drawing frame.

Description

technical field [0001] The invention relates to an accessory of a textile machine, in particular to a shaft sleeve of a biscuit machine, which belongs to the technical field of textile machines. Background technique [0002] The shaft sleeve is an accessory widely used in textile machinery, especially the cake machine, combing machine and other machinery. When the cake machine pulls the yarn, the shaft sleeve is the key component that determines the draft and traction quality of the yarn. , the thickness uniformity of the sliver depends on its quality, therefore, there are high requirements for the reasonable structure, manufacturing quality and sealing performance of the shaft sleeve. The shaft sleeves currently used are generally conventional needle roller bearings without an inner ring, that is, the needle roller bearings are directly installed between the mandrel and the outer ring, but the conventional needle roller bearings without an inner ring have the following defe...

AI Technical Summary

Problems solved by technology

The shaft sleeves currently used are generally conventional needle roller bearings without an inner ring, that is, the needle roller bearings are directly installed between the mandrel and the outer ring, but the conventional needle roller bearings without an inner ring have the following defects: It is hot and hot; easy to leak oil, the internal grease overflows, pollutes the rubber roller sliver, causes the needle roller bearing to wear due to oil loss, and then wears the mandrel, affecting the quality of the sliver, etc., so it is barely suitable for low-speed cake machine

However, the design of the above-mentioned double raceway bearing still has unreasonable points: 1. The extension of the mandrel is slender and easy to deform and bend; It is easy to produce contact, easy to produce friction and heat; 3. The sealing between the shaft head and the shell is poor, and there is a gap where flying flowers can easily enter, thereby increasing frictional resistance, further aggravating bearing wear, and reducing the life of the shaft sleeve; 4. Adding Lubricating oil is inconvenient, and the bushing must be removed regularly for maintenance, which affects production

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