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Front shaft sleeve assembly of lower shaft

A front axle sleeve and lower axle technology, which is applied to sewing machine components, textiles, papermaking, sewing equipment, etc., can solve problems such as oil leakage and achieve the effect of improving quality

Active Publication Date: 2013-07-03
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large centrifugal force generated by the rotation of the lower shaft, the oil attached to the lower shaft also generates outward centrifugal force, and the oil is thrown outward. Although an oil seal is installed, there is still oil leakage.

Method used

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  • Front shaft sleeve assembly of lower shaft
  • Front shaft sleeve assembly of lower shaft
  • Front shaft sleeve assembly of lower shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below with specific embodiment, see figure 1 -5:

[0023] A lower shaft front bushing assembly, comprising a lower shaft 10 and a bushing 20 set outside the lower shaft 10, the lower shaft 10 rotates in the bushing 20, the lower shaft body is axially provided with a blind hole, blind The hole is the rotary hook oil supply pipeline 30, and the outer surface of the lower shaft body located in the axle sleeve 20 is radially provided with a through hole 40 communicating with the rotary hook oil supply pipeline 30. On one side of the through hole 10, the rotary hook The outer surface of the lower shaft body at the end where the oil supply pipe 30 is located is provided with a groove 60 and a return groove 50 in sequence, and the return groove 50 guides the oil to the groove 60 when the lower shaft 10 rotates to form an inner circulation of the casing. The return groove 50 may be arranged in a spiral direction opposite to the r...

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PUM

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Abstract

The invention relates to the technical field of accessories of sewing machines, in particular to a front shaft sleeve assembly of a lower shaft. The front shaft sleeve assembly of the lower shaft comprises a lower shaft and a shaft sleeve sleeved outside the lower shaft, wherein the lower shaft rotates inside the shaft sleeve; a blind hole is axially formed in the lower shaft body; the blind hole is a rotating shuttle oil supply pipeline; a through hole communicated with the rotating shuttle oil supply pipeline is radially formed on the outer surface of the lower shaft body inside the shaft sleeve; a groove and a reflowing slot are sequentially formed on the outer surface of the lower shaft body on the end where the rotating shuttle oil supply pipeline is arranged and one side of the through hole; and the reflowing slot can guide oil to the groove when the lower shaft rotates. Through the reflowing slot with the screwing direction opposite to the rotating direction of the lower shaft, in the case of rotation of the lower shaft, oil adhered to the lower shaft can reflow into the groove to form circulation, so that a phenomenon of oil leakage from a clearance between the lower shaft and the shaft sleeve is avoided and the quality of a product is improved; therefore, the front shaft sleeve assembly of the lower shaft is applicable to a sewing machine.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machine accessories, in particular to a lower shaft front bushing assembly. Background technique: [0002] Conventionally, in the rotary hook portion of a sewing machine, lubricating oil is supplied to the mating portion of the rotary hook and the bobbin, so that the rotary hook rotates uniformly with respect to the bobbin. The rotary hook of the sewing machine is supplied with oil by the lower shaft front bushing assembly. The structure of the front bushing assembly of the lower shaft is: a bushing is set outside the lower shaft, the lower shaft rotates at high speed in the bushing, and an oil seal is arranged between the two ends of the bushing and the lower shaft, and the oil seal is used to prevent the Oil leaks from the lower shaft to the outside. Because the rotation of the lower shaft produces a larger centrifugal force, the oil attached to the lower shaft also produces an outward centrif...

Claims

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Application Information

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IPC IPC(8): D05B71/02
Inventor 李创祝书伟
Owner JACK SEWING MASCH CO LTD
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