CN2384962Y

CN2384962Y - Inner bobbin of sewing machine

Info

Publication number: CN2384962Y
Application number: CN 98214292
Authority: CN
Inventors: 李崇仁
Original assignee: Yuanfeng Industry Co ltd
Current assignee: Yuanfeng Industry Co ltd
Priority date: 1998-06-08
Filing date: 1998-06-08
Publication date: 2000-06-28
Anticipated expiration: 2008-06-08

Abstract

The utility model relates to an inner bobbin of a sewing machine. An inner bobbin is arranged in an outer bobbin and the inner bobbin comprises an inner bobbin body and a metal bottom plate. The inner bobbin body comprises a containing groove used for being placed with a thread wheel and the bottom part of the containing groove is fixedly provided with the bottom plate. The inner bobbin body is provided with injection molding by polyacetal, carbon fiber filament and lubricating oil mixed with resin. Thus a shell body with proper hardness and smooth surface. The bottom plate is convexly provided with a positioning axle to limit the thread wheel. The noise generated by rotation and contact can be reduced.

Description

The interior shuttle of Sewing machines

The utility model relates to a kind of interior shuttle, particularly reference and a kind of interior shuttle that reduces the Sewing machines of noise of Sewing machines.

The commentaries on classics group for the national games of Sewing machines is to be supplying under thread, the effects such as take-up knotting of separated time and Hou, it is with on the interior shuttle device what one outer shuttle, when shuttle outside this when rotating at a high speed, should can be attached to running in this outer shuttle by interior shuttle, should have a storage tank in interior shuttle inside, can install for line wheel, with the sustainable supply tailor of rolling off the production line, should interior shuttle major part be to make with steel, utilize the higher characteristic of its hardness can be for a long time and the outer shuttle friction of steel, be not easy to produce wearing and tearing, and can increase the service life, but, because in being somebody's turn to do, outer shuttle all is to make with metal material, so when shuttle is attached to and turns round on the shuttle outside this in being somebody's turn to do, the metal high-speed friction takes place and produces high frequency noise in both contacts site easily, particularly the rotating speed of industrial sewing machines is higher, therefore the essential in use lubricating oil that regularly adds, very inconvenient, and it is higher with the interior shuttle cost that metal turning forms, quality is also unstable, in addition, the line wheel is made with materials such as acryl or plastic cement, still for reducing cost by general enterprise, this line wheel is brought together because of cooling easily in manufacturing process and is made out of roundness produce deviation, so when this line wheel put what should in outlet and when rotating in the storage tank of shuttle, be easy to generate beat and touch with the wall of this storage tank, have equally and understand the shortcoming that produces noise.

The purpose of this utility model provides a kind of simple structure and takes turns rotation reposefully with line at what, and reduces the interior shuttle of the Sewing machines of noise generation.

According to above purpose, the interior shuttle of Sewing machines of the present utility model, should interior shuttle be to be set in the outer shuttle, this Nei Suonei has a storage tank, this storage tank bottom can be for the inner set anisotropy glue magnetic attachment of outer shuttle, and the built-in line wheel that is provided with of this storage tank, the axle of this line wheel can be twined for filament, wherein, should comprise a shuttle body and a steel substrate in one by interior shuttle, the bottom of this base plate position this storage tank of what, should interior shuttle body be with a certain proportion of polyacetal resin (POLYACETAL), carbon fiber (CARBON FIBRES) and lubricating oil hybrid resin ejection formation, therefore can obtain smooth surface and the moderate housing of hardness, this base plate central authorities formation one locating shaft protruding upward, this locating shaft can make the spacing rotation of axle of line wheel, when shuttle in this rotates at a high speed, should between shuttle body and outer shuttle except the generation that can reduce noise, this line wheel limited rotation on locating shaft also can reduce the noise that interior shuttle and line are produced between taking turns.

The interior shuttle of Sewing machines of the present utility model, its advantage is as follows:

1. reduction noise: because should in the shuttle body be to obtain smooth surface, plastic casing that hardness is moderate through special treatment, so when should in shuttle when doing rotation on the shuttle outside, can improve and make with metal in the past and send easily than the shortcoming of the sound greatly.

2. low, the lightweight of cost: because should in the shuttle body mainly to form be polyacetal resin, carbon fiber and lubricating oil hybrid resin ejection formation, so its moulding is made easily and can be reduced cost, and have the advantage of light weight.

Be elaborated below by most preferred embodiment and accompanying drawing interior shuttle to Sewing machines of the present utility model, in the accompanying drawing:

Fig. 1 is the three-dimensional exploded view of the utility model preferred embodiment.

Fig. 2 is the schematic bottom view of shuttle in the utility model preferred embodiment.

Fig. 3 is the combination cross-sectional schematic of the preferable enforcement of the utility model.

Fig. 4 is the schematic top plan view of the preferable enforcement of the utility model.

As shown in Figure 1, 2, 3, the interior shuttle of Sewing machines of the present utility model, be that an interior shuttle 10 is installed in the outer shuttle 20, should have a storage tank 11 in the interior shuttle 10, these storage tank 11 bottoms can attract for outer shuttle 20 inner set anisotropy glue magnetic 21, in addition, these storage tank 11 built-in line wheels 30 that are provided with, the axle 31 of this line wheel 30 can be twined for filament, because the above-mentioned prior art that is configured to, so no longer describe in detail at this.For a change: shuttle 10 comprises an interior shuttle body 12 and a steel substrate 13 in this, this base plate 13 is bottoms of this storage tank 11 of a what, can attract for this anisotropy glue magnetic 21, should form a flange 121 on interior shuttle body 12 peripheries, but and the horizontal what should supporting on the shoulder 22 of outer shuttle 20 inwalls rotate with stable.Should interior shuttle body 12 be with a certain proportion of polyacetal resin (POLYACETAL), carbon fiber (CARBONFIBRES) and the emitted moulding of lubricating oil hybrid resin, can obtain the moderate housing of smooth surface and hardness, in the present embodiment, the polyacetal resin ratio of shuttle body 12 accounts for 78% to 80% in being somebody's turn to do, carbon fiber accounts for 18% to 20%, and lubricating oil accounts for 0.4% to 0.7%.These base plate 13 central formation one columniform locating shafts 131 protruding upward, this locating shaft 131 can be located in the axle 31 of this line wheel 30, make this line take turns 30 limited in rotation positions, the top of this base plate 13 again, the bottom surface is coated folder near peripheral region when the ejection formation by shuttle body 12 in this and establishes, and be concaved with most arc notch 132 on these base plate 13 peripheries, so that should in shuttle body 12 when ejection formation, can be full of these arc notch 132 of what in and 13 formation fasten effect to base plate, in case the sliding situation of spline produces, this base plate 13 can more stablely be installed on the bottom of shuttle body 12 in this.Cooperate shown in Figure 4, when industrial sewing machines during in start, should outer shuttle 20 be that place's what rotates the state of (RPM 1500～2000) at a high speed, because should in shuttle 10 be to be material with the resin material that contains carbon fiber, so its intensity is good and smooth surface and can steadily paste what and turn round on should outer shuttle 20, and can not produce the excessive sound, can reduce noise, the axle 31 of this line wheel 30 can be worn spacing by the locating shaft 131 of this base plate 13 again, make this line wheel 30 and the wall of storage tank 11 keep certain clearance I, do not touch the situation of sending sound and do not have, so, can reach the effect that reduces noise.

Claims

1. the interior shuttle of a Sewing machines, this Nei Suonei has a storage tank, and this storage tank has a bottom, and the built-in line wheel with axle that is provided with of this storage tank, it is characterized in that:

Should comprise a shuttle body and a steel substrate in one by interior shuttle, the bottom of this base plate position what storage tank, should in shuttle body be smooth surface housing by polyacetal resin, carbon fiber and lubricating oil hybrid resin material, these base plate central authorities are protruding upward and wear a locating shaft in the online axle of taking turns rotationally.

2. the interior shuttle of Sewing machines as claimed in claim 1 is characterized in that: the top of this base plate, bottom surface near peripheral region by should in the shuttle body coat folder and established.

3. shuttle in the Sewing machines as claimed in claim 1 is characterized in that: this base plate periphery is provided with most arc notch, and this interior shuttle body is filled in the arc notch and fastens this base plate.

4. the interior shuttle of Sewing machines as claimed in claim 1, it is characterized in that: the locating shaft of this base plate is cylindrical.