CN110725078A - Rotating shuttle device of sewing machine - Google Patents
Rotating shuttle device of sewing machine Download PDFInfo
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- CN110725078A CN110725078A CN201911205161.3A CN201911205161A CN110725078A CN 110725078 A CN110725078 A CN 110725078A CN 201911205161 A CN201911205161 A CN 201911205161A CN 110725078 A CN110725078 A CN 110725078A
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- 238000009958 sewing Methods 0.000 title claims abstract description 55
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
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- Sewing Machines And Sewing (AREA)
Abstract
The application aims to provide a rotating shuttle device of a sewing machine, which mainly comprises an outer shuttle, an inner shuttle and the like. Wherein the outer shuttle has a shuttle point which moves up and down synchronously with a needle of the sewing machine and rotates integrally with a lower shaft of the sewing machine; a track groove is formed between the inner cavity wall of the outer shuttle and the outer peripheral surface of the inner shuttle; the inner cavity wall of the outer shuttle is provided with a limit groove which is arranged along the circumferential direction of the inner cavity wall; the peripheral surface of the inner shuttle is provided with a limiting bulge along the circumferential direction; more than two groove bodies are arranged on the peripheral surface of the limiting bulge along the circumferential direction of the limiting bulge, and the groove bodies are distributed along different positions of the limiting bulge. Compared with the prior art, the frequency of card line can be reduced.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to a rotating shuttle device of a sewing machine.
Background
A rotating shuttle device, which is an important component in a sewing machine, is generally composed of an outer shuttle rotatable about a horizontal rotation axis, an inner shuttle rotatably supported by the outer shuttle, a bobbin case mounted on the inner shuttle, and the like.
In the existing rotating shuttle device, the large rotating shuttle and the small rotating shuttle are generally divided according to the stroke of the thread take-up lever and the size of the rotating shuttle, in practical use, the large rotating shuttle can adopt thin thread and also can adopt thick thread, and the small rotating shuttle can only be applied to the thin thread generally, so the industrial sewing machine adopts the large rotating shuttle to perform sewing weaving, however, in the prior art, particularly a computer sewing machine with three times of the large rotating shuttle has the following defects when in use:
1. when sewing, especially when the fineness is thin, the sewing thread is often clamped in the rotating shuttle, for example, when the shuttle thread formed by the strands with the specification of 300D × 3 and the like and the thinner shuttle thread are used, the thread clamping frequency is higher.
2. After the bottom thread of the rotary shuttle peg is replaced, the thread clamping frequency is higher when the sewing machine starts, so that the sewing machine cannot rotate easily, and the sewing machine stops working.
Therefore, how to provide a rotating shuttle device, which avoids the wire jamming is a problem to be solved urgently in the application.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, the present invention provides a rotary shuttle device for a sewing machine, which can reduce the frequency of thread jamming.
In order to solve the above technical problems, the present invention provides a rotating shuttle device of a sewing machine, comprising: an outer shuttle and an inner shuttle, wherein the outer shuttle has a shuttle point which moves up and down synchronously with a needle of the sewing machine and rotates integrally with a lower shaft of the sewing machine; a track groove is formed between the inner cavity wall of the outer shuttle and the outer peripheral surface of the inner shuttle; the inner cavity wall of the outer shuttle is provided with a limit groove arranged along the circumferential direction of the inner cavity wall; the outer peripheral surface of the inner shuttle is provided with a limiting bulge along the circumferential direction;
the peripheral surface of the limiting bulge is provided with a groove body along the circumferential direction;
the groove body penetrates through the lower end face of the limiting bulge from the upper end face of the limiting bulge;
the number of the groove bodies is more than two, and the groove bodies are distributed along different positions of the limiting bulges.
Further preferably, the groove direction of the groove body and the axial direction of the inner shuttle form an included angle; the included angle is 30-60 degrees.
Further preferably, the included angle is 45 degrees.
Preferably, each groove body takes the center of the inner shuttle as a central point, the distance between the peripheral surface of the limiting protrusion and the central point is a radius, and the groove bodies are distributed equiangularly along the circumferential direction of the limiting protrusion, or equidistantly along the circumferential direction of the limiting protrusion, or distributed at increasing angles along the circumferential direction of the limiting protrusion.
Further preferably, the depth of the groove body is 0.6-1 mm; the width of the groove body is 1-3 mm; the axial section of the groove body is in a parallelogram or rectangle shape; the axial section of the groove body is in a parallelogram or rectangle shape;
further preferably, the radial cross-sectional shape of the groove body is any one of a rectangle, an arc and a hook.
Further preferably, the groove body is an arc groove.
Further preferably, the tank body includes: the first arc area, the second arc area that links to each other with first arc area. The first arc-shaped area and the second arc-shaped area are sequentially arranged along the rotating direction of the inner shuttle; the area of the first arc-shaped area is smaller than that of the second arc-shaped area; the curvature radius of the second arc-shaped area is gradually increased from one end connected with the first arc-shaped area to one end connected with the outer peripheral surface of the inner shuttle, and the curvature radius of the second arc-shaped area is unchanged.
Further preferably, a thread passing groove is formed in the circumferential direction of the outer circumferential surface of the inner shuttle; the inner shuttle is provided with a first half part and a second half part which are divided by taking the symmetrical axis of the thread passing groove as a dividing line; at least one of the first half part and the second half part is provided with the groove body; and the number of the groove bodies is any one of two, three, four, five and six.
Further preferably, the number of the grooves is six; the first half part is divided into a first area with the line passing groove and a second area connected with the first area by a normal line perpendicular to the symmetry axis; one groove body is positioned in the first area, four groove bodies are positioned in the second area, and the rest groove bodies are positioned in the second half part; and the second zone has a trough located in the area connected or adjacent to the second half; and a groove body is arranged in the second half part and is positioned on the normal line.
Further preferably, the radial cross-sectional shape of the groove body is any one or a combination of a rectangle, an arc and a hook.
Further preferably, the radial cross-sectional shape of the groove body located in the first zone is rectangular; the radial section of the groove body positioned in the second area is arc-shaped; the radial section of the groove body positioned on the second half part is in a hook shape; wherein the hook shape includes: the first arc-shaped area and the second arc-shaped area are connected with the first arc-shaped area; the first arc-shaped area and the second arc-shaped area are sequentially arranged along the rotating direction of the inner shuttle; the area of the first arc-shaped area is smaller than that of the second arc-shaped area; the width of the first arc-shaped area is gradually reduced towards the direction deviating from the second arc-shaped area along the circumferential direction of the limiting bulge.
Further preferably, the method further comprises the following steps: a positioning hook mutually matched with the inner shuttle; the positioning hook is provided with a wire guide hole, and the shape of the wire guide hole is a waist-shaped hole.
Compared with the prior art, the frequency of the card line can be reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: working principle diagram of the rotating shuttle device in the first embodiment of the invention;
FIG. 2: an exploded view of the rotating shuttle device in the first embodiment of the present invention;
FIG. 3: the structure of the inner shuttle in the first embodiment of the invention is shown schematically;
FIG. 4: the side structure of the inner shuttle in the second embodiment of the invention is shown schematically;
FIG. 5: a partial enlarged view shown in a in fig. 4;
FIG. 6: a top view of the inner shuttle in a third embodiment of the present invention;
FIG. 7: a schematic side structure of the inner shuttle in the third embodiment of the invention;
FIG. 8: a top view of the inner shuttle in a fourth embodiment of the present invention;
FIG. 9: a schematic side structure of an inner shuttle in a fourth embodiment of the invention;
FIG. 10: a bottom view of the inner shuttle in the fifth embodiment of the present invention;
FIG. 11: a top view of the inner shuttle in a sixth embodiment of the present invention;
FIG. 12: a schematic side structure of an inner shuttle in a sixth embodiment of the invention;
FIG. 13: a top view of the inner shuttle in the seventh embodiment of the present invention;
FIG. 14: a schematic side structure of an inner shuttle in a seventh embodiment of the invention;
FIG. 15: the structure schematic diagram of the positioning hook in the eighth embodiment of the invention;
description of reference numerals: the outer shuttle 1, the limiting groove 11, the shuttle tip 13, the inner shuttle 2, the limiting bulge 21, the groove body 22, the rotating shaft 23, the driving rod 3, the needle 4, the positioning hook 5, the kidney-shaped hole 51, the lower shaft 7 and the needle plate 8; a first arc-shaped region 221; a second arc-shaped area 222, a first area 201, a second area 202, a third area 203, a fourth area 204, a trough body 22b, a first arc-shaped area 22b1, a second arc-shaped area 22b2, a first arc-shaped area 22c1, a second arc-shaped area 22c2 and a wire passing groove 25.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Example one
As shown in fig. 1 to 3, a first embodiment of the present invention provides a rotating shuttle device of a sewing machine, including: an outer shuttle 21 and an inner shuttle 2 disposed in the outer shuttle 21. Wherein, the inner shuttle 2 is provided with a rotating shaft 23, and the inner shuttle 2 is rotatably arranged on the outer shuttle 21 through the rotating shaft 23; the outer shuttle 21 has a shuttle tip 13 which moves up and down synchronously with the needle 4 of the sewing machine and rotates integrally with the lower shaft 7 of the sewing machine; a track groove is formed between the inner cavity wall of the outer shuttle 21 and the outer peripheral surface of the inner shuttle 2; the inner cavity wall of the outer shuttle 21 is provided with a limit groove 11 opened along the circumferential direction. The peripheral surface of the inner shuttle 2 is provided with a limit bulge 21 along the circumferential direction; the peripheral surface of the limiting bulge 21 is provided with more than two groove bodies 22 along the circumferential direction, and each groove body 22 is distributed along different positions of the limiting bulge 21.
Further preferably, as shown in fig. 3, in order to improve the cutting efficiency of the groove 22 on the line, the groove 22 penetrates through the lower end surface of the limiting protrusion 21 from the upper end surface thereof.
In the prior art, when the shuttle point 13 rotates at a high speed, the line body of the shuttle line is easily brought into the track groove and wound on the rotating shaft 23 of the inner shuttle 2, thereby forming a state of line clamping, so that the sewing machine cannot rotate, and the production efficiency is reduced. In addition, when the sewing machine has a thread jamming phenomenon, defects are likely to occur on the surface of the fabric to be sewn due to factors such as thread breakage and re-sewing, thereby causing an increase in defective products.
According to the structure, due to the matching of the limiting protrusion 21 and the limiting groove 11, the shuttle tip 13 hooks the line body of the shuttle line (which can be a surface line or a bottom line) and then runs along the track groove, so that when the shuttle tip 13 rotates at a high speed (for example, 400 revolutions per minute after starting and 2000 to 2500 revolutions per minute during work), if the line body of the shuttle line (for example, the shuttle line after the first needle of the machine needle 4 is pricked into a fabric or the shuttle line on the inner shuttle 2) is brought into the track groove by the shuttle tip 13 and wound on the rotating shaft 23 of the inner shuttle 2, in the process of high-speed rotation, due to the effect of the groove body 22, the cutting effect is performed on the wound line body, and the cut line is thrown out of the track groove by the effect of centrifugal force, so that the frequency of line clamping can be reduced, the stable running of the sewing machine is ensured, and the production efficiency and the yield are improved. In addition, it should be noted that, when the rotating shuttle device in this embodiment is preferably applied to sewing a shuttle thread with a fineness of 300D × 3 or less or a high hairiness rate, the thread jamming phenomenon can be greatly avoided, and the thread jamming frequency is reduced, so as to improve the production efficiency and the yield.
Further preferably, the radial cross-sectional shape of the groove 22 in the present embodiment is preferably rectangular to facilitate the cutting of the bobbin thread by the groove 22.
For the purpose of illustrating the working principle of the present application, the present application takes a vertical rotating shuttle as an example to be described as follows, as shown in fig. 1 and 2:
when a needle 4 of the sewing machine is driven by a driving rod 3, a first needle of the needle 4 penetrates into a fabric and penetrates through a needle hole formed in a needle plate 8, and a rotating shuttle starts to rotate, particularly when the rotating shuttle reaches a high speed of 400 revolutions per minute, a shuttle tip 13 of an outer shuttle 21 is easy to bring a shuttle thread (upper thread) with a thread end on the needle 4 and/or a shuttle thread (bottom thread) with a thread end on an inner shuttle 2 into a track groove and wind the shuttle thread on a rotating shaft 23 of the inner shuttle 2, the shuttle thread brought into the track groove is rubbed with a limiting bulge 21, once the shuttle thread rotates to the position of a groove body 22, the shuttle thread is cut by the groove body 22, and the cut shuttle thread is thrown out of the rotating shuttle device, so that the phenomenon of blocking is avoided.
In addition, when the rotary shuttle is in a high-speed operation stage, particularly in a high speed of 2000 to 2500 rpm in work, the shuttle tip 13 of the outer shuttle 21 is easy to bring the shuttle thread on the needle 4 or the shuttle thread on the inner shuttle 2 into the track groove and bring the shuttle thread into the track groove, and after the shuttle thread is wound on the rotating shaft 23 of the inner shuttle 2, the shuttle thread is cut off by the groove body 22, so that the phenomenon of jamming is avoided.
In addition, in order to further avoid the phenomenon of thread jamming, a thread passing groove 25 is formed in the circumferential direction of the outer circumferential surface of the inner shuttle 2, and the rotating shuttle device further comprises: and the positioning hook 5 is fixed on a bottom plate of the sewing machine, wherein the needle plate 8 is fixedly connected with the bottom plate, and one side of the positioning hook 5 is provided with a bulge 53 which can be inserted into the thread passing groove 25, so that when the sewing machine is used, the circumferential rotation of the inner shuttle 2 is limited by the bulge 51, and the action track of thread hooking can be completed by matching with a rotating shuttle structure when the needle 4 moves up and down along with the driving rod 3.
Example two
The second embodiment of the present invention also provides a rotating shuttle device of a sewing machine, which is a further improvement of the above embodiment, and the improvement is that: as shown in fig. 4, the groove of the groove body 22 is arranged at an angle to the axial direction of the inner shuttle 2.
As can be seen from the above, the groove is arranged at an included angle with the axial direction of the inner shuttle 2, so that the bobbin thread wound on the rotating shaft 23 of the inner shuttle 2 is easy to fall into the groove body 22, thereby facilitating the subsequent cutting of the groove body 22.
Further preferably, the included angle is 30-60 degrees. According to experimental tests, when the included angle is within the range, the frequency of thread clamping is low, and the stable operation of the sewing machine is further guaranteed.
Preferably, as shown in fig. 5, the included angle is 45 degrees, and within the included angle, the bobbin thread can well fall into the groove body 22 no matter in which direction the bobbin thread is brought into the track groove and wound on the rotating shaft 23 of the inner shuttle 2, so as to facilitate the subsequent cutting.
Further preferably, the depth of the groove body 22 is 0.6 to 1mm, and the width of the groove body 22 is preferably 1 to 3 mm; so that the shuttle thread can be more easily brought into the groove body 22 and easily cut off when rotating through the depth, and simultaneously, the large vibration generated by the inner shuttle 2 when rotating can be avoided.
Further preferably, the axial cross-sectional shape of the groove 22 is a parallelogram. The normally moving bobbin thread is not easily brought into the groove 22 by the shape, and the bobbin thread wound by the rotation shaft 23 moves along the outer circumferential surface of the inner bobbin 2 after being subjected to a large traction force, slides into the groove 22, and is cut by the groove 22.
In detail, the ratio of the width to the length of the groove 22 is preferably 1: 5.
EXAMPLE III
The third embodiment of the present invention also provides a rotating shuttle device of a sewing machine, which is a further improvement of the above embodiment, and the improvement is that: the radial cross-sectional shape of the groove 22 is an arc shape, such as a groove 22b shown in fig. 6 and 7.
Therefore, the radial section of the groove body 22b is arc-shaped, so that the normally moving shuttle thread is not easily damaged by the groove body even after being absorbed in the groove body, and the sewing thread is easily broken after sewing the fabric.
In detail, the groove 22b is in arc transition connection with the outer circumferential surface of the inner shuttle 2.
Further preferably, as shown in fig. 6 and 7, the groove body 22b is mainly constituted by the first arc-shaped region 22b1, the second arc-shaped region 22b2 connected to the first arc-shaped region 22b1, and the like, and the radial sectional shape of the groove body 22 in the present embodiment is preferably an arc shape. Wherein the first arc-shaped region 22b1 and the second arc-shaped region 22b2 are arranged in sequence along the rotating direction of the inner shuttle (the C direction shown in fig. 6); the area of the first arcuate region 22b1 is less than the area of the second arcuate region 22b 2; the radius of curvature of the second arcuate region 22b2 gradually increases from the end connected to the first arcuate region 22b1 toward the end connected to the outer peripheral surface of the inner shuttle, and the radius of curvature of the first arcuate region 22b1 does not change. Therefore, the length of the groove body is prolonged through the structure, so that the shuttle thread is easy to slide into the first arc-shaped area 22b1, and the phenomenon that the part of the abnormal shuttle thread, namely the shuttle thread wound by the rotating shaft, is lost motion and falls off the groove body 22 is avoided. In addition, the force applied to the shuttle thread is gradually changed by the second arc-shaped area 22b2 and gradually becomes larger in the process of reaching the first arc-shaped area 22b1, so that the shuttle thread is easily cut in the second arc-shaped area 22b 1. In addition, since the radius of curvature of the second arc-shaped area 22b1 is smaller than or equal to the radius of curvature of the second arc-shaped area 22b2, even if the partial bobbin thread is wound by the rotating shaft, the partial bobbin thread can be easily rebounded in the second arc-shaped area 22b2 to return to the normal operation state.
Example four
The fourth embodiment of the present invention further provides a rotating shuttle device of a sewing machine, which is a further improvement of any of the above embodiments, and the improvement is that: as shown in fig. 8 and 9, the plurality of grooves 22 are distributed along different positions of the limiting protrusion 21.
According to the structure, when the plurality of groove bodies 22 are distributed on the limiting protrusions 21 at different positions, in the practical application process of the rotating shuttle device, especially after different thicknesses and types of shuttle lines are replaced, the groove bodies 22 at different positions cut the different thicknesses and the different types of shuttle lines, so that the rotating shuttle device can still play a role in reducing or avoiding the occurrence of jamming after the different thicknesses and the types of shuttle lines are replaced.
Further preferably, each groove 22 is equiangularly distributed along the circumferential direction of the stopper protrusion 21 with the center of the inner shuttle 2 as a center point and the distance between the outer circumferential surface of the stopper protrusion 21 and the center point as a radius.
Obviously, each slot 22 in the present application may be equally distributed along the circumferential direction of the limiting protrusion 21 according to actual requirements. Or the shuttle threads are distributed along the circumferential direction of the limiting bulge according to increasing angles, for example, the shuttle threads are distributed according to angle intervals of which the angle intervals are increased by multiples of 30 degrees, 60 degrees, 90 degrees and the like, so that the shuttle threads with different thicknesses can be cut, and the jamming phenomenon can be reduced or avoided to the maximum extent under the condition of reducing the number of the groove bodies 22. The multiple may be one, two, three, etc., or other multiples, and is not limited and described herein.
Further preferably, a thread passing groove 25 is formed in the circumferential direction of the outer circumferential surface of the inner shuttle 2; wherein, the inner shuttle 2 is provided with a first half part and a second half part which are divided by taking the symmetrical axis of the thread passing groove 25 as a dividing line A; the first half portion is provided with a plurality of grooves 22. Therefore, in the actual process, because the second half part is lighter than the first half part, the plurality of groove bodies 22 are arranged on the first half part, which is beneficial to reducing the weight of the first half part and plays a role of balancing the first half part and the second half part, so that the inner shuttle is not easy to deflect, the thread jamming frequency can be reduced, and the phenomenon of cutting off the normally running shuttle thread can be avoided.
As a preferable mode, the number of the grooves in this embodiment is preferably five, and experiments show that when the number of the grooves 22 is five, the effects of reducing or avoiding the occurrence of jamming and preventing the grooves 22 from blocking the normal lockstitching of the rotary shuttle device can be achieved.
In detail, as shown in fig. 8, the first half of the present embodiment is divided by a normal line B perpendicular to the symmetry axis into a first region 201 having a line-passing groove 25, a second region 202 connected to the first region 201; one trough body is positioned in the first area 201, four trough bodies are positioned in the second area 202, and the rest trough bodies are positioned in the second half part; wherein the second half is divided by a normal B and this axis a into a third region 203 and a fourth region 204.
In detail, in the present embodiment, an included angle between the groove 22 located in the first area 201 and the normal B is in a range of 30 to 45 degrees. The groove bodies 22 in the second area 202 are equiangularly distributed along the circumferential direction of the position-limiting protrusion 21 with the center of the inner shuttle 2 as a central point and the distance between the outer circumferential surface of the position-limiting protrusion 21 and the central point as a radius.
And, the second area has a trough body 22 located in the area connected or adjacent to the second half, in order to avoid the phenomenon of the line card appearing in the second area, because the trough body 22 is located on the same axis with line-passing groove 25 roughly, can play the role of balancing the inner shuttle at the same time, thus reduce or avoid the phenomenon of the dead card to the maximum extent.
EXAMPLE five
The fifth embodiment of the present invention also provides a rotary shuttle device of a sewing machine, which is a further improvement of the fourth embodiment, and the improvement is that: as shown in fig. 10, the rotary shuttle device further includes: a slot 22 open in the second half.
Experiments show that: in the retracting process of the needle 4, the second half part of the inner shuttle is in the idle stroke state, so that the phenomenon that the shuttle thread is blocked due to the shuttle thread wound on the rotating shaft is not easy to occur, and the second half part is provided with the groove body 22, so that the shuttle thread which is blocked in the area can be cut off.
In addition, a slot 22 is formed in the second half portion of the embodiment and is located on the normal line, so that the phenomenon of line jamming in the area can be avoided while balancing.
In detail, the number of the slots 22 in this embodiment may be single or multiple, and the specific number of the slots in this embodiment is not specifically limited or described.
In addition, the second half portion of the present embodiment is described by taking an example of preferably forming one groove 22, and an included angle between the groove 22 and the normal B ranges from-30 degrees to 30 degrees. When the thread is blocked in the area near the normal line B of the second half part, the shuttle thread can be cut off quickly through the groove body 22, and the phenomenon of blocking is avoided. Through set up the cell body in this region, be favorable to balancing first half and half weight of second for the difficult wobbling phenomenon that appears of interior shuttle sets up less cell body 22 in this region simultaneously and can avoid the phenomenon that the card line appears in second half.
EXAMPLE six
A sixth embodiment of the present invention further provides a rotary shuttle device of a sewing machine, which is substantially the same as any of the first embodiment described above, except that the radial cross-sectional shape of the slot body 22 in this embodiment is preferably hook-shaped, such as the slot body 22C shown in fig. 11 and 12, and the slot body 22C is mainly formed by a first arc-shaped area 22C1, a second arc-shaped area 22C2 connected to the first arc-shaped area 22C1, and the like, wherein the first arc-shaped area 22C1 and the second arc-shaped area 22C2 are sequentially arranged along the rotation direction of the inner shuttle (C direction shown in fig. 11); the area of the first arcuate region 22c1 is less than the area of the second arcuate region 22c 2; the width of the first arc-shaped region 22c1 gradually decreases in the circumferential direction of the stopper projection 21 toward the direction away from the second arc-shaped region 22c 2. When the inner shuttle (as shown in the rotation direction of the C direction in fig. 11, the shuttle thread moves in the opposite direction and the thread is jammed, the thread can easily enter the first arc-shaped area 221 through the arc surface in the second arc-shaped area 222, and then can be easily cut off under the action of the knife surface formed by the arc surface of the first arc-shaped area 221, and is not easy to slip out from the first arc-shaped area 221, so that the smooth operation of the rotating shuttle device can be better ensured.
EXAMPLE seven
A seventh embodiment of the present invention also provides a rotary shuttle device of a sewing machine, which is substantially the same as any of the above embodiments except that, as shown in fig. 13 and 14, the radial sectional shape of the groove body is a combination of any two or more of a rectangular shape, an arc shape and a hook shape.
In detail, the radial cross-sectional shapes of the grooves in the embodiment are preferably arc-shaped and hook-shaped; wherein, the groove body 22 with the radial section shape of rectangle or arc is positioned in the first area 201 and the second area 202; wherein, the groove directions of the groove bodies in the first zone 201 and the second zone 202 form an included angle with the axial direction of the inner shuttle, and the included angle is usually between 30 degrees and 60 degrees. The angle in this embodiment is preferably 45 deg., as can be seen in fig. 4. And, the groove body 22 having a radial sectional shape of a hook is located in the third region 203 and the fourth region 204, or at the boundary of the third region 203 and the second region 202.
Through the combination of the groove bodies with different radial cross-sectional shapes, the shuttle lines with different specifications and types can be cut in time after being clamped, so that the phenomenon of clamping is avoided, and in addition, the phenomenon of mistakenly cutting off the normally running shuttle lines can be avoided.
Example eight
An eighth embodiment of the present invention further provides a rotating shuttle device of a sewing machine, which is a further improvement of any one of the above embodiments, and the improvement is that: as shown in fig. 15, the positioning hook 5 has a wire guiding hole 521, and the shape of the wire guiding hole is a kidney-shaped hole.
Through setting up the shape with wire guide 521 to the waist shape hole, compare the shape of current wire guide for the circular port, can help promoting the removal stroke of shuttle line, the position of shuttle in the adjustment to be favorable to receiving of shuttle line and unwrapping wire, form the stitch after good when guaranteeing that the sewing line is to fabric sewing, avoid appearing the production of defects such as discontinuity.
In detail, the length of the positioning hole is 10mm and the width is 4.6mm in the present embodiment. Wherein, the positioning hook is composed of a positioning part 51 and a wire passing part 52 provided with a wire guide hole 521, and the distance between the center of the wire guide hole 521 and the positioning part 51 is 14.3 mm.
The above embodiments are merely to illustrate the technical solution of the present invention, not to limit the same, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it is intended to cover the appended claims.
Claims (10)
1. A rotating shuttle device of a sewing machine, comprising: an outer shuttle and an inner shuttle, wherein the outer shuttle has a shuttle point which moves up and down synchronously with a needle of the sewing machine and rotates integrally with a lower shaft of the sewing machine; a track groove is formed between the inner cavity wall of the outer shuttle and the outer peripheral surface of the inner shuttle; the inner cavity wall of the outer shuttle is provided with a limit groove arranged along the circumferential direction of the inner cavity wall; the outer peripheral surface of the inner shuttle is provided with a limiting bulge along the circumferential direction; it is characterized in that the preparation method is characterized in that,
the peripheral surface of the limiting bulge is provided with a groove body along the circumferential direction;
the groove body penetrates through the lower end face of the limiting bulge from the upper end face of the limiting bulge;
the number of the groove bodies is more than two, and the groove bodies are distributed along different positions of the limiting bulges.
2. The rotating shuttle device of sewing machine according to claim 1, wherein the groove direction of the groove body is arranged at an included angle with the axial direction of the inner shuttle; the included angle is 30-60 degrees.
3. The rotary shuttle device of a sewing machine of claim 2, wherein the included angle is 45 degrees.
4. The rotating shuttle device of sewing machine according to claim 1, wherein each slot body takes the center of the inner shuttle as a central point, the distance between the outer peripheral surface of the position-limiting protrusion and the central point is a radius, and the slots are distributed equiangularly in the circumferential direction of the position-limiting protrusion, or equidistantly in the circumferential direction of the position-limiting protrusion, or distributed at increasing angles in the circumferential direction of the position-limiting protrusion.
5. The rotating shuttle device of sewing machine according to claim 4, characterized in that the depth of the groove body is 0.6-1 mm; the width of the groove body is 1-3 mm; the axial section of the groove body is in a parallelogram or rectangle shape.
6. The rotary shuttle device of a sewing machine according to claim 1, wherein the slot comprises: the first arc area, the second arc area that links to each other with first arc area. The first arc-shaped area and the second arc-shaped area are sequentially arranged along the rotating direction of the inner shuttle; the area of the first arc-shaped area is smaller than that of the second arc-shaped area; the curvature radius of the second arc-shaped area is gradually increased from one end connected with the first arc-shaped area to one end connected with the outer peripheral surface of the inner shuttle, and the curvature radius of the second arc-shaped area is unchanged.
7. The rotating shuttle device of sewing machine according to any one of claims 1 to 6, wherein a thread passing groove is formed in the circumferential direction of the outer circumferential surface of the inner shuttle; the inner shuttle is provided with a first half part and a second half part which are divided by taking the symmetrical axis of the thread passing groove as a dividing line; at least one of the first half part and the second half part is provided with the groove body; and the number of the groove bodies is any one of two, three, four, five and six.
8. The rotary shuttle device of a sewing machine according to claim 7, wherein the number of the slots is six; the first half part is divided into a first area with the line passing groove and a second area connected with the first area by a normal line perpendicular to the symmetry axis; one groove body is positioned in the first area, four groove bodies are positioned in the second area, and the rest groove bodies are positioned in the second half part; and the second zone has a trough located in the area connected or adjacent to the second half; and a groove body is arranged in the second half part and is positioned on the normal line.
9. The rotary shuttle device of a sewing machine according to any one of claims 1 to 8, wherein the radial sectional shape of the groove body is any one or a combination of a rectangle, an arc and a hook.
10. The rotary shuttle device of a sewing machine according to claim 9, wherein the radial sectional shape of the groove body located at the first region is a rectangle; the radial section of the groove body positioned in the second area is arc-shaped; the radial section of the groove body positioned on the second half part is in a hook shape;
wherein the hook shape includes: the first arc-shaped area and the second arc-shaped area are connected with the first arc-shaped area; the first arc-shaped area and the second arc-shaped area are sequentially arranged along the rotating direction of the inner shuttle; the area of the first arc-shaped area is smaller than that of the second arc-shaped area; the width of the first arc-shaped area is gradually reduced towards the direction deviating from the second arc-shaped area along the circumferential direction of the limiting bulge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205161.3A CN110725078A (en) | 2019-11-29 | 2019-11-29 | Rotating shuttle device of sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911205161.3A CN110725078A (en) | 2019-11-29 | 2019-11-29 | Rotating shuttle device of sewing machine |
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| CN110725078A true CN110725078A (en) | 2020-01-24 |
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| CN201911205161.3A Pending CN110725078A (en) | 2019-11-29 | 2019-11-29 | Rotating shuttle device of sewing machine |
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| CN101130920A (en) * | 2006-08-17 | 2008-02-27 | 兄弟工业株式会社 | Full rotary hook |
| CN201648717U (en) * | 2010-04-01 | 2010-11-24 | 宁波市鄞州勇耀缝制机械有限公司 | Inner rotating shuttle with wide-scope neutral gear groove structure |
| CN206109697U (en) * | 2015-08-31 | 2017-04-19 | 兄弟工业株式会社 | Sewing machine |
| CN208430309U (en) * | 2018-07-09 | 2019-01-25 | 杰克缝纫机股份有限公司 | A kind of rotating shuttle structure of sewing machine |
| CN211848417U (en) * | 2019-11-29 | 2020-11-03 | 朱健 | Rotating shuttle device of sewing machine |
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- 2019-11-29 CN CN201911205161.3A patent/CN110725078A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130920A (en) * | 2006-08-17 | 2008-02-27 | 兄弟工业株式会社 | Full rotary hook |
| CN201648717U (en) * | 2010-04-01 | 2010-11-24 | 宁波市鄞州勇耀缝制机械有限公司 | Inner rotating shuttle with wide-scope neutral gear groove structure |
| CN206109697U (en) * | 2015-08-31 | 2017-04-19 | 兄弟工业株式会社 | Sewing machine |
| CN208430309U (en) * | 2018-07-09 | 2019-01-25 | 杰克缝纫机股份有限公司 | A kind of rotating shuttle structure of sewing machine |
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