CN210368225U - Curved needle adjusting device of chain type sewing machine - Google Patents
Curved needle adjusting device of chain type sewing machine Download PDFInfo
- Publication number
- CN210368225U CN210368225U CN201920966198.7U CN201920966198U CN210368225U CN 210368225 U CN210368225 U CN 210368225U CN 201920966198 U CN201920966198 U CN 201920966198U CN 210368225 U CN210368225 U CN 210368225U
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- needle
- looper
- curved needle
- eccentric sleeve
- adjusting device
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- 238000009958 sewing Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001815 facial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a looper adjusting device of chain sewing machine, it can adjust the height of looper in order to adapt to the wire loop of different shapes, including eedle, looper axle, looper and adjustment mechanism, adjustment mechanism includes eccentric cover, and eccentric cover locates on the looper axle and can rotate relative to the looper axle, and the looper is installed on eccentric cover through the looper seat, and the distance of the major external diameter portion of eccentric cover and the axial lead of looper axle is greater than the distance of the minor external diameter portion and the axial lead of looper axle; when the curved needle adjusting device is in a first use state, when the curved needle tip is positioned right above the needle hole, the part with the larger outer diameter is positioned on the upper side of the curved needle shaft, and a first height difference is formed between the curved needle tip and the needle hole; in a second use state, when the curved needle point is positioned right above the needle hole, the part with smaller outer diameter is positioned on the upper side of the curved needle shaft, a second height difference is formed between the curved needle point and the needle hole, and the first height difference is larger than the second height difference.
Description
Technical Field
The utility model belongs to the sewing machine field, concretely relates to chain sewing machine's looper adjusting device.
Background
The stitches made by the chain type sewing machine are chain type, and are commonly found on the lower hem of the upper garment and the like. The sewing principle of the chain type sewing machine is as follows: the upper thread passes through the thread hole of the needle, the needle is driven to reciprocate up and down to pass through or penetrate out of the cloth, a thread loop of the upper thread is formed when the needle moves upwards, and at the moment, the needle point of the curved needle is inserted into the thread loop to adjust the size of the thread to be required. However, due to the influence of factors such as the thickness, material, thickness, density and material of the upper thread, the shape of the thread loop formed by the needle moving upward is not uniform, so that the height of the looper needs to be adjusted correspondingly, otherwise, the problem that the needle point of the looper cannot be inserted into the thread loop occurs.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects and problems existing in the prior art, and providing a looper adjusting device of a chain type sewing machine, which can adjust the height of a looper to adapt to wire loops of different shapes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a looper adjusting device of a chain type sewing machine comprises a needle capable of reciprocating up and down, a looper shaft driven by a power mechanism to rotate and a looper driven by the looper shaft to rotate, the needle is provided with a needle hole for the upper thread to pass through, the curved needle is provided with a curved needle tip which is used for being inserted into a thread ring formed by the upper thread passed through by the needle, the curved needle adjusting device also comprises an adjusting mechanism used for adjusting the height difference between the curved needle point and the needle hole of the machine needle, the adjusting mechanism comprises an eccentric sleeve which is sleeved on the curved needle shaft and can rotate relative to the curved needle shaft, the curved needle is arranged on the eccentric sleeve through a curved needle seat, the eccentric sleeve is provided with a part with larger outer diameter and a part with smaller outer diameter, the distance between the part with the larger outer diameter and the axis of the looper shaft is larger than the distance between the part with the smaller outer diameter and the axis of the looper shaft; the curved needle adjusting device has at least two using states, in the first using state, when the curved needle point is positioned right above the needle hole, the part with the larger outer diameter is positioned on the upper side of the curved needle shaft, and a first height difference is formed between the curved needle point and the needle hole; in a second using state, when the needle bending point is positioned right above the needle hole, the smaller outer diameter part is positioned on the upper side of the needle bending shaft, a second height difference is formed between the needle bending point and the needle hole, and the first height difference is larger than the second height difference.
Preferably, the curved needle seat is sleeved on the eccentric sleeve and allows the eccentric sleeve to rotate relative to the eccentric sleeve.
More preferably, the adjusting mechanism further comprises a locking member for locking the curved needle seat and/or the eccentric sleeve to prevent the curved needle seat and the eccentric sleeve from rotating relative to the curved needle shaft.
Further, the curved needle seat has relative both ends, the both ends of curved needle seat have the interval and are formed with first breach, retaining member detachably connects on the both ends of curved needle seat, first breach when the retaining member is connected on the both ends of curved needle seat is less than the retaining member breaks away from first breach when the upper end of curved needle seat.
Furthermore, the eccentric sleeve has two opposite ends, the two ends of the eccentric sleeve have an interval to form a second notch, and the second notch when the locking member is connected to the two ends of the curved needle seat is smaller than the second notch when the locking member is separated from the upper end of the curved needle seat.
In particular, the locking member is a screw.
Preferably, the larger outer diameter portion and the smaller outer diameter portion are in smooth transition.
Preferably, the eccentric sleeve is inserted between the curved needle shaft and the curved needle seat, the adjusting mechanism further comprises an adjusting flange fixedly connected with the eccentric sleeve or integrally formed with the eccentric sleeve, and the adjusting flange is provided with an adjusting groove convenient for adjusting the position of the eccentric sleeve.
Preferably, the curved needle is fixed on the curved needle seat through a screw.
The utility model adopts the above scheme, compare prior art and have following advantage:
through finely adjusting the eccentric sleeve, the eccentric sleeve is enabled to rotate relative to the curved needle shaft and the curved needle sleeve, so that the positions of the part with the larger outer diameter and the part with the smaller outer diameter are changed, the height of the curved needle shaft can be correspondingly adjusted, the effect of adjusting the distance between the curved needle piece and the needle hole of the needle is achieved, the eccentric sleeve can adapt to thread loops of different shapes formed by fabrics of different specifications or facial threads of different specifications, and the occurrence of needle skipping is avoided.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a looper adjustment mechanism of an embodiment;
FIG. 2 is a partial cross-sectional view of the side of the looper adjustment device shown in FIG. 1;
FIGS. 3 and 4 are schematic views of an adjustment mechanism;
fig. 5a, 5b and 5c are schematic views of the looper adjusting device in three states of use, respectively;
fig. 6a, 6b and 6c are schematic views of three wire loops in use.
Wherein:
1. a needle; 10. a pinhole; 2. a curved needle shaft; 3. bending a needle; 30. bending the needle point; 4. an eccentric sleeve; 40. a second notch; 41. a larger outer diameter portion; 42. a smaller outer diameter portion; 5. adjusting the flanging; 50. adjusting a ditch; 6. bending the needle seat; 60. a first notch; 7. a screw; 8. a screw; 9. and (4) facial line.
Detailed Description
The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables the advantages and features of the invention to be more readily understood by those skilled in the art. The present invention is defined in terms of the conventional viewing angle of the person skilled in the art and for convenience of description, and is not limited to a specific direction.
The embodiment provides a looper adjusting device of a chain type sewing machine. Referring to fig. 1 and 2, the looper adjusting device includes a needle 1 capable of reciprocating up and down, a looper shaft 2 driven to rotate by a power mechanism, and a looper 3 driven to rotate by the looper shaft 2. The needle 1 has a needle hole 10 at a lower portion thereof through which an upper thread is inserted, and after the upper thread is inserted through the needle hole 10 of the needle 1, a loop is formed as the needle 1 is transported up and down, and the looper 3 has a looper tip 30 for inserting the loop formed by the upper thread. The looper adjusting device also comprises an adjusting mechanism for adjusting the height difference between the looper point 30 and the needle hole 10 of the machine needle 1, and the height of the looper point 30 is adjusted through the adjusting mechanism so as to adapt to thread loops formed by upper threads (such as different thicknesses and materials) and different fabrics (such as different densities, thicknesses and materials) with different specifications, and skip needles are avoided.
As shown in fig. 1 to 4, the adjusting mechanism includes an eccentric sleeve 4. The eccentric sleeve 4 is sleeved on the curved needle shaft 2 and can rotate relative to the curved needle shaft 2, and the curved needle 3 is installed on the eccentric sleeve 4 through the curved needle seat 6. The eccentric sleeve 4 has a larger outer diameter portion 41 and a smaller outer diameter portion 42, the distance between the larger outer diameter portion 41 and the axial lead of the looper shaft 2 is larger than the distance between the smaller outer diameter portion 42 and the axial lead of the looper shaft 2, and the larger outer diameter portion 41 and the smaller outer diameter portion 42 are in smooth transition. The eccentric sleeve 4 is provided with an inner hole matched with the curved needle shaft 2, the curved needle shaft 2 penetrates through the inner hole, and the two are coaxial. The curved needle adjusting device has at least two using states, in the first using state, when the curved needle tip 30 is positioned right above the needle hole 10, the part 41 with the larger outer diameter is positioned on the upper side of the curved needle shaft 2, and a first height difference is formed between the curved needle tip 30 and the needle hole 10; in the second use state, when the looper tip 30 is positioned right above the needle hole 10, the smaller outer diameter portion 42 is positioned on the upper side of the looper shaft 2, and a second height difference is provided between the looper tip 30 and the needle hole 10, and the first height difference is larger than the second height difference. It should be noted that, when the looper adjusting device is switched from one use state to another use state, the eccentric sleeve 4 can rotate relative to the looper shaft 2 and the looper base 6, so as to adjust the phase thereof, i.e. change the positions of the larger outer diameter portion 41 and the smaller outer diameter portion 42; when the looper adjusting device is switched to any using state, the eccentric sleeve 4 is locked, the looper seat 6 and the eccentric sleeve 4 are relatively fixed and rotate synchronously along with the looper shaft 2, and the looper 3 is driven to rotate to hook threads.
In this embodiment, the looper adjusting device has at least three using states, which are an uppermost using state, a standard using state and a lowermost using state, as shown in fig. 5a, 5b and 5 c. When the looper adjusting device is in the highest position shown in fig. 5a, the larger outer diameter part 41 of the eccentric sleeve 4 is positioned at the upper side, and the height difference between the looper tip 30 and the pinhole 10 below the looper tip is d1, and the height difference between the looper tip and the pinhole is the largest; fig. 6a shows the shape of the loop of the needle thread 9 that can be accommodated in the uppermost use state, in which the bent needle tip 30 is at a high position to be inserted into the loop, otherwise, a needle skip occurs. When the looper adjusting device is in a use state at the standard position shown in fig. 5b, the middle part between the larger outer diameter part 41 and the smaller outer diameter part 42 of the eccentric sleeve 4 is positioned at the upper side, and the height difference between the looper tip 30 and the pinhole 10 below the looper tip is d2, at the moment, the height difference between the looper tip and the pinhole is moderate; fig. 6b shows the loop shape of the needle thread 9 that can be adapted in the standard position use state, in which the bent needle tip 30 is in a moderate position to be inserted into the loop, otherwise a needle skip would occur. When the looper adjusting device is in the lowest position shown in fig. 5c, the smaller outer diameter portion 42 of the eccentric sleeve 4 is located at the upper side, and the height difference between the looper tip 30 and the needle hole 10 therebelow is d3, which is the smallest; fig. 6c shows the shape of the loop of the needle thread 9 adapted in the lowest position of use, in which the bent needle tip 30 is in a lower position to be inserted into the loop, otherwise a skip occurs. Wherein d1 > d2 > d 3.
The curved needle seat 6 is sleeved on the eccentric sleeve 4 and allows the eccentric sleeve 4 to rotate relative to the eccentric sleeve. The adjusting mechanism also comprises a locking piece used for locking the curved needle seat 6 and/or the eccentric sleeve 4 so as to prevent the curved needle seat 6 and the eccentric sleeve 4 from rotating relative to the curved needle shaft 2. In this embodiment, the curved needle seat 6 has two opposite ends, and the two ends of the curved needle seat 6 have a first gap 60 formed at an interval, so that the curved needle seat 6 is substantially C-shaped or open-ring-shaped, and the curved needle seat 6 itself has a certain elasticity so as to be able to shrink under the action of external force and be fixed on the eccentric sleeve 4. Retaining member detachably connects on the both ends of bent needle file 6, and first breach 60 when the retaining member is connected on the both ends of bent needle file 6 is less than the first breach 60 when the retaining member breaks away from the upper end of bent needle file 6, is connecting the in-process at the both ends of bent needle file 6 with the retaining member promptly, and the retaining member exerts external force to bent needle file 6 for the both ends of bent needle file 6 are drawn close, and first breach 60 diminishes, the whole shrink of bent needle file 6. The locking member is embodied as a screw 7 which is threaded through both ends of the curved needle seat 6.
The eccentric sleeve 4 also has two opposite ends, and the two ends of the eccentric sleeve 4 are spaced to form the second gap 40, so that the eccentric sleeve 4 is also substantially C-shaped or open-ring-shaped, and the eccentric sleeve 4 itself has a certain elasticity so as to be able to be shrunk and fixed on the curved needle shaft 2 by an external force. The second notch 40 when the locker is attached on both ends of the curved needle holder 6 is smaller than the second notch 40 when the locker is detached from the upper end of the curved needle holder 6. That is to say, connect the in-process at the both ends of curved needle seat 6 at the retaining member, eccentric cover 4 in the curved needle seat 6 receives the produced pressure of further shrink of curved needle seat 6, also contract along with it, its both ends draw close, second breach 40 diminishes, until eccentric cover 4 is locked on curved needle axle 2, curved needle seat 6 is locked on eccentric cover 4, the three connects as an organic wholely, curved needle seat 6 and eccentric cover 4 rotate along with curved needle axle 2 is synchronous, thereby drive curved needle 3 and penetrate the wire loop.
The eccentric sleeve 4 is inserted between the curved needle shaft 2 and the curved needle seat 6, the adjusting mechanism further comprises an adjusting flange 5 fixedly connected with the eccentric sleeve 4 or integrally formed, and the adjusting flange 5 is provided with an adjusting groove 50 convenient for adjusting the position of the eccentric sleeve 4 and can be used in cooperation with a tool (such as a screwdriver). It should also be noted that the first notch 60 extends axially through the eccentric sleeve 4 and the adjustment flange 5.
The curved needle 3 is fixed on the curved needle seat 6 through a screw 8.
When the height of the bent needle point 30 needs to be adjusted, the screw 7 is unscrewed, tools such as a screwdriver and the like are clamped into the adjusting groove 50, the eccentric sleeve 4 rotates for a certain angle relative to the bent needle shaft 2 and the bent needle seat 6, the positions of the part with the larger outer diameter and the part with the smaller outer diameter are changed, and the adjustment is in place; the screw 7 is screwed down, so that the curved needle seat 6 and the eccentric sleeve 4 are locked on the curved needle shaft 2; when the sewing machine starts to work, the eccentric sleeve 4 and the looper seat 6 rotate along with the looper shaft 2, so as to drive the looper 3 to rotate for thread hooking operation.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments, which are intended to enable persons skilled in the art to understand the contents of the present invention and to implement the present invention, and thus, the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the present invention shall be covered by the protection scope of the present invention.
Claims (9)
1. The utility model provides a chain sewing machine's looper adjusting device, including the eedle that can up-and-down reciprocating motion, by power unit drive pivoted looper axle and by looper axle drive pivoted looper, the eedle has the pinhole that supplies the upper thread to pass, the looper has and is used for inserting the looper point in the wire loop that the upper thread that the eedle passed formed, its characterized in that: the curved needle adjusting device also comprises an adjusting mechanism used for adjusting the height difference between the curved needle point and the needle hole of the machine needle, the adjusting mechanism comprises an eccentric sleeve, the eccentric sleeve is sleeved on the curved needle shaft and can rotate relative to the curved needle shaft, the curved needle is arranged on the eccentric sleeve through a curved needle seat, the eccentric sleeve is provided with a part with a larger outer diameter and a part with a smaller outer diameter, and the distance between the part with the larger outer diameter and the axial lead of the curved needle shaft is greater than the distance between the part with the smaller outer diameter and the axial lead of the curved needle shaft; the curved needle adjusting device has at least two using states, in the first using state, when the curved needle point is positioned right above the needle hole, the part with the larger outer diameter is positioned on the upper side of the curved needle shaft, and a first height difference is formed between the curved needle point and the needle hole; in a second using state, when the needle bending point is positioned right above the needle hole, the smaller outer diameter part is positioned on the upper side of the needle bending shaft, a second height difference is formed between the needle bending point and the needle hole, and the first height difference is larger than the second height difference.
2. The looper adjusting device according to claim 1, wherein: the bent needle seat is sleeved on the eccentric sleeve and allows the eccentric sleeve to rotate relative to the eccentric sleeve.
3. The looper adjusting device according to claim 2, wherein: the adjusting mechanism further comprises a locking piece used for locking the bent needle seat and/or the eccentric sleeve so as to prevent the bent needle seat and the eccentric sleeve from rotating relative to the bent needle shaft.
4. The looper adjusting device according to claim 3, wherein: the curved needle file has relative both ends, the both ends of curved needle file have the interval and are formed with first breach, retaining member detachably connects on the both ends of curved needle file, the retaining member is connected when on the both ends of curved needle file first breach is less than the retaining member breaks away from when the upper end of curved needle file first breach.
5. The looper adjusting device according to claim 4, wherein: the eccentric sleeve is provided with two opposite end parts, the two end parts of the eccentric sleeve are provided with intervals to form second gaps, and the second gaps when the locking pieces are connected to the two end parts of the bent needle seat are smaller than the second gaps when the locking pieces are separated from the upper end part of the bent needle seat.
6. The looper adjusting device according to claim 3, wherein: the locking piece is a screw.
7. The looper adjusting device according to claim 1, wherein: the larger outer diameter portion and the smaller outer diameter portion are in smooth transition.
8. The looper adjusting device according to claim 1, wherein: the eccentric sleeve is inserted between the curved needle shaft and the curved needle seat, the adjusting mechanism further comprises an adjusting flange fixedly connected with the eccentric sleeve or integrally formed, and an adjusting groove convenient for adjusting the position of the eccentric sleeve is formed in the adjusting flange.
9. The looper adjusting device according to claim 1, wherein: the bent needle is fixed on the bent needle seat through a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966198.7U CN210368225U (en) | 2019-06-25 | 2019-06-25 | Curved needle adjusting device of chain type sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966198.7U CN210368225U (en) | 2019-06-25 | 2019-06-25 | Curved needle adjusting device of chain type sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210368225U true CN210368225U (en) | 2020-04-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920966198.7U Expired - Fee Related CN210368225U (en) | 2019-06-25 | 2019-06-25 | Curved needle adjusting device of chain type sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210368225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396777A (en) * | 2019-06-25 | 2019-11-01 | 吴江阳光科技缝纫机有限公司 | A kind of looper regulating device of chain type sewing machine |
-
2019
- 2019-06-25 CN CN201920966198.7U patent/CN210368225U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396777A (en) * | 2019-06-25 | 2019-11-01 | 吴江阳光科技缝纫机有限公司 | A kind of looper regulating device of chain type sewing machine |
| CN110396777B (en) * | 2019-06-25 | 2024-04-09 | 吴江阳光科技缝纫机有限公司 | Looper adjusting device of chain type sewing machine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |