CN114481474A - Sewing machine, bird nest prevention device and lifting driving mechanism - Google Patents
Sewing machine, bird nest prevention device and lifting driving mechanism Download PDFInfo
- Publication number
- CN114481474A CN114481474A CN202210180104.XA CN202210180104A CN114481474A CN 114481474 A CN114481474 A CN 114481474A CN 202210180104 A CN202210180104 A CN 202210180104A CN 114481474 A CN114481474 A CN 114481474A
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- Prior art keywords
- rod
- connecting rod
- driving mechanism
- lifting plate
- bracket
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B53/00—Thread- or cord-laying mechanisms; Thread fingers
Abstract
The invention discloses a lifting mechanism, a bird nest prevention device and a sewing machine comprising the device, wherein the lifting mechanism comprises a bracket, a lifting plate, a thread hooking component and an air suction component, wherein the bracket is used for being fixed on a shell of the sewing machine; the swing rod is rotatably arranged on the bracket; the driving mechanism is arranged on the bracket and drives the oscillating bar to rotate; one end of the swing rod is hinged with a first connecting rod component, and the first connecting rod component drives the lifting plate to move up and down; the other end of the swing rod is hinged with a second connecting rod assembly, and the second connecting rod assembly is connected with a hook wire and a hook wire rod of the air suction assembly; when the lifting plate moves downwards, the front end of the thread hooking rod extends to a presser foot of the sewing machine; when the lifting plate moves upwards, the front end of the thread hooking rod retracts and hooks threads. The bird nest prevention device can realize the extension and retraction of the wire hooking rod and the integral movement of the wire hooking and air suction assembly by utilizing one driving mechanism. But also can increase the operation space through the whole movement of colluding the line and the subassembly that induced drafts.
Description
The application is CN202011026017.6, a split application of an anti-nest device and a sewing machine.
Technical Field
The invention belongs to the technical field of sewing machines, and particularly relates to a bird nest prevention device and a sewing machine comprising the same.
Background
At present, with the improvement of sewing effect, a bird nest prevention device appears. The device can reduce the condition that the bottom thread at the beginning of the sewing process after the upper thread is left on the presser foot surface and sewing is started when the flat sewing machine starts sewing.
However, the existing bird nest prevention device adopts a cylinder to realize the extension and retraction of the wire hooking rod. For example, patent No. 2017216091457, which discloses a structural type of bird nest prevention device. However, in practice, in order to give the operator a wider space, in addition to the extension and retraction of the wire hooking rod, the movement of the wire hooking and air suction assembly is required. Through the movement of the thread hooking component and the air suction component, a larger space can be reserved when the fingers send the cloth.
However, if a driving mechanism is directly added to separately control the movements of the hook wire and the air suction assembly, the interference of the two actions is caused and the price of the product is increased.
Disclosure of Invention
The invention aims to provide a lifting driving mechanism, a bird nest prevention device and a sewing machine with the bird nest prevention device. The bird nest prevention device can realize the extension and retraction of the wire hooking rod and the integral movement of the wire hooking and air suction assembly by utilizing one driving mechanism.
The purpose of the invention is realized as follows: an anti-nest device comprises a bracket which is used for being fixed on a shell of a sewing machine and also comprises
The lifting plate is arranged on the bracket and can lift up and down;
the thread hooking and air suction assembly is arranged on the lifting plate and is used for hooking and sucking away the sewing thread at the presser foot;
the swing rod is rotatably arranged on the bracket;
the driving mechanism is arranged on the bracket and drives the oscillating bar to rotate;
one end of the swing rod is hinged with a first connecting rod component, and the first connecting rod component drives the lifting plate to move up and down;
the other end of the swing rod is hinged with a second connecting rod assembly, and the second connecting rod assembly is connected with the wire hooking rod of the wire hooking and air suction assembly;
when the lifting plate moves downwards, the front end of the thread hooking rod extends to a presser foot of the sewing machine;
when the lifting plate moves upwards, the front end of the wire hooking rod retracts and hooks the wire.
Preferably, the driving mechanism is a rotary electromagnet or a rotary cylinder.
Preferably, the lower end of the first link assembly is hinged to the lifting plate by a fastener.
Preferably, a sliding groove is formed in one side of the lifting plate, a plurality of fastening pieces are arranged in the sliding groove, and each fastening piece penetrates through the sliding groove and is connected with the support, so that the lifting plate can be lifted up and down.
Preferably, the second connecting rod assembly comprises a vertical connecting rod, a bent connecting rod and a diagonal draw rod which are sequentially connected end to end;
one end of the vertical connecting rod is hinged with the other end of the oscillating rod;
the bent connecting rod is rotatably arranged on the bracket, and the two ends of the rotating fulcrum of the bent connecting rod are respectively hinged with a vertical connecting rod and a diagonal draw bar;
one end of the diagonal draw bar is connected with the tail end of the wire hooking rod.
Preferably, a crank is arranged between the wire hooking rod and the diagonal draw bar, a mounting hole is formed at the upper end of the crank, and the mounting hole is connected with the wire hooking rod through a fastener;
a pin shaft is formed on the side surface of the crank, and the inclined pull rod is sleeved on the outer side of the pin shaft;
the pin shaft is perpendicular to the mounting hole.
Preferably, the lower extreme of lifter plate is provided with colludes the spring axle, the support upside extends the shaping and has colluded the spring lamella, collude the spring lamella with collude between the spring axle and be connected with the spring.
Preferably, the lower extreme of support is provided with the limiting plate, and limiting plate one side is connected with the lifter plate.
A sewing machine comprising the bird nest prevention device of any one of the above.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
1. compared with the prior art, the invention can realize the movement of the thread hooking rod, the thread hooking component and the air suction component through one driving mechanism. Therefore, the structural design not only increases the cost because a new driving mechanism is not added, but also can not cause the two actions of the expansion of the line hooking rod and the integral movement of the line hooking and air suction assembly to generate interference.
2. In addition, when the thread hooking rod stretches, the thread hooking rod and the air suction assembly move integrally, and a larger operation space can be provided for an operator, so that the cloth feeding is facilitated for the operator to finger.
Drawings
FIG. 1 is one of the schematic structural diagrams of the present invention;
FIG. 2 is a second schematic diagram of the present invention;
FIG. 3 is a schematic view of an anti-nest mechanism;
FIG. 4 is a second schematic view of the anti-nest mechanism;
FIG. 5 is a third schematic view of an anti-nest mechanism;
fig. 6 is an exploded view of the connection between the hook wire rod and the diagonal member.
In the figure: 1-a presser bar; 2-a fastener; 3-lifting plate; 4-a chute; 5-a drive mechanism; 6-a scaffold; 7-oscillating bars; 8-a first link assembly; 9-diagonal draw bars; 10-a bent connecting rod; 11-vertical connecting rod; 12-a thread hooking rod; 13-thread hooking and air suction components; 14-a crank; 15-presser foot; 16-a spring; 17-a limiting plate; 18-a protective cover; 19-a clamp spring; 31-hook spring shaft; 51-a drive shaft; 61-hook reed petals; 100-a housing; 141-mounting holes; 142-a pin shaft; 200-an anti-bird nest device; 300-a base plate; 400-a second linkage assembly.
Detailed Description
The invention is further described below in terms of specific examples.
The first embodiment is as follows: the embodiment specifically discloses a structure of a sewing machine, as shown in fig. 1, the sewing machine at least comprises a housing 100, a bottom plate 300 and an anti-nest device 200; a presser bar 1 and a presser foot 15 provided on the base plate 300 are provided in the housing 100.
As shown in fig. 1 to 5, the bird's nest prevention device 200 according to the present embodiment is installed near the presser bar 1 and the presser foot 15. As shown particularly in fig. 1 and 2, the bird nesting prevention device 200 further includes a protective cover 18, the protective cover 18 being configured to reduce the ingress of dust or lint into the bird nesting prevention device 200.
The following specifically describes the internal structure of the anti-bird nest device:
as shown in fig. 3, an anti-bird nest device includes a bracket 6 for fixing to a housing 100 of a sewing machine and for connecting other components such as a driving mechanism 5; also comprises
A lifting plate 3 which is mounted on the bracket 6 and can be lifted up and down;
a thread hooking and air suction assembly 13 mounted on the lifter plate 3 for hooking and sucking away the sewing thread at the presser foot 15; preferably, in this embodiment, the hooking and air suction assembly 13 and the lifting plate 3 are integrally formed, so that the strength of the part can be increased, and the service life of the product can be prolonged.
The swing rod 7 is rotatably arranged on the bracket 6;
the driving mechanism 5 is arranged on the bracket 6 and drives the swing rod 7 to rotate; in this embodiment, a driving shaft 51 is disposed at one end of the driving mechanism 5, and the driving shaft 51 penetrates through the swing link 7 to drive the swing link 7 to rotate.
One end of the oscillating bar 7 is hinged with a first connecting rod component 8, and the first connecting rod component 8 drives the lifting plate 3 to move up and down;
the other end of the swing rod 7 is hinged with a second connecting rod assembly 400, and the second connecting rod assembly is connected with the tail end of a wire hooking rod 12 of the wire hooking and air suction assembly 13;
therefore, in the present embodiment, the driving shaft 51 is used as a rotation fulcrum, and the first link assembly 8 and the second link assembly 400 are respectively disposed on both sides of the driving shaft 51 to form a lever structure, so that the lifting plate 3 can be driven to move up and down and the wire hooking rod 12 can be driven to move by a driving mechanism 5.
Therefore, as shown in fig. 4, when the lifting plate 3 moves downward, the front end of the thread hooking rod 12 extends to the presser foot 15 of the sewing machine;
when the lifting plate 3 moves upwards, the front end of the thread hooking rod 12 retracts and hooks threads.
Thus, in this embodiment, the movement of the thread hooking rod 12 and the thread hooking and suction assembly 13 is achieved by a single drive mechanism 5. Not only does not increase the cost, but also can drive the lifting plate 3 to move after each operation of the thread hooking rod 12. The lifting plate 3 moves to drive the hook wire and the air suction assembly 13 to move integrally. And the whole movement of the thread hooking and air suction assembly 13 can provide a larger operation space for an operator, and the work efficiency is improved.
Preferably, the driving mechanism 5 is a rotary electromagnet or a rotary cylinder. The two products are mature products in the market, and have the advantages of convenient purchase, low cost and stable performance. The corresponding drive shaft 51 is therefore the shaft of an electromagnet or cylinder.
Preferably, the lower end of the first link assembly 8 is hinged to the lifting plate 3 by a shaft screw. One side shaping of lifter plate 3 has spout 4, is provided with a plurality of fastener 2 in the spout 4, every fastener 2 pass spout 4 and with support 6 is connected, and then realizes the oscilaltion of lifter plate 3.
The above description specifically describes a technical solution in which the first link assembly 8 drives the lifting plate 3 to move up and down. The first connecting rod assembly 8 is hinged with the lifting plate 3, and meanwhile, the swing rod 7 is hinged with the first connecting rod assembly 8, so that the swing of the swing rod 7 can be converted into the up-and-down movement of the lifting plate 3.
Meanwhile, the fastener 2 is arranged in the sliding groove 4, so that the lifting track of the lifting plate 3 can be limited. Also in the present embodiment, it is preferable that the number of the fastening members 2 is two, and a "straight line" which is a trajectory of the up-and-down movement of the elevating plate 3 is determined by two fastening members. Due to the design, the up-down lifting track of the lifting plate 3 can be ensured to be arranged according to the track of the fastening pieces 2, so that the up-down moving track of the lifting plate 3 can be more controllable.
The structure of the second link assembly 400 driving the wire hooking rod 12 to move will be described in detail as follows:
preferably, as shown in fig. 4, the second connecting rod assembly 400 includes a vertical connecting rod 11, a bent connecting rod 10 and a diagonal draw bar 9 which are connected end to end in sequence;
one end of the vertical connecting rod 11 is hinged with the other end of the swing rod 7. Specifically, as shown in fig. 4, the vertical connecting rod 11 is hinged with the right end of the swing rod 7 through a fastener; the lower end of the vertical connecting rod 11 is hinged with the bent connecting rod 10.
The bent connecting rod 10 is rotatably arranged on the bracket 6, and the two ends of the rotating fulcrum of the bent connecting rod 10 are respectively hinged with a vertical connecting rod 11 and a diagonal draw bar 9; as shown in FIG. 4, the design can form a "lever" structure, so that the vertical link 11 can be converted into the diagonal draw bar 9 to swing left and right, and one end of the diagonal draw bar 9 can be connected with the tail end of the thread hooking rod 12, so as to realize the extension and retraction of the thread hooking rod 12.
In this embodiment, the pivot point of the bent link 10 is the position of the axis screw 18. And the position of the axis screw 18 is exactly at the bend of the bend link 10. As shown in fig. 4, the entire shape of the bent link 10 is "L-shaped". Particularly, one end of the horizontal short side of the bent connecting rod 10 is hinged with the vertical connecting rod 11, and one end of the vertical long side of the bent connecting rod 10 is hinged with the diagonal draw bar 9. Also in the embodiment, the angle between the long and short sides of the bent link 10 may be an obtuse angle. A shaft screw 18 passes through the bent link 10 and is connected to the bracket 6.
In addition, as shown in fig. 3, the bent link 10 further has a bent portion formed at a long side thereof and bent outward, so that a position can be left for facilitating the connection between the diagonal draw bar 9 and the hook bar 12.
As shown in fig. 6, preferably, a crank 14 is arranged between the thread hooking rod 12 and the diagonal draw bar 9, a mounting hole 141 is formed at the upper end of the crank 14, and the mounting hole 141 is connected with the thread hooking rod 12 through a fastener;
a pin shaft 142 is formed on the side surface of the crank 14, and the inclined pull rod 9 is sleeved on the outer side of the pin shaft 142;
the pin 142 is perpendicular to the mounting hole 141.
In the present embodiment, both the diagonal draw bar 9 and the hook bar 12 have a plate shape. In practical use, the diagonal draw bar 9 and the line hooking bar 12 are perpendicular, and the conventional axial position screw cannot solve the problem of hinging between the diagonal draw bar 9 and the line hooking bar 12. Therefore, the design of the crank 14 in which the pin 142 is perpendicular to the mounting hole 141 can solve the above technical problem and realize power transmission in two perpendicular directions.
The pin 142 is perpendicular to the mounting hole 141 in this embodiment, which means that the axis of the pin 142 is perpendicular to the axis of the mounting hole 141.
Meanwhile, in order to increase the tightness of the connection between the pin shaft 142 and the diagonal draw bar 9, the snap spring 19 is abutted against the end surface of the diagonal draw bar 9 and simultaneously clamps the clamping groove on the pin shaft 142.
As shown in fig. 5, a hook spring shaft 31 is preferably provided at a lower end of the lifting plate 3, a hook spring petal 61 is formed at an upper side of the bracket 6 in an extending manner, and a spring 16 is preferably connected between the hook spring petal 61 and the hook spring shaft 31.
The above-mentioned technical scheme who specifically discloses a can assist lifter plate 3 to realize reseing. Further, the hook spring shaft 31 is integrally formed with the lifting plate 3 and the hook spring shaft 31 extends toward the bracket 6. Meanwhile, the hook spring petal 61 and the hook spring shaft 31 are arranged on the same side, so that a connecting rod mechanism on the other side of the lifting plate 3 can be avoided, and the space is fully utilized.
In the present embodiment, the bracket 6 is fixed to the housing 100 and does not move with the movement of the lifting plate 3.
As shown in fig. 5, preferably, a limiting plate 17 is disposed at the lower end of the bracket 6, and the lifting plate 3 is connected to one side of the limiting plate 17. The limiting plate 17 is used for limiting when the lifting plate 3 moves to the set limit position, and the limiting can be realized by the way that the limiting plate 17 abuts against the lower end of the bracket 6.
Meanwhile, as a preferred technical scheme, as shown in fig. 5, a groove is formed at the lower end of the limiting plate 17, and the size of the groove is matched with that of the hook spring shaft 31, so that the hook spring shaft 31 can be overlapped with the limiting plate 17, and space can be saved.
The limit plate 17 is fixed by fastening the fasteners on two sides of the limit plate to fasten the limit plate with the lifting plate 3, so that the connection is simple, effective and stable.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A lifting driving mechanism of a bird nest prevention device comprises a bracket (6) which is used for being fixed on a shell (100) of a sewing machine, and is characterized by also comprising
A lifting plate (3) which is mounted on the bracket (6) and can be lifted up and down; the lifting plate (3) is used for installing a wire hooking rod (12);
the swing rod (7) is rotatably arranged on the bracket (6); one end of the swing rod (7) drives the lifting plate to move up and down; the other end of the swing rod (7) is used for driving the thread hooking rod (12) to extend or retract;
and the driving mechanism (5) is arranged on the bracket (6) and drives the swing rod (7) to rotate.
2. The lifting driving mechanism of the bird nest prevention device according to claim 1, wherein one end of the swing link (7) is hinged with a first link assembly (8), and the first link assembly (8) drives the lifting plate to move up and down; the other end of the swing rod (7) is hinged with a second connecting rod assembly (400);
when the lifting plate (3) moves downwards, the second connecting rod assembly (400) drives the front end of the thread hooking rod (12) to extend to a presser foot (15) of the sewing machine;
when the lifting plate (3) moves upwards, the second connecting rod assembly (400) drives the front end of the wire hooking rod (12) to retract and hook a wire.
3. The lifting driving mechanism of the bird nest prevention device according to claim 1, wherein the driving mechanism (5) is a rotary electromagnet or a rotary cylinder.
4. The elevating driving mechanism of an anti-nest device according to claim 1, characterized in that the lower end of the first link assembly (8) is hinged with the elevating plate (3) by a fastener; one side shaping of lifter plate (3) has spout (4), is provided with a plurality of fastener (2) in spout (4), every fastener (2) pass spout (4) and with support (6) are connected, and then realize the oscilaltion of lifter plate (3).
5. The lifting driving mechanism of the bird nest prevention device according to claim 1, wherein the second connecting rod assembly (400) comprises a vertical connecting rod (11), a bent connecting rod (10) and a diagonal draw bar (9) which are sequentially connected end to end;
one end of the vertical connecting rod (11) is hinged with the other end of the swing rod (7);
the bent connecting rod (10) is rotatably arranged on the bracket (6), and the two ends of the rotating fulcrum of the bent connecting rod (10) are respectively hinged with a vertical connecting rod (11) and a diagonal draw bar (9);
one end of the diagonal draw bar (9) is connected with the tail end of the wire hooking rod (12).
6. The lifting driving mechanism of the bird nest prevention device according to claim 55, wherein a crank (14) is arranged between the wire hooking rod (12) and the diagonal draw bar (9), a mounting hole (141) is formed at the upper end of the crank (14), and the mounting hole (141) is connected with the wire hooking rod (12) through a fastener;
a pin shaft (142) is formed on the side surface of the crank (14), and the inclined pull rod (9) is sleeved on the outer side of the pin shaft (142);
the pin shaft (142) is perpendicular to the mounting hole (141).
7. The lifting driving mechanism of the bird nest prevention device according to claim 1, wherein the lower end of the lifting plate (3) is provided with a hook spring shaft (31), a hook spring petal (61) is formed on the upper side of the bracket (6) in an extending manner, and a spring (16) is connected between the hook spring petal (61) and the hook spring shaft (31).
8. The lifting driving mechanism of the bird nest prevention device according to claim 1 or 7, wherein a limiting plate (17) is arranged at the lower end of the bracket (6), and the lifting plate (3) is connected to one side of the limiting plate (17).
9. An anti-nest device, comprising the elevating drive mechanism of the anti-nest device according to any one of claims 1 to 8; the thread hooking and air suction component (13) is also included, and the thread hooking and air suction component (13) comprises the thread hooking rod (12); the thread hooking and air suction assembly (13) is arranged on the lifting plate (3) and is used for hooking and sucking away the sewing thread at the presser foot (15).
10. A sewing machine characterized by: comprising the anti-bird nest device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180104.XA CN114481474A (en) | 2022-02-26 | 2022-02-26 | Sewing machine, bird nest prevention device and lifting driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180104.XA CN114481474A (en) | 2022-02-26 | 2022-02-26 | Sewing machine, bird nest prevention device and lifting driving mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114481474A true CN114481474A (en) | 2022-05-13 |
Family
ID=81484928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210180104.XA Withdrawn CN114481474A (en) | 2022-02-26 | 2022-02-26 | Sewing machine, bird nest prevention device and lifting driving mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114481474A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3448708A (en) * | 1967-06-23 | 1969-06-10 | Singer Co | Thread wiper and thread end holder for sewing machines |
| CN204780187U (en) * | 2015-07-13 | 2015-11-18 | 浙江佳岛缝纫机有限公司 | Prevent template machine of bird's nest |
| CN206873071U (en) * | 2017-06-23 | 2018-01-12 | 浙江中捷缝纫科技有限公司 | A kind of anti-Bird's Nest device of sewing machine |
| CN207919103U (en) * | 2018-03-02 | 2018-09-28 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device of electromagnetism |
| CN209144401U (en) * | 2018-11-16 | 2019-07-23 | 安徽杰羽制鞋机械科技有限公司 | A kind of anti-Bird's Nest structure of sewing machine |
| CN209456684U (en) * | 2019-01-24 | 2019-10-01 | 浙江大森缝纫机有限公司 | A kind of sewing machine with hooking thread clamping mechanism |
| CN112048844A (en) * | 2020-09-25 | 2020-12-08 | 浙江杜马缝纫机股份有限公司 | Bird nest prevention device and sewing machine |
| CN212335495U (en) * | 2020-09-25 | 2021-01-12 | 浙江杜马缝纫机股份有限公司 | Bird nest prevention device and sewing machine |
| CN215209927U (en) * | 2021-07-29 | 2021-12-17 | 河北奔发制衣有限公司 | Bird nest prevention device and sewing machine |
-
2022
- 2022-02-26 CN CN202210180104.XA patent/CN114481474A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3448708A (en) * | 1967-06-23 | 1969-06-10 | Singer Co | Thread wiper and thread end holder for sewing machines |
| CN204780187U (en) * | 2015-07-13 | 2015-11-18 | 浙江佳岛缝纫机有限公司 | Prevent template machine of bird's nest |
| CN206873071U (en) * | 2017-06-23 | 2018-01-12 | 浙江中捷缝纫科技有限公司 | A kind of anti-Bird's Nest device of sewing machine |
| CN207919103U (en) * | 2018-03-02 | 2018-09-28 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device of electromagnetism |
| CN209144401U (en) * | 2018-11-16 | 2019-07-23 | 安徽杰羽制鞋机械科技有限公司 | A kind of anti-Bird's Nest structure of sewing machine |
| CN209456684U (en) * | 2019-01-24 | 2019-10-01 | 浙江大森缝纫机有限公司 | A kind of sewing machine with hooking thread clamping mechanism |
| CN112048844A (en) * | 2020-09-25 | 2020-12-08 | 浙江杜马缝纫机股份有限公司 | Bird nest prevention device and sewing machine |
| CN212335495U (en) * | 2020-09-25 | 2021-01-12 | 浙江杜马缝纫机股份有限公司 | Bird nest prevention device and sewing machine |
| CN215209927U (en) * | 2021-07-29 | 2021-12-17 | 河北奔发制衣有限公司 | Bird nest prevention device and sewing machine |
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Application publication date: 20220513 |