CN107761271B - Sewing machine and take-up eccentric device thereof - Google Patents
Sewing machine and take-up eccentric device thereof Download PDFInfo
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- CN107761271B CN107761271B CN201711173128.8A CN201711173128A CN107761271B CN 107761271 B CN107761271 B CN 107761271B CN 201711173128 A CN201711173128 A CN 201711173128A CN 107761271 B CN107761271 B CN 107761271B
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- eccentric wheel
- eccentric
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- thread take
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B49/00—Take-up devices, e.g. levers, for the needle thread
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- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a thread take-up eccentric device for a sewing machine, which comprises a rotatable upper shaft and a first eccentric wheel fixed on the upper shaft, wherein the first eccentric wheel is fixed along the axial direction of the upper shaft; the outer side wall of the first eccentric wheel is rotatably sleeved with the take-up connecting rod and the second eccentric wheel, the side wall of the first eccentric wheel is provided with an elastic clamping part which can stretch out and draw back along the radial direction, and the side wall of the second eccentric wheel is provided with two clamping grooves which are separated by 180 degrees and can be respectively clamped and matched with the elastic clamping part; still include with the contact of elasticity joint portion, can break away from the ejector pin subassembly of elasticity joint portion in the draw-in groove. The invention also discloses a sewing machine comprising the thread take-up eccentric device. The thread take-up eccentric device can conveniently realize the adjustment of the thread take-up eccentricity.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a sewing machine and a thread take-up eccentric device thereof.
Background
It is known that the sewing thickness varies greatly in the case of different types of sewing material, and in order to better adapt to different situations, the machine adaptability can be generally achieved by adjusting the take-up thread eccentricity. However, the eccentric adjustment mode in the prior art is troublesome, and the adjustment is performed by opening the upper cover, which wastes time and labor.
Disclosure of Invention
The invention aims to provide a sewing machine and a thread take-up eccentric device thereof, which can conveniently realize the adjustment of the thread take-up eccentric.
To achieve the above object, the present invention provides a thread take-up eccentric device for a sewing machine, comprising a rotatable upper shaft,
the eccentric shaft further comprises a first eccentric wheel fixed on the upper shaft, and the first eccentric wheel is fixed along the axial direction of the upper shaft;
the outer side wall of the first eccentric wheel is rotatably sleeved with a take-up connecting rod and a second eccentric wheel, the side wall of the first eccentric wheel is provided with an elastic clamping part which can stretch out and draw back along the radial direction, and the side wall of the second eccentric wheel is provided with two clamping grooves which are separated by 180 degrees and can be respectively clamped and matched with the elastic clamping part;
the ejector rod component is in contact with the elastic clamping part and can separate the elastic clamping part from the clamping groove;
when the thread picking amount is adjusted, the ejector rod component abuts against the elastic clamping portion, the elastic clamping portion is separated from one of the clamping grooves, the upper shaft and the first eccentric wheel rotate synchronously, the thread picking connecting rod and the second eccentric wheel are fixed, the elastic clamping portion rotates relative to the second eccentric wheel to the other clamping groove, and the position of the rotation axis of the upper shaft relative to the matching center line of the thread picking connecting rod and the second eccentric wheel is changed.
Compared with the prior art, the thread take-up eccentric device provided by the invention has the advantages that the first eccentric wheel is separated from the second eccentric wheel by the elastic clamping part through pressing the ejector rod assembly, the first eccentric wheel and the upper shaft are rotated by 180 degrees, the first eccentric wheel is connected with the second eccentric wheel again, and the thread take-up amount is adjusted in the process; by the arrangement, the adjustment of the thread take-up amount by manpower is facilitated, the complex operation required to be executed is avoided, the thread take-up amount adjustment can be completed only through the two actions of pressing and rotating, the working time is greatly shortened, and the production efficiency is improved; meanwhile, the thread take-up eccentric device is simple in structure and convenient to maintain.
Preferably, the upper shaft is further sleeved with a gasket and a balance block for limiting the axial displacement of the second eccentric wheel.
Preferably, the elastic clamping portion includes:
the spring is positioned in the limit groove of the first eccentric wheel and can stretch out and draw back along the radial direction of the upper shaft; the limiting groove of the first eccentric wheel limits the circumferential displacement of the spring;
and the limiting pin block is positioned at the top of the spring and can be alternatively clamped in the two clamping grooves.
Preferably, the thread take-up connecting rod and the gasket are respectively located on two axial sides of the second eccentric wheel, and the balance block is tightly attached to the gasket.
Preferably, the ram assembly comprises:
a vertically disposed drive rod; the driving rod comprises a main body part with a smaller section size, an upper driving part and a lower driving part which are positioned at the upper end and the lower end of the main body part and have a larger section size, and the bottom end of the lower driving part can abut against the elastic clamping part;
the driving spring is sleeved on the periphery of the main body part, and the top end of the driving spring is abutted against the bottom end of the upper driving part; the bottom end of the driving spring is propped against the oil receiving disc; and the limiting clamp spring is fixed on the driving rod and used for limiting the axial position of the driving spring. Preferably, the device further comprises a button located above the driving rod and used for enabling the driving rod to vertically move, and the button is connected with a return spring used for returning the button.
Preferably, the button has an end surface capable of abutting against the top end of the upper driving part, and the end surface of the button is provided with a snap spring fixed relative to the button; the button is provided with an accommodating groove for accommodating the reset spring, the top end of the reset spring is abutted against the accommodating groove, and the bottom end of the reset spring is abutted against the notch of the upper cover.
Preferably, the vertical movement axis of the button and the vertical movement axis of the upper drive part have an offset distance therebetween.
Preferably, the top of the upper driving part has a lug extending toward one side of the button.
The invention provides a sewing machine, which comprises the thread take-up eccentric device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a thread take-up eccentric device according to an embodiment of the present invention;
FIG. 2 is another schematic angle view of FIG. 1;
FIG. 3 is a further perspective view of FIG. 1;
FIG. 4 is an assembled view of the button of FIG. 1;
fig. 5 is an exploded view of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, fig. 1 is a schematic structural view of a thread take-up eccentric device according to an embodiment of the present invention; FIG. 2 is another schematic angle view of FIG. 1; FIG. 3 is a further perspective view of FIG. 1; FIG. 4 is an assembled view of the button of FIG. 1; fig. 5 is an exploded view of fig. 1.
The invention provides a thread take-up eccentric device for a sewing machine, which mainly comprises an upper shaft 16, wherein the upper shaft 16 is rotatably arranged in a machine shell 7, a first eccentric wheel 11 is fixed on the upper shaft 16, and the first eccentric wheel 11 is fixed along the axial direction of the upper shaft 16, as shown in the attached drawings 1-5 in the specification. The centroid of the first eccentric 11 is not on the axis of rotation of the upper shaft 16. The first eccentric wheel 11 is fixedly connected with the upper shaft 16 and rotates synchronously.
The outer side wall of the first eccentric wheel 11 is sleeved with the thread take-up connecting rod 14 and the second eccentric wheel 15, the thread take-up connecting rod 14 and the second eccentric wheel 15 are tightly attached in the axial direction, and the thread take-up connecting rod 14 and the second eccentric wheel 15 can rotate relative to the first eccentric wheel 11. The arrangement of the thread take-up link 14 can be found in the prior art.
The side wall of the first eccentric wheel 11 is provided with an elastic clamping part which can stretch out and draw back along the radial direction, and the side wall of the second eccentric wheel 15 is provided with two clamping grooves which are separated by 180 degrees and can be respectively clamped and matched with the elastic clamping part; besides, the ejector rod assembly can be in contact with the elastic clamping portion, and the elastic clamping portion can be separated from the clamping groove of the second eccentric wheel 15 under the pressing action of the ejector rod assembly.
When the thread picking amount is adjusted, the ejector rod component abuts against the elastic clamping portion, the elastic clamping portion is separated from one clamping groove, the upper shaft 16 and the first eccentric wheel 11 are synchronously rotated, the thread picking connecting rod 14 and the second eccentric wheel 15 are fixed, the elastic clamping portion rotates relative to the second eccentric wheel 15 to the other clamping groove, and the position of the rotation axis of the upper shaft 16 relative to the matching center line of the thread picking connecting rod 14 and the second eccentric wheel 15 is changed.
The centroid of the first eccentric wheel 11 is located on the matching central line of the thread picking connecting rod 14 and the second eccentric wheel 15, when the upper shaft 16 and the first eccentric wheel 11 rotate synchronously, the first eccentric wheel 11 rotates relative to the thread picking connecting rod 14 and the second eccentric wheel 15, and because the first eccentric wheel 11 only rotates under the action of the thread picking connecting rod 14 and the second eccentric wheel 15, the position of the rotation axis of the upper shaft 16 relative to the matching central line of the thread picking connecting rod 14 and the second eccentric wheel 15 changes, namely the swing amplitude of the upper shaft 16 driving the thread picking connecting rod 14 to swing is adjusted, so that the adjustment of thread picking amount is realized, the requirements of sewing materials with different thicknesses on the thread picking amount are met, the formation of high-quality stitches is facilitated, and the sewing quality is improved.
With such arrangement, when the wire picking amount needs to be adjusted, a user only presses the ejector rod assembly and rotates the upper shaft 16; the purpose of pressing the push rod assembly is to separate the first eccentric wheel 11 from the second eccentric wheel 15 (at this time, the elastic clamping part is separated from one clamping groove), so that relative motion can be ensured between the two; when the rotating shaft rotates 180 degrees, the elastic clamping part is clamped with the other clamping groove, the first eccentric wheel 11 is combined with the second eccentric wheel 15, and the rotating shaft 16 drives the take-up connecting rod 14 and the second eccentric wheel 15 to rotate synchronously. After the elastic clamping part is clamped with the other clamping groove, the rotating axis of the upper shaft 16 is changed in position relative to the matching center line of the thread take-up connecting rod 14 and the second eccentric wheel 15, and the adjustment of the thread take-up amount is completed.
In order to avoid the axial slippage of the second eccentric wheel 15 during the thread take-up amount adjustment, a gasket 17 and a balancing block 18 can be sleeved on the upper shaft 16, as shown in the specification and the attached figure 5. The gasket 17 and the balance weight 18 can be fixedly arranged relative to the upper shaft 16, and the gasket 17, the balance weight 18 and the upper shaft 16 synchronously move; when the upper shaft 16 and the first eccentric wheel 11 are rotated when adjusting the thread picking amount, because the positions of the gasket 17 and the balancing block 18 relative to the upper shaft 16 are not changed, the movement of the thread picking connecting rod 14 and the second eccentric wheel 15 can be limited in the axial direction, and unnecessary slippage in the axial direction can be avoided. The thread take-up connecting rod 14 and the gasket 17 can be respectively located on two axial sides of the second eccentric wheel 15, and the balance block 18 is tightly attached to the gasket 17, so that reasonable layout and reliable use among all parts can be further ensured.
The elastic clamping part comprises a spring 13 and a limiting pin block 12, as shown in the attached figure 5 of the specification; the outer side wall of the first eccentric wheel 11 is provided with a limiting groove, the spring 13 is positioned in the limiting groove, the spring 13 can stretch and contract along the radial direction of the upper shaft 16, and the limiting groove can limit the circumferential displacement of the spring 13; that is, the spring 13 can only expand and contract in the radial direction of the upper shaft 16, and no further displacement of the spring 13 relative to the first eccentric 11 occurs. The limit pin block 12 is located at the top of the spring 13, and the limit pin block 12 is alternatively clamped in the two clamping grooves.
Taking the specification of fig. 5 as an example, when the thread take-up amount needs to be adjusted, the limit pin block 12 moves downwards by pressing the ejector rod assembly downwards, the spring 13 is compressed, the limit pin block 12 is separated from one clamping groove (the clamping groove at the upper end shown in fig. 5) of the second eccentric wheel 15, then the upper shaft 16 and the first eccentric wheel 11 rotate synchronously, the first eccentric wheel 11 drives the limit pin block 12 and the spring 13 to rotate synchronously relative to the second eccentric wheel 15, the spring 13 is always in a compressed state during the rotation, and the limit pin block 12 is not fixed; when the upper shaft 16 and the first eccentric wheel 11 rotate 180 degrees, and the limit pin block 12 is positioned in another slot (a slot positioned at the lower end shown in fig. 5) of the second eccentric wheel 15, the limit pin block 12 extends into the slot to complete limit, and at this time, the first eccentric wheel 11 is connected with the second eccentric wheel 15, so that synchronous rotation can be realized; in the process, the rotating axis of the upper shaft 16 is changed in position relative to the matching central line of the thread take-up connecting rod 14 and the second eccentric wheel 15, so that the thread take-up amount is adjusted.
The push rod assembly mainly comprises a driving rod 8 and a driving spring 9, as shown in the attached figure 5 of the specification, the driving rod 8 is vertically arranged, the driving rod 8 comprises a main body part, an upper driving part and a lower driving part, the section size of the main body part is smaller, and the section sizes of the upper driving part and the lower driving part are larger; and the bottom end of the lower driving part is propped against the limit pin block 12, namely when the push rod assembly is pressed, the limit pin block 12 moves downwards to compress the spring 13.
The driving spring 9 is sleeved on the periphery of the main body part, and the top end of the driving spring 9 is abutted against the bottom end of the upper driving part; the bottom end of the driving spring 9 is abutted against the oil receiving disc 4, and the limiting snap spring 10 is fixed on the driving rod 8 and used for limiting the axial position of the driving spring 9; when the ejector rod assembly is pressed, the driving rod 8 moves downwards, and the main body part, the upper driving part and the lower driving part synchronously move downwards, so that the limiting pin block 12 moves downwards, and the positions of the limiting clamp spring 10 and the oil receiving disc 4 are unchanged; the driving spring 9 is compressed under the action of the upper driving part (moving downwards) and the limiting clamp spring 10 (fixed in position); when the pressure on the ejector rod component is released, the driving spring 9 can return to the original length, at the moment, the driving rod 8 moves upwards, and the driving rod 8 returns to the original position.
A button 1 can be arranged above the driving rod 8, and the button 1 is connected with a return spring 2 for returning the button 1. The push button 1 functions similarly to the drive rod 8, both to provide downward pressure; the button 1 is positioned beside the oil filling opening of the cover plate 6 and can be used as an oil window, as shown in the attached figure 4 of the specification. The button 1 is provided with an end surface which is used for abutting against the top end of an upper driving part of the driving rod 8; the clamp spring 3 is arranged on the end face of the button 1 and is fixed relative to the button 1. The button 1 has and is annular holding tank, can vertically place reset spring 2 in the holding tank, and reset spring 2's top supports in the holding tank, and reset spring 2's bottom supports in upper cover 6. When the button 1 is pressed, the end face of the button 1 applies downward pressure to the driving rod 8, the driving rod 8 moves downwards, the return spring 2 is compressed under the action of the accommodating groove (moving downwards) and the upper cover 6 (fixed in position), and when the pressure on the button 1 is released, the return spring 2 can return to the original length, the button 1 moves upwards at the moment, and the button 1 returns to the original position.
The vertical movement axis of the button 1 and the vertical movement axis of the upper driving part have an offset distance, as shown in the attached fig. 1 and 2, and the top of the upper driving part has a lug extending towards one side of the button 1. So set up, can transmit vertical power between button 1 and the ejector pin subassembly for the pressure that button 1 was pushed down transmits to the ejector pin subassembly on, thereby ensures that first eccentric wheel 11 breaks away from mutually with second eccentric wheel 15, and then accomplishes the eccentric process of take-up.
The invention provides a sewing machine with a thread take-up eccentric device, which comprises the thread take-up eccentric device described in the specific embodiment; other parts of the sewing machine can be referred to the prior art and are not expanded herein.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The sewing machine and the thread take-up eccentric device thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A thread take-up eccentric device for a sewing machine, comprising a rotatable upper shaft (16), characterized in that,
the device also comprises a first eccentric wheel (11) fixed on the upper shaft (16), and the first eccentric wheel (11) is fixed along the axial direction of the upper shaft (16);
the outer side wall of the first eccentric wheel (11) is rotatably sleeved with a take-up connecting rod (14) and a second eccentric wheel (15), the side wall of the first eccentric wheel (11) is provided with an elastic clamping part which can stretch out and draw back along the radial direction, and the side wall of the second eccentric wheel (15) is provided with two clamping grooves which are separated by 180 degrees and can be respectively clamped and matched with the elastic clamping part;
the ejector rod component is in contact with the elastic clamping part and can separate the elastic clamping part from the clamping groove;
when the thread picking amount is adjusted, the ejector rod assembly abuts against the elastic clamping portion, the elastic clamping portion is separated from one clamping groove, the upper shaft (16) and the first eccentric wheel (11) are synchronously rotated, the thread picking connecting rod (14) and the second eccentric wheel (15) are fixed, the elastic clamping portion rotates relative to the second eccentric wheel (15) to the other clamping groove, and the position of the rotation axis of the upper shaft (16) relative to the matching center line of the thread picking connecting rod (14) and the second eccentric wheel (15) is changed;
the elastic clamping part comprises:
the spring (13) is positioned in a limiting groove of the first eccentric wheel (11) and can stretch and contract along the radial direction of the upper shaft (16); the limiting groove of the first eccentric wheel (11) limits the circumferential displacement of the spring (13);
and the limiting pin block (12) is positioned at the top of the spring (13), and the limiting pin block (12) can be alternatively clamped in the two clamping grooves.
2. The thread take-up eccentric according to claim 1, characterized in that the upper shaft (16) is further sheathed with a spacer (17) and a counterweight (18) for limiting the axial displacement of the second eccentric (15).
3. The thread take-up eccentric according to claim 2, characterized in that the thread take-up connecting rod (14) and the spacer (17) are respectively located on both axial sides of the second eccentric (15), and the balance weight (18) is in close fit with the spacer (17).
4. The thread take-up eccentric according to any one of claims 1 to 3, wherein the carrier rod assembly comprises:
a vertically arranged drive rod (8); the driving rod (8) comprises a main body part with a smaller section size, an upper driving part and a lower driving part which are positioned at the upper end and the lower end of the main body part and have a larger section size, and the bottom end of the lower driving part can be abutted against the elastic clamping part;
the driving spring (9) is sleeved on the periphery of the main body part, and the top end of the driving spring (9) is abutted against the bottom end of the upper driving part; the bottom end of the driving spring (9) is propped against the oil receiving disc (4); and the limiting clamp spring (10) is fixed on the driving rod (8) and used for limiting the axial position of the driving spring (9).
5. The thread take-up eccentric according to claim 4, characterized in that it further comprises a push button (1) located above the driving rod (8) for vertical movement of the driving rod (8), the push button (1) being connected with a return spring (2) for returning the push button (1).
6. The thread take-up eccentric according to claim 5, characterized in that the button (1) has an end face which can be abutted against the top end of the upper drive part, and the end face of the button (1) is provided with a snap spring (3) which is fixed in position relative to the button (1); the button (1) is provided with an accommodating groove for accommodating the return spring (2), the top end of the return spring (2) abuts against the accommodating groove, and the bottom end of the return spring (2) abuts against a notch of the upper cover (6).
7. The thread take-up eccentric according to claim 6, characterized in that there is an offset between the vertical axis of movement of the push button (1) and the vertical axis of movement of the upper drive.
8. The thread take-up eccentric according to claim 7, characterized in that the top of the upper driving part has a lug extending in a direction to one side of the button (1).
9. A sewing machine characterized by comprising the thread take-up eccentric according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173128.8A CN107761271B (en) | 2017-11-22 | 2017-11-22 | Sewing machine and take-up eccentric device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173128.8A CN107761271B (en) | 2017-11-22 | 2017-11-22 | Sewing machine and take-up eccentric device thereof |
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| Publication Number | Publication Date |
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| CN107761271A CN107761271A (en) | 2018-03-06 |
| CN107761271B true CN107761271B (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711173128.8A Active CN107761271B (en) | 2017-11-22 | 2017-11-22 | Sewing machine and take-up eccentric device thereof |
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| CN (1) | CN107761271B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110952233B (en) * | 2019-12-12 | 2021-06-04 | 东莞理工学院 | Simple adjusting device of thread take-up mechanism of industrial sewing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119892A (en) * | 1988-10-28 | 1990-05-07 | Juki Corp | Movement adjusting device for thread take-up lever |
| CN1094768A (en) * | 1994-02-08 | 1994-11-09 | 周鹤鸣 | A kind of five lever take-up mechanisms of the confession regulated line amount of use in sewing machine |
| CN1170093A (en) * | 1996-05-13 | 1998-01-14 | 兄弟工业株式会社 | Adjusting device of eccentricity of eccentric wheel apparatus |
| CN103147237A (en) * | 2013-03-20 | 2013-06-12 | 新杰克缝纫机股份有限公司 | Eccentric pin for take-up lever |
| CN107099947A (en) * | 2017-04-27 | 2017-08-29 | 杰克缝纫机股份有限公司 | A kind of take-up lever stroke adjustable structure and sewing machine |
-
2017
- 2017-11-22 CN CN201711173128.8A patent/CN107761271B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119892A (en) * | 1988-10-28 | 1990-05-07 | Juki Corp | Movement adjusting device for thread take-up lever |
| CN1094768A (en) * | 1994-02-08 | 1994-11-09 | 周鹤鸣 | A kind of five lever take-up mechanisms of the confession regulated line amount of use in sewing machine |
| CN1170093A (en) * | 1996-05-13 | 1998-01-14 | 兄弟工业株式会社 | Adjusting device of eccentricity of eccentric wheel apparatus |
| CN103147237A (en) * | 2013-03-20 | 2013-06-12 | 新杰克缝纫机股份有限公司 | Eccentric pin for take-up lever |
| CN107099947A (en) * | 2017-04-27 | 2017-08-29 | 杰克缝纫机股份有限公司 | A kind of take-up lever stroke adjustable structure and sewing machine |
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| CN107761271A (en) | 2018-03-06 |
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