CN203451815U - Cam in wire cutting mechanism for sewing machines - Google Patents
Cam in wire cutting mechanism for sewing machines Download PDFInfo
- Publication number
- CN203451815U CN203451815U CN201320590999.0U CN201320590999U CN203451815U CN 203451815 U CN203451815 U CN 203451815U CN 201320590999 U CN201320590999 U CN 201320590999U CN 203451815 U CN203451815 U CN 203451815U
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- Prior art keywords
- cam
- cutting mechanism
- trimming
- thread cutting
- sewing machine
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Abstract
The utility model provides a cam in a wire cutting mechanism for sewing machines, which belongs to the technical field of parts manufacturing for sewing machines, and solves the problems that a cam in an existing wire cutting mechanism for sewing machines is long in wire cutting period, low in work efficiency, and the like. The cam in a wire cutting mechanism for sewing machines comprises a disc-shaped wheel body, the side part of the wheel body is provided with an annularly concave cam groove, and the cam groove is formed by the head-to-tail connection of multiple curved grooves which are same in curve and uniformly distributed by taking the center of the cam as a reference. The cam in a wire cutting mechanism for sewing machines has the advantages of short wire-cutting waiting time, high wire-cutting working efficiency, and the like.
Description
Technical field
The utility model belongs to sewing machine component manufacturing technology field, relates to the cam in a kind of cam of Sewing machines, particularly a kind of thread cutting mechanism of sewing machine.
Background technology
In existing technology, Sewing machines is all with automatic shearing mechanism, and thread cutting mechanism carries out separated time, trimming to sewing thread (bottom line, upper thread).
The for example trimming of the applicant of this patent in 2009 application Sewing machiness, the patent of lifting pressure, linear-sweeping drive mechanism, [application number 200910096841.6; Publication number: CN101519834A], it is arranged in the frame of Sewing machines, this mechanism comprises trimming cam and trimming crank, trimming cam with can drive the power section two of its rotation to be connected, trimming crank is hinged in frame, and one end of trimming crank and trimming connecting rod are hinged, the other end of trimming crank is provided with and can makes the trimming crank other end be resisted against all the time the contact structures two on trimming cam.
As shown in Figure 1, this kind of trimming cam mechanism is that power section two drives trimming cam, make the rotation of trimming cam, contact mechanism two is the cannelure consistent with trimming cam contour, trimming cam is positioned at cannelure, and the sidewall of trimming cam is all consistent to the distance between the sidewall of corresponding cannelure, the other end of trimming crank is roller, roller is positioned at cannelure, and be resisted against respectively on the sidewall of trimming cam and cannelure, on trimming cam, only there is a V-shaped trimming driver slot, every rotation 360 degree of drive part two actuator trimming cam, the relative trimming cam of roller moves in trimming driver slot, cross v-depression, by trimming crank, drive trimming connecting rod, the final trimming moving knife that drives is realized separated time one time, the action of trimming, trimming moving knife is got back to the initial position for the treatment of separated time.And roller such as moves at the groove end of radius, just arrived the initial position for the treatment of separated time, so roller sky has been walked one section of longer stroke, sky has been walked one period of long period, the time cycle that each trimming need to be longer, operating efficiency is lower.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, and the cam in a kind of thread cutting mechanism of sewing machine is provided, and this cam can improve the operating efficiency of thread cutting mechanism in Sewing machines.
The purpose of this utility model can realize by following technical proposal: the cam in a kind of thread cutting mechanism of sewing machine, this cam comprises a wheel body in the form of annular discs, it is characterized in that, described wheel body sidepiece has recessed ringwise cam path, and described cam path is formed by connecting from beginning to end by take the curved groove of cam center as some sections of uniform same curve of benchmark.
Cam path is formed by connecting from beginning to end by some sections of curved grooves, roller is positioned at cam path, roller is often crossed the action that a curved groove realizes separated time, trimming, be 360 ° of the every rotations of cam, this cam can be realized separated time repeatedly, the action of trimming, need the time of wait shorter, the cycle of trimming is shorter, and the operating efficiency of trimming is higher.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, place, the cam path of described cam bottom has sewage draining exit.Sewing machines can add certain lubricating oil in cam path when work, after solidifying, lubricating oil can have influence on the normal rotation of roller in cam path, sewage draining exit is discharged lubricating oil unnecessary, that solidify from cam path, make roller can be in cam path normal rotation, long service life.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, the quantity of described curved groove is 3-5 roads.The quantity of curved groove is determined according to actual conditions.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, the quantity of described curved groove is 3 roads.The equidistant 120 ° of settings of 3 road curved grooves, the frequent degree that roller is beated is reasonable, reasonable in design.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, described curved groove is V-shaped, and the V-arrangement of curved groove bottom seamlessly transits.When cam rotates, this kind of structure can not hinder roller along the normal movement of cam path, and cam, roller move smooth and easy, thread cutting mechanism working stability.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, the angle of described curved groove is obtuse angle.Obtuse angle just can make roller better along cam path, move, reasonable in design.
In cam in above-mentioned a kind of thread cutting mechanism of sewing machine, between described adjacent two curved grooves, seamlessly transit.Seamlessly transit and be conducive to roller and normally move along cam path, roller moves smooth and easy, failure rate is low, long service life.
Compared with prior art, cam in the thread cutting mechanism of sewing machine that the utility model provides, the recessed cam path ringwise that its sidepiece has is to be formed by level and smooth being connected of multiple tracks curved groove head and the tail, roller is often crossed the action that one curved groove just realized separated time, trimming, rotate a circle after 360 °, use this cam can realize repeatedly separated time, trimming, the stand-by period while reducing trimming, the operating efficiency of raising trimming.
Accompanying drawing explanation
Fig. 1 is the thread cutting mechanism of sewing machine of prior art and the structural representation of cam.
Fig. 2 is the structural representation of this thread cutting mechanism of sewing machine and cam.
Fig. 3 is the overall structure schematic diagram of this cam.
In figure, 1, cam; 1a, wheel body; 1b, cam path; 1b1, curved groove; 1c, sewage draining exit; 2, trimming crank; 3, trimming pull bar; 4, trimming moving knife; 5, roller.
The specific embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As shown in Figure 1, 2, the thread cutting mechanism of Sewing machines comprises motor, cam 1, trimming crank 2, trimming pull bar 3 and trimming moving knife 4.
The main shaft of motor is connected mutually with the center of cam 1, and one end of trimming crank 2 is hinged in frame, and one end of the other end and trimming pull bar 3 is hinged, and the middle part of trimming crank 2 has roller 5, and the other end of trimming pull bar 3 and trimming moving knife 4 are hinged.
As shown in Figure 2,3, cam 1 comprises a wheel body 1a in the form of annular discs, the sidepiece of wheel body 1a has ringwise recessed cam path 1b, the bottom of cam path 1b has a sewage draining exit 1c who runs through cam path 1b bottom, in the present embodiment, cam path 1b is formed by connecting from beginning to end by take the curved groove 1b1 of cam 1 center as 3 uniform road same curve of benchmark, between two adjacent curved groove 1b1, seamlessly transits, when Practical manufacturing, the quantity of curved groove 1b1 can be made four roads or five roads.Curved groove 1b1 is V-shaped, and seamlessly transits bottom the V-arrangement of curved groove 1b1, and the angle of curved groove is obtuse angle.Roller 5 is positioned at cam path 1b, and the two side of the lateral wall of roller 5 and cam path 1b fits, and roller 5 moves along cam path 1b relative to cam 1.
Motor is opened, 1 rotation of electric machine main shaft band moving cam, roller 5 moves along cam path 1b relative to cam 1, when cam 1 rotates 120 °, be that roller 5 is while crossing one curved groove 1b1, by trimming crank 2, drive trimming pull bar 3, final trimming moving knife 4 is realized separated time, a trimming and is moved, the every rotation of cam 1 one week, can realize three separated times, trimmings and move, in twice adjacent separated time, trimming action, 5 skies of roller have been walked one section of very short stroke, sky has been walked one very short period, and this thread cutting mechanism trimming efficiency is high.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although more used the terms such as cam 1, wheel body 1a, cam path 1b, curved groove 1b1, sewage draining exit 1c, trimming crank 2, trimming pull bar 3, trimming moving knife 4, roller 5 herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.
Claims (7)
1. the cam in a thread cutting mechanism of sewing machine, this cam (1) comprises a wheel body (1a) in the form of annular discs, it is characterized in that, described wheel body (1a) sidepiece has recessed ringwise cam path (1b), and described cam path (1b) is formed by connecting by take curved groove (1b1) head and the tail that cam (1) center is some sections of uniform same curve of benchmark.
2. the cam in a kind of thread cutting mechanism of sewing machine according to claim 1, is characterized in that, the place, cam path (1b) bottom of described cam (1) has sewage draining exit (1c).
3. the cam in a kind of thread cutting mechanism of sewing machine according to claim 2, is characterized in that, the quantity of described curved groove (1b1) is 3-5 roads.
4. the cam in a kind of thread cutting mechanism of sewing machine according to claim 3, is characterized in that, the quantity of described curved groove (1b1) is 3 roads.
5. according to the cam in a kind of thread cutting mechanism of sewing machine described in claim 1 or 2 or 3 or 4, it is characterized in that, (1b1) is V-shaped for described curved groove, and the V-arrangement of curved groove (1b1) bottom seamlessly transits.
6. the cam in a kind of thread cutting mechanism of sewing machine according to claim 5, the angle of described curved groove is obtuse angle.
7. according to the cam in a kind of thread cutting mechanism of sewing machine described in claim 1 or 2 or 3 or 4, it is characterized in that, between described adjacent two curved grooves (1b1), seamlessly transit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590999.0U CN203451815U (en) | 2013-09-23 | 2013-09-23 | Cam in wire cutting mechanism for sewing machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590999.0U CN203451815U (en) | 2013-09-23 | 2013-09-23 | Cam in wire cutting mechanism for sewing machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203451815U true CN203451815U (en) | 2014-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320590999.0U Expired - Lifetime CN203451815U (en) | 2013-09-23 | 2013-09-23 | Cam in wire cutting mechanism for sewing machines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203451815U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835527A (en) * | 2017-04-01 | 2017-06-13 | 杰克缝纫机股份有限公司 | A kind of sewing machine automatic shearing mechanism and sewing machine |
| CN106948103A (en) * | 2017-04-01 | 2017-07-14 | 杰克缝纫机股份有限公司 | A kind of thread shearing device of sewing machine and sewing machine |
-
2013
- 2013-09-23 CN CN201320590999.0U patent/CN203451815U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835527A (en) * | 2017-04-01 | 2017-06-13 | 杰克缝纫机股份有限公司 | A kind of sewing machine automatic shearing mechanism and sewing machine |
| CN106948103A (en) * | 2017-04-01 | 2017-07-14 | 杰克缝纫机股份有限公司 | A kind of thread shearing device of sewing machine and sewing machine |
| CN106835527B (en) * | 2017-04-01 | 2019-05-07 | 杰克缝纫机股份有限公司 | A kind of sewing machine automatic shearing mechanism and sewing machine |
| CN106948103B (en) * | 2017-04-01 | 2019-12-17 | 杰克缝纫机股份有限公司 | Thread trimming device of sewing machine and sewing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG ZOJE SEWING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHONGJIE SEWING MACHINE CO., LTD. Effective date: 20140930 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140930 Address after: 317604 Yuhuan County barley island Subdistrict Office, Zhejiang, Taizhou Patentee after: ZOJE SEWING MACHINE Co.,Ltd. Address before: 317604 Yuhuan County barley island Subdistrict Office, Zhejiang, Taizhou Patentee before: Zhongjie Sewing Machine Co.,Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160913 Address after: 317604 Taizhou Province, Yuhuan County, Lantau Island Road, Hing Hong Kong Road, No. 198 Patentee after: ZOJE SEWING MACHINE Co.,Ltd. Patentee after: ZHEJIANG JOYEE SEWING MACHINE CO.,LTD. Patentee after: ZHEJIANG BSM SEWING MACHINE CO.,LTD. Address before: 317604 Yuhuan County barley island Subdistrict Office, Zhejiang, Taizhou Patentee before: ZOJE SEWING MACHINE Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20201010 Address after: 198 Xinggang East Road, Damaiyu street, Yuhuan City, Taizhou City, Zhejiang Province Patentee after: ZOJE SEWING MACHINE Co.,Ltd. Address before: 317604, Taizhou, Zhejiang province Yuhuan County barley island Street Hing Tung Road, No. 198 Patentee before: ZOJE SEWING MACHINE Co.,Ltd. Patentee before: ZHEJIANG JOYEE SEWING MACHINE Co.,Ltd. Patentee before: ZHEJIANG BSM SEWING MACHINE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |
|
| CX01 | Expiry of patent term |