CN209243336U - A kind of the trimming cam and automatic shearing mechanism of sewing machine - Google Patents
A kind of the trimming cam and automatic shearing mechanism of sewing machine Download PDFInfo
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- CN209243336U CN209243336U CN201822016824.4U CN201822016824U CN209243336U CN 209243336 U CN209243336 U CN 209243336U CN 201822016824 U CN201822016824 U CN 201822016824U CN 209243336 U CN209243336 U CN 209243336U
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Abstract
The utility model belongs to sewing device technical field, is related to the trimming cam and automatic shearing mechanism of a kind of sewing machine, and which solve the technical problems such as existing trimming cam cutting is at high cost.This trimming cam includes trimming body and forces back cutter hub, forces back to force back the outer peripheral surface of cutter hub with forcing back knife section in the fixed part on lower shaft of sewing machine with being capable of fixing on cutter hub；Trimming body, which is fixed on, to be forced back on cutter hub, and the outer peripheral surface of the trimming body has trimming section.This automatic shearing mechanism includes shear spool, trimming driving crank, forces back knife crank and above-mentioned trimming cam, trimming drives crank and knife crank is forced back to be sheathed on shear spool, the end of trimming driving crank can mutually recline with the trimming section on trimming body, and be moved to trimming terminal point by trimming starting point；It forces back knife crank that can return knife section with the pressure forced back on cutter hub mutually to recline.The utility model has the advantages that processing cost is low etc..
Description
Technical field
The utility model belongs to sewing device technical field, is related to the trimming cam and automatic thread trimmer of a kind of sewing machine
Structure.
Background technique
In the thread cutting mechanism of existing sewing machine, trimming component needs to realize following functions: trimming position and non-trimming position
Handoff functionality, forced resetting function etc..
A kind of automatic shearing mechanism and sewing machine as disclosed in 106868735 A of China patent CN, including rotatable support
Lower axle in baseplate of sewing machine, the trimming cam being fixed in lower axle, the moving knife component that can be swung around lower axle, on moving knife component
With at least one moving knife, further include the shear spool parallel with lower axle, be mounted on shear spool one end trimming cam crank,
And it is fixed on the trimming crank of the shear spool other end, ball is connected on trimming cam crank, trimming crank passes through driving machine
Structure is connected with moving knife component；When trimming, the trimming cam contour of ball and trimming cam periphery is matched, and trimming cam is bent
Handle, shear spool and trimming crank synchronous hunting drive moving knife swing to be engaged with stationary knife, realize trimming.
But the trimming cam that can be seen that existing sewing machine from its Figure of description Fig. 5 is divided into three parts, is located in the middle
Fixed part, and positioned at fixed part two sides wire shear part and forces go back to knife portion, and wire shear part with force back knife portion by multistage camber line
Or straight line is constituted, therefore required precision and processing cost are higher.
Utility model content
The purpose of this utility model is the presence of the above problem in view of the prior art, and the trimming for proposing a kind of sewing machine is convex
Wheel, the technical problem to be solved by the utility model is to how to reduce the processing cost of this trimming cam.
The purpose of this utility model can be realized by the following technical scheme:
A kind of trimming cam of sewing machine, which is characterized in that the trimming cam includes trimming body and forces back cutter hub, institute
It states to force back to have on cutter hub and be capable of fixing in the fixed part on lower shaft of sewing machine, the outer peripheral surface for forcing back cutter hub has strong
Make back knife section；The trimming body, which is fixed on, to be forced back on cutter hub, and the outer peripheral surface of the trimming body has trimming section.
Its working principles are as follows: this trimming cam is when in use, crank can be driven to match with the trimming on shear spool, under
Axis rotation, which can drive, forces back cutter hub to rotate, and then drives the rotation of trimming body, and drives crank handle turns shear spool pendulum by trimming
It is dynamic to realize trimming；And when clamping stagnation, which occurs, in shear spool to be resetted, force back the pressure on cutter hub to be returned on knife Duan Huiyu shear spool
Pressure return knife crank mutually recline, drive shear spool swing realize reset.Since the trimming cam in the application only includes trimming
Body and forces back cutter hub, and fixed part is designed at and is forced back on cutter hub, compared with prior art, is not necessarily in wire shear part and pressure
The part for individually adding a fixed part between knife portion is returned, effectively saving cost of parts, and then reduces adding for entire trimming cam
Work cost.
In a kind of trimming cam of above-mentioned sewing machine, the trimming body and cutter hub is forced back to be an integral structure, institute
Stating trimming cam further includes through trimming body and the through-hole for forcing back cutter hub.
In a kind of trimming cam of above-mentioned sewing machine, the center of gravity of the trimming cam is located in the through-hole.
In a kind of trimming cam of above-mentioned sewing machine, the trimming section includes trimming starting point between trimming terminal
Curved surface, the outer peripheral surface of the trimming body also have non-trimming section and trimming driving crank positioning section, and the trimming driving crank is fixed
Position section is located between trimming starting point and non-trimming section and towards through-hole direction indent.Design has trimming to drive crank positioning section
Afterwards, facilitate the positioning in trimming driving crank circumferential direction, and its profile is designed as concave, the end of trimming crank when facilitating trimming
Portion slides to trimming starting point by trimming crank positioning section, finally slides into trimming terminal point, realizes trimming.
In a kind of trimming cam of above-mentioned sewing machine, point in the non-trimming section and trimming crank positioning section is to logical
The distance of hole the center point is respectively less than distance of the point at through hole center in trimming section.
In a kind of trimming cam of above-mentioned sewing machine, the outer peripheral surface for forcing back cutter hub also has optional time knife
Section, the distance between point in the optional time knife section to through hole center be less than force back point in knife section to through hole center it
Between distance.
In a kind of trimming cam of above-mentioned sewing machine, the fixed part includes being opened in the optional time knife section
Threaded hole, the threaded hole is connected with through-hole, and the fastener that can extend in through-hole is also plugged in the threaded hole.
Lower axle can be passed through through-hole, then screw in fastener in through-hole, fixed until matching realization with lower axle；And by via design
In in optional time knife section, it will not influence and force back knife.
In a kind of trimming cam of above-mentioned sewing machine, there are two the threaded holes, the inner end of two threaded holes with
Through-hole connection and shape is in an angle.The company forced go back between cutter hub and lower axle can be improved there are two after threaded hole in design
Connect stability.
In a kind of trimming cam of above-mentioned sewing machine, the trimming section and to force back knife section be smooth surface.It will
Trimming section and knife section is forced back to be designed as smooth surface, it is ensured that trimming drives crank and knife crank is forced back to be relatively sliding
When it is more smoothly.
A kind of automatic shearing mechanism of sewing machine, which is characterized in that the automatic shearing mechanism includes shear spool, trimming drive
Dynamic crank forces back knife crank and above-mentioned trimming cam, and the trimming drives crank and knife crank is forced back to be sheathed on
On shear spool, the end of the trimming driving crank can mutually recline with the trimming section on the trimming body, and by trimming starting point
Place is moved to trimming terminal point；It is described to force back knife crank that mutually recline with the pressure forced back on cutter hub time knife section.
Compared with prior art, the utility model has the advantage that
Trimming cam in the application only includes trimming body and forces back cutter hub, and fixed part is designed at and forces back cutter hub
On, compared with prior art, without in wire shear part and forcing back the part for individually adding a fixed part between knife portion, effectively save
Cost of parts is saved, and then reduces the processing cost of entire trimming cam.
Detailed description of the invention
Fig. 1 is the axonometric drawing of this trimming cam.
Fig. 2 is the main view of this trimming cam.
Fig. 3 is the sectional view that cutter hub is returned in this pressure.
Fig. 4 is the structural schematic diagram of this automatic shearing mechanism.
In figure, 1, trimming body；2, cutter hub is forced back；3, fixed part；4, knife section is forced back；5, trimming section；6, through-hole；7, it cuts
Line starting point；8, non-trimming section；9, trimming drives crank positioning section；10, optional time knife section；11, threaded hole；12, trimming drives
Crank；13, knife crank is forced back；14, trimming terminal.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, Figure 2, Figure 3 shows, this trimming cam includes trimming body 1 and forces back cutter hub 2, forces back to have on cutter hub 2
Have and is capable of fixing in the fixed part 3 on lower shaft of sewing machine.In the present embodiment, trimming body 1 and force back cutter hub 2 for integral type knot
Structure as other schemes, by trimming body 1 and can also force back cutter hub 2 to be designed as split type structure, the two passes through fastening certainly
The modes such as part or welding realize fixation.
Preferably, the fixation in order to realize this trimming cam, trimming cam further includes through trimming body 1 and forcing back knife
The lower axle of the through-hole 6 of body 2, sewing machine passes through the through-hole 6, and the center of gravity of trimming cam is located in through-hole 6.Fixed part 3 includes opening up
In forcing back the threaded hole 11 on cutter hub 2, threaded hole 11 is connected with through-hole 6, and being also plugged in threaded hole 11 can extend to
Fastener in through-hole 6.In the present embodiment, there are two threaded holes 11, and the inner end of two threaded holes 11 is connected to through-hole 6 and shape
In an angle.Fastener can be designed as screw etc..Fixation between screw and lower axle can both be realized by pressure, be gone back
Mounting hole compatible with the screw can be opened up in lower axle to realize.As other schemes, threaded hole 11 can also be designed as
Pin hole, anchor design are connecting pin.The shape in hole can also be not limited to circle, as square groove can also.
As shown in Figure 1, Figure 2, Figure 3 shows, it forces back the outer peripheral surface of cutter hub 2 to have and forces back knife section 4 and optional time knife section 10,
In the present embodiment, forcing back knife section 4 is preferably smooth curved surface, and the shape of optional time knife section 10 is not limited, and is only needed
Point in optional time knife section 10 is less than to the distance between 6 center of circle of through-hole forces back the point in knife section 4 between 6 center of circle of through-hole
Distance.In order to not influence normally knife is forced back, threaded hole 11 is opened in optional time knife section 10.
As shown in Figure 1, Figure 2, Figure 3 shows, trimming body 1, which is fixed on, forces back on cutter hub 2, and the outer peripheral surface of the trimming body 1 has
Trimming section 5, trimming section 5 are preferably smooth surface.Trimming section 5 includes trimming starting point 7 to the curved surface between trimming terminal 14, trimming
The outer peripheral surface of body 1 also has non-trimming section 8 and trimming driving crank positioning section 9, and trimming drives crank positioning section 9 to rise positioned at trimming
Between point 7 and non-trimming section 8 and towards 6 direction indent of through-hole.Point in non-trimming section 8 and trimming crank positioning section is round to through-hole 6
Distance at the heart is respectively less than the point in trimming section 5 to the distance of 6 the center point of through-hole.
The utility model additionally provides a kind of automatic shearing mechanism of sewing machine, the automatic shearing mechanism include shear spool,
Trimming driving crank 12 forces back knife crank 13 and trimming cam as described above, and trimming drives crank 12 and forces back knife
Crank 13 is sheathed on shear spool, and the end of trimming driving crank 12 can recline with 5 phase of trimming section on trimming body 1, and
It is moved at trimming terminal 14 by trimming starting point 7；Force back knife crank 13 that can return knife section with the pressure forced back on cutter hub 2
4 phases recline.
1, trimming body；2, cutter hub is forced back；3, fixed part；4, knife section is forced back；5, trimming section；6, through-hole；7, trimming rises
Point；8, non-trimming section；9, trimming drives crank positioning section；10, optional time knife section；11, threaded hole；12, trimming drives crank；
13, knife crank is forced back；14, trimming terminal.
The working principle of the utility model is as follows: when trimming, lower axle rotation, which drives, forces back cutter hub 2 to rotate, and then drives
Trimming body 1 rotates, and the trimming section 5 on trimming body 1 and the end of trimming driving crank 12 mutually recline, and drives crank 12 by trimming
It drives shear spool to swing and realizes trimming；And when clamping stagnation, which occurs, in shear spool to be resetted, force back the pressure on cutter hub 2 to return knife section
4, which can return 13 phase of knife crank with the pressure on shear spool, reclines, and drives shear spool to swing realization and resets.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (10)
1. a kind of trimming cam of sewing machine, which is characterized in that the trimming cam includes trimming body (1) and forces back cutter hub
(2), it is described force back on cutter hub (2) have be capable of fixing in the fixed part (3) on lower shaft of sewing machine, it is described to force back cutter hub
(2) outer peripheral surface, which has, forces go back to knife section (4)；The trimming body (1), which is fixed on, forces back on cutter hub (2), and the trimming body (1)
Outer peripheral surface have trimming section (5).
2. the trimming cam of sewing machine according to claim 1, which is characterized in that the trimming body (1) and force back knife
Body (2) is an integral structure, and the trimming cam further includes the through-hole (6) for running through trimming body (1) and forcing go back to cutter hub (2).
3. the trimming cam of sewing machine according to claim 2, which is characterized in that the center of gravity of the trimming cam is located at institute
It states in through-hole (6).
4. the trimming cam of sewing machine according to claim 2, which is characterized in that the trimming section (5) includes that trimming rises
To the curved surface between trimming terminal (14), also there is the outer peripheral surface of the trimming body (1) point (7) non-trimming section (8) and trimming to drive
Dynamic crank positioning section (9), trimming driving crank positioning section (9) is located between trimming starting point (7) and non-trimming section (8) and court
Through-hole (6) direction indent.
5. the trimming cam of sewing machine according to claim 4, which is characterized in that the non-trimming section (8) and trimming are bent
The distance of point to through-hole (6) the center point on handle positioning section be respectively less than the point on trimming section (5) to through-hole (6) the center point away from
From.
6. according to the trimming cam of sewing machine described in Claims 2 or 3 or 4 or 5, which is characterized in that described to force back cutter hub
(2) outer peripheral surface also has optional time knife section (10), and the point on the optional time knife section (10) is between through-hole (6) center of circle
Distance be less than and force back point on knife section (4) the distance between to through-hole (6) center of circle.
7. the trimming cam of sewing machine according to claim 6, which is characterized in that the fixed part (3) includes being opened in
Threaded hole (11) on the optional time knife section (10), the threaded hole (11) are connected with through-hole (6), the threaded hole
(11) fastener that can extend in through-hole (6) is also plugged in.
8. the trimming cam of sewing machine according to claim 7, which is characterized in that there are two the threaded holes (11), and two
The inner end of a threaded hole (11) be connected to the through-hole (6) and shape in an angle.
9. the trimming cam of sewing machine described according to claim 1 or 2 or 3 or 4 or 5, which is characterized in that the trimming section
(5) and to force back knife section (4) be smooth surface.
10. a kind of automatic shearing mechanism of sewing machine, which is characterized in that the automatic shearing mechanism includes shear spool, trimming drive
Dynamic crank (12), knife crank (13) and trimming cam as described in any one of claims 1-9 are forced back, the trimming drives
Dynamic crank (12) and knife crank (13) is forced back to be sheathed on shear spool, the trimming drives the end of crank (12) can be with
Trimming section (5) on the trimming body (1) mutually reclines, and is moved at trimming terminal (14) by trimming starting point (7)；It is described strong
Making back knife crank (13) can mutually recline with the pressure forced back on cutter hub (2) time knife section (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822016824.4U CN209243336U (en) | 2018-12-03 | 2018-12-03 | A kind of the trimming cam and automatic shearing mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822016824.4U CN209243336U (en) | 2018-12-03 | 2018-12-03 | A kind of the trimming cam and automatic shearing mechanism of sewing machine |
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| Publication Number | Publication Date |
|---|---|
| CN209243336U true CN209243336U (en) | 2019-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822016824.4U Active CN209243336U (en) | 2018-12-03 | 2018-12-03 | A kind of the trimming cam and automatic shearing mechanism of sewing machine |
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| CN (1) | CN209243336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064222A (en) * | 2020-10-16 | 2020-12-11 | 杰克缝纫机股份有限公司 | Sewing machine |
-
2018
- 2018-12-03 CN CN201822016824.4U patent/CN209243336U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064222A (en) * | 2020-10-16 | 2020-12-11 | 杰克缝纫机股份有限公司 | Sewing machine |
| CN112064222B (en) * | 2020-10-16 | 2022-01-28 | 杰克缝纫机股份有限公司 | Sewing machine |
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Address after: 317502 No.8 Jinxiu Road, Xinhe Town, Wenling City, Taizhou City, Zhejiang Province Patentee after: Meiji Technology Group Co.,Ltd. Address before: 317502 Zhongxiang Industrial Zone, Xinhe Town, Wenling City, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG MAQI SEWING MACHINE Co.,Ltd. |