CN211339931U - Thread trimming and presser foot lifting mechanism of sewing machine - Google Patents
Thread trimming and presser foot lifting mechanism of sewing machine Download PDFInfo
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- CN211339931U CN211339931U CN201921732863.2U CN201921732863U CN211339931U CN 211339931 U CN211339931 U CN 211339931U CN 201921732863 U CN201921732863 U CN 201921732863U CN 211339931 U CN211339931 U CN 211339931U
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- trimming
- presser foot
- foot lifting
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Abstract
The utility model provides a presser foot mechanism is lifted to sewing machine's trimming, including step motor, a housing, the trimming connecting rod axle, trimming drive shaft and trimming subassembly, the trimming cam is installed to step motor left side axle head, install trimming axle sleeve and trimming connecting rod axle sleeve on the casing, the trimming drive shaft is worn to be equipped with on the trimming axle sleeve, the trimming subassembly is installed to the left end of trimming drive shaft, the trimming connecting rod axle is worn to be equipped with on the trimming connecting rod axle sleeve, the trimming connecting rod is installed to the right side outer end of trimming connecting rod axle, and it is articulated through first trimming connecting rod axle position screw, first roller is installed in first trimming connecting rod axle position screw outside, the other end and the trimming drive shaft end connection of trimming connecting rod, compared with the prior art, the utility model discloses following beneficial effect has: the action of trimming and lifting the presser foot is independently completed by adopting one stepping motor, the product cost is reduced, the operation of the stepping motor is controlled by an electric control program, and the workload of personnel is reduced.
Description
Technical Field
The utility model discloses a presser foot mechanism is lifted to sewing machine's trimming belongs to sewing machine technical field.
Background
In the prior art, in the thread trimming drive of a sewing machine, an electromagnet drives a thread trimming cam crank assembly to translate, so that a cylindrical surface of a roller on a thread trimming cam crank is in contact with a surface on a thread trimming cam, the cam is mounted and fixed on a lower shaft and drives the lower shaft to drive the cam, then the cam drives the thread trimming cam crank to rotate through the roller, and the thread trimming crank drives a thread trimming drive crank shaft on the thread trimming assembly, so that the thread trimming assembly completes thread trimming. The existing thread cutting technology of the sewing machine has the defects of high noise, unstable thread cutting effect and large vibration by triggering thread cutting action through an electromagnet.
In the prior art, the presser foot lifting mode is mainly that the electromagnet controls the presser foot to lift or descend, or the presser foot is controlled to lift or descend by using a knee rest against the knee of a person, the electromagnet drive has the defects that the height of the presser foot is not adjustable, the noise is high, the presser foot lifting mode by using the knee rest against the knee of the person has the defects that the presser foot can be lifted by using a large force, the sewing machine operation of a sewing factory is mainly female, and the mode is relatively laborious in actual operation.
Disclosure of Invention
The utility model aims at providing a sewing machine's trimming lifts presser foot mechanism to solve the problem that provides in the above-mentioned background art, the utility model discloses a step motor can independently accomplish the trimming and lift the action of presser foot, and mutually noninterfere, and two sets of motor of action sharing reduce product cost.
In order to achieve the above purpose, the present invention is realized by the following technical solution: a trimming and presser foot lifting mechanism of a sewing machine comprises a stepping motor, a trimming cam, a trimming connecting rod shaft, a trimming drive shaft, a trimming assembly, a first presser foot lifting crank, a presser foot lifting cam, a second presser foot lifting crank, a presser foot lifting shaft and a presser foot lifting assembly, wherein a left motor mounting bracket and a right motor mounting bracket are respectively mounted at two ends of the stepping motor, the left motor mounting bracket and the right motor mounting bracket are both mounted and fixed on a machine shell, the trimming cam is mounted at the left shaft end of the stepping motor, a trimming shaft sleeve and a trimming connecting rod shaft sleeve are mounted on the machine shell, the trimming drive shaft penetrates through the trimming shaft sleeve, the end surface of the trimming shaft sleeve is abutted against the trimming shaft sleeve, the trimming connecting rod is mounted at the outer end of the trimming shaft, the trimming connecting rod shaft is penetrated through the trimming connecting rod shaft sleeve, the end surface of the trimming connecting rod shaft is abutted against the trimming connecting rod shaft sleeve, and the trimming connecting rod is, the wire cutting mechanism is characterized in that the wire cutting mechanism is hinged through a first wire cutting connecting rod axis position screw, a first roller is installed on the outer side of the first wire cutting connecting rod axis position screw and is installed and positioned through a first nut, the other end of the wire cutting connecting rod is connected with the end portion of a wire cutting driving shaft and is hinged through a second wire cutting connecting rod axis position screw, a wire cutting cam is installed at the shaft end of the left side of the stepping motor, an inner groove of the wire cutting cam is matched with the first roller in a rolling contact mode, and the wire cutting assembly and the presser foot lifting assembly are controlled by an electric control program and are driven to execute by the stepping.
Further, a presser foot lifting support seat is installed on the machine shell, a presser foot lifting shaft is installed on the presser foot lifting support seat, a second presser foot lifting crank is installed on the right side of the presser foot lifting shaft, the second presser foot lifting crank is hinged to the presser foot lifting assembly through a presser foot lifting shaft position screw, a presser foot lifting cam is installed on the left side of the presser foot lifting shaft, a first presser foot lifting crank is installed on the right shaft end of the stepping motor, a second roller is installed on the first presser foot lifting crank and hinged through a shaft position screw, and the second roller is matched with the cam surface of the presser foot lifting cam in a rolling contact mode.
Further, the presser foot cam is of enclosed form.
Further, the presser foot cam is in the form of an opening.
Further, a torsion spring is mounted on the presser foot lifting cam and is mounted between the presser foot lifting cam and the presser foot lifting support seat.
Further, the torsion spring is in a common fixed form.
Further, the torsion spring is in a bolt fixing form.
Further, step motor passes through the wire respectively with encoder and motor position response piece electric connection, the encoder is split type encoder, and the encoder is fixed on right motor installing support right side, motor position response piece is fixed on the axle on step motor right side.
Further, a shaft clamp is installed on the left side of the thread trimming connecting rod shaft.
The utility model has the advantages that: the utility model discloses a presser foot mechanism is lifted to sewing machine's trimming, realized adopting a step motor independently to accomplish the trimming and lift the action of presser foot, and mutual noninterference, motor of two sets of action shares, reduce product cost, and the operation through automatically controlled program control step motor, personnel's work load has been reduced, it is low to have the noise, the trimming is stable, simple structure easily advantages such as installation and debugging, solve prior art and use electromagnet control trimming action mostly, and the artifical big just unadjustable shortcoming of presser foot squelch or electromagnet drive presser foot noise of lifting.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
FIG. 2 is a schematic structural view of a thread trimming cam in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
FIG. 3 is a right view schematically showing a thread trimming cam of the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
fig. 4 is a schematic view of a first thread trimming connecting rod axial position screw in the thread trimming and presser foot lifting mechanism of the sewing machine of the utility model;
FIG. 5 is a schematic view of a shaft position screw in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
FIG. 6 is a schematic view of a torsion spring in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
FIG. 7 is a schematic view of a closed presser foot lifting cam in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
FIG. 8 is a schematic view of an open presser foot cover in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
fig. 9 is a schematic view of another embodiment of the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention;
in the figure: 1-left motor mounting bracket, 2-right motor mounting bracket, 3-stepping motor, 4-trimming cam, 5-trimming shaft sleeve, 6-trimming drive shaft, 7-trimming component, 8-trimming connecting rod shaft, 9-trimming connecting rod shaft sleeve, 10-trimming connecting rod, 11-first trimming connecting rod shaft position screw, 12-first roller, 13-first nut, 14-second trimming connecting rod shaft position screw, 15-presser foot lifting support seat, 16-presser foot lifting shaft, 17-second presser foot lifting crank, 18-presser foot lifting component, 19-presser foot lifting shaft position screw, 20-presser foot lifting cam, 21-torsion spring, 22-first presser foot lifting crank, 23-second roller, 24-shaft position screw, 25-shaft clamp, 26-second nut, 27-encoder, 28-motor position sensing piece.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1 to 8, the present invention provides a technical solution: a trimming and presser foot lifting mechanism of a sewing machine comprises a stepping motor 3, a trimming cam 4, a trimming connecting rod 10, a trimming connecting rod shaft 8, a trimming driving shaft 6, a trimming component 7, a first presser foot lifting crank 22, a presser foot lifting cam 20, a second presser foot lifting crank 17, a presser foot lifting shaft 16 and a presser foot lifting component 18, wherein a left motor mounting bracket 1 and a right motor mounting bracket 2 are respectively mounted at two ends of the stepping motor 3, the left motor mounting bracket 1 and the right motor mounting bracket 2 are both mounted and fixed on a machine shell, the trimming cam 4 is mounted at the left shaft end of the stepping motor 3, a trimming shaft sleeve 5 and a trimming connecting rod shaft sleeve 9 are mounted on the machine shell, the trimming driving shaft 6 penetrates through the trimming shaft sleeve 5, the end face abuts against the trimming shaft sleeve 5, the trimming component 7 is mounted at the left end of the trimming driving shaft 6, the trimming connecting rod shaft sleeve 9 penetrates through the trimming connecting rod shaft 8, and the end face abuts against the trimming connecting rod shaft sleeve 9, a trimming connecting rod 10 is arranged at the outer end of the right side of the trimming connecting rod shaft 8 and is hinged through a first trimming connecting rod shaft position screw 11, a first roller 12 is arranged at the outer side of the first trimming connecting rod shaft position screw 11 and is arranged and positioned through a first nut 13, the other end of the trimming connecting rod 10 is connected with the end part of a trimming driving shaft 6 and is hinged through a second trimming connecting rod shaft position screw 14, a trimming cam 4 is arranged at the left shaft end of the stepping motor 3, an inner groove of the trimming cam 4 is matched with the first roller 12 in a rolling contact manner, the trimming component 7 and the lifting and pressing foot component 18 are controlled by an electric control program and are driven by the stepping motor 3 to execute, the stepping motor 3 rotates forwards to drive the trimming cam 4 to rotate, the trimming cam 4 drives the first roller 12 in the groove to move to drive the trimming connecting rod 10 to move, the trimming connecting rod 10 drives the trimming component 7 to complete trimming action through the trimming driving shaft 6, and the stepping motor 3 returns to the initial position after trimming is completed, the thread trimming cam 4 is driven to rotate to enable the thread trimming assembly 7 to be restored to the initial state, when the stepping motor 3 drives the thread trimming to act, the first presser foot lifting crank 22 and the second presser foot lifting cam 20 at the right end of the stepping motor 3 are in a separated state, the presser foot lifting does not act, when the stepping motor 3 drives the presser foot lifting to act, the first roller 12 at the left end of the stepping motor 3 is located in a position area where the thread trimming cam 4 does not change, the thread trimming does not act, the operation is simple, the use effect is good, the stepping motor 3 can independently complete the actions of thread trimming and presser foot lifting, the actions do not interfere with each other, the two sets of actions share one motor, the product cost is reduced, the stepping motor is adopted for driving, and the thread trimming device has the advantages of low noise, stable thread trimming, simple structure, easiness.
A presser foot lifting support seat 15 is arranged on the machine shell, a presser foot lifting shaft 16 is arranged on the presser foot lifting support seat 15, a second presser foot lifting crank 17 is arranged on the right side of the presser foot lifting shaft 16, the second presser foot lifting crank 17 is hinged with a presser foot lifting assembly 18 through a presser foot lifting shaft axis position screw 19, a presser foot lifting cam 20 is arranged on the left side of the presser foot lifting shaft 16, a first presser foot lifting crank 22 is arranged on the right shaft end of the stepping motor 3, a second roller 23 is arranged on the first presser foot lifting crank 22, and the second roller 23 is hinged through a shaft position screw 24 and is in rolling contact fit with the cam surface of the presser foot lifting cam 20, the stepping motor 3 rotates reversely to drive the first presser foot lifting crank 22 to rotate, the second roller 23 on the first presser foot lifting crank 22 drives the presser foot lifting cam 20 to move, and the presser foot lifting cam 20 drives the presser foot lifting assembly 18 through the presser foot lifting shaft 16 and the second presser foot lifting crank 17, so that the presser foot lifting assembly 18 completes the presser foot lifting action.
The presser foot cam 20 is of enclosed form.
The presser foot cam 20 is in the form of an opening.
The torsion spring 21 is installed on the presser foot lifting cam 20, and the torsion spring 21 is installed between the presser foot lifting cam 20 and the presser foot lifting support seat 15, so that the presser foot lifting cam 20 can be conveniently reset.
The torsion spring 21 takes a generally fixed form.
The torsion spring 21 adopts a bolt fixing mode, and the fixing mode of the torsion spring 21 is enlarged.
The left side of the trimming connecting rod shaft 8 is provided with a shaft clamp 25, so that the first roller 12 is limited conveniently.
Please refer to fig. 9, which is an embodiment of the present invention: a trimming assembly 7 is installed at one end of a trimming driving shaft 6, a shaft position screw 24 is installed at the other end of the trimming driving shaft 6, a first roller 12 is installed on the shaft position screw 24, a trimming cam 4 is installed and fixed on a stepping motor 3, the first roller 12 is in contact with the cam surface of the trimming cam 4, the stepping motor 3 drives the trimming cam 4, the trimming driving shaft 6 is driven to move through the first roller 12, and finally the trimming assembly 7 is driven to complete trimming.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (9)
1. Sewing machine's trimming lifts presser foot mechanism, including step motor, trimming cam, trimming connecting rod axle, trimming drive shaft, trimming subassembly, first presser foot crank of lifting, lift presser foot cam, second and lift presser foot crank, lift presser foot axle and lift presser foot subassembly, its characterized in that: the device comprises a stepping motor, a left motor mounting bracket and a right motor mounting bracket which are respectively mounted at two ends of the stepping motor, the left motor mounting bracket and the right motor mounting bracket are both mounted and fixed on a machine shell, a trimming shaft sleeve and a trimming connecting rod shaft sleeve are mounted on the machine shell, a trimming driving shaft penetrates through the trimming shaft sleeve, the end surface of the trimming driving shaft is abutted against the trimming shaft sleeve, a trimming component is mounted at the left end of the trimming driving shaft, a trimming connecting rod shaft penetrates through the trimming connecting rod shaft sleeve, the end surface of the trimming connecting rod shaft is abutted against the trimming connecting rod shaft sleeve, a trimming connecting rod is mounted at the outer end of the right side of the trimming connecting rod shaft and is hinged through a first trimming connecting rod shaft position screw, a first roller is mounted at the outer side of the first trimming connecting rod shaft position screw and is mounted and positioned through a first nut, the other end of the trimming connecting rod is connected with the end part of the trimming, the wire cutting assembly and the presser foot lifting assembly are controlled by an electric control program and driven by the stepping motor to execute.
2. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: the machine shell is provided with a pressure foot lifting support seat, the pressure foot lifting support seat is provided with a pressure foot lifting shaft, the right side of the pressure foot lifting shaft is provided with a second pressure foot lifting crank, the second pressure foot lifting crank is hinged with a pressure foot lifting assembly through a pressure foot lifting shaft position screw, the left side of the pressure foot lifting shaft is provided with a pressure foot lifting cam, the right side shaft end of the stepping motor is provided with a first pressure foot lifting crank, the first pressure foot lifting crank is provided with a second roller, the first roller is hinged through a shaft position screw, and the second roller is in rolling contact fit with the cam surface of the pressure foot lifting cam.
3. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 2, characterized in that: the presser foot cam is of enclosed form.
4. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 2, characterized in that: the presser foot cam is in the form of an opening.
5. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 2, characterized in that: and a torsion spring is arranged on the presser foot lifting cam and between the presser foot lifting cam and the presser foot lifting supporting seat.
6. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 5, wherein: the torsion spring adopts a common fixing form.
7. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 5, wherein: the torsion spring is in a bolt fixing form.
8. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: step motor passes through the wire respectively with encoder and motor position response piece electric connection, the encoder is split type encoder, and the encoder is fixed on right motor installing support right side, motor position response piece is fixed on the axle on step motor right side.
9. The thread trimming and presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: and a shaft clamp is arranged on the left side of the trimming connecting rod shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921732863.2U CN211339931U (en) | 2019-10-16 | 2019-10-16 | Thread trimming and presser foot lifting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921732863.2U CN211339931U (en) | 2019-10-16 | 2019-10-16 | Thread trimming and presser foot lifting mechanism of sewing machine |
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| Publication Number | Publication Date |
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| CN211339931U true CN211339931U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921732863.2U Active CN211339931U (en) | 2019-10-16 | 2019-10-16 | Thread trimming and presser foot lifting mechanism of sewing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528184A (en) * | 2019-10-16 | 2019-12-03 | 浙江美机缝纫机有限公司 | The thread-trimming lifter-presser foot mechanism of sewing machine |
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2019
- 2019-10-16 CN CN201921732863.2U patent/CN211339931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528184A (en) * | 2019-10-16 | 2019-12-03 | 浙江美机缝纫机有限公司 | The thread-trimming lifter-presser foot mechanism of sewing machine |
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