CN220703986U - Presser foot lifting mechanism of sewing machine - Google Patents
Presser foot lifting mechanism of sewing machine Download PDFInfo
- Publication number
- CN220703986U CN220703986U CN202320947512.3U CN202320947512U CN220703986U CN 220703986 U CN220703986 U CN 220703986U CN 202320947512 U CN202320947512 U CN 202320947512U CN 220703986 U CN220703986 U CN 220703986U
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- presser foot
- foot lifting
- roller
- assembly
- sewing machine
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- 238000009958 sewing Methods 0.000 title claims abstract description 23
- 230000002787 reinforcement Effects 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
The utility model discloses a presser foot lifting mechanism of a sewing machine, which comprises a driving source, a presser foot lifting assembly and a reinforcement assembly, wherein the driving source comprises a stepping motor, the stepping motor is in driving connection with the reinforcement assembly, and the reinforcement assembly is in driving connection with the presser foot lifting assembly. The presser foot lifting mechanism of the sewing machine provided by the utility model can complete an automatic presser foot lifting function without using an air cylinder, realizes the electronization of the presser foot lifting mechanism, improves the stability and the operation precision of the whole mechanism, and reduces the noise of presser foot lifting.
Description
Technical Field
The utility model relates to the field of sewing machines, in particular to a presser foot lifting mechanism of a sewing machine.
Background
The prior sewing machine generally uses an air cylinder as a driving source for lifting the presser foot. Referring to fig. 1, the existing presser foot lifting mechanism of the sewing machine mainly comprises a presser foot 1', a pressing rod 3', a lifting frame 4', a connecting block 5', a presser foot lifting rod 7', a pressing block 9', a cylinder 10', and the like; the pressing rod 1' is arranged on the shell 12', the presser foot 1' is fixedly connected with the pressing rod 3' through a screw 2', the connecting block 5' is fixedly connected with the pressing rod 3', the lifting frame 4' is sleeved on the pressing rod 3' and positioned below the connecting block 5', the presser foot lifting rod 7' is hinged with the shell 12' through an axial screw 8', the pressing block 9' is screwed on an extending rod of the air cylinder 10', and the air cylinder 10' is fixedly connected with the shell 12'.
When the presser foot lifting mechanism of the existing sewing machine lifts the presser foot, as shown in fig. 1, an extension rod of a cylinder 10 'in the presser foot lifting mechanism moves downwards, a pressing block 9' on the extension rod props against a presser foot lifting rod 7', so that the presser foot lifting rod 7' rotates around an axial screw 8', a presser foot lifting rod support 7' lifts a lifting frame 4', a connecting block 5' moves upwards, a pressing rod 3 'fixedly connected together moves upwards, and a presser foot 1' moves upwards, so that the purpose of lifting the presser foot is realized.
However, the presser foot lifting function of the sewing machine driven by the air cylinder is required to be matched with a corresponding pneumatic source based on the air cylinder driving, so that the whole sewing machine becomes more complex; meanwhile, when the air cylinder drives the presser foot lifting rod, impact force generated by the presser foot lifting rod is large, and the operation stability of the presser foot lifting rod is affected to a certain extent. Moreover, the air cylinder is used for driving, so that the noise is high, and the corresponding precision is difficult to control.
Therefore, how to effectively improve the stability and reliability of the presser foot lifting mechanism of the sewing machine is a problem to be solved in the field.
Disclosure of Invention
The utility model aims to provide a presser foot lifting mechanism of a sewing machine, which is driven by a stepping motor, realizes the automatic presser foot lifting function without using an air cylinder, and improves the reliability of the whole presser foot lifting mechanism.
In order to achieve the purpose, the presser foot lifting mechanism of the sewing machine comprises a driving source, a presser foot lifting assembly and a reinforcing assembly, wherein the driving source comprises a stepping motor, the stepping motor is in driving connection with the reinforcing assembly, and the reinforcing assembly is in driving connection with the presser foot lifting assembly.
Further, the force increasing assembly comprises a swing rod frame and a cam, wherein the cam is arranged on the stepping motor; the swing rod frame is rotatably arranged on the shell, a first roller and a second roller are arranged on the swing rod frame, and the first roller is in driving connection with the presser foot lifting assembly; the second roller is in abutting engagement with the cam.
Further, a sliding groove is formed in the presser foot lifting rod in the presser foot lifting assembly, and the sliding groove is matched with the first roller.
Further, the stepper motor is arranged on the casing through a motor mounting frame.
The presser foot lifting mechanism of the sewing machine provided by the utility model adopts the stepping motor as a driving source, and the booster component formed by the swinging rod and the cam is utilized, when the stepping motor drives the cam to rotate, the swinging rod frame rotates by a certain angle, and the roller on the swinging rod frame rolls in the sliding groove on the presser foot lifting rod, so that the presser foot lifting rod rotates, and the effect of lifting the presser foot is achieved.
The presser foot lifting mechanism of the sewing machine provided by the utility model can complete an automatic presser foot lifting function without using an air cylinder, realizes the electronization of the presser foot lifting mechanism, improves the stability and the operation precision of the whole mechanism, and reduces the noise of presser foot lifting.
Drawings
The utility model is further described below with reference to the drawings and the detailed description.
FIG. 1 is an exploded perspective view of a presser foot lifting mechanism of a conventional sewing machine;
reference numerals: first, a presser foot; secondly, a screw; thirdly, compressing the rod; fourth, lifting frames; fifthly, connecting blocks; 6'. Screw; seventhly, a presser foot lifting rod; 8'. An axial screw; 9'. Briquetting; 10'. Cylinder; 11'. Screw; 12'. A casing.
FIG. 2 is an exploded perspective view of the presser foot lifting mechanism of the sewing machine provided by the utility model;
reference numerals: 1. a presser foot; 2. a screw; 3. a pressing rod; 4. a lifting frame; 5. a connecting block; 6. a screw; 7. a presser foot lifting bar; 7-1, a chute; 8. an axial screw; 9. a first roller; 10. a swing rod frame; 10-1, a first mounting hole; 10-2, a second mounting hole; 10-3, a third placement hole; 11. a rolling pin; 12. an axial screw; 13. a second roller; 14. a rolling pin; 15. a cam; 15-1. A body; 15-2, connecting holes; 15-3, a first section; 15-4, a second section; 16. a screw; 17. a motor mounting rack; 17-1, a motor placement part; 17-2, fixing the placement part; 17-3, a placement groove; 18. a screw; 19. a screw; 20. a stepping motor; 21. and a housing.
Detailed Description
The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.
Referring to fig. 2, the presser foot lifting mechanism of the sewing machine provided by the utility model comprises a presser foot lifting assembly, a force increasing assembly and a driving source. The presser foot assembly, the force increasing assembly and the driving source are respectively and correspondingly arranged on the shell 21 of the sewing machine, the driving source is connected with the presser foot lifting assembly through the force increasing assembly in a driving mode, and the force increasing assembly can synchronously drive the presser foot lifting assembly to act under the driving of the driving source.
Specifically, the presser foot lifting assembly in the presser foot lifting mechanism comprises a presser foot 1, a pressing rod 3, a lifting frame 4, a connecting block 5 and a presser foot lifting rod 7.
The pressing rod 3 is mounted on the casing 21, and the presser foot 1 is arranged at the bottommost end of the pressing rod 3 and fixedly connected with the pressing rod 3 through the screw 2.
The connecting block 5 is arranged at the uppermost end of the compression rod 3 and is fixedly connected with the compression rod 3 through a screw 6.
The lifting frame 4 is sleeved on the pressing rod 3 and is arranged below the connecting block 5.
The presser foot lifting rod 7 is hinged to the shell 21 through an axial screw 8, and the presser foot lifting rod 7 can rotate around the axial screw 8; the whole of the above components forms a presser foot lifting mechanism which is arranged at the front middle section of the casing 21 and is used for lifting the presser foot.
The specific construction of the presser foot 1, the pressing rod 3, the lifting frame 4, the connecting block 5 and the presser foot lifting rod 7 is the same as that of the prior art, and is a well known basis for those skilled in the art, and will not be described herein.
The reinforcement component in the presser foot lifting mechanism mainly comprises a swing rod frame 10 and a cam 15 which are matched.
The swing rod frame 10 is arranged on the shell 21 in a swinging way and is matched with the presser foot lifting rod 7, and the presser foot lifting rod 7 can be synchronously driven to lift or descend in the swinging process; the cam 15 is disposed on the driving source and cooperates with the swing link frame 10, and the cam 15 can be synchronously rotated by the driving source, and synchronously drives the swing link frame 10 to swing on the housing 21 during rotation.
Specifically, the swing rod frame 10 in the reinforcement assembly is triangular as a whole, and three placement holes are respectively formed in three vertex angles: the first mounting hole 10-1, the second mounting hole 10-2, and the third mounting hole 10-3.
The first mounting hole 10-1 of the swing link frame 10 is used as a mounting hole and is hinged with the casing 21 by being matched with the axial screw 12, so that the swing link frame 10 can swing relative to the casing 21 around the axial screw 12.
The second mounting hole 10-2 of the swing rod frame 10 is used as a driving hole for connecting the first roller 9 to form a first driving end for driving the presser foot lifting bar 7. The first roller 9 is rotatably mounted at the second mounting hole 10-2 of the swing link frame 10 by the roller pin 11, and is integrally rotatable about the roller pin 11.
For cooperation with the first roller 9 arranged on the swing link frame 10, the rear end of the presser foot lifting lever 7 in this embodiment is provided with a corresponding chute 7-1. The chute 7-1 is matched with a first roller 9 on the swing rod frame 10, and can accommodate the first roller 9 to be inserted therein so as to drive the presser foot lifting rod 7 to swing. Preferably, in order to improve the stability of the fit between the runner 7-1 on the presser foot lifting bar 7 and the first roller 9, the runner 7-1 on the presser foot lifting bar 7 has a kidney-shaped hole structure.
In this way, when the presser foot lifting bar 7 and the swing bar frame 10 are respectively and correspondingly arranged on the machine shell 21, the first roller 9 on the swing bar frame 10 can be just inserted into the sliding groove 7-1 on the presser foot lifting bar 7.
The third mounting hole 10-3 of the rocker frame 10 serves as a drive hole for connecting the second roller 13 to form a second drive end for engaging the cam 15. The second roller 13 is rotatably installed at the third installation hole 10-3 of the swing link frame 10 by the roller pin 14, and is integrally rotatable around the roller pin 14. The second roller 13 can be brought into abutting engagement with the outer side surface of the cam 15 after the rocker frame 10 is mounted on the housing 21.
The cam 15 in the present booster assembly is provided with a corresponding connection hole 15-2 at a non-center corner of the body 15-1 for connection with the stepping motor 20 in the driving source. The outer peripheral surface of the cam body 15-1 is divided into two sections: the first section 15-3 is in a convex arc shape, and the second section 15-4 is in a concave arc shape. Meanwhile, the concave arc-shaped outer peripheral surface section 15-4 is used as a driving surface to be in abutting fit with the second roller 13 on the swing rod frame 10; meanwhile, the distance between the concave arc-shaped outer peripheral surface section 15-4 and the center of the connecting hole 15-2 is in a changing state. So that the cam 15, when rotated, has the concave arc-shaped outer peripheral surface section 15-4 thereon, which will generate a driving force against the abutting second roller 13.
The driving source in the presser foot lifting mechanism is specifically composed of a stepping motor 20, and a driving shaft of the stepping motor 20 is matched with a connecting hole 15-2 on a cam 15 to realize connection with the cam 15; while the stepper motor 20 is mounted on the housing 21 by means of a corresponding motor mount 17.
Specifically, the motor mount 17 herein includes a motor mounting portion 17-1 and a fixed mounting portion 17-2. The motor mounting portion 17-1 here cooperates with a mounting portion on the stepper motor 20, which is provided with corresponding mounting holes.
At the same time, a setting groove 17-3 matched with the cam 15 is formed on the inner side of the motor setting part 17-1, and the cam 15 can be set in the setting groove and can rotate freely in the setting groove 17-3.
The fixed mounting portion 17-2 is formed on the motor mounting portion 17-1 for fixedly connecting with the housing 21. The specific structure of the fixed mounting portion 17-2 is not limited herein, and may be determined according to actual needs.
Based on the motor mounting frame 17, when the stepping motor 20 is mounted on the casing 21, the rotating shaft of the stepping motor 20 is fixedly connected with the cam 15 through the screw 16, and then fixedly connected with the motor mounting portion 17-1 of the motor mounting frame through the screw 16, and at this time, the cam 15 mounted on the stepping motor 20 is just wholly positioned in the mounting groove 17-3 of the motor mounting frame 17. And the motor mount 17 is attached to the rear section of the housing 21 by screws 18.
The following illustrates the working process of the present utility model in specific application, and what is described herein is merely one specific application example of the present solution, and is not limited to the present solution.
First, the presser foot lifting assembly is arranged on the machine shell 21 based on the scheme;
on this basis, the first roller 9 is hinged to the rocker arm 10 by a roller pin 11, and the second roller 13 is hinged to the rocker arm 10 by a roller pin 14; the rocker arm 10 is then articulated to the housing 21 by means of the pivot screw 12, so that the first roller 9 on the rocker arm 10 is positioned exactly in the slide groove 7-1 on the presser foot lifting lever 7 and can be moved in the slide groove 7-1.
Next, the stepping motor 20 is fixed to the cam 15 by the screw 16, and the stepping motor 20 is fixed to the motor mount 17 by the screw 19; the motor mount 17 is fixed to the housing by means of screws 18 such that the driving surface of the cam 15 on the stepper motor 20 is in abutting engagement with the second roller 13 on the side bracket bar 10.
When the presser foot lifting mechanism of the sewing machine assembled and formed by the assembly carries out presser foot lifting, the stepping motor 20 serving as a driving source drives the cam 15 on the presser foot lifting mechanism to rotate, and as the driving surface on the cam 15 contacts with the roller 13, the cam 15 drives the second roller 13 to drive the swing rod frame 10 to rotate around the shaft position screw 12, and the swing rod frame 10 rotates around the shaft position screw 12, and simultaneously the first roller 9 on the swing rod frame 10 rolls in the kidney-shaped sliding groove on the presser foot lifting rod 7, so that the presser foot lifting rod 7 rotates around the shaft position screw 8; the presser foot lifting rod 7 upwards supports the lifting frame 4, so that the connecting block 5 moves upwards, the pressing rod 3 fixedly connected together moves upwards, the presser foot 1 moves upwards, and the purpose of lifting the presser foot is achieved.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (2)
1. The presser foot lifting mechanism of the sewing machine comprises a driving source and a presser foot lifting assembly and is characterized by further comprising a force increasing assembly, wherein the driving source comprises a stepping motor which is in driving connection with the force increasing assembly, and the force increasing assembly is in driving connection with the presser foot lifting assembly; the force increasing assembly comprises a swing rod frame and a cam, and the cam is arranged on the stepping motor; the swing rod frame is rotatably arranged on the shell, a first roller and a second roller are arranged on the swing rod frame, and the first roller is in driving connection with the presser foot lifting assembly; the second roller is in abutting fit with the cam; the presser foot lifting rod in the presser foot lifting assembly is provided with a sliding groove, and the sliding groove is matched with the first roller.
2. The presser foot lifting mechanism of a sewing machine of claim 1, wherein the stepper motor is mounted to the housing by a motor mount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320947512.3U CN220703986U (en) | 2023-04-24 | 2023-04-24 | Presser foot lifting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320947512.3U CN220703986U (en) | 2023-04-24 | 2023-04-24 | Presser foot lifting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220703986U true CN220703986U (en) | 2024-04-02 |
Family
ID=90439711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320947512.3U Active CN220703986U (en) | 2023-04-24 | 2023-04-24 | Presser foot lifting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220703986U (en) |
-
2023
- 2023-04-24 CN CN202320947512.3U patent/CN220703986U/en active Active
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